fix(gateway): 修复文件上传功能中的数据写入和头部设置问题

service/gateway/gateway_http_service.go

@@ -41,10 +41,16 @@ func UploadByTask(ctx context.Context, _ *entity.AsynchTask, data []byte, fileEx
 	if err != nil {
 		return "", err
 	}
-	if _, err = part.Write(data); err != nil {
+	if _, err := part.Write(data); err != nil {
 		return "", err
 	}
+	contentType := writer.FormDataContentType()
+	if err := writer.Close(); err != nil {
+		return "", err
+	}
+
 	headers := util.ForwardHeaders(ctx)
+	headers["Content-Type"] = contentType
 	fullURL := "oss/file/uploadFile"
 	g.Log().Infof(ctx, "[OSS] upload start url=%s filename=%s size=%d", fullURL, filename, len(data))