Server : LiteSpeed System : Linux premium163.web-hosting.com 4.18.0-513.18.1.lve.el8.x86_64 #1 SMP Thu Feb 22 12:55:50 UTC 2024 x86_64 User : infihsqw ( 644) PHP Version : 8.1.29 Disable Function : NONE Directory : /opt/cpanel/ea-ruby27/root/usr/share/gems/doc/rack-2.2.8/rdoc/Rack/ |
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>module Rack::Handler - rack-2.2.8 Documentation</title>
<script type="text/javascript">
var rdoc_rel_prefix = "../";
var index_rel_prefix = "../";
</script>
<script src="../js/navigation.js" defer></script>
<script src="../js/search.js" defer></script>
<script src="../js/search_index.js" defer></script>
<script src="../js/searcher.js" defer></script>
<script src="../js/darkfish.js" defer></script>
<link href="../css/fonts.css" rel="stylesheet">
<link href="../css/rdoc.css" rel="stylesheet">
<body id="top" role="document" class="module">
<nav role="navigation">
<div id="project-navigation">
<div id="home-section" role="region" title="Quick navigation" class="nav-section">
<h2>
<a href="../index.html" rel="home">Home</a>
</h2>
<div id="table-of-contents-navigation">
<a href="../table_of_contents.html#pages">Pages</a>
<a href="../table_of_contents.html#classes">Classes</a>
<a href="../table_of_contents.html#methods">Methods</a>
</div>
</div>
<div id="search-section" role="search" class="project-section initially-hidden">
<form action="#" method="get" accept-charset="utf-8">
<div id="search-field-wrapper">
<input id="search-field" role="combobox" aria-label="Search"
aria-autocomplete="list" aria-controls="search-results"
type="text" name="search" placeholder="Search" spellcheck="false"
title="Type to search, Up and Down to navigate, Enter to load">
</div>
<ul id="search-results" aria-label="Search Results"
aria-busy="false" aria-expanded="false"
aria-atomic="false" class="initially-hidden"></ul>
</form>
</div>
</div>
<div id="class-metadata">
<!-- Method Quickref -->
<div id="method-list-section" class="nav-section">
<h3>Methods</h3>
<ul class="link-list" role="directory">
<li ><a href="#method-c-default">::default</a>
<li ><a href="#method-c-get">::get</a>
<li ><a href="#method-c-pick">::pick</a>
<li ><a href="#method-c-register">::register</a>
<li ><a href="#method-c-try_require">::try_require</a>
</ul>
</div>
</div>
</nav>
<main role="main" aria-labelledby="module-Rack::Handler">
<h1 id="module-Rack::Handler" class="module">
module Rack::Handler
</h1>
<section class="description">
<p><strong>Handlers</strong> connect web servers with <a href="../Rack.html"><code>Rack</code></a>.</p>
<p><a href="../Rack.html"><code>Rack</code></a> includes Handlers for <a href="Handler/Thin.html"><code>Thin</code></a>, <a href="Handler/WEBrick.html"><code>WEBrick</code></a>, <a href="Handler/FastCGI.html"><code>FastCGI</code></a>, <a href="Handler/CGI.html"><code>CGI</code></a>, <a href="Handler/SCGI.html"><code>SCGI</code></a> and LiteSpeed.</p>
<p>Handlers usually are activated by calling <code>MyHandler.run(myapp)</code>. A second optional hash can be passed to include server-specific configuration.</p>
</section>
<section id="5Buntitled-5D" class="documentation-section">
<section class="constants-list">
<header>
<h3>Constants</h3>
</header>
<dl>
<dt id="SERVER_NAMES">SERVER_NAMES
<dd>
</dl>
</section>
<section id="public-class-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Class Methods</h3>
</header>
<div id="method-c-default" class="method-detail ">
<div class="method-heading">
<span class="method-name">default</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="default-source">
<pre><span class="ruby-comment"># File lib/rack/handler.rb, line 51</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">default</span>
<span class="ruby-comment"># Guess.</span>
<span class="ruby-keyword">if</span> <span class="ruby-constant">ENV</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-string">"PHP_FCGI_CHILDREN"</span>)
<span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Handler</span><span class="ruby-operator">::</span><span class="ruby-constant">FastCGI</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-constant">ENV</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-constant">REQUEST_METHOD</span>)
<span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Handler</span><span class="ruby-operator">::</span><span class="ruby-constant">CGI</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-constant">ENV</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-string">"RACK_HANDLER"</span>)
<span class="ruby-keyword">self</span>.<span class="ruby-identifier">get</span>(<span class="ruby-constant">ENV</span>[<span class="ruby-string">"RACK_HANDLER"</span>])
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">pick</span> <span class="ruby-constant">SERVER_NAMES</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-c-get" class="method-detail ">
<div class="method-heading">
<span class="method-name">get</span><span
class="method-args">(server)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="get-source">
<pre><span class="ruby-comment"># File lib/rack/handler.rb, line 13</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">get</span>(<span class="ruby-identifier">server</span>)
<span class="ruby-keyword">return</span> <span class="ruby-keyword">unless</span> <span class="ruby-identifier">server</span>
<span class="ruby-identifier">server</span> = <span class="ruby-identifier">server</span>.<span class="ruby-identifier">to_s</span>
<span class="ruby-keyword">unless</span> <span class="ruby-ivar">@handlers</span>.<span class="ruby-identifier">include?</span> <span class="ruby-identifier">server</span>
