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Code Editor : vcl-example-websockets.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Adding WebSockets support — Varnish version 5.2.1 documentation</title> <link rel="stylesheet" href="../_static/classic.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '5.2.1', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="top" title="Varnish version 5.2.1 documentation" href="../index.html" /> <link rel="up" title="VCL Examples" href="vcl-examples.html" /> <link rel="next" title="Device detection" href="devicedetection.html" /> <link rel="prev" title="ACLs" href="vcl-example-acls.html" /> </head> <body role="document"> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" accesskey="I">index</a></li> <li class="right" > <a href="devicedetection.html" title="Device detection" accesskey="N">next</a> |</li> <li class="right" > <a href="vcl-example-acls.html" title="ACLs" accesskey="P">previous</a> |</li> <li class="nav-item nav-item-0"><a href="../index.html">Varnish version 5.2.1 documentation</a> »</li> <li class="nav-item nav-item-1"><a href="index.html" >The Varnish Users Guide</a> »</li> <li class="nav-item nav-item-2"><a href="vcl.html" >VCL - Varnish Configuration Language</a> »</li> <li class="nav-item nav-item-3"><a href="vcl-examples.html" accesskey="U">VCL Examples</a> »</li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="adding-websockets-support"> <h1>Adding WebSockets support<a class="headerlink" href="#adding-websockets-support" title="Permalink to this headline">ΒΆ</a></h1> <p>WebSockets is a technology for creating a bidirectional stream-based channel over HTTP.</p> <p>To run WebSockets through Varnish you need to pipe the request and copy the Upgrade and Connection headers as follows:</p> <div class="highlight-default"><div class="highlight"><pre><span></span><span class="n">sub</span> <span class="n">vcl_recv</span> <span class="p">{</span> <span class="k">if</span> <span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">upgrade</span> <span class="o">~</span> <span class="s2">"(?i)websocket"</span><span class="p">)</span> <span class="p">{</span> <span class="k">return</span> <span class="p">(</span><span class="n">pipe</span><span class="p">);</span> <span class="p">}</span> <span class="p">}</span> <span class="n">sub</span> <span class="n">vcl_pipe</span> <span class="p">{</span> <span class="k">if</span> <span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">upgrade</span><span class="p">)</span> <span class="p">{</span> <span class="nb">set</span> <span class="n">bereq</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">upgrade</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">upgrade</span><span class="p">;</span> <span class="nb">set</span> <span class="n">bereq</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">connection</span> <span class="o">=</span> <span class="n">req</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">connection</span><span class="p">;</span> <span class="p">}</span> <span class="p">}</span> </pre></div> </div> </div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h4>Previous topic</h4> <p class="topless"><a href="vcl-example-acls.html" title="previous chapter">ACLs</a></p> <h4>Next topic</h4> <p class="topless"><a href="devicedetection.html" title="next chapter">Device detection</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/users-guide/vcl-example-websockets.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <div class="clearer"></div> </div> <div class="related" role="navigation" aria-label="related navigation"> <h3>Navigation</h3> <ul> <li class="right" style="margin-right: 10px"> <a href="../genindex.html" title="General Index" >index</a></li> <li class="right" > <a href="devicedetection.html" title="Device detection" >next</a> |</li> <li class="right" > <a href="vcl-example-acls.html" title="ACLs" >previous</a> |</li> <li class="nav-item nav-item-0"><a href="../index.html">Varnish version 5.2.1 documentation</a> »</li> <li class="nav-item nav-item-1"><a href="index.html" >The Varnish Users Guide</a> »</li> <li class="nav-item nav-item-2"><a href="vcl.html" >VCL - Varnish Configuration Language</a> »</li> <li class="nav-item nav-item-3"><a href="vcl-examples.html" >VCL Examples</a> »</li> </ul> </div> <div class="footer" role="contentinfo"> © Copyright 2010-2014, Varnish Software AS. 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