Facebook的聊天API，xmpp_connect返回false

Question

的Facebook聊天API， 功能xmpp_connect上塊返回false

 

    // gets challenge from server and decode it 
    send_xml($fp, $AUTH_XML); 
    if (!find_xmpp($fp, 'CHALLENGE', null, $challenge)) { 
     return false; 
    } 

I can't understand what is the problem. Please help. 

 

    // Copyright 2004-present Facebook. All Rights Reserved. 

    $STREAM_XML = ''; 

    $AUTH_XML = ''; 

    $CLOSE_XML = ''; 

    $RESOURCE_XML = ''. 
     ''. 
     'fb_xmpp_script'; 

    $SESSION_XML = ''. 
     ''; 

    $START_TLS = ''; 


    function open_connection($server) { 
     print "[INFO] Opening connection... "; 

     $fp = fsockopen($server, 5222, $errno, $errstr); 
     if (!$fp) { 
     print "$errstr ($errno)
"; 
     } else { 
     print "connnection open
"; 
     } 

     return $fp; 
    } 

    function send_xml($fp, $xml) { 
     fwrite($fp, $xml); 
    } 

    function recv_xml($fp, $size=4096) { 
     $xml = fread($fp, $size); 
     if ($xml === "") { 
     return null; 
     } 

     // parses xml 
     $xml_parser = xml_parser_create(); 
     xml_parse_into_struct($xml_parser, $xml, $val, $index); 
     xml_parser_free($xml_parser); 

     return array($val, $index); 
    } 

    function find_xmpp($fp, $tag, $value=null, &$ret=null) { 
     static $val = null, $index = null; 

     do { 
     if ($val === null && $index === null) { 
      list($val, $index) = recv_xml($fp); 
      if ($val === null || $index === null) { 
      return false; 
      } 
     } 

     foreach ($index as $tag_key => $tag_array) { 
      if ($tag_key === $tag) { 
      if ($value === null) { 
       if (isset($val[$tag_array[0]]['value'])) { 
       $ret = $val[$tag_array[0]]['value']; 
       } 
       return true; 
      } 
      foreach ($tag_array as $i => $pos) { 
       if ($val[$pos]['tag'] === $tag && isset($val[$pos]['value']) && 
       $val[$pos]['value'] === $value) { 
        $ret = $val[$pos]['value']; 
        return true; 
       } 
      } 
      } 
     } 
     $val = $index = null; 
     } while (!feof($fp)); 

     return false; 
    } 


    function xmpp_connect($options, $access_token) { 
     global $STREAM_XML, $AUTH_XML, $RESOURCE_XML, $SESSION_XML, $CLOSE_XML, $START_TLS; 

     $fp = open_connection($options['server']); 
     if (!$fp) { 
     return false; 
     } 

     // initiates auth process (using X-FACEBOOK_PLATFORM) 
     send_xml($fp, $STREAM_XML); 
     if (!find_xmpp($fp, 'STREAM:STREAM')) { 
     return false; 
     } 
     if (!find_xmpp($fp, 'MECHANISM', 'X-FACEBOOK-PLATFORM')) { 
     return false; 
     } 

     // starting tls - MANDATORY TO USE OAUTH TOKEN!!!! 
     send_xml($fp, $START_TLS); 
     if (!find_xmpp($fp, 'PROCEED', null, $proceed)) { 
     return false; 
     } 
     stream_socket_enable_crypto($fp, true, STREAM_CRYPTO_METHOD_TLS_CLIENT); 

     send_xml($fp, $STREAM_XML); 
     if (!find_xmpp($fp, 'STREAM:STREAM')) { 
     return false; 
     } 
     if (!find_xmpp($fp, 'MECHANISM', 'X-FACEBOOK-PLATFORM')) { 
     return false; 
     } 

     // gets challenge from server and decode it 
     send_xml($fp, $AUTH_XML); 
     if (!find_xmpp($fp, 'CHALLENGE', null, $challenge)) { 
     return false; 
     } 
     $challenge = base64_decode($challenge); 
     $challenge = urldecode($challenge); 
     parse_str($challenge, $challenge_array); 

     // creates the response array 
     $resp_array = array(
     'method' => $challenge_array['method'], 
     'nonce' => $challenge_array['nonce'], 
     'access_token' => $access_token, 
     'api_key' => $options['app_id'], 
     'call_id' => 0, 
     'v' => '1.0', 
    ); 
     // creates signature 
     $response = http_build_query($resp_array); 

     // sends the response and waits for success 
     $xml = ''. 
     base64_encode($response).''; 
     send_xml($fp, $xml); 
     if (!find_xmpp($fp, 'SUCCESS')) { 
     return false; 
     } 

     // finishes auth process 
     send_xml($fp, $STREAM_XML); 
     if (!find_xmpp($fp,'STREAM:STREAM')) { 
     return false; 
     } 
     if (!find_xmpp($fp, 'STREAM:FEATURES')) { 
     return false; 
     } 
    send_xml($fp, $RESOURCE_XML); 
     if (!find_xmpp($fp, 'JID')) { 
     return false; 
     } 
     send_xml($fp, $SESSION_XML); 
     if (!find_xmpp($fp, 'SESSION')) { 
     return false; 
     } 

     // we made it! 
     send_xml($fp, $CLOSE_XML); 
     print ("Authentication complete
"); 
     fclose($fp); 

     return true; 
    } 



    //Gets access_token with xmpp_login permission 
    function get_access_token($app_id, $app_secret, $my_url){ 

     $code = $_REQUEST["code"]; 

     if(empty($code)) { 
     $dialog_url = "https://www.facebook.com/dialog/oauth?scope=xmpp_login". 
     "&client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url) ; 
     echo("top.location.href='" . $dialog_url . "'"); 
     } 
     $token_url = "https://graph.facebook.com/oauth/access_token?client_id=" 
     . $app_id . "&redirect_uri=" . urlencode($my_url) 
     . "&client_secret=" . $app_secret 
     . "&code=" . $code; 
     $access_token = file_get_contents($token_url); 
     parse_str($access_token, $output); 

     return($output['access_token']); 
    } 

    function _main() { 
     print "Test platform connect for XMPP
"; 
    $app_id=''; 
     $app_secret=''; 
     $my_url = ""; 
     $uid = ''; 
     $access_token = get_access_token($app_id,$app_secret,$my_url); 
     print "access_token: ".$access_token."
"; 

     $options = array(
     'uid' => $uid, 
     'app_id' => $app_id, 
     'server' => 'chat.facebook.com', 
     ); 

     // prints options used 
     print "server: ".$options['server']."
"; 
     print "uid: ".$options['uid']."
"; 
     print "app id: ".$options['app_id']."
"; 

     if (xmpp_connect($options, $access_token)) { 
     print "Done
"; 
     } else { 
     print "An error ocurred
"; 
     } 

    } 

    _main(); 

文檔：https://developers.facebook.com/docs/chat/

Answer 1

在功能recv_xml取代

$xml = fread($fp, $size); 

至

$xml = fread($fp, $size); 

if (!preg_match('/^</', $xml)) { 
    $xml = '<' . $xml; 
}