src/Module/BaseApi.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Module;
  23
  24 use Friendica\BaseModule;
  25 use Friendica\Core\Logger;
  26 use Friendica\Core\System;
  27 use Friendica\DI;
  28 use Friendica\Model\Post;
  29 use Friendica\Network\HTTPException;
  30 use Friendica\Security\BasicAuth;
  31 use Friendica\Security\OAuth;
  32 use Friendica\Util\Arrays;
  33 use Friendica\Util\DateTimeFormat;
  34 use Friendica\Util\HTTPInputData;
  35 use Friendica\Util\XML;
  36
  37 require_once __DIR__ . '/../../include/api.php';
  38
  39 class BaseApi extends BaseModule
  40 {
  41         const SCOPE_READ   = 'read';
  42         const SCOPE_WRITE  = 'write';
  43         const SCOPE_FOLLOW = 'follow';
  44         const SCOPE_PUSH   = 'push';
  45
  46         /**
  47          * @var array
  48          */
  49         protected static $boundaries = [];
  50
  51         /**
  52          * @var array
  53          */
  54         protected static $request = [];
  55
  56         public function delete()
  57         {
  58                 self::checkAllowedScope(self::SCOPE_WRITE);
  59
  60                 if (!DI::app()->isLoggedIn()) {
  61                         throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
  62                 }
  63         }
  64
  65         public function patch()
  66         {
  67                 self::checkAllowedScope(self::SCOPE_WRITE);
  68
  69                 if (!DI::app()->isLoggedIn()) {
  70                         throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
  71                 }
  72         }
  73
  74         public function post()
  75         {
  76                 self::checkAllowedScope(self::SCOPE_WRITE);
  77
  78                 if (!DI::app()->isLoggedIn()) {
  79                         throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
  80                 }
  81         }
  82
  83         public function put()
  84         {
  85                 self::checkAllowedScope(self::SCOPE_WRITE);
  86
  87                 if (!DI::app()->isLoggedIn()) {
  88                         throw new HTTPException\ForbiddenException(DI::l10n()->t('Permission denied.'));
  89                 }
  90         }
  91
  92         /**
  93          * Processes data from GET requests and sets defaults
  94          *
  95          * @return array request data
  96          */
  97         public static function getRequest(array $defaults)
  98         {
  99                 $httpinput = HTTPInputData::process();
 100                 $input = array_merge($httpinput['variables'], $httpinput['files'], $_REQUEST);
 101
 102                 self::$request    = $input;
 103                 self::$boundaries = [];
 104
 105                 unset(self::$request['pagename']);
 106
 107                 $request = [];
 108
 109                 foreach ($defaults as $parameter => $defaultvalue) {
 110                         if (is_string($defaultvalue)) {
 111                                 $request[$parameter] = $input[$parameter] ?? $defaultvalue;
 112                         } elseif (is_int($defaultvalue)) {
 113                                 $request[$parameter] = (int)($input[$parameter] ?? $defaultvalue);
 114                         } elseif (is_float($defaultvalue)) {
 115                                 $request[$parameter] = (float)($input[$parameter] ?? $defaultvalue);
 116                         } elseif (is_array($defaultvalue)) {
 117                                 $request[$parameter] = $input[$parameter] ?? [];
 118                         } elseif (is_bool($defaultvalue)) {
 119                                 $request[$parameter] = in_array(strtolower($input[$parameter] ?? ''), ['true', '1']);
 120                         } else {
 121                                 Logger::notice('Unhandled default value type', ['parameter' => $parameter, 'type' => gettype($defaultvalue)]);
 122                         }
 123                 }
 124
 125                 foreach ($input ?? [] as $parameter => $value) {
 126                         if ($parameter == 'pagename') {
 127                                 continue;
 128                         }
 129                         if (!in_array($parameter, array_keys($defaults))) {
 130                                 Logger::notice('Unhandled request field', ['parameter' => $parameter, 'value' => $value, 'command' => DI::args()->getCommand()]);
 131                         }
 132                 }
 133
 134                 Logger::debug('Got request parameters', ['request' => $request, 'command' => DI::args()->getCommand()]);
 135                 return $request;
 136         }
 137
 138         /**
 139          * Set boundaries for the "link" header
 140          * @param array $boundaries
 141          * @param int $id
 142          */
 143         protected static function setBoundaries(int $id)
 144         {
 145                 if (!isset(self::$boundaries['min'])) {
 146                         self::$boundaries['min'] = $id;
 147                 }
 148
 149                 if (!isset(self::$boundaries['max'])) {
 150                         self::$boundaries['max'] = $id;
 151                 }
 152
 153                 self::$boundaries['min'] = min(self::$boundaries['min'], $id);
 154                 self::$boundaries['max'] = max(self::$boundaries['max'], $id);
 155         }
 156
 157         /**
 158          * Set the "link" header with "next" and "prev" links
 159          * @return void
 160          */
 161         protected static function setLinkHeader()
 162         {
 163                 if (empty(self::$boundaries)) {
 164                         return;
 165                 }
 166
 167                 $request = self::$request;
 168
 169                 unset($request['min_id']);
 170                 unset($request['max_id']);
 171                 unset($request['since_id']);
 172
 173                 $prev_request = $next_request = $request;
 174
 175                 $prev_request['min_id'] = self::$boundaries['max'];
 176                 $next_request['max_id'] = self::$boundaries['min'];
 177
 178                 $command = DI::baseUrl() . '/' . DI::args()->getCommand();
 179
 180                 $prev = $command . '?' . http_build_query($prev_request);
 181                 $next = $command . '?' . http_build_query($next_request);
 182
 183                 header('Link: <' . $next . '>; rel="next", <' . $prev . '>; rel="prev"');
 184         }
 185
 186         /**
 187          * Get current application token
 188          *
 189          * @return array token
 190          */
 191         protected static function getCurrentApplication()
 192         {
 193                 $token = OAuth::getCurrentApplicationToken();
 194
 195                 if (empty($token)) {
 196                         $token = BasicAuth::getCurrentApplicationToken();
 197                 }
 198
 199                 return $token;
 200         }
 201
 202         /**
 203          * Get current user id, returns 0 if not logged in
 204          *
 205          * @return int User ID
 206          */
 207         public static function getCurrentUserID()
 208         {
 209                 $uid = OAuth::getCurrentUserID();
 210
 211                 if (empty($uid)) {
 212                         $uid = BasicAuth::getCurrentUserID(false);
 213                 }
 214
 215                 return (int)$uid;
 216         }
 217
 218         /**
 219          * Check if the provided scope does exist.
