修复bug,在使用分片上传时候，bucket.go的UploadObjectBySlice函数在打开文件后没有关闭，导致报too many…

… open files错误

cos/bucket.go

@@ -32,8 +32,6 @@ type ObjectSlice struct {
 // 获得云存储上文件信息
 func (b *Bucket) HeadObject(ctx context.Context, object string) error {
 	resq, err := b.conn.Do(ctx, "HEAD", b.Name, object, nil, nil, nil)
-	//fmt.Printf("%-18s: %d\n", "Content-Length", resq.ContentLength)
-	//fmt.Printf("%-18s: %s\n", "Content-Type", resq.c)
 	for k, v := range resq.Header {
 		value := fmt.Sprintf("%s", v)
 		fmt.Printf("%-18s: %s\n", k, strings.Replace(strings.Replace(value, "[", "", -1), "]", "", -1))
@@ -90,9 +88,9 @@ func (b *Bucket) UploadObjectBySlice(ctx context.Context, dst, src string, taskN
 	if err != nil {
 		return err
 	}
-	//fmt.Println(uploadID)
 
 	fd, err := os.Open(src)
+	defer fd.Close()
 	if err != nil {
 		return err
 	}

cos/conf.go

@@ -1,7 +1,7 @@
 package cos
 
 const (
-	defaultPartSize   = 60 * 1024 * 1024
+	defaultPartSize   = 80 * 1024 * 1024
 	defaultRetryTimes = 3
 	defaultUA         = "cos-go-sdk-v5.2.9"
 	defaultDomain     = "myqcloud.com"

cos/conn.go

@@ -26,7 +26,7 @@ func (conn *Conn) Do(ctx context.Context, method, bucket, object string, params
 	if err != nil {
 		return nil, err
 	}
-	fmt.Println(url)
+	//fmt.Println(url)
 	conn.signHeader(req, params, headers)
 	req.Header.Set("User-Agent", conn.conf.UA)
 	req.Header.Set("Content-Length", strconv.FormatInt(req.ContentLength, 10))