如何注销用户从网站使用基本身份验证?

是否有可能注销用户从一个网站，如果他是使用基本身份验证?

杀死会话是不够的，因为一旦用户通过身份验证，每个请求都包含登录信息，因此用户下次使用相同的凭据访问站点时将自动登录。

目前唯一的解决方案是关闭浏览器，但从可用性的角度来看，这是不可接受的。

当前回答

我为现代Chrome版本更新了mthoring的解决方案:

function logout(secUrl, redirUrl) {
    if (bowser.msie) {
        document.execCommand('ClearAuthenticationCache', 'false');
    } else if (bowser.gecko) {
        $.ajax({
            async: false,
            url: secUrl,
            type: 'GET',
            username: 'logout'
        });
    } else if (bowser.webkit || bowser.chrome) {
        var xmlhttp = new XMLHttpRequest();
        xmlhttp.open(\"GET\", secUrl, true);
        xmlhttp.setRequestHeader(\"Authorization\", \"Basic logout\");\
        xmlhttp.send();
    } else {
// http://stackoverflow.com/questions/5957822/how-to-clear-basic-authentication-details-in-chrome
        redirUrl = url.replace('http://', 'http://' + new Date().getTime() + '@');
    }
    setTimeout(function () {
        window.location.href = redirUrl;
    }, 200);
}

2017-05-15 23:15:31

其他回答

你可以完全用JavaScript完成:

IE有(很长一段时间)用于清除基本身份验证缓存的标准API:

document.execCommand("ClearAuthenticationCache")

当它工作时应该返回true。返回false，未定义或爆炸在其他浏览器。

新的浏览器(截至2012年12月:Chrome, FireFox, Safari)有“神奇”的行为。如果他们看到一个成功的基本身份验证请求与任何虚假的其他用户名(假设注销)，他们会清除凭据缓存，并可能为新的虚假用户名设置凭据缓存，您需要确保这不是一个用于查看内容的有效用户名。

基本的例子是:

var p = window.location.protocol + '//'
// current location must return 200 OK for this GET
window.location = window.location.href.replace(p, p + 'logout:password@')

实现上述操作的一种“异步”方式是使用注销用户名进行AJAX调用。例子:

(function(safeLocation){
    var outcome, u, m = "You should be logged out now.";
    // IE has a simple solution for it - API:
    try { outcome = document.execCommand("ClearAuthenticationCache") }catch(e){}
    // Other browsers need a larger solution - AJAX call with special user name - 'logout'.
    if (!outcome) {
        // Let's create an xmlhttp object
        outcome = (function(x){
            if (x) {
                // the reason we use "random" value for password is 
                // that browsers cache requests. changing
                // password effectively behaves like cache-busing.
                x.open("HEAD", safeLocation || location.href, true, "logout", (new Date()).getTime().toString())
                x.send("")
                // x.abort()
                return 1 // this is **speculative** "We are done." 
            } else {
                return
            }
        })(window.XMLHttpRequest ? new window.XMLHttpRequest() : ( window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : u ))
    }
    if (!outcome) {
        m = "Your browser is too old or too weird to support log out functionality. Close all windows and restart the browser."
    }
    alert(m)
    // return !!outcome
})(/*if present URI does not return 200 OK for GET, set some other 200 OK location here*/)

你也可以把它做成书签:

javascript:(function (c) {
  var a, b = "You should be logged out now.";
  try {
    a = document.execCommand("ClearAuthenticationCache")
  } catch (d) {
  }
  a || ((a = window.XMLHttpRequest ? new window.XMLHttpRequest : window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : void 0) ? (a.open("HEAD", c || location.href, !0, "logout", (new Date).getTime().toString()), a.send(""), a = 1) : a = void 0);
  a || (b = "Your browser is too old or too weird to support log out functionality. Close all windows and restart the browser.");
  alert(b)
})(/*pass safeLocation here if you need*/);

