419 lines
13 KiB
PHP
419 lines
13 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\App;
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use Dice\Dice;
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use FastRoute\DataGenerator\GroupCountBased;
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use FastRoute\Dispatcher;
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use FastRoute\RouteCollector;
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use FastRoute\RouteParser\Std;
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use Friendica\Capabilities\ICanHandleRequests;
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use Friendica\Core\Addon;
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use Friendica\Core\Cache\Enum\Duration;
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use Friendica\Core\Cache\Capability\ICanCache;
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use Friendica\Core\Config\Capability\IManageConfigValues;
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use Friendica\Core\Hook;
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use Friendica\Core\L10n;
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use Friendica\Core\Lock\Capability\ICanLock;
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use Friendica\LegacyModule;
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use Friendica\Module\HTTPException\MethodNotAllowed;
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use Friendica\Module\HTTPException\PageNotFound;
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use Friendica\Network\HTTPException;
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use Friendica\Network\HTTPException\MethodNotAllowedException;
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use Friendica\Network\HTTPException\NoContentException;
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use Friendica\Network\HTTPException\NotFoundException;
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use Psr\Log\LoggerInterface;
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/**
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* Wrapper for FastRoute\Router
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*
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* This wrapper only makes use of a subset of the router features, mainly parses a route rule to return the relevant
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* module class.
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*
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* Actual routes are defined in App->collectRoutes.
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*
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* @package Friendica\App
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*/
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class Router
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{
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const DELETE = 'DELETE';
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const GET = 'GET';
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const PATCH = 'PATCH';
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const POST = 'POST';
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const PUT = 'PUT';
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const OPTIONS = 'OPTIONS';
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const ALLOWED_METHODS = [
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self::DELETE,
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self::GET,
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self::PATCH,
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self::POST,
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self::PUT,
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self::OPTIONS
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];
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/** @var RouteCollector */
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protected $routeCollector;
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/**
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* @var string The HTTP method
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*/
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private $httpMethod;
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/**
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* @var array Module parameters
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*/
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private $parameters = [];
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/** @var L10n */
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private $l10n;
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/** @var ICanCache */
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private $cache;
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/** @var ICanLock */
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private $lock;
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/** @var Arguments */
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private $args;
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/** @var IManageConfigValues */
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private $config;
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/** @var LoggerInterface */
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private $logger;
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/** @var float */
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private $dice_profiler_threshold;
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/** @var Dice */
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private $dice;
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/** @var string */
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private $baseRoutesFilepath;
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/** @var array */
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private $server;
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/**
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* @param array $server The $_SERVER variable
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* @param string $baseRoutesFilepath The path to a base routes file to leverage cache, can be empty
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* @param L10n $l10n
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* @param ICanCache $cache
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* @param ICanLock $lock
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* @param IManageConfigValues $config
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* @param Arguments $args
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* @param LoggerInterface $logger
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* @param Dice $dice
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* @param RouteCollector|null $routeCollector
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*/
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public function __construct(array $server, string $baseRoutesFilepath, L10n $l10n, ICanCache $cache, ICanLock $lock, IManageConfigValues $config, Arguments $args, LoggerInterface $logger, Dice $dice, RouteCollector $routeCollector = null)
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{
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$this->baseRoutesFilepath = $baseRoutesFilepath;
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$this->l10n = $l10n;
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$this->cache = $cache;
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$this->lock = $lock;
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$this->args = $args;
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$this->config = $config;
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$this->dice = $dice;
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$this->server = $server;
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$this->logger = $logger;
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$this->dice_profiler_threshold = $config->get('system', 'dice_profiler_threshold', 0);
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$httpMethod = $this->server['REQUEST_METHOD'] ?? self::GET;
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// @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/OPTIONS
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// @todo Check allowed methods per requested path
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if ($httpMethod === static::OPTIONS) {
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header('Allow: ' . implode(',', Router::ALLOWED_METHODS));
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throw new NoContentException();
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}
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$this->httpMethod = in_array($httpMethod, self::ALLOWED_METHODS) ? $httpMethod : self::GET;
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$this->routeCollector = isset($routeCollector) ?
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$routeCollector :
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new RouteCollector(new Std(), new GroupCountBased());
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if ($this->baseRoutesFilepath && !file_exists($this->baseRoutesFilepath)) {
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throw new HTTPException\InternalServerErrorException('Routes file path does\'n exist.');
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}
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}
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/**
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* This will be called either automatically if a base routes file path was submitted,
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* or can be called manually with a custom route array.
