[#73] Uploader, downloader structures refactoring

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

Makefile

@@ -18,8 +18,8 @@ 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
 
@@ -37,7 +37,7 @@ $(BINS):  $(DIRS) dep
 	CGO_ENABLED=0 \
 	go build -v -trimpath \
 	-ldflags "-X main.Version=$(VERSION)" \
-	-o $@ ./
+	-o $@ ./cmd/$(subst frostfs-,,$(notdir $@))
 
 $(DIRS):
 	@echo "⇒ Ensure dir: $@"
@@ -90,7 +90,7 @@ image:
 		--build-arg REPO=$(REPO) \
 		--build-arg VERSION=$(VERSION) \
 		--rm \
-		-f Dockerfile \
+		-f .docker/Dockerfile \
 		-t $(HUB_IMAGE):$(HUB_TAG) .
 
 # Push Docker image to the hub
@@ -105,7 +105,7 @@ 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

cmd/http-gw/app.go

@@ -11,15 +11,14 @@ import (
 	"syscall"
 	"time"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/downloader"
 	"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/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/uploader"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
@@ -51,15 +50,10 @@ type (
 		resolver  *resolver.ContainerResolver
 		metrics   *gateMetrics
 		services  []*metrics.Service
-		settings  *appSettings
+		settings  *handler.Settings
 		servers   []Server
 	}
 
-	appSettings struct {
-		Uploader   *uploader.Settings
-		Downloader *downloader.Settings
-	}
-
 	// App is an interface for the main gateway function.
 	App interface {
 		Wait()
@@ -140,10 +134,7 @@ func newApp(ctx context.Context, opt ...Option) App {
 }
 
 func (a *app) initAppSettings() {
-	a.settings = &appSettings{
-		Uploader:   &uploader.Settings{},
-		Downloader: &downloader.Settings{},
-	}
+	a.settings = &handler.Settings{}
 
 	a.updateSettings()
 }
@@ -334,11 +325,10 @@ func (a *app) setHealthStatus() {
 }
 
 func (a *app) Serve() {
-	uploadRoutes := uploader.New(a.AppParams(), a.settings.Uploader)
-	downloadRoutes := downloader.New(a.AppParams(), a.settings.Downloader, tree.NewTree(services.NewPoolWrapper(a.treePool)))
+	handler := handler.New(a.AppParams(), a.settings, tree.NewTree(services.NewPoolWrapper(a.treePool)))
 
 	// Configure router.
-	a.configureRouter(uploadRoutes, downloadRoutes)
+	a.configureRouter(handler)
 
 	a.startServices()
 	a.initServers(a.ctx)
@@ -425,8 +415,8 @@ func (a *app) configReload(ctx context.Context) {
 }
 
 func (a *app) updateSettings() {
-	a.settings.Uploader.SetDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
-	a.settings.Downloader.SetZipCompression(a.cfg.GetBool(cfgZipCompression))
+	a.settings.SetDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
+	a.settings.SetZipCompression(a.cfg.GetBool(cfgZipCompression))
 }
 
 func (a *app) startServices() {
@@ -450,7 +440,7 @@ func (a *app) stopServices() {
 	}
 }
 
