[#227] Add versionID header after complete multipart

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

CHANGELOG.md

@@ -34,6 +34,7 @@ This document outlines major changes between releases.
 - Add new `kludge.bypass_content_encoding_check_in_chunks` config param (#146)
 - Add new `frostfs.client_cut` config param (#192)
 - Add new `frostfs.buffer_max_size_for_put` config param and sync TZ hash for PUT operations (#197)
+- Add `X-Amz-Version-Id` header after complete multipart upload (#227)
 
 ### Changed
 - Update prometheus to v1.15.0 (#94)
@@ -53,6 +54,7 @@ This document outlines major changes between releases.
 
 ### Removed
 - Drop `tree.service` param (now endpoints from `peers` section are used) (#133)
+- Drop sending whitespace characters during complete multipart upload and related config param `kludge.complete_multipart_keepalive` (#227)
 
 ## [0.27.0] - Karpinsky - 2023-07-12
 

api/handler/api.go

@@ -40,7 +40,6 @@ type (
 		NotificatorEnabled() bool
 		ResolveZoneList() []string
 		IsResolveListAllow() bool
-		CompleteMultipartKeepalive() time.Duration
 		BypassContentEncodingInChunks() bool
 		MD5Enabled() bool
 	}

api/handler/multipart_upload.go

@@ -3,7 +3,6 @@ package handler
 import (
 	"encoding/xml"
 	"fmt"
-	"io"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -399,6 +398,12 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 		return
 	}
 
+	settings, err := h.obj.GetBucketSettings(r.Context(), bktInfo)
+	if err != nil {
+		h.logAndSendError(w, "could not get bucket settings", reqInfo, err)
+		return
+	}
+
 	var (
 		uploadID   = r.URL.Query().Get(uploadIDHeaderName)
 		uploadInfo = &layer.UploadInfoParams{
@@ -425,29 +430,12 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 		Parts: reqBody.Parts,
 	}
 
-	// Next operations might take some time, so we want to keep client's
-	// connection alive. To do so, gateway sends periodic white spaces
-	// back to the client the same way as Amazon S3 service does.
-	stopPeriodicResponseWriter := periodicXMLWriter(w, h.cfg.CompleteMultipartKeepalive())
-
 	// Start complete multipart upload which may take some time to fetch object
 	// and re-upload it part by part.
 	objInfo, err := h.completeMultipartUpload(r, c, bktInfo, reqInfo)
 
-	// Stop periodic writer as complete multipart upload is finished
-	// successfully or not.
-	headerIsWritten := stopPeriodicResponseWriter()
-
-	responseWriter := middleware.EncodeToResponse
-	errLogger := h.logAndSendError
-	// Do not send XML and HTTP headers if periodic writer was invoked at this point.
-	if headerIsWritten {
-		responseWriter = middleware.EncodeToResponseNoHeader
-		errLogger = h.logAndSendErrorNoHeader
-	}
-
 	if err != nil {
-		errLogger(w, "complete multipart error", reqInfo, err, additional...)
+		h.logAndSendError(w, "complete multipart error", reqInfo, err, additional...)
 		return
 	}
 
@@ -457,12 +445,12 @@ func (h *handler) CompleteMultipartUploadHandler(w http.ResponseWriter, r *http.
 		ETag:   objInfo.ETag(h.cfg.MD5Enabled()),
 	}
 
-	// Here we previously set api.AmzVersionID header for versioned bucket.
+	if settings.VersioningEnabled() {
-	// It is not possible after #60, because of periodic white
+		w.Header().Set(api.AmzVersionID, objInfo.VersionID())
-	// space XML writer to keep connection with the client.
+	}
 
-	if err = responseWriter(w, response); err != nil {
+	if err = middleware.EncodeToResponse(w, response); err != nil {
-		errLogger(w, "something went wrong", reqInfo, err, additional...)
+		h.logAndSendError(w, "something went wrong", reqInfo, err, additional...)
 	}
 }
 
@@ -730,53 +718,3 @@ func encodeListPartsToResponse(info *layer.ListPartsInfo, params *layer.ListPart
 		StorageClass:     api.DefaultStorageClass,
 	}
 }
-
-// periodicXMLWriter creates go routine to write xml header and whitespaces
-// over time to avoid connection drop from the client. To work properly,
-// pass `http.ResponseWriter` with implemented `http.Flusher` interface.
-// Returns stop function which returns boolean if writer has been used
-// during goroutine execution. To disable writer, pass 0 duration value.
-func periodicXMLWriter(w io.Writer, dur time.Duration) (stop func() bool) {
-	if dur == 0 { // 0 duration disables periodic writer
-		return func() bool { return false }
-	}
-
-	whitespaceChar := []byte(" ")
-	closer := make(chan struct{})
-	done := make(chan struct{})
-	headerWritten := false
-
-	go func() {
-		defer close(done)
-
-		tick := time.NewTicker(dur)
-		defer tick.Stop()
-
-		for {
-			select {
-			case <-tick.C:
-				if !headerWritten {
-					_, err := w.Write([]byte(xml.Header))
-					headerWritten = err == nil
-				}
-				_, err := w.Write(whitespaceChar)
-				if err != nil {
-					return // is there anything we can do better than ignore error?
-				}
-				if buffered, ok := w.(http.Flusher); ok {
-					buffered.Flush()
-				}
-			case <-closer:
-				return
-			}
-		}
-	}()
-
-	stop = func() bool {
-		close(closer)
-		<-done // wait for goroutine to stop
-		return headerWritten
-	}
-
-	return stop
-}

