/**
* Preform the handshake protocol between the server and the client, after this the client is free to communicate with the server
* @param $resSocket
* @param $strBuffer
* @return bool
*/
protected function handshake($resSocket, $strBuffer)
{
System::debug("\nRequesting handshake...");
System::debug($strBuffer);
list($strRequestURI, $strHost, $strOriginAddress, $intKey1, $intKey2, $strLast8Bytes, $strAcceptKey, $intProtocolVersion, $strProtocol) = $this->getHeaders($strBuffer);
System::debug("Handshaking...");
Sockets::setTemporaryVersion($resSocket, $intProtocolVersion);
//echo "\n\n".$intProtocolVersion."\n\n";
if ($intProtocolVersion == '13' || $intProtocolVersion == '8') {
// Generate our Socket-Accept key based on the IETF specifications
//$strReturnAcceptKey = $strAcceptKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11';
//$strReturnAcceptKey = sha1($strReturnAcceptKey, true);
//$strReturnAcceptKey = base64_encode($strReturnAcceptKey);
$strReturnAcceptKey = base64_encode(pack('H*', sha1($strAcceptKey . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11')));
$arrUpgradeHeaders = array('HTTP/1.1 101 Switching Protocols', 'Upgrade: websocket', 'Connection: Upgrade', sprintf('Sec-WebSocket-Accept: %s', $strReturnAcceptKey));
//Only return the protocol header if originally sent it.
if (!is_null($strProtocol)) {
$arrUpgradeHeaders[] = sprintf('Sec-WebSocket-Protocol: %s', $strProtocol);
}
//Set the end bit
$arrUpgradeHeaders[] = '';
} else {
$arrUpgradeHeaders = array('HTTP/1.1 101 WebSocket Protocol Handshake', 'Upgrade: WebSocket', 'Connection: Upgrade', sprintf('Sec-WebSocket-Origin: %s', $strOriginAddress), sprintf('Sec-WebSocket-Location: ws://%s%s', $strHost, $strRequestURI), '', $this->calculateKey($intKey1, $intKey2, $strLast8Bytes));
}
$strUpgradeHeader = '';
foreach ($arrUpgradeHeaders as $strEachHeader) {
$strUpgradeHeader .= sprintf("%s\r\n", $strEachHeader);
}
//$strUpgradeHeader .= chr(0);
Sockets::writeRawBuffer($resSocket, $strUpgradeHeader);
Sockets::setTemporaryHandshake($resSocket, true);
//Send the safari fix so that safari wont error upon connection
$arrSafariFix = array('instance' => null, 'system' => 'twist-safari-fix', 'action' => '', 'message' => 'Safari Fix', 'data' => array());
Sockets::writeJSON($resSocket, $arrSafariFix);
return true;
}
/**
* Send out a list of all active users on the server to the requesting socket
* @param $resUserSocket
* @param $arrData
* @return array
*/
public static function sendUserList($resUserSocket, $arrData)
{
$arrUsers = $arrOut = array();
foreach (self::getAll() as $arrEachUser) {
$arrUsers[$arrEachUser['name']] = array('user_id' => $arrEachUser['id'], 'user_name' => $arrEachUser['name']);
}
//Sort the list and then rebuild with numerical keys
ksort($arrUsers);
foreach ($arrUsers as $arrEachUser) {
$arrOut[] = $arrEachUser;
}
$arrResponse = array('instance' => array_key_exists('instance', $arrData) ? $arrData['instance'] : null, 'system' => 'twist', 'action' => $arrData['action'], 'message' => 'All active users', 'data' => array('users' => $arrOut));
Sockets::writeJSON($arrResponse, $resUserSocket);
}
