/**
* Build a response header
*
* @param $buffer
* data to be used in response header
* @return
* response header
*/
static function getResponseHeaders($buffer = '', $uniqueOrigin = FALSE)
{
list($resource, $host, $origin, $strkey1, $strkey2, $data) = self::getRequestHeaders($buffer);
if (!self::validOrigin($origin, $uniqueOrigin)) {
self::console('Refusing connection from origin %s. Allowed origin(s): %s', array($origin, implode(', ', $uniqueOrigin)));
return FALSE;
}
// find numbers
$pattern = '/[^\\d]*/';
$replacement = '';
$numkey1 = preg_replace($pattern, $replacement, $strkey1);
$numkey2 = preg_replace($pattern, $replacement, $strkey2);
// find spaces
$pattern = '/[^ ]*/';
$replacement = '';
$spaces1 = strlen(preg_replace($pattern, $replacement, $strkey1));
$spaces2 = strlen(preg_replace($pattern, $replacement, $strkey2));
if ($spaces1 == 0 || $spaces2 == 0 || $numkey1 % $spaces1 != 0 || $numkey2 % $spaces2 != 0) {
WSHelpers::console('Handshake failed');
return FALSE;
}
$ctx = hash_init('md5');
hash_update($ctx, pack("N", $numkey1 / $spaces1));
hash_update($ctx, pack("N", $numkey2 / $spaces2));
hash_update($ctx, $data);
$hash_data = hash_final($ctx, TRUE);
return "HTTP/1.1 101 WebSocket Protocol Handshake\r\n" . "Upgrade: WebSocket\r\n" . "Connection: Upgrade\r\n" . "Sec-WebSocket-Origin: " . $origin . "\r\n" . "Sec-WebSocket-Location: ws://" . $host . $resource . "\r\n" . "\r\n" . $hash_data;
}
/**
* Shake hands with connecting user
*
* @param $user
* The user object of the new user
* @param $buffer
* The received headers
* @return
* TRUE if successfull handshake, FALSE if not
*/
private final function doHandshake($user, $buffer)
{
WSHelpers::console("\nRequesting handshake for user %s", $user->id);
if (!($upgrade = WSHelpers::getResponseHeaders($buffer, $this->config->uniqueOrigin))) {
return FALSE;
}
socket_write($user->socket, $upgrade . chr(0), strlen($upgrade . chr(0)));
$user->handshake = TRUE;
WSHelpers::console('Done handshaking for user %s', $user->id);
return TRUE;
}
