[#100] server auto re-binding

Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>

.docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19-alpine as basebuilder
+FROM golang:1.21-alpine as basebuilder
 RUN apk add --update make bash ca-certificates
 
 FROM basebuilder as builder

.forgejo/workflows/builds.yml

@@ -0,0 +1,23 @@
+on: [pull_request]
+
+jobs:
+  builds:
+    name: Builds
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go_versions: [ '1.20', '1.21' ]
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '${{ matrix.go_versions }}'
+
+      - name: Build binary
+        run: make
+
+      - name: Check dirty suffix
+        run: if [[ $(make version) == *"dirty"* ]]; then echo "Version has dirty suffix" && exit 1; fi

.forgejo/workflows/dco.yml

@@ -0,0 +1,20 @@
+on: [pull_request]
+
+jobs:
+  dco:
+    name: DCO
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+         fetch-depth: 0
+
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '1.21'
+
+      - name: Run commit format checker
+        uses: https://git.frostfs.info/TrueCloudLab/dco-go@v3
+        with:
+          from: 'origin/${{ github.event.pull_request.base.ref }}'

.forgejo/workflows/tests.yml

@@ -0,0 +1,41 @@
+on: [pull_request]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '1.21'
+          cache: true
+
+      - name: Install linters
+        run: make lint-install
+
+      - name: Run linters
+        run: make lint
+
+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go_versions: [ '1.20', '1.21' ]
+      fail-fast: false
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '${{ matrix.go_versions }}'
+
+      - name: Update Go modules
+        run: make dep
+
+      - name: Run tests
+        run: make test

.forgejo/workflows/vulncheck.yml

@@ -0,0 +1,21 @@
+on: [pull_request]
+
+jobs:
+  vulncheck:
+    name: Vulncheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: '1.21'
+
+      - name: Install govulncheck
+        run: go install golang.org/x/vuln/cmd/govulncheck@latest
+
+      - name: Run govulncheck
+        run: govulncheck ./...

.github/CODEOWNERS

@@ -1 +1 @@
-*       @alexvanin @KirillovDenis
+*       @alexvanin @dkirillov

.github/workflows/builds.yml

@@ -1,67 +0,0 @@
-name: Builds
-
-on:
-  pull_request:
-    branches:
-      - master
-      - 'support/*'
-    types: [opened, synchronize]
-    paths-ignore:
-      - '**/*.md'
-
-jobs:
-  build_cli:
-    name: Build CLI
-    runs-on: ubuntu-20.04
-
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Setup Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.19
-
-      - name: Restore Go modules from cache
-        uses: actions/cache@v2
-        with:
-          path: /home/runner/go/pkg/mod
-          key: deps-${{ hashFiles('go.sum') }}
-
-      - name: Update Go modules
-        run: make dep
-
-      - name: Build CLI
-        run: make
-
-      - name: Check version
-        run: if [[ $(make version) == *"dirty"* ]]; then exit 1; fi
-
-  build_image:
-    needs: build_cli
-    name: Build Docker image
-    runs-on: ubuntu-20.04
-
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.19
-
-      - name: Restore Go modules from cache
-        uses: actions/cache@v2
-        with:
-          path: /home/runner/go/pkg/mod
-          key: deps-${{ hashFiles('go.sum') }}
-
-      - name: Update Go modules
-        run: make dep
-
-      - name: Build Docker image
-        run: make image

.github/workflows/codeql-analysis.yml

@@ -1,67 +0,0 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "CodeQL"
-
-on:
-  push:
-    branches: [ master, 'support/*' ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ master, 'support/*' ]
-  schedule:
-    - cron: '35 8 * * 1'
-
-jobs:
-  analyze:
-    name: Analyze
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'go' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
-        # Learn more:
-        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
-
-    steps:
-    - name: Checkout repository
-      uses: actions/checkout@v2
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
-    #- run: |
-    #   make bootstrap
-    #   make release
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2

.github/workflows/dco.yml

@@ -1,22 +0,0 @@
-name: DCO check
-
-on:
-  pull_request:
-    branches:
-      - master
-      - 'support/*'
-
-jobs:
-  commits_check_job:
-    runs-on: ubuntu-latest
-    name: Commits Check
-    steps:
-    - name: Get PR Commits
-      id: 'get-pr-commits'
-      uses: tim-actions/get-pr-commits@master
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-    - name: DCO Check
-      uses: tim-actions/dco@master
-      with:
-        commits: ${{ steps.get-pr-commits.outputs.commits }}

.github/workflows/tests.yml

@@ -1,86 +0,0 @@
-name: Tests
-
-on:
-  pull_request:
-    branches:
-      - master
-      - 'support/*'
-    types: [opened, synchronize]
-    paths-ignore:
-      - '**/*.md'
-
-jobs:
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v2
-        with:
-          version: latest
-
-  cover:
-    name: Coverage
-    runs-on: ubuntu-20.04
-
-    env:
-      CGO_ENABLED: 1
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.19
-
-      - name: Restore Go modules from cache
-        uses: actions/cache@v2
-        with:
-          path: /home/runner/go/pkg/mod
-          key: deps-${{ hashFiles('go.sum') }}
-
-      - name: Update Go modules
-        run: make dep
-
-      - name: Test and write coverage profile
-        run: make cover
-
-      - name: Upload coverage results to Codecov
-        uses: codecov/codecov-action@v1
-        with:
-          fail_ci_if_error: false
-          path_to_write_report: ./coverage.txt
-          verbose: true
-
-  tests:
-    name: Tests
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        go_versions: [ '1.18', '1.19' ]
-      fail-fast: false
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: '${{ matrix.go_versions }}'
-
-      - name: Restore Go modules from cache
-        uses: actions/cache@v2
-        with:
-          path: /home/runner/go/pkg/mod
-          key: deps-${{ hashFiles('go.sum') }}
-
-      - name: Update Go modules
-        run: make dep
-
-      - name: Run tests
-        run: make test

.golangci.yml

@@ -4,7 +4,7 @@
 # options for analysis running
 run:
   # timeout for analysis, e.g. 30s, 5m, default is 1m
-  timeout: 5m
+  timeout: 15m
 
   # include test files or not, default is true
   tests: true
@@ -24,6 +24,16 @@ linters-settings:
   govet:
     # report about shadowed variables
     check-shadowing: false
+  custom:
+    truecloudlab-linters:
+      path: bin/external_linters.so
+      original-url: git.frostfs.info/TrueCloudLab/linters.git
+      settings:
+        noliteral:
+          enable: true
+          target-methods: ["Fatal"]
+          disable-packages: ["req", "r"]
+          constants-package: "git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 
 linters:
   enable:
@@ -45,6 +55,7 @@ linters:
     - gofmt
     - whitespace
     - goimports
+    - truecloudlab-linters
   disable-all: true
   fast: false
 

.pre-commit-config.yaml

@@ -37,6 +37,18 @@ repos:
 
   - repo: local
     hooks:
+      - id: make-lint-install
+        name: install linters
+        entry: make lint-install
+        language: system
+        pass_filenames: false
+
+      - id: make-lint
+        name: run linters
+        entry: make lint
+        language: system
+        pass_filenames: false
+
       - id: go-unit-tests
         name: go unit tests
         entry: make test

CHANGELOG.md

@@ -4,6 +4,61 @@ This document outlines major changes between releases.
 
 ## [Unreleased]
 
+## [0.28.1] - 2024-01-24
+
+### Added
+- Tree pool traversal limit (#92)
+- Add new `reconnect_interval` config param (#100)
+
+### Update from 0.28.0
+See new `frostfs.tree_pool_max_attempts` config parameter.
+
+### Fixed
+- Fix possibility of panic during SIGHUP (#99)
+- Handle query unescape and invalid bearer token errors (#107)
+- Fix HTTP/2 requests (#110)
+
+### Added
+- Support client side object cut (#70)
+  - Add `frostfs.client_cut` config param
+  - Add `frostfs.buffer_max_size_for_put` config param
+  - Add bucket/container caching
+  - Disable homomorphic hash for PUT if it's disabled in container itself
+- Add new `logger.destination` config param (#89)
+- Add support namespaces (#91)
+
+### Changed
+
+### Removed
+
+## [0.28.0] - Academy of Sciences - 2023-12-07
+
+### Fixed
+- `grpc` schemas in tree configuration (#62)
+- `GetSubTree` failures (#67)
+- Debian packaging (#69, #90)
+- Get latest version of tree node (#85)
+
+### Added
+- Support dump metrics descriptions (#29)
+- Support impersonate bearer token (#40, #45)
+- Tracing support (#20, #44, #60)
+- Object name resolving with tree service (#30)
+- Metrics for current endpoint status (#77)
+- Soft memory limit with `runtime.soft_memory_limit` (#72)
+- Add selection of the node of the latest version of the object (#85)
+
+### Changed
+- Update prometheus to v1.15.0 (#35)
+- Update go version to 1.19 (#50)
+- Finish rebranding (#2)
+- Use gate key to form object owner (#66)
+- Move log messages to constants (#36)
+- Uploader and downloader refactor (#73)
+
+### Removed
+- Drop `tree.service` param (now endpoints from `peers` section are used) (#59)
+
 ## [0.27.0] - Karpinsky - 2023-07-12
 
 This is a first FrostFS HTTP Gateway release named after
@@ -27,7 +82,7 @@ This is a first FrostFS HTTP Gateway release named after
 - Separate integration tests with build tags (#24)
 - Changed values for `frostfs_http_gw_state_health` metric (#32)
 
-### Updating from v0.26.0
+### Updating from neofs-http-gw v0.26.0
 
 To set system attributes use updated headers
 (you can use old ones for now, but their support will be dropped in the future releases):
@@ -36,10 +91,13 @@ To set system attributes use updated headers
 * `X-Attribute-NEOFS-*` -> `X-Attribute-SYSTEM-*`
 * `X-Attribute-neofs-*` -> `X-Attribute-system-*`
 
+
 ## Older versions
 
 This project is a fork of [NeoFS HTTP Gateway](https://github.com/nspcc-dev/neofs-http-gw) from version v0.26.0.
 To see CHANGELOG for older versions, refer to https://github.com/nspcc-dev/neofs-http-gw/blob/master/CHANGELOG.md.
 
 [0.27.0]: https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/compare/72734ab4...v0.27.0
-[Unreleased]: https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/compare/v0.27.0...master
+[0.28.0]: https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/compare/v0.27.0...v0.28.0
+[0.28.1]: https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/compare/v0.28.0...v0.28.1
+[Unreleased]: https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/compare/v0.28.1...master

CONTRIBUTING.md

@@ -3,8 +3,8 @@
 First, thank you for contributing! We love and encourage pull requests from
 everyone. Please follow the guidelines:
 
-- Check the open [issues](https://github.com/TrueCloudLab/frostfs-http-gw/issues) and
-  [pull requests](https://github.com/TrueCloudLab/frostfs-http-gw/pulls) for existing
+- Check the open [issues](https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/issues) and
+  [pull requests](https://git.frostfs.info/TrueCloudLab/frostfs-http-gw/pulls) for existing
   discussions.
 
 - Open an issue first, to discuss a new feature or enhancement.
@@ -27,20 +27,20 @@ Start by forking the `frostfs-http-gw` repository, make changes in a branch and
 send a pull request. We encourage pull requests to discuss code changes. Here
 are the steps in details:
 
-### Set up your GitHub Repository
+### Set up your git repository
 Fork [FrostFS HTTP Gateway
-upstream](https://github.com/TrueCloudLab/frostfs-http-gw/fork) source repository
+upstream](https://git.frostfs.info/repo/fork/8) source repository
 to your own personal repository. Copy the URL of your fork (you will need it for
 the `git clone` command below).
 
 ```sh
-$ git clone https://github.com/TrueCloudLab/frostfs-http-gw
+$ git clone https://git.frostfs.info/<username>/frostfs-http-gw.git
 ```
 
 ### Set up git remote as ``upstream``
 ```sh
 $ cd frostfs-http-gw
-$ git remote add upstream https://github.com/TrueCloudLab/frostfs-http-gw
+$ git remote add upstream https://git.frostfs.info/TrueCloudLab/frostfs-http-gw.git
 $ git fetch upstream
 $ git merge upstream/master
 ...
@@ -90,8 +90,8 @@ $ git push origin feature/123-something_awesome
 ```
 
 ### Create a Pull Request
-Pull requests can be created via GitHub. Refer to [this
-document](https://help.github.com/articles/creating-a-pull-request/) for
+Pull requests can be created via Forgejo. Refer to [this
+document](https://docs.codeberg.org/collaborating/pull-requests-and-git-flow/) for
 detailed steps on how to create a pull request. After a Pull Request gets peer
 reviewed and approved, it will be merged.
 

Makefile

@@ -2,17 +2,24 @@
 
 REPO ?= $(shell go list -m)
 VERSION ?= $(shell git describe --tags --match "v*" --dirty --always --abbrev=8 2>/dev/null || cat VERSION 2>/dev/null || echo "develop")
-GO_VERSION ?= 1.19
-LINT_VERSION ?= 1.49.0
+GO_VERSION ?= 1.20
+LINT_VERSION ?= 1.54.0
+TRUECLOUDLAB_LINT_VERSION ?= 0.0.2
 BUILD ?= $(shell date -u --iso=seconds)
 
 HUB_IMAGE ?= truecloudlab/frostfs-http-gw
 HUB_TAG ?= "$(shell echo ${VERSION} | sed 's/^v//')"
 
+METRICS_DUMP_OUT ?= ./metrics-dump.json
+
+OUTPUT_LINT_DIR ?= $(shell pwd)/bin
+LINT_DIR = $(OUTPUT_LINT_DIR)/golangci-lint-$(LINT_VERSION)-v$(TRUECLOUDLAB_LINT_VERSION)
+TMP_DIR := .cache
+
 # List of binaries to build. For now just one.
 BINDIR = bin
-DIRS = $(BINDIR)
-BINS = $(BINDIR)/frostfs-http-gw
+CMDS = $(addprefix frostfs-, $(notdir $(wildcard cmd/*)))
+BINS = $(addprefix $(BINDIR)/, $(CMDS))
 
 .PHONY: all $(BINS) $(DIRS) dep docker/ test cover fmt image image-push dirty-image lint docker/lint pre-commit unpre-commit version clean
 
@@ -25,13 +32,12 @@ PKG_VERSION ?= $(shell echo $(VERSION) | sed "s/^v//" | \
 
 # Make all binaries
 all: $(BINS)
-
 $(BINS):  $(DIRS) dep
 	@echo "⇒ Build $@"
 	CGO_ENABLED=0 \
 	go build -v -trimpath \
 	-ldflags "-X main.Version=$(VERSION)" \
-	-o $@ ./
+	-o $@ ./cmd/$(subst frostfs-,,$(notdir $@))
 
 $(DIRS):
 	@echo "⇒ Ensure dir: $@"
@@ -84,7 +90,7 @@ image:
 		--build-arg REPO=$(REPO) \
 		--build-arg VERSION=$(VERSION) \
 		--rm \
-		-f Dockerfile \
+		-f .docker/Dockerfile \
 		-t $(HUB_IMAGE):$(HUB_TAG) .
 
 # Push Docker image to the hub
@@ -99,12 +105,26 @@ dirty-image:
 		--build-arg REPO=$(REPO) \
 		--build-arg VERSION=$(VERSION) \
 		--rm \
-		-f Dockerfile.dirty \
+		-f .docker/Dockerfile.dirty \
 		-t $(HUB_IMAGE)-dirty:$(HUB_TAG) .
 
+# Install linters
+ lint-install:
+	@mkdir -p $(TMP_DIR)
+	@rm -rf $(TMP_DIR)/linters
+	@git -c advice.detachedHead=false clone --branch v$(TRUECLOUDLAB_LINT_VERSION) https://git.frostfs.info/TrueCloudLab/linters.git $(TMP_DIR)/linters
+	@@make -C $(TMP_DIR)/linters lib CGO_ENABLED=1 OUT_DIR=$(OUTPUT_LINT_DIR)
+	@rm -rf $(TMP_DIR)/linters
+	@rmdir $(TMP_DIR) 2>/dev/null || true
+	@CGO_ENABLED=1 GOBIN=$(LINT_DIR) go install github.com/golangci/golangci-lint/cmd/golangci-lint@v$(LINT_VERSION)
+
 # Run linters
 lint:
-	@golangci-lint --timeout=5m run
+	@if [ ! -d "$(LINT_DIR)" ]; then \
+ 		echo "Run make lint-install"; \
+ 		exit 1; \
+ 	fi
+	$(LINT_DIR)/golangci-lint --timeout=5m run
 
 # Run linters in Docker
 docker/lint:
@@ -143,4 +163,10 @@ debpackage:
 debclean:
 	dh clean
 
+# Dump metrics (use METRICS_DUMP_OUT variable to override default out file './metrics-dump.json')
+.PHONY: dump-metrics
+dump-metrics:
+	@go test ./metrics -run TestDescribeAll --tags=dump_metrics --out=$(abspath $(METRICS_DUMP_OUT))
+
+
 include help.mk

README.md

@@ -7,6 +7,8 @@
 
 ---
 [![Report](https://goreportcard.com/badge/git.frostfs.info/TrueCloudLab/frostfs-http-gw)](https://goreportcard.com/report/git.frostfs.info/TrueCloudLab/frostfs-http-gw)
+![Release](https://img.shields.io/badge/dynamic/json.svg?label=release&url=https://git.frostfs.info/api/v1/repos/TrueCloudLab/frostfs-http-gw/releases&query=$[0].tag_name&color=orange)
+![License](https://img.shields.io/badge/license-GPL--3.0-orange.svg)
 
 # FrostFS HTTP Gateway
 
@@ -484,43 +486,26 @@ the corresponding header to the upload request. Accessing the ACL protected data
 works the same way.
 
 ##### Example
-In order to generate a bearer token, you need to know the container owner key and
+In order to generate a bearer token, you need to have wallet (which will be used to sign the token) and
 the address of the sender who will do the request to FrostFS (in our case, it's a gateway wallet address).
 
 Suppose we have:
-* **KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr** (container owner key)
-* **NhVtreTTCoqsMQV5Wp55fqnriiUCpEaKm3** (token owner address)
-* **BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K** (container id)
+* **NhVtreTTCoqsMQV5Wp55fqnriiUCpEaKm3** (token owner (gateway address))
 
 Firstly, we need to encode the container id and the sender address to base64 (now it's base58).
 So use **base58** and **base64** utils.
 
-1. Encoding container id:
-```
-$ echo 'BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K' | base58 --decode | base64
-# output: mRnZWzewzxjzIPa7Fqlfqdl3TM1KpJ0YnsXsEhafJJg=
-```
-
-2. Encoding token owner id:
+1. Encoding token owner id:
 ```
 $ echo 'NhVtreTTCoqsMQV5Wp55fqnriiUCpEaKm3' | base58 --decode | base64
 # output: NezFK4ujidF+X7bB88uzREQzRQeAvdj3Gg==
 ```
 
-Now, we can form a Bearer token (10000 is liftetime expiration in epoch) and save it to **bearer.json**:
+2. Form a Bearer token (10000 is lifetime expiration in epoch) and save it to **bearer.json**:
 ```
 {
     "body": {
-        "eaclTable": {
-            "version": {
-                "major": 0,
-                "minor": 0
-            },
-            "containerID": {
-                "value": "mRnZWzewzxjzIPa7Fqlfqdl3TM1KpJ0YnsXsEhafJJg="
-            },
-            "records": []
-        },
+        "allowImpersonate": true,
         "ownerID": {
             "value": "NezFK4ujidF+X7bB88uzREQzRQeAvdj3Gg=="
         },
@@ -534,11 +519,12 @@ Now, we can form a Bearer token (10000 is liftetime expiration in epoch) and sav
 }
 ```
 
