title: Graph API Access without HTTPS
body: <p>We have a Facebook app running on our production having HTTPS and it works fine.
  For same app we have a development/stage setup but don’t have HTTPS.
  Till 2012-02-23, both the server works fine. 
  Now our app on development/stage server throws below error:</p>
  
  <ol>
  <li><p>CurlException: 28: connect() timed out!</p></li>
  <li><p>Warning: file_get_contents(https://graph.facebook.com/me?access_token=...): failed to open stream: Connection timed out</p></li>
  </ol>
  
  <p>I have question:</p>
  
  <ol>
  <li><p>Is it mandatory to have a HTTPS to communicate with Graph API?</p></li>
  <li><p>Or, Facebook does blacklisting of IP – if so how to make IP white list?</p></li>
  </ol>
  
  <p>Thanks in advance...</p>