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-rw-r--r--system/database/DB_cache.php72
1 files changed, 52 insertions, 20 deletions
diff --git a/system/database/DB_cache.php b/system/database/DB_cache.php
index ba9110382..fd01dc2d8 100644
--- a/system/database/DB_cache.php
+++ b/system/database/DB_cache.php
@@ -1,4 +1,4 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
@@ -24,6 +24,7 @@
* @since Version 1.0
* @filesource
*/
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Database Cache Class
@@ -34,15 +35,39 @@
*/
class CI_DB_Cache {
+ /**
+ * CI Singleton
+ *
+ * @var object
+ */
public $CI;
- public $db; // allows passing of db object so that multiple database connections and returned db objects can be supported
+ /**
+ * Database object
+ *
+ * Allows passing of DB object so that multiple database connections
+ * and returned DB objects can be supported.
+ *
+ * @var object
+ */
+ public $db;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Constructor
+ *
+ * @param object &$db
+ * @return void
+ */
public function __construct(&$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');
+
+ $this->check_path();
}
// --------------------------------------------------------------------
@@ -50,7 +75,7 @@ class CI_DB_Cache {
/**
* Set Cache Directory Path
*
- * @param string the path to the cache directory
+ * @param string $path Path to the cache directory
* @return bool
*/
public function check_path($path = '')
@@ -66,14 +91,26 @@ class CI_DB_Cache {
}
// Add a trailing slash to the path if needed
- $path = preg_replace('/(.+?)\/*$/', '\\1/', $path);
+ $path = realpath($path)
+ ? rtrim(realpath($path), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR
+ : rtrim($path, '/').'/';
- if ( ! is_dir($path) OR ! is_really_writable($path))
+ if ( ! is_dir($path))
{
+ log_message('debug', 'DB cache path error: '.$path);
+
// If the path is wrong we'll turn off caching
return $this->db->cache_off();
}
+ if ( ! is_really_writable($path))
+ {
+ log_message('debug', 'DB cache dir not writable: '.$path);
+
+ // If the path is not really writable we'll turn off caching
+ return $this->db->cache_off();
+ }
+
$this->db->cachedir = $path;
return TRUE;
}
@@ -84,22 +121,18 @@ class CI_DB_Cache {
* 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
+ * An MD5 hash of the SQL statement will become the cache file name.
*
+ * @param string $sql
* @return string
*/
public function read($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 === ($cachedata = file_get_contents($filepath)))
+ if (FALSE === ($cachedata = @file_get_contents($filepath)))
{
return FALSE;
}
@@ -112,15 +145,12 @@ class CI_DB_Cache {
/**
* Write a query to a cache file
*
+ * @param string $sql
+ * @param object $object
* @return bool
*/
public function write($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.'/';
@@ -150,7 +180,9 @@ class CI_DB_Cache {
/**
* Delete cache files within a particular directory
*
- * @return bool
+ * @param string $segment_one
+ * @param string $segment_two
+ * @return void
*/
public function delete($segment_one = '', $segment_two = '')
{
@@ -173,11 +205,11 @@ class CI_DB_Cache {
/**
* Delete all existing cache files
*
- * @return bool
+ * @return void
*/
public function delete_all()
{
- delete_files($this->db->cachedir, TRUE, 0, TRUE);
+ delete_files($this->db->cachedir, TRUE, TRUE);
}
}