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* Lithium: the most rad php framework
* @copyright Copyright 2010, Union of RAD (
* @license The BSD License
* The `Collection` class, which serves as the base class for some of Lithium's data objects
* (`RecordSet` and `Document`) provides a way to manage data collections in a very flexible and
* intuitive way, using closures and SPL interfaces. The `to()` method allows a `Collection` (or
* subclass) to be converted to another format, such as an array. The `Collection` class also allows
* other classes to be connected as handlers to convert `Collection` objects to other formats.
* The following connects the `Media` class as a format handler, which allows `Collection`s to be
* exported to any format with a handler provided by `Media`, i.e. JSON. This enables things like
* the following:
* {{{
* $posts = Post::find('all');
* return $posts->to('json');
* }}}
use lithium\util\Collection;
* This filter is a convenience method which allows you to automatically route requests for static
* assets stored within active plugins. For example, given a JavaScript file `bar.js` inside the
* `li3_foo` plugin installed in an application, requests to `http://app/path/li3_foo/js/bar.js`
* will be routed to `/path/to/app/libraries/plugins/li3_foo/webroot/js/bar.js` on the filesystem.
* In production, it is recommended that you disable this filter in favor of symlinking each
* plugin's `webroot` directory into your main application's `webroot` directory, or adding routing
* rules in your web server's configuration.
use lithium\action\Dispatcher;
use lithium\core\Libraries;
use lithium\net\http\Media;
Dispatcher::applyFilter('_callable', function($self, $params, $chain) {
list($plugin, $asset) = explode('/', $params['request']->url, 2) + array("", "");
if ($asset && $library = Libraries::get($plugin)) {
$asset = "{$library['path']}/webroot/{$asset}";
if (file_exists($asset)) {
return function () use ($asset) {
$info = pathinfo($asset);
$type = Media::type($info['extension']);
header("Content-type: {$type['content']}");
return file_get_contents($asset);
return $chain->next($self, $params, $chain);
Media::type('jpg', 'image/jpeg', array('cast' => false, 'encode' => function($data) {
return $data['photo']->file->getBytes();