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<title>cancel_url (OpenID::Server::CheckIDRequest)</title>
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<pre><span class="ruby-comment cmt"># File lib/openid/server.rb, line 804</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">cancel_url</span>
<span class="ruby-comment cmt"># Get the URL to cancel this request.</span>
<span class="ruby-comment cmt">#</span>
<span class="ruby-comment cmt"># Useful for creating a "Cancel" button on a web form so that</span>
<span class="ruby-comment cmt"># operation can be carried out directly without another trip</span>
<span class="ruby-comment cmt"># through the server.</span>
<span class="ruby-comment cmt">#</span>
<span class="ruby-comment cmt"># (Except you may want to make another trip through the</span>
<span class="ruby-comment cmt"># server so that it knows that the user did make a decision.)</span>
<span class="ruby-comment cmt">#</span>
<span class="ruby-comment cmt"># Returns a URL as a string.</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-operator">!</span><span class="ruby-ivar">@return_to</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">NoReturnToError</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@immediate</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">ArgumentError</span>.<span class="ruby-identifier">new</span>(<span class="ruby-value str">"Cancel is not an appropriate response to "</span> <span class="ruby-operator">+</span>
<span class="ruby-value str">"immediate mode requests."</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">response</span> = <span class="ruby-constant">Message</span>.<span class="ruby-identifier">new</span>(<span class="ruby-ivar">@message</span>.<span class="ruby-identifier">get_openid_namespace</span>)
<span class="ruby-identifier">response</span>.<span class="ruby-identifier">set_arg</span>(<span class="ruby-constant">OPENID_NS</span>, <span class="ruby-value str">'mode'</span>, <span class="ruby-value str">'cancel'</span>)
<span class="ruby-keyword kw">return</span> <span class="ruby-identifier">response</span>.<span class="ruby-identifier">to_url</span>(<span class="ruby-ivar">@return_to</span>)
<span class="ruby-keyword kw">end</span></pre>
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