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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 Predis\Command\Redis\UNLINK;
use Predis\Connection\Aggregate\ClusterInterface;
use Predis\Connection\Aggregate\RedisCluster;
use Predis\Connection\Aggregate\ReplicationInterface;
use Predis\Response\ErrorInterface;
use Predis\Response\Status;
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 Aurimas Niekis <aurimas@niekis.lt>
* @author Nicolas Grekas <p@tchwork.com>
*
* @internal
*/
trait RedisTrait
{
private static $defaultConnectionOptions = [
'class' => null,
'persistent' => 0,
'persistent_id' => null,
'timeout' => 30,
'read_timeout' => 0,
'retry_interval' => 0,
'tcp_keepalive' => 0,
'lazy' => null,
'redis_cluster' => false,
'redis_sentinel' => null,
'dbindex' => 0,
'failover' => 'none',
'ssl' => null, // see https://php.net/context.ssl
];
private $redis;
private $marshaller;
/**
* @param \Redis|\RedisArray|\RedisCluster|\Predis\ClientInterface|RedisProxy|RedisClusterProxy $redis
*/
private function init($redis, string $namespace, int $defaultLifetime, ?MarshallerInterface $marshaller)
{
parent::__construct($namespace, $defaultLifetime);
if (preg_match('#[^-+_.A-Za-z0-9]#', $namespace, $match)) {
throw new InvalidArgumentException(sprintf('RedisAdapter namespace contains "%s" but only characters in [-+_.A-Za-z0-9] are allowed.', $match[0]));
}
if (!$redis instanceof \Redis && !$redis instanceof \RedisArray && !$redis instanceof \RedisCluster && !$redis instanceof \Predis\ClientInterface && !$redis instanceof RedisProxy && !$redis instanceof RedisClusterProxy) {
throw new InvalidArgumentException(sprintf('"%s()" expects parameter 1 to be Redis, RedisArray, RedisCluster or Predis\ClientInterface, "%s" given.', __METHOD__, get_debug_type($redis)));
}
if ($redis instanceof \Predis\ClientInterface && $redis->getOptions()->exceptions) {
$options = clone $redis->getOptions();
\Closure::bind(function () { $this->options['exceptions'] = false; }, $options, $options)();
$redis = new $redis($redis->getConnection(), $options);
}
$this->redis = $redis;
$this->marshaller = $marshaller ?? new DefaultMarshaller();
}
/**
* Creates a Redis connection using a DSN configuration.
*
* Example DSN:
* - redis://localhost
* - redis://example.com:1234
* - redis://secret@example.com/13
* - redis:///var/run/redis.sock
* - redis://secret@/var/run/redis.sock/13
*
* @param array $options See self::$defaultConnectionOptions
*
* @return \Redis|\RedisArray|\RedisCluster|RedisClusterProxy|RedisProxy|\Predis\ClientInterface According to the "class" option
*
* @throws InvalidArgumentException when the DSN is invalid
*/
public static function createConnection(string $dsn, array $options = [])
{
if (str_starts_with($dsn, 'redis:')) {
$scheme = 'redis';
} elseif (str_starts_with($dsn, 'rediss:')) {
$scheme = 'rediss';
} else {
throw new InvalidArgumentException(sprintf('Invalid Redis DSN: "%s" does not start with "redis:" or "rediss".', $dsn));
}
if (!\extension_loaded('redis') && !class_exists(\Predis\Client::class)) {
throw new CacheException(sprintf('Cannot find the "redis" extension nor the "predis/predis" package: "%s".', $dsn));
}
$params = preg_replace_callback('#^'.$scheme.':(//)?(?:(?:[^:@]*+:)?([^@]*+)@)?#', function ($m) use (&$auth) {
if (isset($m[2])) {
$auth = $m[2];
if ('' === $auth) {
$auth = null;
}
}
return 'file:'.($m[1] ?? '');
}, $dsn);
if (false === $params = parse_url($params)) {
throw new InvalidArgumentException(sprintf('Invalid Redis DSN: "%s".', $dsn));
}
$query = $hosts = [];
$tls = 'rediss' === $scheme;
$tcpScheme = $tls ? 'tls' : 'tcp';
if (isset($params['query'])) {
parse_str($params['query'], $query);
if (isset($query['host'])) {
