禁止訪問 (403)CSRF驗證失敗. 相應中斷.HelpReason given for failure:    CSRF token missing or incorrect.    In general, this can occur when there is a genuine Cross Site Request Forgery, or when Django's CSRF mechanism has not been used correctly. 
For POST forms, you need to ensure:    Your browser is accepting cookies.    The view function passes a request to the template's render method.    In the template, there is a {% csrf_token %} template tag inside each POST form that targets an internal URL.    If you are not using CsrfViewMiddleware, then you must use csrf_PRotect on any views that use the csrf_token template tag, as well 
as those that accept the POST data.You're seeing the help section of this page because you have DEBUG = True in your Django settings file. Change that to False, and 
only the initial error message will be displayed.You can customize this page using the CSRF_FAILURE_VIEW setting.

{% extends "base.html" %}{% block title %}    hello{% endblock %}{% block content %}    <div class="container">      <form class="form-signin" action="/login_webmail/" method='post'>{% csrf_token %}        <h2 class="form-signin-heading">Please sign in</h2>        <label class="sr-only" for="inputUserName">Email address/UserName</label>        <input type="text" autofocus="" required="" placeholder="Email address/UserName" class="form-control" id="inputUserName" name="inputUserName">        <label class="sr-only" for="inputPassWord">Password</label>        <input type="password" required="" placeholder="Password" class="form-control" id="inputPassword">        <div class="checkbox">          <label>            <input type="checkbox" value="remember-me"> Remember me          </label>        </div>        <button type="submit" class="btn btn-lg btn-primary btn-block">Sign in</button>      </form>    </div> <!-- /container -->{% endblock %}

from django.http import HttpResponseimport datetimefrom django.shortcuts import render_to_response#postfrom django.template import RequestContext#postdef webindex(request):    return render_to_response('index.html',context_instance=RequestContext(request))    

def login_webmail(request):    if 'inputUserName' in request.POST:        message = request.POST['inputUserName']    else:        message = "Not inputUserName"    return render_to_response('test_post.html',{'test_post_name':message})