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<title>class Rack::Deflater::GzipStream - rack-2.2.10 Documentation</title>

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<main role="main" aria-labelledby="class-Rack::Deflater::GzipStream">
  <h1 id="class-Rack::Deflater::GzipStream" class="class">
    class Rack::Deflater::GzipStream
  </h1>

  <section class="description">
    
<p>Body class used for gzip encoded responses.</p>

  </section>

  
  <section id="5Buntitled-5D" class="documentation-section">
    

    

    

    

    
     <section id="public-class-5Buntitled-5D-method-details" class="method-section">
       <header>
         <h3>Public Class Methods</h3>
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      <div id="method-c-new" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">new</span><span
            class="method-args">(body, mtime, sync)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
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        <div class="method-description">
          
          <p>Initialize the gzip stream.  Arguments:</p>
<dl class="rdoc-list note-list"><dt>body 
<dd>
<p><a href="../Response.html"><code>Response</code></a> body to compress with gzip</p>
</dd><dt>mtime 
<dd>
<p>The modification time of the body, used to set the modification time in the gzip header.</p>
</dd><dt>sync 
<dd>
<p>Whether to flush each gzip chunk as soon as it is ready.</p>
</dd></dl>
          
          

          
          <div class="method-source-code" id="new-source">
            <pre><span class="ruby-comment"># File lib/rack/deflater.rb, line 85</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">body</span>, <span class="ruby-identifier">mtime</span>, <span class="ruby-identifier">sync</span>)
  <span class="ruby-ivar">@body</span> = <span class="ruby-identifier">body</span>
  <span class="ruby-ivar">@mtime</span> = <span class="ruby-identifier">mtime</span>
  <span class="ruby-ivar">@sync</span> = <span class="ruby-identifier">sync</span>
<span class="ruby-keyword">end</span></pre>
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     <section id="public-instance-5Buntitled-5D-method-details" class="method-section">
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         <h3>Public Instance Methods</h3>
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      <div id="method-i-close" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">close</span><span
            class="method-args">()</span>
          
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        <div class="method-description">
          
          <p>Close the original body if possible.</p>
          
          

          
          <div class="method-source-code" id="close-source">
            <pre><span class="ruby-comment"># File lib/rack/deflater.rb, line 114</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">close</span>
  <span class="ruby-ivar">@body</span>.<span class="ruby-identifier">close</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@body</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:close</span>)
<span class="ruby-keyword">end</span></pre>
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      <div id="method-i-each" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">each</span><span
            class="method-args">(&amp;block)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
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        <div class="method-description">
          
          <p>Yield gzip compressed strings to the given block.</p>
          
          

          
          <div class="method-source-code" id="each-source">
            <pre><span class="ruby-comment"># File lib/rack/deflater.rb, line 92</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">each</span>(<span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
  <span class="ruby-ivar">@writer</span> = <span class="ruby-identifier">block</span>
  <span class="ruby-identifier">gzip</span> = <span class="ruby-operator">::</span><span class="ruby-constant">Zlib</span><span class="ruby-operator">::</span><span class="ruby-constant">GzipWriter</span>.<span class="ruby-identifier">new</span>(<span class="ruby-keyword">self</span>)
  <span class="ruby-identifier">gzip</span>.<span class="ruby-identifier">mtime</span> = <span class="ruby-ivar">@mtime</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@mtime</span>
  <span class="ruby-ivar">@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-comment"># Skip empty strings, as they would result in no output,</span>
    <span class="ruby-comment"># and flushing empty parts would raise Zlib::BufError.</span>
    <span class="ruby-keyword">next</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">empty?</span>

    <span class="ruby-identifier">gzip</span>.<span class="ruby-identifier">write</span>(<span class="ruby-identifier">part</span>)
    <span class="ruby-identifier">gzip</span>.<span class="ruby-identifier">flush</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@sync</span>
  }
<span class="ruby-keyword">ensure</span>
  <span class="ruby-identifier">gzip</span>.<span class="ruby-identifier">close</span>
<span class="ruby-keyword">end</span></pre>
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      <div id="method-i-write" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">write</span><span
            class="method-args">(data)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
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        <div class="method-description">
          
          <p>Call the block passed to <a href="GzipStream.html#method-i-each"><code>each</code></a> with the the gzipped data.</p>
          
          

          
          <div class="method-source-code" id="write-source">
            <pre><span class="ruby-comment"># File lib/rack/deflater.rb, line 109</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">write</span>(<span class="ruby-identifier">data</span>)
  <span class="ruby-ivar">@writer</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">data</span>)
<span class="ruby-keyword">end</span></pre>
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