src/Model/APContact.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\Model;
  23
  24 use Friendica\Content\Text\HTML;
  25 use Friendica\Core\Cache\Duration;
  26 use Friendica\Core\Logger;
  27 use Friendica\Core\System;
  28 use Friendica\Database\DBA;
  29 use Friendica\Database\DBStructure;
  30 use Friendica\DI;
  31 use Friendica\Network\Probe;
  32 use Friendica\Protocol\ActivityNamespace;
  33 use Friendica\Protocol\ActivityPub;
  34 use Friendica\Protocol\ActivityPub\Transmitter;
  35 use Friendica\Util\Crypto;
  36 use Friendica\Util\DateTimeFormat;
  37 use Friendica\Util\HTTPSignature;
  38 use Friendica\Util\JsonLD;
  39 use Friendica\Util\Network;
  40 use Friendica\Util\Strings;
  41
  42 class APContact
  43 {
  44         /**
  45          * Fetch webfinger data
  46          *
  47          * @param string $addr Address
  48          * @return array webfinger data
  49          */
  50         private static function fetchWebfingerData(string $addr)
  51         {
  52                 $addr_parts = explode('@', $addr);
  53                 if (count($addr_parts) != 2) {
  54                         return [];
  55                 }
  56
  57                 if (Contact::isLocal($addr) && ($local_uid = User::getIdForURL($addr)) && ($local_owner = User::getOwnerDataById($local_uid))) {
  58                         $data = [
  59                                 'addr'      => $local_owner['addr'],
  60                                 'baseurl'   => $local_owner['baseurl'],
  61                                 'url'       => $local_owner['url'],
  62                                 'subscribe' => $local_owner['baseurl'] . '/follow?url={uri}'];
  63
  64                         if (!empty($local_owner['alias']) && ($local_owner['url'] != $local_owner['alias'])) {
  65                                 $data['alias'] = $local_owner['alias'];
  66                         }
  67
  68                         return $data;
  69                 }
  70
  71                 $data = ['addr' => $addr];
  72                 $template = 'https://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
  73                 $webfinger = Probe::webfinger(str_replace('{uri}', urlencode($addr), $template), 'application/jrd+json');
  74                 if (empty($webfinger['links'])) {
  75                         $template = 'http://' . $addr_parts[1] . '/.well-known/webfinger?resource=acct:' . urlencode($addr);
  76                         $webfinger = Probe::webfinger(str_replace('{uri}', urlencode($addr), $template), 'application/jrd+json');
  77                         if (empty($webfinger['links'])) {
  78                                 return [];
  79                         }
  80                         $data['baseurl'] = 'http://' . $addr_parts[1];
  81                 } else {
  82                         $data['baseurl'] = 'https://' . $addr_parts[1];
  83                 }
  84
  85                 foreach ($webfinger['links'] as $link) {
  86                         if (empty($link['rel'])) {
  87                                 continue;
  88                         }
  89
  90                         if (!empty($link['template']) && ($link['rel'] == ActivityNamespace::OSTATUSSUB)) {
  91                                 $data['subscribe'] = $link['template'];
  92                         }
  93
  94                         if (!empty($link['href']) && !empty($link['type']) && ($link['rel'] == 'self') && ($link['type'] == 'application/activity+json')) {
  95                                 $data['url'] = $link['href'];
  96                         }
  97
  98                         if (!empty($link['href']) && !empty($link['type']) && ($link['rel'] == 'http://webfinger.net/rel/profile-page') && ($link['type'] == 'text/html')) {
  99                                 $data['alias'] = $link['href'];
 100                         }
 101                 }
 102
 103                 if (!empty($data['url']) && !empty($data['alias']) && ($data['url'] == $data['alias'])) {
 104                         unset($data['alias']);
 105                 }
 106
 107                 return $data;
 108         }
 109
 110         /**
 111          * Fetches a profile from a given url
 112          *
 113          * @param string  $url    profile url
 114          * @param boolean $update true = always update, false = never update, null = update when not found or outdated
 115          * @return array profile array
 116          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 117          * @throws \ImagickException
 118          */
 119         public static function getByURL($url, $update = null)
 120         {
 121                 if (empty($url)) {
 122                         return [];
 123                 }
 124
 125                 $fetched_contact = false;
 126
 127                 if (empty($update)) {
 128                         if (is_null($update)) {
 129                                 $ref_update = DateTimeFormat::utc('now - 1 month');
 130                         } else {
 131                                 $ref_update = DBA::NULL_DATETIME;
 132                         }
 133
 134                         $apcontact = DBA::selectFirst('apcontact', [], ['url' => $url]);
 135                         if (!DBA::isResult($apcontact)) {
 136                                 $apcontact = DBA::selectFirst('apcontact', [], ['alias' => $url]);
 137                         }
 138
 139                         if (!DBA::isResult($apcontact)) {
 140                                 $apcontact = DBA::selectFirst('apcontact', [], ['addr' => $url]);
 141                         }
 142
 143                         if (DBA::isResult($apcontact) && ($apcontact['updated'] > $ref_update) && !empty($apcontact['pubkey']) && !empty($apcontact['uri-id'])) {
 144                                 return $apcontact;
 145                         }
 146
 147                         if (!is_null($update)) {
 148                                 return DBA::isResult($apcontact) ? $apcontact : [];
 149                         }
 150
 151                         if (DBA::isResult($apcontact)) {
 152                                 $fetched_contact = $apcontact;
 153                         }