if (!\is_array($hosts = $query['host'])) {
throw new InvalidArgumentException(sprintf('Invalid Redis DSN: "%s".', $dsn));
}
foreach ($hosts as $host => $parameters) {
if (\is_string($parameters)) {
parse_str($parameters, $parameters);
}
if (false === $i = strrpos($host, ':')) {
$hosts[$host] = ['scheme' => $tcpScheme, 'host' => $host, 'port' => 6379] + $parameters;
} elseif ($port = (int) substr($host, 1 + $i)) {
$hosts[$host] = ['scheme' => $tcpScheme, 'host' => substr($host, 0, $i), 'port' => $port] + $parameters;
} else {
$hosts[$host] = ['scheme' => 'unix', 'path' => substr($host, 0, $i)] + $parameters;
}
}
$hosts = array_values($hosts);
}
}
if (isset($params['host']) || isset($params['path'])) {
if (!isset($params['dbindex']) && isset($params['path'])) {
if (preg_match('#/(\d+)$#', $params['path'], $m)) {
$params['dbindex'] = $m[1];
$params['path'] = substr($params['path'], 0, -\strlen($m[0]));
} elseif (isset($params['host'])) {
throw new InvalidArgumentException(sprintf('Invalid Redis DSN: "%s", the "dbindex" parameter must be a number.', $dsn));
}
}
if (isset($params['host'])) {
array_unshift($hosts, ['scheme' => $tcpScheme, 'host' => $params['host'], 'port' => $params['port'] ?? 6379]);
} else {
array_unshift($hosts, ['scheme' => 'unix', 'path' => $params['path']]);
}
}
if (!$hosts) {
throw new InvalidArgumentException(sprintf('Invalid Redis DSN: "%s".', $dsn));
}
$params += $query + $options + self::$defaultConnectionOptions;
if (isset($params['redis_sentinel']) && !class_exists(\Predis\Client::class) && !class_exists(\RedisSentinel::class)) {
throw new CacheException(sprintf('Redis Sentinel support requires the "predis/predis" package or the "redis" extension v5.2 or higher: "%s".', $dsn));
}
if ($params['redis_cluster'] && isset($params['redis_sentinel'])) {
throw new InvalidArgumentException(sprintf('Cannot use both "redis_cluster" and "redis_sentinel" at the same time: "%s".', $dsn));
}
if (null === $params['class'] && \extension_loaded('redis')) {
$class = $params['redis_cluster'] ? \RedisCluster::class : (1 < \count($hosts) ? \RedisArray::class : \Redis::class);
} else {
$class = $params['class'] ?? \Predis\Client::class;
}
if (is_a($class, \Redis::class, true)) {
$connect = $params['persistent'] || $params['persistent_id'] ? 'pconnect' : 'connect';
$redis = new $class();
$initializer = static function ($redis) use ($connect, $params, $dsn, $auth, $hosts, $tls) {
$host = $hosts[0]['host'] ?? $hosts[0]['path'];
$port = $hosts[0]['port'] ?? 0;
if (isset($hosts[0]['host']) && $tls) {
$host = 'tls://'.$host;
}
if (isset($params['redis_sentinel'])) {
$sentinel = new \RedisSentinel($host, $port, $params['timeout'], (string) $params['persistent_id'], $params['retry_interval'], $params['read_timeout']);
if (!$address = $sentinel->getMasterAddrByName($params['redis_sentinel'])) {
throw new InvalidArgumentException(sprintf('Failed to retrieve master information from master name "%s" and address "%s:%d".', $params['redis_sentinel'], $host, $port));
}
[$host, $port] = $address;
}
try {
@$redis->{$connect}($host, $port, $params['timeout'], (string) $params['persistent_id'], $params['retry_interval'], $params['read_timeout'], ...\defined('Redis::SCAN_PREFIX') ? [['stream' => $params['ssl'] ?? null]] : []);
set_error_handler(function ($type, $msg) use (&$error) { $error = $msg; });
try {
$isConnected = $redis->isConnected();
} finally {
restore_error_handler();
}
if (!$isConnected) {
$error = preg_match('/^Redis::p?connect\(\): (.*)/', $error, $error) ? sprintf(' (%s)', $error[1]) : '';
throw new InvalidArgumentException(sprintf('Redis connection "%s" failed: ', $dsn).$error.'.');
}
if ((null !== $auth && !$redis->auth($auth))
