105 lines
3.7 KiB
Python
105 lines
3.7 KiB
Python
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_FAILURE_TEMPLATE = """
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<!DOCTYPE html>
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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, #summary 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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{% if no_referer %}
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<p>You are seeing this message because this HTTPS site requires a 'Referer
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header' to be sent by your Web browser, but none was sent. This header is
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required for security reasons, to ensure that your browser is not being
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hijacked by third parties.</p>
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<p>If you have configured your browser to disable 'Referer' headers, please
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re-enable them, at least for this site, or for HTTPS connections, or for
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'same-origin' requests.</p>
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{% endif %}
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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>Your browser is accepting cookies.</li>
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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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from django.middleware.csrf import REASON_NO_REFERER
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t = Template(CSRF_FAILURE_TEMPLATE)
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c = Context({'DEBUG': settings.DEBUG,
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'reason': reason,
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'no_referer': reason == REASON_NO_REFERER
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})
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return HttpResponseForbidden(t.render(c), content_type='text/html')
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