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<h1 class="class">Rack::Response</h1>
<div id="description" class="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#method-i-write">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>finish</tt>.
<tt>finish</tt> however can take a block inside which calls to
<tt>write</tt> are synchronous with the <a href="../Rack.html">Rack</a>
response.</p>
<p>Your application's <tt>call</tt> should end returning <a
href="Response.html#method-i-finish">Response#finish</a>.</p>
</div><!-- description -->
<div id="5Buntitled-5D" class="documentation-section">
<!-- Constants -->
<div id="constants-list" class="section">
<h3 class="section-header">Constants</h3>
<dl>
<dt><a name="CHUNKED">CHUNKED</a></dt>
<dd class="description"></dd>
<dt><a name="TRANSFER_ENCODING">TRANSFER_ENCODING</a></dt>
<dd class="description"></dd>
</dl>
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<!-- Attributes -->
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<h3 class="section-header">Attributes</h3>
<div id="body-attribute-method" class="method-detail">
<a name="body"></a>
<a name="body="></a>
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<span class="method-name">body</span><span
class="attribute-access-type">[RW]</span>
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<span class="method-name">header</span><span
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<a name="headers"></a>
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<span class="method-name">headers</span><span
class="attribute-access-type">[R]</span>
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<a name="length"></a>
<a name="length="></a>
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<span class="method-name">length</span><span
class="attribute-access-type">[RW]</span>
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</div>
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<a name="status"></a>
<a name="status="></a>
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<span class="method-name">status</span><span
class="attribute-access-type">[RW]</span>
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<div class="method-description">
</div>
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<!-- Methods -->
<div id="public-class-method-details" class="method-section section">
<h3 class="section-header">Public Class Methods</h3>
<div id="new-method" class="method-detail ">
<a name="method-c-new"></a>
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(body=[], status=200, header={})</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="new-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 25</span>
<span class="ruby-keyword">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-ivar">@status</span> = <span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>
<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-identifier">merge</span>(<span class="ruby-identifier">header</span>)
<span class="ruby-ivar">@chunked</span> = <span class="ruby-constant">CHUNKED</span> <span class="ruby-operator">==</span> <span class="ruby-ivar">@header</span>[<span class="ruby-constant">TRANSFER_ENCODING</span>]
<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"><<</span> <span class="ruby-identifier">x</span> }
<span class="ruby-ivar">@block</span> = <span class="ruby-keyword">nil</span>
<span class="ruby-ivar">@length</span> = <span class="ruby-value">0</span>
<span class="ruby-ivar">@body</span> = []
<span class="ruby-keyword">if</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span> <span class="ruby-value">:to_str</span>
<span class="ruby-identifier">write</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">to_str</span>
<span class="ruby-keyword">elsif</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:each</span>)
<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>
<span class="ruby-identifier">write</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">to_s</span>
}
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">TypeError</span>, <span class="ruby-string">"stringable or iterable required"</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">yield</span> <span class="ruby-keyword">self</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">block_given?</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- new-source -->
</div>
</div><!-- new-method -->
</div><!-- public-class-method-details -->
<div id="public-instance-method-details" class="method-section section">
<h3 class="section-header">Public Instance Methods</h3>
<div id="5B-5D-method" class="method-detail ">
<a name="method-i-5B-5D"></a>
<div class="method-heading">
<span class="method-name">[]</span><span
class="method-args">(key)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="5B-5D-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 52</span>
<span class="ruby-keyword">def</span> <span class="ruby-operator">[]</span>(<span class="ruby-identifier">key</span>)
<span class="ruby-identifier">header</span>[<span class="ruby-identifier">key</span>]
<span class="ruby-keyword">end</span></pre>
</div><!-- 5B-5D-source -->
</div>
</div><!-- 5B-5D-method -->
<div id="5B-5D-3D-method" class="method-detail ">
<a name="method-i-5B-5D-3D"></a>
<div class="method-heading">
<span class="method-name">[]=</span><span
class="method-args">(key, value)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="5B-5D-3D-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 56</span>
<span class="ruby-keyword">def</span> <span class="ruby-operator">[]=</span>(<span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>)
<span class="ruby-identifier">header</span>[<span class="ruby-identifier">key</span>] = <span class="ruby-identifier">value</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- 5B-5D-3D-source -->
</div>
</div><!-- 5B-5D-3D-method -->
<div id="close-method" class="method-detail ">
<a name="method-i-close"></a>
<div class="method-heading">
<span class="method-name">close</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="close-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 107</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">close</span>
<span class="ruby-identifier">body</span>.<span class="ruby-identifier">close</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:close</span>)
<span class="ruby-keyword">end</span></pre>
</div><!-- close-source -->
</div>
</div><!-- close-method -->
<div id="delete_cookie-method" class="method-detail ">
<a name="method-i-delete_cookie"></a>
<div class="method-heading">
<span class="method-name">delete_cookie</span><span
class="method-args">(key, value={})</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="delete_cookie-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 64</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">delete_cookie</span>(<span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>={})
<span class="ruby-constant">Utils</span>.<span class="ruby-identifier">delete_cookie_header!</span>(<span class="ruby-identifier">header</span>, <span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>)
<span class="ruby-keyword">end</span></pre>
</div><!-- delete_cookie-source -->