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*
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* @param array $routes The routes to add to the Router
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*
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* @return self The router instance with the loaded routes
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*
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* @throws HTTPException\InternalServerErrorException In case of invalid configs
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*/
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public function loadRoutes(array $routes)
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{
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$routeCollector = (isset($this->routeCollector) ?
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$this->routeCollector :
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new RouteCollector(new Std(), new GroupCountBased()));
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$this->addRoutes($routeCollector, $routes);
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$this->routeCollector = $routeCollector;
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// Add routes from addons
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Hook::callAll('route_collection', $this->routeCollector);
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return $this;
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}
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private function addRoutes(RouteCollector $routeCollector, array $routes)
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{
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foreach ($routes as $route => $config) {
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if ($this->isGroup($config)) {
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$this->addGroup($route, $config, $routeCollector);
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} elseif ($this->isRoute($config)) {
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$routeCollector->addRoute($config[1], $route, $config[0]);
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} else {
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throw new HTTPException\InternalServerErrorException("Wrong route config for route '" . print_r($route, true) . "'");
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}
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}
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}
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/**
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* Adds a group of routes to a given group
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*
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* @param string $groupRoute The route of the group
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* @param array $routes The routes of the group
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* @param RouteCollector $routeCollector The route collector to add this group
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*/
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private function addGroup(string $groupRoute, array $routes, RouteCollector $routeCollector)
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{
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$routeCollector->addGroup($groupRoute, function (RouteCollector $routeCollector) use ($routes) {
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$this->addRoutes($routeCollector, $routes);
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});
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}
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/**
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* Returns true in case the config is a group config
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*
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* @param array $config
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*
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* @return bool
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*/
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private function isGroup(array $config)
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{
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return
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is_array($config) &&
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is_string(array_keys($config)[0]) &&
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// This entry should NOT be a BaseModule
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(substr(array_keys($config)[0], 0, strlen('Friendica\Module')) !== 'Friendica\Module') &&
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// The second argument is an array (another routes)
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is_array(array_values($config)[0]);
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}
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/**
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* Returns true in case the config is a route config
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*
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* @param array $config
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*
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* @return bool
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*/
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private function isRoute(array $config)
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{
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return
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// The config array should at least have one entry
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!empty($config[0]) &&
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// This entry should be a BaseModule
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(substr($config[0], 0, strlen('Friendica\Module')) === 'Friendica\Module') &&
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// Either there is no other argument
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(empty($config[1]) ||
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// Or the second argument is an array (HTTP-Methods)
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is_array($config[1]));
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}
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/**
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* The current route collector
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*
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* @return RouteCollector|null
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*/
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public function getRouteCollector()
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{
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return $this->routeCollector;
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}
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/**
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* Returns the relevant module class name for the given page URI or NULL if no route rule matched.
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*
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* @return string A Friendica\BaseModule-extending class name if a route rule matched
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*
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* @throws HTTPException\InternalServerErrorException
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* @throws HTTPException\MethodNotAllowedException If a rule matched but the method didn't
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* @throws HTTPException\NotFoundException If no rule matched
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*/
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private function getModuleClass()
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{
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$cmd = $this->args->getCommand();
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$cmd = '/' . ltrim($cmd, '/');
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$dispatcher = new Dispatcher\GroupCountBased($this->getCachedDispatchData());
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$this->parameters = [];
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$routeInfo = $dispatcher->dispatch($this->httpMethod, $cmd);
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if ($routeInfo[0] === Dispatcher::FOUND) {
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$moduleClass = $routeInfo[1];
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$this->parameters = $routeInfo[2];
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} elseif ($routeInfo[0] === Dispatcher::METHOD_NOT_ALLOWED) {
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throw new HTTPException\MethodNotAllowedException($this->l10n->t('Method not allowed for this module. Allowed method(s): %s', implode(', ', $routeInfo[1])));
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} else {
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throw new HTTPException\NotFoundException($this->l10n->t('Page not found.'));
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}
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return $moduleClass;
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}
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public function getModule(?string $module_class = null): ICanHandleRequests
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{
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$module_parameters = [$this->server];
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/**
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* ROUTING
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*
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* From the request URL, routing consists of obtaining the name of a BaseModule-extending class of which the
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* post() and/or content() static methods can be respectively called to produce a data change or an output.