<span class="ruby-identifier">load_error</span> = <span class="ruby-identifier">try_require</span>(<span class="ruby-string">'rack/handler'</span>, <span class="ruby-identifier">server</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">klass</span> = <span class="ruby-ivar">@handlers</span>[<span class="ruby-identifier">server</span>]
<span class="ruby-identifier">const_get</span>(<span class="ruby-identifier">klass</span>)
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">const_get</span>(<span class="ruby-identifier">server</span>, <span class="ruby-keyword">false</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">NameError</span> <span class="ruby-operator">=></span> <span class="ruby-identifier">name_error</span>
<span class="ruby-identifier">raise</span> <span class="ruby-identifier">load_error</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">name_error</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-c-pick" class="method-detail ">
<div class="method-heading">
<span class="method-name">pick</span><span
class="method-args">(server_names)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Select first available <a href="../Rack.html"><code>Rack</code></a> handler given an `Array` of server names. Raises `LoadError` if no handler was found.</p>
<pre>> pick ['thin', 'webrick']
=> Rack::Handler::WEBrick</pre>
<div class="method-source-code" id="pick-source">
<pre><span class="ruby-comment"># File lib/rack/handler.rb, line 36</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">pick</span>(<span class="ruby-identifier">server_names</span>)
<span class="ruby-identifier">server_names</span> = <span class="ruby-constant">Array</span>(<span class="ruby-identifier">server_names</span>)
<span class="ruby-identifier">server_names</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">server_name</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">begin</span>
<span class="ruby-keyword">return</span> <span class="ruby-identifier">get</span>(<span class="ruby-identifier">server_name</span>.<span class="ruby-identifier">to_s</span>)
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">LoadError</span>, <span class="ruby-constant">NameError</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">LoadError</span>, <span class="ruby-node">"Couldn't find handler for: #{server_names.join(', ')}."</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-c-register" class="method-detail ">
<div class="method-heading">
<span class="method-name">register</span><span
class="method-args">(server, klass)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="register-source">
<pre><span class="ruby-comment"># File lib/rack/handler.rb, line 85</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">register</span>(<span class="ruby-identifier">server</span>, <span class="ruby-identifier">klass</span>)
<span class="ruby-ivar">@handlers</span> <span class="ruby-operator">||=</span> {}
<span class="ruby-ivar">@handlers</span>[<span class="ruby-identifier">server</span>.<span class="ruby-identifier">to_s</span>] = <span class="ruby-identifier">klass</span>.<span class="ruby-identifier">to_s</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
<div id="method-c-try_require" class="method-detail ">
<div class="method-heading">
<span class="method-name">try_require</span><span
class="method-args">(prefix, const_name)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Transforms server-name constants to their canonical form as filenames, then tries to require them but silences the LoadError if not found</p>
<p>Naming convention:</p>
<pre class="ruby"><span class="ruby-constant">Foo</span> <span class="ruby-comment"># => 'foo'</span>
<span class="ruby-constant">FooBar</span> <span class="ruby-comment"># => 'foo_bar.rb'</span>
<span class="ruby-constant">FooBAR</span> <span class="ruby-comment"># => 'foobar.rb'</span>
<span class="ruby-constant">FOObar</span> <span class="ruby-comment"># => 'foobar.rb'</span>
<span class="ruby-constant">FOOBAR</span> <span class="ruby-comment"># => 'foobar.rb'</span>
<span class="ruby-constant">FooBarBaz</span> <span class="ruby-comment"># => 'foo_bar_baz.rb'</span>
</pre>
<div class="method-source-code" id="try_require-source">
<pre><span class="ruby-comment"># File lib/rack/handler.rb, line 75</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">try_require</span>(<span class="ruby-identifier">prefix</span>, <span class="ruby-identifier">const_name</span>)
<span class="ruby-identifier">file</span> = <span class="ruby-identifier">const_name</span>.<span class="ruby-identifier">gsub</span>(<span class="ruby-regexp">/^[A-Z]+/</span>) { <span class="ruby-operator">|</span><span class="ruby-identifier">pre</span><span class="ruby-operator">|</span> <span class="ruby-identifier">pre</span>.<span class="ruby-identifier">downcase</span> }.
<span class="ruby-identifier">gsub</span>(<span class="ruby-regexp">/[A-Z]+[^A-Z]/</span>, <span class="ruby-string">'_\&'</span>).<span class="ruby-identifier">downcase</span>
<span class="ruby-identifier">require</span>(<span class="ruby-operator">::</span><span class="ruby-constant">File</span>.<span class="ruby-identifier">join</span>(<span class="ruby-identifier">prefix</span>, <span class="ruby-identifier">file</span>))
<span class="ruby-keyword">nil</span>
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">LoadError</span> <span class="ruby-operator">=></span> <span class="ruby-identifier">error</span>
<span class="ruby-identifier">error</span>
<span class="ruby-keyword">end</span></pre>
</div>
</div>
</div>
</section>
</section>
</main>
<footer id="validator-badges" role="contentinfo">
<p><a href="https://validator.w3.org/check/referer">Validate</a>
<p>Generated by <a href="https://ruby.github.io/rdoc/">RDoc</a> 6.2.1.1.
<p>Based on <a href="http://deveiate.org/projects/Darkfish-RDoc/">Darkfish</a> by <a href="http://deveiate.org">Michael Granger</a>.
</footer>