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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\CMS\Application;
\defined('JPATH_PLATFORM') or die;
use Joomla\Application\Web\WebClient;
use Joomla\CMS\Access\Exception\AuthenticationFailed;
use Joomla\CMS\Component\ComponentHelper;
use Joomla\CMS\Factory;
use Joomla\CMS\Plugin\PluginHelper;
use Joomla\CMS\Router\ApiRouter;
use Joomla\CMS\Router\Exception\RouteNotFoundException;
use Joomla\CMS\Uri\Uri;
use Joomla\DI\Container;
use Joomla\Input\Json as JInputJson;
use Joomla\Registry\Registry;
use Negotiation\Accept;
use Negotiation\Exception\InvalidArgument;
use Negotiation\Negotiator;
/**
* Joomla! API Application class
*
* @since 4.0.0
*/
final class ApiApplication extends CMSApplication
{
/**
* Maps extension types to their
*
* @var array
* @since 4.0.0
*/
protected $formatMapper = array();
/**
* The authentication plugin type
*
* @var string
* @since 4.0.0
*/
protected $authenticationPluginType = 'api-authentication';
/**
* Class constructor.
*
* @param JInputJson $input An optional argument to provide dependency injection for the application's input
* object. If the argument is a JInput object that object will become the
* application's input object, otherwise a default input object is created.
* @param Registry $config An optional argument to provide dependency injection for the application's config
* object. If the argument is a Registry object that object will become the
* application's config object, otherwise a default config object is created.
* @param WebClient $client An optional argument to provide dependency injection for the application's client
* object. If the argument is a WebClient object that object will become the
* application's client object, otherwise a default client object is created.
* @param Container $container Dependency injection container.
*
* @since 4.0.0
*/
public function __construct(JInputJson $input = null, Registry $config = null, WebClient $client = null, Container $container = null)
{
// Register the application name
$this->name = 'api';
// Register the client ID
$this->clientId = 3;
// Execute the parent constructor
parent::__construct($input, $config, $client, $container);
$this->addFormatMap('application/json', 'json');
$this->addFormatMap('application/vnd.api+json', 'jsonapi');
// Set the root in the URI based on the application name
Uri::root(null, str_ireplace('/' . $this->getName(), '', Uri::base(true)));
}
/**
* Method to run the application routines.
*
* Most likely you will want to instantiate a controller and execute it, or perform some sort of task directly.
*
* @return void
*
* @since 4.0.0
*/
protected function doExecute()
{
// Initialise the application
$this->initialiseApp();
// Mark afterInitialise in the profiler.
JDEBUG ? $this->profiler->mark('afterInitialise') : null;
// Route the application
$this->route();
// Mark afterApiRoute in the profiler.
JDEBUG ? $this->profiler->mark('afterApiRoute') : null;
// Dispatch the application
$this->dispatch();
// Mark afterDispatch in the profiler.
JDEBUG ? $this->profiler->mark('afterDispatch') : null;
}
/**
* Adds a mapping from a content type to the format stored. Note the format type cannot be overwritten.
*
* @param string $contentHeader The content header
* @param string $format The content type format
*
* @return void
*
* @since 4.0.0
*/
public function addFormatMap($contentHeader, $format)
{
if (!\array_key_exists($contentHeader, $this->formatMapper))
{
$this->formatMapper[$contentHeader] = $format;
}
}
/**
* Rendering is the process of pushing the document buffers into the template
* placeholders, retrieving data from the document and pushing it into
* the application response buffer.
*
* @return void
*
* @since 4.0.0
*
* @note Rendering should be overridden to get rid of the theme files.
*/
protected function render()
{
// Render the document
$this->setBody($this->document->render($this->allowCache()));
}
/**
* Method to send the application response to the client. All headers will be sent prior to the main application output data.
*
* @param array $options An optional argument to enable CORS. (Temporary)
*
* @return void
*
* @since 4.0.0
*/
protected function respond($options = array())
{
// Set the Joomla! API signature
$this->setHeader('X-Powered-By', 'JoomlaAPI/1.0', true);
$forceCORS = (int) $this->get('cors');
if ($forceCORS)
{
/**
* Enable CORS (Cross-origin resource sharing)
* Obtain allowed CORS origin from Global Settings.
* Set to * (=all) if not set.
*/
$allowedOrigin = $this->get('cors_allow_origin', '*');
$this->setHeader('Access-Control-Allow-Origin', $allowedOrigin, true);
$this->setHeader('Access-Control-Allow-Headers', 'Authorization');
if ($this->input->server->getString('HTTP_ORIGIN', null) !== null)
{
$this->setHeader('Access-Control-Allow-Origin', $this->input->server->getString('HTTP_ORIGIN'), true);
$this->setHeader('Access-Control-Allow-Credentials', 'true', true);
}
}
// Parent function can be overridden later on for debugging.
parent::respond();
}
/**
* Gets the name of the current template.
*
* @param boolean $params True to return the template parameters
*
* @return string
*
* @since 4.0.0
*/
public function getTemplate($params = false)
{
// The API application should not need to use a template
if ($params)
{
$template = new \stdClass;
$template->template = 'system';
$template->params = new Registry;
$template->inheritable = 0;
$template->parent = '';
return $template;
}
return 'system';
}
/**
* Route the application.
