title: CAS logout and intercept POST request
body: <p>I'm developping a webapp linked to a CAS server with phpCAS. Up to now everything was going well, I was able to access my app after the CAS authentication. I'm now supposed to implement a logout feature : when someone logs out of the CAS server, it sends logout request to all apps opened for that session.</p>
  <p>The problem is my app doesn't seem to receive that request. I contacted the adminstrator who told me that he can see the request leaving the server. He then asked me to confirm him that my server received that request.</p>
  <p>And here is the problem : I have no idea how to see if the server received the logout request (a json file...apparently a POST Method is used to send the data to the address of my app...as you see, I have no idea what I'm talking about.). I've been searching for days now and I'm totally in the dark. I tried to use tcpdump. I see a TCP F Flag when I logout of the CAS server so it seemed first like a good thing. But I have no idea how to see if my server has received a logout request.</p>
  <p>Hoping that someone can help me...</p>
  <p>Thanking you in advance.</p>