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  <title>delete_cookie_header! (lib/rack/utils.rb)</title>
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  <pre><span class="ruby-comment cmt"># File lib/rack/utils.rb, line 327</span>
    <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">delete_cookie_header!</span>(<span class="ruby-identifier">header</span>, <span class="ruby-identifier">key</span>, <span class="ruby-identifier">value</span> = {})
      <span class="ruby-keyword kw">case</span> <span class="ruby-identifier">header</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>]
      <span class="ruby-keyword kw">when</span> <span class="ruby-keyword kw">nil</span>, <span class="ruby-value str">''</span>
        <span class="ruby-identifier">cookies</span> = []
      <span class="ruby-keyword kw">when</span> <span class="ruby-constant">String</span>
        <span class="ruby-identifier">cookies</span> = <span class="ruby-identifier">header</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>].<span class="ruby-identifier">split</span>(<span class="ruby-value str">&quot;\n&quot;</span>)
      <span class="ruby-keyword kw">when</span> <span class="ruby-constant">Array</span>
        <span class="ruby-identifier">cookies</span> = <span class="ruby-identifier">header</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>]
      <span class="ruby-keyword kw">end</span>

      <span class="ruby-identifier">cookies</span>.<span class="ruby-identifier">reject!</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">cookie</span><span class="ruby-operator">|</span>
        <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:domain</span>]
          <span class="ruby-identifier">cookie</span> <span class="ruby-operator">=~</span> <span class="ruby-node">/\A#{escape(key)}=.*domain=#{value[:domain]}/</span>
        <span class="ruby-keyword kw">elsif</span> <span class="ruby-identifier">value</span>[<span class="ruby-identifier">:path</span>]
          <span class="ruby-identifier">cookie</span> <span class="ruby-operator">=~</span> <span class="ruby-node">/\A#{escape(key)}=.*path=#{value[:path]}/</span>
        <span class="ruby-keyword kw">else</span>
          <span class="ruby-identifier">cookie</span> <span class="ruby-operator">=~</span> <span class="ruby-node">/\A#{escape(key)}=/</span>
        <span class="ruby-keyword kw">end</span>
      }

      <span class="ruby-identifier">header</span>[<span class="ruby-value str">&quot;Set-Cookie&quot;</span>] = <span class="ruby-identifier">cookies</span>.<span class="ruby-identifier">join</span>(<span class="ruby-value str">&quot;\n&quot;</span>)

      <span class="ruby-identifier">set_cookie_header!</span>(<span class="ruby-identifier">header</span>, <span class="ruby-identifier">key</span>,
                 {<span class="ruby-identifier">:value</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-value str">''</span>, <span class="ruby-identifier">:path</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-keyword kw">nil</span>, <span class="ruby-identifier">:domain</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-keyword kw">nil</span>,
                   <span class="ruby-identifier">:max_age</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-value str">'0'</span>,
                   <span class="ruby-identifier">:expires</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-constant">Time</span>.<span class="ruby-identifier">at</span>(<span class="ruby-value">0</span>) }.<span class="ruby-identifier">merge</span>(<span class="ruby-identifier">value</span>))

      <span class="ruby-keyword kw">nil</span>
    <span class="ruby-keyword kw">end</span></pre>
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