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<head>
<title>Class: Rack::Response</title>
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<body>
<div id="classHeader">
<table class="header-table">
<tr class="top-aligned-row">
<td><strong>Class</strong></td>
<td class="class-name-in-header">Rack::Response</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../../files/lib/rack/response_rb.html">
lib/rack/response.rb
</a>
<br />
</td>
</tr>
<tr class="top-aligned-row">
<td><strong>Parent:</strong></td>
<td>
Object
</td>
</tr>
</table>
</div>
<!-- banner header -->
<div id="bodyContent">
<div id="contextContent">
<div id="description">
<p>
<a href="Response.html">Rack::Response</a> provides a convenient interface
to create a <a href="../Rack.html">Rack</a> response.
</p>
<p>
It allows setting of headers and cookies, and provides useful defaults (a
OK response containing HTML).
</p>
<p>
You can use <a href="Response.html#M000096">Response#write</a> to
iteratively generate your response, but note that this is buffered by <a
href="Response.html">Rack::Response</a> until you call <tt><a
href="Response.html#M000093">finish</a></tt>. <tt><a
href="Response.html#M000093">finish</a></tt> however can take a block
inside which calls to <tt><a href="Response.html#M000096">write</a></tt>
are syncronous with the <a href="../Rack.html">Rack</a> response.
</p>
<p>
Your application&#8216;s <tt>call</tt> should end returning <a
href="Response.html#M000093">Response#finish</a>.
</p>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000089">[]</a>&nbsp;&nbsp;
<a href="#M000090">[]=</a>&nbsp;&nbsp;
<a href="#M000097">close</a>&nbsp;&nbsp;
<a href="#M000092">delete_cookie</a>&nbsp;&nbsp;
<a href="#M000095">each</a>&nbsp;&nbsp;
<a href="#M000098">empty?</a>&nbsp;&nbsp;
<a href="#M000093">finish</a>&nbsp;&nbsp;
<a href="#M000088">new</a>&nbsp;&nbsp;
<a href="#M000091">set_cookie</a>&nbsp;&nbsp;
<a href="#M000094">to_a</a>&nbsp;&nbsp;
<a href="#M000096">write</a>&nbsp;&nbsp;
</div>
</div>
</div>
<!-- if includes -->
<div id="includes">
<h3 class="section-bar">Included Modules</h3>
<div id="includes-list">
<span class="include-name"><a href="Response/Helpers.html">Helpers</a></span>
</div>
</div>
<div id="section">
<div id="class-list">
<h3 class="section-bar">Classes and Modules</h3>
Module <a href="Response/Helpers.html" class="link">Rack::Response::Helpers</a><br />
</div>
<div id="aliases-list">
<h3 class="section-bar">External Aliases</h3>
<div class="name-list">
<table summary="aliases">
<tr class="top-aligned-row context-row">
<td class="context-item-name">header</td>
<td>-&gt;</td>
<td class="context-item-value">headers</td>
</tr>
</table>
</div>
</div>
<div id="attribute-list">
<h3 class="section-bar">Attributes</h3>
<div class="name-list">
<table>
<tr class="top-aligned-row context-row">
<td class="context-item-name">body</td>
<td class="context-item-value">&nbsp;[RW]&nbsp;</td>
<td class="context-item-desc"></td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">header</td>
<td class="context-item-value">&nbsp;[R]&nbsp;</td>
<td class="context-item-desc"></td>
</tr>
<tr class="top-aligned-row context-row">
<td class="context-item-name">status</td>
<td class="context-item-value">&nbsp;[RW]&nbsp;</td>
<td class="context-item-desc"></td>
</tr>
</table>
</div>
</div>
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000088" class="method-detail">
<a name="M000088"></a>
<div class="method-heading">
<a href="#M000088" class="method-signature">
<span class="method-name">new</span><span class="method-args">(body=[], status=200, header={}) {|self if block_given?| ...}</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000088-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000088-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 19</span>
19: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">body</span>=[], <span class="ruby-identifier">status</span>=<span class="ruby-value">200</span>, <span class="ruby-identifier">header</span>={}, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
20: <span class="ruby-ivar">@status</span> = <span class="ruby-identifier">status</span>
21: <span class="ruby-ivar">@header</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-value str">&quot;Content-Type&quot;</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-value str">&quot;text/html&quot;</span>}.
