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<title>class Rack::ContentLength - rack-2.2.22 Documentation</title>

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  <h1 id="class-Rack::ContentLength" class="class">
    class Rack::ContentLength
  </h1>

<section class="description">
    
<p>Sets the Content-Length header on responses that do not specify a Content-Length or Transfer-Encoding header.  Note that this does not fix responses that have an invalid Content-Length header specified.</p>

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            <pre><span class="ruby-comment"># File lib/rack/content_length.rb, line 12</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">app</span>)
  <span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span>
<span class="ruby-keyword">end</span></pre>
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            <pre><span class="ruby-comment"># File lib/rack/content_length.rb, line 16</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">call</span>(<span class="ruby-identifier">env</span>)
  <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>)
  <span class="ruby-identifier">headers</span> = <span class="ruby-constant">HeaderHash</span>[<span class="ruby-identifier">headers</span>]

<span class="ruby-keyword">if</span> <span class="ruby-operator">!</span><span class="ruby-constant">STATUS_WITH_NO_ENTITY_BODY</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>) <span class="ruby-operator">&amp;&amp;</span>
     <span class="ruby-operator">!</span><span class="ruby-identifier">headers</span>[<span class="ruby-constant">CONTENT_LENGTH</span>] <span class="ruby-operator">&amp;&amp;</span>
     <span class="ruby-operator">!</span><span class="ruby-identifier">headers</span>[<span class="ruby-constant">TRANSFER_ENCODING</span>]

<span class="ruby-identifier">obody</span> = <span class="ruby-identifier">body</span>
    <span class="ruby-identifier">body</span>, <span class="ruby-identifier">length</span> = [], <span class="ruby-value">0</span>
    <span class="ruby-identifier">obody</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">body</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">part</span>; <span class="ruby-identifier">length</span> <span class="ruby-operator">+=</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">bytesize</span> }

<span class="ruby-identifier">body</span> = <span class="ruby-constant">BodyProxy</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">body</span>) <span class="ruby-keyword">do</span>
      <span class="ruby-identifier">obody</span>.<span class="ruby-identifier">close</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">obody</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:close</span>)
    <span class="ruby-keyword">end</span>

<span class="ruby-identifier">headers</span>[<span class="ruby-constant">CONTENT_LENGTH</span>] = <span class="ruby-identifier">length</span>.<span class="ruby-identifier">to_s</span>
  <span class="ruby-keyword">end</span>

[<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span>]
<span class="ruby-keyword">end</span></pre>
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