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运行Django Step by Step第二节的例子，出现如下错误，解决方法是：修改settings.py，添加‘django.middleware.csrf.CsrfResponseMiddleware’，最后结构如下：

MIDDLEWARE_CLASSES = (
‘django.middleware.common.CommonMiddleware’,
‘django.contrib.sessions.middleware.SessionMiddleware’,
‘django.contrib.auth.middleware.AuthenticationMiddleware’,
‘django.middleware.csrf.CsrfViewMiddleware’,
‘django.middleware.csrf.CsrfResponseMiddleware’,
)

403 Forbidden

CSRF verification failed. Request aborted.

Help

Reason 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:

• The view function uses RequestContext for the template, instead of Context.
• 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.

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