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+<h1 class="lined-header"><span>gun:connect(3)</span></h1>
+
+<h2 id="_name">Name</h2>
+<p>gun:connect - Establish a tunnel to the origin server</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">connect</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">Destination</font>)
+ <font color="#990000">-&gt;</font> <b><font color="#000000">connect</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">Destination</font>, [], #{})<font color="#990000">.</font>
+
+<b><font color="#000000">connect</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">Destination</font>, <font color="#009900">Headers</font>)
+ <font color="#990000">-&gt;</font> <b><font color="#000000">connect</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">Destination</font>, <font color="#009900">Headers</font>, #{})<font color="#990000">.</font>
+
+<b><font color="#000000">connect</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">Destination</font>, <font color="#009900">Headers</font>, <font color="#009900">ReqOpts</font>)
+ <font color="#990000">-&gt;</font> <font color="#009900">StreamRef</font>
+
+<font color="#009900">ConnPid</font> <font color="#990000">::</font> <b><font color="#000080">pid</font></b>()
+<font color="#009900">Destination</font> <font color="#990000">::</font> <b><font color="#000000">gun:connect_destination</font></b>()
+<font color="#009900">Headers</font> <font color="#990000">::</font> <b><font color="#000000">gun:req_headers</font></b>()
+<font color="#009900">ReqOpts</font> <font color="#990000">::</font> <b><font color="#000000">gun:req_opts</font></b>()
+<font color="#009900">StreamRef</font> <font color="#990000">::</font> <b><font color="#000000">gun:stream_ref</font></b>()</tt></pre>
+</div></div>
+<p>Establish a tunnel to the origin server.</p>
+<p>This feature is currently only available for HTTP/1.1 connections. Upon successful completion of the CONNECT request a tunnel is established and subsequent requests will go through the tunnel.</p>
+<p>Gun will not automatically re-issue the CONNECT request upon reconnection to the proxy server. The <code>gun_up</code> message can be used to know when the tunnel needs to be established again.</p>
+<h2 id="_arguments">Arguments</h2>
+<dl><dt>ConnPid</dt>
+<dd><p>The pid of the Gun connection process.</p>
+</dd>
+<dt>Destination</dt>
+<dd><p>Destination of the CONNECT request.</p>
+</dd>
+<dt>Headers</dt>
+<dd><p>Additional request headers.</p>
+</dd>
+<dt>ReqOpts</dt>
+<dd><p>Request options.</p>
+</dd>
+</dl>
+<h2 id="_return_value">Return value</h2>
+<p>A reference that identifies the newly created stream is returned. It is this reference that must be passed in subsequent calls and will be received in messages related to this new stream.</p>
+<h2 id="_changelog">Changelog</h2>
+<ul><li><strong>1.2</strong>: Function introduced.
+</li>
+</ul>
+<h2 id="_examples">Examples</h2>
+<div class="listingblock"><div class="title">Establish a tunnel</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="#FF6600">ok</font>, <font color="#009900">ConnPid</font>} <font color="#990000">=</font> <b><font color="#000000">gun:open</font></b>(<font color="#FF0000">"proxy.example.org"</font>, <font color="#993399">1080</font>),
+{<font color="#FF6600">ok</font>, <font color="#FF6600">http</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await_up</font></b>(<font color="#009900">ConnPid</font>),
+<font color="#009900">StreamRef</font> <font color="#990000">=</font> <b><font color="#000000">gun:connect</font></b>(<font color="#009900">ConnPid</font>, #{
+ <font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"origin-server.example.org"</font>,
+ <font color="#0000FF">port</font> <font color="#990000">=&gt;</font> <font color="#993399">80</font>
+}),
+{<font color="#FF6600">response</font>, <font color="#FF6600">fin</font>, <font color="#993399">200</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>),
