532 lines
20 KiB
Markdown
532 lines
20 KiB
Markdown
<p align="center">
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<img src="./.github/logo.svg" width="500px" alt="NeoFS">
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</p>
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<p align="center">
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<a href="https://fs.neo.org">NeoFS</a> is a decentralized distributed object storage integrated with the <a href="https://neo.org">NEO Blockchain</a>.
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</p>
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---
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[](https://goreportcard.com/report/github.com/nspcc-dev/neofs-http-gw)
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# NeoFS HTTP Gateway
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NeoFS HTTP Gateway bridges NeoFS internal protocol and HTTP standard.
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- you can download one file per request from NeoFS Network
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- you can upload one file per request into the NeoFS Network
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## Installation
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```go install github.com/nspcc-dev/neofs-http-gw```
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Or you can call `make` to build it from the cloned repository (the binary will
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end up in `bin/neofs-http-gw`).
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Notable make targets:
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```
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dep Check and ensure dependencies
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image Build clean docker image
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dirty-image Build dirty docker image with host-built binaries
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fmts Run all code formatters
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lint Run linters
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version Show current version
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```
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Or you can also use a [Docker
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image](https://hub.docker.com/r/nspccdev/neofs-http-gw) provided for released
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(and occasionally unreleased) versions of gateway (`:latest` points to the
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latest stable release).
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## Execution
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HTTP gateway itself is not a NeoFS node, so to access NeoFS it uses node's
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gRPC interface and you need to provide some node that it will connect to. This
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can be done either via `-p` parameter or via `HTTP_GW_PEERS_<N>_ADDRESS` and
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`HTTP_GW_PEERS_<N>_WEIGHT` environment variables (the gate supports multiple
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NeoFS nodes with weighted load balancing).
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If you're launching HTTP gateway in bundle with [neofs-dev-env](https://github.com/nspcc-dev/neofs-dev-env),
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you can get an IP address of the node in output of `make hosts` command
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(with s0*.neofs.devenv name).
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These two commands are functionally equivalent, they run the gate with one
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backend node (and otherwise default settings):
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```
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$ neofs-http-gw -p 192.168.130.72:8080
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$ HTTP_GW_PEERS_0_ADDRESS=192.168.130.72:8080 neofs-http-gw
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```
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It's also possible to specify uri scheme (grpc or grpcs) when using `-p`:
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```
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$ neofs-http-gw -p grpc://192.168.130.72:8080
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$ HTTP_GW_PEERS_0_ADDRESS=grpcs://192.168.130.72:8080 neofs-http-gw
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```
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## Configuration
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In general, everything available as CLI parameter can also be specified via
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environment variables (see [example](./config/config.env)), so they're not specifically mentioned in most cases
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(see `--help` also). If you prefer a config file you can use it in yaml format.
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### Nodes: weights and priorities
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You can specify multiple `-p` options to add more NeoFS nodes, this will make
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gateway spread requests equally among them (using weight 1 and priority 1 for every node):
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```
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$ neofs-http-gw -p 192.168.130.72:8080 -p 192.168.130.71:8080
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```
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If you want some specific load distribution proportions, use weights and priorities:
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```
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$ HTTP_GW_PEERS_0_ADDRESS=192.168.130.71:8080 HTTP_GW_PEERS_0_WEIGHT=1 HTTP_GW_PEERS_0_PRIORITY=1 \
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HTTP_GW_PEERS_1_ADDRESS=192.168.130.72:8080 HTTP_GW_PEERS_1_WEIGHT=9 HTTP_GW_PEERS_1_PRIORITY=2 \
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HTTP_GW_PEERS_2_ADDRESS=192.168.130.73:8080 HTTP_GW_PEERS_2_WEIGHT=1 HTTP_GW_PEERS_2_PRIORITY=2 \
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neofs-http-gw
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```
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This command will make gateway use 192.168.130.71 while it is healthy. Otherwise, it will make the gateway use
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192.168.130.72 for 90% of requests and 192.168.130.73 for remaining 10%.
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### Keys
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You can provide wallet via `--wallet` or `-w` flag also you can specify account address using `--address`
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(if no address provided default one will be used). If wallet is used you need to set `HTTP_GW_WALLET_PASSPHRASE` variable to decrypt wallet.
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If no wallet provided gateway autogenerates key pair it will use for NeoFS requests.
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```
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$ neofs-http-gw -p $NEOFS_NODE -w $WALLET_PATH --address $ACCOUNT_ADDRESS
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```
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Example:
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```
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$ neofs-http-gw -p 192.168.130.72:8080 -w wallet.json --address NfgHwwTi3wHAS8aFAN243C5vGbkYDpqLHP
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```
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### Binding and TLS
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Gateway binds to `0.0.0.0:8082` by default and you can change that with
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`--listen_address` option.
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It can also provide TLS interface for its users, just specify paths to key and
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certificate files via `--tls_key` and `--tls_certificate` parameters. Note
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that using these options makes gateway TLS-only, if you need to serve both TLS
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and plain text HTTP you either have to run two gateway instances or use some
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external redirecting solution.
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Example to bind to `192.168.130.130:443` and serve TLS there:
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```
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$ neofs-http-gw -p 192.168.130.72:8080 --listen_address 192.168.130.130:443 \
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--tls_key=key.pem --tls_certificate=cert.pem
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```
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### HTTP parameters
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You can tune HTTP read and write buffer sizes as well as timeouts with
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`HTTP_GW_WEB_READ_BUFFER_SIZE`, `HTTP_GW_WEB_READ_TIMEOUT`,
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`HTTP_GW_WEB_WRITE_BUFFER_SIZE` and `HTTP_GW_WEB_WRITE_TIMEOUT` environment
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variables.
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`HTTP_GW_WEB_STREAM_REQUEST_BODY` environment variable can be used to disable
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request body streaming (effectively it'll make gateway accept file completely
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first and only then try sending it to NeoFS).
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`HTTP_GW_WEB_MAX_REQUEST_BODY_SIZE` controls maximum request body size
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limiting uploads to files slightly lower than this limit.
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### NeoFS parameters
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Gateway can automatically set timestamps for uploaded files based on local
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time source, use `HTTP_GW_UPLOAD_HEADER_USE_DEFAULT_TIMESTAMP` environment
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variable to control this behavior.
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### Monitoring and metrics
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Pprof and Prometheus are integrated into the gateway, but not enabled by
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default. To enable them use `--pprof` and `--metrics` flags or
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`HTTP_GW_PPROF`/`HTTP_GW_METRICS` environment variables.
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### Timeouts
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You can tune gRPC interface parameters with `--connect_timeout` (for
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connection to node) and `--request_timeout` (for request processing over
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established connection) options.
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gRPC-level checks allow gateway to detect dead peers, but it declares them
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unhealthy at pool level once per `--rebalance_timer` interval, so check for it
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if needed.
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All timing options accept values with suffixes, so "15s" is 15 seconds and
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"2m" is 2 minutes.
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### Zip streaming
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The gateway supports downloading files by common prefix (like dir) in zip format. You can enable compression
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using config or `HTTP_GW_ZIP_COMPRESSION=true` environment variable.
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### Logging
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You can specify logging level (default `info`) using variable:
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```
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HTTP_GW_LOGGER_LEVEL=debug
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```
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### Yaml file
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Configuration file is optional and can be used instead of environment variables/other parameters.
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It can be specified with `--config` parameter:
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```
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$ neofs-http-gw --config your-config.yaml
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```
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See [config](./config/config.yaml) for example.
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## HTTP API provided
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This gateway intentionally provides limited feature set and doesn't try to
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substitute (or completely wrap) regular gRPC NeoFS interface. You can download
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and upload objects with it, but deleting, searching, managing ACLs, creating
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containers and other activities are not supported and not planned to be
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supported.
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### Preparation
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Before uploading or downloading a file make sure you have a prepared container.
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You can create it with instructions below.
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Also in case of downloading you need to have a file inside a container.
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#### Create a container
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You can create a container via [neofs-cli](https://github.com/nspcc-dev/neofs-node/releases):
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```
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$ neofs-cli -r $NEOFS_NODE -k $KEY container create --policy $POLICY --basic-acl $ACL
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```
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where `$KEY` can be a path to private key file (as raw bytes), a hex string or
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(unencrypted) WIF string,
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`$ACL` -- hex encoded basic ACL value or keywords 'private, 'public-read', 'public-read-write' and
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`$POLICY` -- QL-encoded or JSON-encoded placement policy or path to file with it
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For example:
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```
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$ neofs-cli -r 192.168.130.72:8080 -k 6PYLKJhiSub5imt6WCVy6Quxtd9xu176omev1vWYovzkAQCTSQabAAQXii container create --policy "REP 3" --basic-acl public --await
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```
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If you launched nodes via [neofs-dev-env](https://github.com/nspcc-dev/neofs-dev-env)
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you can get the key value from `wallets/wallet.json` or write the path to
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the file `wallets/wallet.key`.
