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<title>call (Rack::MediaType)</title>
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<pre><span class="ruby-comment cmt"># File lib/sinatra/rack_accept.rb, line 112</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">call</span><span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">accept</span>, <span class="ruby-identifier">index</span> = <span class="ruby-identifier">env</span>[<span class="ruby-value str">'rack-accept.request'</span>], {}
<span class="ruby-comment cmt"># Skip everything when 'format' parameter is set in URL</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">env</span>[<span class="ruby-value str">'rack.request.query_hash'</span>][<span class="ruby-value str">"format"</span>]
<span class="ruby-identifier">media_type</span> = <span class="ruby-keyword kw">case</span> <span class="ruby-identifier">env</span>[<span class="ruby-value str">'rack.request.query_hash'</span>][<span class="ruby-value str">"format"</span>]
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'html'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">:html</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'xml'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">:xml</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'json'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">:json</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'gv'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">:gv</span>
<span class="ruby-keyword kw">when</span> <span class="ruby-value str">'png'</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">:png</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">index</span>[<span class="ruby-identifier">media_type</span>] = <span class="ruby-value">1</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">media_type</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-comment cmt"># Sort all requested media types in Accept using their 'q' values</span>
<span class="ruby-identifier">sorted_media_types</span> = <span class="ruby-identifier">accept</span>.<span class="ruby-identifier">media_type</span>.<span class="ruby-identifier">qvalues</span>.<span class="ruby-identifier">to_a</span>.<span class="ruby-identifier">sort</span>{ <span class="ruby-operator">|</span><span class="ruby-identifier">a</span>,<span class="ruby-identifier">b</span><span class="ruby-operator">|</span> <span class="ruby-identifier">a</span>[<span class="ruby-value">1</span>]<span class="ruby-operator"><=></span><span class="ruby-identifier">b</span>[<span class="ruby-value">1</span>] }.<span class="ruby-identifier">collect</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">t</span><span class="ruby-operator">|</span> <span class="ruby-identifier">t</span>.<span class="ruby-identifier">first</span> }
<span class="ruby-comment cmt"># If Accept header is missing or is empty, fallback to XML format</span>
<span class="ruby-identifier">sorted_media_types</span> <span class="ruby-operator"><<</span> <span class="ruby-value str">'application/xml'</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">sorted_media_types</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-comment cmt"># Choose the right format with the media type according to the priority</span>
<span class="ruby-constant">ACCEPTED_MEDIA_TYPES</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">format</span>, <span class="ruby-identifier">definition</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">definition</span>[<span class="ruby-identifier">:match</span>].<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">media_type</span><span class="ruby-operator">|</span>
<span class="ruby-keyword kw">break</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">index</span>[<span class="ruby-identifier">format</span>] = <span class="ruby-identifier">sorted_media_types</span>.<span class="ruby-identifier">index</span>(<span class="ruby-identifier">media_type</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt"># Reject formats with no/nil priority</span>
<span class="ruby-identifier">index</span>.<span class="ruby-identifier">reject!</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">format</span>, <span class="ruby-identifier">priority</span><span class="ruby-operator">|</span> <span class="ruby-keyword kw">not</span> <span class="ruby-identifier">priority</span> }
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt">#puts sorted_media_types.inspect</span>
<span class="ruby-comment cmt">#puts index.inspect</span>
<span class="ruby-comment cmt"># If after all we don't have any matching format assume that client has</span>
<span class="ruby-comment cmt"># requested unknown/wrong media type and throw an 406 error with no body</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">index</span>.<span class="ruby-identifier">keys</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">response</span> = <span class="ruby-value">406</span>, {}, <span class="ruby-value str">""</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">env</span>[<span class="ruby-value str">'rack-accept.formats'</span>] = <span class="ruby-identifier">index</span>
<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">response</span> = <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-keyword kw">end</span>
[<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">response</span>]
<span class="ruby-keyword kw">end</span></pre>
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