-func (a *app) configureRouter(uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) {
+func (a *app) configureRouter(handler *handler.Handler) {
 	r := router.New()
 	r.RedirectTrailingSlash = true
 	r.NotFound = func(r *fasthttp.RequestCtx) {
@@ -459,15 +449,16 @@ func (a *app) configureRouter(uploadRoutes *uploader.Uploader, downloadRoutes *d
 	r.MethodNotAllowed = func(r *fasthttp.RequestCtx) {
 		response.Error(r, "Method Not Allowed", fasthttp.StatusMethodNotAllowed)
 	}
-	r.POST("/upload/{cid}", a.logger(a.tokenizer(a.tracer(uploadRoutes.Upload))))
+
+	r.POST("/upload/{cid}", a.logger(a.tokenizer(a.tracer(handler.Upload))))
 	a.log.Info(logs.AddedPathUploadCid)
-	r.GET("/get/{cid}/{oid:*}", a.logger(a.tokenizer(a.tracer(downloadRoutes.DownloadByAddressOrBucketName))))
-	r.HEAD("/get/{cid}/{oid:*}", a.logger(a.tokenizer(a.tracer(downloadRoutes.HeadByAddressOrBucketName))))
+	r.GET("/get/{cid}/{oid:*}", a.logger(a.tokenizer(a.tracer(handler.DownloadByAddressOrBucketName))))
+	r.HEAD("/get/{cid}/{oid:*}", a.logger(a.tokenizer(a.tracer(handler.HeadByAddressOrBucketName))))
 	a.log.Info(logs.AddedPathGetCidOid)
-	r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(a.tokenizer(a.tracer(downloadRoutes.DownloadByAttribute))))
-	r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(a.tokenizer(a.tracer(downloadRoutes.HeadByAttribute))))
+	r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(a.tokenizer(a.tracer(handler.DownloadByAttribute))))
+	r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(a.tokenizer(a.tracer(handler.HeadByAttribute))))
 	a.log.Info(logs.AddedPathGetByAttributeCidAttrKeyAttrVal)
-	r.GET("/zip/{cid}/{prefix:*}", a.logger(a.tokenizer(a.tracer(downloadRoutes.DownloadZipped))))
+	r.GET("/zip/{cid}/{prefix:*}", a.logger(a.tokenizer(a.tracer(handler.DownloadZipped))))
 	a.log.Info(logs.AddedPathZipCidPrefix)
 
 	a.webServer.Handler = r.Handler

cmd/http-gw/integration_test.go

@@ -83,7 +83,7 @@ func runServer() (App, context.CancelFunc) {
 	v := getDefaultConfig()
 	l, lvl := newLogger(v)
 	application := newApp(cancelCtx, WithConfig(v), WithLogger(l, lvl))
-	go application.Serve(cancelCtx)
+	go application.Serve()
 
