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<pre><span class="ruby-comment cmt"># File lib/rack/utils.rb, line 660</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">clean_path_info</span>(<span class="ruby-identifier">path_info</span>)
<span class="ruby-identifier">parts</span> = <span class="ruby-identifier">path_info</span>.<span class="ruby-identifier">split</span> <span class="ruby-constant">PATH_SEPS</span>
<span class="ruby-identifier">clean</span> = []
<span class="ruby-identifier">parts</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">part</span><span class="ruby-operator">|</span>
<span class="ruby-keyword kw">next</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">part</span>.<span class="ruby-identifier">empty?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">part</span> <span class="ruby-operator">==</span> <span class="ruby-value str">'.'</span>
<span class="ruby-identifier">part</span> <span class="ruby-operator">==</span> <span class="ruby-value str">'..'</span> <span class="ruby-operator">?</span> <span class="ruby-identifier">clean</span>.<span class="ruby-identifier">pop</span> <span class="ruby-operator">:</span> <span class="ruby-identifier">clean</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">part</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">clean</span>.<span class="ruby-identifier">unshift</span> <span class="ruby-value str">'/'</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">parts</span>.<span class="ruby-identifier">empty?</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">parts</span>.<span class="ruby-identifier">first</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-operator">::</span><span class="ruby-constant">File</span>.<span class="ruby-identifier">join</span>(<span class="ruby-operator">*</span><span class="ruby-identifier">clean</span>)
<span class="ruby-keyword kw">end</span></pre>
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