|| ($params['dbindex'] && !$redis->select($params['dbindex']))
) {
$e = preg_replace('/^ERR /', '', $redis->getLastError());
throw new InvalidArgumentException(sprintf('Redis connection "%s" failed: ', $dsn).$e.'.');
}
if (0 < $params['tcp_keepalive'] && \defined('Redis::OPT_TCP_KEEPALIVE')) {
$redis->setOption(\Redis::OPT_TCP_KEEPALIVE, $params['tcp_keepalive']);
}
} catch (\RedisException $e) {
throw new InvalidArgumentException(sprintf('Redis connection "%s" failed: ', $dsn).$e->getMessage());
}
return true;
};
if ($params['lazy']) {
$redis = new RedisProxy($redis, $initializer);
} else {
$initializer($redis);
}
} elseif (is_a($class, \RedisArray::class, true)) {
foreach ($hosts as $i => $host) {
switch ($host['scheme']) {
case 'tcp': $hosts[$i] = $host['host'].':'.$host['port']; break;
case 'tls': $hosts[$i] = 'tls://'.$host['host'].':'.$host['port']; break;
default: $hosts[$i] = $host['path'];
}
}
$params['lazy_connect'] = $params['lazy'] ?? true;
$params['connect_timeout'] = $params['timeout'];
try {
$redis = new $class($hosts, $params);
} catch (\RedisClusterException $e) {
throw new InvalidArgumentException(sprintf('Redis connection "%s" failed: ', $dsn).$e->getMessage());
}
if (0 < $params['tcp_keepalive'] && \defined('Redis::OPT_TCP_KEEPALIVE')) {
$redis->setOption(\Redis::OPT_TCP_KEEPALIVE, $params['tcp_keepalive']);
}
} elseif (is_a($class, \RedisCluster::class, true)) {
$initializer = static function () use ($class, $params, $dsn, $hosts) {
foreach ($hosts as $i => $host) {
switch ($host['scheme']) {
case 'tcp': $hosts[$i] = $host['host'].':'.$host['port']; break;
case 'tls': $hosts[$i] = 'tls://'.$host['host'].':'.$host['port']; break;
default: $hosts[$i] = $host['path'];
}
}
try {
$redis = new $class(null, $hosts, $params['timeout'], $params['read_timeout'], (bool) $params['persistent'], $params['auth'] ?? '', ...\defined('Redis::SCAN_PREFIX') ? [$params['ssl'] ?? null] : []);
} catch (\RedisClusterException $e) {
throw new InvalidArgumentException(sprintf('Redis connection "%s" failed: ', $dsn).$e->getMessage());
}
if (0 < $params['tcp_keepalive'] && \defined('Redis::OPT_TCP_KEEPALIVE')) {
$redis->setOption(\Redis::OPT_TCP_KEEPALIVE, $params['tcp_keepalive']);
}
switch ($params['failover']) {
case 'error': $redis->setOption(\RedisCluster::OPT_SLAVE_FAILOVER, \RedisCluster::FAILOVER_ERROR); break;
case 'distribute': $redis->setOption(\RedisCluster::OPT_SLAVE_FAILOVER, \RedisCluster::FAILOVER_DISTRIBUTE); break;
case 'slaves': $redis->setOption(\RedisCluster::OPT_SLAVE_FAILOVER, \RedisCluster::FAILOVER_DISTRIBUTE_SLAVES); break;
}
return $redis;
};
$redis = $params['lazy'] ? new RedisClusterProxy($initializer) : $initializer();
} elseif (is_a($class, \Predis\ClientInterface::class, true)) {
if ($params['redis_cluster']) {
$params['cluster'] = 'redis';
} elseif (isset($params['redis_sentinel'])) {
$params['replication'] = 'sentinel';
$params['service'] = $params['redis_sentinel'];
}
$params += ['parameters' => []];
$params['parameters'] += [
'persistent' => $params['persistent'],
'timeout' => $params['timeout'],
'read_write_timeout' => $params['read_timeout'],
'tcp_nodelay' => true,
];
if ($params['dbindex']) {
$params['parameters']['database'] = $params['dbindex'];
}
if (null !== $auth) {
$params['parameters']['password'] = $auth;
}
if (1 === \count($hosts) && !($params['redis_cluster'] || $params['redis_sentinel'])) {
$hosts = $hosts[0];
} elseif (\in_array($params['failover'], ['slaves', 'distribute'], true) && !isset($params['replication'])) {
$params['replication'] = true;
$hosts[0] += ['alias' => 'master'];
}
$params['exceptions'] = false;
