diff options
Diffstat (limited to 'system/database/DB_cache.php')
-rw-r--r-- | system/database/DB_cache.php | 388 |
1 files changed, 194 insertions, 194 deletions
diff --git a/system/database/DB_cache.php b/system/database/DB_cache.php index 9bb1b165b..70a2d95e3 100644 --- a/system/database/DB_cache.php +++ b/system/database/DB_cache.php @@ -1,195 +1,195 @@ -<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 4.3.2 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
-
-// ------------------------------------------------------------------------
-
-/**
- * Database Cache Class
- *
- * @category Database
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/database/
- */
-class CI_DB_Cache {
-
- var $CI;
- var $db; // allows passing of db object so that multiple database connections and returned db objects can be supported
-
- /**
- * Constructor
- *
- * Grabs the CI super object instance so we can access it.
- *
- */
- function CI_DB_Cache(&$db)
- {
- // Assign the main CI object to $this->CI
- // and load the file helper since we use it a lot
- $this->CI =& get_instance();
- $this->db =& $db;
- $this->CI->load->helper('file');
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set Cache Directory Path
- *
- * @access public
- * @param string the path to the cache directory
- * @return bool
- */
- function check_path($path = '')
- {
- if ($path == '')
- {
- if ($this->db->cachedir == '')
- {
- return $this->db->cache_off();
- }
-
- $path = $this->db->cachedir;
- }
-
- // Add a trailing slash to the path if needed
- $path = preg_replace("/(.+?)\/*$/", "\\1/", $path);
-
- if ( ! is_dir($path) OR ! is_really_writable($path))
- {
- // If the path is wrong we'll turn off caching
- return $this->db->cache_off();
- }
-
- $this->db->cachedir = $path;
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Retrieve a cached query
- *
- * The URI being requested will become the name of the cache sub-folder.
- * An MD5 hash of the SQL statement will become the cache file name
- *
- * @access public
- * @return string
- */
- function read($sql)
- {
- if ( ! $this->check_path())
- {
- return $this->db->cache_off();
- }
-
- $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1);
-
- $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
-
- $filepath = $this->db->cachedir.$segment_one.'+'.$segment_two.'/'.md5($sql);
-
- if (FALSE === ($cachedata = read_file($filepath)))
- {
- return FALSE;
- }
-
- return unserialize($cachedata);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Write a query to a cache file
- *
- * @access public
- * @return bool
- */
- function write($sql, $object)
- {
- if ( ! $this->check_path())
- {
- return $this->db->cache_off();
- }
-
- $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1);
-
- $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
-
- $dir_path = $this->db->cachedir.$segment_one.'+'.$segment_two.'/';
-
- $filename = md5($sql);
-
- if ( ! @is_dir($dir_path))
- {
- if ( ! @mkdir($dir_path, DIR_WRITE_MODE))
- {
- return FALSE;
- }
-
- @chmod($dir_path, DIR_WRITE_MODE);
- }
-
- if (write_file($dir_path.$filename, serialize($object)) === FALSE)
- {
- return FALSE;
- }
-
- @chmod($dir_path.$filename, DIR_WRITE_MODE);
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete cache files within a particular directory
- *
- * @access public
- * @return bool
- */
- function delete($segment_one = '', $segment_two = '')
- {
- if ($segment_one == '')
- {
- $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1);
- }
-
- if ($segment_two == '')
- {
- $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2);
- }
-
- $dir_path = $this->db->cachedir.$segment_one.'+'.$segment_two.'/';
-
- delete_files($dir_path, TRUE);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete all existing cache files
- *
- * @access public
- * @return bool
- */
- function delete_all()
- {
- delete_files($this->db->cachedir, TRUE);
- }
-
-}
-
-
-/* End of file DB_cache.php */
