fix: cdn-source pattern supports range task

Signed-off-by: lowzj <[email protected]>

Author: lowzj

dfget/core/api/download_api.go

@@ -25,6 +25,7 @@ import (
 
 	"github.com/dragonflyoss/Dragonfly/dfget/config"
 	"github.com/dragonflyoss/Dragonfly/pkg/httputils"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 	"github.com/dragonflyoss/Dragonfly/version"
 )
 
@@ -56,8 +57,10 @@ func NewDownloadAPI() DownloadAPI {
 }
 
 func (d *downloadAPI) Download(ip string, port int, req *DownloadRequest, timeout time.Duration) (*http.Response, error) {
+	if req == nil {
+		return nil, fmt.Errorf("nil dwonload request")
+	}
 	headers := make(map[string]string)
-	headers[config.StrRange] = config.StrBytes + "=" + req.PieceRange
 	headers[config.StrPieceNum] = strconv.Itoa(req.PieceNum)
 	headers[config.StrPieceSize] = fmt.Sprint(req.PieceSize)
 	headers[config.StrUserAgent] = "dfget/" + version.DFGetVersion
@@ -67,12 +70,52 @@ func (d *downloadAPI) Download(ip string, port int, req *DownloadRequest, timeou
 		}
 	}
 
-	var url string
-	if strings.Contains(req.Path, "://") {
+	var (
+		url      string
+		rangeStr string
+	)
+	if isFromSource(req) {
+		rangeStr = getRealRange(req.PieceRange, headers[config.StrRange])
 		url = req.Path
 	} else {
+		rangeStr = req.PieceRange
 		url = fmt.Sprintf("http://%s:%d%s", ip, port, req.Path)
 	}
+	headers[config.StrRange] = httputils.ConstructRangeStr(rangeStr)
 
 	return httputils.HTTPGetTimeout(url, headers, timeout)
 }
+
+func isFromSource(req *DownloadRequest) bool {
+	return strings.Contains(req.Path, "://")
+}
+
+// getRealRange
+// pieceRange: "start-end"
+// rangeHeaderValue: "bytes=sourceStart-sourceEnd"
+// return: "realStart-realEnd"
+func getRealRange(pieceRange string, rangeHeaderValue string) string {
+	if rangeHeaderValue == "" {
+		return pieceRange
+	}
+	rangeEle := strings.Split(rangeHeaderValue, "=")
+	if len(rangeEle) != 2 {
+		return pieceRange
+	}
+
+	lower, upper, err := rangeutils.ParsePieceIndex(rangeEle[1])
+	if err != nil {
+		return pieceRange
+	}
+	start, end, err := rangeutils.ParsePieceIndex(pieceRange)
+	if err != nil {
+		return pieceRange
+	}
+
+	realStart := start + lower
+	realEnd := end + lower
+	if realEnd > upper {
+		realEnd = upper
+	}
+	return fmt.Sprintf("%d-%d", realStart, realEnd)
+}

dfget/core/api/download_api_test.go

@@ -0,0 +1,51 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package api
+
+import (
+	"github.com/go-check/check"
+)
+
+type DownloadAPITestSuite struct {
+}
+
+func init() {
+	check.Suite(&DownloadAPITestSuite{})
+}
+
+// ----------------------------------------------------------------------------
+// unit tests for DownloadAPI
+
+func (s *DownloadAPITestSuite) TestGetRealRange(c *check.C) {
+	cases := []struct {
+		pieceRange string
+		rangeValue string
+		expected   string
+	}{
+		{"0-1", "", "0-1"},
+		{"0-1", "1-100", "1-2"},
+		{"0-100", "1-100", "1-100"},
+		{"100-100", "1-100", "101-100"},
+		{"100-200", "1-100", "101-100"},
+	}
+
+	for _, v := range cases {
+		res := getRealRange(v.pieceRange, "bytes="+v.rangeValue)
+		c.Assert(res, check.Equals, v.expected,
+			check.Commentf("%v", v))
+	}
+}

supernode/util/range_util.go renamed to pkg/rangeutils/range_util.go

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package util
+package rangeutils
 
 import (
 	"fmt"
@@ -23,7 +23,8 @@ import (
 )
 
 const (
-	separator = "-"
+	separator         = "-"
+	invalidPieceIndex = -1
 )
 
 // CalculatePieceSize calculates the size of piece
@@ -51,23 +52,24 @@ func CalculatePieceNum(rangeStr string) int {
 }
 