-Next, sign it with the container owner key:
+3. Sign it with the wallet:
 ```
 $ frostfs-cli util sign bearer-token --from bearer.json --to signed.json -w ./wallet.json
 ```
-Encoding to base64 to use via the header:
+
+4. Encode to base64 to use in header:
 ```
 $ base64 -w 0 signed.json
 # output: Ck4KKgoECAIQBhIiCiCZGdlbN7DPGPMg9rsWqV+p2XdMzUqknRiexewSFp8kmBIbChk17MUri6OJ0X5ftsHzy7NERDNFB4C92PcaGgMIkE4SZgohAxpsb7vfAso1F0X6hrm6WpRS14WsT3/Ct1SMoqRsT89KEkEEGxKi8GjKSf52YqhppgaOTQHbUsL3jn7SHLqS3ndAQ7NtAATnmRHleZw2V2xRRSRBQdjDC05KK83LhdSax72Fsw==

VERSION

@@ -1 +1 @@
-v0.27.0
+v0.28.1

app.go

@@ -1,539 +0,0 @@
-package main
-
-import (
-	"context"
-	"crypto/ecdsa"
-	"fmt"
-	"net/http"
-	"os"
-	"os/signal"
-	"strconv"
-	"sync"
-	"syscall"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/downloader"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/metrics"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/uploader"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
-	"github.com/fasthttp/router"
-	"github.com/nspcc-dev/neo-go/cli/flags"
-	"github.com/nspcc-dev/neo-go/cli/input"
-	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/nspcc-dev/neo-go/pkg/util"
-	"github.com/nspcc-dev/neo-go/pkg/wallet"
-	"github.com/spf13/viper"
-	"github.com/valyala/fasthttp"
-	"go.uber.org/zap"
-)
-
-type (
-	app struct {
-		log       *zap.Logger
-		logLevel  zap.AtomicLevel
-		pool      *pool.Pool
-		owner     *user.ID
-		cfg       *viper.Viper
-		webServer *fasthttp.Server
-		webDone   chan struct{}
-		resolver  *resolver.ContainerResolver
-		metrics   *gateMetrics
-		services  []*metrics.Service
-		settings  *appSettings
-		servers   []Server
-	}
-
-	appSettings struct {
-		Uploader   *uploader.Settings
-		Downloader *downloader.Settings
-	}
-
-	// App is an interface for the main gateway function.
-	App interface {
-		Wait()
-		Serve(context.Context)
-	}
-
-	// Option is an application option.
-	Option func(a *app)
-
-	gateMetrics struct {
-		logger   *zap.Logger
-		provider *metrics.GateMetrics
-		mu       sync.RWMutex
-		enabled  bool
-	}
-)
-
-// WithLogger returns Option to set a specific logger.
-func WithLogger(l *zap.Logger, lvl zap.AtomicLevel) Option {
-	return func(a *app) {
-		if l == nil {
-			return
-		}
-		a.log = l
-		a.logLevel = lvl
-	}
-}
-
-// WithConfig returns Option to use specific Viper configuration.
-func WithConfig(c *viper.Viper) Option {
-	return func(a *app) {
-		if c == nil {
-			return
-		}
-		a.cfg = c
-	}
-}
-
-func newApp(ctx context.Context, opt ...Option) App {
-	var (
-		key *ecdsa.PrivateKey
-		err error
-	)
-
-	a := &app{
-		log:       zap.L(),
-		cfg:       viper.GetViper(),
-		webServer: new(fasthttp.Server),
-		webDone:   make(chan struct{}),
-	}
-	for i := range opt {
-		opt[i](a)
-	}
-
-	// -- setup FastHTTP server --
-	a.webServer.Name = "frost-http-gw"
-	a.webServer.ReadBufferSize = a.cfg.GetInt(cfgWebReadBufferSize)
-	a.webServer.WriteBufferSize = a.cfg.GetInt(cfgWebWriteBufferSize)
-	a.webServer.ReadTimeout = a.cfg.GetDuration(cfgWebReadTimeout)
-	a.webServer.WriteTimeout = a.cfg.GetDuration(cfgWebWriteTimeout)
-	a.webServer.DisableHeaderNamesNormalizing = true
-	a.webServer.NoDefaultServerHeader = true
-	a.webServer.NoDefaultContentType = true
-	a.webServer.MaxRequestBodySize = a.cfg.GetInt(cfgWebMaxRequestBodySize)
-	a.webServer.DisablePreParseMultipartForm = true
-	a.webServer.StreamRequestBody = a.cfg.GetBool(cfgWebStreamRequestBody)
-	// -- -- -- -- -- -- -- -- -- -- -- -- -- --
-	key, err = getFrostFSKey(a)
-	if err != nil {
-		a.log.Fatal("failed to get frostfs credentials", zap.Error(err))
-	}
-
-	var owner user.ID
-	user.IDFromKey(&owner, key.PublicKey)
-	a.owner = &owner
-
-	var prm pool.InitParameters
-	prm.SetKey(key)
-	prm.SetNodeDialTimeout(a.cfg.GetDuration(cfgConTimeout))
-	prm.SetNodeStreamTimeout(a.cfg.GetDuration(cfgStreamTimeout))
-	prm.SetHealthcheckTimeout(a.cfg.GetDuration(cfgReqTimeout))
-	prm.SetClientRebalanceInterval(a.cfg.GetDuration(cfgRebalance))
-	prm.SetErrorThreshold(a.cfg.GetUint32(cfgPoolErrorThreshold))
-
-	for i := 0; ; i++ {
-		address := a.cfg.GetString(cfgPeers + "." + strconv.Itoa(i) + ".address")
-		weight := a.cfg.GetFloat64(cfgPeers + "." + strconv.Itoa(i) + ".weight")
-		priority := a.cfg.GetInt(cfgPeers + "." + strconv.Itoa(i) + ".priority")
-		if address == "" {
-			break
-		}
-		if weight <= 0 { // unspecified or wrong
-			weight = 1
-		}
-		if priority <= 0 { // unspecified or wrong
-			priority = 1
-		}
-		prm.AddNode(pool.NewNodeParam(priority, address, weight))
-		a.log.Info("add connection", zap.String("address", address),
-			zap.Float64("weight", weight), zap.Int("priority", priority))
-	}
-
-	a.pool, err = pool.NewPool(prm)
-	if err != nil {
-		a.log.Fatal("failed to create connection pool", zap.Error(err))
-	}
-
-	err = a.pool.Dial(ctx)
-	if err != nil {
-		a.log.Fatal("failed to dial pool", zap.Error(err))
-	}
-
-	a.initAppSettings()
-	a.initResolver()
-	a.initMetrics()
-
-	return a
-}
-
-func (a *app) initAppSettings() {
-	a.settings = &appSettings{
-		Uploader:   &uploader.Settings{},
-		Downloader: &downloader.Settings{},
-	}
-
-	a.updateSettings()
-}
-
-func (a *app) initResolver() {
-	var err error
-	a.resolver, err = resolver.NewContainerResolver(a.getResolverConfig())
-	if err != nil {
-		a.log.Fatal("failed to create resolver", zap.Error(err))
-	}
-}
-
-func (a *app) getResolverConfig() ([]string, *resolver.Config) {
-	resolveCfg := &resolver.Config{
-		FrostFS:    resolver.NewFrostFSResolver(a.pool),
-		RPCAddress: a.cfg.GetString(cfgRPCEndpoint),
-	}
-
-	order := a.cfg.GetStringSlice(cfgResolveOrder)
-	if resolveCfg.RPCAddress == "" {
-		order = remove(order, resolver.NNSResolver)
-		a.log.Warn(fmt.Sprintf("resolver '%s' won't be used since '%s' isn't provided", resolver.NNSResolver, cfgRPCEndpoint))
-	}
-
-	if len(order) == 0 {
-		a.log.Info("container resolver will be disabled because of resolvers 'resolver_order' is empty")
-	}
-
-	return order, resolveCfg
-}
-
-func (a *app) initMetrics() {
-	gateMetricsProvider := metrics.NewGateMetrics(a.pool)
-	a.metrics = newGateMetrics(a.log, gateMetricsProvider, a.cfg.GetBool(cfgPrometheusEnabled))
-	a.metrics.SetHealth(metrics.HealthStatusStarting)
-}
-
-func newGateMetrics(logger *zap.Logger, provider *metrics.GateMetrics, enabled bool) *gateMetrics {
-	if !enabled {
-		logger.Warn("metrics are disabled")
-	}
-	return &gateMetrics{
-		logger:   logger,
-		provider: provider,
-		enabled:  enabled,
-	}
-}
-
-func (m *gateMetrics) SetEnabled(enabled bool) {
-	if !enabled {
-		m.logger.Warn("metrics are disabled")
-	}
-
-	m.mu.Lock()
-	m.enabled = enabled
-	m.mu.Unlock()
-}
-
-func (m *gateMetrics) SetHealth(status metrics.HealthStatus) {
-	m.mu.RLock()
-	if !m.enabled {
-		m.mu.RUnlock()
-		return
-	}
-	m.mu.RUnlock()
-
-	m.provider.SetHealth(status)
-}
-
-func (m *gateMetrics) Shutdown() {
-	m.mu.Lock()
-	if m.enabled {
-		m.provider.SetHealth(metrics.HealthStatusShuttingDown)
-		m.enabled = false
-	}
-	m.provider.Unregister()
-	m.mu.Unlock()
-}
-
-func remove(list []string, element string) []string {
-	for i, item := range list {
-		if item == element {
-			return append(list[:i], list[i+1:]...)
-		}
-	}
-	return list
-}
-
-func getFrostFSKey(a *app) (*ecdsa.PrivateKey, error) {
-	walletPath := a.cfg.GetString(cfgWalletPath)
-
-	if len(walletPath) == 0 {
-		a.log.Info("no wallet path specified, creating ephemeral key automatically for this run")
-		key, err := keys.NewPrivateKey()
-		if err != nil {
-			return nil, err
-		}
-		return &key.PrivateKey, nil
-	}
-	w, err := wallet.NewWalletFromFile(walletPath)
-	if err != nil {
-		return nil, err
-	}
-
-	var password *string
-	if a.cfg.IsSet(cfgWalletPassphrase) {
-		pwd := a.cfg.GetString(cfgWalletPassphrase)
-		password = &pwd
-	}
-
-	address := a.cfg.GetString(cfgWalletAddress)
-
-	return getKeyFromWallet(w, address, password)
-}
-
-func getKeyFromWallet(w *wallet.Wallet, addrStr string, password *string) (*ecdsa.PrivateKey, error) {
-	var addr util.Uint160
-	var err error
-
-	if addrStr == "" {
-		addr = w.GetChangeAddress()
-	} else {
-		addr, err = flags.ParseAddress(addrStr)
-		if err != nil {
-			return nil, fmt.Errorf("invalid address")
-		}
-	}
-
-	acc := w.GetAccount(addr)
-	if acc == nil {
-		return nil, fmt.Errorf("couldn't find wallet account for %s", addrStr)
-	}
-
-	if password == nil {
-		pwd, err := input.ReadPassword("Enter password > ")
-		if err != nil {
-			return nil, fmt.Errorf("couldn't read password")
-		}
-		password = &pwd
-	}
-
-	if err := acc.Decrypt(*password, w.Scrypt); err != nil {
-		return nil, fmt.Errorf("couldn't decrypt account: %w", err)
-	}
-
-	return &acc.PrivateKey().PrivateKey, nil
-}
-
-func (a *app) Wait() {
-	a.log.Info("starting application", zap.String("app_name", "frostfs-http-gw"), zap.String("version", Version))
-
-	a.setHealthStatus()
-
-	<-a.webDone // wait for web-server to be stopped
-}
-
-func (a *app) setHealthStatus() {
-	a.metrics.SetHealth(metrics.HealthStatusReady)
-}
-
-func (a *app) Serve(ctx context.Context) {
-	uploadRoutes := uploader.New(ctx, a.AppParams(), a.settings.Uploader)
-	downloadRoutes := downloader.New(ctx, a.AppParams(), a.settings.Downloader)
-
-	// Configure router.
-	a.configureRouter(uploadRoutes, downloadRoutes)
-
-	a.startServices()
-	a.initServers(ctx)
-
-	for i := range a.servers {
-		go func(i int) {
-			a.log.Info("starting server", zap.String("address", a.servers[i].Address()))
-			if err := a.webServer.Serve(a.servers[i].Listener()); err != nil && err != http.ErrServerClosed {
-				a.log.Fatal("listen and serve", zap.Error(err))
-			}
-		}(i)
-	}
-
-	sigs := make(chan os.Signal, 1)
-	signal.Notify(sigs, syscall.SIGHUP)
-
-LOOP:
-	for {
-		select {
-		case <-ctx.Done():
-			break LOOP
-		case <-sigs:
-			a.configReload()
-		}
-	}
-
-	a.log.Info("shutting down web server", zap.Error(a.webServer.Shutdown()))
-
-	a.metrics.Shutdown()
-	a.stopServices()
-
-	close(a.webDone)
-}
-
-func (a *app) configReload() {
-	a.log.Info("SIGHUP config reload started")
-	if !a.cfg.IsSet(cmdConfig) && !a.cfg.IsSet(cmdConfigDir) {
-		a.log.Warn("failed to reload config because it's missed")
-		return
-	}
-	if err := readInConfig(a.cfg); err != nil {
-		a.log.Warn("failed to reload config", zap.Error(err))
-		return
-	}
-
-	if lvl, err := getLogLevel(a.cfg); err != nil {
-		a.log.Warn("log level won't be updated", zap.Error(err))
-	} else {
-		a.logLevel.SetLevel(lvl)
-	}
-
-	if err := a.resolver.UpdateResolvers(a.getResolverConfig()); err != nil {
-		a.log.Warn("failed to update resolvers", zap.Error(err))
-	}
-
-	if err := a.updateServers(); err != nil {
-		a.log.Warn("failed to reload server parameters", zap.Error(err))
-	}
-
-	a.stopServices()
-	a.startServices()
-
-	a.updateSettings()
-
-	a.metrics.SetEnabled(a.cfg.GetBool(cfgPrometheusEnabled))
-	a.setHealthStatus()
-
-	a.log.Info("SIGHUP config reload completed")
-}
-
-func (a *app) updateSettings() {
-	a.settings.Uploader.SetDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
-	a.settings.Downloader.SetZipCompression(a.cfg.GetBool(cfgZipCompression))
-}
-
-func (a *app) startServices() {
-	pprofConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPprofEnabled), Address: a.cfg.GetString(cfgPprofAddress)}
-	pprofService := metrics.NewPprofService(a.log, pprofConfig)
-	a.services = append(a.services, pprofService)
-	go pprofService.Start()
-
-	prometheusConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPrometheusEnabled), Address: a.cfg.GetString(cfgPrometheusAddress)}
-	prometheusService := metrics.NewPrometheusService(a.log, prometheusConfig)
-	a.services = append(a.services, prometheusService)
-	go prometheusService.Start()
-}
-
-func (a *app) stopServices() {
-	ctx, cancel := context.WithTimeout(context.Background(), defaultShutdownTimeout)
-	defer cancel()
-
-	for _, svc := range a.services {
-		svc.ShutDown(ctx)
-	}
-}
-
-func (a *app) configureRouter(uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) {
-	r := router.New()
-	r.RedirectTrailingSlash = true
-	r.NotFound = func(r *fasthttp.RequestCtx) {
-		response.Error(r, "Not found", fasthttp.StatusNotFound)
-	}
-	r.MethodNotAllowed = func(r *fasthttp.RequestCtx) {
-		response.Error(r, "Method Not Allowed", fasthttp.StatusMethodNotAllowed)
-	}
-	r.POST("/upload/{cid}", a.logger(uploadRoutes.Upload))
-	a.log.Info("added path /upload/{cid}")
-	r.GET("/get/{cid}/{oid}", a.logger(downloadRoutes.DownloadByAddress))
-	r.HEAD("/get/{cid}/{oid}", a.logger(downloadRoutes.HeadByAddress))
-	a.log.Info("added path /get/{cid}/{oid}")
-	r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(downloadRoutes.DownloadByAttribute))
-	r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(downloadRoutes.HeadByAttribute))
-	a.log.Info("added path /get_by_attribute/{cid}/{attr_key}/{attr_val:*}")
-	r.GET("/zip/{cid}/{prefix:*}", a.logger(downloadRoutes.DownloadZipped))
-	a.log.Info("added path /zip/{cid}/{prefix}")
-
-	a.webServer.Handler = r.Handler
-}
-
-func (a *app) logger(h fasthttp.RequestHandler) fasthttp.RequestHandler {
-	return func(ctx *fasthttp.RequestCtx) {
-		a.log.Info("request", zap.String("remote", ctx.RemoteAddr().String()),
-			zap.ByteString("method", ctx.Method()),
-			zap.ByteString("path", ctx.Path()),
-			zap.ByteString("query", ctx.QueryArgs().QueryString()),
-			zap.Uint64("id", ctx.ID()))
-		h(ctx)
-	}
-}
-
-func (a *app) AppParams() *utils.AppParams {
-	return &utils.AppParams{
-		Logger:   a.log,
-		Pool:     a.pool,
-		Owner:    a.owner,
-		Resolver: a.resolver,
-	}
-}
-
-func (a *app) initServers(ctx context.Context) {
-	serversInfo := fetchServers(a.cfg)
-
-	a.servers = make([]Server, 0, len(serversInfo))
-	for _, serverInfo := range serversInfo {
-		fields := []zap.Field{
-			zap.String("address", serverInfo.Address), zap.Bool("tls enabled", serverInfo.TLS.Enabled),
-			zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile),
-		}
-		srv, err := newServer(ctx, serverInfo)
-		if err != nil {
-			a.log.Warn("failed to add server", append(fields, zap.Error(err))...)
-			continue
-		}
-
-		a.servers = append(a.servers, srv)
-		a.log.Info("add server", fields...)
-	}
-
-	if len(a.servers) == 0 {
-		a.log.Fatal("no healthy servers")
-	}
-}
-
-func (a *app) updateServers() error {
-	serversInfo := fetchServers(a.cfg)
-
-	var found bool
-	for _, serverInfo := range serversInfo {
-		index := a.serverIndex(serverInfo.Address)
-		if index == -1 {
-			continue
-		}
-
-		if serverInfo.TLS.Enabled {
-			if err := a.servers[index].UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
-				return fmt.Errorf("failed to update tls certs: %w", err)
-			}
-		}
-		found = true
-	}
-
-	if !found {
-		return fmt.Errorf("invalid servers configuration: no known server found")
-	}
-
-	return nil
-}
-
-func (a *app) serverIndex(address string) int {
-	for i := range a.servers {
-		if a.servers[i].Address() == address {
-			return i
-		}
-	}
-	return -1
-}

cmd/http-gw/app.go

@@ -0,0 +1,819 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"os"
+	"os/signal"
+	"runtime/debug"
+	"strconv"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
+
+	v2container "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/container"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/frostfs/services"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/metrics"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	treepool "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/fasthttp/router"
+	"github.com/nspcc-dev/neo-go/cli/flags"
+	"github.com/nspcc-dev/neo-go/cli/input"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/wallet"
+	"github.com/spf13/viper"
+	"github.com/valyala/fasthttp"
+	"go.uber.org/zap"
+	"golang.org/x/exp/slices"
+)
+
+type (
+	app struct {
+		ctx       context.Context
+		log       *zap.Logger
+		logLevel  zap.AtomicLevel
+		pool      *pool.Pool
+		treePool  *treepool.Pool
+		key       *keys.PrivateKey
+		owner     *user.ID
+		cfg       *viper.Viper
+		webServer *fasthttp.Server
+		webDone   chan struct{}
+		resolver  *resolver.ContainerResolver
+		metrics   *gateMetrics
+		services  []*metrics.Service
+		settings  *appSettings
+
+		servers       []Server
+		unbindServers []ServerInfo
+		mu            sync.RWMutex
+	}
+
+	// App is an interface for the main gateway function.
+	App interface {
+		Wait()
+		Serve()
+	}
+
+	// Option is an application option.
+	Option func(a *app)
+
+	gateMetrics struct {
+		logger   *zap.Logger
+		provider *metrics.GateMetrics
+		mu       sync.RWMutex
+		enabled  bool
+	}
+
+	// appSettings stores reloading parameters, so it has to provide getters and setters which use RWMutex.
+	appSettings struct {
+		reconnectInterval time.Duration
+
+		mu                  sync.RWMutex
+		defaultTimestamp    bool
+		zipCompression      bool
+		clientCut           bool
+		bufferMaxSizeForPut uint64
+		namespaceHeader     string
+		defaultNamespaces   []string
+	}
+)
+
+// WithLogger returns Option to set a specific logger.
+func WithLogger(l *zap.Logger, lvl zap.AtomicLevel) Option {
+	return func(a *app) {
+		if l == nil {
+			return
+		}
+		a.log = l
+		a.logLevel = lvl
+	}
+}
+
+// WithConfig returns Option to use specific Viper configuration.
+func WithConfig(c *viper.Viper) Option {
+	return func(a *app) {
+		if c == nil {
+			return
+		}
+		a.cfg = c
+	}
+}
+
+func newApp(ctx context.Context, opt ...Option) App {
+	a := &app{
+		ctx:       ctx,
+		log:       zap.L(),
+		cfg:       viper.GetViper(),
+		webServer: new(fasthttp.Server),
+		webDone:   make(chan struct{}),
+	}
+	for i := range opt {
+		opt[i](a)
+	}
+
+	// -- setup FastHTTP server --
+	a.webServer.Name = "frost-http-gw"
+	a.webServer.ReadBufferSize = a.cfg.GetInt(cfgWebReadBufferSize)
+	a.webServer.WriteBufferSize = a.cfg.GetInt(cfgWebWriteBufferSize)
+	a.webServer.ReadTimeout = a.cfg.GetDuration(cfgWebReadTimeout)
+	a.webServer.WriteTimeout = a.cfg.GetDuration(cfgWebWriteTimeout)
+	a.webServer.DisableHeaderNamesNormalizing = true
+	a.webServer.NoDefaultServerHeader = true
+	a.webServer.NoDefaultContentType = true
+	a.webServer.MaxRequestBodySize = a.cfg.GetInt(cfgWebMaxRequestBodySize)
+	a.webServer.DisablePreParseMultipartForm = true
+	a.webServer.StreamRequestBody = a.cfg.GetBool(cfgWebStreamRequestBody)
+	// -- -- -- -- -- -- -- -- -- -- -- -- -- --
+	a.pool, a.treePool, a.key = getPools(ctx, a.log, a.cfg)
+
+	var owner user.ID
+	user.IDFromKey(&owner, a.key.PrivateKey.PublicKey)
+	a.owner = &owner
+
+	a.setRuntimeParameters()
+
+	a.initAppSettings()
+	a.initResolver()
+	a.initMetrics()
+	a.initTracing(ctx)
+
+	return a
+}
+
+func (s *appSettings) DefaultTimestamp() bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.defaultTimestamp
+}
+
+func (s *appSettings) setDefaultTimestamp(val bool) {
+	s.mu.Lock()
+	s.defaultTimestamp = val
+	s.mu.Unlock()
+}
+
+func (s *appSettings) ZipCompression() bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.zipCompression
+}
+
+func (s *appSettings) setZipCompression(val bool) {
+	s.mu.Lock()
+	s.zipCompression = val
+	s.mu.Unlock()
+}
+
+func (s *appSettings) ClientCut() bool {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.clientCut
+}
+
+func (s *appSettings) setClientCut(val bool) {
+	s.mu.Lock()
+	s.clientCut = val
+	s.mu.Unlock()
+}
+
+func (s *appSettings) BufferMaxSizeForPut() uint64 {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.bufferMaxSizeForPut
+}
+
+func (s *appSettings) setBufferMaxSizeForPut(val uint64) {
+	s.mu.Lock()
+	s.bufferMaxSizeForPut = val
+	s.mu.Unlock()
+}
+
+func (a *app) initAppSettings() {
+	a.settings = &appSettings{
+		reconnectInterval: fetchReconnectInterval(a.cfg),
+	}
+	a.updateSettings()
+}
+
+func (a *app) initResolver() {
+	var err error
+	a.resolver, err = resolver.NewContainerResolver(a.getResolverConfig())
+	if err != nil {
+		a.log.Fatal(logs.FailedToCreateResolver, zap.Error(err))
+	}
+}
+
+func (a *app) getResolverConfig() ([]string, *resolver.Config) {
+	resolveCfg := &resolver.Config{
+		FrostFS:    resolver.NewFrostFSResolver(a.pool),
+		RPCAddress: a.cfg.GetString(cfgRPCEndpoint),
+		Settings:   a.settings,
+	}
+
+	order := a.cfg.GetStringSlice(cfgResolveOrder)
+	if resolveCfg.RPCAddress == "" {
+		order = remove(order, resolver.NNSResolver)
+		a.log.Warn(logs.ResolverNNSWontBeUsedSinceRPCEndpointIsntProvided)
+	}
+
+	if len(order) == 0 {
+		a.log.Info(logs.ContainerResolverWillBeDisabledBecauseOfResolversResolverOrderIsEmpty)
+	}
+
+	return order, resolveCfg
+}
+
+func (a *app) initMetrics() {
+	gateMetricsProvider := metrics.NewGateMetrics(a.pool)
+	a.metrics = newGateMetrics(a.log, gateMetricsProvider, a.cfg.GetBool(cfgPrometheusEnabled))
+	a.metrics.SetHealth(metrics.HealthStatusStarting)
+}
+
+func newGateMetrics(logger *zap.Logger, provider *metrics.GateMetrics, enabled bool) *gateMetrics {
+	if !enabled {
+		logger.Warn(logs.MetricsAreDisabled)
+	}
+	return &gateMetrics{
+		logger:   logger,
+		provider: provider,
+		enabled:  enabled,
+	}
+}
+
+func (m *gateMetrics) isEnabled() bool {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	return m.enabled
+}
+
+func (m *gateMetrics) SetEnabled(enabled bool) {
+	if !enabled {
+		m.logger.Warn(logs.MetricsAreDisabled)
+	}
+
+	m.mu.Lock()
+	m.enabled = enabled
+	m.mu.Unlock()
+}
+
+func (m *gateMetrics) SetHealth(status metrics.HealthStatus) {
+	if !m.isEnabled() {
+		return
+	}
+
+	m.provider.SetHealth(status)
+}
+
+func (m *gateMetrics) SetVersion(ver string) {
+	if !m.isEnabled() {
+		return
+	}
+
+	m.provider.SetVersion(ver)
+}
+
+func (m *gateMetrics) Shutdown() {
+	m.mu.Lock()
+	if m.enabled {
+		m.provider.SetHealth(metrics.HealthStatusShuttingDown)
+		m.enabled = false
+	}
+	m.provider.Unregister()
+	m.mu.Unlock()
+}
+
+func (m *gateMetrics) MarkHealthy(endpoint string) {
+	if !m.isEnabled() {
+		return
+	}
+
+	m.provider.MarkHealthy(endpoint)
+}
+
+func (m *gateMetrics) MarkUnhealthy(endpoint string) {
+	if !m.isEnabled() {
+		return
+	}
+
+	m.provider.MarkUnhealthy(endpoint)
+}
+
+func remove(list []string, element string) []string {
+	for i, item := range list {
+		if item == element {
+			return append(list[:i], list[i+1:]...)
+		}
+	}
+	return list
+}
+
+func getFrostFSKey(cfg *viper.Viper, log *zap.Logger) (*keys.PrivateKey, error) {
+	walletPath := cfg.GetString(cfgWalletPath)
+
+	if len(walletPath) == 0 {
+		log.Info(logs.NoWalletPathSpecifiedCreatingEphemeralKeyAutomaticallyForThisRun)
+		key, err := keys.NewPrivateKey()
+		if err != nil {
+			return nil, err
+		}
+		return key, nil
+	}
+	w, err := wallet.NewWalletFromFile(walletPath)
+	if err != nil {
+		return nil, err
+	}
+
+	var password *string
+	if cfg.IsSet(cfgWalletPassphrase) {
+		pwd := cfg.GetString(cfgWalletPassphrase)
+		password = &pwd
+	}
+
+	address := cfg.GetString(cfgWalletAddress)
+
+	return getKeyFromWallet(w, address, password)
+}
+
+func getKeyFromWallet(w *wallet.Wallet, addrStr string, password *string) (*keys.PrivateKey, error) {
+	var addr util.Uint160
+	var err error
+
+	if addrStr == "" {
+		addr = w.GetChangeAddress()
+	} else {
+		addr, err = flags.ParseAddress(addrStr)
+		if err != nil {
+			return nil, fmt.Errorf("invalid address")
+		}
+	}
+
+	acc := w.GetAccount(addr)
+	if acc == nil {
+		return nil, fmt.Errorf("couldn't find wallet account for %s", addrStr)
+	}
+
+	if password == nil {
+		pwd, err := input.ReadPassword("Enter password > ")
+		if err != nil {
+			return nil, fmt.Errorf("couldn't read password")
+		}
+		password = &pwd
+	}
+
+	if err := acc.Decrypt(*password, w.Scrypt); err != nil {
+		return nil, fmt.Errorf("couldn't decrypt account: %w", err)
+	}
+
+	return acc.PrivateKey(), nil
+}
+
+func (a *app) Wait() {
+	a.log.Info(logs.StartingApplication, zap.String("app_name", "frostfs-http-gw"), zap.String("version", Version))
+
+	a.metrics.SetVersion(Version)
+	a.setHealthStatus()
+
+	<-a.webDone // wait for web-server to be stopped
+}
+
+func (a *app) setHealthStatus() {
+	a.metrics.SetHealth(metrics.HealthStatusReady)
+}
+
+func (a *app) Serve() {
+	handler := handler.New(a.AppParams(), a.settings, tree.NewTree(services.NewPoolWrapper(a.treePool)))
+
+	// Configure router.
+	a.configureRouter(handler)
+
+	a.startServices()
+	a.initServers(a.ctx)
+
+	servs := a.getServers()
+
+	for i := range servs {
+		go func(i int) {
+			a.log.Info(logs.StartingServer, zap.String("address", servs[i].Address()))
+			if err := a.webServer.Serve(servs[i].Listener()); err != nil && err != http.ErrServerClosed {
+				a.metrics.MarkUnhealthy(servs[i].Address())
+				a.log.Fatal(logs.ListenAndServe, zap.Error(err))
+			}
+		}(i)
+	}
+
+	if len(a.unbindServers) != 0 {
+		a.scheduleReconnect(a.ctx, a.webServer)
+	}
+
+	sigs := make(chan os.Signal, 1)
+	signal.Notify(sigs, syscall.SIGHUP)
+
+LOOP:
+	for {
+		select {
+		case <-a.ctx.Done():
+			break LOOP
+		case <-sigs:
+			a.configReload(a.ctx)
+		}
+	}
+
+	a.log.Info(logs.ShuttingDownWebServer, zap.Error(a.webServer.Shutdown()))
+
+	a.metrics.Shutdown()
+	a.stopServices()
+	a.shutdownTracing()
+
+	close(a.webDone)
+}
+
+func (a *app) shutdownTracing() {
+	const tracingShutdownTimeout = 5 * time.Second
+	shdnCtx, cancel := context.WithTimeout(context.Background(), tracingShutdownTimeout)
+	defer cancel()
+
+	if err := tracing.Shutdown(shdnCtx); err != nil {
+		a.log.Warn(logs.FailedToShutdownTracing, zap.Error(err))
+	}
+}
+
+func (a *app) configReload(ctx context.Context) {
+	a.log.Info(logs.SIGHUPConfigReloadStarted)
+	if !a.cfg.IsSet(cmdConfig) && !a.cfg.IsSet(cmdConfigDir) {
+		a.log.Warn(logs.FailedToReloadConfigBecauseItsMissed)
+		return
+	}
+	if err := readInConfig(a.cfg); err != nil {
+		a.log.Warn(logs.FailedToReloadConfig, zap.Error(err))
+		return
+	}
+
+	if lvl, err := getLogLevel(a.cfg); err != nil {
+		a.log.Warn(logs.LogLevelWontBeUpdated, zap.Error(err))
+	} else {
+		a.logLevel.SetLevel(lvl)
+	}
+
+	if err := a.resolver.UpdateResolvers(a.getResolverConfig()); err != nil {
+		a.log.Warn(logs.FailedToUpdateResolvers, zap.Error(err))
+	}
+
+	if err := a.updateServers(); err != nil {
+		a.log.Warn(logs.FailedToReloadServerParameters, zap.Error(err))
+	}
+
+	a.setRuntimeParameters()
+
+	a.stopServices()
+	a.startServices()
+
+	a.updateSettings()
+
+	a.metrics.SetEnabled(a.cfg.GetBool(cfgPrometheusEnabled))
+	a.initTracing(ctx)
+	a.setHealthStatus()
+
+	a.log.Info(logs.SIGHUPConfigReloadCompleted)
+}
+
+func (a *app) updateSettings() {
+	a.settings.setDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
+	a.settings.setZipCompression(a.cfg.GetBool(cfgZipCompression))
+	a.settings.setClientCut(a.cfg.GetBool(cfgClientCut))
+	a.settings.setBufferMaxSizeForPut(a.cfg.GetUint64(cfgBufferMaxSizeForPut))
+	a.settings.setNamespaceHeader(a.cfg.GetString(cfgResolveNamespaceHeader))
+	a.settings.setDefaultNamespaces(a.cfg.GetStringSlice(cfgResolveDefaultNamespaces))
+}
+
+func (a *app) startServices() {
+	pprofConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPprofEnabled), Address: a.cfg.GetString(cfgPprofAddress)}
+	pprofService := metrics.NewPprofService(a.log, pprofConfig)
+	a.services = append(a.services, pprofService)
+	go pprofService.Start()
+
+	prometheusConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPrometheusEnabled), Address: a.cfg.GetString(cfgPrometheusAddress)}
+	prometheusService := metrics.NewPrometheusService(a.log, prometheusConfig)
+	a.services = append(a.services, prometheusService)
+	go prometheusService.Start()
+}
+
+func (a *app) stopServices() {
+	ctx, cancel := context.WithTimeout(context.Background(), defaultShutdownTimeout)
+	defer cancel()
+
+	for _, svc := range a.services {
+		svc.ShutDown(ctx)
+	}
+}
+
+func (a *app) configureRouter(handler *handler.Handler) {
+	r := router.New()
+	r.RedirectTrailingSlash = true
+	r.NotFound = func(r *fasthttp.RequestCtx) {
+		response.Error(r, "Not found", fasthttp.StatusNotFound)
+	}
+	r.MethodNotAllowed = func(r *fasthttp.RequestCtx) {
+		response.Error(r, "Method Not Allowed", fasthttp.StatusMethodNotAllowed)
+	}
+
+	r.POST("/upload/{cid}", a.logger(a.tokenizer(a.tracer(a.reqNamespace(handler.Upload)))))
+	a.log.Info(logs.AddedPathUploadCid)
+	r.GET("/get/{cid}/{oid:*}", a.logger(a.tokenizer(a.tracer(a.reqNamespace(handler.DownloadByAddressOrBucketName)))))
+	r.HEAD("/get/{cid}/{oid:*}", a.logger(a.tokenizer(a.tracer(a.reqNamespace(handler.HeadByAddressOrBucketName)))))
+	a.log.Info(logs.AddedPathGetCidOid)
+	r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(a.tokenizer(a.tracer(a.reqNamespace(handler.DownloadByAttribute)))))
+	r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(a.tokenizer(a.tracer(a.reqNamespace(handler.HeadByAttribute)))))
+	a.log.Info(logs.AddedPathGetByAttributeCidAttrKeyAttrVal)
+	r.GET("/zip/{cid}/{prefix:*}", a.logger(a.tokenizer(a.tracer(a.reqNamespace(handler.DownloadZipped)))))
+	a.log.Info(logs.AddedPathZipCidPrefix)
+
+	a.webServer.Handler = r.Handler
+}
+
+func (a *app) logger(h fasthttp.RequestHandler) fasthttp.RequestHandler {
+	return func(req *fasthttp.RequestCtx) {
+		a.log.Info(logs.Request, zap.String("remote", req.RemoteAddr().String()),
+			zap.ByteString("method", req.Method()),
+			zap.ByteString("path", req.Path()),
+			zap.ByteString("query", req.QueryArgs().QueryString()),
+			zap.Uint64("id", req.ID()))
+		h(req)
+	}
+}
+
+func (a *app) tokenizer(h fasthttp.RequestHandler) fasthttp.RequestHandler {
+	return func(req *fasthttp.RequestCtx) {
+		appCtx, err := tokens.StoreBearerTokenAppCtx(a.ctx, req)
+		if err != nil {
+			a.log.Error(logs.CouldNotFetchAndStoreBearerToken, zap.Uint64("id", req.ID()), zap.Error(err))
+			response.Error(req, "could not fetch and store bearer token: "+err.Error(), fasthttp.StatusBadRequest)
+			return
+		}
+		utils.SetContextToRequest(appCtx, req)
+		h(req)
+	}
+}
+
+func (a *app) tracer(h fasthttp.RequestHandler) fasthttp.RequestHandler {
+	return func(req *fasthttp.RequestCtx) {
+		appCtx := utils.GetContextFromRequest(req)
+
+		appCtx, span := utils.StartHTTPServerSpan(appCtx, req, "REQUEST")
+		defer func() {
+			utils.SetHTTPTraceInfo(appCtx, span, req)
+			span.End()
+		}()
+
+		appCtx = treepool.SetRequestID(appCtx, strconv.FormatUint(req.ID(), 10))
+
+		utils.SetContextToRequest(appCtx, req)
+		h(req)
+	}
+}
+
+func (a *app) reqNamespace(h fasthttp.RequestHandler) fasthttp.RequestHandler {
+	return func(req *fasthttp.RequestCtx) {