 	return application, cancel
 }

downloader/download.go

@@ -1,537 +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/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/tokens"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
-	"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
-	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 receiveFile(ctx context.Context, req request, clnt *pool.Pool, 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 := clnt.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))
-}
-
-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(logs.CouldNotReceiveObject, logFields...)
-	response.Error(r.RequestCtx, msg, statusCode)
-}
-
-// Downloader is a download request handler.
-type Downloader struct {
-	log               *zap.Logger
-	pool              *pool.Pool
-	containerResolver *resolver.ContainerResolver
-	settings          *Settings
-	tree              *tree.Tree
-}
-
-// 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(params *utils.AppParams, settings *Settings, tree *tree.Tree) *Downloader {
-	return &Downloader{
-		log:               params.Logger,
-		pool:              params.Pool,
-		settings:          settings,
-		containerResolver: params.Resolver,
-		tree:              tree,
-	}
-}
-
-func (d *Downloader) newRequest(ctx *fasthttp.RequestCtx, log *zap.Logger) *request {
-	return &request{
-		RequestCtx: ctx,
-		log:        log,
-	}
-}
-
-// DownloadByAddressOrBucketName handles download requests using simple cid/oid or bucketname/key format.
-func (d *Downloader) DownloadByAddressOrBucketName(c *fasthttp.RequestCtx) {
-	test, _ := c.UserValue("oid").(string)
-	var id oid.ID
-	err := id.DecodeString(test)
-	if err != nil {
-		d.byBucketname(c, receiveFile)
-	} else {
-		d.byAddress(c, 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(context.Context, 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))
-	)
-
-	ctx := utils.GetContextFromRequest(c)
-
-	cnrID, err := utils.GetContainerID(ctx, idCnr, d.containerResolver)
-	if err != nil {
-		log.Error(logs.WrongContainerID, 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(logs.WrongObjectID, zap.Error(err))
-		response.Error(c, "wrong object id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	var addr oid.Address
-	addr.SetContainer(*cnrID)
-	addr.SetObject(*objID)
-
-	f(ctx, *d.newRequest(c, log), d.pool, addr)
-}
-
-// byBucketname is a wrapper for function (e.g. request.headObject, request.receiveFile) that
-// prepares request and object address to it.
-func (d *Downloader) byBucketname(req *fasthttp.RequestCtx, f func(context.Context, request, *pool.Pool, oid.Address)) {
-	var (
-		bucketname = req.UserValue("cid").(string)
-		key        = req.UserValue("oid").(string)
-		log        = d.log.With(zap.String("bucketname", bucketname), zap.String("key", key))
-	)
-
-	ctx := utils.GetContextFromRequest(req)
-
-	cnrID, err := utils.GetContainerID(ctx, bucketname, d.containerResolver)
-	if err != nil {
-		log.Error(logs.WrongContainerID, zap.Error(err))
-		response.Error(req, "wrong container id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	foundOid, err := d.tree.GetLatestVersion(ctx, cnrID, key)
-	if err != nil {
-		log.Error(logs.ObjectWasntFound, 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(*cnrID)
-	addr.SetObject(foundOid.OID)
-
-	f(ctx, *d.newRequest(req, log), d.pool, addr)
-}
-
-// DownloadByAttribute handles attribute-based download requests.
-func (d *Downloader) DownloadByAttribute(c *fasthttp.RequestCtx) {
-	d.byAttribute(c, receiveFile)
-}
-
-// byAttribute is a wrapper similar to byAddress.
-func (d *Downloader) byAttribute(c *fasthttp.RequestCtx, f func(context.Context, 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))
-	)
-
-	ctx := utils.GetContextFromRequest(c)
-
-	containerID, err := utils.GetContainerID(ctx, scid, d.containerResolver)
-	if err != nil {
-		log.Error(logs.WrongContainerID, zap.Error(err))
-		response.Error(c, "wrong container id", fasthttp.StatusBadRequest)
-		return
-	}
-
-	res, err := d.search(ctx, containerID, 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(*containerID)
-	addrObj.SetObject(buf[0])
-
-	f(ctx, *d.newRequest(c, log), d.pool, addrObj)
-}
-
-func (d *Downloader) 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 d.pool.SearchObjects(ctx, prm)
-}
-
-func (d *Downloader) getContainer(ctx context.Context, cnrID cid.ID) (container.Container, error) {
-	var prm pool.PrmContainerGet
-	prm.SetContainerID(cnrID)
-
-	return d.pool.GetContainer(ctx, 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))
-
-	ctx := utils.GetContextFromRequest(c)
-
-	containerID, err := utils.GetContainerID(ctx, scid, d.containerResolver)
-	if err != nil {
-		log.Error(logs.WrongContainerID, zap.Error(err))
-		response.Error(c, "wrong container id", 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(ctx, *containerID); err != nil {
-		log.Error(logs.CouldNotCheckContainerExistence, 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(ctx, containerID, 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(*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(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 (d *Downloader) 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 := d.pool.GetObject(ctx, 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

@@ -17,7 +17,6 @@ require (
 	github.com/valyala/fasthttp v1.34.0
 	go.opentelemetry.io/otel v1.16.0
 	go.opentelemetry.io/otel/trace v1.16.0
-	go.uber.org/atomic v1.10.0
 	go.uber.org/zap v1.24.0
 	google.golang.org/grpc v1.55.0
 )
@@ -97,6 +96,7 @@ require (
 	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/atomic v1.10.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/crypto v0.9.0 // indirect
 	golang.org/x/exp v0.0.0-20230515195305-f3d0a9c9a5cc // indirect

internal/api/layer/tree_service.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"errors"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/api"
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/api"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 )
 

