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    <p>The cookie is there for AJAX support. Quoting the <a href="http://docs.djangoproject.com/en/1.7/ref/contrib/csrf/#ajax" rel="nofollow noreferrer">Django docs</a>:</p> <blockquote> <p>While the above method can be used for AJAX POST requests, it has some inconveniences: you have to remember to pass the CSRF token in as POST data with every POST request. For this reason, there is an alternative method: on each XMLHttpRequest, set a custom X-CSRFToken header to the value of the CSRF token. This is often easier, because many javascript frameworks provide hooks that allow headers to be set on every request. In jQuery, you can use the ajaxSend event as follows:</p> </blockquote> <pre><code>$('html').ajaxSend(function(event, xhr, settings) { function getCookie(name) { var cookieValue = null; if (document.cookie &amp;&amp; document.cookie != '') { var cookies = document.cookie.split(';'); for (var i = 0; i &lt; cookies.length; i++) { var cookie = jQuery.trim(cookies[i]); // Does this cookie string begin with the name we want? if (cookie.substring(0, name.length + 1) == (name + '=')) { cookieValue = decodeURIComponent(cookie.substring(name.length + 1)); break; } } } return cookieValue; } if (!(/^http:.*/.test(settings.url) || /^https:.*/.test(settings.url))) { // Only send the token to relative URLs i.e. locally. xhr.setRequestHeader("X-CSRFToken", getCookie('csrftoken')); } }); </code></pre> <blockquote> <p>Adding this to a javascript file that is included on your site will ensure that AJAX POST requests that are made via jQuery will not be caught by the CSRF protection.</p> </blockquote>
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    1. POdjango: csrftoken COOKIE vs. csrfmiddlewaretoken HTML Form value
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    1. USMike DeSimone
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    1. COMike, thanks for the answer. I'm keeping the question open for a while to make sure that the only purpose of the csrf cookie is so that when submitting via Ajax, the header value can be copied from the cookie. Maybe there are additional, security related, reasons. Thanks.
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    2. COI just remember this because AJAX requests didn't require CSRF until 1.2.5, and when we upgraded to 1.2.5 my AJAX code started breaking. It was a fun one to hunt down; it's not often that I have to break out `curl` to debug AJAX.
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