/**
* Send websocket handshake.
*
* @param \Workerman\Connection\TcpConnection $connection
* @return void
*/
public static function sendHandshake($connection)
{
if (!empty($connection->handshakeStep)) {
return;
}
// Get Host.
$port = $connection->getRemotePort();
$host = $port === 80 ? $connection->getRemoteHost() : $connection->getRemoteHost() . ':' . $port;
// Handshake header.
$header = 'GET ' . $connection->getRemoteURI() . " HTTP/1.1\r\n" . "Host: {$host}\r\n" . "Connection: Upgrade\r\n" . "Upgrade: websocket\r\n" . "Origin: " . (isset($connection->websocketOrigin) ? $connection->websocketOrigin : '*') . "\r\n" . "Sec-WebSocket-Version: 13\r\n" . "Sec-WebSocket-Key: " . base64_encode(sha1(uniqid(mt_rand(), true), true)) . "\r\n\r\n";
$connection->send($header, true);
$connection->handshakeStep = 1;
$connection->websocketCurrentFrameLength = 0;
$connection->websocketDataBuffer = '';
$connection->tmpWebsocketData = '';
}
