62 lines
1.8 KiB
PHP
62 lines
1.8 KiB
PHP
<?php
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class RippingCluster_Cache {
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protected $config;
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protected $cache_dir;
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public function __construct(RippingCluster_Config $config) {
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$this->config = $config;
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$this->cache_dir = $config->get('cache.base_dir');
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if (is_dir($this->cache_dir)) {
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if ( ! is_writeable($this->cache_dir)) {
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throw new RippingCluster_Exception_InvalidCacheDir();
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}
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} else {
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if ( ! RippingCluster_Main::mkdir_recursive($this->cache_dir)) {
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throw new RippingCluster_Exception_InvalidCacheDir();
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}
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}
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}
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protected function cacheFilename($source_filename) {
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return $this->cache_dir . sha1($source_filename);
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}
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public function exists($source_filename, $ttl = 3600) {
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$cache_filename = $this->cacheFilename($source_filename);
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// Check to see if the file is cached
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if (!file_exists($cache_filename)) {
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return false;
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}
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// Check to see if the cache has expired
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if (filemtime($cache_filename) + $ttl < time()) {
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// Delete the cached item
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unlink($cache_filename);
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return false;
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}
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return true;
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}
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public function store($source_filename, $content) {
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$cache_filename = $this->cacheFilename($source_filename);
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return file_put_contents($cache_filename, $content);
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}
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public function fetch($source_filename, $ttl = 3600) {
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$cache_filename = $this->cacheFilename($source_filename);
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if (!$this->exists($source_filename)) {
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throw new RippingCluster_Exception_CacheObjectNotFound($source_filename);
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}
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return file_get_contents($cache_filename);
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}
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};
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?>
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