/**
* This method may transform the supplied source and return a new replacement for it
*
* @param StreamMetaData $metadata Metadata for source
* @return void|bool Return false if transformation should be stopped
*/
public function transform(StreamMetaData $metadata)
{
// Do not create a cache
if (!$this->cachePath) {
return $this->processTransformers($metadata);
}
$originalUri = $metadata->uri;
$wasProcessed = false;
$cacheUri = $this->cacheManager->getCachePathForResource($originalUri);
$lastModified = filemtime($originalUri);
$cacheState = $this->cacheManager->queryCacheState($originalUri);
$cacheModified = $cacheState ? $cacheState['filemtime'] : 0;
if ($cacheModified < $lastModified || !$this->container->isFresh($cacheModified)) {
$wasProcessed = $this->processTransformers($metadata);
if ($wasProcessed) {
$parentCacheDir = dirname($cacheUri);
if (!is_dir($parentCacheDir)) {
mkdir($parentCacheDir, 0770, true);
}
file_put_contents($cacheUri, $metadata->source);
if (!$cacheState && $this->cacheFileMode) {
chmod($cacheUri, $this->cacheFileMode);
}
}
$this->cacheManager->setCacheState($originalUri, array('filemtime' => isset($_SERVER['REQUEST_TIME']) ? $_SERVER['REQUEST_TIME'] : time(), 'cacheUri' => $wasProcessed ? $cacheUri : null));
return $wasProcessed;
}
if ($cacheState) {
$wasProcessed = isset($cacheState['cacheUri']);
}
if ($wasProcessed) {
$metadata->source = file_get_contents($cacheUri);
}
return $wasProcessed;
}
/**
* This method may transform the supplied source and return a new replacement for it
*
* @param StreamMetaData $metadata Metadata for source
* @return bool Return false if transformation should be stopped
*/
public function transform(StreamMetaData $metadata)
{
// Do not create a cache
if (!$this->cacheManager->getCacheDir()) {
return $this->processTransformers($metadata);
}
$originalUri = $metadata->uri;
$wasProcessed = false;
$cacheUri = $this->cacheManager->getCachePathForResource($originalUri);
// Guard to disable overwriting of original files
if ($cacheUri === $originalUri) {
return false;
}
$lastModified = filemtime($originalUri);
$cacheState = $this->cacheManager->queryCacheState($originalUri);
$cacheModified = $cacheState ? $cacheState['filemtime'] : 0;
if ($cacheModified < $lastModified || isset($cacheState['cacheUri']) && $cacheState['cacheUri'] !== $cacheUri || !$this->container->isFresh($cacheModified)) {
$wasProcessed = $this->processTransformers($metadata);
if ($wasProcessed) {
$parentCacheDir = dirname($cacheUri);
if (!is_dir($parentCacheDir)) {
mkdir($parentCacheDir, $this->cacheFileMode, true);
}
file_put_contents($cacheUri, $metadata->source, LOCK_EX);
// For cache files we don't want executable bits by default
chmod($cacheUri, $this->cacheFileMode & ~0111);
}
$this->cacheManager->setCacheState($originalUri, array('filemtime' => isset($_SERVER['REQUEST_TIME']) ? $_SERVER['REQUEST_TIME'] : time(), 'cacheUri' => $wasProcessed ? $cacheUri : null));
return $wasProcessed;
}
if ($cacheState) {
$wasProcessed = isset($cacheState['cacheUri']);
}
if ($wasProcessed) {
$metadata->source = file_get_contents($cacheUri);
}
return $wasProcessed;
}
/**
* Replace source path with correct one
*
* This operation can check for cache, can rewrite paths, add additional filters and much more
*
* @param string $originalResource Initial resource to include
* @param string $originalDir Path to the directory from where include was called for resolving relative resources
*
* @return string Transformed path to the resource
*/
public static function rewrite($originalResource, $originalDir = '')
{
static $appDir, $cacheDir, $debug;
if (!$appDir) {
extract(self::$options, EXTR_IF_EXISTS);
}
$resource = (string) $originalResource;
if ($resource['0'] !== '/') {
$shouldCheckExistence = true;
$resource = PathResolver::realpath($resource, $shouldCheckExistence) ?: PathResolver::realpath("{$originalDir}/{$resource}", $shouldCheckExistence) ?: $originalResource;
}
$cachedResource = self::$cachePathManager->getCachePathForResource($resource);
// If the cache is disabled or no cache yet, then use on-fly method
if (!$cacheDir || $debug || !file_exists($cachedResource)) {
return self::PHP_FILTER_READ . self::$filterName . "/resource=" . $resource;
}
return $cachedResource;
}
