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  <title>call (Rack::ContentLength)</title>
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  <pre><span class="ruby-comment cmt"># File lib/rack/content_length.rb, line 14</span>
    <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">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">new</span>(<span class="ruby-identifier">headers</span>)

      <span class="ruby-keyword kw">if</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-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-value str">'Transfer-Encoding'</span>] <span class="ruby-operator">&amp;&amp;</span>
         <span class="ruby-identifier">body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:to_ary</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">bytesize</span>(<span class="ruby-identifier">part</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 kw">do</span>
          <span class="ruby-identifier">obody</span>.<span class="ruby-identifier">close</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">obody</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:close</span>)
        <span class="ruby-keyword kw">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 kw">end</span>

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