199 lines
6.8 KiB
HTML
199 lines
6.8 KiB
HTML
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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<title>Class: Rack::ConditionalGet</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta http-equiv="Content-Script-Type" content="text/javascript" />
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<link rel="stylesheet" href="../.././rdoc-style.css" type="text/css" media="screen" />
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<script type="text/javascript">
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// <![CDATA[
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function popupCode( url ) {
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window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400")
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}
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function toggleCode( id ) {
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if ( document.getElementById )
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elem = document.getElementById( id );
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else if ( document.all )
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elem = eval( "document.all." + id );
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else
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return false;
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elemStyle = elem.style;
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if ( elemStyle.display != "block" ) {
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elemStyle.display = "block"
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} else {
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elemStyle.display = "none"
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}
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return true;
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}
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// Make codeblocks hidden by default
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document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }</style>" )
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// ]]>
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</script>
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</head>
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<body>
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<div id="classHeader">
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<table class="header-table">
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<tr class="top-aligned-row">
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<td><strong>Class</strong></td>
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<td class="class-name-in-header">Rack::ConditionalGet</td>
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</tr>
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<tr class="top-aligned-row">
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<td><strong>In:</strong></td>
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<td>
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<a href="../../files/lib/rack/conditionalget_rb.html">
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lib/rack/conditionalget.rb
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</a>
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<br />
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</td>
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</tr>
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<tr class="top-aligned-row">
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<td><strong>Parent:</strong></td>
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<td>
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Object
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</td>
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</tr>
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</table>
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</div>
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<!-- banner header -->
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<div id="bodyContent">
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<div id="contextContent">
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<div id="description">
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<p>
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Middleware that enables conditional GET using If-None-Match and
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If-Modified-Since. The application should set either or both of the
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Last-Modified or Etag response headers according to RFC 2616. When either
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of the conditions is met, the response body is set to be zero length and
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the response status is set to 304 Not Modified.
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</p>
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<p>
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Applications that defer response body generation until the body‘s
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each message is received will avoid response body generation completely
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when a conditional GET matches.
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</p>
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<p>
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Adapted from Michael Klishin‘s Merb implementation: <a
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href="http://github.com/wycats/merb-core/tree/master/lib/merb-core/rack/middleware/conditional_get.rb">github.com/wycats/merb-core/tree/master/lib/merb-core/rack/middleware/conditional_get.rb</a>
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</p>
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</div>
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</div>
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<div id="method-list">
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<h3 class="section-bar">Methods</h3>
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<div class="name-list">
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<a href="#M000191">call</a>
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<a href="#M000190">new</a>
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</div>
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</div>
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</div>
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<!-- if includes -->
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<div id="section">
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<!-- if method_list -->
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<div id="methods">
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<h3 class="section-bar">Public Class methods</h3>
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<div id="method-M000190" class="method-detail">
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<a name="M000190"></a>
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<div class="method-heading">
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<a href="#M000190" class="method-signature">
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<span class="method-name">new</span><span class="method-args">(app)</span>
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</a>
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</div>
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<div class="method-description">
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<p><a class="source-toggle" href="#"
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onclick="toggleCode('M000190-source');return false;">[Source]</a></p>
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<div class="method-source-code" id="M000190-source">
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<pre>
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<span class="ruby-comment cmt"># File lib/rack/conditionalget.rb, line 16</span>
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16: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">app</span>)
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17: <span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span>
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18: <span class="ruby-keyword kw">end</span>
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</pre>
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</div>
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</div>
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</div>
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<h3 class="section-bar">Public Instance methods</h3>
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<div id="method-M000191" class="method-detail">
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<a name="M000191"></a>
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<div class="method-heading">
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<a href="#M000191" class="method-signature">
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<span class="method-name">call</span><span class="method-args">(env)</span>
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</a>
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</div>
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<div class="method-description">
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<p><a class="source-toggle" href="#"
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onclick="toggleCode('M000191-source');return false;">[Source]</a></p>
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<div class="method-source-code" id="M000191-source">
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<pre>
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<span class="ruby-comment cmt"># File lib/rack/conditionalget.rb, line 20</span>
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20: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
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21: <span class="ruby-keyword kw">return</span> <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>) <span class="ruby-keyword kw">unless</span> <span class="ruby-node">%w[GET HEAD]</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">env</span>[<span class="ruby-value str">'REQUEST_METHOD'</span>])
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22:
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23: <span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span> = <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
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24: <span class="ruby-identifier">headers</span> = <span class="ruby-constant">Utils</span><span class="ruby-operator">::</span><span class="ruby-constant">HeaderHash</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">headers</span>)
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25: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">etag_matches?</span>(<span class="ruby-identifier">env</span>, <span class="ruby-identifier">headers</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">modified_since?</span>(<span class="ruby-identifier">env</span>, <span class="ruby-identifier">headers</span>)
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26: <span class="ruby-identifier">status</span> = <span class="ruby-value">304</span>
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27: <span class="ruby-identifier">body</span> = []
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28: <span class="ruby-keyword kw">end</span>
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29: [<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span>]
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30: <span class="ruby-keyword kw">end</span>
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</pre>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div id="validator-badges">
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<p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p>
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</div>
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</body>
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</html>
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