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<?php |
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namespace PhpAmqpLib\Channel; |
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use PhpAmqpLib\Connection\AbstractConnection; |
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use PhpAmqpLib\Exception\AMQPChannelClosedException; |
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use PhpAmqpLib\Exception\AMQPConnectionClosedException; |
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use PhpAmqpLib\Exception\AMQPInvalidFrameException; |
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use PhpAmqpLib\Exception\AMQPNoDataException; |
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use PhpAmqpLib\Exception\AMQPNotImplementedException; |
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use PhpAmqpLib\Exception\AMQPOutOfBoundsException; |
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use PhpAmqpLib\Exception\AMQPOutOfRangeException; |
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use PhpAmqpLib\Helper\DebugHelper; |
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use PhpAmqpLib\Helper\Protocol\MethodMap080; |
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use PhpAmqpLib\Helper\Protocol\MethodMap091; |
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use PhpAmqpLib\Helper\Protocol\Protocol080; |
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use PhpAmqpLib\Helper\Protocol\Protocol091; |
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use PhpAmqpLib\Helper\Protocol\Wait080; |
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use PhpAmqpLib\Helper\Protocol\Wait091; |
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use PhpAmqpLib\Message\AMQPMessage; |
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use PhpAmqpLib\Wire; |
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use PhpAmqpLib\Wire\AMQPReader; |
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abstract class AbstractChannel |
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{ |
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/** |
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* @deprecated |
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*/ |
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const PROTOCOL_080 = Wire\Constants080::VERSION; |
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/** |
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* @deprecated |
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*/ |
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const PROTOCOL_091 = Wire\Constants091::VERSION; |
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/** |
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* Lower level queue for frames |
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* @var \SplQueue|Frame[] |
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*/ |
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protected $frame_queue; |
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/** |
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* Higher level queue for methods |
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* @var array |
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*/ |
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protected $method_queue = array(); |
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/** @var bool */ |
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protected $auto_decode = false; |
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/** @var Wire\Constants */ |
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protected $constants; |
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/** @var \PhpAmqpLib\Helper\DebugHelper */ |
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protected $debug; |
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/** @var null|AbstractConnection */ |
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protected $connection; |
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/** @var string */ |
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protected $protocolVersion; |
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/** @var int */ |
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protected $maxBodySize; |
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/** @var Protocol080|Protocol091 */ |
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protected $protocolWriter; |
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/** @var Wait080|Wait091 */ |
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protected $waitHelper; |
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/** @var MethodMap080|MethodMap091 */ |
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protected $methodMap; |
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/** @var int|null */ |
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protected $channel_id; |
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/** @var Wire\AMQPBufferReader */ |
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protected $msg_property_reader; |
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/** @var Wire\AMQPBufferReader */ |
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protected $dispatch_reader; |
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/** |
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* @param AbstractConnection $connection |
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* @param int $channel_id |
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* @throws \PhpAmqpLib\Exception\AMQPRuntimeException |
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*/ |
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public function __construct(AbstractConnection $connection, $channel_id) |
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{ |
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$this->connection = $connection; |
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$this->channel_id = (int)$channel_id; |
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$connection->channels[$channel_id] = $this; |
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$this->msg_property_reader = new Wire\AMQPBufferReader(''); |
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$this->dispatch_reader = new Wire\AMQPBufferReader(''); |
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$this->protocolVersion = self::getProtocolVersion(); |
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switch ($this->protocolVersion) { |
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case Wire\Constants091::VERSION: |
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$constantClass = Wire\Constants091::class; |
