309 lines
9 KiB
PHP
309 lines
9 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\Module;
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use Friendica\App;
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use Friendica\App\Router;
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use Friendica\BaseModule;
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use Friendica\Core\L10n;
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use Friendica\Core\Logger;
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use Friendica\Core\System;
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use Friendica\DI;
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use Friendica\Model\Contact;
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use Friendica\Model\Post;
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use Friendica\Model\User;
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use Friendica\Module\Api\ApiResponse;
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use Friendica\Network\HTTPException;
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use Friendica\Security\BasicAuth;
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use Friendica\Security\OAuth;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Profiler;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Log\LoggerInterface;
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class BaseApi extends BaseModule
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{
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const LOG_PREFIX = 'API {action} - ';
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const SCOPE_READ = 'read';
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const SCOPE_WRITE = 'write';
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const SCOPE_FOLLOW = 'follow';
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const SCOPE_PUSH = 'push';
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/**
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* @var array
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*/
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protected static $boundaries = [];
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/**
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* @var array
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*/
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protected static $request = [];
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/** @var App */
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protected $app;
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/** @var ApiResponse */
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protected $response;
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public function __construct(App $app, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, ApiResponse $response, array $server, array $parameters = [])
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{
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parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
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$this->app = $app;
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}
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/**
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* Additionally checks, if the caller is permitted to do this action
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*
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* {@inheritDoc}
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*
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* @throws HTTPException\ForbiddenException
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*/
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public function run(array $request = [], bool $scopecheck = true): ResponseInterface
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{
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if ($scopecheck) {
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switch ($this->args->getMethod()) {
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case Router::DELETE:
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case Router::PATCH:
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case Router::POST:
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case Router::PUT:
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self::checkAllowedScope(self::SCOPE_WRITE);
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if (!self::getCurrentUserID()) {
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throw new HTTPException\ForbiddenException($this->t('Permission denied.'));
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}
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break;
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}
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}
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return parent::run($request);
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}
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/**
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* Processes data from GET requests and sets defaults
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*
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* @param array $defaults Associative array of expected request keys and their default typed value. A null
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* value will remove the request key from the resulting value array.
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* @param array $request Custom REQUEST array, superglobal instead
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* @return array request data
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* @throws \Exception
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*/
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public function getRequest(array $defaults, array $request): array
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{
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self::$request = $request;
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self::$boundaries = [];
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unset(self::$request['pagename']);
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return $this->checkDefaults($defaults, $request);
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}
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/**
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* Set boundaries for the "link" header
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* @param array $boundaries
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* @param int $id
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*/
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protected static function setBoundaries(int $id)
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{
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if (!isset(self::$boundaries['min'])) {
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self::$boundaries['min'] = $id;
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}
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if (!isset(self::$boundaries['max'])) {
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self::$boundaries['max'] = $id;
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}
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self::$boundaries['min'] = min(self::$boundaries['min'], $id);
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self::$boundaries['max'] = max(self::$boundaries['max'], $id);
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}
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/**
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* Set the "link" header with "next" and "prev" links
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* @return void
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*/
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protected static function setLinkHeader()
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{
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if (empty(self::$boundaries)) {
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return;
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}
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$request = self::$request;
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unset($request['min_id']);
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unset($request['max_id']);
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unset($request['since_id']);
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$prev_request = $next_request = $request;
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$prev_request['min_id'] = self::$boundaries['max'];
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$next_request['max_id'] = self::$boundaries['min'];
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$command = DI::baseUrl() . '/' . DI::args()->getCommand();
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$prev = $command . '?' . http_build_query($prev_request);
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$next = $command . '?' . http_build_query($next_request);
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header('Link: <' . $next . '>; rel="next", <' . $prev . '>; rel="prev"');
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}
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/**
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* Get current application token
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*
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* @return array token
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*/
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public static function getCurrentApplication()
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{
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$token = OAuth::getCurrentApplicationToken();
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if (empty($token)) {
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$token = BasicAuth::getCurrentApplicationToken();
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}
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return $token;
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}
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/**
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* Get current user id, returns 0 if not logged in
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*
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* @return int User ID
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*/
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public static function getCurrentUserID()
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{
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$uid = OAuth::getCurrentUserID();
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if (empty($uid)) {
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$uid = BasicAuth::getCurrentUserID(false);
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}
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return (int)$uid;
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}
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/**
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* Check if the provided scope does exist.
