fix: correct argument passing in DoDownloadRequest for MIME type retrieval

service/file_decoder.go

@@ -19,7 +19,7 @@ import (
 // GetFileTypeFromUrl 获取文件类型，返回 mime type， 例如 image/jpeg, image/png, image/gif, image/bmp, image/tiff, application/pdf
 // 如果获取失败，返回 application/octet-stream
 func GetFileTypeFromUrl(c *gin.Context, url string, reason ...string) (string, error) {
-	response, err := DoDownloadRequest(url, reason...)
+	response, err := DoDownloadRequest(url, []string{"get_mime_type", strings.Join(reason, ", ")}...)
 	if err != nil {
 		common.SysLog(fmt.Sprintf("fail to get file type from url: %s, error: %s", url, err.Error()))
 		return "", err