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9228f006d4
# Conflicts: # composer.json # composer.lock # resources/vanilla # src/CrashDump.php # src/PocketMine.php # src/pocketmine/Server.php # src/pocketmine/item/Bucket.php # src/pocketmine/item/Item.php # src/pocketmine/level/format/Chunk.php # src/pocketmine/level/format/io/leveldb/LevelDB.php # src/pocketmine/level/format/io/region/McRegion.php # src/pocketmine/network/mcpe/protocol/BatchPacket.php # src/pocketmine/tile/Furnace.php # src/pocketmine/utils/UUID.php # src/utils/ServerKiller.php
92 lines
2.7 KiB
PHP
92 lines
2.7 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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declare(strict_types=1);
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namespace pocketmine\network\mcpe\compression;
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use pocketmine\utils\AssumptionFailedError;
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use pocketmine\utils\SingletonTrait;
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use function function_exists;
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use function libdeflate_deflate_compress;
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use function strlen;
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use function zlib_decode;
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use function zlib_encode;
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use const ZLIB_ENCODING_RAW;
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final class ZlibCompressor implements Compressor{
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use SingletonTrait;
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public const DEFAULT_LEVEL = 7;
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public const DEFAULT_THRESHOLD = 256;
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public const DEFAULT_MAX_DECOMPRESSION_SIZE = 2 * 1024 * 1024;
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/**
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* @see SingletonTrait::make()
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*/
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private static function make() : self{
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return new self(self::DEFAULT_LEVEL, self::DEFAULT_THRESHOLD, self::DEFAULT_MAX_DECOMPRESSION_SIZE);
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}
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/** @var int */
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private $level;
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/** @var int */
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private $threshold;
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/** @var int */
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private $maxDecompressionSize;
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public function __construct(int $level, int $minCompressionSize, int $maxDecompressionSize){
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$this->level = $level;
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$this->threshold = $minCompressionSize;
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$this->maxDecompressionSize = $maxDecompressionSize;
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}
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public function willCompress(string $data) : bool{
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return $this->threshold > -1 and strlen($data) >= $this->threshold;
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}
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/**
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* @throws DecompressionException
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*/
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public function decompress(string $payload) : string{
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$result = @zlib_decode($payload, $this->maxDecompressionSize);
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if($result === false){
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throw new DecompressionException("Failed to decompress data");
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}
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return $result;
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}
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private static function zlib_encode(string $data, int $level) : string{
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$result = zlib_encode($data, ZLIB_ENCODING_RAW, $level);
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if($result === false) throw new AssumptionFailedError("ZLIB compression failed");
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return $result;
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}
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public function compress(string $payload) : string{
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if(function_exists('libdeflate_deflate_compress')){
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return $this->willCompress($payload) ?
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libdeflate_deflate_compress($payload, $this->level) :
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self::zlib_encode($payload, 0);
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}
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return self::zlib_encode($payload, $this->willCompress($payload) ? $this->level : 0);
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}
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}
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