diff options
| author | ewinslow <ewinslow@36083f99-b078-4883-b0ff-0f9b5a30f544> | 2010-09-06 02:42:09 +0000 |
|---|---|---|
| committer | ewinslow <ewinslow@36083f99-b078-4883-b0ff-0f9b5a30f544> | 2010-09-06 02:42:09 +0000 |
| commit | 76dac45ebaf104b312a8527a05424601ca9d520a (patch) | |
| tree | 7440558a893ebf1d3816829ecbb96c3b0df9b4f0 /engine/classes/ElggFileCache.php | |
| parent | 9e8baf614938dfd1687ddce39b409c3c0e5c5753 (diff) | |
| download | elgg-76dac45ebaf104b312a8527a05424601ca9d520a.tar.gz elgg-76dac45ebaf104b312a8527a05424601ca9d520a.tar.bz2 | |
Refs #2220: Pulled most classes / interfaces out of lib files (except query.php and exception.php) into "classes" folder. Replaced inline classes with "require_once" statements for now. Ran unit tests to verify functionality before committing.
git-svn-id: http://code.elgg.org/elgg/trunk@6908 36083f99-b078-4883-b0ff-0f9b5a30f544
Diffstat (limited to 'engine/classes/ElggFileCache.php')
| -rw-r--r-- | engine/classes/ElggFileCache.php | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/engine/classes/ElggFileCache.php b/engine/classes/ElggFileCache.php new file mode 100644 index 000000000..b8989a935 --- /dev/null +++ b/engine/classes/ElggFileCache.php @@ -0,0 +1,164 @@ +<?php
+/**
+ * ElggFileCache
+ * Store cached data in a file store.
+ *
+ * @author Curverider Ltd <info@elgg.com>
+ * @package Elgg
+ * @subpackage API
+ */
+class ElggFileCache extends ElggCache {
+ /**
+ * Set the Elgg cache.
+ *
+ * @param string $cache_path The cache path.
+ * @param int $max_age Maximum age in seconds, 0 if no limit.
+ * @param int $max_size Maximum size of cache in seconds, 0 if no limit.
+ */
+ function __construct($cache_path, $max_age = 0, $max_size = 0) {
+ $this->set_variable("cache_path", $cache_path);
+ $this->set_variable("max_age", $max_age);
+ $this->set_variable("max_size", $max_size);
+
+ if ($cache_path=="") {
+ throw new ConfigurationException(elgg_echo('ConfigurationException:NoCachePath'));
+ }
+ }
+
+ /**
+ * Create and return a handle to a file.
+ *
+ * @param string $filename
+ * @param string $rw
+ */
+ protected function create_file($filename, $rw = "rb") {
+ // Create a filename matrix
+ $matrix = "";
+ $depth = strlen($filename);
+ if ($depth > 5) {
+ $depth = 5;
+ }
+
+ // Create full path
+ $path = $this->get_variable("cache_path") . $matrix;
+ if (!is_dir($path)) {
+ mkdir($path, 0700, true);
+ }
+
+ // Open the file
+ if ((!file_exists($path . $filename)) && ($rw=="rb")) {
+ return false;
+ }
+
+ return fopen($path . $filename, $rw);
+ }
+
+ /**
+ * Create a sanitised filename for the file.
+ *
+ * @param string $filename
+ */
+ protected function sanitise_filename($filename) {
+ // @todo : Writeme
+
+ return $filename;
+ }
+
+ /**
+ * Save a key
+ *
+ * @param string $key
+ * @param string $data
+ * @return boolean
+ */
+ public function save($key, $data) {
+ $f = $this->create_file($this->sanitise_filename($key), "wb");
+ if ($f) {
+ $result = fwrite($f, $data);
+ fclose($f);
+
+ return $result;
+ }
+
+ return false;
+ }
+
+ /**
+ * Load a key
+ *
+ * @param string $key
+ * @param int $offset
+ * @param int $limit
+ * @return string
+ */
+ public function load($key, $offset = 0, $limit = null) {
+ $f = $this->create_file($this->sanitise_filename($key));
+ if ($f) {
+ //fseek($f, $offset);
+ if (!$limit) {
+ $limit = -1;
+ }
+ $data = stream_get_contents($f, $limit, $offset);
+
+ fclose($f);
+
+ return $data;
+ }
+
+ return false;
+ }
+
+ /**
+ * Invalidate a given key.
+ *
+ * @param string $key
+ * @return bool
+ */
+ public function delete($key) {
+ $dir = $this->get_variable("cache_path");
+
+ if (file_exists($dir.$key)) {
+ return unlink($dir.$key);
+ }
+ return TRUE;
+ }
+
+ public function clear() {
+ // @todo writeme
+ }
+
+ public function __destruct() {
+ // @todo Check size and age, clean up accordingly
+ $size = 0;
+ $dir = $this->get_variable("cache_path");
+
+ // Short circuit if both size and age are unlimited
+ if (($this->get_variable("max_age")==0) && ($this->get_variable("max_size")==0)) {
+ return;
+ }
+
+ $exclude = array(".","..");
+
+ $files = scandir($dir);
+ if (!$files) {
+ throw new IOException(sprintf(elgg_echo('IOException:NotDirectory'), $dir));
+ }
+
+ // Perform cleanup
+ foreach ($files as $f) {
+ if (!in_array($f, $exclude)) {
+ $stat = stat($dir.$f);
+
+ // Add size
+ $size .= $stat['size'];
+
+ // Is this older than my maximum date?
+ if (($this->get_variable("max_age")>0) && (time() - $stat['mtime'] > $this->get_variable("max_age"))) {
+ unlink($dir.$f);
+ }
+
+ // @todo Size
+ }
+ }
+ }
+}
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