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<h1 class="class">Rack::Utils::HeaderHash</h1>
<div id="description" class="description">
<p>A case-insensitive Hash that preserves the original case of a header when
set.</p>
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<span class="ruby-comment"># File lib/rack/utils.rb, line 477</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">hash</span>={})
<span class="ruby-constant">HeaderHash</span> <span class="ruby-operator">===</span> <span class="ruby-identifier">hash</span> <span class="ruby-operator">?</span> <span class="ruby-identifier">hash</span> <span class="ruby-operator">:</span> <span class="ruby-keyword">super</span>(<span class="ruby-identifier">hash</span>)
<span class="ruby-keyword">end</span></pre>
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<span class="ruby-comment"># File lib/rack/utils.rb, line 481</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">hash</span>={})
<span class="ruby-keyword">super</span>()
<span class="ruby-ivar">@names</span> = {}
<span class="ruby-identifier">hash</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span><span class="ruby-operator">|</span> <span class="ruby-keyword">self</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-identifier">v</span> }
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<span class="ruby-comment"># File lib/rack/utils.rb, line 499</span>
<span class="ruby-keyword">def</span> <span class="ruby-operator">[]</span>(<span class="ruby-identifier">k</span>)
<span class="ruby-keyword">super</span>(<span class="ruby-identifier">k</span>) <span class="ruby-operator">||</span> <span class="ruby-keyword">super</span>(<span class="ruby-ivar">@names</span>[<span class="ruby-identifier">k</span>.<span class="ruby-identifier">downcase</span>])
<span class="ruby-keyword">end</span></pre>
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<span class="ruby-comment"># File lib/rack/utils.rb, line 503</span>
<span class="ruby-keyword">def</span> <span class="ruby-operator">[]=</span>(<span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span>)
<span class="ruby-identifier">canonical</span> = <span class="ruby-identifier">k</span>.<span class="ruby-identifier">downcase</span>
<span class="ruby-identifier">delete</span> <span class="ruby-identifier">k</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@names</span>[<span class="ruby-identifier">canonical</span>] <span class="ruby-operator">&&</span> <span class="ruby-ivar">@names</span>[<span class="ruby-identifier">canonical</span>] <span class="ruby-operator">!=</span> <span class="ruby-identifier">k</span> <span class="ruby-comment"># .delete is expensive, don't invoke it unless necessary</span>
<span class="ruby-ivar">@names</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-ivar">@names</span>[<span class="ruby-identifier">canonical</span>] = <span class="ruby-identifier">k</span>
<span class="ruby-keyword">super</span> <span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span>
<span class="ruby-keyword">end</span></pre>
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<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 510</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">delete</span>(<span class="ruby-identifier">k</span>)
<span class="ruby-identifier">canonical</span> = <span class="ruby-identifier">k</span>.<span class="ruby-identifier">downcase</span>
<span class="ruby-identifier">result</span> = <span class="ruby-keyword">super</span> <span class="ruby-ivar">@names</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-identifier">canonical</span>)
<span class="ruby-ivar">@names</span>.<span class="ruby-identifier">delete_if</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">name</span>,<span class="ruby-operator">|</span> <span class="ruby-identifier">name</span>.<span class="ruby-identifier">downcase</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">canonical</span> }
<span class="ruby-identifier">result</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- delete-source -->
</div>
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<div id="each-method" class="method-detail ">
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<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 487</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">each</span>
<span class="ruby-keyword">super</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">yield</span>(<span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-value">:to_ary</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">v</span>.<span class="ruby-identifier">to_ary</span>.<span class="ruby-identifier">join</span>(<span class="ruby-string">"\n"</span>) <span class="ruby-operator">:</span> <span class="ruby-identifier">v</span>)
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- each-source -->
</div>
</div><!-- each-method -->
<div id="has_key-3F-method" class="method-detail method-alias">
<a name="method-i-has_key-3F"></a>
<div class="method-heading">
<span class="method-name">has_key?</span><span
class="method-args">(k)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="HeaderHash.html#method-i-include-3F">include?</a>
