title: Rails - session lost after returning from a submit (POST)
body: <p>I am integrating the Liberty Reserve shopping cart into my Rails application. Calling LR (with the fork submit) works perfectly and LR also redirects back to my page after the successful postings. But my session is lost when the app returns.</p>
  
  <p>The page looks as follows:</p>
  
  <pre><code>&lt;form action="https://sci.libertyreserve.com/en" method="GET"&gt;
  &lt;input type="hidden" name="lr_acc" value="XXXXX"&gt;
  &lt;input type="hidden" name="lr_store" value="XXX"&gt;
  &lt;input type="hidden" name="lr_merchant_ref" value="1"&gt;
  &lt;input type="submit" value="Liberty Reserve"/&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>The way LR works, is after the user has successfully booked his transaction, LR redirects back to my webpage but my authentication fails because the session variables are all gone.</p>
  
  <p>I believe it has something to do with the CSRF-TOKEN that the rails application requires but LR obviously is not providing.</p>
  
  <p>Can I deactivate the CSRF feture for one specific page/action or is there any other workaround?</p>