instiki/vendor/plugins/rack/doc/classes/Rack/ContentLength.html

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<title>Class: Rack::ContentLength</title>
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<td><strong>Class</strong></td>
<td class="class-name-in-header">Rack::ContentLength</td>
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<td><strong>In:</strong></td>
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<a href="../../files/lib/rack/content_length_rb.html">
lib/rack/content_length.rb
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Object
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<p>
Sets the Content-Length header on responses with fixed-length bodies.
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<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000081">call</a>&nbsp;&nbsp;
<a href="#M000080">new</a>&nbsp;&nbsp;
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<h3 class="section-bar">Public Class methods</h3>
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<span class="method-name">new</span><span class="method-args">(app)</span>
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<pre>
<span class="ruby-comment cmt"># File lib/rack/content_length.rb, line 4</span>
4: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">app</span>)
5: <span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span>
6: <span class="ruby-keyword kw">end</span>
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<span class="method-name">call</span><span class="method-args">(env)</span>
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<pre>
<span class="ruby-comment cmt"># File lib/rack/content_length.rb, line 8</span>
8: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
9: <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>)
10: <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>)
11:
12: <span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-constant">Utils</span><span class="ruby-operator">::</span><span class="ruby-constant">STATUS_WITH_NO_ENTITY_BODY</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">status</span>) <span class="ruby-operator">&amp;&amp;</span>
13: <span class="ruby-operator">!</span><span class="ruby-identifier">headers</span>[<span class="ruby-value str">'Content-Length'</span>] <span class="ruby-operator">&amp;&amp;</span>
14: <span class="ruby-operator">!</span><span class="ruby-identifier">headers</span>[<span class="ruby-value str">'Transfer-Encoding'</span>] <span class="ruby-operator">&amp;&amp;</span>
15: (<span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:to_ary</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:to_str</span>))
16:
17: <span class="ruby-identifier">body</span> = [<span class="ruby-identifier">body</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">:to_str</span>) <span class="ruby-comment cmt"># rack 0.4 compat</span>
18: <span class="ruby-identifier">length</span> = <span class="ruby-identifier">body</span>.<span class="ruby-identifier">to_ary</span>.<span class="ruby-identifier">inject</span>(<span class="ruby-value">0</span>) { <span class="ruby-operator">|</span><span class="ruby-identifier">len</span>, <span class="ruby-identifier">part</span><span class="ruby-operator">|</span> <span class="ruby-identifier">len</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">length</span> }
19: <span class="ruby-identifier">headers</span>[<span class="ruby-value str">'Content-Length'</span>] = <span class="ruby-identifier">length</span>.<span class="ruby-identifier">to_s</span>
20: <span class="ruby-keyword kw">end</span>
21:
22: [<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span>]
23: <span class="ruby-keyword kw">end</span>
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