dongxi3859 2017-06-03 18:09
浏览 272
已采纳

Golang替代python / flask send_from_directory()

I have this image urls:

/book/cover/Computer_Science.png

but the location of the image actually exists under

/uploads/img/Computer_Science.png

I'm using Gin framework. Is there any command like Flask's send_from_directory() in Gin or in in-built Golang functions?

If not could you share a snippet of how to do it?

Thanks!

  • 写回答

1条回答 默认 最新

  • doubi7739 2017-06-03 23:33
    关注

    Use gin's Context.File to serve file content. This method internally calls http.ServeFile builtin function. The code snippets will be:

    import "path/filepath"
    
    
    // ...
    router := gin.Default()
    // ... 
    
    router.GET("/book/cover/:filename", func(c *gin.Context) {
        rootDir := "/uploads/img/"
        name := c.Param("filename")
        filePath, err :=  filepath.Abs(rootDir + name)
        if err != nil {
            c.AbortWithStatus(404)
        }
    
        //Only allow access to file/directory under rootDir
        //The following code is for ilustration since HasPrefix is deprecated.
        //Replace with correct one when https://github.com/golang/dep/issues/296 fixed
        if !filepath.HasPrefix(filePath, rootDir) {
            c.AbortWithStatus(404)
        }
    
        c.File(filePath)
    })
    

    Update

    As pointed by zerkms, the path name must be sanitized before passing it Context.File. Simple sanitizer is added in the snippet. Please adapt to your needs.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 关于模型训练的一个问题
  • ¥15 装了几千台服务器从来没遇到这种问题,哎看下哪位帮我解决吧
  • ¥15 单片机程序上的困难问题
  • ¥15 请教某软件缓存Ts文件破解合并mp4的方法
  • ¥15 求小游戏炸弹人中关于敌人的C++代码
  • ¥15 拿到这个服务器最高权限有偿
  • ¥50 来个抓app跳转支付宝转链接的
  • ¥15 remotes安装提示没有description文件
  • ¥15 AttributeError: 'NoneType' object has no attribute 'drop_duplicates'报错
  • ¥15 以下代码,运行结果报错