$redis = new $class($hosts, array_diff_key($params, array_diff_key(self::$defaultConnectionOptions, ['ssl' => null])));
if (isset($params['redis_sentinel'])) {
$redis->getConnection()->setSentinelTimeout($params['timeout']);
}
} elseif (class_exists($class, false)) {
throw new InvalidArgumentException(sprintf('"%s" is not a subclass of "Redis", "RedisArray", "RedisCluster" nor "Predis\ClientInterface".', $class));
} else {
throw new InvalidArgumentException(sprintf('Class "%s" does not exist.', $class));
}
return $redis;
}
/**
* {@inheritdoc}
*/
protected function doFetch(array $ids)
{
if (!$ids) {
return [];
}
$result = [];
if ($this->redis instanceof \Predis\ClientInterface && $this->redis->getConnection() instanceof ClusterInterface) {
$values = $this->pipeline(function () use ($ids) {
foreach ($ids as $id) {
yield 'get' => [$id];
}
});
} else {
$values = $this->redis->mget($ids);
if (!\is_array($values) || \count($values) !== \count($ids)) {
return [];
}
$values = array_combine($ids, $values);
}
foreach ($values as $id => $v) {
if ($v) {
$result[$id] = $this->marshaller->unmarshall($v);
}
}
return $result;
}
/**
* {@inheritdoc}
*/
protected function doHave(string $id)
{
return (bool) $this->redis->exists($id);
}
/**
* {@inheritdoc}
*/
protected function doClear(string $namespace)
{
if ($this->redis instanceof \Predis\ClientInterface) {
$prefix = $this->redis->getOptions()->prefix ? $this->redis->getOptions()->prefix->getPrefix() : '';
$prefixLen = \strlen($prefix);
}
$cleared = true;
$hosts = $this->getHosts();
$host = reset($hosts);
if ($host instanceof \Predis\Client && $host->getConnection() instanceof ReplicationInterface) {
// Predis supports info command only on the master in replication environments
$hosts = [$host->getClientFor('master')];
}
foreach ($hosts as $host) {
if (!isset($namespace[0])) {
$cleared = $host->flushDb() && $cleared;
continue;
}
$info = $host->info('Server');
$info = !$info instanceof ErrorInterface ? $info['Server'] ?? $info : ['redis_version' => '2.0'];
if (!$host instanceof \Predis\ClientInterface) {
$prefix = \defined('Redis::SCAN_PREFIX') && (\Redis::SCAN_PREFIX & $host->getOption(\Redis::OPT_SCAN)) ? '' : $host->getOption(\Redis::OPT_PREFIX);
$prefixLen = \strlen($host->getOption(\Redis::OPT_PREFIX) ?? '');
}
$pattern = $prefix.$namespace.'*';
if (!version_compare($info['redis_version'], '2.8', '>=')) {
// As documented in Redis documentation (http://redis.io/commands/keys) using KEYS
// can hang your server when it is executed against large databases (millions of items).
// Whenever you hit this scale, you should really consider upgrading to Redis 2.8 or above.
$unlink = version_compare($info['redis_version'], '4.0', '>=') ? 'UNLINK' : 'DEL';
$args = $this->redis instanceof \Predis\ClientInterface ? [0, $pattern] : [[$pattern], 0];
$cleared = $host->eval("local keys=redis.call('KEYS',ARGV[1]) for i=1,#keys,5000 do redis.call('$unlink',unpack(keys,i,math.min(i+4999,#keys))) end return 1", $args[0], $args[1]) && $cleared;
continue;
}
$cursor = null;
do {
$keys = $host instanceof \Predis\ClientInterface ? $host->scan($cursor, 'MATCH', $pattern, 'COUNT', 1000) : $host->scan($cursor, $pattern, 1000);
if (isset($keys[1]) && \is_array($keys[1])) {
$cursor = $keys[0];
$keys = $keys[1];
}
if ($keys) {
if ($prefixLen) {
foreach ($keys as $i => $key) {
$keys[$i] = substr($key, $prefixLen);
}
}
$this->doDelete($keys);
}
} while ($cursor = (int) $cursor);
}
return $cleared;
}
/**
* {@inheritdoc}
*/
protected function doDelete(array $ids)
{
if (!$ids) {
return true;
}
if ($this->redis instanceof \Predis\ClientInterface && $this->redis->getConnection() instanceof ClusterInterface) {
static $del;
$del = $del ?? (class_exists(UNLINK::class) ? 'unlink' : 'del');
