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354 lines
14 KiB
354 lines
14 KiB
2 years ago
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Cache\Adapter;
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use Symfony\Component\Cache\Exception\CacheException;
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use Symfony\Component\Cache\Exception\InvalidArgumentException;
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use Symfony\Component\Cache\Marshaller\DefaultMarshaller;
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use Symfony\Component\Cache\Marshaller\MarshallerInterface;
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/**
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* @author Rob Frawley 2nd <rmf@src.run>
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class MemcachedAdapter extends AbstractAdapter
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{
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/**
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* We are replacing characters that are illegal in Memcached keys with reserved characters from
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* {@see \Symfony\Contracts\Cache\ItemInterface::RESERVED_CHARACTERS} that are legal in Memcached.
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* Note: don’t use {@see \Symfony\Component\Cache\Adapter\AbstractAdapter::NS_SEPARATOR}.
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*/
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private const RESERVED_MEMCACHED = " \n\r\t\v\f\0";
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private const RESERVED_PSR6 = '@()\{}/';
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protected $maxIdLength = 250;
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private const DEFAULT_CLIENT_OPTIONS = [
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'persistent_id' => null,
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'username' => null,
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'password' => null,
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\Memcached::OPT_SERIALIZER => \Memcached::SERIALIZER_PHP,
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];
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private $marshaller;
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private $client;
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private $lazyClient;
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/**
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* Using a MemcachedAdapter with a TagAwareAdapter for storing tags is discouraged.
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* Using a RedisAdapter is recommended instead. If you cannot do otherwise, be aware that:
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* - the Memcached::OPT_BINARY_PROTOCOL must be enabled
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* (that's the default when using MemcachedAdapter::createConnection());
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* - tags eviction by Memcached's LRU algorithm will break by-tags invalidation;
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* your Memcached memory should be large enough to never trigger LRU.
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*
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* Using a MemcachedAdapter as a pure items store is fine.
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*/
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public function __construct(\Memcached $client, string $namespace = '', int $defaultLifetime = 0, MarshallerInterface $marshaller = null)
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{
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if (!static::isSupported()) {
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throw new CacheException('Memcached '.(\PHP_VERSION_ID >= 80100 ? '> 3.1.5' : '>= 2.2.0').' is required.');
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}
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if ('Memcached' === \get_class($client)) {
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$opt = $client->getOption(\Memcached::OPT_SERIALIZER);
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if (\Memcached::SERIALIZER_PHP !== $opt && \Memcached::SERIALIZER_IGBINARY !== $opt) {
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throw new CacheException('MemcachedAdapter: "serializer" option must be "php" or "igbinary".');
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}
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$this->maxIdLength -= \strlen($client->getOption(\Memcached::OPT_PREFIX_KEY));
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$this->client = $client;
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} else {
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$this->lazyClient = $client;
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}
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parent::__construct($namespace, $defaultLifetime);
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$this->enableVersioning();
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$this->marshaller = $marshaller ?? new DefaultMarshaller();
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}
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public static function isSupported()
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{
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return \extension_loaded('memcached') && version_compare(phpversion('memcached'), \PHP_VERSION_ID >= 80100 ? '3.1.6' : '2.2.0', '>=');
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}
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/**
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* Creates a Memcached instance.
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*
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* By default, the binary protocol, no block, and libketama compatible options are enabled.