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$this->protocolWriter = new Protocol091(); |
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$this->waitHelper = new Wait091(); |
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$this->methodMap = new MethodMap091(); |
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break; |
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case Wire\Constants080::VERSION: |
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$constantClass = Wire\Constants080::class; |
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$this->protocolWriter = new Protocol080(); |
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$this->waitHelper = new Wait080(); |
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$this->methodMap = new MethodMap080(); |
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break; |
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default: |
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throw new AMQPNotImplementedException(sprintf( |
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'Protocol: %s not implemented.', |
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$this->protocolVersion |
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)); |
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} |
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$this->constants = new $constantClass(); |
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$this->debug = new DebugHelper($this->constants); |
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$this->frame_queue = new \SplQueue(); |
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} |
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/** |
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* @return string |
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* @throws AMQPOutOfRangeException |
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*/ |
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public static function getProtocolVersion() |
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{ |
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$protocol = defined('AMQP_PROTOCOL') ? AMQP_PROTOCOL : Wire\Constants091::VERSION; |
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//adding check here to catch unknown protocol ASAP, as this method may be called from the outside |
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if (!in_array($protocol, array(Wire\Constants080::VERSION, Wire\Constants091::VERSION), true)) { |
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throw new AMQPOutOfRangeException(sprintf('Protocol version %s not implemented.', $protocol)); |
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} |
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return $protocol; |
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} |
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/** |
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* @return int|null |
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*/ |
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public function getChannelId() |
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{ |
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return $this->channel_id; |
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} |
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/** |
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* @param int $max_bytes Max message body size for this channel |
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* @return $this |
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*/ |
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public function setBodySizeLimit($max_bytes) |
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{ |
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$max_bytes = (int) $max_bytes; |
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if ($max_bytes > 0) { |
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$this->maxBodySize = $max_bytes; |
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} |
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return $this; |
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} |
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/** |
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* @return AbstractConnection|null |
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*/ |
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public function getConnection() |
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{ |
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return $this->connection; |
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} |
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/** |
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* @return array |
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*/ |
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public function getMethodQueue() |
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{ |
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return $this->method_queue; |
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} |
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/** |
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* @return bool |
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*/ |
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public function hasPendingMethods() |
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{ |
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return !empty($this->method_queue); |
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} |
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/** |
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* @param string $method_sig |
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* @param string $args |
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* @param AMQPMessage|null $amqpMessage |
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* @return mixed |
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* @throws \PhpAmqpLib\Exception\AMQPRuntimeException |
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*/ |
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public function dispatch($method_sig, $args, $amqpMessage) |
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{ |
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if (!$this->methodMap->valid_method($method_sig)) { |
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throw new AMQPNotImplementedException(sprintf( |
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'Unknown AMQP method "%s"', |
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$method_sig |
