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