</div>
</div><!-- has_key-3F-method -->
<div id="include-3F-method" class="method-detail ">
<a name="method-i-include-3F"></a>
<div class="method-heading">
<span class="method-name">include?</span><span
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<div class="method-source-code" id="include-3F-source">
<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 517</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">include?</span>(<span class="ruby-identifier">k</span>)
<span class="ruby-ivar">@names</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">k</span>) <span class="ruby-operator">||</span> <span class="ruby-ivar">@names</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">k</span>.<span class="ruby-identifier">downcase</span>)
<span class="ruby-keyword">end</span></pre>
</div><!-- include-3F-source -->
</div>
<div class="aliases">
Also aliased as: <a href="HeaderHash.html#method-i-has_key-3F">has_key?</a>, <a href="HeaderHash.html#method-i-member-3F">member?</a>, <a href="HeaderHash.html#method-i-key-3F">key?</a>
</div>
</div><!-- include-3F-method -->
<div id="key-3F-method" class="method-detail method-alias">
<a name="method-i-key-3F"></a>
<div class="method-heading">
<span class="method-name">key?</span><span
class="method-args">(k)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="HeaderHash.html#method-i-include-3F">include?</a>
</div>
</div><!-- key-3F-method -->
<div id="member-3F-method" class="method-detail method-alias">
<a name="method-i-member-3F"></a>
<div class="method-heading">
<span class="method-name">member?</span><span
class="method-args">(k)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
</div>
<div class="aliases">
Alias for: <a href="HeaderHash.html#method-i-include-3F">include?</a>
</div>
</div><!-- member-3F-method -->
<div id="merge-method" class="method-detail ">
<a name="method-i-merge"></a>
<div class="method-heading">
<span class="method-name">merge</span><span
class="method-args">(other)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="merge-source">
<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 530</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">merge</span>(<span class="ruby-identifier">other</span>)
<span class="ruby-identifier">hash</span> = <span class="ruby-identifier">dup</span>
<span class="ruby-identifier">hash</span>.<span class="ruby-identifier">merge!</span> <span class="ruby-identifier">other</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- merge-source -->
</div>
</div><!-- merge-method -->
<div id="merge-21-method" class="method-detail ">
<a name="method-i-merge-21"></a>
<div class="method-heading">
<span class="method-name">merge!</span><span
class="method-args">(other)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="merge-21-source">
<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 525</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">merge!</span>(<span class="ruby-identifier">other</span>)
<span class="ruby-identifier">other</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span><span class="ruby-operator">|</span> <span class="ruby-keyword">self</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-identifier">v</span> }
<span class="ruby-keyword">self</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- merge-21-source -->
</div>
</div><!-- merge-21-method -->
<div id="replace-method" class="method-detail ">
<a name="method-i-replace"></a>
<div class="method-heading">
<span class="method-name">replace</span><span
class="method-args">(other)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="replace-source">
<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 535</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">replace</span>(<span class="ruby-identifier">other</span>)
<span class="ruby-identifier">clear</span>
<span class="ruby-identifier">other</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">k</span>, <span class="ruby-identifier">v</span><span class="ruby-operator">|</span> <span class="ruby-keyword">self</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-identifier">v</span> }
<span class="ruby-keyword">self</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- replace-source -->
</div>
</div><!-- replace-method -->
<div id="to_hash-method" class="method-detail ">
<a name="method-i-to_hash"></a>
<div class="method-heading">
<span class="method-name">to_hash</span><span
class="method-args">()</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="to_hash-source">
<pre>
<span class="ruby-comment"># File lib/rack/utils.rb, line 493</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier">to_hash</span>
<span class="ruby-identifier">hash</span> = {}
<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">k</span>,<span class="ruby-identifier">v</span><span class="ruby-operator">|</span> <span class="ruby-identifier">hash</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-identifier">v</span> }
<span class="ruby-identifier">hash</span>
<span class="ruby-keyword">end</span></pre>
</div><!-- to_hash-source -->
</div>
</div><!-- to_hash-method -->
</div><!-- public-instance-method-details -->
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