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*
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* Examples for servers:
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* - 'memcached://user:pass@localhost?weight=33'
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* - [['localhost', 11211, 33]]
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*
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* @param array[]|string|string[] $servers An array of servers, a DSN, or an array of DSNs
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*
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* @return \Memcached
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*
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* @throws \ErrorException When invalid options or servers are provided
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*/
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public static function createConnection($servers, array $options = [])
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{
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if (\is_string($servers)) {
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$servers = [$servers];
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} elseif (!\is_array($servers)) {
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throw new InvalidArgumentException(sprintf('MemcachedAdapter::createClient() expects array or string as first argument, "%s" given.', get_debug_type($servers)));
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}
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if (!static::isSupported()) {
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throw new CacheException('Memcached '.(\PHP_VERSION_ID >= 80100 ? '> 3.1.5' : '>= 2.2.0').' is required.');
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}
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set_error_handler(function ($type, $msg, $file, $line) { throw new \ErrorException($msg, 0, $type, $file, $line); });
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try {
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$options += static::DEFAULT_CLIENT_OPTIONS;
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$client = new \Memcached($options['persistent_id']);
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$username = $options['username'];
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$password = $options['password'];
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// parse any DSN in $servers
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foreach ($servers as $i => $dsn) {
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if (\is_array($dsn)) {
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continue;
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}
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if (!str_starts_with($dsn, 'memcached:')) {
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throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: "%s" does not start with "memcached:".', $dsn));
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}
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$params = preg_replace_callback('#^memcached:(//)?(?:([^@]*+)@)?#', function ($m) use (&$username, &$password) {
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if (!empty($m[2])) {
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[$username, $password] = explode(':', $m[2], 2) + [1 => null];
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}
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return 'file:'.($m[1] ?? '');
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}, $dsn);
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if (false === $params = parse_url($params)) {
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throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: "%s".', $dsn));
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}
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$query = $hosts = [];
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if (isset($params['query'])) {
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parse_str($params['query'], $query);
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if (isset($query['host'])) {
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if (!\is_array($hosts = $query['host'])) {
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throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: "%s".', $dsn));
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}
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foreach ($hosts as $host => $weight) {
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if (false === $port = strrpos($host, ':')) {
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$hosts[$host] = [$host, 11211, (int) $weight];
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} else {
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$hosts[$host] = [substr($host, 0, $port), (int) substr($host, 1 + $port), (int) $weight];
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}
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}
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$hosts = array_values($hosts);
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unset($query['host']);
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}
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if ($hosts && !isset($params['host']) && !isset($params['path'])) {
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unset($servers[$i]);
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$servers = array_merge($servers, $hosts);
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continue;
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}
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}
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if (!isset($params['host']) && !isset($params['path'])) {
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throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: "%s".', $dsn));
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}
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if (isset($params['path']) && preg_match('#/(\d+)$#', $params['path'], $m)) {
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$params['weight'] = $m[1];
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$params['path'] = substr($params['path'], 0, -\strlen($m[0]));
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}
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$params += [
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'host' => $params['host'] ?? $params['path'],
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'port' => isset($params['host']) ? 11211 : null,
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'weight' => 0,
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];
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if ($query) {
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$params += $query;
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$options = $query + $options;
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}
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$servers[$i] = [$params['host'], $params['port'], $params['weight']];
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if ($hosts) {
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$servers = array_merge($servers, $hosts);
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}
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}
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// set client's options
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unset($options['persistent_id'], $options['username'], $options['password'], $options['weight'], $options['lazy']);
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$options = array_change_key_case($options, \CASE_UPPER);
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$client->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
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$client->setOption(\Memcached::OPT_NO_BLOCK, true);
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$client->setOption(\Memcached::OPT_TCP_NODELAY, true);
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if (!\array_key_exists('LIBKETAMA_COMPATIBLE', $options) && !\array_key_exists(\Memcached::OPT_LIBKETAMA_COMPATIBLE, $options)) {
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$client->setOption(\Memcached::OPT_LIBKETAMA_COMPATIBLE, true);
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}
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foreach ($options as $name => $value) {
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if (\is_int($name)) {
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continue;
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}
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if ('HASH' === $name || 'SERIALIZER' === $name || 'DISTRIBUTION' === $name) {
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$value = \constant('Memcached::'.$name.'_'.strtoupper($value));
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}
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unset($options[$name]);
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if (\defined('Memcached::OPT_'.$name)) {
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$options[\constant('Memcached::OPT_'.$name)] = $value;
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}
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}
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$client->setOptions($options);
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// set client's servers, taking care of persistent connections
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if (!$client->isPristine()) {
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$oldServers = [];
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foreach ($client->getServerList() as $server) {
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$oldServers[] = [$server['host'], $server['port']];
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}
