无法在javascript中读取表单提交上的ResponseHeader值_Javascript_Jquery_Html_Servlet Filters

无法在javascript中读取表单提交上的ResponseHeader值

javascript jquery html

无法在javascript中读取表单提交上的ResponseHeader值,javascript,jquery,html,servlet-filters,Javascript,Jquery,Html,Servlet Filters,当我尝试使用servlet进行用户登录时。我无法读取我在筛选器中添加的响应标头值 Login.html：- <div class="container"> <form class="form-signin" id="loginForm" name="loginForm" action="/JerseyPageRedirection/login/RedirectDemo" method="post" onsubmit="pwd_handler(t

当我尝试使用servlet进行用户登录时。我无法读取我在筛选器中添加的响应标头值

   <div class="container">
    <form class="form-signin" id="loginForm" name="loginForm"
        action="/JerseyPageRedirection/login/RedirectDemo"   method="post" onsubmit="pwd_handler(this);">
        <div class="errmsg text-center"></div>
        <label for="inputEmail">Email address</label> <input type="email"
            id="emailId" class="form-control" name="emailId"
            placeholder="Email address" required autofocus> <br>    <label
            for="inputPassword">Password</label> <input   type="password"
            id="password" class="form-control" name="password"
            placeholder="Password" required> 
            <input type="hidden" name="epassword" value="" /><br>
        <button type="submit" class="btn btn-lg btn-primary btn-    block">Sign in</button>
    </form>
</div>
<script>
    function pwd_handler(form)
    {
            if (form.password.value != '')
            {   
                form.epassword.value =     window.btoa(form.password.value);
                form.password.value = '';
            }
    }
</script>

 <html>
<head>
<meta charset="UTF-8">
<title>main</title>
</head>
<body>
<script>
    console.log(window);
    //Here need to read ResponseHeader 

</script>
<p>Hello main page</p>

LoginServlet：-

       public class RedirectDemo extends HttpServlet {

private static final long serialVersionUID = -8230594616794095241L;

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
    resp.sendRedirect("../main.html");
}
 }

重定向请求和响应头之后：-

现在我想用javascript读取授权头。请有人帮我读取授权头

main.html：-

   <div class="container">
    <form class="form-signin" id="loginForm" name="loginForm"
        action="/JerseyPageRedirection/login/RedirectDemo"   method="post" onsubmit="pwd_handler(this);">
        <div class="errmsg text-center"></div>
        <label for="inputEmail">Email address</label> <input type="email"
            id="emailId" class="form-control" name="emailId"
            placeholder="Email address" required autofocus> <br>    <label
            for="inputPassword">Password</label> <input   type="password"
            id="password" class="form-control" name="password"
            placeholder="Password" required> 
            <input type="hidden" name="epassword" value="" /><br>
        <button type="submit" class="btn btn-lg btn-primary btn-    block">Sign in</button>
    </form>
</div>
<script>
    function pwd_handler(form)
    {
            if (form.password.value != '')
            {   
                form.epassword.value =     window.btoa(form.password.value);
                form.password.value = '';
            }
    }
</script>

 <html>
<head>
<meta charset="UTF-8">
<title>main</title>
</head>
<body>
<script>
    console.log(window);
    //Here need to read ResponseHeader 

</script>
<p>Hello main page</p>


主要的
控制台日志（窗口）；
//这里需要阅读ResponseHeader
你好主页