internal/handler/download.go

@@ -0,0 +1,210 @@
+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"
+	"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/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.byBucketname(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) getContainer(ctx context.Context, cnrID cid.ID) (container.Container, error) {
+	var prm pool.PrmContainerGet
+	prm.SetContainerID(cnrID)
+
+	return h.pool.GetContainer(ctx, prm)
+}
+
+func (h *Handler) addObjectToZip(zw *zip.Writer, obj *object.Object) (io.Writer, error) {
+	method := zip.Store
+	if h.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 (h *Handler) DownloadZipped(c *fasthttp.RequestCtx) {
+	scid, _ := c.UserValue("cid").(string)
+	prefix, _ := url.QueryUnescape(c.UserValue("prefix").(string))
+	log := h.log.With(zap.String("cid", scid), zap.String("prefix", prefix))
+
+	ctx := utils.GetContextFromRequest(c)
+
+	containerID, err := h.getContainerID(ctx, scid)
+	if err != nil {
+		log.Error(logs.WrongContainerID, zap.Error(err))
+		response.Error(c, "wrong container id", 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 = h.getContainer(ctx, *containerID); err != nil {
+		log.Error(logs.CouldNotCheckContainerExistence, 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 := h.search(ctx, containerID, 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(*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 = 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

@@ -1,4 +1,4 @@
-package uploader
+package handler
 
 import (
 	"bytes"

internal/handler/filter_test.go

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

internal/handler/handler.go

@@ -0,0 +1,193 @@
+package handler
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net/url"
+	"sync/atomic"
+
+	"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"
+	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 Handler struct {
+	log               *zap.Logger
+	pool              *pool.Pool
+	ownerID           *user.ID
+	settings          *Settings
+	containerResolver *resolver.ContainerResolver
+	tree              *tree.Tree
+}
+
+// Settings stores reloading parameters, so it has to provide atomic getters and setters.
+type Settings struct {
+	defaultTimestamp atomic.Bool
+	zipCompression   atomic.Bool
+}
+
+func (s *Settings) DefaultTimestamp() bool {
+	return s.defaultTimestamp.Load()
+}
+
+func (s *Settings) SetDefaultTimestamp(val bool) {
+	s.defaultTimestamp.Store(val)
+}
+
+func (s *Settings) ZipCompression() bool {
+	return s.zipCompression.Load()
+}
+
+func (s *Settings) SetZipCompression(val bool) {
+	s.zipCompression.Store(val)
+}
+
+func New(params *utils.AppParams, settings *Settings, tree *tree.Tree) *Handler {
+	return &Handler{
+		log:               params.Logger,
+		pool:              params.Pool,
+		ownerID:           params.Owner,
+		settings:          settings,
+		containerResolver: params.Resolver,
+		tree:              tree,
+	}
+}
+
+// getContainerID decode container id, if it's not a valid container id
+// then trey to resolve name using provided resolver.
+func (h *Handler) getContainerID(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)
+	}
+	return cnrID, err
+}
+
+// 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)
+
+	cnrID, err := h.getContainerID(ctx, idCnr)
+	if err != nil {
+		log.Error(logs.WrongContainerID, 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(logs.WrongObjectID, zap.Error(err))
+		response.Error(c, "wrong object id", fasthttp.StatusBadRequest)
+		return
+	}
+
+	var addr oid.Address
+	addr.SetContainer(*cnrID)
+	addr.SetObject(*objID)
+
+	f(ctx, *h.newRequest(c, log), addr)
+}
+
+// byBucketname is a wrapper for function (e.g. request.headObject, request.receiveFile) that
+// prepares request and object address to it.
+func (h *Handler) byBucketname(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)
+
+	cnrID, err := h.getContainerID(ctx, bucketname)
+	if err != nil {
+		log.Error(logs.WrongContainerID, zap.Error(err))
+		response.Error(req, "wrong container id", fasthttp.StatusBadRequest)
+		return
+	}
+
+	foundOid, err := h.tree.GetLatestVersion(ctx, cnrID, key)
+	if err != nil {
+		log.Error(logs.ObjectWasntFound, 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(*cnrID)
+	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)) {
+	var (
+		scid, _ = c.UserValue("cid").(string)
+		key, _  = url.QueryUnescape(c.UserValue("attr_key").(string))
+		val, _  = url.QueryUnescape(c.UserValue("attr_val").(string))
+		log     = h.log.With(zap.String("cid", scid), zap.String("attr_key", key), zap.String("attr_val", val))
+	)
+
+	ctx := utils.GetContextFromRequest(c)
+
+	containerID, err := h.getContainerID(ctx, scid)
+	if err != nil {
+		log.Error(logs.WrongContainerID, zap.Error(err))
+		response.Error(c, "wrong container id", fasthttp.StatusBadRequest)
+		return
+	}
+
+	res, err := h.search(ctx, containerID, 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(*containerID)
+	addrObj.SetObject(buf[0])
+
+	f(ctx, *h.newRequest(c, log), addrObj)
+}

