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<title>normalize_params (lib/rack/utils.rb)</title>
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<pre><span class="ruby-comment cmt"># File lib/rack/utils.rb, line 129</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">normalize_params</span>(<span class="ruby-identifier">params</span>, <span class="ruby-identifier">name</span>, <span class="ruby-identifier">v</span> = <span class="ruby-keyword kw">nil</span>)
<span class="ruby-identifier">name</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp re">%r(\A[\[\]]*([^\[\]]+)\]*)</span>
<span class="ruby-identifier">k</span> = <span class="ruby-identifier">$1</span> <span class="ruby-operator">||</span> <span class="ruby-value str">''</span>
<span class="ruby-identifier">after</span> = <span class="ruby-identifier">$'</span> <span class="ruby-operator">||</span> <span class="ruby-value str">''</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">k</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">after</span> <span class="ruby-operator">==</span> <span class="ruby-value str">""</span>
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-identifier">v</span>
<span class="ruby-keyword kw">elsif</span> <span class="ruby-identifier">after</span> <span class="ruby-operator">==</span> <span class="ruby-value str">"["</span>
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">name</span>] = <span class="ruby-identifier">v</span>
<span class="ruby-keyword kw">elsif</span> <span class="ruby-identifier">after</span> <span class="ruby-operator">==</span> <span class="ruby-value str">"[]"</span>
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] <span class="ruby-operator">||=</span> []
<span class="ruby-identifier">raise</span> <span class="ruby-constant">ParameterTypeError</span>, <span class="ruby-node">"expected Array (got #{params[k].class.name}) for param `#{k}'"</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>].<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Array</span>)
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] <span class="ruby-operator"><<</span> <span class="ruby-identifier">v</span>
<span class="ruby-keyword kw">elsif</span> <span class="ruby-identifier">after</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp re">%r(^\[\]\[([^\[\]]+)\]$)</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">after</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp re">%r(^\[\](.+)$)</span>
<span class="ruby-identifier">child_key</span> = <span class="ruby-identifier">$1</span>
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] <span class="ruby-operator">||=</span> []
<span class="ruby-identifier">raise</span> <span class="ruby-constant">ParameterTypeError</span>, <span class="ruby-node">"expected Array (got #{params[k].class.name}) for param `#{k}'"</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>].<span class="ruby-identifier">is_a?</span>(<span class="ruby-constant">Array</span>)
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">params_hash_type?</span>(<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>].<span class="ruby-identifier">last</span>) <span class="ruby-operator">&&</span> <span class="ruby-operator">!</span><span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>].<span class="ruby-identifier">last</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">child_key</span>)
<span class="ruby-identifier">normalize_params</span>(<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>].<span class="ruby-identifier">last</span>, <span class="ruby-identifier">child_key</span>, <span class="ruby-identifier">v</span>)
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] <span class="ruby-operator"><<</span> <span class="ruby-identifier">normalize_params</span>(<span class="ruby-identifier">params</span>.<span class="ruby-identifier">class</span>.<span class="ruby-identifier">new</span>, <span class="ruby-identifier">child_key</span>, <span class="ruby-identifier">v</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] <span class="ruby-operator">||=</span> <span class="ruby-identifier">params</span>.<span class="ruby-identifier">class</span>.<span class="ruby-identifier">new</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">ParameterTypeError</span>, <span class="ruby-node">"expected Hash (got #{params[k].class.name}) for param `#{k}'"</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">params_hash_type?</span>(<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>])
<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>] = <span class="ruby-identifier">normalize_params</span>(<span class="ruby-identifier">params</span>[<span class="ruby-identifier">k</span>], <span class="ruby-identifier">after</span>, <span class="ruby-identifier">v</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">return</span> <span class="ruby-identifier">params</span>
<span class="ruby-keyword kw">end</span></pre>
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