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<?php |
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namespace Puzzle\AMQP\Messages\Processors; |
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use Puzzle\AMQP\WritableMessage; |
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use Puzzle\AMQP\Messages\Bodies\Binary; |
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use Psr\Log\LoggerAwareTrait; |
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use Psr\Log\NullLogger; |
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use Puzzle\Pieces\StringManipulation; |
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use Puzzle\AMQP\Messages\OnPublishProcessor; |
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use Puzzle\AMQP\Messages\OnConsumeProcessor; |
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use Puzzle\AMQP\ReadableMessage; |
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use Puzzle\AMQP\Workers\ReadableMessageModifier; |
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use Puzzle\AMQP\Messages\BodyFactory; |
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class GZip implements OnPublishProcessor, OnConsumeProcessor |
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{ |
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use |
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LoggerAwareTrait, |
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StringManipulation; |
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const |
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HEADER_COMPRESSION = 'compression', |
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HEADER_COMPRESSION_CONTENT_TYPE = 'compression_content-type', |
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COMPRESSION_ALGORITHM = 'gzip'; |
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private |
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$compressionLevel, |
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$encodingMode; |
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public function __construct() |
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{ |
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$this->compressionLevel = -1; |
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$this->encodingMode = FORCE_GZIP; |
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$this->logger = new NullLogger(); |
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} |
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/** |
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* @return self |
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*/ |
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public function setCompressionLevel($compressionLevel = -1) |
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{ |
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if(! $this->isCompressionLevelValid($compressionLevel)) |
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{ |
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$this->logWarning(sprintf( |
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"Invalid compression level (%s)", |
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$this->convertToString($compressionLevel) |
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)); |
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return $this; |
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} |
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$this->compressionLevel = (int) $compressionLevel; |
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return $this; |
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} |
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private function isCompressionLevelValid($level) |
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{ |
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return is_numeric($level) && $level >= -1 && $level <= 9; |
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} |
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private function logWarning($message) |
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{ |
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$this->logger->warning(sprintf( |
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"[%s] : %s", |
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"PROCESSOR " . __CLASS__, |
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$message |
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)); |
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} |
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public function setEncodingMode($mode) |
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{ |
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if(! is_scalar($mode) || ! in_array($mode, [FORCE_GZIP, FORCE_DEFLATE])) |
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{ |
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$this->logWarning(sprintf( |
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"Invalid encoding mode (%s)", |
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$this->convertToString($mode) |
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)); |
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return $this; |
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} |
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$this->encodingMode = $mode; |
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return $this; |
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} |
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public function onPublish(WritableMessage $message) |
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{ |
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if($message->isCompressionAllowed() === false) |
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{ |
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return; |
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} |
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$compressedContent = gzencode($message->getBodyInTransportFormat(), $this->compressionLevel); |
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$this->updateCompressedMessage($message, $compressedContent); |
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} |
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private function updateCompressedMessage(WritableMessage $message, $compressedContent) |
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{ |
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$message->addHeaders([ |
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self::HEADER_COMPRESSION => self::COMPRESSION_ALGORITHM, |
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self::HEADER_COMPRESSION_CONTENT_TYPE => $message->getContentType(), |
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]); |
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$message->setBody(new Binary($compressedContent)); |
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} |
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public function onConsume(ReadableMessage $message) |
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{ |
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if($this->isCompressed($message)) |
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{ |
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$message = $this->updateUncompressedMessage( |
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$message, |
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gzdecode($message->getBodyInOriginalFormat()) |
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); |
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} |
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return $message; |
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} |
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private function isCompressed(ReadableMessage $message) |
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{ |
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$headers = $message->getHeaders(); |
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if(isset($headers[self::HEADER_COMPRESSION]) |
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&& isset($headers[self::HEADER_COMPRESSION_CONTENT_TYPE])) |
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{ |
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return self::COMPRESSION_ALGORITHM === $headers[self::HEADER_COMPRESSION]; |
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} |
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return false; |
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} |
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private function updateUncompressedMessage(ReadableMessage $message, $uncompressedContent) |
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{ |
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$builder = new ReadableMessageModifier($message); |
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$headers = $message->getHeaders(); |
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$newContentType = $headers[self::HEADER_COMPRESSION_CONTENT_TYPE]; |
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$newBody = (new BodyFactory())->create($newContentType, $uncompressedContent); |
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$builder |
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->changeBody($newBody) |
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->changeAttribute('content_type', $newContentType) |
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->dropHeader(self::HEADER_COMPRESSION) |
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->dropHeader(self::HEADER_COMPRESSION_CONTENT_TYPE); |
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return $builder->build(); |
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} |
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} |
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puzzle-org /
amqp