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**/
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try {
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$module_class = $module_class ?? $this->getModuleClass();
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$module_parameters[] = $this->parameters;
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} catch (MethodNotAllowedException $e) {
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$module_class = MethodNotAllowed::class;
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} catch (NotFoundException $e) {
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$moduleName = $this->args->getModuleName();
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// Then we try addon-provided modules that we wrap in the LegacyModule class
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if (Addon::isEnabled($moduleName) && file_exists("addon/{$moduleName}/{$moduleName}.php")) {
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//Check if module is an app and if public access to apps is allowed or not
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$privateapps = $this->config->get('config', 'private_addons', false);
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if ((!local_user()) && Hook::isAddonApp($moduleName) && $privateapps) {
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throw new MethodNotAllowedException($this->l10n->t("You must be logged in to use addons. "));
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} else {
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include_once "addon/{$moduleName}/{$moduleName}.php";
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if (function_exists($moduleName . '_module')) {
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$module_parameters[] = "addon/{$moduleName}/{$moduleName}.php";
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$module_class = LegacyModule::class;
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}
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}
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}
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/* Finally, we look for a 'standard' program module in the 'mod' directory
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* We emulate a Module class through the LegacyModule class
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*/
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if (!$module_class && file_exists("mod/{$moduleName}.php")) {
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$module_parameters[] = "mod/{$moduleName}.php";
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$module_class = LegacyModule::class;
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}
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$module_class = $module_class ?: PageNotFound::class;
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}
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$stamp = microtime(true);
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try {
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/** @var ICanHandleRequests $module */
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return $this->dice->create($module_class, $module_parameters);
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} finally {
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if ($this->dice_profiler_threshold > 0) {
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$dur = floatval(microtime(true) - $stamp);
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if ($dur >= $this->dice_profiler_threshold) {
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$this->logger->warning('Dice module creation lasts too long.', ['duration' => round($dur, 3), 'module' => $module_class, 'parameters' => $module_parameters]);
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}
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}
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}
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}
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/**
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* If a base routes file path has been provided, we can load routes from it if the cache misses.
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*
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* @return array
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* @throws HTTPException\InternalServerErrorException
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*/
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private function getDispatchData()
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{
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$dispatchData = [];
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if ($this->baseRoutesFilepath) {
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$dispatchData = require $this->baseRoutesFilepath;
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if (!is_array($dispatchData)) {
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throw new HTTPException\InternalServerErrorException('Invalid base routes file');
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}
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}
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$this->loadRoutes($dispatchData);
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return $this->routeCollector->getData();
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}
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/**
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* We cache the dispatch data for speed, as computing the current routes (version 2020.09)
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* takes about 850ms for each requests.
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*
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* The cached "routerDispatchData" lasts for a day, and must be cleared manually when there
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* is any changes in the enabled addons list.
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*
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* Additionally, we check for the base routes file last modification time to automatically
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* trigger re-computing the dispatch data.
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*
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* @return array|mixed
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* @throws HTTPException\InternalServerErrorException
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*/
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private function getCachedDispatchData()
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{
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$routerDispatchData = $this->cache->get('routerDispatchData');
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$lastRoutesFileModifiedTime = $this->cache->get('lastRoutesFileModifiedTime');
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$forceRecompute = false;
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if ($this->baseRoutesFilepath) {
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$routesFileModifiedTime = filemtime($this->baseRoutesFilepath);
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$forceRecompute = $lastRoutesFileModifiedTime != $routesFileModifiedTime;
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}
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if (!$forceRecompute && $routerDispatchData) {
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return $routerDispatchData;
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}
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if (!$this->lock->acquire('getCachedDispatchData', 0)) {
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// Immediately return uncached data when we can't aquire a lock
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return $this->getDispatchData();
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}
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$routerDispatchData = $this->getDispatchData();
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$this->cache->set('routerDispatchData', $routerDispatchData, Duration::DAY);
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if (!empty($routesFileModifiedTime)) {
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$this->cache->set('lastRoutesFileModifiedTime', $routesFileModifiedTime, Duration::MONTH);
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}
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if ($this->lock->isLocked('getCachedDispatchData')) {
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$this->lock->release('getCachedDispatchData');
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}
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return $routerDispatchData;
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}
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}
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