如何使用基本身份验证提供静态文件？

Question

我无法使用github.com/abbot/go-http-auth 对http.FileServer 进行基本身份验证。

package main

import (
    "fmt"
    "log"
    "net/http"

    "github.com/abbot/go-http-auth"
)

func Secret(user, realm string) string {
    users := map[string]string{
        "john": "$1$dlPL2MqE$oQmn16q49SqdmhenQuNgs1", //hello
    }

    if a, ok := users[user]; ok {
        return a
    }
    return ""
}

func doRoot(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "<h1>static file server</h1><p><a href='./static'>folder</p>")
}

func handleFileServer(w http.ResponseWriter, r *http.Request) {
    fs := http.FileServer(http.Dir("static"))
    http.StripPrefix("/static/", fs)
}

func main() {

    authenticator := auth.NewBasicAuthenticator("localhost", Secret)

    // how to secure the FileServer with basic authentication??
    // fs := http.FileServer(http.Dir("static"))
    // http.Handle("/static/", http.StripPrefix("/static/", fs))

    http.HandleFunc("/static/", auth.JustCheck(authenticator, handleFileServer))

    http.HandleFunc("/", auth.JustCheck(authenticator, doRoot))

    log.Println(`Listening... http://localhost:3000
 folder is ./static
 authentication in map users`)
    http.ListenAndServe(":3001", nil)
}

代码：

fs := http.FileServer(http.Dir("static"))
http.Handle("/static/", http.StripPrefix("/static/", fs))

在main() 中工作无需身份验证，但不能与auth.JustCheck 一起使用。我尝试使用handleFileServer 函数，但没有显示任何内容。有什么诀窍？

Answer 1

需要返回StripPrefix的ServeHTTP方法，例如：

func handleFileServer(dir, prefix string) http.HandlerFunc {
    fs := http.FileServer(http.Dir(dir))
    realHandler := http.StripPrefix(prefix, fs).ServeHTTP
    return func(w http.ResponseWriter, req *http.Request) {
        log.Println(req.URL)
        realHandler(w, req)
    }
}

func main()
    //....
    http.HandleFunc("/static/", auth.JustCheck(authenticator, handleFileServer("/tmp", "/static/")))
    //....
}