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<title>class Rack::ShowStatus - rack-2.2.10 Documentation</title>
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<h1 id="class-Rack::ShowStatus" class="class">
class Rack::ShowStatus
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<section class="description">
<p><a href="ShowStatus.html"><code>Rack::ShowStatus</code></a> catches all empty responses and replaces them with a site explaining the error.</p>
<p>Additional details can be put into <code>rack.showstatus.detail</code> and will be shown as HTML. If such details exist, the error page is always rendered, even if the reply was not empty.</p>
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<pre><span class="ruby-comment"># File lib/rack/show_status.rb, line 14</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">app</span>)
<span class="ruby-ivar">@app</span> = <span class="ruby-identifier">app</span>
<span class="ruby-ivar">@template</span> = <span class="ruby-constant">ERB</span>.<span class="ruby-identifier">new</span>(<span class="ruby-constant">TEMPLATE</span>)
<span class="ruby-keyword">end</span></pre>
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<pre><span class="ruby-comment"># File lib/rack/show_status.rb, line 19</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">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span> = <span class="ruby-ivar">@app</span>.<span class="ruby-identifier">call</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">headers</span> = <span class="ruby-constant">Utils</span><span class="ruby-operator">::</span><span class="ruby-constant">HeaderHash</span>[<span class="ruby-identifier">headers</span>]
<span class="ruby-identifier">empty</span> = <span class="ruby-identifier">headers</span>[<span class="ruby-constant">CONTENT_LENGTH</span>].<span class="ruby-identifier">to_i</span> <span class="ruby-operator"><=</span> <span class="ruby-value">0</span>
<span class="ruby-comment"># client or server error, or explicit message</span>
<span class="ruby-keyword">if</span> (<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span> <span class="ruby-operator">>=</span> <span class="ruby-value">400</span> <span class="ruby-operator">&&</span> <span class="ruby-identifier">empty</span>) <span class="ruby-operator">||</span> <span class="ruby-identifier">env</span>[<span class="ruby-constant">RACK_SHOWSTATUS_DETAIL</span>]
<span class="ruby-comment"># This double assignment is to prevent an "unused variable" warning.</span>
<span class="ruby-comment"># Yes, it is dumb, but I don't like Ruby yelling at me.</span>
<span class="ruby-identifier">req</span> = <span class="ruby-identifier">req</span> = <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Request</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-identifier">message</span> = <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Utils</span><span class="ruby-operator">::</span><span class="ruby-constant">HTTP_STATUS_CODES</span>[<span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_i</span>] <span class="ruby-operator">||</span> <span class="ruby-identifier">status</span>.<span class="ruby-identifier">to_s</span>
<span class="ruby-comment"># This double assignment is to prevent an "unused variable" warning.</span>
<span class="ruby-comment"># Yes, it is dumb, but I don't like Ruby yelling at me.</span>
<span class="ruby-identifier">detail</span> = <span class="ruby-identifier">detail</span> = <span class="ruby-identifier">env</span>[<span class="ruby-constant">RACK_SHOWSTATUS_DETAIL</span>] <span class="ruby-operator">||</span> <span class="ruby-identifier">message</span>
<span class="ruby-identifier">body</span> = <span class="ruby-ivar">@template</span>.<span class="ruby-identifier">result</span>(<span class="ruby-identifier">binding</span>)
<span class="ruby-identifier">size</span> = <span class="ruby-identifier">body</span>.<span class="ruby-identifier">bytesize</span>
[<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>.<span class="ruby-identifier">merge</span>(<span class="ruby-constant">CONTENT_TYPE</span> <span class="ruby-operator">=></span> <span class="ruby-string">"text/html"</span>, <span class="ruby-constant">CONTENT_LENGTH</span> <span class="ruby-operator">=></span> <span class="ruby-identifier">size</span>.<span class="ruby-identifier">to_s</span>), [<span class="ruby-identifier">body</span>]]
<span class="ruby-keyword">else</span>
[<span class="ruby-identifier">status</span>, <span class="ruby-identifier">headers</span>, <span class="ruby-identifier">body</span>]
<span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
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