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liveuser |
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<?php
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namespace Ratchet\RFC6455\Handshake;
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use Psr\Http\Message\RequestInterface;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Http\Message\UriInterface;
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use GuzzleHttp\Psr7\Request;
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class ClientNegotiator {
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/**
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* @var ResponseVerifier
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*/
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private $verifier;
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/**
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* @var \Psr\Http\Message\RequestInterface
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*/
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private $defaultHeader;
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function __construct(PermessageDeflateOptions $perMessageDeflateOptions = null) {
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$this->verifier = new ResponseVerifier;
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$this->defaultHeader = new Request('GET', '', [
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'Connection' => 'Upgrade'
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, 'Upgrade' => 'websocket'
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, 'Sec-WebSocket-Version' => $this->getVersion()
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, 'User-Agent' => "Ratchet"
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]);
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if ($perMessageDeflateOptions === null) {
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$perMessageDeflateOptions = PermessageDeflateOptions::createDisabled();
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}
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// https://bugs.php.net/bug.php?id=73373
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// https://bugs.php.net/bug.php?id=74240 - need >=7.1.4 or >=7.0.18
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if ($perMessageDeflateOptions->isEnabled() &&
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!PermessageDeflateOptions::permessageDeflateSupported()) {
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trigger_error('permessage-deflate is being disabled because it is not support by your PHP version.', E_USER_NOTICE);
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$perMessageDeflateOptions = PermessageDeflateOptions::createDisabled();
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}
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if ($perMessageDeflateOptions->isEnabled() && !function_exists('deflate_add')) {
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trigger_error('permessage-deflate is being disabled because you do not have the zlib extension.', E_USER_NOTICE);
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$perMessageDeflateOptions = PermessageDeflateOptions::createDisabled();
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}
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$this->defaultHeader = $perMessageDeflateOptions->addHeaderToRequest($this->defaultHeader);
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}
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public function generateRequest(UriInterface $uri) {
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return $this->defaultHeader->withUri($uri)
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->withHeader("Sec-WebSocket-Key", $this->generateKey());
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}
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public function validateResponse(RequestInterface $request, ResponseInterface $response) {
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return $this->verifier->verifyAll($request, $response);
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}
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public function generateKey() {
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$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwzyz1234567890+/=';
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$charRange = strlen($chars) - 1;
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$key = '';
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for ($i = 0; $i < 16; $i++) {
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$key .= $chars[mt_rand(0, $charRange)];
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}
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return base64_encode($key);
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}
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public function getVersion() {
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return 13;
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}
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}
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