*
* Routing is the process of examining the request environment to determine which
* component should receive the request. The component optional parameters
* are then set in the request object to be processed when the application is being
* dispatched.
*
* @return void
*
* @since 4.0.0
*/
protected function route()
{
$router = $this->getApiRouter();
// Trigger the onBeforeApiRoute event.
PluginHelper::importPlugin('webservices');
$this->triggerEvent('onBeforeApiRoute', array(&$router, $this));
$caught404 = false;
$method = $this->input->getMethod();
try
{
$this->handlePreflight($method, $router);
$route = $router->parseApiRoute($method);
}
catch (RouteNotFoundException $e)
{
$caught404 = true;
}
/**
* Now we have an API perform content negotiation to ensure we have a valid header. Assume if the route doesn't
* tell us otherwise it uses the plain JSON API
*/
$priorities = array('application/vnd.api+json');
if (!$caught404 && \array_key_exists('format', $route['vars']))
{
$priorities = $route['vars']['format'];
}
$negotiator = new Negotiator;
try
{
$mediaType = $negotiator->getBest($this->input->server->getString('HTTP_ACCEPT'), $priorities);
}
catch (InvalidArgument $e)
{
$mediaType = null;
}
// If we can't find a match bail with a 406 - Not Acceptable
if ($mediaType === null)
{
throw new Exception\NotAcceptable('Could not match accept header', 406);
}
/** @var $mediaType Accept */
$format = $mediaType->getValue();
if (\array_key_exists($mediaType->getValue(), $this->formatMapper))
{
$format = $this->formatMapper[$mediaType->getValue()];
}
$this->input->set('format', $format);
if ($caught404)
{
throw $e;
}
$this->input->set('option', $route['vars']['component']);
$this->input->set('controller', $route['controller']);
$this->input->set('task', $route['task']);
foreach ($route['vars'] as $key => $value)
{
if ($key !== 'component')
{
if ($this->input->getMethod() === 'POST')
{
$this->input->post->set($key, $value);
}
else
{
$this->input->set($key, $value);
}
}
}
$this->triggerEvent('onAfterApiRoute', array($this));
if (!isset($route['vars']['public']) || $route['vars']['public'] === false)
{
if (!$this->login(array('username' => ''), array('silent' => true, 'action' => 'core.login.api')))
{
throw new AuthenticationFailed;
}
}
}
/**
* Handles preflight requests.
*
* @param String $method The REST verb
*
* @param ApiRouter $router The API Routing object
*
* @return void
*
* @since 4.0.0
*/
protected function handlePreflight($method, $router)
{
/**
* If not an OPTIONS request or CORS is not enabled,
* there's nothing useful to do here.
*/
if ($method !== 'OPTIONS' || !(int) $this->get('cors'))
{
return;
}
// Extract routes matching current route from all known routes.
$matchingRoutes = $router->getMatchingRoutes();
// Extract exposed methods from matching routes.
$matchingRoutesMethods = array_unique(
array_reduce($matchingRoutes,
function ($carry, $route) {
return array_merge($carry, $route->getMethods());
},
[]
)
);
/**
* Obtain allowed CORS origin from Global Settings.
* Set to * (=all) if not set.
*/
$allowedOrigin = $this->get('cors_allow_origin', '*');
/**
* Obtain allowed CORS headers from Global Settings.
* Set to sensible default if not set.
*/
$allowedHeaders = $this->get('cors_allowed_headers', 'Content-Type,X-Joomla-Token');
/**
* Obtain allowed CORS methods from Global Settings.
* Set to methods exposed by current route if not set.
*/
$allowedMethods = $this->get('cors_allowed_headers', implode(',', $matchingRoutesMethods));
// No use to go through the regular route handling hassle,
// so let's simply output the headers and exit.
$this->setHeader('status', '204');
$this->setHeader('Access-Control-Allow-Origin', $allowedOrigin);
$this->setHeader('Access-Control-Allow-Headers', $allowedHeaders);
$this->setHeader('Access-Control-Allow-Methods', $allowedMethods);
$this->sendHeaders();
$this->close();
}
/**
* Returns the application Router object.
*
* @return ApiRouter
*
* @since 4.0.0
*/
public function getApiRouter()
{
return $this->getContainer()->get('ApiRouter');
}
/**
* Dispatch the application
*
* @param string $component The component which is being rendered.
*
* @return void
*
* @since 4.0.0
*/
public function dispatch($component = null)
{
// Get the component if not set.
if (!$component)
{
$component = $this->input->get('option', null);
}
// Load the document to the API
$this->loadDocument();
// Set up the params
$document = Factory::getDocument();
// Register the document object with Factory
Factory::$document = $document;
$contents = ComponentHelper::renderComponent($component);
$document->setBuffer($contents, 'component');
// Trigger the onAfterDispatch event.
PluginHelper::importPlugin('system');
$this->triggerEvent('onAfterDispatch');
}
}