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<title>class Rack::URLMap - rack-2.2.8 Documentation</title>
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<li ><a href="#method-c-new">::new</a>
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<h1 id="class-Rack::URLMap" class="class">
class Rack::URLMap
</h1>
<section class="description">
<p><a href="URLMap.html"><code>Rack::URLMap</code></a> takes a hash mapping urls or paths to apps, and dispatches accordingly. Support for HTTP/1.1 host names exists if the URLs start with <code>http://</code> or <code>https://</code>.</p>
<p><a href="URLMap.html"><code>URLMap</code></a> modifies the SCRIPT_NAME and PATH_INFO such that the part relevant for dispatch is in the SCRIPT_NAME, and the rest in the PATH_INFO. This should be taken care of when you need to reconstruct the URL in order to create links.</p>
<p><a href="URLMap.html"><code>URLMap</code></a> dispatches in such a way that the longest paths are tried first, since they are most specific.</p>
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<section id="5Buntitled-5D" class="documentation-section">
<section id="public-class-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Class Methods</h3>
</header>
<div id="method-c-new" class="method-detail ">
<div class="method-heading">
<span class="method-name">new</span><span
class="method-args">(map = {})</span>
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<div class="method-description">
<div class="method-source-code" id="new-source">
<pre><span class="ruby-comment"># File lib/rack/urlmap.rb, line 19</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">map</span> = {})
<span class="ruby-identifier">remap</span>(<span class="ruby-identifier">map</span>)
<span class="ruby-keyword">end</span></pre>
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<section id="public-instance-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Public Instance Methods</h3>
</header>
<div id="method-i-call" class="method-detail ">
<div class="method-heading">
<span class="method-name">call</span><span
class="method-args">(env)</span>
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</div>
<div class="method-description">
<div class="method-source-code" id="call-source">
<pre><span class="ruby-comment"># File lib/rack/urlmap.rb, line 46</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">path</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>]
<span class="ruby-identifier">script_name</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">SCRIPT_NAME</span>]
<span class="ruby-identifier">http_host</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">HTTP_HOST</span>]
<span class="ruby-identifier">server_name</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">SERVER_NAME</span>]
<span class="ruby-identifier">server_port</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">SERVER_PORT</span>]
<span class="ruby-identifier">is_same_server</span> = <span class="ruby-identifier">casecmp?</span>(<span class="ruby-identifier">http_host</span>, <span class="ruby-identifier">server_name</span>) <span class="ruby-operator">||</span>
<span class="ruby-identifier">casecmp?</span>(<span class="ruby-identifier">http_host</span>, <span class="ruby-node">"#{server_name}:#{server_port}"</span>)
<span class="ruby-identifier">is_host_known</span> = <span class="ruby-ivar">@known_hosts</span>.<span class="ruby-identifier">include?</span> <span class="ruby-identifier">http_host</span>
<span class="ruby-ivar">@mapping</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">host</span>, <span class="ruby-identifier">location</span>, <span class="ruby-identifier">match</span>, <span class="ruby-identifier">app</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">unless</span> <span class="ruby-identifier">casecmp?</span>(<span class="ruby-identifier">http_host</span>, <span class="ruby-identifier">host</span>) \
<span class="ruby-operator">||</span> <span class="ruby-identifier">casecmp?</span>(<span class="ruby-identifier">server_name</span>, <span class="ruby-identifier">host</span>) \
<span class="ruby-operator">||</span> (<span class="ruby-operator">!</span><span class="ruby-identifier">host</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">is_same_server</span>) \
<span class="ruby-operator">||</span> (<span class="ruby-operator">!</span><span class="ruby-identifier">host</span> <span class="ruby-operator">&&</span> <span class="ruby-operator">!</span><span class="ruby-identifier">is_host_known</span>) <span class="ruby-comment"># If we don't have a matching host, default to the first without a specified host</span>
<span class="ruby-keyword">next</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">next</span> <span class="ruby-keyword">unless</span> <span class="ruby-identifier">m</span> = <span class="ruby-identifier">match</span>.<span class="ruby-identifier">match</span>(<span class="ruby-identifier">path</span>.<span class="ruby-identifier">to_s</span>)
<span class="ruby-identifier">rest</span> = <span class="ruby-identifier">m</span>[<span class="ruby-value">1</span>]
<span class="ruby-keyword">next</span> <span class="ruby-keyword">unless</span> <span class="ruby-operator">!</span><span class="ruby-identifier">rest</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">rest</span>.<span class="ruby-identifier">empty?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">rest</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">==</span> <span class="ruby-value">?/</span>
<span class="ruby-identifier">env</span>[<span class="ruby-constant">SCRIPT_NAME</span>] = (<span class="ruby-identifier">script_name</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">location</span>)
<span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>] = <span class="ruby-identifier">rest</span>