internal/handler/head.go

@@ -1,4 +1,4 @@
-package downloader
+package handler
 
 import (
 	"context"
@@ -25,7 +25,7 @@ const (
 	hdrContainerID = "X-Container-Id"
 )
 
-func headObject(ctx context.Context, req request, clnt *pool.Pool, objectAddress oid.Address) {
+func (h *Handler) headObject(ctx context.Context, req request, objectAddress oid.Address) {
 	var start = time.Now()
 
 	btoken := bearerToken(ctx)
@@ -36,7 +36,7 @@ func headObject(ctx context.Context, req request, clnt *pool.Pool, objectAddress
 		prm.UseBearer(*btoken)
 	}
 
-	obj, err := clnt.HeadObject(ctx, prm)
+	obj, err := h.pool.HeadObject(ctx, prm)
 	if err != nil {
 		req.handleFrostFSErr(err, start)
 		return
@@ -81,7 +81,7 @@ func headObject(ctx context.Context, req request, clnt *pool.Pool, objectAddress
 				prmRange.UseBearer(*btoken)
 			}
 
-			resObj, err := clnt.ObjectRange(ctx, prmRange)
+			resObj, err := h.pool.ObjectRange(ctx, prmRange)
 			if err != nil {
 				return nil, err
 			}
@@ -104,19 +104,19 @@ func idsToResponse(resp *fasthttp.Response, obj *object.Object) {
 }
 
 // HeadByAddressOrBucketName handles head requests using simple cid/oid or bucketname/key format.
-func (d *Downloader) HeadByAddressOrBucketName(c *fasthttp.RequestCtx) {
+func (h *Handler) HeadByAddressOrBucketName(c *fasthttp.RequestCtx) {
 	test, _ := c.UserValue("oid").(string)
 	var id oid.ID
 
 	err := id.DecodeString(test)
 	if err != nil {
-		d.byBucketname(c, headObject)
+		h.byBucketname(c, h.headObject)
 	} else {
-		d.byAddress(c, headObject)
+		h.byAddress(c, h.headObject)
 	}
 }
 
 // HeadByAttribute handles attribute-based head requests.
-func (d *Downloader) HeadByAttribute(c *fasthttp.RequestCtx) {
-	d.byAttribute(c, headObject)
+func (h *Handler) HeadByAttribute(c *fasthttp.RequestCtx) {
+	h.byAttribute(c, h.headObject)
 }

internal/handler/multipart.go

@@ -1,10 +1,10 @@
-package uploader
+package handler
 
 import (
 	"io"
 
+	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/multipart"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/uploader/multipart"
 	"go.uber.org/zap"
 )
 

internal/handler/multipart_test.go

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

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"
@@ -9,7 +9,6 @@ import (
 	"time"
 
 	"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/tokens"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
@@ -17,9 +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"
 )
 
@@ -28,55 +25,39 @@ const (
 	drainBufSize = 4096
 )
 