22: <span class="ruby-identifier">merge</span>(<span class="ruby-identifier">header</span>))
23:
24: <span class="ruby-ivar">@writer</span> = <span class="ruby-identifier">lambda</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">x</span><span class="ruby-operator">|</span> <span class="ruby-ivar">@body</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">x</span> }
25: <span class="ruby-ivar">@block</span> = <span class="ruby-keyword kw">nil</span>
26: <span class="ruby-ivar">@length</span> = <span class="ruby-value">0</span>
27:
28: <span class="ruby-ivar">@body</span> = []
29:
30: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span> <span class="ruby-identifier">:to_str</span>
31: <span class="ruby-identifier">write</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">to_str</span>
32: <span class="ruby-keyword kw">elsif</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:each</span>)
33: <span class="ruby-identifier">body</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">part</span><span class="ruby-operator">|</span>
34: <span class="ruby-identifier">write</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">to_s</span>
35: }
36: <span class="ruby-keyword kw">else</span>
37: <span class="ruby-identifier">raise</span> <span class="ruby-constant">TypeError</span>, <span class="ruby-value str">&quot;stringable or iterable required&quot;</span>
38: <span class="ruby-keyword kw">end</span>
39:
40: <span class="ruby-keyword kw">yield</span> <span class="ruby-keyword kw">self</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">block_given?</span>
41: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000089" class="method-detail">
<a name="M000089"></a>
<div class="method-heading">
<a href="#M000089" class="method-signature">
<span class="method-name">[]</span><span class="method-args">(key)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000089-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000089-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 46</span>
46: <span class="ruby-keyword kw">def</span> <span class="ruby-operator">[]</span>(<span class="ruby-identifier">key</span>)
47: <span class="ruby-identifier">header</span>[<span class="ruby-identifier">key</span>]
48: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000090" class="method-detail">
<a name="M000090"></a>
<div class="method-heading">
<a href="#M000090" class="method-signature">
<span class="method-name">[]=</span><span class="method-args">(key, value)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000090-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000090-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 50</span>
50: <span class="ruby-keyword kw">def</span> <span class="ruby-operator">[]=</span>(<span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>)
51: <span class="ruby-identifier">header</span>[<span class="ruby-identifier">key</span>] = <span class="ruby-identifier">value</span>
52: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000097" class="method-detail">
<a name="M000097"></a>
<div class="method-heading">
<a href="#M000097" class="method-signature">
<span class="method-name">close</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000097-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000097-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 122</span>
122: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">close</span>
123: <span class="ruby-identifier">body</span>.<span class="ruby-identifier">close</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:close</span>)
124: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000092" class="method-detail">
<a name="M000092"></a>
<div class="method-heading">
<a href="#M000092" class="method-signature">
<span class="method-name">delete_cookie</span><span class="method-args">(key, value={})</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000092-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000092-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 81</span>
81: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">delete_cookie</span>(<span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>={})
82: <span class="ruby-keyword kw">unless</span> <span class="ruby-constant">Array</span> <span class="ruby-operator">===</span> <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>]
83: <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>] = [<span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>]].<span class="ruby-identifier">compact</span>
84: <span class="ruby-keyword kw">end</span>
85:
86: <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>].<span class="ruby-identifier">reject!</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">cookie</span><span class="ruby-operator">|</span>
87: <span class="ruby-identifier">cookie</span> <span class="ruby-operator">=~</span> <span class="ruby-node">/\A#{Utils.escape(key)}=/</span>
88: }
89:
90: <span class="ruby-identifier">set_cookie</span>(<span class="ruby-identifier">key</span>,
91: {<span class="ruby-identifier">:value</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-value str">''</span>, <span class="ruby-identifier">:path</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-keyword kw">nil</span>, <span class="ruby-identifier">:domain</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-keyword kw">nil</span>,
