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from django.http import HttpResponseForbidden |
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from django.template import Context, Template |
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from django.conf import settings |
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# We include the template inline since we need to be able to reliably display |
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# this error message, especially for the sake of developers, and there isn't any |
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# other way of making it available independent of what is in the settings file. |
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CSRF_FAILRE_TEMPLATE = """ |
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
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<html lang="en"> |
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<head> |
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<meta http-equiv="content-type" content="text/html; charset=utf-8"> |
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<meta name="robots" content="NONE,NOARCHIVE"> |
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<title>403 Forbidden</title> |
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<style type="text/css"> |
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html * { padding:0; margin:0; } |
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body * { padding:10px 20px; } |
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body * * { padding:0; } |
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body { font:small sans-serif; background:#eee; } |
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body>div { border-bottom:1px solid #ddd; } |
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h1 { font-weight:normal; margin-bottom:.4em; } |
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h1 span { font-size:60%; color:#666; font-weight:normal; } |
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#info { background:#f6f6f6; } |
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#info ul { margin: 0.5em 4em; } |
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#info p { padding-top:10px; } |
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#summary { background: #ffc; } |
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#explanation { background:#eee; border-bottom: 0px none; } |
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</style> |
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</head> |
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<body> |
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<div id="summary"> |
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<h1>Forbidden <span>(403)</span></h1> |
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<p>CSRF verification failed. Request aborted.</p> |
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</div> |
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{% if DEBUG %} |
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<div id="info"> |
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<h2>Help</h2> |
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{% if reason %} |
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<p>Reason given for failure:</p> |
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<pre> |
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{{ reason }} |
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</pre> |
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{% endif %} |
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<p>In general, this can occur when there is a genuine Cross Site Request Forgery, or when |
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<a |
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href='http://docs.djangoproject.com/en/dev/ref/contrib/csrf/#ref-contrib-csrf'>Django's |
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CSRF mechanism</a> has not been used correctly. For POST forms, you need to |
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ensure:</p> |
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<ul> |
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<li>The view function uses <a |
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href='http://docs.djangoproject.com/en/dev/ref/templates/api/#subclassing-context-requestcontext'><code>RequestContext</code></a> |
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for the template, instead of <code>Context</code>.</li> |
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<li>In the template, there is a <code>{% templatetag openblock %} csrf_token |
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{% templatetag closeblock %}</code> template tag inside each POST form that |
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targets an internal URL.</li> |
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<li>If you are not using <code>CsrfViewMiddleware</code>, then you must use |
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<code>csrf_protect</code> on any views that use the <code>csrf_token</code> |
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template tag, as well as those that accept the POST data.</li> |
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</ul> |
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<p>You're seeing the help section of this page because you have <code>DEBUG = |
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True</code> in your Django settings file. Change that to <code>False</code>, |
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and only the initial error message will be displayed. </p> |
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<p>You can customize this page using the CSRF_FAILURE_VIEW setting.</p> |
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</div> |
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{% else %} |
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<div id="explanation"> |
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<p><small>More information is available with DEBUG=True.</small></p> |
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</div> |
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{% endif %} |
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</body> |
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</html> |
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""" |
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def csrf_failure(request, reason=""): |
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""" |
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Default view used when request fails CSRF protection |
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""" |
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t = Template(CSRF_FAILRE_TEMPLATE) |
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c = Context({'DEBUG': settings.DEBUG, |
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'reason': reason}) |
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return HttpResponseForbidden(t.render(c), mimetype='text/html') |