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PODeep link into a Facebook canvas app
 

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    <p>I am embedding a Facebook app <code>https://example.com</code> into the Facebook app canvas so that it is available at <code>https://apps.facebook.com/EXAMPLE</code> . My application sends notification emails that contain links like <code>https://example.com/messages/123</code> and that should open the page embedded into the Facebook canvas. How do I achieve this? My current thoughts:</p> <ol> <li>User opens <code>https://example.com/messages/123</code></li> <li>Application checks for <a href="https://developers.facebook.com/docs/authentication/signed_request/" rel="nofollow"><code>signed_request</code> parameter</a></li> <li>Application redirects user to <code>https://apps.facebook.com/EXAMPLE/?requested_page=/messages/123</code></li> <li>Application checks for <code>requested_page</code> parameter and redirects to this page</li> <li>User sees <code>https://example.com/messages/123</code> URL and is embedded into canvas</li> </ol> <p>Is there a better pattern out there to get this working?</p> <p><strong>My final working solution (with Ruby on Rails)</strong></p> <ol> <li>User opens <code>https://example.com/messages/123</code></li> <li><p>Application checks on client-side if app is embedded in canvas:</p> <pre><code>if(window == top){ top.location = "https://apps.facebook.com/#{Settings.facebook.app_id}#{request.fullpath}"; } </code></pre></li> <li><p>User is redirected to <code>https://apps.facebook.com/EXAMPLE/messages/123</code></p></li> <li>Application middleware converts <code>POST</code> into <code>GET</code> if <code>signed_request</code> is present (code and idea borrowed from <a href="https://github.com/dekart/facebooker2/blob/master/lib/facebooker2/rack/post_canvas.rb" rel="nofollow">https://github.com/dekart/facebooker2/blob/master/lib/facebooker2/rack/post_canvas.rb</a>)</li> <li><p>Application parses <code>signed_request</code> with fb_graph gem</p> <pre><code>FbGraph::Auth.new(app_id, app_secret, :signed_request =&gt; params[:signed_request]) </code></pre></li> </ol>
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