fix(chunk): 更新Get方法中的chunkSizes检查逻辑以处理缺失的块

Author: j2rong4cn

drivers/chunk/driver.go

@@ -77,6 +77,7 @@ func (d *Chunk) Get(ctx context.Context, path string) (model.Obj, error) {
 		return nil, err
 	}
 	var totalSize int64 = 0
+	// 默认第一个是-1
 	chunkSizes := []int64{-1}
 	h := make(map[*utils.HashType]string)
 	var first model.Obj
@@ -113,8 +114,12 @@ func (d *Chunk) Get(ctx context.Context, path string) (model.Obj, error) {
 			chunkSizes[idx] = o.GetSize()
 		}
 	}
+	// 只需检查0到倒数第二个
 	for i, l := 0, len(chunkSizes)-2; ; i++ {
-		if (i == 0 && chunkSizes[i] == -1) || chunkSizes[i] == 0 {
+		if chunkSizes[i] <= 0 {
+			if i == 0 {
+				return nil, fmt.Errorf("no chunks found")
+			}
 			return nil, fmt.Errorf("chunk part[%d] are missing", i)
 		}
 		if i >= l {