 220          * halts execution on missing scope or when not logged in.
 221          *
 222          * @param string $scope the requested scope (read, write, follow, push)
 223          */
 224         public static function checkAllowedScope(string $scope)
 225         {
 226                 $token = self::getCurrentApplication();
 227
 228                 if (empty($token)) {
 229                         Logger::notice('Empty application token');
 230                         DI::mstdnError()->Forbidden();
 231                 }
 232
 233                 if (!isset($token[$scope])) {
 234                         Logger::warning('The requested scope does not exist', ['scope' => $scope, 'application' => $token]);
 235                         DI::mstdnError()->Forbidden();
 236                 }
 237
 238                 if (empty($token[$scope])) {
 239                         Logger::warning('The requested scope is not allowed', ['scope' => $scope, 'application' => $token]);
 240                         DI::mstdnError()->Forbidden();
 241                 }
 242         }
 243
 244         public static function checkThrottleLimit()
 245         {
 246                 $uid = self::getCurrentUserID();
 247
 248                 // Check for throttling (maximum posts per day, week and month)
 249                 $throttle_day = DI::config()->get('system', 'throttle_limit_day');
 250                 if ($throttle_day > 0) {
 251                         $datefrom = date(DateTimeFormat::MYSQL, time() - 24*60*60);
 252
 253                         $condition = ["`gravity` = ? AND `uid` = ? AND `wall` AND `received` > ?", GRAVITY_PARENT, $uid, $datefrom];
 254                         $posts_day = Post::countThread($condition);
 255
 256                         if ($posts_day > $throttle_day) {
 257                                 Logger::info('Daily posting limit reached', ['uid' => $uid, 'posts' => $posts_day, 'limit' => $throttle_day]);
 258                                 $error = DI::l10n()->t('Too Many Requests');
 259                                 $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);
 260                                 $errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
 261                                 System::jsonError(429, $errorobj->toArray());
 262                         }
 263                 }
 264
 265                 $throttle_week = DI::config()->get('system', 'throttle_limit_week');
 266                 if ($throttle_week > 0) {
 267                         $datefrom = date(DateTimeFormat::MYSQL, time() - 24*60*60*7);
 268
 269                         $condition = ["`gravity` = ? AND `uid` = ? AND `wall` AND `received` > ?", GRAVITY_PARENT, $uid, $datefrom];
 270                         $posts_week = Post::countThread($condition);
 271
 272                         if ($posts_week > $throttle_week) {
 273                                 Logger::info('Weekly posting limit reached', ['uid' => $uid, 'posts' => $posts_week, 'limit' => $throttle_week]);
 274                                 $error = DI::l10n()->t('Too Many Requests');
 275                                 $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);
 276                                 $errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
 277                                 System::jsonError(429, $errorobj->toArray());
 278                         }
 279                 }
 280
 281                 $throttle_month = DI::config()->get('system', 'throttle_limit_month');
 282                 if ($throttle_month > 0) {
 283                         $datefrom = date(DateTimeFormat::MYSQL, time() - 24*60*60*30);
 284
 285                         $condition = ["`gravity` = ? AND `uid` = ? AND `wall` AND `received` > ?", GRAVITY_PARENT, $uid, $datefrom];
 286                         $posts_month = Post::countThread($condition);
 287
 288                         if ($posts_month > $throttle_month) {
 289                                 Logger::info('Monthly posting limit reached', ['uid' => $uid, 'posts' => $posts_month, 'limit' => $throttle_month]);
 290                                 $error = DI::l10n()->t('Too Many Requests');
 291                                 $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);
 292                                 $errorobj = new \Friendica\Object\Api\Mastodon\Error($error, $error_description);
 293                                 System::jsonError(429, $errorobj->toArray());
 294                         }
 295                 }
 296         }
 297
 298         /**
 299          * Get user info array.
 300          *
 301          * @param int|string $contact_id Contact ID or URL
 302          * @return array|bool
 303          * @throws HTTPException\BadRequestException
 304          * @throws HTTPException\InternalServerErrorException
 305          * @throws HTTPException\UnauthorizedException
 306          * @throws \ImagickException
 307          */
 308         protected static function getUser($contact_id = null)
 309         {
 310                 return api_get_user($contact_id);
 311         }
 312 }