+		appCtx := utils.GetContextFromRequest(req)
+
+		nsBytes := req.Request.Header.Peek(a.settings.NamespaceHeader())
+		appCtx = middleware.SetNamespace(appCtx, string(nsBytes))
+
+		utils.SetContextToRequest(appCtx, req)
+		h(req)
+	}
+}
+
+func (a *app) AppParams() *utils.AppParams {
+	return &utils.AppParams{
+		Logger:   a.log,
+		Pool:     a.pool,
+		Owner:    a.owner,
+		Resolver: a.resolver,
+		Cache:    cache.NewBucketCache(getCacheOptions(a.cfg, a.log)),
+	}
+}
+
+func (a *app) initServers(ctx context.Context) {
+	serversInfo := fetchServers(a.cfg, a.log)
+
+	a.servers = make([]Server, 0, len(serversInfo))
+	for _, serverInfo := range serversInfo {
+		fields := []zap.Field{
+			zap.String("address", serverInfo.Address), zap.Bool("tls enabled", serverInfo.TLS.Enabled),
+			zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile),
+		}
+		srv, err := newServer(ctx, serverInfo)
+		if err != nil {
+			a.unbindServers = append(a.unbindServers, serverInfo)
+			a.metrics.MarkUnhealthy(serverInfo.Address)
+			a.log.Warn(logs.FailedToAddServer, append(fields, zap.Error(err))...)
+			continue
+		}
+		a.metrics.MarkHealthy(serverInfo.Address)
+
+		a.servers = append(a.servers, srv)
+		a.log.Info(logs.AddServer, fields...)
+	}
+
+	if len(a.servers) == 0 {
+		a.log.Fatal(logs.NoHealthyServers)
+	}
+}
+
+func (a *app) updateServers() error {
+	serversInfo := fetchServers(a.cfg, a.log)
+
+	a.mu.Lock()
+	defer a.mu.Unlock()
+
+	var found bool
+	for _, serverInfo := range serversInfo {
+		ser := a.getServer(serverInfo.Address)
+		if ser != nil {
+			if serverInfo.TLS.Enabled {
+				if err := ser.UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
+					return fmt.Errorf("failed to update tls certs: %w", err)
+				}
+				found = true
+			}
+		} else if unbind := a.updateUnbindServerInfo(serverInfo); unbind {
+			found = true
+		}
+	}
+
+	if !found {
+		return fmt.Errorf("invalid servers configuration: no known server found")
+	}
+
+	return nil
+}
+
+func (a *app) getServers() []Server {
+	a.mu.RLock()
+	defer a.mu.RUnlock()
+	return a.servers
+}
+
+func (a *app) getServer(address string) Server {
+	for i := range a.servers {
+		if a.servers[i].Address() == address {
+			return a.servers[i]
+		}
+	}
+	return nil
+}
+
+func (a *app) updateUnbindServerInfo(info ServerInfo) bool {
+	for i := range a.unbindServers {
+		if a.unbindServers[i].Address == info.Address {
+			a.unbindServers[i] = info
+			return true
+		}
+	}
+	return false
+}
+
+func (a *app) initTracing(ctx context.Context) {
+	instanceID := ""
+	if len(a.servers) > 0 {
+		instanceID = a.servers[0].Address()
+	}
+	cfg := tracing.Config{
+		Enabled:    a.cfg.GetBool(cfgTracingEnabled),
+		Exporter:   tracing.Exporter(a.cfg.GetString(cfgTracingExporter)),
+		Endpoint:   a.cfg.GetString(cfgTracingEndpoint),
+		Service:    "frostfs-http-gw",
+		InstanceID: instanceID,
+		Version:    Version,
+	}
+	updated, err := tracing.Setup(ctx, cfg)
+	if err != nil {
+		a.log.Warn(logs.FailedToInitializeTracing, zap.Error(err))
+	}
+	if updated {
+		a.log.Info(logs.TracingConfigUpdated)
+	}
+}
+
+func (a *app) setRuntimeParameters() {
+	if len(os.Getenv("GOMEMLIMIT")) != 0 {
+		// default limit < yaml limit < app env limit < GOMEMLIMIT
+		a.log.Warn(logs.RuntimeSoftMemoryDefinedWithGOMEMLIMIT)
+		return
+	}
+
+	softMemoryLimit := fetchSoftMemoryLimit(a.cfg)
+	previous := debug.SetMemoryLimit(softMemoryLimit)
+	if softMemoryLimit != previous {
+		a.log.Info(logs.RuntimeSoftMemoryLimitUpdated,
+			zap.Int64("new_value", softMemoryLimit),
+			zap.Int64("old_value", previous))
+	}
+}
+
+func (s *appSettings) NamespaceHeader() string {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.namespaceHeader
+}
+
+func (s *appSettings) setNamespaceHeader(nsHeader string) {
+	s.mu.Lock()
+	s.namespaceHeader = nsHeader
+	s.mu.Unlock()
+}
+
+func (s *appSettings) FormContainerZone(ns string) (zone string, isDefault bool) {
+	s.mu.RLock()
+	namespaces := s.defaultNamespaces
+	s.mu.RUnlock()
+	if slices.Contains(namespaces, ns) {
+		return v2container.SysAttributeZoneDefault, true
+	}
+
+	return ns + ".ns", false
+}
+
+func (s *appSettings) setDefaultNamespaces(namespaces []string) {
+	for i := range namespaces { // to be set namespaces in env variable as `HTTP_GW_RESOLVE_BUCKET_DEFAULT_NAMESPACES="" "root"`
+		namespaces[i] = strings.Trim(namespaces[i], "\"")
+	}
+
+	s.mu.Lock()
+	s.defaultNamespaces = namespaces
+	s.mu.Unlock()
+}
+
+func (a *app) scheduleReconnect(ctx context.Context, srv *fasthttp.Server) {
+	go func() {
+		t := time.NewTicker(a.settings.reconnectInterval)
+		defer t.Stop()
+		for {
+			select {
+			case <-t.C:
+				if a.tryReconnect(ctx, srv) {
+					return
+				}
+				t.Reset(a.settings.reconnectInterval)
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+}
+
+func (a *app) tryReconnect(ctx context.Context, sr *fasthttp.Server) bool {
+	a.mu.Lock()
+	defer a.mu.Unlock()
+
+	a.log.Info(logs.ServerReconnecting)
+	var failedServers []ServerInfo
+
+	for _, serverInfo := range a.unbindServers {
+		fields := []zap.Field{
+			zap.String("address", serverInfo.Address), zap.Bool("tls enabled", serverInfo.TLS.Enabled),
+			zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile),
+		}
+
+		srv, err := newServer(ctx, serverInfo)
+		if err != nil {
+			a.log.Warn(logs.ServerReconnectFailed, zap.Error(err))
+			failedServers = append(failedServers, serverInfo)
+			a.metrics.MarkUnhealthy(serverInfo.Address)
+			continue
+		}
+
+		go func() {
+			a.log.Info(logs.StartingServer, zap.String("address", srv.Address()))
+			a.metrics.MarkHealthy(serverInfo.Address)
+			if err = sr.Serve(srv.Listener()); err != nil && !errors.Is(err, http.ErrServerClosed) {
+				a.log.Warn(logs.ListenAndServe, zap.Error(err))
+				a.metrics.MarkUnhealthy(serverInfo.Address)
+			}
+		}()
+
+		a.servers = append(a.servers, srv)
+		a.log.Info(logs.ServerReconnectedSuccessfully, fields...)
+	}
+
+	a.unbindServers = failedServers
+
+	return len(a.unbindServers) == 0
+}

cmd/http-gw/integration_test.go

@@ -29,6 +29,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"github.com/testcontainers/testcontainers-go"
 	"github.com/testcontainers/testcontainers-go/wait"
+	"go.uber.org/zap/zapcore"
 )
 
 type putResponse struct {
@@ -46,7 +47,7 @@ func TestIntegration(t *testing.T) {
 	rootCtx := context.Background()
 	aioImage := "truecloudlab/frostfs-aio:"
 	versions := []string{
-		"1.2.5", // frostfs-storage v0.36.0 RC
+		"1.2.7", // frostfs-storage v0.36.0 RC
 	}
 	key, err := keys.NewPrivateKeyFromHex("1dd37fba80fec4e6a6f13fd708d8dcb3b29def768017052f6c930fa1c5d90bbb")
 	require.NoError(t, err)
@@ -68,6 +69,7 @@ func TestIntegration(t *testing.T) {
 		t.Run("simple get "+version, func(t *testing.T) { simpleGet(ctx, t, clientPool, ownerID, CID, version) })
 		t.Run("get by attribute "+version, func(t *testing.T) { getByAttr(ctx, t, clientPool, ownerID, CID, version) })
 		t.Run("get zip "+version, func(t *testing.T) { getZip(ctx, t, clientPool, ownerID, CID, version) })
+		t.Run("test namespaces "+version, func(t *testing.T) { checkNamespaces(ctx, t, clientPool, ownerID, CID, version) })
 
 		cancel()
 		server.Wait()
@@ -81,9 +83,9 @@ func runServer() (App, context.CancelFunc) {
 	cancelCtx, cancel := context.WithCancel(context.Background())
 
 	v := getDefaultConfig()
-	l, lvl := newLogger(v)
+	l, lvl := newStdoutLogger(zapcore.DebugLevel)
 	application := newApp(cancelCtx, WithConfig(v), WithLogger(l, lvl))
-	go application.Serve(cancelCtx)
+	go application.Serve()
 
 	return application, cancel
 }
@@ -338,6 +340,40 @@ func checkZip(t *testing.T, data []byte, length int64, names, contents []string)
 	}
 }
 
+func checkNamespaces(ctx context.Context, t *testing.T, clientPool *pool.Pool, ownerID user.ID, CID cid.ID, version string) {
+	content := "content of file"
+	attributes := map[string]string{
+		"some-attr": "some-get-value",
+	}
+
+	id := putObject(ctx, t, clientPool, ownerID, CID, content, attributes)
+
+	req, err := http.NewRequest(http.MethodGet, testHost+"/get/"+testContainerName+"/"+id.String(), nil)
+	require.NoError(t, err)
+	req.Header.Set(defaultNamespaceHeader, "")
+
+	resp, err := http.DefaultClient.Do(req)
+	require.NoError(t, err)
+	checkGetResponse(t, resp, content, attributes)
+
+	req, err = http.NewRequest(http.MethodGet, testHost+"/get/"+testContainerName+"/"+id.String(), nil)
+	require.NoError(t, err)
+	req.Header.Set(defaultNamespaceHeader, "root")
+
+	resp, err = http.DefaultClient.Do(req)
+	require.NoError(t, err)
+	checkGetResponse(t, resp, content, attributes)
+
+	req, err = http.NewRequest(http.MethodGet, testHost+"/get/"+testContainerName+"/"+id.String(), nil)
+	require.NoError(t, err)
+	req.Header.Set(defaultNamespaceHeader, "root2")
+
+	resp, err = http.DefaultClient.Do(req)
+	require.NoError(t, err)
+	require.Equal(t, http.StatusNotFound, resp.StatusCode)
+
+}
+
 func createDockerContainer(ctx context.Context, t *testing.T, image string) testcontainers.Container {
 	req := testcontainers.ContainerRequest{
 		Image:       image,

cmd/http-gw/main.go

@@ -9,9 +9,9 @@ import (
 func main() {
 	globalContext, _ := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
 	v := settings()
-	logger, atomicLevel := newLogger(v)
+	logger, atomicLevel := pickLogger(v)
 
 	application := newApp(globalContext, WithLogger(logger, atomicLevel), WithConfig(v))
-	go application.Serve(globalContext)
+	go application.Serve()
 	application.Wait()
 }

cmd/http-gw/server.go

@@ -68,11 +68,13 @@ func newServer(ctx context.Context, serverInfo ServerInfo) (*server, error) {
 
 	if serverInfo.TLS.Enabled {
 		if err = tlsProvider.UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
-			return nil, fmt.Errorf("failed to update cert: %w", err)
+			lnErr := ln.Close()
+			return nil, fmt.Errorf("failed to update cert (listener close: %v): %w", lnErr, err)
 		}
 
 		ln = tls.NewListener(ln, &tls.Config{
 			GetCertificate: tlsProvider.GetCertificate,
+			NextProtos:     []string{"h2"}, // required to enable HTTP/2 requests in `http.Serve`
 		})
 	}
 

cmd/http-gw/server_test.go

@@ -0,0 +1,119 @@
+package main
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/tls"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"fmt"
+	"math/big"
+	"net"
+	"net/http"
+	"os"
+	"path"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+	"golang.org/x/net/http2"
+)
+
+const (
+	expHeaderKey   = "Foo"
+	expHeaderValue = "Bar"
+)
+
+func TestHTTP2TLS(t *testing.T) {
+	ctx := context.Background()
+	certPath, keyPath := prepareTestCerts(t)
+
+	srv := &http.Server{
+		Handler: http.HandlerFunc(testHandler),
+	}
+
+	tlsListener, err := newServer(ctx, ServerInfo{
+		Address: ":0",
+		TLS: ServerTLSInfo{
+			Enabled:  true,
+			CertFile: certPath,
+			KeyFile:  keyPath,
+		},
+	})
+	require.NoError(t, err)
+	port := tlsListener.Listener().Addr().(*net.TCPAddr).Port
+	addr := fmt.Sprintf("https://localhost:%d", port)
+
+	go func() {
+		_ = srv.Serve(tlsListener.Listener())
+	}()
+
+	// Server is running, now send HTTP/2 request
+
+	tlsClientConfig := &tls.Config{
+		InsecureSkipVerify: true,
+	}
+
+	cliHTTP1 := http.Client{Transport: &http.Transport{TLSClientConfig: tlsClientConfig}}
+	cliHTTP2 := http.Client{Transport: &http2.Transport{TLSClientConfig: tlsClientConfig}}
+
+	req, err := http.NewRequest("GET", addr, nil)
+	require.NoError(t, err)
+	req.Header[expHeaderKey] = []string{expHeaderValue}
+
+	resp, err := cliHTTP1.Do(req)
+	require.NoError(t, err)
+	require.Equal(t, http.StatusOK, resp.StatusCode)
+
+	resp, err = cliHTTP2.Do(req)
+	require.NoError(t, err)
+	require.Equal(t, http.StatusOK, resp.StatusCode)
+}
+
+func testHandler(resp http.ResponseWriter, req *http.Request) {
+	hdr, ok := req.Header[expHeaderKey]
+	if !ok || len(hdr) != 1 || hdr[0] != expHeaderValue {
+		resp.WriteHeader(http.StatusBadRequest)
+	} else {
+		resp.WriteHeader(http.StatusOK)
+	}
+}
+
+func prepareTestCerts(t *testing.T) (certPath, keyPath string) {
+	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
+	require.NoError(t, err)
+
+	template := x509.Certificate{
+		SerialNumber:          big.NewInt(1),
+		Subject:               pkix.Name{CommonName: "localhost"},
+		NotBefore:             time.Now(),
+		NotAfter:              time.Now().Add(time.Hour * 24 * 365),
+		KeyUsage:              x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
+		BasicConstraintsValid: true,
+	}
+
+	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &privateKey.PublicKey, privateKey)
+	require.NoError(t, err)
+
+	dir := t.TempDir()
+	certPath = path.Join(dir, "cert.pem")
+	keyPath = path.Join(dir, "key.pem")
+
+	certFile, err := os.Create(certPath)
+	require.NoError(t, err)
+	defer certFile.Close()
+
+	keyFile, err := os.Create(keyPath)
+	require.NoError(t, err)
+	defer keyFile.Close()
+
+	err = pem.Encode(certFile, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
+	require.NoError(t, err)
+
+	err = pem.Encode(keyFile, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(privateKey)})
+	require.NoError(t, err)
+
+	return certPath, keyPath
+}

cmd/http-gw/settings.go

@@ -1,7 +1,10 @@
 package main
 
 import (
+	"context"
+	"encoding/hex"
 	"fmt"
+	"math"
 	"os"
 	"path"
 	"runtime"
@@ -10,12 +13,26 @@ import (
 	"strings"
 	"time"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
+	grpctracing "git.frostfs.info/TrueCloudLab/frostfs-observability/tracing/grpc"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	treepool "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree"
+	"git.frostfs.info/TrueCloudLab/zapjournald"
+	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/spf13/pflag"
 	"github.com/spf13/viper"
+	"github.com/ssgreg/journald"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
+	"google.golang.org/grpc"
+)
+
+const (
+	destinationStdout   = "stdout"
+	destinationJournald = "journald"
 )
 
 const (
@@ -28,11 +45,21 @@ const (
 
 	defaultPoolErrorThreshold uint32 = 100
 
+	defaultSoftMemoryLimit = math.MaxInt64
+
+	defaultBufferMaxSizeForPut = 1024 * 1024 // 1mb
+
+	defaultNamespaceHeader = "X-Frostfs-Namespace"
+
+	defaultReconnectInterval = time.Minute
+
 	cfgServer      = "server"
 	cfgTLSEnabled  = "tls.enabled"
 	cfgTLSCertFile = "tls.cert_file"
 	cfgTLSKeyFile  = "tls.key_file"
 
+	cfgReconnectInterval = "reconnect_interval"
+
 	// Web.
 	cfgWebReadBufferSize     = "web.read_buffer_size"
 	cfgWebWriteBufferSize    = "web.write_buffer_size"
@@ -47,6 +74,11 @@ const (
 	cfgPprofEnabled      = "pprof.enabled"
 	cfgPprofAddress      = "pprof.address"
 
+	// Tracing ...
+	cfgTracingEnabled  = "tracing.enabled"
+	cfgTracingExporter = "tracing.exporter"
+	cfgTracingEndpoint = "tracing.endpoint"
+
 	// Pool config.
 	cfgConTimeout         = "connect_timeout"
 	cfgStreamTimeout      = "stream_timeout"
@@ -56,6 +88,7 @@ const (
 
 	// Logger.
 	cfgLoggerLevel       = "logger.level"
+	cfgLoggerDestination = "logger.destination"
 
 	// Wallet.
 	cfgWalletPassphrase = "wallet.passphrase"
@@ -77,6 +110,25 @@ const (
 	// Zip compression.
 	cfgZipCompression = "zip.compression"
 
+	// Runtime.
+	cfgSoftMemoryLimit = "runtime.soft_memory_limit"
+
+	// Enabling client side object preparing for PUT operations.
+	cfgClientCut = "frostfs.client_cut"
+	// Sets max buffer size for read payload in put operations.
+	cfgBufferMaxSizeForPut = "frostfs.buffer_max_size_for_put"
+	// Configuration of parameters of requests to FrostFS.
+	// Sets max attempt to make successful tree request.
+	cfgTreePoolMaxAttempts = "frostfs.tree_pool_max_attempts"
+
+	// Caching.
+	cfgBucketsCacheLifetime = "cache.buckets.lifetime"
+	cfgBucketsCacheSize     = "cache.buckets.size"
+
+	// Bucket resolving options.
+	cfgResolveNamespaceHeader   = "resolve_bucket.namespace_header"
+	cfgResolveDefaultNamespaces = "resolve_bucket.default_namespaces"
+
 	// Command line args.
 	cmdHelp          = "help"
 	cmdVersion       = "version"
@@ -134,10 +186,14 @@ func settings() *viper.Viper {
 
 	// logger:
 	v.SetDefault(cfgLoggerLevel, "debug")
+	v.SetDefault(cfgLoggerDestination, "stdout")
 
 	// pool:
 	v.SetDefault(cfgPoolErrorThreshold, defaultPoolErrorThreshold)
 
+	// frostfs:
+	v.SetDefault(cfgBufferMaxSizeForPut, defaultBufferMaxSizeForPut)
+
 	// web-server:
 	v.SetDefault(cfgWebReadBufferSize, 4096)
 	v.SetDefault(cfgWebWriteBufferSize, 4096)
@@ -156,6 +212,10 @@ func settings() *viper.Viper {
 	v.SetDefault(cfgPprofAddress, "localhost:8083")
 	v.SetDefault(cfgPrometheusAddress, "localhost:8084")
 
+	// resolve bucket
+	v.SetDefault(cfgResolveNamespaceHeader, defaultNamespaceHeader)
+	v.SetDefault(cfgResolveDefaultNamespaces, []string{"", "root"})
+
 	// Binding flags
 	if err := v.BindPFlag(cfgPprofEnabled, flags.Lookup(cmdPprof)); err != nil {
 		panic(err)
@@ -312,14 +372,28 @@ func mergeConfig(v *viper.Viper, fileName string) error {
 		}
 	}()
 
-	if err = v.MergeConfig(cfgFile); err != nil {
-		return err
+	return v.MergeConfig(cfgFile)
 }
 
-	return nil
+func pickLogger(v *viper.Viper) (*zap.Logger, zap.AtomicLevel) {
+	lvl, err := getLogLevel(v)
+	if err != nil {
+		panic(err)
 	}
 
-// newLogger constructs a zap.Logger instance for current application.
+	dest := v.GetString(cfgLoggerDestination)
+
+	switch dest {
+	case destinationStdout:
+		return newStdoutLogger(lvl)
+	case destinationJournald:
+		return newJournaldLogger(lvl)
+	default:
+		panic(fmt.Sprintf("wrong destination for logger: %s", dest))
+	}
+}
+
+// newStdoutLogger constructs a zap.Logger instance for current application.
 // Panics on failure.
 //
 // Logger is built from zap's production logging configuration with:
@@ -330,12 +404,7 @@ func mergeConfig(v *viper.Viper, fileName string) error {
 // Logger records a stack trace for all messages at or above fatal level.
 //
 // See also zapcore.Level, zap.NewProductionConfig, zap.AddStacktrace.
-func newLogger(v *viper.Viper) (*zap.Logger, zap.AtomicLevel) {
-	lvl, err := getLogLevel(v)
-	if err != nil {
-		panic(err)
-	}
-
+func newStdoutLogger(lvl zapcore.Level) (*zap.Logger, zap.AtomicLevel) {
 	c := zap.NewProductionConfig()
 	c.Level = zap.NewAtomicLevelAt(lvl)
 	c.Encoding = "console"
@@ -351,6 +420,25 @@ func newLogger(v *viper.Viper) (*zap.Logger, zap.AtomicLevel) {
 	return l, c.Level
 }
 
+func newJournaldLogger(lvl zapcore.Level) (*zap.Logger, zap.AtomicLevel) {
+	c := zap.NewProductionConfig()
+	c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
+	c.Level = zap.NewAtomicLevelAt(lvl)
+
+	encoder := zapjournald.NewPartialEncoder(zapcore.NewConsoleEncoder(c.EncoderConfig), zapjournald.SyslogFields)
+
+	core := zapjournald.NewCore(c.Level, encoder, &journald.Journal{}, zapjournald.SyslogFields)
+	coreWithContext := core.With([]zapcore.Field{
+		zapjournald.SyslogFacility(zapjournald.LogDaemon),
+		zapjournald.SyslogIdentifier(),
+		zapjournald.SyslogPid(),
+	})
+
+	l := zap.New(coreWithContext, zap.AddStacktrace(zap.NewAtomicLevelAt(zap.FatalLevel)))
+
+	return l, c.Level
+}
+
 func getLogLevel(v *viper.Viper) (zapcore.Level, error) {
 	var lvl zapcore.Level
 	lvlStr := v.GetString(cfgLoggerLevel)
@@ -370,8 +458,18 @@ func getLogLevel(v *viper.Viper) (zapcore.Level, error) {
 	return lvl, nil
 }
 
-func fetchServers(v *viper.Viper) []ServerInfo {
+func fetchReconnectInterval(cfg *viper.Viper) time.Duration {
+	reconnect := cfg.GetDuration(cfgReconnectInterval)
+	if reconnect <= 0 {
+		reconnect = defaultReconnectInterval
+	}
+
+	return reconnect
+}
+
+func fetchServers(v *viper.Viper, log *zap.Logger) []ServerInfo {
 	var servers []ServerInfo
+	seen := make(map[string]struct{})
 
 	for i := 0; ; i++ {
 		key := cfgServer + "." + strconv.Itoa(i) + "."
@@ -386,8 +484,181 @@ func fetchServers(v *viper.Viper) []ServerInfo {
 			break
 		}
 
+		if _, ok := seen[serverInfo.Address]; ok {
+			log.Warn(logs.WarnDuplicateAddress, zap.String("address", serverInfo.Address))
+			continue
+		}
+		seen[serverInfo.Address] = struct{}{}
 		servers = append(servers, serverInfo)
 	}
 
 	return servers
 }
+
+func getPools(ctx context.Context, logger *zap.Logger, cfg *viper.Viper) (*pool.Pool, *treepool.Pool, *keys.PrivateKey) {
+	key, err := getFrostFSKey(cfg, logger)
+	if err != nil {
+		logger.Fatal(logs.CouldNotLoadFrostFSPrivateKey, zap.Error(err))
+	}
+
+	var prm pool.InitParameters
+	var prmTree treepool.InitParameters
+
+	prm.SetKey(&key.PrivateKey)
+	prmTree.SetKey(key)
+	logger.Info(logs.UsingCredentials, zap.String("FrostFS", hex.EncodeToString(key.PublicKey().Bytes())))
+
+	for _, peer := range fetchPeers(logger, cfg) {
+		prm.AddNode(peer)
+		prmTree.AddNode(peer)
+	}
+
+	connTimeout := cfg.GetDuration(cfgConTimeout)
+	if connTimeout <= 0 {
+		connTimeout = defaultConnectTimeout
+	}
+	prm.SetNodeDialTimeout(connTimeout)
+	prmTree.SetNodeDialTimeout(connTimeout)
+
+	streamTimeout := cfg.GetDuration(cfgStreamTimeout)
+	if streamTimeout <= 0 {
+		streamTimeout = defaultStreamTimeout
+	}
+	prm.SetNodeStreamTimeout(streamTimeout)
+	prmTree.SetNodeStreamTimeout(streamTimeout)
+
+	healthCheckTimeout := cfg.GetDuration(cfgReqTimeout)
+	if healthCheckTimeout <= 0 {
+		healthCheckTimeout = defaultRequestTimeout
+	}
+	prm.SetHealthcheckTimeout(healthCheckTimeout)
+	prmTree.SetHealthcheckTimeout(healthCheckTimeout)
+
+	rebalanceInterval := cfg.GetDuration(cfgRebalance)
+	if rebalanceInterval <= 0 {
+		rebalanceInterval = defaultRebalanceTimer
+	}
+	prm.SetClientRebalanceInterval(rebalanceInterval)
+	prmTree.SetClientRebalanceInterval(rebalanceInterval)
+
+	errorThreshold := cfg.GetUint32(cfgPoolErrorThreshold)
+	if errorThreshold <= 0 {
+		errorThreshold = defaultPoolErrorThreshold
+	}
+	prm.SetErrorThreshold(errorThreshold)
+	prm.SetLogger(logger)
+	prmTree.SetLogger(logger)
+
+	prmTree.SetMaxRequestAttempts(cfg.GetInt(cfgTreePoolMaxAttempts))
+
+	var apiGRPCDialOpts []grpc.DialOption
+	var treeGRPCDialOpts []grpc.DialOption
+	if cfg.GetBool(cfgTracingEnabled) {
+		interceptors := []grpc.DialOption{
+			grpc.WithUnaryInterceptor(grpctracing.NewUnaryClientInteceptor()),
+			grpc.WithStreamInterceptor(grpctracing.NewStreamClientInterceptor()),
+		}
+		treeGRPCDialOpts = append(treeGRPCDialOpts, interceptors...)
+		apiGRPCDialOpts = append(apiGRPCDialOpts, interceptors...)
+	}
+	prm.SetGRPCDialOptions(apiGRPCDialOpts...)
+	prmTree.SetGRPCDialOptions(treeGRPCDialOpts...)
+
+	p, err := pool.NewPool(prm)
+	if err != nil {
+		logger.Fatal(logs.FailedToCreateConnectionPool, zap.Error(err))
+	}
+
+	if err = p.Dial(ctx); err != nil {
+		logger.Fatal(logs.FailedToDialConnectionPool, zap.Error(err))
+	}
+
+	treePool, err := treepool.NewPool(prmTree)
+	if err != nil {
+		logger.Fatal(logs.FailedToCreateTreePool, zap.Error(err))
+	}
+	if err = treePool.Dial(ctx); err != nil {
+		logger.Fatal(logs.FailedToDialTreePool, zap.Error(err))
+	}
+
+	return p, treePool, key
+}
+
+func fetchPeers(l *zap.Logger, v *viper.Viper) []pool.NodeParam {
+	var nodes []pool.NodeParam
+	for i := 0; ; i++ {
+		key := cfgPeers + "." + strconv.Itoa(i) + "."
+		address := v.GetString(key + "address")
+		weight := v.GetFloat64(key + "weight")
+		priority := v.GetInt(key + "priority")
+
+		if address == "" {
+			break
+		}
+		if weight <= 0 { // unspecified or wrong
+			weight = 1
+		}
+		if priority <= 0 { // unspecified or wrong
+			priority = 1
+		}
+
+		nodes = append(nodes, pool.NewNodeParam(priority, address, weight))
+
+		l.Info(logs.AddedStoragePeer,
+			zap.Int("priority", priority),
+			zap.String("address", address),
+			zap.Float64("weight", weight))
+	}
+
+	return nodes
+}
+
+func fetchSoftMemoryLimit(cfg *viper.Viper) int64 {
+	softMemoryLimit := cfg.GetSizeInBytes(cfgSoftMemoryLimit)
+	if softMemoryLimit <= 0 {
+		softMemoryLimit = defaultSoftMemoryLimit
+	}
+
+	return int64(softMemoryLimit)
+}
+
+func getCacheOptions(v *viper.Viper, l *zap.Logger) *cache.Config {
+	cacheCfg := cache.DefaultBucketConfig(l)
+
+	cacheCfg.Lifetime = fetchCacheLifetime(v, l, cfgBucketsCacheLifetime, cacheCfg.Lifetime)
+	cacheCfg.Size = fetchCacheSize(v, l, cfgBucketsCacheSize, cacheCfg.Size)
+
+	return cacheCfg
+}
+
+func fetchCacheLifetime(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue time.Duration) time.Duration {
+	if v.IsSet(cfgEntry) {
+		lifetime := v.GetDuration(cfgEntry)
+		if lifetime <= 0 {
+			l.Error(logs.InvalidLifetimeUsingDefaultValue,
+				zap.String("parameter", cfgEntry),
+				zap.Duration("value in config", lifetime),
+				zap.Duration("default", defaultValue))
+		} else {
+			return lifetime
+		}
+	}
+
+	return defaultValue
+}
+
+func fetchCacheSize(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue int) int {
+	if v.IsSet(cfgEntry) {
+		size := v.GetInt(cfgEntry)
+		if size <= 0 {
+			l.Error(logs.InvalidCacheSizeUsingDefaultValue,
+				zap.String("parameter", cfgEntry),
+				zap.Int("value in config", size),
+				zap.Int("default", defaultValue))
+		} else {
+			return size
+		}
+	}
+
+	return defaultValue
+}

config/config.env

@@ -26,6 +26,9 @@ HTTP_GW_SERVER_1_TLS_ENABLED=true
 HTTP_GW_SERVER_1_TLS_CERT_FILE=/path/to/tls/cert
 HTTP_GW_SERVER_1_TLS_KEY_FILE=/path/to/tls/key
 
+# How often to reconnect to the servers
+HTTP_GW_RECONNECT_INTERVAL: 1m
+
 # Nodes configuration.
 # This configuration make the gateway use the first node (grpc://s01.frostfs.devenv:8080)
 # while it's healthy. Otherwise, the gateway use the second node (grpc://s01.frostfs.devenv:8080)
@@ -92,3 +95,29 @@ HTTP_GW_POOL_ERROR_THRESHOLD=100
 
 # Enable zip compression to download files by common prefix.
 HTTP_GW_ZIP_COMPRESSION=false
+
+HTTP_GW_TRACING_ENABLED=true
+HTTP_GW_TRACING_ENDPOINT="localhost:4317"
+HTTP_GW_TRACING_EXPORTER="otlp_grpc"
+
+HTTP_GW_RUNTIME_SOFT_MEMORY_LIMIT=1073741824
+
+# Parameters of requests to FrostFS
+# This flag enables client side object preparing.
+HTTP_GW_FROSTFS_CLIENT_CUT=false
+# Sets max buffer size for read payload in put operations.
+HTTP_GW_FROSTFS_BUFFER_MAX_SIZE_FOR_PUT=1048576
+
+# Caching
+# Cache which contains mapping of bucket name to bucket info
+HTTP_GW_CACHE_BUCKETS_LIFETIME=1m
+HTTP_GW_CACHE_BUCKETS_SIZE=1000
+
+# Header to determine zone to resolve bucket name
+HTTP_GW_RESOLVE_BUCKET_NAMESPACE_HEADER=X-Frostfs-Namespace
+# Namespaces that should be handled as default
+HTTP_GW_RESOLVE_BUCKET_DEFAULT_NAMESPACES="" "root"
+
+# Max attempt to make successful tree request.
+# default value is 0 that means the number of attempts equals to number of nodes in pool.
+HTTP_GW_FROSTFS_TREE_POOL_MAX_ATTEMPTS=0

config/config.yaml

@@ -9,9 +9,14 @@ pprof:
 prometheus:
   enabled: false # Enable metrics.
   address: localhost:8084
+tracing:
+  enabled: true
+  exporter: "otlp_grpc"
+  endpoint: "localhost:4317"
 
 logger:
   level: debug # Log level.
+  destination: stdout
 
 server:
   - address: 0.0.0.0:8080
@@ -50,6 +55,7 @@ peers:
     priority: 2
     weight: 9
 
+reconnect_interval: 1m
 
 web:
   # Per-connection buffer size for requests' reading.
@@ -97,3 +103,27 @@ pool_error_threshold: 100 # The number of errors on connection after which node
 
 zip:
   compression: false # Enable zip compression to download files by common prefix.
+
+runtime:
+  soft_memory_limit: 1gb
+
+# Parameters of requests to FrostFS
+frostfs:
+  # This flag enables client side object preparing.
+  client_cut: false
+  # Sets max buffer size for read payload in put operations.
+  buffer_max_size_for_put: 1048576
+  # Max attempt to make successful tree request.
+  # default value is 0 that means the number of attempts equals to number of nodes in pool.
+  tree_pool_max_attempts: 0
+
+# Caching
+cache:
+  # Cache which contains mapping of bucket name to bucket info
+  buckets:
+    lifetime: 1m
+    size: 1000
+
+resolve_bucket:
+  namespace_header: X-Frostfs-Namespace
+  default_namespaces: [ "", "root" ]

debian/frostfs-http-gw.postinst

@@ -21,7 +21,7 @@ set -e
 case "$1" in
     configure)
         USERNAME=http
-        id -u frostfs-$USERNAME >/dev/null 2>&1 || useradd -s /usr/sbin/nologin -d /srv/frostfs_cache --system -M -U -c "FrostFS HTTP gateway" frostfs-$USERNAME
+        id -u frostfs-$USERNAME >/dev/null 2>&1 || useradd -s /usr/sbin/nologin -d /var/lib/frostfs/$USERNAME --system -m -U -c "FrostFS HTTP gateway" frostfs-$USERNAME
         if ! dpkg-statoverride --list /etc/frostfs/$USERNAME >/dev/null; then
             chown -f root:frostfs-$USERNAME /etc/frostfs/$USERNAME
             chown -f root:frostfs-$USERNAME /etc/frostfs/$USERNAME/config.yaml || true
@@ -29,7 +29,7 @@ case "$1" in
             chmod -f 0640 /etc/frostfs/$USERNAME/config.yaml || true
         fi
         USERDIR=$(getent passwd "frostfs-$USERNAME" | cut -d: -f6)
-        if ! dpkg-statoverride --list frostfs-"$USERDIR" >/dev/null; then
+        if ! dpkg-statoverride --list "$USERDIR" >/dev/null; then
             chown -f frostfs-$USERNAME: "$USERDIR"
         fi
     ;;

docs/gate-configuration.md

@@ -41,7 +41,7 @@ $ cat http.log
 # Structure
 
 | Section          | Description                                                    |
-|-----------------|-------------------------------------------------------|
+|------------------|----------------------------------------------------------------|
 | no section       | [General parameters](#general-section)                         |
 | `wallet`         | [Wallet configuration](#wallet-section)                        |
 | `peers`          | [Nodes configuration](#peers-section)                          |
@@ -52,6 +52,11 @@ $ cat http.log
 | `zip`            | [ZIP configuration](#zip-section)                              |
 | `pprof`          | [Pprof configuration](#pprof-section)                          |
 | `prometheus`     | [Prometheus configuration](#prometheus-section)                |
+| `tracing`        | [Tracing configuration](#tracing-section)                      |
+| `runtime`        | [Runtime configuration](#runtime-section)                      |
+| `frostfs`        | [Frostfs configuration](#frostfs-section)                      |
+| `cache`          | [Cache configuration](#cache-section)                          |
+| `resolve_bucket` | [Bucket name resolving configuration](#resolve_bucket-section) |
 
 
 # General section
@@ -67,6 +72,7 @@ stream_timeout: 10s
 request_timeout: 5s
 rebalance_timer: 30s
 pool_error_threshold: 100
+reconnect_interval: 1m
 ```
 
