Feat: client method to upload file from master node to slave node

pkg/retry/backoff.go

@@ -0,0 +1,26 @@
+package retry
+
+import "time"
+
+// Backoff used for retry sleep backoff
+type Backoff interface {
+	Next() bool
+}
+
+// ConstantBackoff implements Backoff interface with constant sleep time
+type ConstantBackoff struct {
+	Sleep time.Duration
+	Max   int
+
+	tried int
+}
+
+func (c ConstantBackoff) Next() bool {
+	c.tried++
+	if c.tried >= c.Max {
+		return false
+	}
+
+	time.Sleep(c.Sleep)
+	return true
+}

pkg/retry/chunk.go

@@ -0,0 +1,29 @@
+package retry
+
+import (
+	"context"
+	"fmt"
+	"github.com/cloudreve/Cloudreve/v3/pkg/filesystem/fsctx"
+	"github.com/cloudreve/Cloudreve/v3/pkg/util"
+	"io"
+)
+
+type ChunkProcessFunc func(index int, chunk io.Reader) error
+
+func Chunk(index int, chunkSize uint64, file fsctx.FileHeader, processor ChunkProcessFunc, backoff Backoff) error {
+	err := processor(index, file)
+	if err != nil {
+		if err != context.Canceled && file.Seekable() && backoff.Next() {
+			if _, seekErr := file.Seek(int64(uint64(index)*chunkSize), io.SeekStart); err != nil {
+				return fmt.Errorf("failed to seek back to chunk start: %w, last error: %w", seekErr, err)
+			}
+
+			util.Log().Debug("Retrying chunk %d, last error: %s", index, err)
+			return Chunk(index, chunkSize, file, processor, backoff)
+		}
+
+		return err
+	}
+
+	return nil
+}