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#### Prepare a file in a container
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To create a file via [neofs-cli](https://github.com/nspcc-dev/neofs-node/releases), run a command below:
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```
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$ neofs-cli -r $NEOFS_NODE -k $KEY object put --file $FILENAME --cid $CID
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```
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where
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`$KEY` -- the key, please read the information [above](#create-a-container),
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`$CID` -- container ID.
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For example:
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```
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$ neofs-cli -r 192.168.130.72:8080 -k 6PYLKJhiSub5imt6WCVy6Quxtd9xu176omev1vWYovzkAQCTSQabAAQXii object put --file cat.png --cid DPL2tpRiuDNmoTj5KZjD1nzDuCS8tVcxa7hsvSLDWpVM --attributes img_type=cat,my_attr=cute
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```
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### Downloading
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#### Requests
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The following requests support GET/HEAD methods.
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##### By IDs
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Basic downloading involves container ID and object ID and is done via GET
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requests to `/get/$CID/$OID` path, where `$CID` is a container ID,
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`$OID` is an object's (i.e. your file's) ID.
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For example:
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```
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$ wget http://localhost:8082/get/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ/2m8PtaoricLouCn5zE8hAFr3gZEBDCZFe9BEgVJTSocY
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```
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##### By attributes
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There is also more complex interface provided for attribute-based downloads,
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it's usually used to retrieve files by their names, but any other attribute
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can be used as well. The generic syntax for it looks like this:
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```/get_by_attribute/$CID/$ATTRIBUTE_NAME/$ATTRIBUTE_VALUE```
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where
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`$CID` is a container ID,
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`$ATTRIBUTE_NAME` is the name of the attribute we want to use,
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`$ATTRIBUTE_VALUE` is the value of this attribute that the target object should have.
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**NB!** The attribute key and value must be url encoded, i.e., if you want to download an object with the attribute value
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`a cat`, the value in the request must be `a+cat`. In the same way with the attribute key.
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If multiple objects have specified attribute with specified value, then the
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first one of them is returned (and you can't get others via this interface).
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Example for file name attribute:
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```
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$ wget http://localhost:8082/get_by_attribute/88GdaZFTcYJn1dqiSECss8kKPmmun6d6BfvC4zhwfLYM/FileName/cat.jpeg
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```
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Or when the filename includes special symbols:
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```
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$ wget http://localhost:8082/get_by_attribute/88GdaZFTcYJn1dqiSECss8kKPmmun6d6BfvC4zhwfLYM/FileName/cat+jpeg # means 'cat jpeg'
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$ wget http://localhost:8082/get_by_attribute/88GdaZFTcYJn1dqiSECss8kKPmmun6d6BfvC4zhwfLYM/FileName/cat%25jpeg # means 'cat%jpeg'
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```
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Some other user-defined attribute:
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```
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$ wget http://localhost:8082/get_by_attribute/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ/Ololo/100500
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```
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Or when the attribute includes special symbols:
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```
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$ wget http://localhost:8082/get_by_attribute/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ/Olo%2Blo/100500 # means Olo+lo
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```
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An optional `download=true` argument for `Content-Disposition` management is
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also supported (more on that below):
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```
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$ wget http://localhost:8082/get/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ/2m8PtaoricLouCn5zE8hAFr3gZEBDCZFe9BEgVJTSocY?download=true
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```
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##### Zip
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You can download some dir (files with the same prefix) in zip (it will be compressed if config contains appropriate param):
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```
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$ wget http://localhost:8082/zip/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ/common/prefix
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```
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**Note:** the objects must have a `FilePath` attribute, otherwise they will not be in the zip archive.
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You can upload file with this attribute using `curl`:
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```
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$ curl -F 'file=@cat.jpeg;filename=cat.jpeg' -H 'X-Attribute-FilePath: common/prefix/cat.jpeg' http://localhost:8082/upload/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ
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```
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#### Replies
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You get object contents in the reply body (if GET method was used), but at the same time you also get a
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set of reply headers generated using the following rules:
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* `Content-Length` is set to the length of the object
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* `Content-Type` is autodetected dynamically by gateway
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* `Content-Disposition` is `inline` for regular requests and `attachment` for
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requests with `download=true` argument, `filename` is also added if there
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is `FileName` attribute set for this object
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* `Last-Modified` header is set to `Timestamp` attribute value if it's
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present for the object
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* `x-container-id` contains container ID
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* `x-object-id` contains object ID
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* `x-owner-id` contains owner address
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* all the other NeoFS attributes are converted to `X-Attribute-*` headers (but only
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if they can be safely represented in HTTP header), for example `FileName`
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attribute becomes `X-Attribute-FileName` header
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### Uploading
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You can POST files to `/upload/$CID` path where `$CID` is container ID. The
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request must contain multipart form with mandatory `filename` parameter. Only
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one part in multipart form will be processed, so to upload another file just
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issue new POST request.
