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POFacebook Chat API: Authentication
 

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  1. POFacebook Chat API: Authentication
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    <p>just trying to get started on a little project of mine with the Facebook Chat API, but I'm already failing. This is mostly sample code from the Facebook dev site. </p> <p>Why is this not connecting? All I get is "An error occurred".</p> <pre><code>&lt;?php // Copyright 2004-present Facebook. All Rights Reserved. $STREAM_XML = '&lt;stream:stream '. 'xmlns:stream="http://etherx.jabber.org/streams" '. 'version="1.0" xmlns="jabber:client" to="chat.facebook.com" '. 'xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace"&gt;'; $AUTH_XML = '&lt;auth xmlns="urn:ietf:params:xml:ns:xmpp-sasl" '. 'mechanism="X-FACEBOOK-PLATFORM"&gt;&lt;/auth&gt;'; $CLOSE_XML = '&lt;/stream:stream&gt;'; $RESOURCE_XML = '&lt;iq type="set" id="3"&gt;'. '&lt;bind xmlns="urn:ietf:params:xml:ns:xmpp-bind"&gt;'. '&lt;resource&gt;fb_xmpp_script&lt;/resource&gt;&lt;/bind&gt;&lt;/iq&gt;'; $SESSION_XML = '&lt;iq type="set" id="4" to="chat.facebook.com"&gt;'. '&lt;session xmlns="urn:ietf:params:xml:ns:xmpp-session"/&gt;&lt;/iq&gt;'; $START_TLS = '&lt;starttls xmlns="urn:ietf:params:xml:ns:xmpp-tls"/&gt;'; function open_connection($server) { print "[INFO] Opening connection... "; $fp = fsockopen($server, 5222, $errno, $errstr); if (!$fp) { print "$errstr ($errno)&lt;br&gt;"; } else { print "connnection open&lt;br&gt;"; } 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, $value=null, &amp;$ret=null) { static $val = null, $index = null; do { if ($val === null &amp;&amp; $index === null) { list($val, $index) = recv_xml($fp); if ($val === null || $index === null) { return false; } } foreach ($index as $tag_key =&gt; $tag_array) { if ($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 =&gt; $pos) { if ($val[$pos]['tag'] === $tag &amp;&amp; isset($val[$pos]['value']) &amp;&amp; $val[$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' =&gt; $challenge_array['method'], 'nonce' =&gt; $challenge_array['nonce'], 'access_token' =&gt; $access_token, 'api_key' =&gt; $options['app_id'], 'call_id' =&gt; 0, 'v' =&gt; '1.0', ); // creates signature $response = http_build_query($resp_array); // sends the response and waits for success $xml = '&lt;response xmlns="urn:ietf:params:xml:ns:xmpp-sasl"&gt;'. base64_encode($response).'&lt;/response&gt;'; 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, $CLOSE_XML); print ("Authentication complete&lt;br&gt;"); fclose($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". "&amp;client_id=" . $app_id . "&amp;redirect_uri=" . urlencode($my_url) ; echo("&lt;script&gt;top.location.href='" . $dialog_url . "'&lt;/script&gt;"); } $token_url = "https://graph.facebook.com/oauth/access_token?client_id=" . $app_id . "&amp;redirect_uri=" . urlencode($my_url) . "&amp;client_secret=" . $app_secret . "&amp;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&lt;br&gt;"; $app_id='APP ID'; $app_secret='APP SECRET'; $my_url = "URL OF THIS PHP FILE"; $uid = '1496822489'; $access_token = get_access_token($app_id,$app_secret,$my_url); print "access_token: ".$access_token."&lt;br&gt;"; $options = array( 'uid' =&gt; $uid, 'app_id' =&gt; $app_id, 'server' =&gt; 'chat.facebook.com', ); // prints options used print "server: ".$options['server']."&lt;br&gt;"; print "uid: ".$options['uid']."&lt;br&gt;"; print "app id: ".$options['app_id']."&lt;br&gt;"; if (xmpp_connect($options, $access_token)) { print "Done&lt;br&gt;"; } else { print "An error ocurred&lt;br&gt;"; } } // first test function goOnline() { $message = '&lt;presence /&gt;'; send_xml($fp, $message); } ?&gt; &lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;test fb api&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;?php _main(); ?&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. PTQuestion
    1. USTobias Timpe
    1. USTobias Timpe
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    1. PO
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    1. COI hope you are placing correct details in place of `$app_id='APP ID';` and `$app_secret='APP SECRET';`...
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      1. POFacebook Chat API: Authentication
      1. USHiren Pandya
    2. COYeah, I'm not that stupid. It redirects back to the the php file, but all I get back is a "An error occurred".
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      1. POFacebook Chat API: Authentication
      1. USTobias Timpe
 

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