This class can make AssetCollections and FilterCollections based
on the configuration object passed to it.
/**
* Checks if request is for a compiled asset, otherwise skip any operation
*
* @param Event $event containing the request and response object
* @throws \Cake\Network\Exception\NotFoundException
* @return \Cake\Network\Response|null Response if the client is requesting a recognized asset, null otherwise
*/
public function beforeDispatch(Event $event)
{
$request = $event->data['request'];
$response = $event->data['response'];
$config = $this->_getConfig();
$production = !Configure::read('debug');
if ($production && !$config->general('alwaysEnableController')) {
return null;
}
// Make sure the request looks like an asset.
$targetName = $this->getName($config, $request->url);
if (!$targetName) {
return null;
}
if (isset($request->query['theme'])) {
$config->theme($request->query['theme']);
}
$factory = new Factory($config);
$assets = $factory->assetCollection();
if (!$assets->contains($targetName)) {
return null;
}
$build = $assets->get($targetName);
try {
$compiler = $factory->cachedCompiler();
$contents = $compiler->generate($build);
} catch (Exception $e) {
throw new NotFoundException($e->getMessage());
}
$response->type($build->ext());
$response->body($contents);
$event->stopPropagation();
return $response;
}
/**
* Get an asset or delegate to the next middleware
*
* @param \Psr\Http\Message\ServerRequestInterface $request The request.
* @param \Psr\Http\Message\ResponseInterface $response The response.
* @param callable $next Callback to invoke the next middleware.
* @return \Psr\Http\Message\ResponseInterface A response
*/
public function __invoke($request, $response, $next)
{
$config = $this->config;
$production = !Configure::read('debug');
if ($production && !$config->general('alwaysEnableController')) {
return $next($request, $response);
}
// Make sure the request looks like an asset.
$targetName = $this->getName($config, $request->getUri()->getPath());
if (!$targetName) {
return $next($request, $response);
}
$queryParams = $request->getQueryParams();
if (isset($queryParams['theme'])) {
$config->theme($queryParams['theme']);
}
$factory = new Factory($config);
$assets = $factory->assetCollection();
if (!$assets->contains($targetName)) {
return $next($request, $response);
}
$build = $assets->get($targetName);
try {
$compiler = $factory->cachedCompiler();
$contents = $compiler->generate($build);
} catch (Exception $e) {
throw new NotFoundException($e->getMessage());
}
return $this->respond($response, $contents, $build);
}
/**
* clear the builds for a specific extension.
*
* @return void
*/
protected function _clearBuilds()
{
$themes = (array) $this->config->general('themes');
if ($themes) {
$this->config->theme($themes[0]);
}
$assets = $this->factory->assetCollection();
if (count($assets) === 0) {
$this->err('No build targets defined, skipping');
return;
}
$targets = array_map(function ($target) {
return $target->name();
}, iterator_to_array($assets));
$this->_clearPath(CACHE . 'asset_compress' . DS, $themes, $targets);
$this->_clearPath($this->config->cachePath('js'), $themes, $targets);
$this->_clearPath($this->config->cachePath('css'), $themes, $targets);
}