</div>
</div><!-- delete_cookie-method -->
<div id="each-method" class="method-detail ">
<a name="method-i-each"></a>
<div class="method-heading">
<span class="method-name">each</span><span
class="method-args">(&callback)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="each-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 88</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">each</span>(&<span class="ruby-identifier">callback</span>)
<span class="ruby-ivar">@body</span>.<span class="ruby-identifier">each</span>(&<span class="ruby-identifier">callback</span>)
<span class="ruby-ivar">@writer</span> = <span class="ruby-identifier">callback</span>
<span class="ruby-ivar">@block</span>.<span class="ruby-identifier">call</span>(<span class="ruby-keyword">self</span>) <span class="ruby-keyword">if</span> <span class="ruby-ivar">@block</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- each-source -->
</div>
</div><!-- each-method -->
<div id="empty-3F-method" class="method-detail ">
<a name="method-i-empty-3F"></a>
<div class="method-heading">
<span class="method-name">empty?</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="empty-3F-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 111</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">empty?</span>
<span class="ruby-ivar">@block</span> <span class="ruby-operator">==</span> <span class="ruby-keyword">nil</span> <span class="ruby-operator">&&</span> <span class="ruby-ivar">@body</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- empty-3F-source -->
</div>
</div><!-- empty-3F-method -->
<div id="finish-method" class="method-detail ">
<a name="method-i-finish"></a>
<div class="method-heading">
<span class="method-name">finish</span><span
class="method-args">(&block)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="finish-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 73</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">finish</span>(&<span class="ruby-identifier">block</span>)
<span class="ruby-ivar">@block</span> = <span class="ruby-identifier">block</span>
<span class="ruby-keyword">if</span> [<span class="ruby-value">204</span>, <span class="ruby-value">205</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>)
<span class="ruby-identifier">header</span>.<span class="ruby-identifier">delete</span> <span class="ruby-constant">CONTENT_TYPE</span>
<span class="ruby-identifier">header</span>.<span class="ruby-identifier">delete</span> <span class="ruby-constant">CONTENT_LENGTH</span>
<span class="ruby-identifier">close</span>
[<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>, <span class="ruby-identifier">header</span>, []]
<span class="ruby-keyword">else</span>
[<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>, <span class="ruby-identifier">header</span>, <span class="ruby-constant">BodyProxy</span>.<span class="ruby-identifier">new</span>(<span class="ruby-keyword">self</span>){}]
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- finish-source -->
</div>
<div class="aliases">
Also aliased as: <a href="Response.html#method-i-to_a">to_a</a>, <a href="Response.html#method-i-to_ary">to_ary</a>
</div>
</div><!-- finish-method -->
<div id="redirect-method" class="method-detail ">
<a name="method-i-redirect"></a>
<div class="method-heading">
<span class="method-name">redirect</span><span
class="method-args">(target, status=302)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="redirect-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 68</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">redirect</span>(<span class="ruby-identifier">target</span>, <span class="ruby-identifier">status</span>=<span class="ruby-value">302</span>)
<span class="ruby-keyword">self</span>.<span class="ruby-identifier">status</span> = <span class="ruby-identifier">status</span>
<span class="ruby-keyword">self</span>[<span class="ruby-string">"Location"</span>] = <span class="ruby-identifier">target</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- redirect-source -->
</div>
</div><!-- redirect-method -->
<div id="set_cookie-method" class="method-detail ">
<a name="method-i-set_cookie"></a>
<div class="method-heading">
<span class="method-name">set_cookie</span><span
class="method-args">(key, value)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="set_cookie-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 60</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">set_cookie</span>(<span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>)
<span class="ruby-constant">Utils</span>.<span class="ruby-identifier">set_cookie_header!</span>(<span class="ruby-identifier">header</span>, <span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span>)
<span class="ruby-keyword">end</span></pre>
</div><!-- set_cookie-source -->
</div>
</div><!-- set_cookie-method -->
<div id="to_a-method" class="method-detail method-alias">
<a name="method-i-to_a"></a>
<div class="method-heading">
<span class="method-name">to_a</span><span
class="method-args">(&block)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Response.html#method-i-finish">finish</a>
</div>
</div><!-- to_a-method -->
<div id="to_ary-method" class="method-detail method-alias">
<a name="method-i-to_ary"></a>
<div class="method-heading">
<span class="method-name">to_ary</span><span
class="method-args">(&block)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="Response.html#method-i-finish">finish</a>
</div>
</div><!-- to_ary-method -->
<div id="write-method" class="method-detail ">
<a name="method-i-write"></a>
<div class="method-heading">
<span class="method-name">write</span><span
class="method-args">(str)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<p>Append to body and update Content-Length.</p>
<p>NOTE: Do not mix <a href="Response.html#method-i-write">write</a> and
direct <a href="Response.html#attribute-i-body">body</a> access!</p>
<div class="method-source-code" id="write-source">
<pre>
<span class="ruby-comment"># File lib/rack/response.rb, line 98</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">write</span>(<span class="ruby-identifier">str</span>)
<span class="ruby-identifier">s</span> = <span class="ruby-identifier">str</span>.<span class="ruby-identifier">to_s</span>
<span class="ruby-ivar">@length</span> <span class="ruby-operator">+=</span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Utils</span>.<span class="ruby-identifier">bytesize</span>(<span class="ruby-identifier">s</span>) <span class="ruby-keyword">unless</span> <span class="ruby-ivar">@chunked</span>
<span class="ruby-ivar">@writer</span>.<span class="ruby-identifier">call</span> <span class="ruby-identifier">s</span>
<span class="ruby-identifier">header</span>[<span class="ruby-constant">CONTENT_LENGTH</span>] = <span class="ruby-ivar">@length</span>.<span class="ruby-identifier">to_s</span> <span class="ruby-keyword">unless</span> <span class="ruby-ivar">@chunked</span>
<span class="ruby-identifier">str</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- write-source -->
</div>
</div><!-- write-method -->
</div><!-- public-instance-method-details -->
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