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Example request:
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```
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$ curl -F 'file=@cat.jpeg;filename=cat.jpeg' http://localhost:8082/upload/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ
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```
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Chunked encoding is supported by the server (but check for request read
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timeouts if you're planning some streaming). You can try streaming support
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with large file piped through named FIFO pipe:
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```
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$ mkfifo pipe
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$ cat video.mp4 > pipe &
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$ curl --no-buffer -F 'file=@pipe;filename=catvideo.mp4' http://localhost:8082/upload/Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ
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```
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You can also add some attributes to your file using the following rules:
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* all "X-Attribute-*" headers get converted to object attributes with
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"X-Attribute-" prefix stripped, that is if you add "X-Attribute-Ololo:
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100500" header to your request the resulting object will get "Ololo:
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100500" attribute
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* "X-Attribute-NEOFS-*" headers are special
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(`-NEOFS-` part can also be `-neofs-` or`-Neofs-`), they're used to set internal
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NeoFS attributes starting with `__NEOFS__` prefix, for these attributes all
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dashes get converted to underscores and all letters are capitalized. For
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example, you can use "X-Attribute-NEOFS-Expiration-Epoch" header to set
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`__NEOFS__EXPIRATION_EPOCH` attribute
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* `FileName` attribute is set from multipart's `filename` if not set
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explicitly via `X-Attribute-FileName` header
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* `Timestamp` attribute can be set using gateway local time if using
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HTTP_GW_UPLOAD_HEADER_USE_DEFAULT_TIMESTAMP option and if request doesn't
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provide `X-Attribute-Timestamp` header of its own
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---
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**NOTE**
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There are some reserved headers type of `X-Attribute-NEOFS-*` (headers are arranged in descending order of priority):
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1. `X-Attribute-Neofs-Expiration-Epoch: 100`
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2. `X-Attribute-Neofs-Expiration-Duration: 24h30m`
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3. `X-Attribute-Neofs-Expiration-Timestamp: 1637574797`
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4. `X-Attribute-Neofs-Expiration-RFC3339: 2021-11-22T09:55:49Z`
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which transforms to `X-Attribute-Neofs-Expiration-Epoch`. So you can provide expiration any convenient way.
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---
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For successful uploads you get JSON data in reply body with container and
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object ID, like this:
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```
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{
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"object_id": "9ANhbry2ryjJY1NZbcjryJMRXG5uGNKd73kD3V1sVFsX",
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"container_id": "Dxhf4PNprrJHWWTG5RGLdfLkJiSQ3AQqit1MSnEPRkDZ"
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}
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```
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#### Authentication
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You can always upload files to public containers (open for anyone to put
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objects into), but for restricted containers you need to explicitly allow PUT
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operations for request signed with your HTTP Gateway keys.
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If your don't want to manage gateway's secret keys and adjust eACL rules when
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gateway configuration changes (new gate, key rotation, etc) or you plan to use
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public services, there is an option to let your application backend (or you) to
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issue Bearer Tokens ans pass them from the client via gate down to NeoFS level
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to grant access.
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NeoFS Bearer Token basically is a container owner-signed ACL data (refer to NeoFS
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documentation for more details). There are two options to pass them to gateway:
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* "Authorization" header with "Bearer" type and base64-encoded token in
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credentials field
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* "Bearer" cookie with base64-encoded token contents
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For example you have a mobile application frontend with a backend part storing
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data in NeoFS. When user authorizes in mobile app, the backend issues a NeoFS
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Bearer token and provides it to the frontend. Then the mobile app may generate
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some data and upload it via any available NeoFS HTTP Gateway by adding
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the corresponding header to the upload request. Accessing the ACL protected data
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works the same way.
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##### Example
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In order to generate bearer token, you need to know container owner key and
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address of sender who will be do request to NeoFS (in our case it's gateway wallet address).
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Suppose we have:
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* **KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr** (container owner key)
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* **NhVtreTTCoqsMQV5Wp55fqnriiUCpEaKm3** (token owner address)
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* **BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K** (container id)
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Firstly we need to encode container id and sender address to base64 (now it's base58).
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So use **base58** and **base64** utils.