api/handler/multipart_upload_test.go

@@ -1,7 +1,6 @@
 package handler
 
 import (
-	"bytes"
 	"crypto/md5"
 	"encoding/hex"
 	"encoding/xml"
@@ -10,7 +9,6 @@ import (
 	"net/url"
 	"strconv"
 	"testing"
-	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api"
 	s3Errors "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
@@ -22,44 +20,6 @@ const (
 	partNumberMarkerQuery = "part-number-marker"
 )
 
-func TestPeriodicWriter(t *testing.T) {
-	const dur = 100 * time.Millisecond
-	const whitespaces = 8
-	expected := []byte(xml.Header)
-	for i := 0; i < whitespaces; i++ {
-		expected = append(expected, []byte(" ")...)
-	}
-
-	t.Run("writes data", func(t *testing.T) {
-		buf := bytes.NewBuffer(nil)
-		stop := periodicXMLWriter(buf, dur)
-
-		// N number of whitespaces + half durations to guarantee at least N writes in buffer
-		time.Sleep(whitespaces*dur + dur/2)
-		require.True(t, stop())
-		require.Equal(t, expected, buf.Bytes())
-
-		t.Run("no additional data after stop", func(t *testing.T) {
-			time.Sleep(2 * dur)
-			require.Equal(t, expected, buf.Bytes())
-		})
-	})
-
-	t.Run("does not write data", func(t *testing.T) {
-		buf := bytes.NewBuffer(nil)
-		stop := periodicXMLWriter(buf, dur)
-		time.Sleep(dur / 2)
-		require.False(t, stop())
-		require.Empty(t, buf.Bytes())
-
-		t.Run("disabled", func(t *testing.T) {
-			stop = periodicXMLWriter(buf, 0)
-			require.False(t, stop())
-			require.Empty(t, buf.Bytes())
-		})
-	})
-}
-
 func TestMultipartUploadInvalidPart(t *testing.T) {
 	hc := prepareHandlerContext(t)
 

api/handler/util.go

@@ -56,22 +56,6 @@ func handleDeleteMarker(w http.ResponseWriter, err error) error {
 	return fmt.Errorf("%w: %s", s3errors.GetAPIError(target.ErrorCode), err)
 }
 
-func (h *handler) logAndSendErrorNoHeader(w http.ResponseWriter, logText string, reqInfo *middleware.ReqInfo, err error, additional ...zap.Field) {
-	middleware.WriteErrorResponseNoHeader(w, reqInfo, transformToS3Error(err))
-	fields := []zap.Field{
-		zap.String("request_id", reqInfo.RequestID),
-		zap.String("method", reqInfo.API),
-		zap.String("bucket", reqInfo.BucketName),
-		zap.String("object", reqInfo.ObjectName),
-		zap.String("description", logText),
-		zap.Error(err)}
-	fields = append(fields, additional...)
-	if traceID, err := trace.TraceIDFromHex(reqInfo.TraceID); err == nil && traceID.IsValid() {
-		fields = append(fields, zap.String("trace_id", reqInfo.TraceID))
-	}
-	h.log.Error(logs.RequestFailed, fields...) // consider using h.reqLogger (it requires accept context.Context or http.Request)
-}
-
 func transformToS3Error(err error) error {
 	err = frosterrors.UnwrapErr(err) // this wouldn't work with errors.Join
 	if _, ok := err.(s3errors.Error); ok {

api/middleware/response.go

@@ -141,13 +141,6 @@ func WriteErrorResponse(w http.ResponseWriter, reqInfo *ReqInfo, err error) int
 	return code
 }
 