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +/** + * CodeIgniter + * + * An open source application development framework for PHP 4.3.2 or newer + * + * @package CodeIgniter + * @author ExpressionEngine Dev Team + * @copyright Copyright (c) 2008, EllisLab, Inc. + * @license http://codeigniter.com/user_guide/license.html + * @link http://codeigniter.com + * @since Version 1.0 + * @filesource + */ + +// ------------------------------------------------------------------------ + +/** + * Database Cache Class + * + * @category Database + * @author ExpressionEngine Dev Team + * @link http://codeigniter.com/user_guide/database/ + */ +class CI_DB_Cache { + + var $CI; + var $db; // allows passing of db object so that multiple database connections and returned db objects can be supported + + /** + * Constructor + * + * Grabs the CI super object instance so we can access it. + * + */ + function CI_DB_Cache(&$db) + { + // Assign the main CI object to $this->CI + // and load the file helper since we use it a lot + $this->CI =& get_instance(); + $this->db =& $db; + $this->CI->load->helper('file'); + } + + // -------------------------------------------------------------------- + + /** + * Set Cache Directory Path + * + * @access public + * @param string the path to the cache directory + * @return bool + */ + function check_path($path = '') + { + if ($path == '') + { + if ($this->db->cachedir == '') + { + return $this->db->cache_off(); + } + + $path = $this->db->cachedir; + } + + // Add a trailing slash to the path if needed + $path = preg_replace("/(.+?)\/*$/", "\\1/", $path); + + if ( ! is_dir($path) OR ! is_really_writable($path)) + { + // If the path is wrong we'll turn off caching + return $this->db->cache_off(); + } + + $this->db->cachedir = $path; + return TRUE; + } + + // -------------------------------------------------------------------- + + /** + * Retrieve a cached query + * + * The URI being requested will become the name of the cache sub-folder. + * An MD5 hash of the SQL statement will become the cache file name + * + * @access public + * @return string + */ + function read($sql) + { + if ( ! $this->check_path()) + { + return $this->db->cache_off(); + } + + $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1); + + $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2); + + $filepath = $this->db->cachedir.$segment_one.'+'.$segment_two.'/'.md5($sql); + + if (FALSE === ($cachedata = read_file($filepath))) + { + return FALSE; + } + + return unserialize($cachedata); + } + + // -------------------------------------------------------------------- + + /** + * Write a query to a cache file + * + * @access public + * @return bool + */ + function write($sql, $object) + { + if ( ! $this->check_path()) + { + return $this->db->cache_off(); + } + + $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1); + + $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2); + + $dir_path = $this->db->cachedir.$segment_one.'+'.$segment_two.'/'; + + $filename = md5($sql); + + if ( ! @is_dir($dir_path)) + { + if ( ! @mkdir($dir_path, DIR_WRITE_MODE)) + { + return FALSE; + } + + @chmod($dir_path, DIR_WRITE_MODE); + } + + if (write_file($dir_path.$filename, serialize($object)) === FALSE) + { + return FALSE; + } + + @chmod($dir_path.$filename, DIR_WRITE_MODE); + return TRUE; + } + + // -------------------------------------------------------------------- + + /** + * Delete cache files within a particular directory + * + * @access public + * @return bool + */ + function delete($segment_one = '', $segment_two = '') + { + if ($segment_one == '') + { + $segment_one = ($this->CI->uri->segment(1) == FALSE) ? 'default' : $this->CI->uri->segment(1); + } + + if ($segment_two == '') + { + $segment_two = ($this->CI->uri->segment(2) == FALSE) ? 'index' : $this->CI->uri->segment(2); + } + + $dir_path = $this->db->cachedir.$segment_one.'+'.$segment_two.'/'; + + delete_files($dir_path, TRUE); + } + + // -------------------------------------------------------------------- + + /** + * Delete all existing cache files + * + * @access public + * @return bool + */ + function delete_all() + { + delete_files($this->db->cachedir, TRUE); + } + +} + + +/* End of file DB_cache.php */ /* Location: ./system/database/DB_cache.php */
\ No newline at end of file |