<span class="ruby-keyword">return</span> <span class="ruby-identifier">app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword">end</span>
[<span class="ruby-value">404</span>, { <span class="ruby-constant">CONTENT_TYPE</span> <span class="ruby-operator">=></span> <span class="ruby-string">"text/plain"</span>, <span class="ruby-string">"X-Cascade"</span> <span class="ruby-operator">=></span> <span class="ruby-string">"pass"</span> }, [<span class="ruby-node">"Not Found: #{path}"</span>]]
<span class="ruby-keyword">ensure</span>
<span class="ruby-identifier">env</span>[<span class="ruby-constant">PATH_INFO</span>] = <span class="ruby-identifier">path</span>
<span class="ruby-identifier">env</span>[<span class="ruby-constant">SCRIPT_NAME</span>] = <span class="ruby-identifier">script_name</span>
<span class="ruby-keyword">end</span></pre>
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<div id="method-i-remap" class="method-detail ">
<div class="method-heading">
<span class="method-name">remap</span><span
class="method-args">(map)</span>
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<div class="method-description">
<div class="method-source-code" id="remap-source">
<pre><span class="ruby-comment"># File lib/rack/urlmap.rb, line 23</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">remap</span>(<span class="ruby-identifier">map</span>)
<span class="ruby-ivar">@known_hosts</span> = <span class="ruby-constant">Set</span>[]
<span class="ruby-ivar">@mapping</span> = <span class="ruby-identifier">map</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">location</span>, <span class="ruby-identifier">app</span><span class="ruby-operator">|</span>
<span class="ruby-keyword">if</span> <span class="ruby-identifier">location</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp">%r{\Ahttps?://(.*?)(/.*)}</span>
<span class="ruby-identifier">host</span>, <span class="ruby-identifier">location</span> = <span class="ruby-node">$1</span>, <span class="ruby-node">$2</span>
<span class="ruby-ivar">@known_hosts</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">host</span>
<span class="ruby-keyword">else</span>
<span class="ruby-identifier">host</span> = <span class="ruby-keyword">nil</span>
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">unless</span> <span class="ruby-identifier">location</span>[<span class="ruby-value">0</span>] <span class="ruby-operator">==</span> <span class="ruby-value">?/</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">ArgumentError</span>, <span class="ruby-string">"paths need to start with /"</span>
<span class="ruby-keyword">end</span>
<span class="ruby-identifier">location</span> = <span class="ruby-identifier">location</span>.<span class="ruby-identifier">chomp</span>(<span class="ruby-string">'/'</span>)
<span class="ruby-identifier">match</span> = <span class="ruby-constant">Regexp</span>.<span class="ruby-identifier">new</span>(<span class="ruby-node">"^#{Regexp.quote(location).gsub('/', '/+')}(.*)"</span>, <span class="ruby-constant">Regexp</span><span class="ruby-operator">::</span><span class="ruby-constant">NOENCODING</span>)
[<span class="ruby-identifier">host</span>, <span class="ruby-identifier">location</span>, <span class="ruby-identifier">match</span>, <span class="ruby-identifier">app</span>]
}.<span class="ruby-identifier">sort_by</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span>(<span class="ruby-identifier">host</span>, <span class="ruby-identifier">location</span>, <span class="ruby-identifier">_</span>, <span class="ruby-identifier">_</span>)<span class="ruby-operator">|</span>
[<span class="ruby-identifier">host</span> <span class="ruby-operator">?</span> <span class="ruby-operator">-</span><span class="ruby-identifier">host</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">:</span> <span class="ruby-constant">Float</span><span class="ruby-operator">::</span><span class="ruby-constant">INFINITY</span>, <span class="ruby-operator">-</span><span class="ruby-identifier">location</span>.<span class="ruby-identifier">size</span>]
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
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</section>
<section id="private-instance-5Buntitled-5D-method-details" class="method-section">
<header>
<h3>Private Instance Methods</h3>
</header>
<div id="method-i-casecmp-3F" class="method-detail ">
<div class="method-heading">
<span class="method-name">casecmp?</span><span
class="method-args">(v1, v2)</span>
<span class="method-click-advice">click to toggle source</span>
</div>
<div class="method-description">
<div class="method-source-code" id="casecmp-3F-source">
<pre><span class="ruby-comment"># File lib/rack/urlmap.rb, line 85</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">casecmp?</span>(<span class="ruby-identifier">v1</span>, <span class="ruby-identifier">v2</span>)
<span class="ruby-comment"># if both nil, or they're the same string</span>
<span class="ruby-keyword">return</span> <span class="ruby-keyword">true</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">v1</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">v2</span>
<span class="ruby-comment"># if either are nil... (but they're not the same)</span>
<span class="ruby-keyword">return</span> <span class="ruby-keyword">false</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">v1</span>.<span class="ruby-identifier">nil?</span>
<span class="ruby-keyword">return</span> <span class="ruby-keyword">false</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">v2</span>.<span class="ruby-identifier">nil?</span>
<span class="ruby-comment"># otherwise check they're not case-insensitive the same</span>
<span class="ruby-identifier">v1</span>.<span class="ruby-identifier">casecmp</span>(<span class="ruby-identifier">v2</span>).<span class="ruby-identifier">zero?</span>
<span class="ruby-keyword">end</span></pre>
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