-// Uploader is an upload request handler.
-type Uploader struct {
-	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(params *utils.AppParams, settings *Settings) *Uploader {
-	return &Uploader{
-		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(req *fasthttp.RequestCtx) {
+func (h *Handler) Upload(req *fasthttp.RequestCtx) {
 	var (
 		file       MultipartFile
 		idObj      oid.ID
 		addr       oid.Address
 		scid, _    = req.UserValue("cid").(string)
-		log        = u.log.With(zap.String("cid", scid))
+		log        = h.log.With(zap.String("cid", scid))
 		bodyStream = req.RequestBodyStream()
 		drainBuf   = make([]byte, drainBufSize)
 	)
 
 	ctx := utils.GetContextFromRequest(req)
 
-	idCnr, err := utils.GetContainerID(ctx, scid, u.containerResolver)
+	idCnr, err := h.getContainerID(ctx, scid)
 	if err != nil {
 		log.Error(logs.WrongContainerID, zap.Error(err))
 		response.Error(req, "wrong container id", fasthttp.StatusBadRequest)
@@ -97,12 +78,12 @@ func (u *Uploader) Upload(req *fasthttp.RequestCtx) {
 		)
 	}()
 	boundary := string(req.Request.Header.MultipartFormBoundary())
-	if file, err = fetchMultipartFile(u.log, bodyStream, boundary); err != nil {
+	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, &req.Request.Header)
+	filtered, err := filterHeaders(h.log, &req.Request.Header)
 	if err != nil {
 		log.Error(logs.CouldNotProcessHeaders, zap.Error(err))
 		response.Error(req, err.Error(), fasthttp.StatusBadRequest)
@@ -118,7 +99,7 @@ func (u *Uploader) Upload(req *fasthttp.RequestCtx) {
 		}
 	}
 
-	if err = utils.PrepareExpirationHeader(req, u.pool, filtered, now); err != nil {
+	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
@@ -140,7 +121,7 @@ func (u *Uploader) Upload(req *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.settings.DefaultTimestamp() {
 		timestamp := object.NewAttribute()
 		timestamp.SetKey(object.AttributeTimestamp)
 		timestamp.SetValue(strconv.FormatInt(time.Now().Unix(), 10))
@@ -149,20 +130,20 @@ func (u *Uploader) Upload(req *fasthttp.RequestCtx) {
 
 	obj := object.New()
 	obj.SetContainerID(*idCnr)
-	obj.SetOwnerID(u.ownerID)
+	obj.SetOwnerID(h.ownerID)
 	obj.SetAttributes(attributes...)
 
 	var prm pool.PrmObjectPut
 	prm.SetHeader(*obj)
 	prm.SetPayload(file)
 
-	bt := u.fetchBearerToken(ctx)
+	bt := h.fetchBearerToken(ctx)
 	if bt != nil {
 		prm.UseBearer(*bt)
 	}
 
-	if idObj, err = u.pool.PutObject(ctx, prm); err != nil {
-		u.handlePutFrostFSErr(req, err)
+	if idObj, err = h.pool.PutObject(ctx, prm); err != nil {
+		h.handlePutFrostFSErr(req, err)
 		return
 	}
 
@@ -193,35 +174,17 @@ func (u *Uploader) Upload(req *fasthttp.RequestCtx) {
 	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(logs.CouldNotStoreFileInFrostfs, logFields...)
+	h.log.Error(logs.CouldNotStoreFileInFrostfs, logFields...)
 	response.Error(r, msg, statusCode)
 }
 
-func (u *Uploader) fetchBearerToken(ctx context.Context) *bearer.Token {
+func (h *Handler) fetchBearerToken(ctx context.Context) *bearer.Token {
 	if tkn, err := tokens.LoadBearerToken(ctx); err == nil && tkn != nil {
 		return tkn
 	}
 	return 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)
-}

internal/handler/utils.go

@@ -0,0 +1,60 @@
+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"
+	"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
+}

tree/tree.go

@@ -5,8 +5,8 @@ import (
 	"fmt"
 	"strings"
 
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/api"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/api/layer"
+	"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"
 )

utils/util.go

@@ -4,23 +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