41a09896c1
* Use default .cache extension for ResourceFileCache. No need for js/css extension, and makes extension sanity check in prune script simpler. * Removed redundant setting of mExt in ObjectFileCache
87 lines
2.4 KiB
PHP
87 lines
2.4 KiB
PHP
<?php
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/**
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* Contain the ResourceFileCache class
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* @file
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* @ingroup Cache
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*/
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class ResourceFileCache extends FileCacheBase {
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protected $mCacheWorthy;
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/* @TODO: configurable? */
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const MISS_THRESHOLD = 360; // 6/min * 60 min
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/**
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* Construct an ResourceFileCache from a context
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* @param $context ResourceLoaderContext
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* @return ResourceFileCache
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*/
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public static function newFromContext( ResourceLoaderContext $context ) {
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$cache = new self();
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if ( $context->getOnly() === 'styles' ) {
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$cache->mType = 'css';
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} else {
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$cache->mType = 'js';
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}
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$modules = array_unique( $context->getModules() ); // remove duplicates
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sort( $modules ); // normalize the order (permutation => combination)
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$cache->mKey = sha1( $context->getHash() . implode( '|', $modules ) );
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if ( count( $modules ) == 1 ) {
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$cache->mCacheWorthy = true; // won't take up much space
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}
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return $cache;
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}
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/**
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* Check if an RL request can be cached.
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* Caller is responsible for checking if any modules are private.
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* @param $context ResourceLoaderContext
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* @return bool
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*/
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public static function useFileCache( ResourceLoaderContext $context ) {
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global $wgUseFileCache, $wgDefaultSkin, $wgLanguageCode;
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if ( !$wgUseFileCache ) {
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return false;
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}
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// Get all query values
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$queryVals = $context->getRequest()->getValues();
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foreach ( $queryVals as $query => $val ) {
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if ( $query === 'modules' || $query === 'version' || $query === '*' ) {
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continue; // note: &* added as IE fix
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} elseif ( $query === 'skin' && $val === $wgDefaultSkin ) {
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continue;
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} elseif ( $query === 'lang' && $val === $wgLanguageCode ) {
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continue;
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} elseif ( $query === 'only' && in_array( $val, array( 'styles', 'scripts' ) ) ) {
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continue;
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} elseif ( $query === 'debug' && $val === 'false' ) {
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continue;
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}
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return false;
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}
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return true; // cacheable
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}
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/**
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* Get the base file cache directory
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* @return string
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*/
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protected function cacheDirectory() {
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return $this->baseCacheDirectory() . '/resources';
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}
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/**
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* Item has many recent cache misses
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* @return bool
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*/
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public function isCacheWorthy() {
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if ( $this->mCacheWorthy === null ) {
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$this->mCacheWorthy = (
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$this->isCached() || // even stale cache indicates it was cache worthy
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$this->getMissesRecent() >= self::MISS_THRESHOLD // many misses
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);
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}
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return $this->mCacheWorthy;
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}
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}
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