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<h1 class="lined-header"><span>cowboy_req:inform(3)</span></h1>

<h2 id="_name">Name</h2>
<p>cowboy_req:inform - Send an informational response</p>
<h2 id="_description">Description</h2>
<div class="listingblock"><div class="content"><!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><b><font color="#000000">inform</font></b>(<font color="#009900">Status</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
    <font color="#990000">-&gt;</font> <b><font color="#000000">inform</font></b>(<font color="#009900">StatusCode</font>, #{}, <font color="#009900">Req</font>)

<b><font color="#000000">inform</font></b>(<font color="#009900">Status</font>, <font color="#009900">Headers</font>, <font color="#009900">Req</font> <font color="#990000">::</font> <b><font color="#000000">cowboy_req:req</font></b>())
    <font color="#990000">-&gt;</font> <font color="#FF6600">ok</font>

<font color="#009900">Status</font>  <font color="#990000">::</font> <b><font color="#000000">cowboy:http_status</font></b>()
<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">cowboy:http_headers</font></b>()</tt></pre>
</div></div>
<p>Send an informational response.</p>
<p>Informational responses use a status code between 100 and 199. They cannot include a body. This function will not use any of the previously set headers. All headers to be sent must be given directly.</p>
<p>Any number of informational responses can be sent as long as they are sent before the proper response. Attempting to use this function after sending a normal response will result in an error.</p>
<p>The header names must be given as lowercase binary strings. While header names are case insensitive, Cowboy requires them to be given as lowercase to function properly.</p>
<h2 id="_arguments">Arguments</h2>
<dl><dt>Status</dt>
<dd><p>The status code for the response.</p>
</dd>
<dt>Headers</dt>
<dd><p>The response headers.</p>
<p>Header names must be given as lowercase binary strings.</p>
</dd>
<dt>Req</dt>
<dd><p>The Req object.</p>
</dd>
</dl>
<h2 id="_return_value">Return value</h2>
<p>The atom <code>ok</code> is always returned. It can be safely ignored.</p>
<h2 id="_changelog">Changelog</h2>
<ul><li><strong>2.1</strong>: Function introduced.
</li>
</ul>
<h2 id="_examples">Examples</h2>
<div class="listingblock"><div class="title">Send an informational response</div>
<div class="content"><!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:inform</font></b>(<font color="#993399">102</font>, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
</div></div>
<div class="listingblock"><div class="title">Send an informational response with headers</div>
<div class="content"><!-- Generator: GNU source-highlight 3.1.9
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><font color="#009900">Req</font> <font color="#990000">=</font> <b><font color="#000000">cowboy_req:inform</font></b>(<font color="#993399">103</font>, #{
    <font color="#990000">&lt;&lt;</font><font color="#FF0000">"link"</font><font color="#990000">&gt;&gt;</font> <font color="#990000">=&gt;</font> <font color="#990000">&lt;&lt;</font><font color="#FF0000">"&lt;/style.css&gt;; rel=preload; as=style, "</font>
        <font color="#FF0000">"&lt;/script.js&gt;; rel=preload; as=script"</font><font color="#990000">&gt;&gt;</font>
}, <font color="#009900">Req0</font>)<font color="#990000">.</font></tt></pre>
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<h2 id="_see_also">See also</h2>
<p><a href="../cowboy_req">cowboy_req(3)</a>, <a href="../cowboy_req.reply">cowboy_req:reply(3)</a>, <a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a>, <a href="../cowboy_req.push">cowboy_req:push(3)</a></p>






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<h3>
	Cowboy
	2.12
	Function Reference
	
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		<li><a href="/docs/en/cowboy/2.12/guide">User Guide</a></li>
	
	
		<li><a href="/docs/en/cowboy/2.12/manual">Function Reference</a></li>
	
	
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