* @author Christoph Wurst * @author Jörn Friedrich Dreyer * @author Morris Jobke * @author Robin Appelman * @author Robin McCorkell * * @license AGPL-3.0 * * This code is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License, version 3, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License, version 3, * along with this program. If not, see * */ namespace OC; use OCP\Diagnostics\IEventLogger; class RedisFactory { public const REDIS_MINIMAL_VERSION = '3.1.3'; public const REDIS_EXTRA_PARAMETERS_MINIMAL_VERSION = '5.3.0'; /** @var \Redis|\RedisCluster */ private $instance; private SystemConfig $config; private IEventLogger $eventLogger; /** * RedisFactory constructor. * * @param SystemConfig $config */ public function __construct(SystemConfig $config, IEventLogger $eventLogger) { $this->config = $config; $this->eventLogger = $eventLogger; } private function create() { $isCluster = in_array('redis.cluster', $this->config->getKeys(), true); $config = $isCluster ? $this->config->getValue('redis.cluster', []) : $this->config->getValue('redis', []); if ($isCluster && !class_exists('RedisCluster')) { throw new \Exception('Redis Cluster support is not available'); } if (isset($config['timeout'])) { $timeout = $config['timeout']; } else { $timeout = 0.0; } if (isset($config['read_timeout'])) { $readTimeout = $config['read_timeout']; } else { $readTimeout = 0.0; } $auth = null; if (isset($config['password']) && $config['password'] !== '') { if (isset($config['user']) && $config['user'] !== '') { $auth = [$config['user'], $config['password']]; } else { $auth = $config['password']; } } // # TLS support // # https://github.com/phpredis/phpredis/issues/1600 $connectionParameters = $this->getSslContext($config); // cluster config if ($isCluster) { if (!isset($config['seeds'])) { throw new \Exception('Redis cluster config is missing the "seeds" attribute'); } // Support for older phpredis versions not supporting connectionParameters if ($connectionParameters !== null) { $this->instance = new \RedisCluster(null, $config['seeds'], $timeout, $readTimeout, true, $auth, $connectionParameters); } else { $this->instance = new \RedisCluster(null, $config['seeds'], $timeout, $readTimeout, true, $auth); } if (isset($config['failover_mode'])) { $this->instance->setOption(\RedisCluster::OPT_SLAVE_FAILOVER, $config['failover_mode']); } } else { $this->instance = new \Redis(); if (isset($config['host'])) { $host = $config['host']; } else { $host = '127.0.0.1'; } if (isset($config['port'])) { $port = $config['port']; } elseif ($host[0] !== '/') { $port = 6379; } else { $port = null; } $this->eventLogger->start('connect:redis', 'Connect to redis and send AUTH, SELECT'); // Support for older phpredis versions not supporting connectionParameters if ($connectionParameters !== null) { // Non-clustered redis requires connection parameters to be wrapped inside `stream` $connectionParameters = [ 'stream' => $this->getSslContext($config) ]; /** * even though the stubs and documentation don't want you to know this, * pconnect does have the same $connectionParameters argument connect has * * https://github.com/phpredis/phpredis/blob/0264de1824b03fb2d0ad515b4d4ec019cd2dae70/redis.c#L710-L730 * * @psalm-suppress TooManyArguments */ $this->instance->pconnect($host, $port, $timeout, null, 0, $readTimeout, $connectionParameters); } else { $this->instance->pconnect($host, $port, $timeout, null, 0, $readTimeout); } // Auth if configured if ($auth !== null) { $this->instance->auth($auth); } if (isset($config['dbindex'])) { $this->instance->select($config['dbindex']); } $this->eventLogger->end('connect:redis'); } } /** * Get the ssl context config * * @param array $config the current config * @return array|null * @throws \UnexpectedValueException */ private function getSslContext($config) { if (isset($config['ssl_context'])) { if (!$this->isConnectionParametersSupported()) { throw new \UnexpectedValueException(\sprintf( 'php-redis extension must be version %s or higher to support ssl context', self::REDIS_EXTRA_PARAMETERS_MINIMAL_VERSION )); } return $config['ssl_context']; } return null; } public function getInstance() { if (!$this->isAvailable()) { throw new \Exception('Redis support is not available'); } if (!$this->instance instanceof \Redis) { $this->create(); } return $this->instance; } public function isAvailable(): bool { return \extension_loaded('redis') && \version_compare(\phpversion('redis'), self::REDIS_MINIMAL_VERSION, '>='); } /** * Php redis does support configurable extra parameters since version 5.3.0, see: https://github.com/phpredis/phpredis#connect-open. * We need to check if the current version supports extra connection parameters, otherwise the connect method will throw an exception * * @return boolean */ private function isConnectionParametersSupported(): bool { return \extension_loaded('redis') && \version_compare(\phpversion('redis'), self::REDIS_EXTRA_PARAMETERS_MINIMAL_VERSION, '>='); } }