f1ecc27029
Write heavy operations like sessions fare much better in Redis or (sic) Memcache[d] so I've dropped support for MySQL sessions entirely.
129 lines
3.7 KiB
PHP
129 lines
3.7 KiB
PHP
<?php
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/**
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* Session Handling for PICKLES
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*
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* PHP version 5
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*
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* Licensed under The MIT License
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* Redistribution of these files must retain the above copyright notice.
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*
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* @author Joshua Sherman <pickles@joshtronic.com>
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* @copyright Copyright 2007-2014, Joshua Sherman
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* @license http://www.opensource.org/licenses/mit-license.html
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* @package PICKLES
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* @link https://github.com/joshtronic/pickles
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*/
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/**
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* Session Class
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*
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* Provides session handling via database instead of the file based session
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* handling built into PHP. Using this class requires an array to be
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* defined in place of the boolean true/false (on/off). If simply array(),
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* the datasource will default to the value in
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* $config['pickles']['datasource'] and if the table will default to
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* "sessions". The format is as follows:
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*/
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class Session extends Object
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{
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/**
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* Constructor
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*
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* All of our set up logic for the session in contained here. This class is
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* initially instantiated from pickles.php. Non-file handlers need to be
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* configured in the site's config. MySQL support was dropped in favor of
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* in memory stores or simply relying on file based sessions. Why? Because
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* using MySQL for sessions is very write intensive and having done it in
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* the past I don't recommend it. If you run a single server, files are
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* good enough if your volume is lower. Memcache[d] is fine if you don't
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* mind logging all of your users off your site when you restart the
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* service and/or you run out of memory for the process. Redis is the best
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* choice as it can be configured to be persistent and lives in memory.
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* This is assuming you don't just want to roll your own sessions, which is
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* pretty damn easy as well.
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*/
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public function __construct()
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{
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if (!IS_CLI)
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{
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parent::__construct();
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// Sets up our configuration variables
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if (isset($this->config->pickles['sessions']))
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{
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$session = $this->config->pickles['sessions'];
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}
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$datasources = $this->config->datasources;
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$handler = 'files';
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$datasource = false;
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if (isset($datasources[$session]))
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{
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$datasource = $datasources[$session];
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$handler = $datasource['type'];
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if ($handler != 'files')
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{
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if (isset($datasource['hostname'], $datasource['port']))
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{
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$host = ($handler != 'memcached' ? 'tcp://' : '')
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. $datasource['hostname'] . ':' . $datasource['port'];
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}
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else
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{
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throw new Exception('You must provide both the hostname and port for the datasource.');
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}
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}
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}
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switch ($handler)
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{
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case 'memcache':
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ini_set('session.save_handler', 'memcache');
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ini_set('session.save_path', $host . '?persistent=1&weight=1&timeout=1&retry_interval=15');
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break;
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case 'memcached':
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ini_set('session.save_handler', 'memcached');
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ini_set('session.save_path', $host);
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break;
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case 'redis':
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$save_path = $host . '?weight=1';
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// Database ignored by phpredis when this was coded
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if (isset($datasource['database']))
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{
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$save_path .= '&database=' . $datasource['database'];
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}
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if (isset($datasource['prefix']))
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{
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$save_path .= '&prefix=' . $datasource['prefix'];
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}
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ini_set('session.save_handler', 'redis');
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ini_set('session.save_path', $save_path);
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break;
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default:
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case 'files':
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ini_set('session.save_handler', 'files');
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break;
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}
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// Don't start sessions for people without a user agent and bots.
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if (isset($_SERVER['HTTP_USER_AGENT'])
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&& !String::isEmpty($_SERVER['HTTP_USER_AGENT'])
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&& !preg_match('/(Baidu|Gigabot|Googlebot|libwww-perl|lwp-trivial|msnbot|SiteUptime|Slurp|WordPress|ZIBB|ZyBorg)/i', $_SERVER['HTTP_USER_AGENT']))
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{
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session_start();
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}
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}
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}
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}
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?>
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