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* halts execution on missing scope or when not logged in.
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*
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* @param string $scope the requested scope (read, write, follow, push)
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*/
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public static function checkAllowedScope(string $scope)
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{
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$token = self::getCurrentApplication();
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if (empty($token)) {
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Logger::notice('Empty application token');
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DI::mstdnError()->Forbidden();
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}
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if (!isset($token[$scope])) {
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Logger::warning('The requested scope does not exist', ['scope' => $scope, 'application' => $token]);
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DI::mstdnError()->Forbidden();
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}
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if (empty($token[$scope])) {
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Logger::warning('The requested scope is not allowed', ['scope' => $scope, 'application' => $token]);
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DI::mstdnError()->Forbidden();
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}
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}
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public static function checkThrottleLimit()
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{
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$uid = self::getCurrentUserID();
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// Check for throttling (maximum posts per day, week and month)
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$throttle_day = DI::config()->get('system', 'throttle_limit_day');
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if ($throttle_day > 0) {
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$datefrom = date(DateTimeFormat::MYSQL, time() - 24*60*60);
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$condition = ["`gravity` = ? AND `uid` = ? AND `wall` AND `received` > ?", GRAVITY_PARENT, $uid, $datefrom];
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$posts_day = Post::countThread($condition);
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if ($posts_day > $throttle_day) {
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Logger::info('Daily posting limit reached', ['uid' => $uid, 'posts' => $posts_day, 'limit' => $throttle_day]);
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$error = DI::l10n()->t('Too Many Requests');
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$error_description = DI::l10n()->tt("Daily posting limit of %d post reached. The post was rejected.", "Daily posting limit of %d posts reached. The post was rejected.", $throttle_day);
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$errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
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System::jsonError(429, $errorobj->toArray());
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}
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}
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$throttle_week = DI::config()->get('system', 'throttle_limit_week');
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if ($throttle_week > 0) {
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$datefrom = date(DateTimeFormat::MYSQL, time() - 24*60*60*7);
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$condition = ["`gravity` = ? AND `uid` = ? AND `wall` AND `received` > ?", GRAVITY_PARENT, $uid, $datefrom];
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$posts_week = Post::countThread($condition);
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if ($posts_week > $throttle_week) {
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Logger::info('Weekly posting limit reached', ['uid' => $uid, 'posts' => $posts_week, 'limit' => $throttle_week]);
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$error = DI::l10n()->t('Too Many Requests');
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$error_description = DI::l10n()->tt("Weekly posting limit of %d post reached. The post was rejected.", "Weekly posting limit of %d posts reached. The post was rejected.", $throttle_week);
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$errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
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System::jsonError(429, $errorobj->toArray());
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}
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}
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$throttle_month = DI::config()->get('system', 'throttle_limit_month');
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if ($throttle_month > 0) {
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$datefrom = date(DateTimeFormat::MYSQL, time() - 24*60*60*30);
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$condition = ["`gravity` = ? AND `uid` = ? AND `wall` AND `received` > ?", GRAVITY_PARENT, $uid, $datefrom];
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$posts_month = Post::countThread($condition);
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if ($posts_month > $throttle_month) {
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Logger::info('Monthly posting limit reached', ['uid' => $uid, 'posts' => $posts_month, 'limit' => $throttle_month]);
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$error = DI::l10n()->t('Too Many Requests');
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$error_description = DI::l10n()->t("Monthly posting limit of %d post reached. The post was rejected.", "Monthly posting limit of %d posts reached. The post was rejected.", $throttle_month);
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$errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
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System::jsonError(429, $errorobj->toArray());
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}
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}
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}
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public static function getContactIDForSearchterm(string $screen_name = null, string $profileurl = null, int $cid = null, int $uid)
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{
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if (!empty($cid)) {
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return $cid;
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}
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if (!empty($profileurl)) {
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return Contact::getIdForURL($profileurl);
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}
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if (empty($cid) && !empty($screen_name)) {
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if (strpos($screen_name, '@') !== false) {
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return Contact::getIdForURL($screen_name, 0, false);
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}
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$user = User::getByNickname($screen_name, ['uid']);
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if (!empty($user['uid'])) {
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return Contact::getPublicIdByUserId($user['uid']);
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}
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}
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if ($uid != 0) {
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return Contact::getPublicIdByUserId($uid);
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}
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return null;
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}
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}
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