 | Parameter              | Type       | SIGHUP reload | Default value  | Description                                                                        |
@@ -78,6 +84,7 @@ pool_error_threshold: 100
 | `request_timeout`      | `duration` |               | `15s`          | Timeout to check node health during rebalance.                                     |
 | `rebalance_timer`      | `duration` |               | `60s`          | Interval to check node health.                                                     |
 | `pool_error_threshold` | `uint32`   |               | `100`          | The number of errors on connection after which node is considered as unhealthy.    |
+| `reconnect_interval`   | `duration` | no            | `1m`           | Listeners reconnection interval.                                                   |
 
 # `wallet` section
 
@@ -156,12 +163,13 @@ server:
 ```yaml
 logger:
   level: debug
+  destination: stdout
 ```
 
 | Parameter     | Type     | SIGHUP reload | Default value | Description                                                                                        |
-|-----------|----------|---------------|---------------|----------------------------------------------------------------------------------------------------|
+|---------------|----------|---------------|---------------|----------------------------------------------------------------------------------------------------|
 | `level`       | `string` | yes           | `debug`       | Logging level.<br/>Possible values:  `debug`, `info`, `warn`, `error`, `dpanic`, `panic`, `fatal`. |
-
+| `destination` | `string` | no            | `stdout`      | Destination for logger: `stdout` or `journald`                                                     |
 
 # `web` section
 
@@ -238,3 +246,93 @@ prometheus:
 |-----------|----------|---------------|------------------|-----------------------------------------|
 | `enabled` | `bool`   | yes           | `false`          | Flag to enable the service.             |
 | `address` | `string` | yes           | `localhost:8084` | Address that service listener binds to. |
+
+# `tracing` section
+
+Contains configuration for the `tracing` service.
+
+```yaml
+tracing:
+  enabled: true
+  exporter: "otlp_grpc"
+  endpoint: "localhost:4317"
+```
+
+| Parameter  | Type     | SIGHUP reload | Default value    | Description                                                   |
+|------------|----------|---------------|------------------|---------------------------------------------------------------|
+| `enabled`  | `bool`   | yes           | `false`          | Flag to enable the tracing.                                   |
+| `exporter` | `string` | yes           |                  | Trace collector type (`stdout` or `otlp_grpc` are supported). |
+| `endpoint` | `string` | yes           |                  | Address of collector endpoint for OTLP exporters.             |
+
+# `runtime` section
+Contains runtime parameters.
+
+```yaml
+runtime:
+  soft_memory_limit: 1gb
+```
+
+| Parameter           | Type   | SIGHUP reload | Default value | Description                                                                                                                                                                  |
+|---------------------|--------|---------------|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `soft_memory_limit` | `size` | yes           | maxint64      | Soft memory limit for the runtime. Zero or no value stands for no limit. If `GOMEMLIMIT` environment variable is set, the value from the configuration file will be ignored. |
+
+# `frostfs` section
+
+Contains parameters of requests to FrostFS.
+
+```yaml
+frostfs:
+  client_cut: false
+  buffer_max_size_for_put: 1048576 # 1mb
+  tree_pool_max_attempts: 0
+```
+
+| Parameter                 | Type     | SIGHUP reload | Default value | Description                                                                                                               |
+|---------------------------|----------|---------------|---------------|---------------------------------------------------------------------------------------------------------------------------|
+| `client_cut`              | `bool`   | yes           | `false`       | This flag enables client side object preparing.                                                                           |
+| `buffer_max_size_for_put` | `uint64` | yes           | `1048576`     | Sets max buffer size for read payload in put operations.                                                                  |
+| `tree_pool_max_attempts`  | `uint32` | no            | `0`           | Sets max attempt to make successful tree request. Value 0 means the number of attempts equals to number of nodes in pool. |
+
+
+### `cache` section
+
+```yaml
+cache:
+  buckets:
+    lifetime: 1m
+    size: 1000
+
+```
+
+| Parameter       | Type                              | Default value                     | Description                                                                            |
+|-----------------|-----------------------------------|-----------------------------------|----------------------------------------------------------------------------------------|
+| `buckets`       | [Cache config](#cache-subsection) | `lifetime: 60s`<br>`size: 1000`   | Cache which contains mapping of bucket name to bucket info.                            |
+
+
+#### `cache` subsection
+
+```yaml
+lifetime: 1m
+size: 1000
+```
+
+| Parameter  | Type       | Default value    | Description                   |
+|------------|------------|------------------|-------------------------------|
+| `lifetime` | `duration` | depends on cache | Lifetime of entries in cache. |
+| `size`     | `int`      | depends on cache | LRU cache size.               |
+
+
+# `resolve_bucket` section
+
+Bucket name resolving parameters from and to container ID.
+
+```yaml
+resolve_bucket:
+  namespace_header: X-Frostfs-Namespace
+  default_namespaces: [ "", "root" ]
+```
+
+| Parameter            | Type       | SIGHUP reload | Default value         | Description                                                                                                              |
+|----------------------|------------|---------------|-----------------------|--------------------------------------------------------------------------------------------------------------------------|
+| `namespace_header`   | `string`   | yes           | `X-Frostfs-Namespace` | Header to determine zone to resolve bucket name.                                                                         |
+| `default_namespaces` | `[]string` | yes           | ["","root"]           | Namespaces that should be handled as default.                                                                            |

downloader/download.go

@@ -1,498 +0,0 @@
-package downloader
-
-import (
-	"archive/zip"
-	"bufio"
-	"bytes"
-	"context"
-	"errors"
-	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"path"
-	"strconv"
-	"strings"
-	"time"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
-	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
-	"github.com/valyala/fasthttp"
-	"go.uber.org/atomic"
-	"go.uber.org/zap"
-)
-
-type request struct {
-	*fasthttp.RequestCtx
-	appCtx context.Context
-	log    *zap.Logger
-}
-
-func isValidToken(s string) bool {
-	for _, c := range s {
-		if c <= ' ' || c > 127 {
-			return false
-		}
-		if strings.ContainsRune("()<>@,;:\\\"/[]?={}", c) {
-			return false
-		}
-	}
-	return true
-}
-
-func isValidValue(s string) bool {
-	for _, c := range s {
-		// HTTP specification allows for more technically, but we don't want to escape things.
-		if c < ' ' || c > 127 || c == '"' {
-			return false
-		}
-	}
-	return true
-}
-
-type readCloser struct {
-	io.Reader
-	io.Closer
-}
-
-// initializes io.Reader with the limited size and detects Content-Type from it.
-// Returns r's error directly. Also returns the processed data.
-func readContentType(maxSize uint64, rInit func(uint64) (io.Reader, error)) (string, []byte, error) {
-	if maxSize > sizeToDetectType {
-		maxSize = sizeToDetectType
-	}
-
-	buf := make([]byte, maxSize) // maybe sync-pool the slice?
-
-	r, err := rInit(maxSize)
-	if err != nil {
-		return "", nil, err
-	}
-
-	n, err := r.Read(buf)
-	if err != nil && err != io.EOF {
-		return "", nil, err
-	}
-
-	buf = buf[:n]
-
-	return http.DetectContentType(buf), buf, err // to not lose io.EOF
-}
-
-func (r request) receiveFile(clnt *pool.Pool, objectAddress oid.Address) {
-	var (
-		err      error
-		dis      = "inline"
-		start    = time.Now()
-		filename string
-	)
-	if err = tokens.StoreBearerToken(r.RequestCtx); err != nil {
-		r.log.Error("could not fetch and store bearer token", zap.Error(err))
-		response.Error(r.RequestCtx, "could not fetch and store bearer token: "+err.Error(), fasthttp.StatusBadRequest)
-		return
-	}
-
-	var prm pool.PrmObjectGet
-	prm.SetAddress(objectAddress)
-	if btoken := bearerToken(r.RequestCtx); btoken != nil {
-		prm.UseBearer(*btoken)
-	}
-
-	rObj, err := clnt.GetObject(r.appCtx, prm)
-	if err != nil {
-		r.handleFrostFSErr(err, start)
-		return
-	}
-
-	// we can't close reader in this function, so how to do it?
-
-	if r.Request.URI().QueryArgs().GetBool("download") {
-		dis = "attachment"
-	}
-
-	payloadSize := rObj.Header.PayloadSize()
-
-	r.Response.Header.Set(fasthttp.HeaderContentLength, strconv.FormatUint(payloadSize, 10))
-	var contentType string
-	for _, attr := range rObj.Header.Attributes() {
-		key := attr.Key()
-		val := attr.Value()
-		if !isValidToken(key) || !isValidValue(val) {
-			continue
-		}
-
-		key = utils.BackwardTransformIfSystem(key)
-
-		r.Response.Header.Set(utils.UserAttributeHeaderPrefix+key, val)
-		switch key {
-		case object.AttributeFileName:
-			filename = val
-		case object.AttributeTimestamp:
-			value, err := strconv.ParseInt(val, 10, 64)
-			if err != nil {
-				r.log.Info("couldn't parse creation date",
-					zap.String("key", key),
-					zap.String("val", val),
-					zap.Error(err))
-				continue
-			}
-			r.Response.Header.Set(fasthttp.HeaderLastModified,
-				time.Unix(value, 0).UTC().Format(http.TimeFormat))
-		case object.AttributeContentType:
-			contentType = val
-		}
-	}
-
-	idsToResponse(&r.Response, &rObj.Header)
-
-	if len(contentType) == 0 {
-		// determine the Content-Type from the payload head
-		var payloadHead []byte
-
-		contentType, payloadHead, err = readContentType(payloadSize, func(uint64) (io.Reader, error) {
-			return rObj.Payload, nil
-		})
-		if err != nil && err != io.EOF {
-			r.log.Error("could not detect Content-Type from payload", zap.Error(err))
-			response.Error(r.RequestCtx, "could not detect Content-Type from payload: "+err.Error(), fasthttp.StatusBadRequest)
-			return
-		}
-
-		// reset payload reader since a part of the data has been read
-		var headReader io.Reader = bytes.NewReader(payloadHead)
-
-		if err != io.EOF { // otherwise, we've already read full payload
-			headReader = io.MultiReader(headReader, rObj.Payload)
-		}
-
-		// note: we could do with io.Reader, but SetBodyStream below closes body stream
-		// if it implements io.Closer and that's useful for us.
-		rObj.Payload = readCloser{headReader, rObj.Payload}
-	}
-	r.SetContentType(contentType)
-
-	r.Response.Header.Set(fasthttp.HeaderContentDisposition, dis+"; filename="+path.Base(filename))
-
-	r.Response.SetBodyStream(rObj.Payload, int(payloadSize))
-}
-
-func bearerToken(ctx context.Context) *bearer.Token {
-	if tkn, err := tokens.LoadBearerToken(ctx); err == nil {
-		return tkn
-	}
-	return nil
-}
-
-func (r *request) handleFrostFSErr(err error, start time.Time) {
-	logFields := []zap.Field{
-		zap.Stringer("elapsed", time.Since(start)),
-		zap.Error(err),
-	}
-	statusCode, msg, additionalFields := response.FormErrorResponse("could not receive object", err)
-	logFields = append(logFields, additionalFields...)
-
-	r.log.Error("could not receive object", logFields...)
-	response.Error(r.RequestCtx, msg, statusCode)
-}
-
-// Downloader is a download request handler.
-type Downloader struct {
-	appCtx            context.Context
-	log               *zap.Logger
-	pool              *pool.Pool
-	containerResolver *resolver.ContainerResolver
-	settings          *Settings
-}
-
-// Settings stores reloading parameters, so it has to provide atomic getters and setters.
-type Settings struct {
-	zipCompression atomic.Bool
-}
-
-func (s *Settings) ZipCompression() bool {
-	return s.zipCompression.Load()
-}
-
-func (s *Settings) SetZipCompression(val bool) {
-	s.zipCompression.Store(val)
-}
-
-// New creates an instance of Downloader using specified options.
-func New(ctx context.Context, params *utils.AppParams, settings *Settings) *Downloader {
-	return &Downloader{
-		appCtx:            ctx,
-		log:               params.Logger,
-		pool:              params.Pool,
-		settings:          settings,
-		containerResolver: params.Resolver,
-	}
-}
-
-func (d *Downloader) newRequest(ctx *fasthttp.RequestCtx, log *zap.Logger) *request {
-	return &request{
-		RequestCtx: ctx,
-		appCtx:     d.appCtx,
-		log:        log,
-	}
-}
-
-// DownloadByAddress handles download requests using simple cid/oid format.
-func (d *Downloader) DownloadByAddress(c *fasthttp.RequestCtx) {
-	d.byAddress(c, request.receiveFile)
-}
-
-// byAddress is a wrapper for function (e.g. request.headObject, request.receiveFile) that
-// prepares request and object address to it.
-func (d *Downloader) byAddress(c *fasthttp.RequestCtx, f func(request, *pool.Pool, oid.Address)) {
-	var (
-		idCnr, _ = c.UserValue("cid").(string)
-		idObj, _ = c.UserValue("oid").(string)
-		log      = d.log.With(zap.String("cid", idCnr), zap.String("oid", idObj))
-	)
-
-	cnrID, err := utils.GetContainerID(d.appCtx, idCnr, d.containerResolver)
-	if err != nil {
-		log.Error("wrong container id", zap.Error(err))
-		response.Error(c, "wrong container id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	objID := new(oid.ID)
-	if err = objID.DecodeString(idObj); err != nil {
-		log.Error("wrong object id", zap.Error(err))
-		response.Error(c, "wrong object id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	var addr oid.Address
-	addr.SetContainer(*cnrID)
-	addr.SetObject(*objID)
-
-	f(*d.newRequest(c, log), d.pool, addr)
-}
-
-// DownloadByAttribute handles attribute-based download requests.
-func (d *Downloader) DownloadByAttribute(c *fasthttp.RequestCtx) {
-	d.byAttribute(c, request.receiveFile)
-}
-
-// byAttribute is a wrapper similar to byAddress.
-func (d *Downloader) byAttribute(c *fasthttp.RequestCtx, f func(request, *pool.Pool, oid.Address)) {
-	var (
-		scid, _ = c.UserValue("cid").(string)
-		key, _  = url.QueryUnescape(c.UserValue("attr_key").(string))
-		val, _  = url.QueryUnescape(c.UserValue("attr_val").(string))
-		log     = d.log.With(zap.String("cid", scid), zap.String("attr_key", key), zap.String("attr_val", val))
-	)
-
-	containerID, err := utils.GetContainerID(d.appCtx, scid, d.containerResolver)
-	if err != nil {
-		log.Error("wrong container id", zap.Error(err))
-		response.Error(c, "wrong container id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	res, err := d.search(c, containerID, key, val, object.MatchStringEqual)
-	if err != nil {
-		log.Error("could not search for objects", zap.Error(err))
-		response.Error(c, "could not search for objects: "+err.Error(), fasthttp.StatusBadRequest)
-		return
-	}
-
-	defer res.Close()
-
-	buf := make([]oid.ID, 1)
-
-	n, err := res.Read(buf)
-	if n == 0 {
-		if errors.Is(err, io.EOF) {
-			log.Error("object not found", zap.Error(err))
-			response.Error(c, "object not found", fasthttp.StatusNotFound)
-			return
-		}
-
-		log.Error("read object list failed", zap.Error(err))
-		response.Error(c, "read object list failed: "+err.Error(), fasthttp.StatusBadRequest)
-		return
-	}
-
-	var addrObj oid.Address
-	addrObj.SetContainer(*containerID)
-	addrObj.SetObject(buf[0])
-
-	f(*d.newRequest(c, log), d.pool, addrObj)
-}
-
-func (d *Downloader) search(c *fasthttp.RequestCtx, cid *cid.ID, key, val string, op object.SearchMatchType) (pool.ResObjectSearch, error) {
-	filters := object.NewSearchFilters()
-	filters.AddRootFilter()
-	filters.AddFilter(key, val, op)
-
-	var prm pool.PrmObjectSearch
-	prm.SetContainerID(*cid)
-	prm.SetFilters(filters)
-	if btoken := bearerToken(c); btoken != nil {
-		prm.UseBearer(*btoken)
-	}
-
-	return d.pool.SearchObjects(d.appCtx, prm)
-}
-
-func (d *Downloader) getContainer(cnrID cid.ID) (container.Container, error) {
-	var prm pool.PrmContainerGet
-	prm.SetContainerID(cnrID)
-
-	return d.pool.GetContainer(d.appCtx, prm)
-}
-
-func (d *Downloader) addObjectToZip(zw *zip.Writer, obj *object.Object) (io.Writer, error) {
-	method := zip.Store
-	if d.settings.ZipCompression() {
-		method = zip.Deflate
-	}
-
-	filePath := getZipFilePath(obj)
-	if len(filePath) == 0 || filePath[len(filePath)-1] == '/' {
-		return nil, fmt.Errorf("invalid filepath '%s'", filePath)
-	}
-
-	return zw.CreateHeader(&zip.FileHeader{
-		Name:     filePath,
-		Method:   method,
-		Modified: time.Now(),
-	})
-}
-
-// DownloadZipped handles zip by prefix requests.
-func (d *Downloader) DownloadZipped(c *fasthttp.RequestCtx) {
-	scid, _ := c.UserValue("cid").(string)
-	prefix, _ := url.QueryUnescape(c.UserValue("prefix").(string))
-	log := d.log.With(zap.String("cid", scid), zap.String("prefix", prefix))
-
-	containerID, err := utils.GetContainerID(d.appCtx, scid, d.containerResolver)
-	if err != nil {
-		log.Error("wrong container id", zap.Error(err))
-		response.Error(c, "wrong container id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	if err = tokens.StoreBearerToken(c); err != nil {
-		log.Error("could not fetch and store bearer token", zap.Error(err))
-		response.Error(c, "could not fetch and store bearer token: "+err.Error(), fasthttp.StatusBadRequest)
-		return
-	}
-
-	// check if container exists here to be able to return 404 error,
-	// otherwise we get this error only in object iteration step
-	// and client get 200 OK.
-	if _, err = d.getContainer(*containerID); err != nil {
-		log.Error("could not check container existence", zap.Error(err))
-		if client.IsErrContainerNotFound(err) {
-			response.Error(c, "Not Found", fasthttp.StatusNotFound)
-			return
-		}
-		response.Error(c, "could not check container existence: "+err.Error(), fasthttp.StatusBadRequest)
-		return
-	}
-
-	resSearch, err := d.search(c, containerID, object.AttributeFilePath, prefix, object.MatchCommonPrefix)
-	if err != nil {
-		log.Error("could not search for objects", zap.Error(err))
-		response.Error(c, "could not search for objects: "+err.Error(), fasthttp.StatusBadRequest)
-		return
-	}
-
-	c.Response.Header.Set(fasthttp.HeaderContentType, "application/zip")
-	c.Response.Header.Set(fasthttp.HeaderContentDisposition, "attachment; filename=\"archive.zip\"")
-	c.Response.SetStatusCode(http.StatusOK)
-
-	c.SetBodyStreamWriter(func(w *bufio.Writer) {
-		defer resSearch.Close()
-
-		zipWriter := zip.NewWriter(w)
-
-		var bufZip []byte
-		var addr oid.Address
-
-		empty := true
-		called := false
-		btoken := bearerToken(c)
-		addr.SetContainer(*containerID)
-
-		errIter := resSearch.Iterate(func(id oid.ID) bool {
-			called = true
-
-			if empty {
-				bufZip = make([]byte, 3<<20) // the same as for upload
-			}
-			empty = false
-
-			addr.SetObject(id)
-			if err = d.zipObject(zipWriter, addr, btoken, bufZip); err != nil {
-				log.Error("failed to add object to archive", zap.String("oid", id.EncodeToString()), zap.Error(err))
-			}
-
-			return false
-		})
-		if errIter != nil {
-			log.Error("iterating over selected objects failed", zap.Error(errIter))
-		} else if !called {
-			log.Error("objects not found")
-		}
-
-		if err = zipWriter.Close(); err != nil {
-			log.Error("close zip writer", zap.Error(err))
-		}
-	})
-}
-
-func (d *Downloader) zipObject(zipWriter *zip.Writer, addr oid.Address, btoken *bearer.Token, bufZip []byte) error {
-	var prm pool.PrmObjectGet
-	prm.SetAddress(addr)
-	if btoken != nil {
-		prm.UseBearer(*btoken)
-	}
-
-	resGet, err := d.pool.GetObject(d.appCtx, prm)
-	if err != nil {
-		return fmt.Errorf("get FrostFS object: %v", err)
-	}
-
-	objWriter, err := d.addObjectToZip(zipWriter, &resGet.Header)
-	if err != nil {
-		return fmt.Errorf("zip create header: %v", err)
-	}
-
-	if _, err = io.CopyBuffer(objWriter, resGet.Payload, bufZip); err != nil {
-		return fmt.Errorf("copy object payload to zip file: %v", err)
-	}
-
-	if err = resGet.Payload.Close(); err != nil {
-		return fmt.Errorf("object body close error: %w", err)
-	}
-
-	if err = zipWriter.Flush(); err != nil {
-		return fmt.Errorf("flush zip writer: %v", err)
-	}
-
-	return nil
-}
-
-func getZipFilePath(obj *object.Object) string {
-	for _, attr := range obj.Attributes() {
-		if attr.Key() == object.AttributeFilePath {
-			return attr.Value()
-		}
-	}
-
-	return ""
-}