+<i><font color="#9A1900">%% Subsequent requests will be sent to origin-server.example.org.</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Establish a tunnel for a secure HTTP/2 connection</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="#FF6600">ok</font>, <font color="#009900">ConnPid</font>} <font color="#990000">=</font> <b><font color="#000000">gun:open</font></b>(<font color="#FF0000">"proxy.example.org"</font>, <font color="#993399">1080</font>),
+{<font color="#FF6600">ok</font>, <font color="#FF6600">http</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await_up</font></b>(<font color="#009900">ConnPid</font>),
+<font color="#009900">StreamRef</font> <font color="#990000">=</font> <b><font color="#000000">gun:connect</font></b>(<font color="#009900">ConnPid</font>, #{
+ <font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"origin-server.example.org"</font>,
+ <font color="#0000FF">port</font> <font color="#990000">=&gt;</font> <font color="#993399">443</font>,
+ <font color="#0000FF">protocols</font> <font color="#990000">=&gt;</font> [<font color="#FF6600">http2</font>],
+ <font color="#0000FF">transport</font> <font color="#990000">=&gt;</font> <font color="#FF6600">tls</font>
+}),
+{<font color="#FF6600">response</font>, <font color="#FF6600">fin</font>, <font color="#993399">200</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>),
+<i><font color="#9A1900">%% Subsequent requests will be sent to origin-server.example.org.</font></i></tt></pre>
+</div></div>
+<div class="listingblock"><div class="title">Establish a tunnel using proxy authorization</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="#FF6600">ok</font>, <font color="#009900">ConnPid</font>} <font color="#990000">=</font> <b><font color="#000000">gun:open</font></b>(<font color="#FF0000">"proxy.example.org"</font>, <font color="#993399">1080</font>),
+{<font color="#FF6600">ok</font>, <font color="#FF6600">http</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await_up</font></b>(<font color="#009900">ConnPid</font>),
+<font color="#009900">StreamRef</font> <font color="#990000">=</font> <b><font color="#000000">gun:connect</font></b>(<font color="#009900">ConnPid</font>, #{
+ <font color="#0000FF">host</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"origin-server.example.org"</font>,
+ <font color="#0000FF">port</font> <font color="#990000">=&gt;</font> <font color="#993399">80</font>,
+ <font color="#0000FF">username</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"essen"</font>,
+ <font color="#0000FF">password</font> <font color="#990000">=&gt;</font> <font color="#FF0000">"myrealpasswordis"</font>
+}),
+{<font color="#FF6600">response</font>, <font color="#FF6600">fin</font>, <font color="#993399">200</font>, <font color="#990000">_</font>} <font color="#990000">=</font> <b><font color="#000000">gun:await</font></b>(<font color="#009900">ConnPid</font>, <font color="#009900">StreamRef</font>),
+<i><font color="#9A1900">%% Subsequent requests will be sent to origin-server.example.org.</font></i></tt></pre>
+</div></div>
+<h2 id="_see_also">See also</h2>
+<p><a href="../gun">gun(3)</a>, <a href="../gun.await_up">gun:await_up(3)</a>, <a href="../gun_up">gun_up(3)</a></p>
+
+
+
+
+
+
+</div>
+
+<div class="span3 sidecol">
+
+
+<h3>
+ Gun
+ 2.1
+ Function Reference
+
+</h3>
+
+<ul>
+
+ <li><a href="/docs/en/gun/2.1/guide">User Guide</a></li>
+
+
+ <li><a href="/docs/en/gun/2.1/manual">Function Reference</a></li>
+
+
+</ul>
+
+<h4 id="docs-nav">Navigation</h4>
+
+<h4>Version select</h4>
+<ul>
+
+
+
+ <li><a href="/docs/en/gun/2.1/manual">2.1</a></li>
+
+ <li><a href="/docs/en/gun/2.0/manual">2.0</a></li>
+
+ <li><a href="/docs/en/gun/1.3/manual">1.3</a></li>
+
+ <li><a href="/docs/en/gun/1.2/manual">1.2</a></li>
+
+ <li><a href="/docs/en/gun/1.1/manual">1.1</a></li>
+
+ <li><a href="/docs/en/gun/1.0/manual">1.0</a></li>
+
+</ul>
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