-// WriteErrorResponseNoHeader writes XML encoded error to the response body.
-func WriteErrorResponseNoHeader(w http.ResponseWriter, reqInfo *ReqInfo, err error) {
-	errorResponse := getAPIErrorResponse(reqInfo, err)
-	encodedErrorResponse := EncodeResponse(errorResponse)
-	WriteResponseBody(w, encodedErrorResponse)
-}
-
 // Write http common headers.
 func setCommonHeaders(w http.ResponseWriter) {
 	w.Header().Set(hdrServerInfo, version.Server)

cmd/s3-gw/app.go

@@ -75,7 +75,6 @@ type (
 		notificatorEnabled bool
 		resolveZoneList    []string
 		isResolveListAllow bool // True if ResolveZoneList contains allowed zones
-		completeMultipartKeepalive time.Duration
 
 		mu                            sync.RWMutex
 		defaultPolicy                 netmap.PlacementPolicy
@@ -179,7 +178,6 @@ func newAppSettings(log *Logger, v *viper.Viper) *appSettings {
 		defaultXMLNS:       v.GetBool(cfgKludgeUseDefaultXMLNS),
 		defaultMaxAge:      fetchDefaultMaxAge(v, log.logger),
 		notificatorEnabled: v.GetBool(cfgEnableNATS),
-		completeMultipartKeepalive: v.GetDuration(cfgKludgeCompleteMultipartUploadKeepalive),
 	}
 
 	settings.resolveZoneList = v.GetStringSlice(cfgResolveBucketAllow)
@@ -310,10 +308,6 @@ func (s *appSettings) IsResolveListAllow() bool {
 	return s.isResolveListAllow
 }
 
-func (s *appSettings) CompleteMultipartKeepalive() time.Duration {
-	return s.completeMultipartKeepalive
-}
-
 func (s *appSettings) MD5Enabled() bool {
 	s.mu.RLock()
 	defer s.mu.RUnlock()

cmd/s3-gw/app_settings.go

@@ -134,7 +134,6 @@ const ( // Settings.
 
 	// Kludge.
 	cfgKludgeUseDefaultXMLNS                    = "kludge.use_default_xmlns"
-	cfgKludgeCompleteMultipartUploadKeepalive   = "kludge.complete_multipart_keepalive"
 	cfgKludgeBypassContentEncodingCheckInChunks = "kludge.bypass_content_encoding_check_in_chunks"
 
 	// Web.
@@ -547,7 +546,6 @@ func newSettings() *viper.Viper {
 
 	// kludge
 	v.SetDefault(cfgKludgeUseDefaultXMLNS, false)
-	v.SetDefault(cfgKludgeCompleteMultipartUploadKeepalive, 10*time.Second)
 	v.SetDefault(cfgKludgeBypassContentEncodingCheckInChunks, false)
 
 	// web

config/config.env

@@ -140,8 +140,6 @@ S3_GW_RESOLVE_BUCKET_ALLOW=container
 
 # Enable using default xml namespace `http://s3.amazonaws.com/doc/2006-03-01/` when parse xml bodies.
 S3_GW_KLUDGE_USE_DEFAULT_XMLNS=false
-# Set timeout between whitespace transmissions during CompleteMultipartUpload processing.
-S3_GW_KLUDGE_COMPLETE_MULTIPART_KEEPALIVE=10s
 # Use this flag to be able to use chunked upload approach without having `aws-chunked` value in `Content-Encoding` header.
 S3_GW_BYPASS_CONTENT_ENCODING_CHECK_IN_CHUNKS=false
 

config/config.yaml

@@ -169,8 +169,6 @@ resolve_bucket:
 kludge:
   # Enable using default xml namespace `http://s3.amazonaws.com/doc/2006-03-01/` when parse xml bodies.
   use_default_xmlns: false
-  # Set timeout between whitespace transmissions during CompleteMultipartUpload processing.
-  complete_multipart_keepalive: 10s
   # Use this flag to be able to use chunked upload approach without having `aws-chunked` value in `Content-Encoding` header.
   bypass_content_encoding_check_in_chunks: false
 

docs/configuration.md

@@ -543,14 +543,12 @@ Workarounds for non-standard use cases.
 ```yaml
 kludge:
   use_default_xmlns: false
-  complete_multipart_keepalive: 10s
   bypass_content_encoding_check_in_chunks: false
 ```
 
 | Parameter                                 | Type       | SIGHUP reload | Default value | Description                                                                                                                     |
 |-------------------------------------------|------------|---------------|---------------|---------------------------------------------------------------------------------------------------------------------------------|
 | `use_default_xmlns`                       | `bool`     | yes           | false         | Enable using default xml namespace `http://s3.amazonaws.com/doc/2006-03-01/` when parse xml bodies.                             |
-| `complete_multipart_keepalive`            | `duration` | no            | 10s           | Set timeout between whitespace transmissions during CompleteMultipartUpload processing.                                         |
 | `bypass_content_encoding_check_in_chunks` | `bool`     | yes           | false         | Use this flag to be able to use [chunked upload approach](https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html) without having `aws-chunked` value in `Content-Encoding` header. |
 
 # `runtime` section