 // ParsePieceIndex parses the start and end index ​​according to range string.
+// rangeStr: "start-end"
 func ParsePieceIndex(rangeStr string) (start, end int64, err error) {
 	ranges := strings.Split(rangeStr, separator)
 	if len(ranges) != 2 {
-		return -1, -1, fmt.Errorf("range value(%s) is illegal which should be like 0-45535", rangeStr)
+		return invalidPieceIndex, invalidPieceIndex, fmt.Errorf("range value(%s) is illegal which should be like 0-45535", rangeStr)
 	}
 
 	startIndex, err := strconv.ParseInt(ranges[0], 10, 64)
 	if err != nil {
-		return -1, -1, fmt.Errorf("range(%s) start is not a number", rangeStr)
+		return invalidPieceIndex, invalidPieceIndex, fmt.Errorf("range(%s) start is not a number", rangeStr)
 	}
 	endIndex, err := strconv.ParseInt(ranges[1], 10, 64)
 	if err != nil {
-		return -1, -1, fmt.Errorf("range(%s) end is not a number", rangeStr)
+		return invalidPieceIndex, invalidPieceIndex, fmt.Errorf("range(%s) end is not a number", rangeStr)
 	}
 
 	if endIndex < startIndex {
-		return -1, -1, fmt.Errorf("range(%s) start is larger than end", rangeStr)
+		return invalidPieceIndex, invalidPieceIndex, fmt.Errorf("range(%s) start is larger than end", rangeStr)
 	}
 
 	return startIndex, endIndex, nil

supernode/util/range_util_test.go renamed to pkg/rangeutils/range_util_test.go

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package util
+package rangeutils
 
 import (
 	"testing"

supernode/daemon/mgr/cdn/downloader.go

@@ -20,12 +20,12 @@ import (
 	"context"
 	"net/http"
 
-	errorType "github.com/dragonflyoss/Dragonfly/pkg/errortypes"
-	"github.com/dragonflyoss/Dragonfly/pkg/httputils"
-	"github.com/dragonflyoss/Dragonfly/supernode/util"
-
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
+
+	errorType "github.com/dragonflyoss/Dragonfly/pkg/errortypes"
+	"github.com/dragonflyoss/Dragonfly/pkg/httputils"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 )
 
 // download downloads the file from the original address and
@@ -38,7 +38,7 @@ func (cm *Manager) download(ctx context.Context, taskID, url string, headers map
 	checkCode := []int{http.StatusOK, http.StatusPartialContent}
 
 	if startPieceNum > 0 {
-		breakRange, err := util.CalculateBreakRange(startPieceNum, int(pieceContSize), httpFileLength)
+		breakRange, err := rangeutils.CalculateBreakRange(startPieceNum, int(pieceContSize), httpFileLength)
 		if err != nil {
 			return nil, errors.Wrapf(errorType.ErrInvalidValue, "failed to calculate the breakRange: %v", err)
 		}

supernode/daemon/mgr/cdn/manager.go

@@ -26,6 +26,7 @@ import (
 	"github.com/dragonflyoss/Dragonfly/pkg/limitreader"
 	"github.com/dragonflyoss/Dragonfly/pkg/metricsutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/netutils"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/ratelimiter"
 	"github.com/dragonflyoss/Dragonfly/pkg/stringutils"
 	"github.com/dragonflyoss/Dragonfly/supernode/config"
@@ -216,7 +217,7 @@ func (cm *Manager) GetPieceMD5(ctx context.Context, taskID string, pieceNum int,
 
 	if source == PieceMd5SourceFile {
 		// get piece length
-		start, end, err := util.ParsePieceIndex(pieceRange)
+		start, end, err := rangeutils.ParsePieceIndex(pieceRange)
 		if err != nil {
 			return "", errors.Wrapf(err, "failed to parse piece range(%s)", pieceRange)
 		}

supernode/daemon/mgr/pieceerror/md5_not_match.go

@@ -19,11 +19,11 @@ package pieceerror
 import (
 	"context"
 
+	"github.com/sirupsen/logrus"
+
 	"github.com/dragonflyoss/Dragonfly/apis/types"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 	"github.com/dragonflyoss/Dragonfly/supernode/daemon/mgr"
-	"github.com/dragonflyoss/Dragonfly/supernode/util"
-
-	"github.com/sirupsen/logrus"
 )
 
 var _ Handler = &FileMd5NotMatchHandler{}
@@ -45,7 +45,7 @@ func NewFileMd5NotMatchHandler(gcManager mgr.GCMgr, cdnManager mgr.CDNMgr) (Hand
 }
 
 func (fnmh *FileMd5NotMatchHandler) Handle(ctx context.Context, pieceErrorRequest *types.PieceErrorRequest) error {
-	pieceNum := util.CalculatePieceNum(pieceErrorRequest.Range)
+	pieceNum := rangeutils.CalculatePieceNum(pieceErrorRequest.Range)
 
