golang+gin 实现文件下载GET接口api

• 1.api接口格式

  http://ip:port/downloadFiles

• 2.接口router

  http url: http://ip:port/downloadFiles?filedir=attachment/resource&fileName=name.jpg

  param: filedir: 文件路径

  ​ fileName:文件名称

  router.GET("/downloadFiles",service.DownloadFileService)
  

• 3.service

  //TODO Test资源文件下载
  func DownloadFileService(c *gin.Context) {
    fileDir := c.Query("fileDir")
    fileName := c.Query("fileName")
    //打开文件
    _, errByOpenFile := os.Open(fileDir + "/" + fileName)
    //非空处理
    if common.IsEmpty(fileDir) || common.IsEmpty(fileName) || errByOpenFile != nil {
        /*c.JSON(http.StatusOK, gin.H{
            "success": false,
            "message": "失败",
            "error":   "资源不存在",
        })*/
        c.Redirect(http.StatusFound, "/404")
        return
    }
    c.Header("Content-Type", "application/octet-stream")
    c.Header("Content-Disposition", "attachment; filename="+fileName)
    c.Header("Content-Transfer-Encoding", "binary")
    c.File(fileDir + "/" + fileName)
    return
  }