阻止访问的文件夹中有golang服务器

Question

我在golang已经在服务器谁处理这样的文件夹路径：

fs := http.FileServer(http.Dir("./assets")) 
http.Handle("/Images/", fs) 
http.ListenAndServe(":8000", nil) 

但此文件夹中有士兵的图像，它不应该是可能的访问文件。那么我怎样才能保护图像访问并阻止任何人访问文件夹的内容。

一样，例如：

Answer 1

如果要阻止使用http软件包的目录，也许这将是对你有用：

https://groups.google.com/forum/#!topic/golang-nuts/bStLPdIVM6w

package main 

import (
    "net/http" 
    "os" 
) 

type justFilesFilesystem struct { 
    fs http.FileSystem 
} 

func (fs justFilesFilesystem) Open(name string) (http.File, error) { 
    f, err := fs.fs.Open(name) 
    if err != nil { 
     return nil, err 
    } 
    return neuteredReaddirFile{f}, nil 
} 

type neuteredReaddirFile struct { 
    http.File 
} 

func (f neuteredReaddirFile) Readdir(count int) ([]os.FileInfo, error) { 
    return nil, nil 
} 

func main() { 
    fs := justFilesFilesystem{http.Dir("/tmp/")} 
    http.ListenAndServe(":8080", http.FileServer(fs)) 
} 

Answer 2

FileServer（）的一个小包装解决了你的问题，现在你必须添加一些逻辑来进行授权，它看起来像你有独特的名字，这很好，所以我只是为你创建一个名称映射的图像名称，现在你可以添加一些更像key/store（memcached，redis）的动态。等等），希望你能按照意见

package main 

import (
    "log" 
    "net/http" 
    "strings" 
) 

// put the allowed hashs or keys here 
// you may consider put them in a key/value store 
// 
var allowedImages = map[string]bool{ 
    "key-abc.jpg": true, 
    "key-123.jpg": true, 
} 

func main() { 

    http.Handle("/Images/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { 

     // here we can do any kind of checking, in this case we'll just split the url and 
     // check if the image name is in the allowedImages map, we can check in a DB or something 
     // 
     parts := strings.Split(r.URL.Path, "/") 
     imgName := parts[len(parts)-1] 

     if _, contains := allowedImages[imgName]; !contains { // if the map contains the image name 

      log.Printf("Not found image: %q path: %s\n", imgName, r.URL.Path) 

      // if the image is not found we write a 404 
      // 
      // Bonus: we don't list the directory, so nobody can know what's inside :) 
      // 
      http.NotFound(w, r) 
      return 
     } 

     log.Printf("Serving allowed image: %q\n", imgName) 

     fileServer := http.StripPrefix("/Images/", http.FileServer(http.Dir("./assets"))) 

     fileServer.ServeHTTP(w, r) // StripPrefix() and FileServer() return a Handler that implements ServerHTTP() 
    })) 

    http.ListenAndServe(":8000", nil) 
} 

https://play.golang.org/p/ehrd_AWXim