go.mod

@@ -1,61 +1,70 @@
 module git.frostfs.info/TrueCloudLab/frostfs-http-gw
 
-go 1.18
+go 1.20
 
 require (
-	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230602142024-4cb0068ddef0
-	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230329125804-552219b8e130
+	git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20231121085847-241a9f1ad0a4
+	git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20230531082742-c97d21411eb6
+	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20231107114540-ab75edd70939
+	git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02
+	github.com/bluele/gcache v0.0.2
 	github.com/fasthttp/router v1.4.1
-	github.com/nspcc-dev/neo-go v0.101.0
-	github.com/prometheus/client_golang v1.13.0
+	github.com/nspcc-dev/neo-go v0.101.2-0.20230601131642-a0117042e8fc
+	github.com/prometheus/client_golang v1.15.1
+	github.com/prometheus/client_model v0.3.0
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.15.0
-	github.com/stretchr/testify v1.8.2
+	github.com/ssgreg/journald v1.0.0
+	github.com/stretchr/testify v1.8.3
 	github.com/testcontainers/testcontainers-go v0.13.0
 	github.com/valyala/fasthttp v1.34.0
-	go.uber.org/atomic v1.10.0
+	go.opentelemetry.io/otel v1.16.0
+	go.opentelemetry.io/otel/trace v1.16.0
 	go.uber.org/zap v1.24.0
+	golang.org/x/exp v0.0.0-20230515195305-f3d0a9c9a5cc
+	golang.org/x/net v0.10.0
+	google.golang.org/grpc v1.55.0
 )
 
 require (
 	git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb // indirect
 	git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 // indirect
-	git.frostfs.info/TrueCloudLab/hrw v1.2.0 // indirect
+	git.frostfs.info/TrueCloudLab/hrw v1.2.1 // indirect
 	git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0 // indirect
 	git.frostfs.info/TrueCloudLab/tzhash v1.8.0 // indirect
 	github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 // indirect
 	github.com/Microsoft/go-winio v0.5.2 // indirect
 	github.com/Microsoft/hcsshim v0.9.2 // indirect
 	github.com/andybalholm/brotli v1.0.4 // indirect
-	github.com/antlr/antlr4/runtime/Go/antlr/v4 v4.0.0-20221202181307-76fa05c21b12 // indirect
+	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cenkalti/backoff/v4 v4.2.0 // indirect
+	github.com/cenkalti/backoff/v4 v4.2.1 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/containerd/cgroups v1.0.3 // indirect
 	github.com/containerd/containerd v1.6.2 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.2.0 // indirect
 	github.com/docker/distribution v2.8.1+incompatible // indirect
 	github.com/docker/docker v20.10.14+incompatible // indirect
 	github.com/docker/go-connections v0.4.0 // indirect
 	github.com/docker/go-units v0.4.0 // indirect
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
-	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-logr/logr v1.2.4 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/gorilla/mux v1.8.0 // indirect
-	github.com/gorilla/websocket v1.4.2 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.7.0 // indirect
+	github.com/gorilla/websocket v1.5.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.15.2 // indirect
 	github.com/hashicorp/golang-lru v0.6.0 // indirect
-	github.com/hashicorp/golang-lru/v2 v2.0.1 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.2 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/klauspost/compress v1.15.0 // indirect
+	github.com/klauspost/compress v1.16.4 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/moby/sys/mount v0.3.2 // indirect
 	github.com/moby/sys/mountinfo v0.6.1 // indirect
@@ -63,7 +72,7 @@ require (
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/mr-tron/base58 v1.2.0 // indirect
 	github.com/nspcc-dev/go-ordered-json v0.0.0-20220111165707-25110be27d22 // indirect
-	github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20221202075445-cb5c18dc73eb // indirect
+	github.com/nspcc-dev/neo-go/pkg/interop v0.0.0-20230615193820-9185820289ce // indirect
 	github.com/nspcc-dev/rfc6979 v0.2.0 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opencontainers/image-spec v1.0.2 // indirect
@@ -71,41 +80,37 @@ require (
 	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/prometheus/common v0.42.0 // indirect
+	github.com/prometheus/procfs v0.9.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/savsgio/gotils v0.0.0-20210617111740-97865ed5a873 // indirect
 	github.com/sirupsen/logrus v1.8.1 // indirect
-	github.com/spaolacci/murmur3 v1.1.0 // indirect
 	github.com/spf13/afero v1.9.3 // indirect
 	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/subosito/gotenv v1.4.2 // indirect
 	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7 // indirect
+	github.com/twmb/murmur3 v1.1.8 // indirect
 	github.com/urfave/cli v1.22.5 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	go.opencensus.io v0.24.0 // indirect
-	go.opentelemetry.io/otel v1.14.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.14.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.14.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.14.0 // indirect
-	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.14.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.14.0 // indirect
-	go.opentelemetry.io/otel/trace v1.14.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.16.0 // indirect
+	go.opentelemetry.io/otel/metric v1.16.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.16.0 // indirect
 	go.opentelemetry.io/proto/otlp v0.19.0 // indirect
-	go.uber.org/multierr v1.9.0 // indirect
-	golang.org/x/crypto v0.4.0 // indirect
-	golang.org/x/exp v0.0.0-20221227203929-1b447090c38c // indirect
-	golang.org/x/net v0.7.0 // indirect
-	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
-	golang.org/x/term v0.5.0 // indirect
-	golang.org/x/text v0.7.0 // indirect
-	google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect
-	google.golang.org/grpc v1.53.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
-	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	go.uber.org/atomic v1.10.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/crypto v0.9.0 // indirect
+	golang.org/x/sync v0.2.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/term v0.8.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -37,20 +37,24 @@ cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RX
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230602142024-4cb0068ddef0 h1:2rgsz9KdOf2obbL/FRCZNUZja83kQZxPuF8IKBDl/bY=
-git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.15.1-0.20230602142024-4cb0068ddef0/go.mod h1:sPyITTmQT662ZI38ud2aoE1SUCAr1mO5xV8P4nzLkKI=
+git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20231121085847-241a9f1ad0a4 h1:wjLfZ3WCt7qNGsQv+Jl0TXnmtg0uVk/jToKPFTBc/jo=
+git.frostfs.info/TrueCloudLab/frostfs-api-go/v2 v2.16.1-0.20231121085847-241a9f1ad0a4/go.mod h1:uY0AYmCznjZdghDnAk7THFIe1Vlg531IxUcus7ZfUJI=
 git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb h1:S/TrbOOu9qEXZRZ9/Ddw7crnxbBUQLo68PSzQWYrc9M=
 git.frostfs.info/TrueCloudLab/frostfs-contract v0.0.0-20230307110621-19a8ef2d02fb/go.mod h1:nkR5gaGeez3Zv2SE7aceP0YwxG2FzIB5cGKpQO2vV2o=
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 h1:FxqFDhQYYgpe41qsIHVOcdzSVCB8JNSfPG7Uk4r2oSk=
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0/go.mod h1:RUIKZATQLJ+TaYQa60X2fTDwfuhMfm8Ar60bQ5fr+vU=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230329125804-552219b8e130 h1:V+3dGwEXwEvvSvseMKn8S6ZEMNhxBBYrcyx+F7VaptM=
-git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20230329125804-552219b8e130/go.mod h1:23fUGlEv/ImaOi3vck6vZj0v0b4hteOhLLPnVWHSQeA=
-git.frostfs.info/TrueCloudLab/hrw v1.2.0 h1:KvAES7xIqmQBGd2q8KanNosD9+4BhU/zqD5Kt5KSflk=
-git.frostfs.info/TrueCloudLab/hrw v1.2.0/go.mod h1:mq2sbvYfO+BB6iFZwYBkgC0yc6mJNx+qZi4jW918m+Y=
+git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20230531082742-c97d21411eb6 h1:aGQ6QaAnTerQ5Dq5b2/f9DUQtSqPkZZ/bkMx/HKuLCo=
+git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20230531082742-c97d21411eb6/go.mod h1:W8Nn08/l6aQ7UlIbpF7FsQou7TVpcRD1ZT1KG4TrFhE=
+git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20231107114540-ab75edd70939 h1:jZEepi9yWmqrWgLRQcHQu4YPJaudmd7d2AEhpmM3m4U=
+git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20231107114540-ab75edd70939/go.mod h1:t1akKcUH7iBrFHX8rSXScYMP17k2kYQXMbZooiL5Juw=
+git.frostfs.info/TrueCloudLab/hrw v1.2.1 h1:ccBRK21rFvY5R1WotI6LNoPlizk7qSvdfD8lNIRudVc=
+git.frostfs.info/TrueCloudLab/hrw v1.2.1/go.mod h1:C1Ygde2n843yTZEQ0FP69jYiuaYV0kriLvP4zm8JuvM=
 git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0 h1:M2KR3iBj7WpY3hP10IevfIB9MURr4O9mwVfJ+SjT3HA=
 git.frostfs.info/TrueCloudLab/rfc6979 v0.4.0/go.mod h1:okpbKfVYf/BpejtfFTfhZqFP+sZ8rsHrP8Rr/jYPNRc=
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0 h1:UFMnUIk0Zh17m8rjGHJMqku2hCgaXDqjqZzS4gsb4UA=
 git.frostfs.info/TrueCloudLab/tzhash v1.8.0/go.mod h1:dhY+oy274hV8wGvGL4MwwMpdL3GYvaX1a8GQZQHvlF8=
+git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02 h1:HeY8n27VyPRQe49l/fzyVMkWEB2fsLJYKp64pwA7tz4=
+git.frostfs.info/TrueCloudLab/zapjournald v0.0.0-20240124114243-cb2e66427d02/go.mod h1:rQFJJdEOV7KbbMtQYR2lNfiZk+ONRDJSbMCTWxKt8Fw=
 github.com/Azure/azure-sdk-for-go v16.2.1+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
 github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
@@ -119,8 +123,8 @@ github.com/andybalholm/brotli v1.0.4 h1:V7DdXeJtZscaqfNuAdSRuRFzuiKlHSC/Zh3zl9qY
 github.com/andybalholm/brotli v1.0.4/go.mod h1:fO7iG3H7G2nSZ7m0zPUDn85XEX2GTukHGRSepvi9Eig=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/antlr/antlr4/runtime/Go/antlr v0.0.0-20210521073959-f0d4d129b7f1/go.mod h1:F7bn7fEU90QkQ3tnmaTx3LTKLEDqnwWODIYppRQ5hnY=
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@@ -136,6 +140,8 @@ github.com/bitly/go-simplejson v0.5.0/go.mod h1:cXHtHw4XUPsvGaxgjIAn8PhEWG9NfngE
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@@ -156,8 +162,8 @@ github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b/go.mod h1:obH5gd0Bsq
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@@ -312,9 +318,8 @@ github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2
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-github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
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@@ -368,7 +373,7 @@ github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:r
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@@ -392,8 +397,8 @@ github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KE
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@@ -430,8 +435,8 @@ github.com/gogo/protobuf v1.3.1/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXP
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@@ -463,8 +468,9 @@ github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QD
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@@ -523,8 +529,9 @@ github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
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@@ -532,8 +539,9 @@ github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgf
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@@ -543,8 +551,8 @@ github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ
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@@ -586,8 +594,9 @@ github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6
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@@ -596,8 +605,8 @@ github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFB
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@@ -626,8 +635,9 @@ github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzp
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@@ -681,11 +691,11 @@ github.com/nspcc-dev/hrw v1.0.9/go.mod h1:l/W2vx83vMQo6aStyx2AuZrJ+07lGv2JQGlVkP
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@@ -775,14 +785,16 @@ github.com/prometheus/client_golang v1.2.1/go.mod h1:XMU6Z2MjaRKVu/dC1qupJI9SiNk
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@@ -792,8 +804,9 @@ github.com/prometheus/common v0.7.0/go.mod h1:DjGbpBbp5NYNiECxcL/VnbXCCaQpKd3tt2
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@@ -806,14 +819,15 @@ github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4O
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@@ -838,7 +852,6 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1
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@@ -862,6 +875,8 @@ github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An
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@@ -879,8 +894,8 @@ github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
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@@ -896,6 +911,8 @@ github.com/testcontainers/testcontainers-go v0.13.0/go.mod h1:z1abufU633Eb/FmSBT
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@@ -950,20 +967,22 @@ go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
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-go.opentelemetry.io/otel v1.14.0 h1:/79Huy8wbf5DnIPhemGB+zEPVwnN6fuQybr/SRXa6hM=
-go.opentelemetry.io/otel v1.14.0/go.mod h1:o4buv+dJzx8rohcUeRmWUZhqupFvzWis188WlggnNeU=
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+go.opentelemetry.io/otel/metric v1.16.0/go.mod h1:QE47cpOmkwipPiefDwo2wDzwJrlfxxNYodqc4xnGCo4=
+go.opentelemetry.io/otel/sdk v1.16.0 h1:Z1Ok1YsijYL0CSJpHt4cS3wDDh7p572grzNrBMiMWgE=
+go.opentelemetry.io/otel/sdk v1.16.0/go.mod h1:tMsIuKXuuIWPBAOrH+eHtvhTL+SntFtXF9QD68aP6p4=
+go.opentelemetry.io/otel/trace v1.16.0 h1:8JRpaObFoW0pxuVPapkgH8UhHQj+bJW8jJsCZEu5MQs=
+go.opentelemetry.io/otel/trace v1.16.0/go.mod h1:Yt9vYq1SdNz3xdjZZK7wcXv1qv2pwLkqr2QVwea0ef0=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 go.opentelemetry.io/proto/otlp v0.19.0 h1:IVN6GR+mhC4s5yfcTbmzHYODqvWAp3ZedA2SJPI1Nnw=
 go.opentelemetry.io/proto/otlp v0.19.0/go.mod h1:H7XAot3MsfNsj7EXtrA2q5xSNQ10UqI405h3+duxN4U=
@@ -978,8 +997,8 @@ go.uber.org/goleak v1.1.12/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ
 go.uber.org/goleak v1.2.1 h1:NBol2c7O1ZokfZ0LEU9K6Whx/KnwvepVetCUhtKja4A=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
-go.uber.org/multierr v1.9.0 h1:7fIwc/ZtS0q++VgcfqFDxSBZVv/Xo49/SYnDFupUwlI=
-go.uber.org/multierr v1.9.0/go.mod h1:X2jQV1h+kxSjClGpnseKVIxpmcjrj7MNnI0bnlfKTVQ=
+go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
+go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 go.uber.org/zap v1.18.1/go.mod h1:xg/QME4nWcxGxrpdeYfq7UvYrLh66cuVKdrbD1XF/NI=
 go.uber.org/zap v1.24.0 h1:FiJd5l1UOLj0wCgbSE0rwwXHzEdAZS6hiiSnxJN/D60=
@@ -1005,8 +1024,8 @@ golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5
 golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20220214200702-86341886e292/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.4.0 h1:UVQgzMY87xqpKNgb+kDsll2Igd33HszWHFLmpaRMq/8=
-golang.org/x/crypto v0.4.0/go.mod h1:3quD/ATkf6oY+rnes5c3ExXTbLc8mueNue5/DoinL80=
+golang.org/x/crypto v0.9.0 h1:LF6fAI+IutBocDJ2OT0Q1g8plpYljMZ4+lty+dsqw3g=
+golang.org/x/crypto v0.9.0/go.mod h1:yrmDGqONDYtNj3tH8X9dzUun2m2lzPa9ngI6/RUPGR0=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -1017,8 +1036,8 @@ golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u0
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
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-golang.org/x/exp v0.0.0-20221227203929-1b447090c38c h1:Govq2W3bnHJimHT2ium65kXcI7ZzTniZHcFATnLJM0Q=
-golang.org/x/exp v0.0.0-20221227203929-1b447090c38c/go.mod h1:CxIveKay+FTh1D0yPZemJVgC/95VzuuOLq5Qi4xnoYc=
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 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
@@ -1099,8 +1118,8 @@ golang.org/x/net v0.0.0-20211108170745-6635138e15ea/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
-golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -1125,8 +1144,8 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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+golang.org/x/sync v0.2.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@@ -1226,13 +1245,13 @@ golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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-golang.org/x/term v0.5.0 h1:n2a8QNdAb0sZNpU9R1ALUXBbY+w51fCQDN+7EdxNBsY=
-golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/term v0.8.0 h1:n5xxQn2i3PC0yLAbjTpNT85q/Kgzcr2gIoX9OrJUols=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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@@ -1242,15 +1261,16 @@ golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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-golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
-golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.9.0 h1:2sjJmO8cDvYveuX97RDLsxlyUxLl+GHoLxBiRdHllBE=
+golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20200416051211-89c76fbcd5d1/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.1.0 h1:xYY+Bajn2a7VBmTM5GikTmnK8ZuX8YgnQCqZpbBNtmA=
+golang.org/x/time v0.3.0 h1:rg5rLMjNzMS1RkNLzCG38eapWhnYLFYXDXj2gOlr8j4=
+golang.org/x/time v0.3.0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180318012157-96caea41033d/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -1390,8 +1410,8 @@ google.golang.org/genproto v0.0.0-20201214200347-8c77b98c765d/go.mod h1:FWY/as6D
 google.golang.org/genproto v0.0.0-20210108203827-ffc7fda8c3d7/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20210226172003-ab064af71705/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
-google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f h1:BWUVssLB0HVOSY78gIdvk1dTVYtT1y8SBWtPYuTJ/6w=
-google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f/go.mod h1:RGgjbofJ8xD9Sq1VVhDM1Vok1vRONV+rg+CjzG4SZKM=
+google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 h1:KpwkzHKEF7B9Zxg18WzOa7djJ+Ha5DzthMyZYQfEn2A=
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 google.golang.org/grpc v0.0.0-20160317175043-d3ddb4469d5a/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
@@ -1417,8 +1437,8 @@ google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAG
 google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/grpc v1.41.0/go.mod h1:U3l9uK9J0sini8mHphKoXyaqDA/8VyGnDee1zzIUK6k=
 google.golang.org/grpc v1.42.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
-google.golang.org/grpc v1.53.0 h1:LAv2ds7cmFV/XTS3XG1NneeENYrXGmorPxsBbptIjNc=
-google.golang.org/grpc v1.53.0/go.mod h1:OnIrk0ipVdj4N5d9IUoFUx72/VlD7+jUsHwZgwSMQpw=
+google.golang.org/grpc v1.55.0 h1:3Oj82/tFSCeUrRTg/5E/7d/W5A1tj6Ky1ABAuZuv5ag=
+google.golang.org/grpc v1.55.0/go.mod h1:iYEXKGkEBhg1PjZQvoYEVPTDkHo1/bjTnfwTeGONTY8=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -1432,8 +1452,9 @@ google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlba
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
 google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
+google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/abiosoft/ishell.v2 v2.0.0/go.mod h1:sFp+cGtH6o4s1FtpVPTMcHq2yue+c4DGOVohJCPUzwY=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
@@ -1443,7 +1464,6 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=

internal/api/layer/tree_service.go

@@ -0,0 +1,22 @@
+package layer
+
+import (
+	"context"
+	"errors"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/api"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+)
+
+// TreeService provide interface to interact with tree service using s3 data models.
+type TreeService interface {
+	GetLatestVersion(ctx context.Context, cnrID *cid.ID, objectName string) (*api.NodeVersion, error)
+}
+
+var (
+	// ErrNodeNotFound is returned from Tree service in case of not found error.
+	ErrNodeNotFound = errors.New("not found")
+
+	// ErrNodeAccessDenied is returned from Tree service in case of access denied error.
+	ErrNodeAccessDenied = errors.New("access denied")
+)

internal/api/tree.go

@@ -0,0 +1,17 @@
+package api
+
+import (
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+)
+
+// NodeVersion represent node from tree service.
+type NodeVersion struct {
+	BaseNodeVersion
+	DeleteMarker bool
+}
+
+// BaseNodeVersion is minimal node info from tree service.
+// Basically used for "system" object.
+type BaseNodeVersion struct {
+	OID oid.ID
+}

internal/cache/buckets.go

@@ -0,0 +1,72 @@
+package cache
+
+import (
+	"fmt"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"github.com/bluele/gcache"
+	"go.uber.org/zap"
+)
+
+// BucketCache contains cache with objects and the lifetime of cache entries.
+type BucketCache struct {
+	cache  gcache.Cache
+	logger *zap.Logger
+}
+
+// Config stores expiration params for cache.
+type Config struct {
+	Size     int
+	Lifetime time.Duration
+	Logger   *zap.Logger
+}
+
+const (
+	// DefaultBucketCacheSize is a default maximum number of entries in cache.
+	DefaultBucketCacheSize = 1e3
+	// DefaultBucketCacheLifetime is a default lifetime of entries in cache.
+	DefaultBucketCacheLifetime = time.Minute
+)
+
+// DefaultBucketConfig returns new default cache expiration values.
+func DefaultBucketConfig(logger *zap.Logger) *Config {
+	return &Config{
+		Size:     DefaultBucketCacheSize,
+		Lifetime: DefaultBucketCacheLifetime,
+		Logger:   logger,
+	}
+}
+
+// NewBucketCache creates an object of BucketCache.
+func NewBucketCache(config *Config) *BucketCache {
+	gc := gcache.New(config.Size).LRU().Expiration(config.Lifetime).Build()
+	return &BucketCache{cache: gc, logger: config.Logger}
+}
+
+// Get returns a cached object.
+func (o *BucketCache) Get(ns, bktName string) *data.BucketInfo {
+	entry, err := o.cache.Get(formKey(ns, bktName))
+	if err != nil {
+		return nil
+	}
+
+	result, ok := entry.(*data.BucketInfo)
+	if !ok {
+		o.logger.Warn(logs.InvalidCacheEntryType, zap.String("actual", fmt.Sprintf("%T", entry)),
+			zap.String("expected", fmt.Sprintf("%T", result)))
+		return nil
+	}
+
+	return result
+}
+
+// Put puts an object to cache.
+func (o *BucketCache) Put(bkt *data.BucketInfo) error {
+	return o.cache.Set(formKey(bkt.Zone, bkt.Name), bkt)
+}
+
+func formKey(ns, name string) string {
+	return name + "." + ns
+}

internal/data/bucket.go

@@ -0,0 +1,12 @@
+package data
+
+import (
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+)
+
+type BucketInfo struct {
+	Name                    string // container name from system attribute
+	Zone                    string // container zone from system attribute
+	CID                     cid.ID
+	HomomorphicHashDisabled bool
+}

