添加到你的应用程序:

@app.route('/logout')
def logout():
    return ('Logout', 401, {'WWW-Authenticate': 'Basic realm="Login required"'})

此JavaScript必须适用于所有最新版本的浏览器:

//Detect Browser
var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
    // Opera 8.0+ (UA detection to detect Blink/v8-powered Opera)
var isFirefox = typeof InstallTrigger !== 'undefined';   // Firefox 1.0+
var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
    // At least Safari 3+: "[object HTMLElementConstructor]"
var isChrome = !!window.chrome && !isOpera;              // Chrome 1+
var isIE = /*@cc_on!@*/false || !!document.documentMode; // At least IE6
var Host = window.location.host;


//Clear Basic Realm Authentication
if(isIE){
//IE
    document.execCommand("ClearAuthenticationCache");
    window.location = '/';
}
else if(isSafari)
{//Safari. but this works mostly on all browser except chrome
    (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);
        window.location = '/';
        // return !!outcome
    })(/*if present URI does not return 200 OK for GET, set some other 200 OK location here*/)
}
else{
//Firefox,Chrome
    window.location = 'http://log:out@'+Host+'/';
}

我刚刚在Chrome(79)、Firefox(71)和Edge(44)上测试了以下程序，效果良好。它应用上面提到的脚本解决方案。

只需添加一个“注销”链接，点击返回以下html

    <div>You have been logged out. Redirecting to home...</div>    

<script>
    var XHR = new XMLHttpRequest();
    XHR.open("GET", "/Home/MyProtectedPage", true, "no user", "no password");
    XHR.send();

    setTimeout(function () {
        window.location.href = "/";
    }, 3000);
</script>

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*/);

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"); 
      });
  });          

在地址栏中输入chrome://restart, chrome和所有在后台运行的应用程序将重新启动，Auth密码缓存将被清除。