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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Cache\Traits;
use Symfony\Component\Cache\Exception\CacheException;
use Symfony\Component\Cache\Exception\InvalidArgumentException;
use Symfony\Component\Cache\Marshaller\DefaultMarshaller;
use Symfony\Component\Cache\Marshaller\MarshallerInterface;
/**
* @author Rob Frawley 2nd <rmf@src.run>
* @author Nicolas Grekas <p@tchwork.com>
*
* @internal
*/
trait MemcachedTrait
{
private static $defaultClientOptions = [
'persistent_id' => null,
'username' => null,
'password' => null,
'serializer' => 'php',
];
private $marshaller;
private $client;
private $lazyClient;
public static function isSupported()
{
return \extension_loaded('memcached') && version_compare(phpversion('memcached'), '2.2.0', '>=');
}
private function init(\Memcached $client, $namespace, $defaultLifetime, ?MarshallerInterface $marshaller)
{
if (!static::isSupported()) {
throw new CacheException('Memcached >= 2.2.0 is required');
}
if ('Memcached' === \get_class($client)) {
$opt = $client->getOption(\Memcached::OPT_SERIALIZER);
if (\Memcached::SERIALIZER_PHP !== $opt && \Memcached::SERIALIZER_IGBINARY !== $opt) {
throw new CacheException('MemcachedAdapter: "serializer" option must be "php" or "igbinary".');
}
$this->maxIdLength -= \strlen($client->getOption(\Memcached::OPT_PREFIX_KEY));
$this->client = $client;
} else {
$this->lazyClient = $client;
}
parent::__construct($namespace, $defaultLifetime);
$this->enableVersioning();
$this->marshaller = $marshaller ?? new DefaultMarshaller();
}
/**
* Creates a Memcached instance.
*
* By default, the binary protocol, no block, and libketama compatible options are enabled.
*
* Examples for servers:
* - 'memcached://user:pass@localhost?weight=33'
* - [['localhost', 11211, 33]]
*
* @param array[]|string|string[] $servers An array of servers, a DSN, or an array of DSNs
* @param array $options An array of options
*
* @return \Memcached
*
* @throws \ErrorException When invalid options or servers are provided
*/
public static function createConnection($servers, array $options = [])
{
if (\is_string($servers)) {
$servers = [$servers];
} elseif (!\is_array($servers)) {
throw new InvalidArgumentException(sprintf('MemcachedAdapter::createClient() expects array or string as first argument, %s given.', \gettype($servers)));
}
if (!static::isSupported()) {
throw new CacheException('Memcached >= 2.2.0 is required');
}
set_error_handler(function ($type, $msg, $file, $line) { throw new \ErrorException($msg, 0, $type, $file, $line); });
try {
$options += static::$defaultClientOptions;
$client = new \Memcached($options['persistent_id']);
$username = $options['username'];
$password = $options['password'];
// parse any DSN in $servers
foreach ($servers as $i => $dsn) {
if (\is_array($dsn)) {
continue;
}
if (0 !== strpos($dsn, 'memcached:')) {
throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: %s does not start with "memcached:"', $dsn));
}
$params = preg_replace_callback('#^memcached:(//)?(?:([^@]*+)@)?#', function ($m) use (&$username, &$password) {
if (!empty($m[2])) {
list($username, $password) = explode(':', $m[2], 2) + [1 => null];
}
return 'file:'.($m[1] ?? '');
}, $dsn);
if (false === $params = parse_url($params)) {
throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: %s', $dsn));
}
$query = $hosts = [];
if (isset($params['query'])) {
parse_str($params['query'], $query);
if (isset($query['host'])) {
if (!\is_array($hosts = $query['host'])) {
throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: %s', $dsn));
}
foreach ($hosts as $host => $weight) {
if (false === $port = strrpos($host, ':')) {
$hosts[$host] = [$host, 11211, (int) $weight];
} else {
$hosts[$host] = [substr($host, 0, $port), (int) substr($host, 1 + $port), (int) $weight];
}
}
$hosts = array_values($hosts);
unset($query['host']);
}
if ($hosts && !isset($params['host']) && !isset($params['path'])) {
unset($servers[$i]);
$servers = array_merge($servers, $hosts);
continue;
}
}
if (!isset($params['host']) && !isset($params['path'])) {
throw new InvalidArgumentException(sprintf('Invalid Memcached DSN: %s', $dsn));
}
if (isset($params['path']) && preg_match('#/(\d+)$#', $params['path'], $m)) {
$params['weight'] = $m[1];
$params['path'] = substr($params['path'], 0, -\strlen($m[0]));
}
$params += [
'host' => isset($params['host']) ? $params['host'] : $params['path'],
'port' => isset($params['host']) ? 11211 : null,
'weight' => 0,
];
if ($query) {
