friendica/src/Module/BaseApi.php

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<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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namespace Friendica\Module;
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use Friendica\BaseModule;
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use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\DI;
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use Friendica\Network\HTTPException;
use Friendica\Security\BasicAuth;
use Friendica\Security\OAuth;
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';
const SCOPE_WRITE = 'write';
const SCOPE_FOLLOW = 'follow';
const SCOPE_PUSH = 'push';
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/**
* @var string json|xml|rss|atom
*/
protected static $format = 'json';
public static function init(array $parameters = [])
{
$arguments = DI::args();
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if (substr($arguments->getCommand(), -4) === '.xml') {
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self::$format = 'xml';
}
if (substr($arguments->getCommand(), -4) === '.rss') {
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self::$format = 'rss';
}
if (substr($arguments->getCommand(), -4) === '.atom') {
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self::$format = 'atom';
}
}
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public static function delete(array $parameters = [])
{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$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.'));
}
}
public static function patch(array $parameters = [])
{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$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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public static function post(array $parameters = [])
{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$a = DI::app();
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if (!empty($a->user['uid']) && $a->user['uid'] != self::getCurrentUserID()) {
throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
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}
}
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public static function put(array $parameters = [])
{
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self::checkAllowedScope(self::SCOPE_WRITE);
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$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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/**
* Quit execution with the message that the endpoint isn't implemented
*
* @param string $method
* @return void
*/
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public static function unsupported(string $method = 'all')
{
$path = DI::args()->getQueryString();
Logger::info('Unimplemented API call', ['method' => $method, 'path' => $path, 'agent' => $_SERVER['HTTP_USER_AGENT'] ?? '', 'request' => HTTPInputData::process()]);
$error = DI::l10n()->t('API endpoint %s %s is not implemented', strtoupper($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);
System::jsonError(501, $errorobj->toArray());
}
/**
* Processes data from GET requests and sets defaults
*
* @return array request data
*/
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public static function getRequest(array $defaults)
{
$httpinput = HTTPInputData::process();
$input = array_merge($httpinput['variables'], $httpinput['files'], $_REQUEST);
$request = [];
foreach ($defaults as $parameter => $defaultvalue) {
if (is_string($defaultvalue)) {
$request[$parameter] = $input[$parameter] ?? $defaultvalue;
} elseif (is_int($defaultvalue)) {
$request[$parameter] = (int)($input[$parameter] ?? $defaultvalue);
} elseif (is_float($defaultvalue)) {
$request[$parameter] = (float)($input[$parameter] ?? $defaultvalue);
} elseif (is_array($defaultvalue)) {
$request[$parameter] = $input[$parameter] ?? [];
} elseif (is_bool($defaultvalue)) {
$request[$parameter] = in_array(strtolower($input[$parameter] ?? ''), ['true', '1']);
} else {
Logger::notice('Unhandled default value type', ['parameter' => $parameter, 'type' => gettype($defaultvalue)]);
}
}
foreach ($input ?? [] as $parameter => $value) {
if ($parameter == 'pagename') {
continue;
}
if (!in_array($parameter, array_keys($defaults))) {
Logger::notice('Unhandled request field', ['parameter' => $parameter, 'value' => $value, 'command' => DI::args()->getCommand()]);
}
}
Logger::debug('Got request parameters', ['request' => $request, 'command' => DI::args()->getCommand()]);
return $request;
}
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/**
* Get current application token
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*
* @return array token
*/
protected static function getCurrentApplication()
{
$token = OAuth::getCurrentApplicationToken();
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if (empty($token)) {
$token = BasicAuth::getCurrentApplicationToken();
}
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return $token;
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}
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/**
* Get current user id, returns 0 if not logged in
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*
* @return int User ID
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*/
public static function getCurrentUserID()
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{
$uid = OAuth::getCurrentUserID();
if (empty($uid)) {
$uid = BasicAuth::getCurrentUserID(false);
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}
return (int)$uid;
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}
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/**
* Check if the provided scope does exist.
* halts execution on missing scope or when not logged in.
*
* @param string $scope the requested scope (read, write, follow, push)
*/
public static function checkAllowedScope(string $scope)
{
$token = self::getCurrentApplication();
if (empty($token)) {
Logger::notice('Empty application token');
DI::mstdnError()->Forbidden();
}
if (!isset($token[$scope])) {
Logger::warning('The requested scope does not exist', ['scope' => $scope, 'application' => $token]);
DI::mstdnError()->Forbidden();
}
if (empty($token[$scope])) {
Logger::warning('The requested scope is not allowed', ['scope' => $scope, 'application' => $token]);
DI::mstdnError()->Forbidden();
}
}
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/**
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* Get user info array.
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*
* @param int|string $contact_id Contact ID or URL
* @return array|bool
* @throws HTTPException\BadRequestException
* @throws HTTPException\InternalServerErrorException
* @throws HTTPException\UnauthorizedException
* @throws \ImagickException
*/
protected static function getUser($contact_id = null)
{
return api_get_user(DI::app(), $contact_id);
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}
/**
* Formats the data according to the data type
*
* @param string $root_element
* @param array $data An array with a single element containing the returned result
* @return false|string
*/
protected static function format(string $root_element, array $data)
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{
$return = api_format_data($root_element, self::$format, $data);
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switch (self::$format) {
case "xml":
header("Content-Type: text/xml");
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break;
case "json":
header("Content-Type: application/json");
if (!empty($return)) {
$json = json_encode(end($return));
if (!empty($_GET['callback'])) {
$json = $_GET['callback'] . "(" . $json . ")";
}
$return = $json;
}
break;
case "rss":
header("Content-Type: application/rss+xml");
$return = '<?xml version="1.0" encoding="UTF-8"?>' . "\n" . $return;
break;
case "atom":
header("Content-Type: application/atom+xml");
$return = '<?xml version="1.0" encoding="UTF-8"?>' . "\n" . $return;
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break;
}
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return $return;
}
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/**
* Creates the XML from a JSON style array
*
* @param $data
* @param $root_element
* @return string
*/
protected static function createXml($data, $root_element)
{
return api_create_xml($data, $root_element);
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}
}