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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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/** |
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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 string |
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*/ |
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private $buffer; |
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/** |
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* @var int |
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*/ |
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private $readAheadSize; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function open($protocol, $host, $port, array $parameters = []) |
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{ |
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if ($this->isOpen()) { |
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return $this; |
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} |
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$parameters = array_merge(['connection_timeout' => 30, 'read_ahead' => 13000, 'timeout' => 1], $parameters); |
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$this->stream = @stream_socket_client( |
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sprintf('%s://%s:%d', $protocol, $host, $port), |
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$errno, |
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$errstr, |
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$parameters['connection_timeout'], |
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STREAM_CLIENT_CONNECT, |
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$this->createStreamContext($parameters) |
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); |
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if (!$this->stream) { |
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throw new IOException(sprintf('An error occur while connecting to "%s:%d": %s', $host, $port, $errstr)); |
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} |
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$this->buffer = ''; |
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$this->setReadingTimeout($parameters['timeout']); |
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$this->setReadAheadSize($parameters['read_ahead']); |
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return $this; |
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} |
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/** |
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* @param float $timeout |
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*/ |
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private function setReadingTimeout($timeout) |
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{ |
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list($sec, $usec) = explode('|', number_format($timeout, 6, '|', '')); |
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stream_set_timeout($this->stream, $sec, $usec); |
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} |
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/** |
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* @param int $size |
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*/ |
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private function setReadAheadSize($size) |
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{ |
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$this->readAheadSize = $size; |
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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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* @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 $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function peek($length, $blocking = true) |
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{ |
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$received = strlen($this->buffer); |
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if ($received >= $length) { |
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return $this->buffer; |
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} |
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$this->buffer .= $this->recv($length - $received, $blocking); |
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if (strlen($this->buffer) >= $length) { |
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return $this->buffer; |
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} |
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return null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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View Code Duplication |
public function read($length, $blocking = true) |
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{ |
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if ($this->peek($length, $blocking) === null) { |
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return null; |
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} |
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$data = substr($this->buffer, 0, $length); |
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$this->buffer = substr($this->buffer, $length, strlen($this->buffer) - $length); |
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return $data; |
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} |
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/** |
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* @param int $length |
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* @param bool $blocking |
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* |
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* @return string |
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* |
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* @throws IOException |
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*/ |
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private function recv($length, $blocking) |
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{ |
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if (!$this->isOpen()) { |
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throw new IOClosedException('Connection is closed'); |
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} |
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if ($this->readAheadSize) { |
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$meta = stream_get_meta_data($this->stream); |
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if ($length < $meta['unread_bytes']) { |
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$length = min($this->readAheadSize, $meta['unread_bytes']); |
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} |
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} |
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stream_set_blocking($this->stream, $blocking); |
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if (($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