92: <span class="ruby-identifier">:expires</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-constant">Time</span>.<span class="ruby-identifier">at</span>(<span class="ruby-value">0</span>) }.<span class="ruby-identifier">merge</span>(<span class="ruby-identifier">value</span>))
93: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000095" class="method-detail">
<a name="M000095"></a>
<div class="method-heading">
<a href="#M000095" class="method-signature">
<span class="method-name">each</span><span class="method-args">(&amp;callback)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000095-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000095-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 109</span>
109: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">each</span>(<span class="ruby-operator">&amp;</span><span class="ruby-identifier">callback</span>)
110: <span class="ruby-ivar">@body</span>.<span class="ruby-identifier">each</span>(<span class="ruby-operator">&amp;</span><span class="ruby-identifier">callback</span>)
111: <span class="ruby-ivar">@writer</span> = <span class="ruby-identifier">callback</span>
112: <span class="ruby-ivar">@block</span>.<span class="ruby-identifier">call</span>(<span class="ruby-keyword kw">self</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@block</span>
113: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000098" class="method-detail">
<a name="M000098"></a>
<div class="method-heading">
<a href="#M000098" class="method-signature">
<span class="method-name">empty?</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000098-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000098-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 126</span>
126: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">empty?</span>
127: <span class="ruby-ivar">@block</span> <span class="ruby-operator">==</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-ivar">@body</span>.<span class="ruby-identifier">empty?</span>
128: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000093" class="method-detail">
<a name="M000093"></a>
<div class="method-heading">
<a href="#M000093" class="method-signature">
<span class="method-name">finish</span><span class="method-args">(&amp;block)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000093-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000093-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 96</span>
96: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">finish</span>(<span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
97: <span class="ruby-ivar">@block</span> = <span class="ruby-identifier">block</span>
98:
99: <span class="ruby-keyword kw">if</span> [<span class="ruby-value">204</span>, <span class="ruby-value">304</span>].<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>)
100: <span class="ruby-identifier">header</span>.<span class="ruby-identifier">delete</span> <span class="ruby-value str">&quot;Content-Type&quot;</span>
101: [<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>, <span class="ruby-identifier">header</span>.<span class="ruby-identifier">to_hash</span>, []]
102: <span class="ruby-keyword kw">else</span>
103: <span class="ruby-identifier">header</span>[<span class="ruby-value str">&quot;Content-Length&quot;</span>] <span class="ruby-operator">||=</span> <span class="ruby-ivar">@length</span>.<span class="ruby-identifier">to_s</span>
104: [<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>, <span class="ruby-identifier">header</span>.<span class="ruby-identifier">to_hash</span>, <span class="ruby-keyword kw">self</span>]
105: <span class="ruby-keyword kw">end</span>
106: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000091" class="method-detail">
<a name="M000091"></a>
<div class="method-heading">
<a href="#M000091" class="method-signature">
<span class="method-name">set_cookie</span><span class="method-args">(key, value)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000091-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000091-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 54</span>
54: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">set_cookie</span>(<span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>)
55: <span class="ruby-keyword kw">case</span> <span class="ruby-identifier">value</span>
56: <span class="ruby-keyword kw">when</span> <span class="ruby-constant">Hash</span>
57: <span class="ruby-identifier">domain</span> = <span class="ruby-value str">&quot;; domain=&quot;</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:domain</span>] <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:domain</span>]
58: <span class="ruby-identifier">path</span> = <span class="ruby-value str">&quot;; path=&quot;</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:path</span>] <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:path</span>]
59: <span class="ruby-comment cmt"># According to RFC 2109, we need dashes here.</span>
60: <span class="ruby-comment cmt"># N.B.: cgi.rb uses spaces...</span>
61: <span class="ruby-identifier">expires</span> = <span class="ruby-value str">&quot;; expires=&quot;</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:expires</span>].<span class="ruby-identifier">clone</span>.<span class="ruby-identifier">gmtime</span>.