internal/frostfs/services/pool_wrapper.go

@@ -0,0 +1,115 @@
+package services
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
+	treepool "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree"
+	grpcService "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool/tree/service"
+)
+
+type GetNodeByPathResponseInfoWrapper struct {
+	response *grpcService.GetNodeByPathResponse_Info
+}
+
+func (n GetNodeByPathResponseInfoWrapper) GetNodeID() uint64 {
+	return n.response.GetNodeId()
+}
+
+func (n GetNodeByPathResponseInfoWrapper) GetParentID() uint64 {
+	return n.response.GetParentId()
+}
+
+func (n GetNodeByPathResponseInfoWrapper) GetTimestamp() uint64 {
+	return n.response.GetTimestamp()
+}
+
+func (n GetNodeByPathResponseInfoWrapper) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.response.Meta))
+	for i, value := range n.response.Meta {
+		res[i] = value
+	}
+	return res
+}
+
+type GetSubTreeResponseBodyWrapper struct {
+	response *grpcService.GetSubTreeResponse_Body
+}
+
+func (n GetSubTreeResponseBodyWrapper) GetNodeID() uint64 {
+	return n.response.GetNodeId()
+}
+
+func (n GetSubTreeResponseBodyWrapper) GetParentID() uint64 {
+	return n.response.GetParentId()
+}
+
+func (n GetSubTreeResponseBodyWrapper) GetTimestamp() uint64 {
+	return n.response.GetTimestamp()
+}
+
+func (n GetSubTreeResponseBodyWrapper) GetMeta() []tree.Meta {
+	res := make([]tree.Meta, len(n.response.Meta))
+	for i, value := range n.response.Meta {
+		res[i] = value
+	}
+	return res
+}
+
+type PoolWrapper struct {
+	p *treepool.Pool
+}
+
+func NewPoolWrapper(p *treepool.Pool) *PoolWrapper {
+	return &PoolWrapper{p: p}
+}
+
+func (w *PoolWrapper) GetNodes(ctx context.Context, prm *tree.GetNodesParams) ([]tree.NodeResponse, error) {
+	poolPrm := treepool.GetNodesParams{
+		CID:           prm.CnrID,
+		TreeID:        prm.TreeID,
+		Path:          prm.Path,
+		Meta:          prm.Meta,
+		PathAttribute: tree.FileNameKey,
+		LatestOnly:    prm.LatestOnly,
+		AllAttrs:      prm.AllAttrs,
+		BearerToken:   getBearer(ctx),
+	}
+
+	nodes, err := w.p.GetNodes(ctx, poolPrm)
+	if err != nil {
+		return nil, handleError(err)
+	}
+
+	res := make([]tree.NodeResponse, len(nodes))
+	for i, info := range nodes {
+		res[i] = GetNodeByPathResponseInfoWrapper{info}
+	}
+
+	return res, nil
+}
+
+func getBearer(ctx context.Context) []byte {
+	token, err := tokens.LoadBearerToken(ctx)
+	if err != nil {
+		return nil
+	}
+	return token.Marshal()
+}
+
+func handleError(err error) error {
+	if err == nil {
+		return nil
+	}
+	if errors.Is(err, treepool.ErrNodeNotFound) {
+		return fmt.Errorf("%w: %s", tree.ErrNodeNotFound, err.Error())
+	}
+	if errors.Is(err, treepool.ErrNodeAccessDenied) {
+		return fmt.Errorf("%w: %s", tree.ErrNodeAccessDenied, err.Error())
+	}
+
+	return err
+}

internal/handler/download.go

@@ -0,0 +1,195 @@
+package handler
+
+import (
+	"archive/zip"
+	"bufio"
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	"github.com/valyala/fasthttp"
+	"go.uber.org/zap"
+)
+
+// DownloadByAddressOrBucketName handles download requests using simple cid/oid or bucketname/key format.
+func (h *Handler) DownloadByAddressOrBucketName(c *fasthttp.RequestCtx) {
+	test, _ := c.UserValue("oid").(string)
+	var id oid.ID
+	err := id.DecodeString(test)
+	if err != nil {
+		h.byObjectName(c, h.receiveFile)
+	} else {
+		h.byAddress(c, h.receiveFile)
+	}
+}
+
+func (h *Handler) newRequest(ctx *fasthttp.RequestCtx, log *zap.Logger) *request {
+	return &request{
+		RequestCtx: ctx,
+		log:        log,
+	}
+}
+
+// DownloadByAttribute handles attribute-based download requests.
+func (h *Handler) DownloadByAttribute(c *fasthttp.RequestCtx) {
+	h.byAttribute(c, h.receiveFile)
+}
+
+func (h *Handler) search(ctx context.Context, cid *cid.ID, key, val string, op object.SearchMatchType) (pool.ResObjectSearch, error) {
+	filters := object.NewSearchFilters()
+	filters.AddRootFilter()
+	filters.AddFilter(key, val, op)
+
+	var prm pool.PrmObjectSearch
+	prm.SetContainerID(*cid)
+	prm.SetFilters(filters)
+	if btoken := bearerToken(ctx); btoken != nil {
+		prm.UseBearer(*btoken)
+	}
+
+	return h.pool.SearchObjects(ctx, prm)
+}
+
+func (h *Handler) addObjectToZip(zw *zip.Writer, obj *object.Object) (io.Writer, error) {
+	method := zip.Store
+	if h.config.ZipCompression() {
+		method = zip.Deflate
+	}
+
+	filePath := getZipFilePath(obj)
+	if len(filePath) == 0 || filePath[len(filePath)-1] == '/' {
+		return nil, fmt.Errorf("invalid filepath '%s'", filePath)
+	}
+
+	return zw.CreateHeader(&zip.FileHeader{
+		Name:     filePath,
+		Method:   method,
+		Modified: time.Now(),
+	})
+}
+
+// DownloadZipped handles zip by prefix requests.
+func (h *Handler) DownloadZipped(c *fasthttp.RequestCtx) {
+	scid, _ := c.UserValue("cid").(string)
+	prefix, _ := c.UserValue("prefix").(string)
+
+	prefix, err := url.QueryUnescape(prefix)
+	if err != nil {
+		h.log.Error(logs.FailedToUnescapeQuery, zap.String("cid", scid), zap.String("prefix", prefix), zap.Uint64("id", c.ID()), zap.Error(err))
+		response.Error(c, "could not unescape prefix: "+err.Error(), fasthttp.StatusBadRequest)
+		return
+	}
+
+	log := h.log.With(zap.String("cid", scid), zap.String("prefix", prefix), zap.Uint64("id", c.ID()))
+
+	ctx := utils.GetContextFromRequest(c)
+
+	bktInfo, err := h.getBucketInfo(ctx, scid, log)
+	if err != nil {
+		logAndSendBucketError(c, log, err)
+		return
+	}
+
+	resSearch, err := h.search(ctx, &bktInfo.CID, object.AttributeFilePath, prefix, object.MatchCommonPrefix)
+	if err != nil {
+		log.Error(logs.CouldNotSearchForObjects, zap.Error(err))
+		response.Error(c, "could not search for objects: "+err.Error(), fasthttp.StatusBadRequest)
+		return
+	}
+
+	c.Response.Header.Set(fasthttp.HeaderContentType, "application/zip")
+	c.Response.Header.Set(fasthttp.HeaderContentDisposition, "attachment; filename=\"archive.zip\"")
+	c.Response.SetStatusCode(http.StatusOK)
+
+	c.SetBodyStreamWriter(func(w *bufio.Writer) {
+		defer resSearch.Close()
+
+		zipWriter := zip.NewWriter(w)
+
+		var bufZip []byte
+		var addr oid.Address
+
+		empty := true
+		called := false
+		btoken := bearerToken(ctx)
+		addr.SetContainer(bktInfo.CID)
+
+		errIter := resSearch.Iterate(func(id oid.ID) bool {
+			called = true
+
+			if empty {
+				bufZip = make([]byte, 3<<20) // the same as for upload
+			}
+			empty = false
+
+			addr.SetObject(id)
+			if err = h.zipObject(ctx, zipWriter, addr, btoken, bufZip); err != nil {
+				log.Error(logs.FailedToAddObjectToArchive, zap.String("oid", id.EncodeToString()), zap.Error(err))
+			}
+
+			return false
+		})
+		if errIter != nil {
+			log.Error(logs.IteratingOverSelectedObjectsFailed, zap.Error(errIter))
+		} else if !called {
+			log.Error(logs.ObjectsNotFound)
+		}
+
+		if err = zipWriter.Close(); err != nil {
+			log.Error(logs.CloseZipWriter, zap.Error(err))
+		}
+	})
+}
+
+func (h *Handler) zipObject(ctx context.Context, zipWriter *zip.Writer, addr oid.Address, btoken *bearer.Token, bufZip []byte) error {
+	var prm pool.PrmObjectGet
+	prm.SetAddress(addr)
+	if btoken != nil {
+		prm.UseBearer(*btoken)
+	}
+
+	resGet, err := h.pool.GetObject(ctx, prm)
+	if err != nil {
+		return fmt.Errorf("get FrostFS object: %v", err)
+	}
+
+	objWriter, err := h.addObjectToZip(zipWriter, &resGet.Header)
+	if err != nil {
+		return fmt.Errorf("zip create header: %v", err)
+	}
+
+	if _, err = io.CopyBuffer(objWriter, resGet.Payload, bufZip); err != nil {
+		return fmt.Errorf("copy object payload to zip file: %v", err)
+	}
+
+	if err = resGet.Payload.Close(); err != nil {
+		return fmt.Errorf("object body close error: %w", err)
+	}
+
+	if err = zipWriter.Flush(); err != nil {
+		return fmt.Errorf("flush zip writer: %v", err)
+	}
+
+	return nil
+}
+
+func getZipFilePath(obj *object.Object) string {
+	for _, attr := range obj.Attributes() {
+		if attr.Key() == object.AttributeFilePath {
+			return attr.Value()
+		}
+	}
+
+	return ""
+}

internal/handler/filter.go

@@ -1,9 +1,10 @@
-package uploader
+package handler
 
 import (
 	"bytes"
 	"fmt"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
@@ -47,7 +48,7 @@ func filterHeaders(l *zap.Logger, header *fasthttp.RequestHeader) (map[string]st
 
 		result[k] = v
 
-		l.Debug("add attribute to result object",
+		l.Debug(logs.AddAttributeToResultObject,
 			zap.String("key", k),
 			zap.String("val", v))
 	})

internal/handler/filter_test.go

@@ -1,6 +1,6 @@
 //go:build !integration
 
-package uploader
+package handler
 
 import (
 	"testing"

internal/handler/handler.go

@@ -0,0 +1,257 @@
+package handler
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"net/url"
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/valyala/fasthttp"
+	"go.uber.org/zap"
+)
+
+type Config interface {
+	DefaultTimestamp() bool
+	ZipCompression() bool
+	ClientCut() bool
+	BufferMaxSizeForPut() uint64
+	NamespaceHeader() string
+}
+
+type Handler struct {
+	log               *zap.Logger
+	pool              *pool.Pool
+	ownerID           *user.ID
+	config            Config
+	containerResolver *resolver.ContainerResolver
+	tree              *tree.Tree
+	cache             *cache.BucketCache
+}
+
+func New(params *utils.AppParams, config Config, tree *tree.Tree) *Handler {
+	return &Handler{
+		log:               params.Logger,
+		pool:              params.Pool,
+		ownerID:           params.Owner,
+		config:            config,
+		containerResolver: params.Resolver,
+		tree:              tree,
+		cache:             params.Cache,
+	}
+}
+
+// byAddress is a wrapper for function (e.g. request.headObject, request.receiveFile) that
+// prepares request and object address to it.
+func (h *Handler) byAddress(c *fasthttp.RequestCtx, f func(context.Context, request, oid.Address)) {
+	var (
+		idCnr, _ = c.UserValue("cid").(string)
+		idObj, _ = c.UserValue("oid").(string)
+		log      = h.log.With(zap.String("cid", idCnr), zap.String("oid", idObj))
+	)
+
+	ctx := utils.GetContextFromRequest(c)
+
+	bktInfo, err := h.getBucketInfo(ctx, idCnr, log)
+	if err != nil {
+		logAndSendBucketError(c, log, err)
+		return
+	}
+
+	objID := new(oid.ID)
+	if err = objID.DecodeString(idObj); err != nil {
+		log.Error(logs.WrongObjectID, zap.Error(err))
+		response.Error(c, "wrong object id", fasthttp.StatusBadRequest)
+		return
+	}
+
+	var addr oid.Address
+	addr.SetContainer(bktInfo.CID)
+	addr.SetObject(*objID)
+
+	f(ctx, *h.newRequest(c, log), addr)
+}
+
+// byObjectName is a wrapper for function (e.g. request.headObject, request.receiveFile) that
+// prepares request and object address to it.
+func (h *Handler) byObjectName(req *fasthttp.RequestCtx, f func(context.Context, request, oid.Address)) {
+	var (
+		bucketname = req.UserValue("cid").(string)
+		key        = req.UserValue("oid").(string)
+		log        = h.log.With(zap.String("bucketname", bucketname), zap.String("key", key))
+	)
+
+	ctx := utils.GetContextFromRequest(req)
+
+	bktInfo, err := h.getBucketInfo(ctx, bucketname, log)
+	if err != nil {
+		logAndSendBucketError(req, log, err)
+		return
+	}
+
+	foundOid, err := h.tree.GetLatestVersion(ctx, &bktInfo.CID, key)
+	if err != nil {
+		if errors.Is(err, tree.ErrNodeAccessDenied) {
+			response.Error(req, "Access Denied", fasthttp.StatusForbidden)
+			return
+		}
+		log.Error(logs.GetLatestObjectVersion, zap.Error(err))
+
+		response.Error(req, "object wasn't found", fasthttp.StatusNotFound)
+		return
+	}
+	if foundOid.DeleteMarker {
+		log.Error(logs.ObjectWasDeleted)
+		response.Error(req, "object deleted", fasthttp.StatusNotFound)
+		return
+	}
+
+	var addr oid.Address
+	addr.SetContainer(bktInfo.CID)
+	addr.SetObject(foundOid.OID)
+
+	f(ctx, *h.newRequest(req, log), addr)
+}
+
+// byAttribute is a wrapper similar to byAddress.
+func (h *Handler) byAttribute(c *fasthttp.RequestCtx, f func(context.Context, request, oid.Address)) {
+	scid, _ := c.UserValue("cid").(string)
+	key, _ := c.UserValue("attr_key").(string)
+	val, _ := c.UserValue("attr_val").(string)
+
+	key, err := url.QueryUnescape(key)
+	if err != nil {
+		h.log.Error(logs.FailedToUnescapeQuery, zap.String("cid", scid), zap.String("attr_key", key), zap.Uint64("id", c.ID()), zap.Error(err))
+		response.Error(c, "could not unescape attr_key: "+err.Error(), fasthttp.StatusBadRequest)
+		return
+	}
+
+	val, err = url.QueryUnescape(val)
+	if err != nil {
+		h.log.Error(logs.FailedToUnescapeQuery, zap.String("cid", scid), zap.String("attr_val", val), zap.Uint64("id", c.ID()), zap.Error(err))
+		response.Error(c, "could not unescape attr_val: "+err.Error(), fasthttp.StatusBadRequest)
+		return
+	}
+
+	log := h.log.With(zap.String("cid", scid), zap.String("attr_key", key), zap.String("attr_val", val))
+
+	ctx := utils.GetContextFromRequest(c)
+
+	bktInfo, err := h.getBucketInfo(ctx, scid, log)
+	if err != nil {
+		logAndSendBucketError(c, log, err)
+		return
+	}
+
+	res, err := h.search(ctx, &bktInfo.CID, key, val, object.MatchStringEqual)
+	if err != nil {
+		log.Error(logs.CouldNotSearchForObjects, zap.Error(err))
+		response.Error(c, "could not search for objects: "+err.Error(), fasthttp.StatusBadRequest)
+		return
+	}
+
+	defer res.Close()
+
+	buf := make([]oid.ID, 1)
+
+	n, err := res.Read(buf)
+	if n == 0 {
+		if errors.Is(err, io.EOF) {
+			log.Error(logs.ObjectNotFound, zap.Error(err))
+			response.Error(c, "object not found", fasthttp.StatusNotFound)
+			return
+		}
+
+		log.Error(logs.ReadObjectListFailed, zap.Error(err))
+		response.Error(c, "read object list failed: "+err.Error(), fasthttp.StatusBadRequest)
+		return
+	}
+
+	var addrObj oid.Address
+	addrObj.SetContainer(bktInfo.CID)
+	addrObj.SetObject(buf[0])
+
+	f(ctx, *h.newRequest(c, log), addrObj)
+}
+
+// resolveContainer decode container id, if it's not a valid container id
+// then trey to resolve name using provided resolver.
+func (h *Handler) resolveContainer(ctx context.Context, containerID string) (*cid.ID, error) {
+	cnrID := new(cid.ID)
+	err := cnrID.DecodeString(containerID)
+	if err != nil {
+		cnrID, err = h.containerResolver.Resolve(ctx, containerID)
+		if err != nil && strings.Contains(err.Error(), "not found") {
+			err = fmt.Errorf("%w: %s", new(apistatus.ContainerNotFound), err.Error())
+		}
+	}
+	return cnrID, err
+}
+
+func (h *Handler) getBucketInfo(ctx context.Context, containerName string, log *zap.Logger) (*data.BucketInfo, error) {
+	ns, err := middleware.GetNamespace(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	if bktInfo := h.cache.Get(ns, containerName); bktInfo != nil {
+		return bktInfo, nil
+	}
+
+	cnrID, err := h.resolveContainer(ctx, containerName)
+	if err != nil {
+		return nil, err
+	}
+
+	bktInfo, err := h.readContainer(ctx, *cnrID)
+	if err != nil {
+		return nil, err
+	}
+
+	if err = h.cache.Put(bktInfo); err != nil {
+		log.Warn(logs.CouldntPutBucketIntoCache,
+			zap.String("bucket name", bktInfo.Name),
+			zap.Stringer("bucket cid", bktInfo.CID),
+			zap.Error(err))
+	}
+
+	return bktInfo, nil
+}
+
+func (h *Handler) readContainer(ctx context.Context, cnrID cid.ID) (*data.BucketInfo, error) {
+	prm := pool.PrmContainerGet{ContainerID: cnrID}
+	res, err := h.pool.GetContainer(ctx, prm)
+	if err != nil {
+		return nil, fmt.Errorf("get frostfs container '%s': %w", cnrID.String(), err)
+	}
+
+	bktInfo := &data.BucketInfo{
+		CID:  cnrID,
+		Name: cnrID.EncodeToString(),
+	}
+
+	if domain := container.ReadDomain(res); domain.Name() != "" {
+		bktInfo.Name = domain.Name()
+		bktInfo.Zone = domain.Zone()
+	}
+
+	bktInfo.HomomorphicHashDisabled = container.IsHomomorphicHashingDisabled(res)
+
+	return bktInfo, err
+}

internal/handler/head.go

@@ -1,13 +1,13 @@
-package downloader
+package handler
 
 import (
+	"context"
 	"io"
 	"net/http"
 	"strconv"
 	"time"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -25,15 +25,10 @@ const (
 	hdrContainerID = "X-Container-Id"
 )
 
-func (r request) headObject(clnt *pool.Pool, objectAddress oid.Address) {
+func (h *Handler) headObject(ctx context.Context, req request, objectAddress oid.Address) {
 	var start = time.Now()
-	if err := tokens.StoreBearerToken(r.RequestCtx); err != nil {
-		r.log.Error("could not fetch and store bearer token", zap.Error(err))
-		response.Error(r.RequestCtx, "could not fetch and store bearer token", fasthttp.StatusBadRequest)
-		return
-	}
 
-	btoken := bearerToken(r.RequestCtx)
+	btoken := bearerToken(ctx)
 
 	var prm pool.PrmObjectHead
 	prm.SetAddress(objectAddress)
@@ -41,13 +36,13 @@ func (r request) headObject(clnt *pool.Pool, objectAddress oid.Address) {
 		prm.UseBearer(*btoken)
 	}
 
-	obj, err := clnt.HeadObject(r.appCtx, prm)
+	obj, err := h.pool.HeadObject(ctx, prm)
 	if err != nil {
-		r.handleFrostFSErr(err, start)
+		req.handleFrostFSErr(err, start)
 		return
 	}
 
-	r.Response.Header.Set(fasthttp.HeaderContentLength, strconv.FormatUint(obj.PayloadSize(), 10))
+	req.Response.Header.Set(fasthttp.HeaderContentLength, strconv.FormatUint(obj.PayloadSize(), 10))
 	var contentType string
 	for _, attr := range obj.Attributes() {
 		key := attr.Key()
@@ -58,24 +53,24 @@ func (r request) headObject(clnt *pool.Pool, objectAddress oid.Address) {
 
 		key = utils.BackwardTransformIfSystem(key)
 
-		r.Response.Header.Set(utils.UserAttributeHeaderPrefix+key, val)
+		req.Response.Header.Set(utils.UserAttributeHeaderPrefix+key, val)
 		switch key {
 		case object.AttributeTimestamp:
 			value, err := strconv.ParseInt(val, 10, 64)
 			if err != nil {
-				r.log.Info("couldn't parse creation date",
+				req.log.Info(logs.CouldntParseCreationDate,
 					zap.String("key", key),
 					zap.String("val", val),
 					zap.Error(err))
 				continue
 			}
-			r.Response.Header.Set(fasthttp.HeaderLastModified, time.Unix(value, 0).UTC().Format(http.TimeFormat))
+			req.Response.Header.Set(fasthttp.HeaderLastModified, time.Unix(value, 0).UTC().Format(http.TimeFormat))
 		case object.AttributeContentType:
 			contentType = val
 		}
 	}
 
-	idsToResponse(&r.Response, &obj)
+	idsToResponse(&req.Response, &obj)
 
 	if len(contentType) == 0 {
 		contentType, _, err = readContentType(obj.PayloadSize(), func(sz uint64) (io.Reader, error) {
@@ -86,18 +81,18 @@ func (r request) headObject(clnt *pool.Pool, objectAddress oid.Address) {
 				prmRange.UseBearer(*btoken)
 			}
 
-			resObj, err := clnt.ObjectRange(r.appCtx, prmRange)
+			resObj, err := h.pool.ObjectRange(ctx, prmRange)
 			if err != nil {
 				return nil, err
 			}
 			return &resObj, nil
 		})
 		if err != nil && err != io.EOF {
-			r.handleFrostFSErr(err, start)
+			req.handleFrostFSErr(err, start)
 			return
 		}
 	}
-	r.SetContentType(contentType)
+	req.SetContentType(contentType)
 }
 
 func idsToResponse(resp *fasthttp.Response, obj *object.Object) {
@@ -108,12 +103,20 @@ func idsToResponse(resp *fasthttp.Response, obj *object.Object) {
 	resp.Header.Set(hdrContainerID, cnrID.String())
 }
 
-// HeadByAddress handles head requests using simple cid/oid format.
-func (d *Downloader) HeadByAddress(c *fasthttp.RequestCtx) {
-	d.byAddress(c, request.headObject)
+// HeadByAddressOrBucketName handles head requests using simple cid/oid or bucketname/key format.
+func (h *Handler) HeadByAddressOrBucketName(c *fasthttp.RequestCtx) {
+	test, _ := c.UserValue("oid").(string)
+	var id oid.ID
+
+	err := id.DecodeString(test)
+	if err != nil {
+		h.byObjectName(c, h.headObject)
+	} else {
+		h.byAddress(c, h.headObject)
+	}
 }
 
 // HeadByAttribute handles attribute-based head requests.
-func (d *Downloader) HeadByAttribute(c *fasthttp.RequestCtx) {
-	d.byAttribute(c, request.headObject)
+func (h *Handler) HeadByAttribute(c *fasthttp.RequestCtx) {
+	h.byAttribute(c, h.headObject)
 }

internal/handler/middleware/util.go

@@ -0,0 +1,26 @@
+package middleware
+
+import (
+	"context"
+	"fmt"
+)
+
+// keyWrapper is wrapper for context keys.
+type keyWrapper string
+
+const nsKey = keyWrapper("namespace")
+
+// GetNamespace extract namespace from context.
+func GetNamespace(ctx context.Context) (string, error) {
+	ns, ok := ctx.Value(nsKey).(string)
+	if !ok {
+		return "", fmt.Errorf("couldn't get namespace from context")
+	}
+
+	return ns, nil
+}
+
+// SetNamespace sets namespace in the context.
+func SetNamespace(ctx context.Context, ns string) context.Context {
+	return context.WithValue(ctx, nsKey, ns)
+}

internal/handler/multipart.go

@@ -1,9 +1,10 @@
-package uploader
+package handler
 
 import (
 	"io"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/uploader/multipart"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/multipart"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"go.uber.org/zap"
 )
 
@@ -28,7 +29,7 @@ func fetchMultipartFile(l *zap.Logger, r io.Reader, boundary string) (MultipartF
 
 		name := part.FormName()
 		if name == "" {
-			l.Debug("ignore part, empty form name")
+			l.Debug(logs.IgnorePartEmptyFormName)
 			continue
 		}
 
@@ -36,7 +37,7 @@ func fetchMultipartFile(l *zap.Logger, r io.Reader, boundary string) (MultipartF
 
 		// ignore multipart/form-data values
 		if filename == "" {
-			l.Debug("ignore part, empty filename", zap.String("form", name))
+			l.Debug(logs.IgnorePartEmptyFilename, zap.String("form", name))
 
 			continue
 		}

internal/handler/multipart_test.go

@@ -1,6 +1,6 @@
 //go:build !integration
 
-package uploader
+package handler
 
 import (
 	"crypto/rand"
@@ -10,6 +10,7 @@ import (
 	"os"
 	"testing"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 )
@@ -111,7 +112,7 @@ func fetchMultipartFileDefault(l *zap.Logger, r io.Reader, boundary string) (Mul
 
 		name := part.FormName()
 		if name == "" {
-			l.Debug("ignore part, empty form name")
+			l.Debug(logs.IgnorePartEmptyFormName)
 			continue
 		}
 
@@ -119,7 +120,7 @@ func fetchMultipartFileDefault(l *zap.Logger, r io.Reader, boundary string) (Mul
 
 		// ignore multipart/form-data values
 		if filename == "" {
-			l.Debug("ignore part, empty filename", zap.String("form", name))
+			l.Debug(logs.IgnorePartEmptyFilename, zap.String("form", name))
 
 			continue
 		}

internal/handler/reader.go

@@ -0,0 +1,141 @@
+package handler
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"net/http"
+	"path"
+	"strconv"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	"github.com/valyala/fasthttp"
+	"go.uber.org/zap"
+)
+
+type readCloser struct {
+	io.Reader
+	io.Closer
+}
+
+// initializes io.Reader with the limited size and detects Content-Type from it.
+// Returns r's error directly. Also returns the processed data.
+func readContentType(maxSize uint64, rInit func(uint64) (io.Reader, error)) (string, []byte, error) {
+	if maxSize > sizeToDetectType {
+		maxSize = sizeToDetectType
+	}
+
+	buf := make([]byte, maxSize) // maybe sync-pool the slice?
+
+	r, err := rInit(maxSize)
+	if err != nil {
+		return "", nil, err
+	}
+
+	n, err := r.Read(buf)
+	if err != nil && err != io.EOF {
+		return "", nil, err
+	}
+
+	buf = buf[:n]
+
+	return http.DetectContentType(buf), buf, err // to not lose io.EOF
+}
+
+func (h *Handler) receiveFile(ctx context.Context, req request, objectAddress oid.Address) {
+	var (
+		err      error
+		dis      = "inline"
+		start    = time.Now()
+		filename string
+	)
+
+	var prm pool.PrmObjectGet
+	prm.SetAddress(objectAddress)
+	if btoken := bearerToken(ctx); btoken != nil {
+		prm.UseBearer(*btoken)
+	}
+
+	rObj, err := h.pool.GetObject(ctx, prm)
+	if err != nil {
+		req.handleFrostFSErr(err, start)
+		return
+	}
+
+	// we can't close reader in this function, so how to do it?
+
+	if req.Request.URI().QueryArgs().GetBool("download") {
+		dis = "attachment"
+	}
+
+	payloadSize := rObj.Header.PayloadSize()
+
+	req.Response.Header.Set(fasthttp.HeaderContentLength, strconv.FormatUint(payloadSize, 10))
+	var contentType string
+	for _, attr := range rObj.Header.Attributes() {
+		key := attr.Key()
+		val := attr.Value()
+		if !isValidToken(key) || !isValidValue(val) {
+			continue
+		}
+
+		key = utils.BackwardTransformIfSystem(key)
+
+		req.Response.Header.Set(utils.UserAttributeHeaderPrefix+key, val)
+		switch key {
+		case object.AttributeFileName:
+			filename = val
+		case object.AttributeTimestamp:
+			value, err := strconv.ParseInt(val, 10, 64)
+			if err != nil {
+				req.log.Info(logs.CouldntParseCreationDate,
+					zap.String("key", key),
+					zap.String("val", val),
+					zap.Error(err))
+				continue
+			}
+			req.Response.Header.Set(fasthttp.HeaderLastModified,
+				time.Unix(value, 0).UTC().Format(http.TimeFormat))
+		case object.AttributeContentType:
+			contentType = val
+		}
+	}
+
+	idsToResponse(&req.Response, &rObj.Header)
+
+	if len(contentType) == 0 {
+		// determine the Content-Type from the payload head
+		var payloadHead []byte
+
+		contentType, payloadHead, err = readContentType(payloadSize, func(uint64) (io.Reader, error) {
+			return rObj.Payload, nil
+		})
+		if err != nil && err != io.EOF {
+			req.log.Error(logs.CouldNotDetectContentTypeFromPayload, zap.Error(err))
+			response.Error(req.RequestCtx, "could not detect Content-Type from payload: "+err.Error(), fasthttp.StatusBadRequest)
+			return
+		}
+
+		// reset payload reader since a part of the data has been read
+		var headReader io.Reader = bytes.NewReader(payloadHead)
+
+		if err != io.EOF { // otherwise, we've already read full payload
+			headReader = io.MultiReader(headReader, rObj.Payload)
+		}
+
+		// note: we could do with io.Reader, but SetBodyStream below closes body stream
+		// if it implements io.Closer and that's useful for us.
+		rObj.Payload = readCloser{headReader, rObj.Payload}
+	}
+	req.SetContentType(contentType)
+
+	req.Response.Header.Set(fasthttp.HeaderContentDisposition, dis+"; filename="+path.Base(filename))
+
+	req.Response.SetBodyStream(rObj.Payload, int(payloadSize))
+}

internal/handler/reader_test.go

@@ -1,6 +1,6 @@
 //go:build !integration
 
-package downloader
+package handler
 
 import (
 	"io"

internal/handler/upload.go

@@ -1,4 +1,4 @@
-package uploader
+package handler
 
 import (
 	"context"
@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"time"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
@@ -16,9 +16,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/valyala/fasthttp"
-	"go.uber.org/atomic"
 	"go.uber.org/zap"
 )
 
