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<title>class Rack::Head - rack-2.2.8 Documentation</title>

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  <h1 id="class-Rack::Head" class="class">
    class Rack::Head
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  <section class="description">
    
<p><a href="Head.html"><code>Rack::Head</code></a> returns an empty body for all HEAD requests. It leaves all other requests unchanged.</p>

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            <pre><span class="ruby-comment"># File lib/rack/head.rb, line 7</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/head.rb, line 11</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-keyword">if</span> <span class="ruby-identifier">env</span>[<span class="ruby-constant">REQUEST_METHOD</span>] <span class="ruby-operator">==</span> <span class="ruby-constant">HEAD</span>
    [
      <span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">BodyProxy</span>.<span class="ruby-identifier">new</span>([]) <span class="ruby-keyword">do</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>
    ]
  <span class="ruby-keyword">else</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>
<span class="ruby-keyword">end</span></pre>
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