update

pkg/app/process.go

@@ -264,11 +264,15 @@ func (r *Reader) Read(p []byte) (n int,err error) {
 }
 
 func DownLoadFile(url string,file string) error {
+	var (
+		buf     = make([]byte, 32*1024)
+	)
 	r,err := http.Get(url)
 	if err != nil {
 		return err
 	}
 	defer func() {
+		DPercent.Current = r.ContentLength
 		r.Body.Close()
 	}()
 
@@ -280,10 +284,40 @@ func DownLoadFile(url string,file string) error {
 		f.Close()
 	}()
 	DPercent.Total = r.ContentLength
-	reader := &Reader{
-		Reader:r.Body,
-		Total:r.ContentLength,
+	//reader := &Reader{
+	//	Reader:r.Body,
+	//	Total:r.ContentLength,
+	//}
+	//io.Copy(f,reader)
+	for {
+		//读取bytes
+		nr, er := r.Body.Read(buf)
+		if nr > 0 {
+			//写入bytes
+			nw, ew := f.Write(buf[0:nr])
+			//数据长度大于0
+			if nw > 0 {
+				DPercent.Current += int64(nw)
+			}
+			//写入出错
+			if ew != nil {
+				err = ew
+				break
+			}
+			//读取是数据长度不等于写入的数据长度
+			if nr != nw {
+				err = io.ErrShortWrite
+				break
+			}
 		}
-	io.Copy(f,reader)
+		if er != nil {
+			if er != io.EOF {
+				err = er
+			}
+			break
+		}
+		//没有错误了快使用 callback
+	}
+
 	return nil
 }
\ No newline at end of file