$params += $query;
$options = $query + $options;
}
$servers[$i] = [$params['host'], $params['port'], $params['weight']];
if ($hosts) {
$servers = array_merge($servers, $hosts);
}
}
// set client's options
unset($options['persistent_id'], $options['username'], $options['password'], $options['weight'], $options['lazy']);
$options = array_change_key_case($options, CASE_UPPER);
$client->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
$client->setOption(\Memcached::OPT_NO_BLOCK, true);
$client->setOption(\Memcached::OPT_TCP_NODELAY, true);
if (!\array_key_exists('LIBKETAMA_COMPATIBLE', $options) && !\array_key_exists(\Memcached::OPT_LIBKETAMA_COMPATIBLE, $options)) {
$client->setOption(\Memcached::OPT_LIBKETAMA_COMPATIBLE, true);
}
foreach ($options as $name => $value) {
if (\is_int($name)) {
continue;
}
if ('HASH' === $name || 'SERIALIZER' === $name || 'DISTRIBUTION' === $name) {
$value = \constant('Memcached::'.$name.'_'.strtoupper($value));
}
$opt = \constant('Memcached::OPT_'.$name);
unset($options[$name]);
$options[$opt] = $value;
}
$client->setOptions($options);
// set client's servers, taking care of persistent connections
if (!$client->isPristine()) {
$oldServers = [];
foreach ($client->getServerList() as $server) {
$oldServers[] = [$server['host'], $server['port']];
}
$newServers = [];
foreach ($servers as $server) {
if (1 < \count($server)) {
$server = array_values($server);
unset($server[2]);
$server[1] = (int) $server[1];
}
$newServers[] = $server;
}
if ($oldServers !== $newServers) {
$client->resetServerList();
$client->addServers($servers);
}
} else {
$client->addServers($servers);
}
if (null !== $username || null !== $password) {
if (!method_exists($client, 'setSaslAuthData')) {
trigger_error('Missing SASL support: the memcached extension must be compiled with --enable-memcached-sasl.');
}
$client->setSaslAuthData($username, $password);
}
return $client;
} finally {
restore_error_handler();
}
}
/**
* {@inheritdoc}
*/
protected function doSave(array $values, $lifetime)
{
if (!$values = $this->marshaller->marshall($values, $failed)) {
return $failed;
}
if ($lifetime && $lifetime > 30 * 86400) {
$lifetime += time();
}
$encodedValues = [];
foreach ($values as $key => $value) {
$encodedValues[rawurlencode($key)] = $value;
}
return $this->checkResultCode($this->getClient()->setMulti($encodedValues, $lifetime)) ? $failed : false;
}
/**
* {@inheritdoc}
*/
protected function doFetch(array $ids)
{
try {
$encodedIds = array_map('rawurlencode', $ids);
$encodedResult = $this->checkResultCode($this->getClient()->getMulti($encodedIds));
$result = [];
foreach ($encodedResult as $key => $value) {
$result[rawurldecode($key)] = $this->marshaller->unmarshall($value);
}
return $result;
} catch (\Error $e) {
throw new \ErrorException($e->getMessage(), $e->getCode(), E_ERROR, $e->getFile(), $e->getLine());
}
}
/**
* {@inheritdoc}
*/
protected function doHave($id)
{
return false !== $this->getClient()->get(rawurlencode($id)) || $this->checkResultCode(\Memcached::RES_SUCCESS === $this->client->getResultCode());
}
/**
* {@inheritdoc}
*/
protected function doDelete(array $ids)
{
$ok = true;
$encodedIds = array_map('rawurlencode', $ids);
foreach ($this->checkResultCode($this->getClient()->deleteMulti($encodedIds)) as $result) {
if (\Memcached::RES_SUCCESS !== $result && \Memcached::RES_NOTFOUND !== $result) {
$ok = false;
}
}
return $ok;
}
/**
* {@inheritdoc}
*/
protected function doClear($namespace)
{
return '' === $namespace && $this->getClient()->flush();
}
private function checkResultCode($result)
{
$code = $this->client->getResultCode();
if (\Memcached::RES_SUCCESS === $code || \Memcached::RES_NOTFOUND === $code) {
return $result;
}
throw new CacheException(sprintf('MemcachedAdapter client error: %s.', strtolower($this->client->getResultMessage())));
}
/**
* @return \Memcached
*/
private function getClient()
{
if ($this->client) {
return $this->client;
}
$opt = $this->lazyClient->getOption(\Memcached::OPT_SERIALIZER);
if (\Memcached::SERIALIZER_PHP !== $opt && \Memcached::SERIALIZER_IGBINARY !== $opt) {
throw new CacheException('MemcachedAdapter: "serializer" option must be "php" or "igbinary".');
}
if ('' !== $prefix = (string) $this->lazyClient->getOption(\Memcached::OPT_PREFIX_KEY)) {
throw new CacheException(sprintf('MemcachedAdapter: "prefix_key" option must be empty when using proxified connections, "%s" given.', $prefix));
}
return $this->client = $this->lazyClient;
}
}
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