@@ -27,64 +25,41 @@ const (
 	drainBufSize = 4096
 )
 
-// Uploader is an upload request handler.
-type Uploader struct {
-	appCtx            context.Context
-	log               *zap.Logger
-	pool              *pool.Pool
-	ownerID           *user.ID
-	settings          *Settings
-	containerResolver *resolver.ContainerResolver
+type putResponse struct {
+	ObjectID    string `json:"object_id"`
+	ContainerID string `json:"container_id"`
 }
 
-// Settings stores reloading parameters, so it has to provide atomic getters and setters.
-type Settings struct {
-	defaultTimestamp atomic.Bool
+func newPutResponse(addr oid.Address) *putResponse {
+	return &putResponse{
+		ObjectID:    addr.Object().EncodeToString(),
+		ContainerID: addr.Container().EncodeToString(),
+	}
 }
 
-func (s *Settings) DefaultTimestamp() bool {
-	return s.defaultTimestamp.Load()
-}
-
-func (s *Settings) SetDefaultTimestamp(val bool) {
-	s.defaultTimestamp.Store(val)
-}
-
-// New creates a new Uploader using specified logger, connection pool and
-// other options.
-func New(ctx context.Context, params *utils.AppParams, settings *Settings) *Uploader {
-	return &Uploader{
-		appCtx:            ctx,
-		log:               params.Logger,
-		pool:              params.Pool,
-		ownerID:           params.Owner,
-		settings:          settings,
-		containerResolver: params.Resolver,
-	}
+func (pr *putResponse) encode(w io.Writer) error {
+	enc := json.NewEncoder(w)
+	enc.SetIndent("", "\t")
+	return enc.Encode(pr)
 }
 
 // Upload handles multipart upload request.
-func (u *Uploader) Upload(c *fasthttp.RequestCtx) {
+func (h *Handler) Upload(req *fasthttp.RequestCtx) {
 	var (
 		file       MultipartFile
 		idObj      oid.ID
 		addr       oid.Address
-		scid, _    = c.UserValue("cid").(string)
-		log        = u.log.With(zap.String("cid", scid))
-		bodyStream = c.RequestBodyStream()
+		scid, _    = req.UserValue("cid").(string)
+		log        = h.log.With(zap.String("cid", scid))
+		bodyStream = req.RequestBodyStream()
 		drainBuf   = make([]byte, drainBufSize)
 	)
 
-	if err := tokens.StoreBearerToken(c); err != nil {
-		log.Error("could not fetch bearer token", zap.Error(err))
-		response.Error(c, "could not fetch bearer token", fasthttp.StatusBadRequest)
-		return
-	}
+	ctx := utils.GetContextFromRequest(req)
 
-	idCnr, err := utils.GetContainerID(u.appCtx, scid, u.containerResolver)
+	bktInfo, err := h.getBucketInfo(ctx, scid, log)
 	if err != nil {
-		log.Error("wrong container id", zap.Error(err))
-		response.Error(c, "wrong container id", fasthttp.StatusBadRequest)
+		logAndSendBucketError(req, log, err)
 		return
 	}
 
@@ -95,37 +70,37 @@ func (u *Uploader) Upload(c *fasthttp.RequestCtx) {
 		}
 		err := file.Close()
 		log.Debug(
-			"close temporary multipart/form file",
+			logs.CloseTemporaryMultipartFormFile,
 			zap.Stringer("address", addr),
 			zap.String("filename", file.FileName()),
 			zap.Error(err),
 		)
 	}()
-	boundary := string(c.Request.Header.MultipartFormBoundary())
-	if file, err = fetchMultipartFile(u.log, bodyStream, boundary); err != nil {
-		log.Error("could not receive multipart/form", zap.Error(err))
-		response.Error(c, "could not receive multipart/form: "+err.Error(), fasthttp.StatusBadRequest)
+	boundary := string(req.Request.Header.MultipartFormBoundary())
+	if file, err = fetchMultipartFile(h.log, bodyStream, boundary); err != nil {
+		log.Error(logs.CouldNotReceiveMultipartForm, zap.Error(err))
+		response.Error(req, "could not receive multipart/form: "+err.Error(), fasthttp.StatusBadRequest)
 		return
 	}
-	filtered, err := filterHeaders(u.log, &c.Request.Header)
+	filtered, err := filterHeaders(h.log, &req.Request.Header)
 	if err != nil {
-		log.Error("could not process headers", zap.Error(err))
-		response.Error(c, err.Error(), fasthttp.StatusBadRequest)
+		log.Error(logs.CouldNotProcessHeaders, zap.Error(err))
+		response.Error(req, err.Error(), fasthttp.StatusBadRequest)
 		return
 	}
 
 	now := time.Now()
-	if rawHeader := c.Request.Header.Peek(fasthttp.HeaderDate); rawHeader != nil {
+	if rawHeader := req.Request.Header.Peek(fasthttp.HeaderDate); rawHeader != nil {
 		if parsed, err := time.Parse(http.TimeFormat, string(rawHeader)); err != nil {
-			log.Warn("could not parse client time", zap.String("Date header", string(rawHeader)), zap.Error(err))
+			log.Warn(logs.CouldNotParseClientTime, zap.String("Date header", string(rawHeader)), zap.Error(err))
 		} else {
 			now = parsed
 		}
 	}
 
-	if err = utils.PrepareExpirationHeader(c, u.pool, filtered, now); err != nil {
-		log.Error("could not prepare expiration header", zap.Error(err))
-		response.Error(c, "could not prepare expiration header: "+err.Error(), fasthttp.StatusBadRequest)
+	if err = utils.PrepareExpirationHeader(req, h.pool, filtered, now); err != nil {
+		log.Error(logs.CouldNotPrepareExpirationHeader, zap.Error(err))
+		response.Error(req, "could not prepare expiration header: "+err.Error(), fasthttp.StatusBadRequest)
 		return
 	}
 
@@ -145,39 +120,42 @@ func (u *Uploader) Upload(c *fasthttp.RequestCtx) {
 		attributes = append(attributes, *filename)
 	}
 	// sets Timestamp attribute if it wasn't set from header and enabled by settings
-	if _, ok := filtered[object.AttributeTimestamp]; !ok && u.settings.DefaultTimestamp() {
+	if _, ok := filtered[object.AttributeTimestamp]; !ok && h.config.DefaultTimestamp() {
 		timestamp := object.NewAttribute()
 		timestamp.SetKey(object.AttributeTimestamp)
 		timestamp.SetValue(strconv.FormatInt(time.Now().Unix(), 10))
 		attributes = append(attributes, *timestamp)
 	}
-	id, bt := u.fetchOwnerAndBearerToken(c)
 
 	obj := object.New()
-	obj.SetContainerID(*idCnr)
-	obj.SetOwnerID(id)
+	obj.SetContainerID(bktInfo.CID)
+	obj.SetOwnerID(h.ownerID)
 	obj.SetAttributes(attributes...)
 
 	var prm pool.PrmObjectPut
 	prm.SetHeader(*obj)
 	prm.SetPayload(file)
+	prm.SetClientCut(h.config.ClientCut())
+	prm.SetBufferMaxSize(h.config.BufferMaxSizeForPut())
+	prm.WithoutHomomorphicHash(bktInfo.HomomorphicHashDisabled)
 
+	bt := h.fetchBearerToken(ctx)
 	if bt != nil {
 		prm.UseBearer(*bt)
 	}
 
-	if idObj, err = u.pool.PutObject(u.appCtx, prm); err != nil {
-		u.handlePutFrostFSErr(c, err)
+	if idObj, err = h.pool.PutObject(ctx, prm); err != nil {
+		h.handlePutFrostFSErr(req, err)
 		return
 	}
 
 	addr.SetObject(idObj)
-	addr.SetContainer(*idCnr)
+	addr.SetContainer(bktInfo.CID)
 
 	// Try to return the response, otherwise, if something went wrong, throw an error.
-	if err = newPutResponse(addr).encode(c); err != nil {
-		log.Error("could not encode response", zap.Error(err))
-		response.Error(c, "could not encode response", fasthttp.StatusBadRequest)
+	if err = newPutResponse(addr).encode(req); err != nil {
+		log.Error(logs.CouldNotEncodeResponse, zap.Error(err))
+		response.Error(req, "could not encode response", fasthttp.StatusBadRequest)
 
 		return
 	}
@@ -194,40 +172,21 @@ func (u *Uploader) Upload(c *fasthttp.RequestCtx) {
 		}
 	}
 	// Report status code and content type.
-	c.Response.SetStatusCode(fasthttp.StatusOK)
-	c.Response.Header.SetContentType(jsonHeader)
+	req.Response.SetStatusCode(fasthttp.StatusOK)
+	req.Response.Header.SetContentType(jsonHeader)
 }
 
-func (u *Uploader) handlePutFrostFSErr(r *fasthttp.RequestCtx, err error) {
+func (h *Handler) handlePutFrostFSErr(r *fasthttp.RequestCtx, err error) {
 	statusCode, msg, additionalFields := response.FormErrorResponse("could not store file in frostfs", err)
 	logFields := append([]zap.Field{zap.Error(err)}, additionalFields...)
 
-	u.log.Error("could not store file in frostfs", logFields...)
+	h.log.Error(logs.CouldNotStoreFileInFrostfs, logFields...)
 	response.Error(r, msg, statusCode)
 }
 
-func (u *Uploader) fetchOwnerAndBearerToken(ctx context.Context) (*user.ID, *bearer.Token) {
+func (h *Handler) fetchBearerToken(ctx context.Context) *bearer.Token {
 	if tkn, err := tokens.LoadBearerToken(ctx); err == nil && tkn != nil {
-		issuer := bearer.ResolveIssuer(*tkn)
-		return &issuer, tkn
+		return tkn
 	}
-	return u.ownerID, nil
-}
-
-type putResponse struct {
-	ObjectID    string `json:"object_id"`
-	ContainerID string `json:"container_id"`
-}
-
-func newPutResponse(addr oid.Address) *putResponse {
-	return &putResponse{
-		ObjectID:    addr.Object().EncodeToString(),
-		ContainerID: addr.Container().EncodeToString(),
-	}
-}
-
-func (pr *putResponse) encode(w io.Writer) error {
-	enc := json.NewEncoder(w)
-	enc.SetIndent("", "\t")
-	return enc.Encode(pr)
+	return nil
 }

internal/handler/utils.go

@@ -0,0 +1,71 @@
+package handler
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
+	"github.com/valyala/fasthttp"
+	"go.uber.org/zap"
+)
+
+type request struct {
+	*fasthttp.RequestCtx
+	log *zap.Logger
+}
+
+func (r *request) handleFrostFSErr(err error, start time.Time) {
+	logFields := []zap.Field{
+		zap.Stringer("elapsed", time.Since(start)),
+		zap.Error(err),
+	}
+	statusCode, msg, additionalFields := response.FormErrorResponse("could not receive object", err)
+	logFields = append(logFields, additionalFields...)
+
+	r.log.Error(logs.CouldNotReceiveObject, logFields...)
+	response.Error(r.RequestCtx, msg, statusCode)
+}
+
+func bearerToken(ctx context.Context) *bearer.Token {
+	if tkn, err := tokens.LoadBearerToken(ctx); err == nil {
+		return tkn
+	}
+	return nil
+}
+
+func isValidToken(s string) bool {
+	for _, c := range s {
+		if c <= ' ' || c > 127 {
+			return false
+		}
+		if strings.ContainsRune("()<>@,;:\\\"/[]?={}", c) {
+			return false
+		}
+	}
+	return true
+}
+
+func isValidValue(s string) bool {
+	for _, c := range s {
+		// HTTP specification allows for more technically, but we don't want to escape things.
+		if c < ' ' || c > 127 || c == '"' {
+			return false
+		}
+	}
+	return true
+}
+
+func logAndSendBucketError(c *fasthttp.RequestCtx, log *zap.Logger, err error) {
+	log.Error(logs.CouldntGetBucket, zap.Error(err))
+
+	if client.IsErrContainerNotFound(err) {
+		response.Error(c, "Not Found", fasthttp.StatusNotFound)
+		return
+	}
+	response.Error(c, "could not get bucket: "+err.Error(), fasthttp.StatusBadRequest)
+}

internal/logs/logs.go

@@ -0,0 +1,80 @@
+package logs
+
+const (
+	CouldntParseCreationDate                                              = "couldn't parse creation date"                                                           // Info in ../../downloader/*
+	CouldNotDetectContentTypeFromPayload                                  = "could not detect Content-Type from payload"                                             // Error in ../../downloader/download.go
+	CouldNotReceiveObject                                                 = "could not receive object"                                                               // Error in ../../downloader/download.go
+	WrongObjectID                                                         = "wrong object id"                                                                        // Error in ../../downloader/download.go
+	GetLatestObjectVersion                                                = "get latest object version"                                                              // Error in ../../downloader/download.go
+	ObjectWasDeleted                                                      = "object was deleted"                                                                     // Error in ../../downloader/download.go
+	CouldNotSearchForObjects                                              = "could not search for objects"                                                           // Error in ../../downloader/download.go
+	ObjectNotFound                                                        = "object not found"                                                                       // Error in ../../downloader/download.go
+	ReadObjectListFailed                                                  = "read object list failed"                                                                // Error in ../../downloader/download.go
+	FailedToAddObjectToArchive                                            = "failed to add object to archive"                                                        // Error in ../../downloader/download.go
+	IteratingOverSelectedObjectsFailed                                    = "iterating over selected objects failed"                                                 // Error in ../../downloader/download.go
+	ObjectsNotFound                                                       = "objects not found"                                                                      // Error in ../../downloader/download.go
+	CloseZipWriter                                                        = "close zip writer"                                                                       // Error in ../../downloader/download.go
+	ServiceIsRunning                                                      = "service is running"                                                                     // Info in ../../metrics/service.go
+	ServiceCouldntStartOnConfiguredPort                                   = "service couldn't start on configured port"                                              // Warn in ../../metrics/service.go
+	ServiceHasntStartedSinceItsDisabled                                   = "service hasn't started since it's disabled"                                             // Info in ../../metrics/service.go
+	ShuttingDownService                                                   = "shutting down service"                                                                  // Info in ../../metrics/service.go
+	CantShutDownService                                                   = "can't shut down service"                                                                // Panic in ../../metrics/service.go
+	CantGracefullyShutDownService                                         = "can't gracefully shut down service, force stop"                                         // Error in ../../metrics/service.go
+	IgnorePartEmptyFormName                                               = "ignore part, empty form name"                                                           // Debug in ../../uploader/upload.go
+	IgnorePartEmptyFilename                                               = "ignore part, empty filename"                                                            // Debug in ../../uploader/upload.go
+	CloseTemporaryMultipartFormFile                                       = "close temporary multipart/form file"                                                    // Debug in ../../uploader/upload.go
+	CouldNotReceiveMultipartForm                                          = "could not receive multipart/form"                                                       // Error in ../../uploader/upload.go
+	CouldNotProcessHeaders                                                = "could not process headers"                                                              // Error in ../../uploader/upload.go
+	CouldNotParseClientTime                                               = "could not parse client time"                                                            // Warn in ../../uploader/upload.go
+	CouldNotPrepareExpirationHeader                                       = "could not prepare expiration header"                                                    // Error in ../../uploader/upload.go
+	CouldNotEncodeResponse                                                = "could not encode response"                                                              // Error in ../../uploader/upload.go
+	CouldNotStoreFileInFrostfs                                            = "could not store file in frostfs"                                                        // Error in ../../uploader/upload.go
+	AddAttributeToResultObject                                            = "add attribute to result object"                                                         // Debug in ../../uploader/filter.go
+	FailedToCreateResolver                                                = "failed to create resolver"                                                              // Fatal in ../../app.go
+	ContainerResolverWillBeDisabledBecauseOfResolversResolverOrderIsEmpty = "container resolver will be disabled because of resolvers 'resolver_order' is empty"     // Info in ../../app.go
+	MetricsAreDisabled                                                    = "metrics are disabled"                                                                   // Warn in ../../app.go
+	NoWalletPathSpecifiedCreatingEphemeralKeyAutomaticallyForThisRun      = "no wallet path specified, creating ephemeral key automatically for this run"            // Info in ../../app.go
+	StartingApplication                                                   = "starting application"                                                                   // Info in ../../app.go
+	StartingServer                                                        = "starting server"                                                                        // Info in ../../app.go
+	ListenAndServe                                                        = "listen and serve"                                                                       // Fatal in ../../app.go
+	ShuttingDownWebServer                                                 = "shutting down web server"                                                               // Info in ../../app.go
+	FailedToShutdownTracing                                               = "failed to shutdown tracing"                                                             // Warn in ../../app.go
+	SIGHUPConfigReloadStarted                                             = "SIGHUP config reload started"                                                           // Info in ../../app.go
+	FailedToReloadConfigBecauseItsMissed                                  = "failed to reload config because it's missed"                                            // Warn in ../../app.go
+	FailedToReloadConfig                                                  = "failed to reload config"                                                                // Warn in ../../app.go
+	LogLevelWontBeUpdated                                                 = "log level won't be updated"                                                             // Warn in ../../app.go
+	FailedToUpdateResolvers                                               = "failed to update resolvers"                                                             // Warn in ../../app.go
+	FailedToReloadServerParameters                                        = "failed to reload server parameters"                                                     // Warn in ../../app.go
+	SIGHUPConfigReloadCompleted                                           = "SIGHUP config reload completed"                                                         // Info in ../../app.go
+	AddedPathUploadCid                                                    = "added path /upload/{cid}"                                                               // Info in ../../app.go
+	AddedPathGetCidOid                                                    = "added path /get/{cid}/{oid}"                                                            // Info in ../../app.go
+	AddedPathGetByAttributeCidAttrKeyAttrVal                              = "added path /get_by_attribute/{cid}/{attr_key}/{attr_val:*}"                             // Info in ../../app.go
+	AddedPathZipCidPrefix                                                 = "added path /zip/{cid}/{prefix}"                                                         // Info in ../../app.go
+	Request                                                               = "request"                                                                                // Info in ../../app.go
+	CouldNotFetchAndStoreBearerToken                                      = "could not fetch and store bearer token"                                                 // Error in ../../app.go
+	FailedToAddServer                                                     = "failed to add server"                                                                   // Warn in ../../app.go
+	AddServer                                                             = "add server"                                                                             // Info in ../../app.go
+	NoHealthyServers                                                      = "no healthy servers"                                                                     // Fatal in ../../app.go
+	FailedToInitializeTracing                                             = "failed to initialize tracing"                                                           // Warn in ../../app.go
+	TracingConfigUpdated                                                  = "tracing config updated"                                                                 // Info in ../../app.go
+	ResolverNNSWontBeUsedSinceRPCEndpointIsntProvided                     = "resolver nns won't be used since rpc_endpoint isn't provided"                           // Warn in ../../app.go
+	RuntimeSoftMemoryDefinedWithGOMEMLIMIT                                = "soft runtime memory defined with GOMEMLIMIT environment variable, config value skipped" // Warn in ../../app.go
+	RuntimeSoftMemoryLimitUpdated                                         = "soft runtime memory limit value updated"                                                // Info in ../../app.go
+	CouldNotLoadFrostFSPrivateKey                                         = "could not load FrostFS private key"                                                     // Fatal in ../../settings.go
+	UsingCredentials                                                      = "using credentials"                                                                      // Info in ../../settings.go
+	FailedToCreateConnectionPool                                          = "failed to create connection pool"                                                       // Fatal in ../../settings.go
+	FailedToDialConnectionPool                                            = "failed to dial connection pool"                                                         // Fatal in ../../settings.go
+	FailedToCreateTreePool                                                = "failed to create tree pool"                                                             // Fatal in ../../settings.go
+	FailedToDialTreePool                                                  = "failed to dial tree pool"                                                               // Fatal in ../../settings.go
+	AddedStoragePeer                                                      = "added storage peer"                                                                     // Info in ../../settings.go
+	CouldntGetBucket                                                      = "could not get bucket"                                                                   // Error in ../handler/utils.go
+	CouldntPutBucketIntoCache                                             = "couldn't put bucket info into cache"                                                    // Warn in ../handler/handler.go
+	InvalidCacheEntryType                                                 = "invalid cache entry type"                                                               // Warn in ../cache/buckets.go
+	InvalidLifetimeUsingDefaultValue                                      = "invalid lifetime, using default value (in seconds)"                                     // Error in ../../cmd/http-gw/settings.go
+	InvalidCacheSizeUsingDefaultValue                                     = "invalid cache size, using default value"                                                // Error in ../../cmd/http-gw/settings.go
+	FailedToUnescapeQuery                                                 = "failed to unescape query"
+	ServerReconnecting                                                    = "reconnecting server..."
+	ServerReconnectedSuccessfully                                         = "server reconnected successfully"
+	ServerReconnectFailed                                                 = "failed to reconnect server"
+	WarnDuplicateAddress                                                  = "duplicate address"
+)

metrics/desc.go

@@ -0,0 +1,150 @@
+package metrics
+
+import (
+	"encoding/json"
+
+	"github.com/prometheus/client_golang/prometheus"
+	dto "github.com/prometheus/client_model/go"
+)
+
+var appMetricsDesc = map[string]map[string]Description{
+	poolSubsystem: {
+		overallErrorsMetric: Description{
+			Type:      dto.MetricType_GAUGE,
+			Namespace: namespace,
+			Subsystem: poolSubsystem,
+			Name:      overallErrorsMetric,
+			Help:      "Total number of errors in pool",
+		},
+		overallNodeErrorsMetric: Description{
+			Type:           dto.MetricType_GAUGE,
+			Namespace:      namespace,
+			Subsystem:      poolSubsystem,
+			Name:           overallNodeErrorsMetric,
+			Help:           "Total number of errors for connection in pool",
+			VariableLabels: []string{"node"},
+		},
+		overallNodeRequestsMetric: Description{
+			Type:           dto.MetricType_GAUGE,
+			Namespace:      namespace,
+			Subsystem:      poolSubsystem,
+			Name:           overallNodeRequestsMetric,
+			Help:           "Total number of requests to specific node in pool",
+			VariableLabels: []string{"node"},
+		},
+		currentErrorMetric: Description{
+			Type:           dto.MetricType_GAUGE,
+			Namespace:      namespace,
+			Subsystem:      poolSubsystem,
+			Name:           currentErrorMetric,
+			Help:           "Number of errors on current connections that will be reset after the threshold",
+			VariableLabels: []string{"node"},
+		},
+		avgRequestDurationMetric: Description{
+			Type:           dto.MetricType_GAUGE,
+			Namespace:      namespace,
+			Subsystem:      poolSubsystem,
+			Name:           avgRequestDurationMetric,
+			Help:           "Average request duration (in milliseconds) for specific method on node in pool",
+			VariableLabels: []string{"node", "method"},
+		},
+	},
+	stateSubsystem: {
+		healthMetric: Description{
+			Type:      dto.MetricType_GAUGE,
+			Namespace: namespace,
+			Subsystem: stateSubsystem,
+			Name:      healthMetric,
+			Help:      "Current HTTP gateway state",
+		},
+		versionInfoMetric: Description{
+			Type:           dto.MetricType_GAUGE,
+			Namespace:      namespace,
+			Subsystem:      stateSubsystem,
+			Name:           versionInfoMetric,
+			Help:           "Version of current FrostFS HTTP Gate instance",
+			VariableLabels: []string{"version"},
+		},
+	},
+	serverSubsystem: {
+		healthMetric: Description{
+			Type:           dto.MetricType_GAUGE,
+			Namespace:      namespace,
+			Subsystem:      serverSubsystem,
+			Name:           healthMetric,
+			Help:           "HTTP Server endpoint health",
+			VariableLabels: []string{"endpoint"},
+		},
+	},
+}
+
+type Description struct {
+	Type           dto.MetricType
+	Namespace      string
+	Subsystem      string
+	Name           string
+	Help           string
+	ConstantLabels prometheus.Labels
+	VariableLabels []string
+}
+
+func (d *Description) MarshalJSON() ([]byte, error) {
+	return json.Marshal(&struct {
+		Type           string            `json:"type"`
+		FQName         string            `json:"name"`
+		Help           string            `json:"help"`
+		ConstantLabels prometheus.Labels `json:"constant_labels,omitempty"`
+		VariableLabels []string          `json:"variable_labels,omitempty"`
+	}{
+		Type:           d.Type.String(),
+		FQName:         d.BuildFQName(),
+		Help:           d.Help,
+		ConstantLabels: d.ConstantLabels,
+		VariableLabels: d.VariableLabels,
+	})
+}
+
+func (d *Description) BuildFQName() string {
+	return prometheus.BuildFQName(d.Namespace, d.Subsystem, d.Name)
+}
+
+// DescribeAll returns descriptions for metrics.
+func DescribeAll() []Description {
+	var list []Description
+	for _, m := range appMetricsDesc {
+		for _, description := range m {
+			list = append(list, description)
+		}
+	}
+
+	return list
+}
+
+func newOpts(description Description) prometheus.Opts {
+	return prometheus.Opts{
+		Namespace:   description.Namespace,
+		Subsystem:   description.Subsystem,
+		Name:        description.Name,
+		Help:        description.Help,
+		ConstLabels: description.ConstantLabels,
+	}
+}
+
+func mustNewGauge(description Description) prometheus.Gauge {
+	if description.Type != dto.MetricType_GAUGE {
+		panic("invalid metric type")
+	}
+	return prometheus.NewGauge(
+		prometheus.GaugeOpts(newOpts(description)),
+	)
+}
+
+func mustNewGaugeVec(description Description) *prometheus.GaugeVec {
+	if description.Type != dto.MetricType_GAUGE {
+		panic("invalid metric type")
+	}
+	return prometheus.NewGaugeVec(
+		prometheus.GaugeOpts(newOpts(description)),
+		description.VariableLabels,
+	)
+}

metrics/desc_test.go

@@ -0,0 +1,37 @@
+//go:build dump_metrics
+
+package metrics
+
+import (
+	"encoding/json"
+	"flag"
+	"os"
+	"testing"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	"github.com/stretchr/testify/require"
+)
+
+type mock struct{}
+
+func (m mock) Statistic() pool.Statistic {
+	return pool.Statistic{}
+}
+
+var metricsPath = flag.String("out", "", "File to export http gateway metrics to.")
+
+func TestDescribeAll(t *testing.T) {
+	// to check correct metrics type mapping
+	_ = NewGateMetrics(mock{})
+
+	flag.Parse()
+
+	require.NotEmpty(t, metricsPath, "flag 'out' must be provided to dump metrics description")
+
+	desc := DescribeAll()
+	data, err := json.Marshal(desc)
+	require.NoError(t, err)
+
+	err = os.WriteFile(*metricsPath, data, 0644)
+	require.NoError(t, err)
+}

metrics/metrics.go

@@ -13,7 +13,23 @@ const (
 	namespace       = "frostfs_http_gw"
 	stateSubsystem  = "state"
 	poolSubsystem   = "pool"
+	serverSubsystem = "server"
+)
 