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1. Encoding container id:
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```
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$ echo 'BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K' | base58 --decode | base64
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# output: mRnZWzewzxjzIPa7Fqlfqdl3TM1KpJ0YnsXsEhafJJg=
|
|
```
|
|
|
|
2. Encoding token owner id:
|
|
```
|
|
$ echo 'NhVtreTTCoqsMQV5Wp55fqnriiUCpEaKm3' | base58 --decode | base64
|
|
# output: NezFK4ujidF+X7bB88uzREQzRQeAvdj3Gg==
|
|
```
|
|
|
|
Now we can form Bearer token (10000 is liftetime expiration in epoch) and save it to **bearer.json**:
|
|
```
|
|
{
|
|
"body": {
|
|
"eaclTable": {
|
|
"version": {
|
|
"major": 0,
|
|
"minor": 0
|
|
},
|
|
"containerID": {
|
|
"value": "mRnZWzewzxjzIPa7Fqlfqdl3TM1KpJ0YnsXsEhafJJg="
|
|
},
|
|
"records": []
|
|
},
|
|
"ownerID": {
|
|
"value": "NezFK4ujidF+X7bB88uzREQzRQeAvdj3Gg=="
|
|
},
|
|
"lifetime": {
|
|
"exp": "10000",
|
|
"nbf": "0",
|
|
"iat": "0"
|
|
}
|
|
},
|
|
"signature": null
|
|
}
|
|
```
|
|
|
|
Then sign it with container owner key:
|
|
```
|
|
$ neofs-cli util sign bearer-token --from bearer.json --to signed.json -k KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr
|
|
```
|
|
Encoding to base64 to use via header:
|
|
```
|
|
$ base64 -w 0 signed.json
|
|
# output: Ck4KKgoECAIQBhIiCiCZGdlbN7DPGPMg9rsWqV+p2XdMzUqknRiexewSFp8kmBIbChk17MUri6OJ0X5ftsHzy7NERDNFB4C92PcaGgMIkE4SZgohAxpsb7vfAso1F0X6hrm6WpRS14WsT3/Ct1SMoqRsT89KEkEEGxKi8GjKSf52YqhppgaOTQHbUsL3jn7SHLqS3ndAQ7NtAATnmRHleZw2V2xRRSRBQdjDC05KK83LhdSax72Fsw==
|
|
```
|
|
|
|
After that Bearer token can be used:
|
|
|
|
```
|
|
$ curl -F 'file=@cat.jpeg;filename=cat.jpeg' -H "Authorization: Bearer Ck4KKgoECAIQBhIiCiCZGdlbN7DPGPMg9rsWqV+p2XdMzUqknRiexewSFp8kmBIbChk17MUri6OJ0X5ftsHzy7NERDNFB4C92PcaGgMIkE4SZgohAxpsb7vfAso1F0X6hrm6WpRS14WsT3/Ct1SMoqRsT89KEkEEGxKi8GjKSf52YqhppgaOTQHbUsL3jn7SHLqS3ndAQ7NtAATnmRHleZw2V2xRRSRBQdjDC05KK83LhdSax72Fsw==" \
|
|
http://localhost:8082/upload/BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K
|
|
# output:
|
|
# {
|
|
# "object_id": "DhfES9nVrFksxGDD2jQLunGADfrXExxNwqXbDafyBn9X",
|
|
# "container_id": "BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K"
|
|
# }
|
|
```
|
|
|
|
##### Note
|
|
For the token to work correctly, you need to create a container with a basic ACL that:
|
|
1. Allow PUT operation to others
|
|
2. Doesn't set "final" bit
|
|
|
|
For example:
|
|
```
|
|
$ neofs-cli --key KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr --basic-acl 0x0FFFCFFF -r 192.168.130.72:8080 container create --policy "REP 3" --await
|
|
```
|
|
|
|
To deny access to the container without a token, set the eACL rules:
|
|
```
|
|
$ neofs-cli --key KxDgvEKzgSBPPfuVfw67oPQBSjidEiqTHURKSDL1R7yGaGYAeYnr -r 192.168.130.72:8080 container set-eacl --table eacl.json --await --cid BJeErH9MWmf52VsR1mLWKkgF3pRm3FkubYxM7TZkBP4K
|
|
```
|
|
|
|
File **eacl.json**:
|
|
```
|
|
{
|
|
"version": {
|
|
"major": 0,
|
|
"minor": 0
|
|
},
|
|
"containerID": {
|
|
"value": "mRnZWzewzxjzIPa7Fqlfqdl3TM1KpJ0YnsXsEhafJJg="
|
|
},
|
|
"records": [
|
|
{
|
|
"operation": "PUT",
|
|
"action": "DENY",
|
|
"filters": [],
|
|
"targets": [
|
|
{
|
|
"role": "OTHERS",
|
|
"keys": []
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
```
|
|
|
|
### Metrics and Pprof
|
|
|
|
If enabled, Prometheus metrics are available at `/metrics/` path and Pprof at
|
|
`/debug/pprof`.
|