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<h1 class="lined-header"><span>cowboy_req:uri(3)</span></h1>
<div class="sect1">
<h2 id="_name">Name</h2>
<div class="sectionbody">
<div class="paragraph"><p>cowboy_req:uri - Reconstructed URI</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">uri</span></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="font-weight: bold"><span style="color: #000000">uri</span></span>(<span style="color: #009900">Req</span>, #{})
<span style="font-weight: bold"><span style="color: #000000">uri</span></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: #009900">Opts</span>) <span style="color: #990000">-></span> <span style="color: #009900">URI</span> <span style="color: #990000">::</span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>()
<span style="color: #009900">Opts</span> <span style="color: #990000">::</span> #{
<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>,
<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>,
<span style="color: #0000FF">port</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">inet:port_number</span></span>() | <span style="color: #000080">undefined</span>,
<span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>,
<span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>,
<span style="color: #0000FF">fragment</span> <span style="color: #990000">=></span> <span style="font-weight: bold"><span style="color: #000000">iodata</span></span>() | <span style="color: #000080">undefined</span>
}</tt></pre></div></div>
<div class="paragraph"><p>Reconstruct the effective request URI, optionally modifying components.</p></div>
<div class="paragraph"><p>By default Cowboy will build a URI using the components found
in the request. Options allow disabling or replacing individual
components.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_arguments">Arguments</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
Req
</dt>
<dd>
<p>
The Req object.
</p>
</dd>
<dt class="hdlist1">
Opts
</dt>
<dd>
<p>
Map for overriding individual components.
</p>
<div class="paragraph"><p>To replace a component, provide its new value as a binary
string or an iolist. To disable a component, set its value
to <code>undefined</code>.</p></div>
<div class="paragraph"><p>As this function always returns a valid URI, there are some
things to note:</p></div>
<div class="ulist"><ul>
<li>
<p>
Disabling the host also disables the scheme and port.
</p>
</li>
<li>
<p>
There is no fragment component by default as these are
not sent with the request.
</p>
</li>
<li>
<p>
The port number may not appear in the resulting URI if
it is the default port for the given scheme (http: 80; https: 443).
</p>
</li>
</ul></div>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_return_value">Return value</h2>
<div class="sectionbody">
<div class="paragraph"><p>The reconstructed URI is returned as an iolist or a binary string.</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>: Individual components can be replaced or disabled.
</p>
</li>
<li>
<p>
<strong>2.0</strong>: Only the URI is returned, it is no longer wrapped in a tuple.
</p>
</li>
<li>
<p>
<strong>2.0</strong>: Function introduced. Replaces <code>host_url/1</code> and <code>url/1</code>.
</p>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">Examples</h2>
<div class="sectionbody">
<div class="paragraph"><p>With an effective request URI <a href="http://example.org/path/to/res?edit=1">http://example.org/path/to/res?edit=1</a>
we can have:</p></div>
<div class="listingblock">
<div class="title">Protocol relative form</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="font-style: italic"><span style="color: #9A1900">%% //example.org/path/to/res?edit=1</span></span>
<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div>
<div class="listingblock">
<div class="title">Serialized origin for use in the origin header</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="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">http://example.org</span></span>
<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">path</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>, <span style="color: #0000FF">qs</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div>
<div class="listingblock">
<div class="title">HTTP/1.1 origin form (path and query string only)</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="font-style: italic"><span style="color: #9A1900">%% /path/to/res?edit=1</span></span>
<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">host</span> <span style="color: #990000">=></span> <span style="color: #000080">undefined</span>})<span style="color: #990000">.</span></tt></pre></div></div>
<div class="listingblock">
<div class="title">Add a fragment to the URI</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="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">http://example.org/path/to/res</span></span><span style="font-style: italic"><span style="color: #9A1900">?edit=1#errors</span></span>
<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">fragment</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"errors"</span><span style="color: #990000">>></span>})<span style="color: #990000">.</span></tt></pre></div></div>
<div class="listingblock">
<div class="title">Ensure the scheme is HTTPS</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="font-style: italic"><span style="color: #9A1900">%% </span></span><span style="text-decoration: underline"><span style="color: #0000FF">https://example.org/path/to/res</span></span><span style="font-style: italic"><span style="color: #9A1900">?edit=1</span></span>
<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</span>, #{<span style="color: #0000FF">scheme</span> <span style="color: #990000">=></span> <span style="color: #990000"><<</span><span style="color: #FF0000">"https"</span><span style="color: #990000">>></span>})<span style="color: #990000">.</span></tt></pre></div></div>
<div class="listingblock">
<div class="title">Convert the URI to a binary string</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="font-weight: bold"><span style="color: #000000">iolist_to_binary</span></span>(<span style="font-weight: bold"><span style="color: #000000">cowboy_req:uri</span></span>(<span style="color: #009900">Req</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.scheme">cowboy_req:scheme(3)</a>,
<a href="../cowboy_req.host">cowboy_req:host(3)</a>,
<a href="../cowboy_req.port">cowboy_req:port(3)</a>,
<a href="../cowboy_req.path">cowboy_req:path(3)</a>,
<a href="../cowboy_req.qs">cowboy_req:qs(3)</a></p></div>
</div>
</div>
</div>
<div class="span3 sidecol">
<h3>
Cowboy
2.1
Function Reference
</h3>
<ul>
<li><a href="/docs/en/cowboy/2.1/guide">User Guide</a></li>
<li><a href="/docs/en/cowboy/2.1/manual">Function Reference</a></li>
</ul>
<h4 id="docs-nav">Navigation</h4>
<h4>Version select</h4>
<ul>
<li><a href="/docs/en/cowboy/2.4/manual">2.4</a></li>
<li><a href="/docs/en/cowboy/2.3/manual">2.3</a></li>
<li><a href="/docs/en/cowboy/2.2/manual">2.2</a></li>
<li><a href="/docs/en/cowboy/2.1/manual">2.1</a></li>
<li><a href="/docs/en/cowboy/2.0/manual">2.0</a></li>
<li><a href="/docs/en/cowboy/1.0/manual">1.0</a></li>
</ul>
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