$this->pipeline(function () use ($ids, $del) {
foreach ($ids as $id) {
yield $del => [$id];
}
})->rewind();
} else {
static $unlink = true;
if ($unlink) {
try {
$unlink = false !== $this->redis->unlink($ids);
} catch (\Throwable $e) {
$unlink = false;
}
}
if (!$unlink) {
$this->redis->del($ids);
}
}
return true;
}
/**
* {@inheritdoc}
*/
protected function doSave(array $values, int $lifetime)
{
if (!$values = $this->marshaller->marshall($values, $failed)) {
return $failed;
}
$results = $this->pipeline(function () use ($values, $lifetime) {
foreach ($values as $id => $value) {
if (0 >= $lifetime) {
yield 'set' => [$id, $value];
} else {
yield 'setEx' => [$id, $lifetime, $value];
}
}
});
foreach ($results as $id => $result) {
if (true !== $result && (!$result instanceof Status || Status::get('OK') !== $result)) {
$failed[] = $id;
}
}
return $failed;
}
private function pipeline(\Closure $generator, object $redis = null): \Generator
{
$ids = [];
$redis = $redis ?? $this->redis;
if ($redis instanceof RedisClusterProxy || $redis instanceof \RedisCluster || ($redis instanceof \Predis\ClientInterface && $redis->getConnection() instanceof RedisCluster)) {
// phpredis & predis don't support pipelining with RedisCluster
// see https://github.com/phpredis/phpredis/blob/develop/cluster.markdown#pipelining
// see https://github.com/nrk/predis/issues/267#issuecomment-123781423
$results = [];
foreach ($generator() as $command => $args) {
$results[] = $redis->{$command}(...$args);
$ids[] = 'eval' === $command ? ($redis instanceof \Predis\ClientInterface ? $args[2] : $args[1][0]) : $args[0];
}
} elseif ($redis instanceof \Predis\ClientInterface) {
$results = $redis->pipeline(static function ($redis) use ($generator, &$ids) {
foreach ($generator() as $command => $args) {
$redis->{$command}(...$args);
$ids[] = 'eval' === $command ? $args[2] : $args[0];
}
});
} elseif ($redis instanceof \RedisArray) {
$connections = $results = $ids = [];
foreach ($generator() as $command => $args) {
$id = 'eval' === $command ? $args[1][0] : $args[0];
if (!isset($connections[$h = $redis->_target($id)])) {
$connections[$h] = [$redis->_instance($h), -1];
$connections[$h][0]->multi(\Redis::PIPELINE);
}
$connections[$h][0]->{$command}(...$args);
$results[] = [$h, ++$connections[$h][1]];
$ids[] = $id;
}
foreach ($connections as $h => $c) {
$connections[$h] = $c[0]->exec();
}
foreach ($results as $k => [$h, $c]) {
$results[$k] = $connections[$h][$c];
}
} else {
$redis->multi(\Redis::PIPELINE);
foreach ($generator() as $command => $args) {
$redis->{$command}(...$args);
$ids[] = 'eval' === $command ? $args[1][0] : $args[0];
}
$results = $redis->exec();
}
if (!$redis instanceof \Predis\ClientInterface && 'eval' === $command && $redis->getLastError()) {
$e = new \RedisException($redis->getLastError());
$results = array_map(function ($v) use ($e) { return false === $v ? $e : $v; }, $results);
}
foreach ($ids as $k => $id) {
yield $id => $results[$k];
}
}
private function getHosts(): array
{
$hosts = [$this->redis];
if ($this->redis instanceof \Predis\ClientInterface) {
$connection = $this->redis->getConnection();
if ($connection instanceof ClusterInterface && $connection instanceof \Traversable) {
$hosts = [];
foreach ($connection as $c) {
$hosts[] = new \Predis\Client($c);
}
}
} elseif ($this->redis instanceof \RedisArray) {
$hosts = [];
foreach ($this->redis->_hosts() as $host) {
$hosts[] = $this->redis->_instance($host);
}
} elseif ($this->redis instanceof RedisClusterProxy || $this->redis instanceof \RedisCluster) {
$hosts = [];
foreach ($this->redis->_masters() as $host) {
$hosts[] = new RedisClusterNodeProxy($host, $this->redis);
}
}
return $hosts;
}
}