Question

我有一个登录页面（login.html），它使用Javascript在后端调用golang服务。成功登录后，应将用户带到仪表板页面（dashboard.html）。相反，仪表板页面会在登录页面的中间打开，如下所示：

相关代码是：

func userhandler(w http.ResponseWriter, r *http.Request, subcommand string) {
...

// If the credentials are valid, go to the Dashboard page
if validateLoginCredentials([]byte(loginUsername), []byte(loginPassword)) != -1 {

http.Redirect(w, r, "/dashboard.html", 302) //<<<<<<<<<The Redirect is here

}
...
}

func webhandler(w http.ResponseWriter, r *http.Request) { ...
// Service the API
if strings.HasPrefix(r.URL.Path, "/xyzzy/") {
    urlparts := strings.SplitN(r.URL.Path, "/", 5) ...
        switch urlparts[3] {
            case "user":
                userhandler(w, r, urlparts[4]) ...
        }
    }
} else { // Serve the static pages
    http.FileServer(http.Dir(".")).ServeHTTP(w, r)
}

... 
}

func main {
...
http.HandleFunc("/", webhandler) ...
err_https := http.ListenAndServeTLS(":3001", "./xyzzy.crt", "./xyzzy.key", nil)
... 
}

如果作为测试，我将重定向放到它为静态页面提供服务的位置（所有静态页面将重定向到仪表板页面），它看起来像是有效的。但是，在处理用户api函数的代码中，比如login，我得到了这种行为。

HTML代码段：

<body>
    <div class="logintopspacer" id="logintopspacerid"></div>
    <div class="loginlogo" id="loginlogoid"><img src="img/pixmover1.png" alt="PixMover" width="270"></div>
    <div class="logintitlecontainer" id="logintitlecontainerid">
        <div class="logintitle" id="logintitleid">User Login</div>
    </div>
    <div class="loginmidspacer" id="loginmidspacerid"></div>
    <div class="logincredentialscontainer" id="logincredentialscontainerid">
        <div class="logincredentialsspacer"></div>
        <div class="logincredentialtitle">Username/Email:</div>
        <div class="logincredentialentry"><input type="text" name="pixun" id="pixunid" size="25"></div>
        <div class="logincredentialsspacer"></div>

        <div class="logincredentialsspacer"></div>
        <div class="logincredentialtitle">Password:</div>
        <div class="logincredentialentry"><input type="password" name="pixpw" id="pixpwid" size="25"></div>
        <div class="logincredentialsspacer"></div>
    </div>
    <div class="loginbuttoncontainer" id="loginbuttoncontainerid">
        <div class="loginbutton" id="loginbuttonid" onmousedown="buttonPressed();" onmouseup="submitForm();" onmouseout="buttonReleased();" >Login</div>
    </div>
    <div class="loginerrormessage" id="loginerrormessageid"></div>
    <div class="loginbottomspacer" id="loginbottomspacerid"></div>

    <div class="pagefooter" id="pagefooterid">
        Copyright &copy; XYZZY, Inc. 2016
    </div>

</body>

使用Javascript：

function submitForm()
{
    document.getElementById("loginbuttonid").className = "loginbutton";
    pixlogin();
}

function pixlogin()
{
    var xhttp = new XMLHttpRequest();

    xhttp.onreadystatechange = function()
    {
        if (xhttp.readyState == 4 && xhttp.status == 200)
        {
            document.getElementById("loginerrormessageid").innerHTML = xhttp.responseText;
        }
    };

    xhttp.open("POST", "pixmover/1_0_0/user/login", true);
    xhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhttp.send("username=" + document.getElementById("pixunid").value + "&password=" + document.getElementById("pixpwid").value);
}

Answer 1

我相信这是来自你的

if (xhttp.readyState == 4 && xhttp.status == 200)
{
    document.getElementById("loginerrormessageid").innerHTML = xhttp.responseText;
}

当重定向返回时，您将获得整个页面，并且只是将其加载到错误消息中，因为没有条件。你可能想要做一些事情，比如

if (isAuthenticated) {
    location.href = "/"; // whatever page to redirect to
}

Golang http重定向奇怪的行为

1 个答案: