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<a href="#browser-enhancements">Browser enhancements</a>
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<a href="#browser-based-put-delete-etc">Browser based PUT, DELETE, etc...</a>
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<a href="#http-header-based-method-overriding">HTTP header based method overriding</a>
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<h1 id="browser-enhancements">Browser enhancements</h1>
<blockquote>
<p>"There are two noncontroversial uses for overloaded POST. The first is to <em>simulate</em> HTTP's uniform interface for clients like web browsers that don't support PUT or DELETE"</p>
<p>— <a href="http://www.amazon.com/Restful-Web-Services-Leonard-Richardson/dp/0596529260">RESTful Web Services</a>, Leonard Richardson & Sam Ruby.</p>
</blockquote>
<h2 id="browser-based-put-delete-etc">Browser based PUT, DELETE, etc...</h2>
<p>REST framework supports browser-based <code>PUT</code>, <code>DELETE</code> and other methods, by
overloading <code>POST</code> requests using a hidden form field.</p>
<p>Note that this is the same strategy as is used in <a href="http://guides.rubyonrails.org/form_helpers.html#how-do-forms-with-put-or-delete-methods-work">Ruby on Rails</a>.</p>
<p>For example, given the following form:</p>
<pre><code><form action="/news-items/5" method="POST">
<input type="hidden" name="_method" value="DELETE">
</form>
</code></pre>
<p><code>request.method</code> would return <code>"DELETE"</code>.</p>
<h2 id="http-header-based-method-overriding">HTTP header based method overriding</h2>
<p>REST framework also supports method overriding via the semi-standard <code>X-HTTP-Method-Override</code> header. This can be useful if you are working with non-form content such as JSON and are working with an older web server and/or hosting provider that doesn't recognise particular HTTP methods such as <code>PATCH</code>. For example <a href="https://forums.aws.amazon.com/thread.jspa?messageID=400724">Amazon Web Services ELB</a>.</p>
<p>To use it, make a <code>POST</code> request, setting the <code>X-HTTP-Method-Override</code> header.</p>
<p>For example, making a <code>PATCH</code> request via <code>POST</code> in jQuery:</p>
<pre><code>$.ajax({
url: '/myresource/',
method: 'POST',
headers: {'X-HTTP-Method-Override': 'PATCH'},
...
});
</code></pre>
<h2 id="browser-based-submission-of-non-form-content">Browser based submission of non-form content</h2>
<p>Browser-based submission of content types other than form are supported by
using form fields named <code>_content</code> and <code>_content_type</code>:</p>
<p>For example, given the following form:</p>
<pre><code><form action="/news-items/5" method="PUT">
<input type="hidden" name="_content_type" value="application/json">
<input name="_content" value="{'count': 1}">
</form>
</code></pre>
<p><code>request.content_type</code> would return <code>"application/json"</code>, and
<code>request.stream</code> would return <code>"{'count': 1}"</code></p>
<h2 id="url-based-accept-headers">URL based accept headers</h2>
<p>REST framework can take <code>?accept=application/json</code> style URL parameters,
which allow the <code>Accept</code> header to be overridden.</p>
<p>This can be useful for testing the API from a web browser, where you don't
have any control over what is sent in the <code>Accept</code> header.</p>
<h2 id="url-based-format-suffixes">URL based format suffixes</h2>
<p>REST framework can take <code>?format=json</code> style URL parameters, which can be a
useful shortcut for determining which content type should be returned from
the view.</p>
<p>This is a more concise than using the <code>accept</code> override, but it also gives
you less control. (For example you can't specify any media type parameters)</p>
<h2 id="doesnt-html5-support-put-and-delete-forms">Doesn't HTML5 support PUT and DELETE forms?</h2>
<p>Nope. It was at one point intended to support <code>PUT</code> and <code>DELETE</code> forms, but
was later <a href="http://www.w3.org/TR/html5-diff/#changes-2010-06-24">dropped from the spec</a>. There remains
<a href="http://amundsen.com/examples/put-delete-forms/">ongoing discussion</a> about adding support for <code>PUT</code> and <code>DELETE</code>,
as well as how to support content types other than form-encoded data.</p>
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