2013-01-15 01:46:20

function logout() {
  var userAgent = navigator.userAgent.toLowerCase();

  if (userAgent.indexOf("msie") != -1) {
    document.execCommand("ClearAuthenticationCache", false);
  }

  xhr_objectCarte = null;

  if(window.XMLHttpRequest)
    xhr_object = new XMLHttpRequest();
  else if(window.ActiveXObject)
    xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
  else
    alert ("Your browser doesn't support XMLHTTPREQUEST");

  xhr_object.open ('GET', 'http://yourserver.com/rep/index.php', false, 'username', 'password');
  xhr_object.send ("");
  xhr_object = null;

  document.location = 'http://yourserver.com'; 
  return false;
}

2015-02-06 15:37:43

这适用于IE/Netscape/Chrome浏览器:

      function ClearAuthentication(LogOffPage) 
  {
     var IsInternetExplorer = false;    

     try
     {
         var agt=navigator.userAgent.toLowerCase();
         if (agt.indexOf("msie") != -1) { IsInternetExplorer = true; }
     }
     catch(e)
     {
         IsInternetExplorer = false;    
     };

     if (IsInternetExplorer) 
     {
        // Logoff Internet Explorer
        document.execCommand("ClearAuthenticationCache");
        window.location = LogOffPage;
     }
     else 
     {
        // Logoff every other browsers
    $.ajax({
         username: 'unknown',
         password: 'WrongPassword',
             url: './cgi-bin/PrimoCgi',
         type: 'GET',
         beforeSend: function(xhr)
                 {
            xhr.setRequestHeader("Authorization", "Basic AAAAAAAAAAAAAAAAAAA=");
         },

                 error: function(err)
                 {
                    window.location = LogOffPage;
             }
    });
     }
  }


  $(document).ready(function () 
  {
      $('#Btn1').click(function () 
      {
         // Call Clear Authentication 
         ClearAuthentication("force_logout.html"); 
      });
  });

2013-05-20 08:52:50

以下功能在Firefox 40、Chrome 44、Opera 31和IE 11上均已确认有效。 Bowser用于浏览器检测，也使用jQuery。 —“secUrl”为密码保护区域的url，用户可以从该url退出。 —“redirUrl”为非密码保护区域的url(注销成功页面)。你可能想增加重定向计时器(目前是200ms)。

2015-09-01 07:24:57

正如其他人所说，我们需要获得相同的URL并发送一个错误(例如401:StatusUnauthorized之类的)，仅此而已。

我使用Get方法让它知道我需要登出，

下面是一个使用golang进行写作的完整示例。

package main

import (
    "crypto/subtle"
    "fmt"
    "log"
    "net/http"
)

func BasicAuth(username, password, realm string, handlerFunc http.HandlerFunc) http.HandlerFunc {

    return func(w http.ResponseWriter, r *http.Request) {
        queryMap := r.URL.Query()
        if _, ok := queryMap["logout"]; ok { // localhost:8080/public/?logout
            w.WriteHeader(http.StatusUnauthorized) // 401
            _, _ = w.Write([]byte("Success logout!\n"))
            return
        }

        user, pass, ok := r.BasicAuth()

        if !ok ||
            subtle.ConstantTimeCompare([]byte(user), []byte(username)) != 1 ||
            subtle.ConstantTimeCompare([]byte(pass), []byte(password)) != 1 {
            // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/WWW-Authenticate
            w.Header().Set("WWW-Authenticate", `Basic realm="`+realm+`", charset="UTF-8"`)
            w.WriteHeader(http.StatusUnauthorized)
            _, _ = w.Write([]byte("Unauthorised.\n"))
            return
        }

        handlerFunc(w, r)
    }
}

type UserInfo struct {
    name string
    psw  string
}

func main() {

    portNumber := "8080"
    guest := UserInfo{"guest", "123"}

    // localhost:8080/public/  -> ./public/everyone
    publicHandler := http.StripPrefix(
        "/public/", http.FileServer(http.Dir("./public/everyone")),
    )

    publicHandlerFunc := func(w http.ResponseWriter, r *http.Request) {
        switch r.Method {
        case http.MethodGet:
            publicHandler.ServeHTTP(w, r)
        /*
            case http.MethodPost:
            case http.MethodPut:
            case http.MethodDelete:
        */
        default:
            return
        }
    }

    http.HandleFunc("/public/",
        BasicAuth(guest.name, guest.psw, "Please enter your username and password for this site",
            publicHandlerFunc),
    )

    log.Fatal(http.ListenAndServe(fmt.Sprintf(":%s", portNumber), nil))
}

当您已经登出时，您需要刷新(F5)页面。否则，您可能会看到旧内容。

2021-03-16 02:11:25

如何注销用户从网站使用基本身份验证?

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