210 lines
6.9 KiB
PHP
210 lines
6.9 KiB
PHP
<?php
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/**
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* HTTP proxy stream wrapper.
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*
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* This file is part of MadelineProto.
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* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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* MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2020 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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*
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\Stream\Proxy;
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use Amp\Promise;
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use Amp\Socket\ClientTlsContext;
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use Amp\Socket\EncryptableSocket;
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use danog\MadelineProto\Stream\Async\RawStream;
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use danog\MadelineProto\Stream\BufferedProxyStreamInterface;
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use danog\MadelineProto\Stream\ConnectionContext;
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use danog\MadelineProto\Stream\RawProxyStreamInterface;
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use danog\MadelineProto\Stream\RawStreamInterface;
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/**
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* HTTP proxy stream wrapper.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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*/
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class HttpProxy implements RawProxyStreamInterface, BufferedProxyStreamInterface
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{
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use RawStream;
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private $extra;
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/**
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* Connect to stream.
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*
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* @param ConnectionContext $ctx The connection context
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*
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* @return \Generator
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*/
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public function connect(ConnectionContext $ctx, string $header = ''): \Generator
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{
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$ctx = $ctx->getCtx();
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$uri = $ctx->getUri();
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$secure = $ctx->isSecure();
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if ($secure) {
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$ctx->setSocketContext($ctx->getSocketContext()->withTlsContext(new ClientTlsContext($uri->getHost())));
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}
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$ctx->setUri('tcp://'.$this->extra['address'].':'.$this->extra['port'])->secure(false);
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$this->stream = (yield from $ctx->getStream());
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$address = $uri->getHost();
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$port = $uri->getPort();
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try {
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if (\strlen(\inet_pton($address) === 16)) {
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$address = '['.$address.']';
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}
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} catch (\danog\MadelineProto\Exception $e) {
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}
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yield $this->stream->write("CONNECT {$address}:{$port} HTTP/1.1\r\nHost: {$address}:{$port}\r\nAccept: */*\r\n".$this->getProxyAuthHeader()."Connection: keep-Alive\r\n\r\n");
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$buffer = yield $this->stream->getReadBuffer($l);
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$headers = '';
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$was_crlf = false;
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while (true) {
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$piece = yield $buffer->bufferRead(2);
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$headers .= $piece;
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if ($piece === "\n\r") {
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// Assume end of headers with \r\n\r\n
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$headers .= yield $buffer->bufferRead(1);
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break;
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}
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if ($was_crlf && $piece === "\r\n") {
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break;
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}
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$was_crlf = $piece === "\r\n";
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}
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$headers = \explode("\r\n", $headers);
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list($protocol, $code, $description) = \explode(' ', $headers[0], 3);
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list($protocol, $protocol_version) = \explode('/', $protocol);
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if ($protocol !== 'HTTP') {
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throw new \danog\MadelineProto\Exception('Wrong protocol');
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}
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$code = (int) $code;
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unset($headers[0]);
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if (\array_pop($headers).\array_pop($headers) !== '') {
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throw new \danog\MadelineProto\Exception('Wrong last header');
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}
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foreach ($headers as $key => $current_header) {
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unset($headers[$key]);
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$current_header = \explode(':', $current_header, 2);
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$headers[\strtolower($current_header[0])] = \trim($current_header[1]);
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}
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$close = $protocol === 'HTTP/1.0';
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if (isset($headers['connection'])) {
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$close = \strtolower($headers['connection']) === 'close';
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}
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if ($code !== 200) {
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$read = '';
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if (isset($headers['content-length'])) {
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$read = yield $buffer->bufferRead((int) $headers['content-length']);
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}
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if ($close) {
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$this->disconnect();
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yield $this->connect($ctx);
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}
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\danog\MadelineProto\Logger::log(\trim($read));
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throw new \danog\MadelineProto\Exception($description, $code);
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}
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if ($close) {
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yield $this->stream->disconnect();
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yield $this->stream->connect($ctx);
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}
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if (isset($headers['content-length'])) {
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$length = (int) $headers['content-length'];
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$read = yield $buffer->bufferRead($length);
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}
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if ($secure) {
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yield $this->getSocket()->setupTls();
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}
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\danog\MadelineProto\Logger::log('Connected to '.$address.':'.$port.' via http');
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if (\strlen($header)) {
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yield (yield $this->stream->getWriteBuffer(\strlen($header)))->bufferWrite($header);
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}
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}
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/**
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* Async close.
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*
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* @return Promise
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*/
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public function disconnect()
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{
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return $this->stream->disconnect();
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}
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/**
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* Get write buffer asynchronously.
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*
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* @param int $length Length of data that is going to be written to the write buffer
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*
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* @return \Generator
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*/
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public function getWriteBuffer(int $length, string $append = ''): Promise
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{
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return $this->stream->getWriteBuffer($length, $append);
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}
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/**
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* Get read buffer asynchronously.
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*
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* @param int $length Length of payload, as detected by this layer
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*
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* @return \Generator
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*/
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public function getReadBuffer(&$length): Promise
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{
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return $this->stream->getReadBuffer($length);
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}
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public function read(): Promise
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{
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return $this->stream->read();
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}
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public function write(string $data): Promise
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{
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return $this->stream->write($data);
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}
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private function getProxyAuthHeader()
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{
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if (!isset($this->extra['username']) || !isset($this->extra['password'])) {
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return '';
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}
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return 'Proxy-Authorization: Basic '.\base64_encode($this->extra['username'].':'.$this->extra['password'])."\r\n";
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}
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/**
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* Sets proxy data.
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*
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* @param array $extra Proxy data
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*
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* @return void
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*/
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public function setExtra($extra)
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{
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$this->extra = $extra;
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}
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/**
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* {@inheritdoc}
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*
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* @return EncryptableSocket
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*/
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public function getSocket(): EncryptableSocket
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{
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return $this->stream->getSocket();
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}
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/**
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* {@inheritDoc}
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*
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* @return RawStreamInterface
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*/
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public function getStream(): RawStreamInterface
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{
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return $this->stream;
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}
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public static function getName(): string
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{
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return __CLASS__;
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}
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}
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