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)); |
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} |
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$amqp_method = $this->methodMap->get_method($method_sig); |
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if (!method_exists($this, $amqp_method)) { |
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throw new AMQPNotImplementedException(sprintf( |
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'Method: "%s" not implemented by class: %s', |
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$amqp_method, |
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get_class($this) |
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)); |
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} |
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$this->dispatch_reader->reset($args); |
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if ($amqpMessage === null) { |
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return call_user_func(array($this, $amqp_method), $this->dispatch_reader); |
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} |
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return call_user_func(array($this, $amqp_method), $this->dispatch_reader, $amqpMessage); |
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} |
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/** |
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* @param int|float|null $timeout |
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* @return Frame |
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*/ |
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protected function next_frame($timeout = 0): Frame |
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{ |
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$this->debug->debug_msg('waiting for a new frame'); |
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if (!$this->frame_queue->isEmpty()) { |
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return $this->frame_queue->dequeue(); |
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} |
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return $this->connection->wait_channel($this->channel_id, $timeout); |
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} |
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/** |
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* @param array $method_sig |
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* @param \PhpAmqpLib\Wire\AMQPWriter|string $args |
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*/ |
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protected function send_method_frame($method_sig, $args = '') |
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{ |
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if ($this->connection === null) { |
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throw new AMQPChannelClosedException('Channel connection is closed.'); |
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} |
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$this->connection->send_channel_method_frame($this->channel_id, $method_sig, $args); |
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} |
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/** |
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* This is here for performance reasons to batch calls to fwrite from basic.publish |
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* |
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* @param array $method_sig |
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* @param \PhpAmqpLib\Wire\AMQPWriter|string $args |
253
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* @param \PhpAmqpLib\Wire\AMQPWriter $pkt |
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* @return \PhpAmqpLib\Wire\AMQPWriter |
255
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*/ |
256
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protected function prepare_method_frame($method_sig, $args = '', $pkt = null) |
257
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{ |
258
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return $this->connection->prepare_channel_method_frame($this->channel_id, $method_sig, $args, $pkt); |
259
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} |
260
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261
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/** |
262
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* @return AMQPMessage |
263
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* @throws \PhpAmqpLib\Exception\AMQPRuntimeException |
264
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* @throws AMQPInvalidFrameException |
265
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*/ |
266
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public function wait_content(): AMQPMessage |
267
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{ |
268
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12 |
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$frame = $this->next_frame(); |
269
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$this->validate_frame($frame, Frame::TYPE_HEADER); |
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12 |
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$payload = $frame->getPayload(); |
271
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// skip class-id and weight(4 bytes) and start from size, everything else is properties |
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// @link https://www.rabbitmq.com/resources/specs/amqp0-9-1.pdf 4.2.6.1 The Content Header |
273
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$this->msg_property_reader->reset(mb_substr($payload, 4, null, 'ASCII')); |
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274
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$size = $this->msg_property_reader->read_longlong(); |
275
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276
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return $this->createMessage( |
277
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$this->msg_property_reader, |
278
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$size |
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279
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); |
280
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} |
281
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282
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12 |
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protected function createMessage(AMQPReader $propertyReader, int $bodySize): AMQPMessage |
283
