406 lines
12 KiB
PHP
406 lines
12 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, 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\BaseModule;
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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\Post;
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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\HTTPInputData;
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require_once __DIR__ . '/../../include/api.php';
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class BaseApi extends BaseModule
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{
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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 string json|xml|rss|atom
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*/
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protected static $format = 'json';
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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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public static function init(array $parameters = [])
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{
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$arguments = DI::args();
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if (substr($arguments->getCommand(), -4) === '.xml') {
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self::$format = 'xml';
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}
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if (substr($arguments->getCommand(), -4) === '.rss') {
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self::$format = 'rss';
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}
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if (substr($arguments->getCommand(), -4) === '.atom') {
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self::$format = 'atom';
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}
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}
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public static function delete(array $parameters = [])
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{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$a = DI::app();
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if (!empty($a->user['uid']) && $a->user['uid'] != self::getCurrentUserID()) {
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throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
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}
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}
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public static function patch(array $parameters = [])
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{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$a = DI::app();
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if (!empty($a->user['uid']) && $a->user['uid'] != self::getCurrentUserID()) {
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throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
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}
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}
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public static function post(array $parameters = [])
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{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$a = DI::app();
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if (!empty($a->user['uid']) && $a->user['uid'] != self::getCurrentUserID()) {
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throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
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}
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}
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public static function put(array $parameters = [])
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{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$a = DI::app();
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if (!empty($a->user['uid']) && $a->user['uid'] != self::getCurrentUserID()) {
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throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
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}
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}
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/**
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* Quit execution with the message that the endpoint isn't implemented
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*
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* @param string $method
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* @return void
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*/
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public static function unsupported(string $method = 'all')
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{
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$path = DI::args()->getQueryString();
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Logger::info('Unimplemented API call', ['method' => $method, 'path' => $path, 'agent' => $_SERVER['HTTP_USER_AGENT'] ?? '', 'request' => HTTPInputData::process()]);
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$error = DI::l10n()->t('API endpoint %s %s is not implemented', strtoupper($method), $path);
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$error_description = DI::l10n()->t('The API endpoint is currently not implemented but might be in the future.');
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$errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
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System::jsonError(501, $errorobj->toArray());
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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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* @return array request data
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*/
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public static function getRequest(array $defaults)
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{
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$httpinput = HTTPInputData::process();
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$input = array_merge($httpinput['variables'], $httpinput['files'], $_REQUEST);
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self::$request = $input;
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self::$boundaries = [];
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unset(self::$request['pagename']);
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$request = [];
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foreach ($defaults as $parameter => $defaultvalue) {
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if (is_string($defaultvalue)) {
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$request[$parameter] = $input[$parameter] ?? $defaultvalue;
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} elseif (is_int($defaultvalue)) {
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$request[$parameter] = (int)($input[$parameter] ?? $defaultvalue);
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} elseif (is_float($defaultvalue)) {
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$request[$parameter] = (float)($input[$parameter] ?? $defaultvalue);
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} elseif (is_array($defaultvalue)) {
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$request[$parameter] = $input[$parameter] ?? [];
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} elseif (is_bool($defaultvalue)) {
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$request[$parameter] = in_array(strtolower($input[$parameter] ?? ''), ['true', '1']);
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} else {
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Logger::notice('Unhandled default value type', ['parameter' => $parameter, 'type' => gettype($defaultvalue)]);
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}
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}
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foreach ($input ?? [] as $parameter => $value) {
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if ($parameter == 'pagename') {
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continue;
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}
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if (!in_array($parameter, array_keys($defaults))) {
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Logger::notice('Unhandled request field', ['parameter' => $parameter, 'value' => $value, 'command' => DI::args()->getCommand()]);
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}
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}
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Logger::debug('Got request parameters', ['request' => $request, 'command' => DI::args()->getCommand()]);
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return $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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* @return array
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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", <' . $prev . '>; rel="prev"');
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}
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/**
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* Get current application token
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*
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* @return array token
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*/
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protected static function getCurrentApplication()
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{
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$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 $token;
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}
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/**
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* Get current user id, returns 0 if not logged in
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*
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* @return int User ID
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*/
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protected static function getCurrentUserID()
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{
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$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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/**
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* Get user info array.
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*
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* @param int|string $contact_id Contact ID or URL
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* @return array|bool
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* @throws HTTPException\BadRequestException
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* @throws HTTPException\InternalServerErrorException
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* @throws HTTPException\UnauthorizedException
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* @throws \ImagickException
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*/
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protected static function getUser($contact_id = null)
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{
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return api_get_user(DI::app(), $contact_id);
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}
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/**
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* Formats the data according to the data type
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*
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* @param string $root_element
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* @param array $data An array with a single element containing the returned result
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* @return false|string
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*/
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protected static function format(string $root_element, array $data)
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{
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$return = api_format_data($root_element, self::$format, $data);
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switch (self::$format) {
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case "xml":
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header("Content-Type: text/xml");
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break;
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case "json":
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header("Content-Type: application/json");
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if (!empty($return)) {
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$json = json_encode(end($return));
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if (!empty($_GET['callback'])) {
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$json = $_GET['callback'] . "(" . $json . ")";
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}
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$return = $json;
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}
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break;
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case "rss":
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header("Content-Type: application/rss+xml");
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$return = '<?xml version="1.0" encoding="UTF-8"?>' . "\n" . $return;
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break;
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case "atom":
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header("Content-Type: application/atom+xml");
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$return = '<?xml version="1.0" encoding="UTF-8"?>' . "\n" . $return;
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break;
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}
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return $return;
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}
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/**
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* Creates the XML from a JSON style array
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*
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* @param $data
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* @param $root_element
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* @return string
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*/
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protected static function createXml($data, $root_element)
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{
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return api_create_xml($data, $root_element);
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}
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}
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