+const (
+	healthMetric      = "health"
+	versionInfoMetric = "version_info"
+)
+
+const (
+	overallErrorsMetric       = "overall_errors"
+	overallNodeErrorsMetric   = "overall_node_errors"
+	overallNodeRequestsMetric = "overall_node_requests"
+	currentErrorMetric        = "current_errors"
+	avgRequestDurationMetric  = "avg_request_duration"
+)
+
+const (
 	methodGetBalance       = "get_balance"
 	methodPutContainer     = "put_container"
 	methodGetContainer     = "get_container"
@@ -41,17 +57,27 @@ const (
 	HealthStatusShuttingDown HealthStatus = 3
 )
 
+type StatisticScraper interface {
+	Statistic() pool.Statistic
+}
+
+type serverMetrics struct {
+	endpointHealth *prometheus.GaugeVec
+}
+
 type GateMetrics struct {
 	stateMetrics
 	poolMetricsCollector
+	serverMetrics
 }
 
 type stateMetrics struct {
 	healthCheck prometheus.Gauge
+	versionInfo *prometheus.GaugeVec
 }
 
 type poolMetricsCollector struct {
-	pool                *pool.Pool
+	scraper             StatisticScraper
 	overallErrors       prometheus.Gauge
 	overallNodeErrors   *prometheus.GaugeVec
 	overallNodeRequests *prometheus.GaugeVec
@@ -60,113 +86,62 @@ type poolMetricsCollector struct {
 }
 
 // NewGateMetrics creates new metrics for http gate.
-func NewGateMetrics(p *pool.Pool) *GateMetrics {
+func NewGateMetrics(p StatisticScraper) *GateMetrics {
 	stateMetric := newStateMetrics()
 	stateMetric.register()
 
 	poolMetric := newPoolMetricsCollector(p)
 	poolMetric.register()
 
+	serverMetric := newServerMetrics()
+	serverMetric.register()
+
 	return &GateMetrics{
 		stateMetrics:         *stateMetric,
 		poolMetricsCollector: *poolMetric,
+		serverMetrics:        *serverMetric,
 	}
 }
 
 func (g *GateMetrics) Unregister() {
 	g.stateMetrics.unregister()
 	prometheus.Unregister(&g.poolMetricsCollector)
+	g.serverMetrics.unregister()
 }
 
 func newStateMetrics() *stateMetrics {
 	return &stateMetrics{
-		healthCheck: prometheus.NewGauge(prometheus.GaugeOpts{
-			Namespace: namespace,
-			Subsystem: stateSubsystem,
-			Name:      "health",
-			Help:      "Current HTTP gateway state",
-		}),
+		healthCheck: mustNewGauge(appMetricsDesc[stateSubsystem][healthMetric]),
+		versionInfo: mustNewGaugeVec(appMetricsDesc[stateSubsystem][versionInfoMetric]),
 	}
 }
 
 func (m stateMetrics) register() {
 	prometheus.MustRegister(m.healthCheck)
+	prometheus.MustRegister(m.versionInfo)
 }
 
 func (m stateMetrics) unregister() {
 	prometheus.Unregister(m.healthCheck)
+	prometheus.Unregister(m.versionInfo)
 }
 
 func (m stateMetrics) SetHealth(s HealthStatus) {
 	m.healthCheck.Set(float64(s))
 }
 
-func newPoolMetricsCollector(p *pool.Pool) *poolMetricsCollector {
-	overallErrors := prometheus.NewGauge(
-		prometheus.GaugeOpts{
-			Namespace: namespace,
-			Subsystem: poolSubsystem,
-			Name:      "overall_errors",
-			Help:      "Total number of errors in pool",
-		},
-	)
-
-	overallNodeErrors := prometheus.NewGaugeVec(
-		prometheus.GaugeOpts{
-			Namespace: namespace,
-			Subsystem: poolSubsystem,
-			Name:      "overall_node_errors",
-			Help:      "Total number of errors for connection in pool",
-		},
-		[]string{
-			"node",
-		},
-	)
-
-	overallNodeRequests := prometheus.NewGaugeVec(
-		prometheus.GaugeOpts{
-			Namespace: namespace,
-			Subsystem: poolSubsystem,
-			Name:      "overall_node_requests",
-			Help:      "Total number of requests to specific node in pool",
-		},
-		[]string{
-			"node",
-		},
-	)
-
-	currentErrors := prometheus.NewGaugeVec(
-		prometheus.GaugeOpts{
-			Namespace: namespace,
-			Subsystem: poolSubsystem,
-			Name:      "current_errors",
-			Help:      "Number of errors on current connections that will be reset after the threshold",
-		},
-		[]string{
-			"node",
-		},
-	)
-
-	requestsDuration := prometheus.NewGaugeVec(
-		prometheus.GaugeOpts{
-			Namespace: namespace,
-			Subsystem: poolSubsystem,
-			Name:      "avg_request_duration",
-			Help:      "Average request duration (in milliseconds) for specific method on node in pool",
-		},
-		[]string{
-			"node",
-			"method",
-		},
-	)
+func (m stateMetrics) SetVersion(ver string) {
+	m.versionInfo.WithLabelValues(ver).Set(1)
+}
 
+func newPoolMetricsCollector(p StatisticScraper) *poolMetricsCollector {
 	return &poolMetricsCollector{
-		pool:                p,
-		overallErrors:       overallErrors,
-		overallNodeErrors:   overallNodeErrors,
-		overallNodeRequests: overallNodeRequests,
-		currentErrors:       currentErrors,
-		requestDuration:     requestsDuration,
+		scraper:             p,
+		overallErrors:       mustNewGauge(appMetricsDesc[poolSubsystem][overallErrorsMetric]),
+		overallNodeErrors:   mustNewGaugeVec(appMetricsDesc[poolSubsystem][overallNodeErrorsMetric]),
+		overallNodeRequests: mustNewGaugeVec(appMetricsDesc[poolSubsystem][overallNodeRequestsMetric]),
+		currentErrors:       mustNewGaugeVec(appMetricsDesc[poolSubsystem][currentErrorMetric]),
+		requestDuration:     mustNewGaugeVec(appMetricsDesc[poolSubsystem][avgRequestDurationMetric]),
 	}
 }
 
@@ -192,7 +167,7 @@ func (m *poolMetricsCollector) register() {
 }
 
 func (m *poolMetricsCollector) updateStatistic() {
-	stat := m.pool.Statistic()
+	stat := m.scraper.Statistic()
 
 	m.overallNodeErrors.Reset()
 	m.overallNodeRequests.Reset()
@@ -228,6 +203,28 @@ func (m *poolMetricsCollector) updateRequestsDuration(node pool.NodeStatistic) {
 	m.requestDuration.WithLabelValues(node.Address(), methodCreateSession).Set(float64(node.AverageCreateSession().Milliseconds()))
 }
 
+func newServerMetrics() *serverMetrics {
+	return &serverMetrics{
+		endpointHealth: mustNewGaugeVec(appMetricsDesc[serverSubsystem][healthMetric]),
+	}
+}
+
+func (m serverMetrics) register() {
+	prometheus.MustRegister(m.endpointHealth)
+}
+
+func (m serverMetrics) unregister() {
+	prometheus.Unregister(m.endpointHealth)
+}
+
+func (m serverMetrics) MarkHealthy(endpoint string) {
+	m.endpointHealth.WithLabelValues(endpoint).Set(float64(1))
+}
+
+func (m serverMetrics) MarkUnhealthy(endpoint string) {
+	m.endpointHealth.WithLabelValues(endpoint).Set(float64(0))
+}
+
 // NewPrometheusService creates a new service for gathering prometheus metrics.
 func NewPrometheusService(log *zap.Logger, cfg Config) *Service {
 	if log == nil {

metrics/service.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net/http"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"go.uber.org/zap"
 )
 
@@ -24,21 +25,24 @@ type Config struct {
 // Start runs http service with the exposed endpoint on the configured port.
 func (ms *Service) Start() {
 	if ms.enabled {
-		ms.log.Info("service is running", zap.String("endpoint", ms.Addr))
+		ms.log.Info(logs.ServiceIsRunning, zap.String("endpoint", ms.Addr))
 		err := ms.ListenAndServe()
 		if err != nil && err != http.ErrServerClosed {
-			ms.log.Warn("service couldn't start on configured port")
+			ms.log.Warn(logs.ServiceCouldntStartOnConfiguredPort)
 		}
 	} else {
-		ms.log.Info("service hasn't started since it's disabled")
+		ms.log.Info(logs.ServiceHasntStartedSinceItsDisabled)
 	}
 }
 
 // ShutDown stops the service.
 func (ms *Service) ShutDown(ctx context.Context) {
-	ms.log.Info("shutting down service", zap.String("endpoint", ms.Addr))
+	ms.log.Info(logs.ShuttingDownService, zap.String("endpoint", ms.Addr))
 	err := ms.Shutdown(ctx)
 	if err != nil {
-		ms.log.Panic("can't shut down service")
+		ms.log.Error(logs.CantGracefullyShutDownService, zap.Error(err))
+		if err = ms.Close(); err != nil {
+			ms.log.Panic(logs.CantShutDownService, zap.Error(err))
+		}
 	}
 }

resolver/resolver.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"sync"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/ns"
@@ -28,9 +29,14 @@ type FrostFS interface {
 	SystemDNS(context.Context) (string, error)
 }
 
+type Settings interface {
+	FormContainerZone(ns string) (zone string, isDefault bool)
+}
+
 type Config struct {
 	FrostFS    FrostFS
 	RPCAddress string
+	Settings   Settings
 }
 
 type ContainerResolver struct {
@@ -135,29 +141,43 @@ func (r *ContainerResolver) equals(resolverNames []string) bool {
 func newResolver(name string, cfg *Config) (*Resolver, error) {
 	switch name {
 	case DNSResolver:
-		return NewDNSResolver(cfg.FrostFS)
+		return NewDNSResolver(cfg.FrostFS, cfg.Settings)
 	case NNSResolver:
-		return NewNNSResolver(cfg.RPCAddress)
+		return NewNNSResolver(cfg.RPCAddress, cfg.Settings)
 	default:
 		return nil, fmt.Errorf("unknown resolver: %s", name)
 	}
 }
 
-func NewDNSResolver(frostFS FrostFS) (*Resolver, error) {
+func NewDNSResolver(frostFS FrostFS, settings Settings) (*Resolver, error) {
 	if frostFS == nil {
 		return nil, fmt.Errorf("pool must not be nil for DNS resolver")
 	}
+	if settings == nil {
+		return nil, fmt.Errorf("resolver settings must not be nil for DNS resolver")
+	}
 
 	var dns ns.DNS
 
 	resolveFunc := func(ctx context.Context, name string) (*cid.ID, error) {
-		domain, err := frostFS.SystemDNS(ctx)
+		var err error
+
+		namespace, err := middleware.GetNamespace(ctx)
+		if err != nil {
+			return nil, err
+		}
+
+		zone, isDefault := settings.FormContainerZone(namespace)
+		if isDefault {
+			zone, err = frostFS.SystemDNS(ctx)
 			if err != nil {
 				return nil, fmt.Errorf("read system DNS parameter of the FrostFS: %w", err)
 			}
+		}
 
-		domain = name + "." + domain
+		domain := name + "." + zone
 		cnrID, err := dns.ResolveContainerName(domain)
+
 		if err != nil {
 			return nil, fmt.Errorf("couldn't resolve container '%s' as '%s': %w", name, domain, err)
 		}
@@ -170,17 +190,32 @@ func NewDNSResolver(frostFS FrostFS) (*Resolver, error) {
 	}, nil
 }
 
-func NewNNSResolver(rpcAddress string) (*Resolver, error) {
+func NewNNSResolver(rpcAddress string, settings Settings) (*Resolver, error) {
+	if rpcAddress == "" {
+		return nil, fmt.Errorf("rpc address must not be empty for NNS resolver")
+	}
+	if settings == nil {
+		return nil, fmt.Errorf("resolver settings must not be nil for NNS resolver")
+	}
+
 	var nns ns.NNS
 
 	if err := nns.Dial(rpcAddress); err != nil {
 		return nil, fmt.Errorf("could not dial nns: %w", err)
 	}
 
-	resolveFunc := func(_ context.Context, name string) (*cid.ID, error) {
+	resolveFunc := func(ctx context.Context, name string) (*cid.ID, error) {
 		var d container.Domain
 		d.SetName(name)
 
+		namespace, err := middleware.GetNamespace(ctx)
+		if err != nil {
+			return nil, err
+		}
+
+		zone, _ := settings.FormContainerZone(namespace)
+		d.SetZone(zone)
+
 		cnrID, err := nns.ResolveContainerDomain(d)
 		if err != nil {
 			return nil, fmt.Errorf("couldn't resolve container '%s': %w", name, err)

tokens/bearer-token.go

@@ -13,9 +13,11 @@ import (
 
 type fromHandler = func(h *fasthttp.RequestHeader) []byte
 
+type ctxKey string
+
 const (
 	bearerTokenHdr        = "Bearer"
-	bearerTokenKey = "__context_bearer_token_key"
+	bearerTokenKey ctxKey = "__context_bearer_token_key"
 )
 
 // BearerToken usage:
@@ -48,16 +50,15 @@ func BearerTokenFromCookie(h *fasthttp.RequestHeader) []byte {
 	return auth
 }
 
-// StoreBearerToken extracts a bearer token from the header or cookie and stores
-// it in the request context.
-func StoreBearerToken(ctx *fasthttp.RequestCtx) error {
-	tkn, err := fetchBearerToken(ctx)
+// StoreBearerTokenAppCtx extracts a bearer token from the header or cookie and stores
+// it in the application context.
+func StoreBearerTokenAppCtx(ctx context.Context, req *fasthttp.RequestCtx) (context.Context, error) {
+	tkn, err := fetchBearerToken(req)
 	if err != nil {
-		return err
+		return nil, err
 	}
-	// This is an analog of context.WithValue.
-	ctx.SetUserValue(bearerTokenKey, tkn)
-	return nil
+	newCtx := context.WithValue(ctx, bearerTokenKey, tkn)
+	return newCtx, nil
 }
 
 // LoadBearerToken returns a bearer token stored in the context given (if it's

tokens/bearer-token_test.go

@@ -3,6 +3,7 @@
 package tokens
 
 import (
+	"context"
 	"encoding/base64"
 	"testing"
 
@@ -150,13 +151,14 @@ func Test_checkAndPropagateBearerToken(t *testing.T) {
 	t64 := base64.StdEncoding.EncodeToString(tkn.Marshal())
 	require.NotEmpty(t, t64)
 
-	ctx := makeTestRequest(t64, "")
+	req := makeTestRequest(t64, "")
 
 	// Expect to see the token within the context.
-	require.NoError(t, StoreBearerToken(ctx))
+	appCtx, err := StoreBearerTokenAppCtx(context.Background(), req)
+	require.NoError(t, err)
 
 	// Expect to see the same token without errors.
-	actual, err := LoadBearerToken(ctx)
+	actual, err := LoadBearerToken(appCtx)
 	require.NoError(t, err)
 	require.Equal(t, tkn, actual)
 }

tree/tree.go

@@ -0,0 +1,189 @@
+package tree
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/api"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/api/layer"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
+)
+
+type (
+	Tree struct {
+		service ServiceClient
+	}
+
+	// ServiceClient is a client to interact with tree service.
+	// Each method must return ErrNodeNotFound or ErrNodeAccessDenied if relevant.
+	ServiceClient interface {
+		GetNodes(ctx context.Context, p *GetNodesParams) ([]NodeResponse, error)
+	}
+
+	treeNode struct {
+		ObjID oid.ID
+		Meta  map[string]string
+	}
+
+	GetNodesParams struct {
+		CnrID      cid.ID
+		TreeID     string
+		Path       []string
+		Meta       []string
+		LatestOnly bool
+		AllAttrs   bool
+	}
+)
+
+var (
+	// ErrNodeNotFound is returned from ServiceClient in case of not found error.
+	ErrNodeNotFound = layer.ErrNodeNotFound
+
+	// ErrNodeAccessDenied is returned from ServiceClient service in case of access denied error.
+	ErrNodeAccessDenied = layer.ErrNodeAccessDenied
+)
+
+const (
+	FileNameKey = "FileName"
+)
+
+const (
+	oidKV = "OID"
+
+	// keys for delete marker nodes.
+	isDeleteMarkerKV = "IsDeleteMarker"
+
+	// versionTree -- ID of a tree with object versions.
+	versionTree = "version"
+
+	separator = "/"
+)
+
+// NewTree creates instance of Tree using provided address and create grpc connection.
+func NewTree(service ServiceClient) *Tree {
+	return &Tree{service: service}
+}
+
+type Meta interface {
+	GetKey() string
+	GetValue() []byte
+}
+
+type NodeResponse interface {
+	GetMeta() []Meta
+	GetTimestamp() uint64
+}
+
+func newTreeNode(nodeInfo NodeResponse) (*treeNode, error) {
+	treeNode := &treeNode{
+		Meta: make(map[string]string, len(nodeInfo.GetMeta())),
+	}
+
+	for _, kv := range nodeInfo.GetMeta() {
+		switch kv.GetKey() {
+		case oidKV:
+			if err := treeNode.ObjID.DecodeString(string(kv.GetValue())); err != nil {
+				return nil, err
+			}
+		default:
+			treeNode.Meta[kv.GetKey()] = string(kv.GetValue())
+		}
+	}
+
+	return treeNode, nil
+}
+
+func (n *treeNode) Get(key string) (string, bool) {
+	value, ok := n.Meta[key]
+	return value, ok
+}
+
+func (n *treeNode) FileName() (string, bool) {
+	value, ok := n.Meta[FileNameKey]
+	return value, ok
+}
+
+func newNodeVersion(node NodeResponse) (*api.NodeVersion, error) {
+	treeNode, err := newTreeNode(node)
+	if err != nil {
+		return nil, fmt.Errorf("invalid tree node: %w", err)
+	}
+
+	return newNodeVersionFromTreeNode(treeNode), nil
+}
+
+func newNodeVersionFromTreeNode(treeNode *treeNode) *api.NodeVersion {
+	_, isDeleteMarker := treeNode.Get(isDeleteMarkerKV)
+
+	version := &api.NodeVersion{
+		BaseNodeVersion: api.BaseNodeVersion{
+			OID: treeNode.ObjID,
+		},
+		DeleteMarker: isDeleteMarker,
+	}
+
+	return version
+}
+
+func (c *Tree) GetLatestVersion(ctx context.Context, cnrID *cid.ID, objectName string) (*api.NodeVersion, error) {
+	meta := []string{oidKV, isDeleteMarkerKV}
+	path := pathFromName(objectName)
+
+	p := &GetNodesParams{
+		CnrID:      *cnrID,
+		TreeID:     versionTree,
+		Path:       path,
+		Meta:       meta,
+		LatestOnly: false,
+		AllAttrs:   false,
+	}
+	nodes, err := c.service.GetNodes(ctx, p)
+	if err != nil {
+		return nil, err
+	}
+
+	latestNode, err := getLatestNode(nodes)
+	if err != nil {
+		return nil, err
+	}
+
+	return newNodeVersion(latestNode)
+}
+
+func getLatestNode(nodes []NodeResponse) (NodeResponse, error) {
+	var (
+		maxCreationTime uint64
+		targetIndexNode = -1
+	)
+
+	for i, node := range nodes {
+		currentCreationTime := node.GetTimestamp()
+		if checkExistOID(node.GetMeta()) && currentCreationTime > maxCreationTime {
+			maxCreationTime = currentCreationTime
+			targetIndexNode = i
+		}
+	}
+
+	if targetIndexNode == -1 {
+		return nil, layer.ErrNodeNotFound
+	}
+
+	return nodes[targetIndexNode], nil
+}
+
+func checkExistOID(meta []Meta) bool {
+	for _, kv := range meta {
+		if kv.GetKey() == "OID" {
+			return true
+		}
+	}
+
+	return false
+}
+
+// pathFromName splits name by '/'.
+func pathFromName(objectName string) []string {
+	return strings.Split(objectName, separator)
+}

tree/tree_test.go

@@ -0,0 +1,143 @@
+package tree
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+type nodeMeta struct {
+	key   string
+	value []byte
+}
+
+func (m nodeMeta) GetKey() string {
+	return m.key
+}
+
+func (m nodeMeta) GetValue() []byte {
+	return m.value
+}
+
+type nodeResponse struct {
+	meta      []nodeMeta
+	timestamp uint64
+}
+
+func (n nodeResponse) GetTimestamp() uint64 {
+	return n.timestamp
+}
+
+func (n nodeResponse) GetMeta() []Meta {
+	res := make([]Meta, len(n.meta))
+	for i, value := range n.meta {
+		res[i] = value
+	}
+	return res
+}
+
+func TestGetLatestNode(t *testing.T) {
+	for _, tc := range []struct {
+		name        string
+		nodes       []NodeResponse
+		exceptedOID string
+		error       bool
+	}{
+		{
+			name:  "empty",
+			nodes: []NodeResponse{},
+			error: true,
+		},
+		{
+			name: "one node of the object version",
+			nodes: []NodeResponse{
+				nodeResponse{
+					timestamp: 1,
+					meta: []nodeMeta{
+						{
+							key:   oidKV,
+							value: []byte("oid1"),
+						},
+					},
+				},
+			},
+			exceptedOID: "oid1",
+		},
+		{
+			name: "one node of the object version and one node of the secondary object",
+			nodes: []NodeResponse{
+				nodeResponse{
+					timestamp: 3,
+					meta:      []nodeMeta{},
+				},
+				nodeResponse{
+					timestamp: 1,
+					meta: []nodeMeta{
+						{
+							key:   oidKV,
+							value: []byte("oid1"),
+						},
+					},
+				},
+			},
+			exceptedOID: "oid1",
+		},
+		{
+			name: "all nodes represent a secondary object",
+			nodes: []NodeResponse{
+				nodeResponse{
+					timestamp: 3,
+					meta:      []nodeMeta{},
+				},
+				nodeResponse{
+					timestamp: 5,
+					meta:      []nodeMeta{},
+				},
+			},
+			error: true,
+		},
+		{
+			name: "several nodes of different types and with different timestamp",
+			nodes: []NodeResponse{
+				nodeResponse{
+					timestamp: 1,
+					meta: []nodeMeta{
+						{
+							key:   oidKV,
+							value: []byte("oid1"),
+						},
+					},
+				},
+				nodeResponse{
+					timestamp: 3,
+					meta:      []nodeMeta{},
+				},
+				nodeResponse{
+					timestamp: 4,
+					meta: []nodeMeta{
+						{
+							key:   oidKV,
+							value: []byte("oid2"),
+						},
+					},
+				},
+				nodeResponse{
+					timestamp: 6,
+					meta:      []nodeMeta{},
+				},
+			},
+			exceptedOID: "oid2",
+		},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			actualNode, err := getLatestNode(tc.nodes)
+			if tc.error {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+			require.Equal(t, tc.exceptedOID, string(actualNode.GetMeta()[0].GetValue()))
+		})
+	}
+}

utils/params.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/cache"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
@@ -12,4 +13,5 @@ type AppParams struct {
 	Pool     *pool.Pool
 	Owner    *user.ID
 	Resolver *resolver.ContainerResolver
+	Cache    *cache.BucketCache
 }

utils/tracing.go

@@ -0,0 +1,83 @@
+package utils
+
+import (
+	"context"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	"github.com/valyala/fasthttp"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/codes"
+	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+	"go.opentelemetry.io/otel/trace"
+)
+
+type httpCarrier struct {
+	r *fasthttp.RequestCtx
+}
+
+func (c *httpCarrier) Get(key string) string {
+	bytes := c.r.Request.Header.Peek(key)
+	if len(bytes) == 0 {
+		return ""
+	}
+	return string(bytes)
+}
+
+func (c *httpCarrier) Set(key string, value string) {
+	c.r.Response.Header.Set(key, value)
+}
+
+func (c *httpCarrier) Keys() []string {
+	dict := make(map[string]interface{})
+	c.r.Request.Header.VisitAll(
+		func(key, value []byte) {
+			dict[string(key)] = true
+		},
+	)
+	c.r.Response.Header.VisitAll(
+		func(key, value []byte) {
+			dict[string(key)] = true
+		},
+	)
+	result := make([]string, 0, len(dict))
+	for key := range dict {
+		result = append(result, key)
+	}
+	return result
+}
+
+func extractHTTPTraceInfo(ctx context.Context, req *fasthttp.RequestCtx) context.Context {
+	if req == nil {
+		return ctx
+	}
+	carrier := &httpCarrier{r: req}
+	return tracing.Propagator.Extract(ctx, carrier)
+}
+
+// SetHTTPTraceInfo saves trace headers to response.
+func SetHTTPTraceInfo(ctx context.Context, span trace.Span, req *fasthttp.RequestCtx) {
+	if req == nil {
+		return
+	}
+	if err := req.Err(); err != nil {
+		span.SetStatus(codes.Error, err.Error())
+	}
+	span.SetAttributes(
+		semconv.HTTPStatusCode(req.Response.StatusCode()),
+	)
+	carrier := &httpCarrier{r: req}
+	tracing.Propagator.Inject(ctx, carrier)
+}
+
+// StartHTTPServerSpan starts root HTTP server span.
+func StartHTTPServerSpan(ctx context.Context, req *fasthttp.RequestCtx, operationName string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
+	ctx = extractHTTPTraceInfo(ctx, req)
+	opts = append(opts, trace.WithAttributes(
+		attribute.String("http.client_address", req.RemoteAddr().String()),
+		attribute.String("http.path", string(req.Path())),
+		semconv.HTTPMethod(string(req.Method())),
+		semconv.RPCService("frostfs-http-gw"),
+		attribute.String("http.query", req.QueryArgs().String()),
+	), trace.WithSpanKind(trace.SpanKindServer))
+	return tracing.StartSpanFromContext(ctx, operationName, opts...)
+}

utils/util.go

@@ -4,22 +4,10 @@ import (
 	"context"
 	"fmt"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
-	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
+	"github.com/valyala/fasthttp"
 )
 
-// GetContainerID decode container id, if it's not a valid container id
-// then trey to resolve name using provided resolver.
-func GetContainerID(ctx context.Context, containerID string, resolver *resolver.ContainerResolver) (*cid.ID, error) {
-	cnrID := new(cid.ID)
-	err := cnrID.DecodeString(containerID)
-	if err != nil {
-		cnrID, err = resolver.Resolve(ctx, containerID)
-	}
-	return cnrID, err
-}
-
 type EpochDurations struct {
 	CurrentEpoch  uint64
 	MsPerBlock    int64
@@ -43,3 +31,13 @@ func GetEpochDurations(ctx context.Context, p *pool.Pool) (*EpochDurations, erro
 	}
 	return res, nil
 }
+
+// SetContextToRequest adds new context to fasthttp request.
+func SetContextToRequest(ctx context.Context, c *fasthttp.RequestCtx) {
+	c.SetUserValue("context", ctx)
+}
+
+// GetContextFromRequest returns main context from fasthttp request context.
+func GetContextFromRequest(c *fasthttp.RequestCtx) context.Context {
+	return c.UserValue("context").(context.Context)
+}