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    <title>Nine Nines: Cowboy 2.1</title>

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<header>
	<h1 class="lined-header"><span>Cowboy 2.1</span></h1>
	<p class="date">
		<span class="year">2017</span>
		<span class="day-month">09 Nov</span>
	</p>
</header>

<p>Cowboy <code>2.1.0</code> has been released!</p>
<p>This release focused on adding features that were temporarily removed during the 2.0 release process:</p>
<ul><li>The client TLS certificate can now be obtained.
</li>
<li>The 100 Continue response is now sent automatically again when necessary.
</li>
<li>NEW: It is now possible to send informational responses (1XX) directly from user code via the <code>cowboy_req:inform/2,3</code> functions.
</li>
<li>NEW: <code>cowboy_rest</code> handlers can now switch to any other type of handler from almost any callback. This is especially useful to switch to <code>cowboy_loop</code> to stream the request or response body.
</li>
</ul>
<p>A number of bugs have also been fixed. A more complete list of changes can be found in the migration guide: <a href="https://ninenines.eu/docs/en/cowboy/2.1/guide/migrating_from_2.0/">Migrating from Cowboy 2.0 to 2.1</a>.</p>
<p>The next release will see the added support for trailers, which are necessary for implementing the gRPC protocol.</p>
<p>You can donate to this project via <a href="https://github.com/sponsors/essen">GitHub Sponsors</a> because I need to eat snacks when I write code. Thanks in advance!</p>
<p>As usual, any feedback is appreciated, and any issues should be reported by opening a ticket. Thanks!</p>


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<h3>Feedback</h3>
<p>Feel free to <a href="mailto:[email protected]">email us</a>
if you found any mistake or need clarification on any of the
articles.</p>

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