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<?php |
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namespace ButterAMQP\IO; |
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use ButterAMQP\Exception\IOClosedException; |
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use ButterAMQP\Exception\IOException; |
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use ButterAMQP\IOInterface; |
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class StreamIO implements IOInterface |
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{ |
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const DEFAULT_CONNECTION_TIMEOUT = 30; |
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const DEFAULT_READING_TIMEOUT = 1; |
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/** |
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* @var resource|null |
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*/ |
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private $stream; |
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/** |
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* @var int |
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*/ |
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private $timeoutSec; |
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/** |
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* @var int |
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*/ |
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private $timeoutUsec; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function open($protocol, $host, $port, array $parameters = []) |
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{ |
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if ($this->isOpen()) { |
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return $this; |
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} |
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$this->stream = $this->openConnection( |
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$protocol, |
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$host, |
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$port, |
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$parameters |
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); |
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$this->tuneConnection($parameters); |
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return $this; |
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} |
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/** |
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* @param string $protocol |
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* @param string $host |
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* @param int $port |
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* @param array $parameters |
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* |
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* @return resource |
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* |
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* @throws IOException |
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*/ |
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private function openConnection($protocol, $host, $port, array $parameters = []) |
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{ |
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$timeout = isset($parameters['connection_timeout']) ? |
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$parameters['connection_timeout'] : self::DEFAULT_CONNECTION_TIMEOUT; |
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$stream = @stream_socket_client( |
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sprintf('%s://%s:%d', $protocol, $host, $port), |
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$errno, |
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$errstr, |
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$timeout, |
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STREAM_CLIENT_CONNECT, |
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$this->createStreamContext($parameters) |
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); |
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if (!$stream) { |
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throw new IOException(sprintf('An error occur while connecting to "%s:%d": %s', $host, $port, $errstr)); |
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} |
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return $stream; |
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} |
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/** |
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* @param array $parameters |
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* |
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* @return resource |
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*/ |
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private function createStreamContext(array $parameters) |
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{ |
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static $options = [ |
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'certfile' => 'local_cert', |
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'keyfile' => 'local_pk', |
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'cacertfile' => 'cafile', |
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'passphrase' => 'passphrase', |
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'verify' => 'verify_peer', |
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'allow_self_signed' => 'allow_self_signed', |
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]; |
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$context = stream_context_create(); |
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foreach ($parameters as $name => $value) { |
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if (!isset($options[$name])) { |
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continue; |
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} |
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stream_context_set_option($context, 'ssl', $options[$name], $value); |
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} |
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return $context; |
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} |
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/** |
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* @param array $parameters |
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*/ |
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private function tuneConnection(array $parameters) |
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{ |
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$timeout = isset($parameters['timeout']) ? $parameters['timeout'] : self::DEFAULT_READING_TIMEOUT; |
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list($sec, $usec) = explode('|', number_format($timeout, 6, '|', '')); |
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$this->timeoutSec = $sec; |
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$this->timeoutUsec = $usec; |
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stream_set_timeout($this->stream, $this->timeoutSec, $this->timeoutUsec); |
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stream_set_read_buffer($this->stream, 0); |
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stream_set_write_buffer($this->stream, 0); |
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} |
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/** |
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* @return $this |
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*/ |
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public function close() |
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{ |
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if (!$this->stream) { |
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return $this; |
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} |
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fclose($this->stream); |
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$this->stream = null; |
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return $this; |
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} |
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/** |
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* @param string $data |
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* @param int|null $length |
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* |
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* @return $this |
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* |
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* @throws IOException |
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*/ |
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public function write($data, $length = null) |
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{ |
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if ($length === null) { |
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$length = strlen($data); |
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} |
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while ($length > 0) { |
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if (!$this->isOpen()) { |
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throw new IOClosedException('Connection is closed'); |
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} |
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$written = @fwrite($this->stream, $data, $length); |
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if ($written === false) { |
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throw new IOException('An error occur while writing to socket'); |
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} |
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$length -= $written; |
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$data = $length ? substr($data, $written, $length) : ''; |
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} |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function read($length, $blocking = true) |
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{ |
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stream_set_blocking($this->stream, $blocking); |
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if (!$this->isOpen()) { |
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throw new IOClosedException('Socket is closed or was not open'); |
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} |
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$r = [$this->stream]; |
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$w = null; |
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$e = null; |
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if ($blocking && @stream_select($r, $w, $e, $this->timeoutSec, $this->timeoutUsec) === false) { |
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throw new IOException('An error occur while selecting stream'); |
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} |
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if (($received = fread($this->stream, $length)) === false) { |
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throw new IOException('An error occur while reading from the socket'); |
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} |
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return $received; |
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} |
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/** |
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* @return bool |
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*/ |
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public function isOpen() |
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{ |
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return is_resource($this->stream) && !feof($this->stream); |
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} |
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} |
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skolodyazhnyy /
butter-amqplib