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12 |
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{ |
284
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12 |
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$body = ''; |
285
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$bodyReceivedBytes = 0; |
286
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$message = new AMQPMessage(); |
287
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$message |
288
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->load_properties($propertyReader) |
289
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->setBodySize($bodySize); |
290
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291
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while ($bodySize > $bodyReceivedBytes) { |
292
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$frame = $this->next_frame(); |
293
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12 |
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// @link https://www.rabbitmq.com/resources/specs/amqp0-9-1.pdf 4.2.6.2 The Content Body |
294
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$this->validate_frame($frame, Frame::TYPE_BODY); |
295
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12 |
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$bodyReceivedBytes += $frame->getSize(); |
296
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12 |
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297
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12 |
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if (is_int($this->maxBodySize) && $bodyReceivedBytes > $this->maxBodySize) { |
298
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$message->setIsTruncated(true); |
299
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12 |
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continue; |
300
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12 |
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} |
301
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302
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12 |
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$body .= $frame->getPayload(); |
303
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11 |
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} |
304
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305
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11 |
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$message->setBody($body); |
306
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11 |
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307
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return $message; |
308
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11 |
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} |
309
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310
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/** |
311
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* Wait for some expected AMQP methods and dispatch to them. |
312
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* Unexpected methods are queued up for later calls to this PHP |
313
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11 |
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* method. |
314
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* |
315
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* @param array|null $allowed_methods |
316
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12 |
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* @param bool $non_blocking |
317
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* @param int|float|null $timeout |
318
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12 |
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* @return mixed |
319
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* @throws \PhpAmqpLib\Exception\AMQPRuntimeException |
320
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* @throws \PhpAmqpLib\Exception\AMQPTimeoutException |
321
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* @throws \PhpAmqpLib\Exception\AMQPConnectionClosedException |
322
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* @throws AMQPOutOfBoundsException |
323
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*/ |
324
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public function wait($allowed_methods = null, $non_blocking = false, $timeout = 0) |
325
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{ |
326
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$this->debug->debug_allowed_methods($allowed_methods); |
327
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328
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$deferred = $this->process_deferred_methods($allowed_methods); |
329
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if ($deferred['dispatch'] === true) { |
330
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return $this->dispatch_deferred_method($deferred['queued_method']); |
331
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} |
332
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333
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// timeouts must be deactivated for non-blocking actions |
334
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if (true === $non_blocking) { |
335
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47 |
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$timeout = null; |
336
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} |
337
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47 |
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338
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// No deferred methods? wait for new ones |
339
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47 |
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while (true) { |
340
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47 |
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try { |
341
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$frame = $this->next_frame($timeout); |
342
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} catch (AMQPNoDataException $e) { |
343
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// no data ready for non-blocking actions - stop and exit |
344
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break; |
345
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47 |
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} catch (AMQPConnectionClosedException $exception) { |
346
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4 |
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if ($this instanceof AMQPChannel) { |
347