 	// get piece MD5 by reading the meta file
 	metaPieceMD5, err := fnmh.cdnManager.GetPieceMD5(ctx, pieceErrorRequest.TaskID, pieceNum, pieceErrorRequest.Range, "meta")

supernode/daemon/mgr/task/manager.go

@@ -23,6 +23,7 @@ import (
 	"github.com/dragonflyoss/Dragonfly/apis/types"
 	"github.com/dragonflyoss/Dragonfly/pkg/errortypes"
 	"github.com/dragonflyoss/Dragonfly/pkg/metricsutils"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/stringutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/syncmap"
 	"github.com/dragonflyoss/Dragonfly/supernode/config"
@@ -272,7 +273,7 @@ func (tm *Manager) UpdatePieceStatus(ctx context.Context, taskID, pieceRange str
 	logrus.Debugf("get update piece status request: %+v with taskID(%s) pieceRange(%s)", pieceUpdateRequest, taskID, pieceRange)
 
 	// calculate the pieceNum according to the pieceRange
-	pieceNum := util.CalculatePieceNum(pieceRange)
+	pieceNum := rangeutils.CalculatePieceNum(pieceRange)
 	if pieceNum == -1 {
 		return errors.Wrapf(errortypes.ErrInvalidValue,
 			"failed to parse pieceRange: %s to pieceNum for taskID: %s, clientID: %s",

supernode/daemon/mgr/task/manager_util.go

@@ -26,6 +26,7 @@ import (
 	"github.com/dragonflyoss/Dragonfly/pkg/digest"
 	"github.com/dragonflyoss/Dragonfly/pkg/errortypes"
 	"github.com/dragonflyoss/Dragonfly/pkg/netutils"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/stringutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/timeutils"
 	"github.com/dragonflyoss/Dragonfly/supernode/config"
@@ -290,7 +291,7 @@ func (tm *Manager) processTaskStart(ctx context.Context, srcCID string, task *ty
 // req.DstPID, req.PieceRange, req.PieceResult, req.DfgetTaskStatus
 func (tm *Manager) processTaskRunning(ctx context.Context, srcCID, srcPID string, task *types.TaskInfo, req *types.PiecePullRequest,
 	dfgetTask *types.DfGetTask) (bool, interface{}, error) {
-	pieceNum := util.CalculatePieceNum(req.PieceRange)
+	pieceNum := rangeutils.CalculatePieceNum(req.PieceRange)
 	if pieceNum == -1 {
 		return false, nil, errors.Wrapf(errortypes.ErrInvalidValue, "pieceRange: %s", req.PieceRange)
 	}
@@ -411,7 +412,7 @@ func (tm *Manager) pieceResultToPieceInfo(ctx context.Context, pr *mgr.PieceResu
 		PeerIP:     peer.IP.String(),
 		PeerPort:   peer.Port,
 		PieceMD5:   pieceMD5,
-		PieceRange: util.CalculatePieceRange(pr.PieceNum, pieceSize),
+		PieceRange: rangeutils.CalculatePieceRange(pr.PieceNum, pieceSize),
 		PieceSize:  pieceSize,
 	}, nil
 }

supernode/server/0.3_bridge.go

@@ -21,17 +21,17 @@ import (
 	"encoding/json"
 	"net/http"
 
+	"github.com/go-openapi/strfmt"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+
 	"github.com/dragonflyoss/Dragonfly/apis/types"
 	"github.com/dragonflyoss/Dragonfly/pkg/constants"
 	"github.com/dragonflyoss/Dragonfly/pkg/errortypes"
 	"github.com/dragonflyoss/Dragonfly/pkg/netutils"
+	"github.com/dragonflyoss/Dragonfly/pkg/rangeutils"
 	"github.com/dragonflyoss/Dragonfly/pkg/stringutils"
-	sutil "github.com/dragonflyoss/Dragonfly/supernode/util"
-
-	"github.com/go-openapi/strfmt"
-	"github.com/gorilla/schema"
-	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
 )
 
 // RegisterResponseData is the data when registering supernode successfully.
@@ -200,7 +200,7 @@ func (s *Server) pullPieceTask(ctx context.Context, rw http.ResponseWriter, req
 		}
 		datas = append(datas, &PullPieceTaskResponseContinueData{
 			Range:     v.PieceRange,
-			PieceNum:  sutil.CalculatePieceNum(v.PieceRange),
+			PieceNum:  rangeutils.CalculatePieceNum(v.PieceRange),
 			PieceSize: v.PieceSize,
 			PieceMd5:  v.PieceMD5,
 			Cid:       cid,
@@ -229,7 +229,7 @@ func (s *Server) reportPiece(ctx context.Context, rw http.ResponseWriter, req *h
 
 	// If piece is downloaded from supernode, add metrics.
 	if s.Config.IsSuperCID(dstCID) {
-		m.pieceDownloadedBytes.WithLabelValues().Add(float64(sutil.CalculatePieceSize(pieceRange)))
+		m.pieceDownloadedBytes.WithLabelValues().Add(float64(rangeutils.CalculatePieceSize(pieceRange)))
 	}
 
 	request := &types.PieceUpdateRequest{