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<?php |
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/* |
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* This file is part of JSON RPC Client. |
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* |
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* (c) Igor Lazarev <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Strider2038\JsonRpcClient\Transport; |
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use Strider2038\JsonRpcClient\Exception\ConnectionFailedException; |
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use Strider2038\JsonRpcClient\Exception\InvalidConfigException; |
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use Strider2038\JsonRpcClient\Exception\RemoteProcedureCallFailedException; |
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/** |
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* @author Igor Lazarev <[email protected]> |
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*/ |
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class TcpTransport implements TransportInterface |
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{ |
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/** @var string */ |
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private $url; |
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/** @var int */ |
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private $timeoutMs; |
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/** @var resource|null */ |
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private $client; |
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/** |
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* @param string $url |
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* @param int $timeoutMs |
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* |
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* @throws InvalidConfigException |
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*/ |
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public function __construct(string $url, int $timeoutMs = 1000) |
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{ |
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$this->validateUrl($url); |
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$this->url = $url; |
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$this->timeoutMs = $timeoutMs; |
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} |
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public function __destruct() |
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{ |
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if (is_resource($this->client)) { |
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fclose($this->client); |
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} |
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} |
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public function send(string $request): string |
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{ |
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$client = $this->getSocketClient(); |
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fwrite($client, $request); |
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fwrite($client, "\n"); |
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fflush($client); |
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$response = fgets($client); |
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$this->validateMetaData($client); |
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return $response; |
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} |
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/** |
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* @param string $url |
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* |
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* @throws InvalidConfigException |
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*/ |
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private function validateUrl(string $url): void |
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{ |
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if (false === filter_var($url, FILTER_VALIDATE_URL)) { |
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throw new InvalidConfigException( |
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sprintf('Valid URL is expected for TCP/IP transport. Given value is "%s".', $url) |
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); |
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} |
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if ('tcp' !== parse_url($url, PHP_URL_SCHEME)) { |
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throw new InvalidConfigException( |
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sprintf('URL for TCP/IP transport must start with "tcp://" scheme. Given value is "%s".', $url) |
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); |
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} |
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} |
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/** |
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* @return resource |
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* |
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* @throws ConnectionFailedException |
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*/ |
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private function getSocketClient() |
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{ |
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if (null === $this->client) { |
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$this->client = $this->createSocketClient(); |
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} |
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return $this->client; |
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} |
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/** |
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* @return resource |
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* |
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* @throws ConnectionFailedException |
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*/ |
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private function createSocketClient() |
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{ |
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$client = stream_socket_client($this->url, $errno, $errstr, ((float) $this->timeoutMs) / 1000); |
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if (!is_resource($client)) { |
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throw new ConnectionFailedException($this->url, sprintf('%d: %s', $errno, $errstr)); |
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} |
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if (false === stream_set_timeout($client, 0, $this->timeoutMs * 1000)) { |
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throw new ConnectionFailedException($this->url, 'cannot set timeout'); |
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} |
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return $client; |
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} |
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private function validateMetaData($client): void |
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{ |
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$info = stream_get_meta_data($client); |
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if ($info['timed_out']) { |
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$errorMessage = sprintf('JSON RPC request to %s failed by timeout %d ms.', $this->url, $this->timeoutMs); |
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throw new RemoteProcedureCallFailedException($errorMessage); |
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} |
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} |
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} |
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strider2038 /
json-rpc-client
