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<?php |
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/** |
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* This file is a part of Woketo package. |
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* |
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* (c) Nekland <[email protected]> |
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* |
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* For the full license, take a look to the LICENSE file |
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* on the root directory of this project |
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*/ |
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namespace Nekland\Woketo\Rfc6455; |
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use Nekland\Woketo\Exception\WebsocketException; |
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use Nekland\Woketo\Exception\WebsocketVersionException; |
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use Nekland\Woketo\Http\Request; |
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use Nekland\Woketo\Http\Response; |
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/** |
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* Class ServerHandshake |
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* |
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* This class is highly inspired by ratchetphp/RFC6455. |
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*/ |
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class ServerHandshake |
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{ |
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const GUID = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'; |
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const SUPPORTED_VERSIONS = [13]; |
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/** |
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* Used when doing the handshake to encode the key, verifying client/server are speaking the same language |
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* @param string $key |
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* @param Response $response |
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* @return string |
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*/ |
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public function sign($key, Response $response = null) |
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{ |
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if ($key instanceof Request) { |
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$key = $key->getHeader('Sec-WebSocket-Key'); |
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} |
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$sign = \base64_encode(\sha1($key . ServerHandshake::GUID, true)); |
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if (null !== $response) { |
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$response->addHeader('Sec-WebSocket-Accept', $sign); |
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} |
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return $sign; |
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} |
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/** |
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* @param Request $request |
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* @return bool |
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* @throws WebsocketException |
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*/ |
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public function verify(Request $request) |
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{ |
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if ($request->getHttpVersion() !== 'HTTP/1.1') { |
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throw new WebsocketException( |
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\sprintf('Wrong http version, HTTP/1.1 expected, "%s" received.', $request->getHttpVersion()) |
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); |
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} |
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if ($request->getMethod() !== 'GET') { |
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throw new WebsocketException( |
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\sprintf('Wrong http method, GET expected, "%" received.', $request->getMethod()) |
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); |
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} |
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$headers = $request->getHeaders(); |
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if (empty($headers['Sec-WebSocket-Key'])) { |
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throw new WebsocketException( |
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\sprintf('Missing websocket key header.') |
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); |
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} |
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if (empty($headers['Upgrade']) || 'websocket' !== \strtolower($headers['Upgrade'])) { |
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throw new WebsocketException( |
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\sprintf('Wrong or missing upgrade header.') |
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); |
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} |
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$version = $headers->get('Sec-WebSocket-Version'); |
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if (!\in_array($version, ServerHandshake::SUPPORTED_VERSIONS)) { |
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throw new WebsocketVersionException(sprintf('Version %s not supported by Woketo for now.', $version)); |
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} |
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return true; |
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} |
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} |
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Nekland /
Woketo
