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<h1 class="lined-header"><span>cowboy_req:set_resp_headers(3)</span></h1>
<div class="sect1">
<h2 id="_name">Name</h2>
<div class="sectionbody">
<div class="paragraph"><p>cowboy_req:set_resp_headers - Set several response headers</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">Description</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><span style="font-weight: bold"><span style="color: #000000">set_resp_headers</span></span>(<span style="color: #009900">Headers</span>, <span style="color: #009900">Req</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:req</span></span>())
<span style="color: #990000">-></span> <span style="color: #009900">Req</span>
<span style="color: #009900">Headers</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">cowboy:http_headers</span></span>()</tt></pre></div></div>
<div class="paragraph"><p>Set several headers to be sent with the response.</p></div>
<div class="paragraph"><p>The header name must be given as a lowercase binary string.
While header names are case insensitive, Cowboy requires them
to be given as lowercase to function properly.</p></div>
<div class="paragraph"><p>Cowboy does not allow duplicate header names. Headers set
by this function may be overwritten by those set from the
reply functions. Likewise, headers set by this function may
overwrite headers that were set previously.</p></div>
<div class="paragraph"><p>Use <a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a>
instead of this function to set cookies.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_arguments">Arguments</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
Headers
</dt>
<dd>
<p>
Headers as a map with keys being lowercase binary strings,
and values as binary strings.
</p>
</dd>
<dt class="hdlist1">
Req
</dt>
<dd>
<p>
The Req object.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_return_value">Return value</h2>
<div class="sectionbody">
<div class="paragraph"><p>A new Req object is returned.</p></div>
<div class="paragraph"><p>The returned Req object must be used from that point onward,
otherwise the headers will not be sent in the response.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_changelog">Changelog</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
<strong>2.0</strong>: Function introduced.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">Examples</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="title">Set several response headers</div>
<div class="content"><!-- Generator: GNU source-highlight
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><span style="color: #009900">Req</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">cowboy_req:set_resp_headers</span></span>(#{
<span style="color: #990000"><<</span><span style="color: #FF0000">"content-type"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"text/html"</span><span style="color: #990000">>></span>,
<span style="color: #990000"><<</span><span style="color: #FF0000">"content-encoding"</span><span style="color: #990000">>></span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"gzip"</span><span style="color: #990000">>></span>
}, <span style="color: #009900">Req0</span>)<span style="color: #990000">.</span></tt></pre></div></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">See also</h2>
<div class="sectionbody">
<div class="paragraph"><p><a href="../cowboy_req">cowboy_req(3)</a>,
<a href="../cowboy_req.set_resp_cookie">cowboy_req:set_resp_cookie(3)</a>,
<a href="../cowboy_req.set_resp_header">cowboy_req:set_resp_header(3)</a>,
<a href="../cowboy_req.has_resp_header">cowboy_req:has_resp_header(3)</a>,
<a href="../cowboy_req.resp_header">cowboy_req:resp_header(3)</a>,
<a href="../cowboy_req.resp_headers">cowboy_req:resp_headers(3)</a>,
<a href="../cowboy_req.delete_resp_header">cowboy_req:delete_resp_header(3)</a>,
<a href="../cowboy_req.reply">cowboy_req:reply(3)</a>,
<a href="../cowboy_req.stream_reply">cowboy_req:stream_reply(3)</a></p></div>
</div>
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