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$newServers = [];
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foreach ($servers as $server) {
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if (1 < \count($server)) {
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$server = array_values($server);
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unset($server[2]);
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$server[1] = (int) $server[1];
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}
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$newServers[] = $server;
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}
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if ($oldServers !== $newServers) {
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$client->resetServerList();
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$client->addServers($servers);
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}
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} else {
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$client->addServers($servers);
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}
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if (null !== $username || null !== $password) {
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if (!method_exists($client, 'setSaslAuthData')) {
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trigger_error('Missing SASL support: the memcached extension must be compiled with --enable-memcached-sasl.');
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}
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$client->setSaslAuthData($username, $password);
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}
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return $client;
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} finally {
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restore_error_handler();
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}
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}
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/**
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* {@inheritdoc}
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*/
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protected function doSave(array $values, int $lifetime)
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{
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if (!$values = $this->marshaller->marshall($values, $failed)) {
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return $failed;
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}
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if ($lifetime && $lifetime > 30 * 86400) {
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$lifetime += time();
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}
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$encodedValues = [];
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foreach ($values as $key => $value) {
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$encodedValues[self::encodeKey($key)] = $value;
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}
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return $this->checkResultCode($this->getClient()->setMulti($encodedValues, $lifetime)) ? $failed : false;
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}
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/**
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* {@inheritdoc}
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*/
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protected function doFetch(array $ids)
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{
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try {
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$encodedIds = array_map([__CLASS__, 'encodeKey'], $ids);
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$encodedResult = $this->checkResultCode($this->getClient()->getMulti($encodedIds));
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$result = [];
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foreach ($encodedResult as $key => $value) {
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$result[self::decodeKey($key)] = $this->marshaller->unmarshall($value);
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}
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return $result;
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} catch (\Error $e) {
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throw new \ErrorException($e->getMessage(), $e->getCode(), \E_ERROR, $e->getFile(), $e->getLine());
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}
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}
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/**
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* {@inheritdoc}
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*/
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protected function doHave(string $id)
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{
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return false !== $this->getClient()->get(self::encodeKey($id)) || $this->checkResultCode(\Memcached::RES_SUCCESS === $this->client->getResultCode());
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}
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/**
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* {@inheritdoc}
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*/
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protected function doDelete(array $ids)
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{
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$ok = true;
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$encodedIds = array_map([__CLASS__, 'encodeKey'], $ids);
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foreach ($this->checkResultCode($this->getClient()->deleteMulti($encodedIds)) as $result) {
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if (\Memcached::RES_SUCCESS !== $result && \Memcached::RES_NOTFOUND !== $result) {
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$ok = false;
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}
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}
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return $ok;
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}
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/**
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* {@inheritdoc}
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||
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*/
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protected function doClear(string $namespace)
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{
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return '' === $namespace && $this->getClient()->flush();
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}
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||
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private function checkResultCode($result)
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{
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$code = $this->client->getResultCode();
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if (\Memcached::RES_SUCCESS === $code || \Memcached::RES_NOTFOUND === $code) {
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return $result;
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}
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throw new CacheException('MemcachedAdapter client error: '.strtolower($this->client->getResultMessage()));
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}
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private function getClient(): \Memcached
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{
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if ($this->client) {
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return $this->client;
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}
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$opt = $this->lazyClient->getOption(\Memcached::OPT_SERIALIZER);
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if (\Memcached::SERIALIZER_PHP !== $opt && \Memcached::SERIALIZER_IGBINARY !== $opt) {
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throw new CacheException('MemcachedAdapter: "serializer" option must be "php" or "igbinary".');
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}
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if ('' !== $prefix = (string) $this->lazyClient->getOption(\Memcached::OPT_PREFIX_KEY)) {
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throw new CacheException(sprintf('MemcachedAdapter: "prefix_key" option must be empty when using proxified connections, "%s" given.', $prefix));
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}
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return $this->client = $this->lazyClient;
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}
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private static function encodeKey(string $key): string
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||
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{
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return strtr($key, self::RESERVED_MEMCACHED, self::RESERVED_PSR6);
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||
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}
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||
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private static function decodeKey(string $key): string
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||
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|
{
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||
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return strtr($key, self::RESERVED_PSR6, self::RESERVED_MEMCACHED);
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||
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}
|
||
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}
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