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$this->do_close(); |
348
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} |
349
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throw $exception; |
350
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47 |
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} |
351
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352
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47 |
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$this->validate_method_frame($frame); |
353
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13 |
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$this->validate_frame_payload($frame); |
354
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$payload = $frame->getPayload(); |
355
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8 |
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$method = $this->parseMethod($payload); |
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356
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5 |
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$method_sig = $method->getSignature(); |
357
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358
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$this->debug->debug_method_signature('> %s', $method_sig); |
359
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360
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$amqpMessage = $this->maybe_wait_for_content($method_sig); |
361
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362
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if ($this->should_dispatch_method($allowed_methods, $method_sig)) { |
363
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47 |
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return $this->dispatch($method_sig, $method->getArguments(), $amqpMessage); |
364
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47 |
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} |
365
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|
366
|
47 |
|
// Wasn't what we were looking for? save it for later |
367
|
47 |
|
$this->debug->debug_method_signature('Queueing for later: %s', $method_sig); |
368
|
|
|
$this->method_queue[] = array($method_sig, $method->getArguments(), $amqpMessage); |
369
|
47 |
|
|
370
|
|
|
if ($non_blocking) { |
371
|
47 |
|
break; |
372
|
|
|
} |
373
|
47 |
|
} |
374
|
47 |
|
} |
375
|
|
|
|
376
|
|
|
/** |
377
|
|
|
* @param array|null $allowed_methods |
378
|
|
|
* @return array |
379
|
|
|
*/ |
380
|
|
|
protected function process_deferred_methods($allowed_methods) |
381
|
|
|
{ |
382
|
|
|
$dispatch = false; |
383
|
|
|
$queued_method = array(); |
384
|
|
|
|
385
|
|
|
foreach ($this->method_queue as $qk => $qm) { |
386
|
|
|
$this->debug->debug_msg('checking queue method ' . $qk); |
387
|
|
|
|
388
|
|
|
$method_sig = $qm[0]; |
389
|
|
|
|
390
|
|
|
if ($allowed_methods === null || in_array($method_sig, $allowed_methods, true)) { |
391
|
47 |
|
unset($this->method_queue[$qk]); |
392
|
|
|
$dispatch = true; |
393
|
47 |
|
$queued_method = $qm; |
394
|
47 |
|
break; |
395
|
|
|
} |
396
|
47 |
|
} |
397
|
|
|
|
398
|
|
|
return array('dispatch' => $dispatch, 'queued_method' => $queued_method); |
399
|
|
|
} |
400
|
|
|
|
401
|
|
|
/** |
402
|
|
|
* @param array $queued_method |
403
|
|
|
* @return mixed |
404
|
|
|
*/ |
405
|
|
|
protected function dispatch_deferred_method($queued_method) |
406
|
|
|
{ |
407
|
|
|
$this->debug->debug_method_signature('Executing queued method: %s', $queued_method[0]); |
408
|
|
|
|
409
|
47 |
|
return $this->dispatch($queued_method[0], $queued_method[1], $queued_method[2]); |
410
|
|
|
} |
411
|
|
|
|
412
|
|
|
/** |
413
|
|
|
* @param Frame $frame |
414
|
|
|
* @throws \PhpAmqpLib\Exception\AMQPInvalidFrameException |
415
|
|
|
*/ |
416
|
|
|
protected function validate_method_frame(Frame $frame): void |
417
|
|
|
{ |
418
|
|
|
$this->validate_frame($frame, Frame::TYPE_METHOD); |
419
|
|
|
} |
420
|
|
|
|
421
|
|
|
/** |
422
|
|
|
* @param Frame $frame |
423
|
|
|
* @param int $expectedType |
424
|
|
|
* @throws AMQPInvalidFrameException |
425
|
|
|
*/ |
426
|
|
|
protected function validate_frame(Frame $frame, int $expectedType): void |
427
|
47 |
|
{ |
428
|
|
|
if ($frame->getType() !== $expectedType) { |
429
|
47 |
|
throw new AMQPInvalidFrameException(sprintf( |
430
|
|
|
'Expecting %u, received frame type %s (%s)', |
431
|
|
|
$expectedType, |
432
|
|
|
$frame->getType(), |
433
|
|
|
$this->constants->getFrameType($frame->getType()) |
434
|
|
|
)); |
435
|
|
|
} |
436
|
12 |
|
} |
437
|
|
|
|
438
|
12 |
|
/** |
439
|
|
|
* @param Frame $frame |
440
|
|
|
* @throws AMQPOutOfBoundsException |
441
|
|
|
* @throws AMQPInvalidFrameException |
442
|
|
|
*/ |
443
|
|
|
protected function validate_frame_payload(Frame $frame): void |
444
|
|
|
{ |
445
|
11 |
|
$payload = $frame->getPayload(); |
446
|
|
|
$payloadSize = mb_strlen($payload, 'ASCII'); |
|
|
|
|
447
|
11 |
|
if ($payloadSize < 4) { |
448
|
|
|
throw new AMQPOutOfBoundsException('Method frame too short'); |
449
|
|
|
} |
450
|
|
|
if ($payloadSize !== $frame->getSize()) { |
451
|
|
|
throw new AMQPInvalidFrameException('Frame size does not match payload'); |
452
|
|
|
} |
453
|
|
|
} |
454
|
|
|
|
455
|
47 |
|
protected function parseMethod(string $payload): Method |
456
|
|
|
{ |
457
|
47 |
|
$result = unpack('n2method/a*args', $payload); |
458
|
|
|
|
459
|
|
|
return new Method($result['method1'], $result['method2'], $result['args']); |
460
|
|
|
} |
461
|
|
|
|
462
|
|
|
/** |
463
|
|
|
* @param array|null $allowed_methods |
464
|
|
|
* @param string $method_sig |
465
|
|
|
* @return bool |
466
|
|
|
*/ |
467
|
|
|
protected function should_dispatch_method($allowed_methods, $method_sig) |
468
|
|
|
{ |
469
|
|
|
return $allowed_methods === null |
470
|
|
|
|| in_array($method_sig, $allowed_methods, true) |
471
|
47 |
|
|| $this->constants->isCloseMethod($method_sig); |
472
|
|
|
} |
473
|
47 |
|
|
474
|
|
|
/** |
475
|
|
|
* @param string $method_sig |
476
|
|
|
* @return AMQPMessage|null |
477
|
|
|
*/ |
478
|
|
|
protected function maybe_wait_for_content($method_sig) |
479
|
|
|
{ |
480
|
|
|
$amqpMessage = null; |
481
|
|
|
if ($this->constants->isContentMethod($method_sig)) { |
482
|
47 |
|
$amqpMessage = $this->wait_content(); |
483
|
|
|
} |
484
|
47 |
|
|
485
|
|
|
return $amqpMessage; |
486
|
47 |
|
} |
487
|
|
|
|
488
|
|
|
/** |
489
|
|
|
* @param callable $handler |
490
|
|
|
* @param array $arguments |
491
|
|
|
*/ |
492
|
|
|
protected function dispatch_to_handler($handler, array $arguments = []) |
493
|
47 |
|
{ |
494
|
|
|
if (is_callable($handler)) { |
495
|
47 |
|
call_user_func_array($handler, $arguments); |
496
|
|
|
} |
497
|
|
|
} |
498
|
|
|
} |
499
|
|
|
|