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<title>respond_to (Rack::RespondTo::Helpers)</title>
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<pre><span class="ruby-comment cmt"># File lib/sinatra/rack_accept.rb, line 74</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">respond_to</span>(<span class="ruby-operator">&</span><span class="ruby-identifier">block</span>)
<span class="ruby-identifier">wants</span> = {}
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">wants</span>.<span class="ruby-identifier">method_missing</span>(<span class="ruby-identifier">type</span>, <span class="ruby-operator">*</span><span class="ruby-identifier">args</span>, <span class="ruby-operator">&</span><span class="ruby-identifier">handler</span>)
<span class="ruby-keyword kw">self</span>[<span class="ruby-identifier">type</span>] = <span class="ruby-identifier">handler</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">yield</span> <span class="ruby-identifier">wants</span>
<span class="ruby-ivar">@media_type</span> = <span class="ruby-identifier">accepting_formats</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">reverse</span>.<span class="ruby-identifier">select</span> <span class="ruby-keyword kw">do</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-identifier">wants</span>.<span class="ruby-identifier">keys</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">format</span>) <span class="ruby-operator">==</span> <span class="ruby-keyword kw">true</span>
<span class="ruby-keyword kw">end</span>.<span class="ruby-identifier">first</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@media_type</span> <span class="ruby-keyword kw">and</span> <span class="ruby-ivar">@media_type</span>[<span class="ruby-value">0</span>]
<span class="ruby-ivar">@media_type</span> = <span class="ruby-ivar">@media_type</span>[<span class="ruby-value">0</span>]
<span class="ruby-identifier">headers</span> <span class="ruby-value str">'Content-Type'</span> =<span class="ruby-operator">></span> <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">MediaType</span><span class="ruby-operator">::</span><span class="ruby-constant">ACCEPTED_MEDIA_TYPES</span>[<span class="ruby-ivar">@media_type</span>][<span class="ruby-identifier">:return</span>]
<span class="ruby-identifier">wants</span>[<span class="ruby-ivar">@media_type</span>.<span class="ruby-identifier">to_sym</span>].<span class="ruby-identifier">call</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">wants</span>[<span class="ruby-ivar">@media_type</span>.<span class="ruby-identifier">to_sym</span>]
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">headers</span> <span class="ruby-value str">'Content-Type'</span> =<span class="ruby-operator">></span> <span class="ruby-keyword kw">nil</span>
<span class="ruby-identifier">status</span> <span class="ruby-value">406</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span></pre>
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