remove upload useless code

internal/file/uploader/multiworker.go

@@ -65,76 +65,74 @@ func (muer *MultiUploader) upload() (uperr error) {
 	uploadClient.SetTimeout(0)
 	uploadClient.SetKeepAlive(true)
 
+	// 阿里云盘只支持分片按顺序上传，这里正常应该是parallel = 1
+	wg := waitgroup.NewWaitGroup(muer.config.Parallel)
 	for {
-		// 阿里云盘只支持分片按顺序上传，这里正常应该是parallel = 1
-		wg := waitgroup.NewWaitGroup(muer.config.Parallel)
-		for {
-			e := uploadDeque.Shift()
-			if e == nil { // 任务为空
-				break
-			}
-
-			wer := e.(*worker)
-			wg.AddDelta()
-			go func() {
-				defer wg.Done()
-
-				var (
-					ctx, cancel = context.WithCancel(context.Background())
-					doneChan    = make(chan struct{})
-					uploadDone  bool
-					terr        error
-				)
-				go func() {
-					if !wer.uploadDone {
-						uploaderVerbose.Info("begin to upload part: " + strconv.Itoa(wer.id))
-						uploadDone, terr = muer.multiUpload.UploadFile(ctx, int(wer.id), wer.partOffset, wer.splitUnit.Range().End, wer.splitUnit, uploadClient)
-					} else {
-						uploadDone = true
-					}
-					close(doneChan)
-				}()
-				select {
-				case <-muer.canceled:
-					cancel()
-					return
-				case <-doneChan:
-					// continue
-					uploaderVerbose.Info("multiUpload worker upload file done")
-				}
-				cancel()
-				if terr != nil {
-					if me, ok := terr.(*MultiError); ok {
-						if me.Terminated { // 终止
-							muer.closeCanceledOnce.Do(func() { // 只关闭一次
-								close(muer.canceled)
-							})
-							uperr = me.Err
-							return
-						} else if me.NeedStartOver {
-							uploaderVerbose.Warnf("upload start over: %d\n", wer.id)
-							// 从头开始上传
-							muer.closeCanceledOnce.Do(func() { // 只关闭一次
-								close(muer.canceled)
-							})
-							uperr = me.Err
-							return
-						}
-					}
-
-					uploaderVerbose.Warnf("upload err: %s, id: %d\n", terr, wer.id)
-					wer.splitUnit.Seek(0, os.SEEK_SET)
-					uploadDeque.Append(wer)
-					return
-				}
-				wer.uploadDone = uploadDone
-
-				// 通知更新
-				if muer.updateInstanceStateChan != nil && len(muer.updateInstanceStateChan) < cap(muer.updateInstanceStateChan) {
-					muer.updateInstanceStateChan <- struct{}{}
-				}
-			}()
+		e := uploadDeque.Shift()
+		if e == nil { // 任务为空
+			break
 		}
+
+		wer := e.(*worker)
+		wg.AddDelta()
+		go func() { // 异步上传
+			defer wg.Done()
+
+			var (
+				ctx, cancel = context.WithCancel(context.Background())
+				doneChan    = make(chan struct{})
+				uploadDone  bool
+				terr        error
+			)
+			go func() {
+				if !wer.uploadDone {
+					uploaderVerbose.Info("begin to upload part: " + strconv.Itoa(wer.id))
+					uploadDone, terr = muer.multiUpload.UploadFile(ctx, int(wer.id), wer.partOffset, wer.splitUnit.Range().End, wer.splitUnit, uploadClient)
+				} else {
+					uploadDone = true
+				}
+				close(doneChan)
+			}()
+			select { // 监听上传进程，循环
+			case <-muer.canceled:
+				cancel()
+				return
+			case <-doneChan:
+				// continue
+				uploaderVerbose.Info("multiUpload worker upload file done")
+			}
+			cancel()
+			if terr != nil {
+				if me, ok := terr.(*MultiError); ok {
+					if me.Terminated { // 终止
+						muer.closeCanceledOnce.Do(func() { // 只关闭一次
+							close(muer.canceled)
+						})
+						uperr = me.Err
+						return
+					} else if me.NeedStartOver {
+						uploaderVerbose.Warnf("upload start over: %d\n", wer.id)
+						// 从头开始上传
+						muer.closeCanceledOnce.Do(func() { // 只关闭一次
+							close(muer.canceled)
+						})
+						uperr = me.Err
+						return
+					}
+				}
+
+				uploaderVerbose.Warnf("upload err: %s, id: %d\n", terr, wer.id)
+				wer.splitUnit.Seek(0, os.SEEK_SET)
+				uploadDeque.Append(wer)
+				return
+			}
+			wer.uploadDone = uploadDone
+
+			// 通知更新
+			if muer.updateInstanceStateChan != nil && len(muer.updateInstanceStateChan) < cap(muer.updateInstanceStateChan) {
+				muer.updateInstanceStateChan <- struct{}{}
+			}
+		}()
 		wg.Wait()
 
 		// 没有任务了