/**
* Assert that the given response indicates a succeeded WebSocket handshake.
*/
protected function assertHandshakeSucceeded(HttpResponse $response, string $nonce, array $protocols)
{
if ($response->getStatusCode() !== Http::SWITCHING_PROTOCOLS) {
throw new \RuntimeException(\sprintf('Unexpected HTTP response code: %s', $response->getStatusCode()));
}
if (!\in_array('upgrade', $response->getHeaderTokenValues('Connection'), true)) {
throw new \RuntimeException(\sprintf('HTTP connection header did not contain upgrade: "%s"', $response->getHeaderLine('Connection')));
}
if ('websocket' !== \strtolower($response->getHeaderLine('Upgrade'))) {
throw new \RuntimeException(\sprintf('HTTP upgrade header did not specify websocket: "%s"', $response->getHeaderLine('Upgrade')));
}
if (\base64_encode(\sha1($nonce . self::GUID, true)) !== $response->getHeaderLine('Sec-WebSocket-Accept')) {
throw new \RuntimeException('Failed to verify Sec-WebSocket-Accept HTTP header');
}
if ($response->hasHeader('Sec-WebSocket-Protocol')) {
if (!\in_array($response->getHeaderLine('Sec-WebSocket-Protocol'), $protocols, true)) {
throw new \OutOfRangeException(\sprintf('Unsupported protocol: "%s"', $response->getHeaderLine('Sec-WebSocket-Protocol')));
}
}
}
/**
* {@inheritdoc}
*/
public function upgradeConnection(SocketStream $socket, HttpRequest $request, HttpResponse $response) : \Generator
{
$endpoint = $response->getAttribute(Endpoint::class);
if (!$endpoint instanceof Endpoint) {
throw new \InvalidArgumentException('No endpoint object passed to WebSocket handler');
}
if ($this->logger) {
$this->logger->debug('HTTP/{protocol} connection from {peer} upgraded to WebSocket', ['protocol' => $request->getProtocolVersion(), 'peer' => $socket->getRemoteAddress()]);
}
$conn = new Connection($socket, false, $response->getHeaderLine('Sec-WebSocket-Protocol'));
if ($this->logger) {
$conn->setLogger($this->logger);
}
if ($deflate = $response->getAttribute(PerMessageDeflate::class)) {
$conn->enablePerMessageDeflate($deflate);
}
yield from $this->delegateToEndpoint($conn, $endpoint);
}
protected function shouldConnectionBeClosed(HttpResponse $response) : bool
{
if (!$this->keepAlive) {
return true;
}
if ($response->getProtocolVersion() === '1.0' && !\in_array('keep-alive', $response->getHeaderTokenValues('Connection'), true)) {
return true;
}
if (!$response->hasHeader('Content-Length') && 'chunked' !== \strtolower($response->getHeaderLine('Transfer-Encoding'))) {
return true;
}
return false;
}