62: <span class="ruby-identifier">strftime</span>(<span class="ruby-value str">&quot;%a, %d-%b-%Y %H:%M:%S GMT&quot;</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:expires</span>]
63: <span class="ruby-identifier">secure</span> = <span class="ruby-value str">&quot;; secure&quot;</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:secure</span>]
64: <span class="ruby-identifier">value</span> = <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:value</span>]
65: <span class="ruby-keyword kw">end</span>
66: <span class="ruby-identifier">value</span> = [<span class="ruby-identifier">value</span>] <span class="ruby-keyword kw">unless</span> <span class="ruby-constant">Array</span> <span class="ruby-operator">===</span> <span class="ruby-identifier">value</span>
67: <span class="ruby-identifier">cookie</span> = <span class="ruby-constant">Utils</span>.<span class="ruby-identifier">escape</span>(<span class="ruby-identifier">key</span>) <span class="ruby-operator">+</span> <span class="ruby-value str">&quot;=&quot;</span> <span class="ruby-operator">+</span>
68: <span class="ruby-identifier">value</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">v</span><span class="ruby-operator">|</span> <span class="ruby-constant">Utils</span>.<span class="ruby-identifier">escape</span> <span class="ruby-identifier">v</span> }.<span class="ruby-identifier">join</span>(<span class="ruby-value str">&quot;&amp;&quot;</span>) <span class="ruby-operator">+</span>
69: <span class="ruby-node">&quot;#{domain}#{path}#{expires}#{secure}&quot;</span>
70:
71: <span class="ruby-keyword kw">case</span> <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>]
72: <span class="ruby-keyword kw">when</span> <span class="ruby-constant">Array</span>
73: <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>] <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">cookie</span>
74: <span class="ruby-keyword kw">when</span> <span class="ruby-constant">String</span>
75: <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>] = [<span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>], <span class="ruby-identifier">cookie</span>]
76: <span class="ruby-keyword kw">when</span> <span class="ruby-keyword kw">nil</span>
77: <span class="ruby-keyword kw">self</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>] = <span class="ruby-identifier">cookie</span>
78: <span class="ruby-keyword kw">end</span>
79: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000094" class="method-detail">
<a name="M000094"></a>
<div class="method-heading">
<span class="method-name">to_a</span><span class="method-args">(&amp;block)</span>
</div>
<div class="method-description">
<p>
Alias for <a href="Response.html#M000093">finish</a>
</p>
</div>
</div>
<div id="method-M000096" class="method-detail">
<a name="M000096"></a>
<div class="method-heading">
<a href="#M000096" class="method-signature">
<span class="method-name">write</span><span class="method-args">(str)</span>
</a>
</div>
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<div class="method-source-code" id="M000096-source">
<pre>
<span class="ruby-comment cmt"># File lib/rack/response.rb, line 115</span>
115: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">write</span>(<span class="ruby-identifier">str</span>)
116: <span class="ruby-identifier">s</span> = <span class="ruby-identifier">str</span>.<span class="ruby-identifier">to_s</span>
117: <span class="ruby-ivar">@length</span> <span class="ruby-operator">+=</span> <span class="ruby-identifier">s</span>.<span class="ruby-identifier">size</span>
118: <span class="ruby-ivar">@writer</span>.<span class="ruby-identifier">call</span> <span class="ruby-identifier">s</span>
119: <span class="ruby-identifier">str</span>
120: <span class="ruby-keyword kw">end</span>
</pre>
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