 154                 }
 155
 156                 $apcontact = [];
 157
 158                 $webfinger = empty(parse_url($url, PHP_URL_SCHEME));
 159                 if ($webfinger) {
 160                         $apcontact = self::fetchWebfingerData($url);
 161                         if (empty($apcontact['url'])) {
 162                                 return $fetched_contact;
 163                         }
 164                         $url = $apcontact['url'];
 165                 }
 166
 167                 // Detect multiple fast repeating request to the same address
 168                 // See https://github.com/friendica/friendica/issues/9303
 169                 $cachekey = 'apcontact:getByURL:' . $url;
 170                 $result = DI::cache()->get($cachekey);
 171                 if (!is_null($result)) {
 172                         Logger::notice('Multiple requests for the address', ['url' => $url, 'update' => $update, 'callstack' => System::callstack(20), 'result' => $result]);
 173                         if (!empty($fetched_contact)) {
 174                                 return $fetched_contact;
 175                         }
 176                 } else {
 177                         DI::cache()->set($cachekey, System::callstack(20), Duration::FIVE_MINUTES);
 178                 }
 179
 180                 if (Network::isLocalLink($url) && ($local_uid = User::getIdForURL($url))) {
 181                         $data  = Transmitter::getProfile($local_uid);
 182                         $local_owner = User::getOwnerDataById($local_uid);
 183                 }
 184
 185                 if (empty($data)) {
 186                         $local_owner = [];
 187
 188                         $curlResult = HTTPSignature::fetchRaw($url);
 189                         $failed = empty($curlResult) || empty($curlResult->getBody()) ||
 190                                 (!$curlResult->isSuccess() && ($curlResult->getReturnCode() != 410));
 191
 192                         if (!$failed) {
 193                                 $data = json_decode($curlResult->getBody(), true);
 194                                 $failed = empty($data) || !is_array($data);
 195                         }
 196
 197                         if (!$failed && ($curlResult->getReturnCode() == 410)) {
 198                                 $data = ['@context' => ActivityPub::CONTEXT, 'id' => $url, 'type' => 'Tombstone'];
 199                         }
 200
 201                         if ($failed) {
 202                                 self::markForArchival($fetched_contact ?: []);
 203                                 return $fetched_contact;
 204                         }
 205                 }
 206
 207                 $compacted = JsonLD::compact($data);
 208                 if (empty($compacted['@id'])) {
 209                         return $fetched_contact;
 210                 }
 211
 212                 $apcontact['url'] = $compacted['@id'];
 213                 $apcontact['uuid'] = JsonLD::fetchElement($compacted, 'diaspora:guid', '@value');
 214                 $apcontact['type'] = str_replace('as:', '', JsonLD::fetchElement($compacted, '@type'));
 215                 $apcontact['following'] = JsonLD::fetchElement($compacted, 'as:following', '@id');
 216                 $apcontact['followers'] = JsonLD::fetchElement($compacted, 'as:followers', '@id');
 217                 $apcontact['inbox'] = JsonLD::fetchElement($compacted, 'ldp:inbox', '@id');
 218                 self::unarchiveInbox($apcontact['inbox'], false);
 219
 220                 $apcontact['outbox'] = JsonLD::fetchElement($compacted, 'as:outbox', '@id');
 221
 222                 $apcontact['sharedinbox'] = '';
 223                 if (!empty($compacted['as:endpoints'])) {
 224                         $apcontact['sharedinbox'] = JsonLD::fetchElement($compacted['as:endpoints'], 'as:sharedInbox', '@id');
 225                         self::unarchiveInbox($apcontact['sharedinbox'], true);
 226                 }
 227
 228                 $apcontact['nick'] = JsonLD::fetchElement($compacted, 'as:preferredUsername', '@value') ?? '';
 229                 $apcontact['name'] = JsonLD::fetchElement($compacted, 'as:name', '@value');
 230
 231                 if (empty($apcontact['name'])) {
 232                         $apcontact['name'] = $apcontact['nick'];
 233                 }
 234
 235                 $apcontact['about'] = HTML::toBBCode(JsonLD::fetchElement($compacted, 'as:summary', '@value'));
 236
 237                 $apcontact['photo'] = JsonLD::fetchElement($compacted, 'as:icon', '@id');
 238                 if (is_array($apcontact['photo']) || !empty($compacted['as:icon']['as:url']['@id'])) {
 239                         $apcontact['photo'] = JsonLD::fetchElement($compacted['as:icon'], 'as:url', '@id');
 240                 }
 241
 242                 $apcontact['header'] = JsonLD::fetchElement($compacted, 'as:image', '@id');
 243                 if (is_array($apcontact['header']) || !empty($compacted['as:image']['as:url']['@id'])) {
 244                         $apcontact['header'] = JsonLD::fetchElement($compacted['as:image'], 'as:url', '@id');
 245                 }
 246
 247                 if (empty($apcontact['alias'])) {
 248                         $apcontact['alias'] = JsonLD::fetchElement($compacted, 'as:url', '@id');
 249                         if (is_array($apcontact['alias'])) {
 250                                 $apcontact['alias'] = JsonLD::fetchElement($compacted['as:url'], 'as:href', '@id');
 251                         }
 252                 }
 253
 254                 // Quit if none of the basic values are set
 255                 if (empty($apcontact['url']) || empty($apcontact['type']) || (($apcontact['type'] != 'Tombstone') && empty($apcontact['inbox']))) {
 256                         return $fetched_contact;
 257                 } elseif ($apcontact['type'] == 'Tombstone') {
 258                         // The "inbox" field must have a content
 259                         $apcontact['inbox'] = '';
 260                 }
 261
 262                 // Quit if this doesn't seem to be an account at all
 263                 if (!in_array($apcontact['type'], ActivityPub::ACCOUNT_TYPES)) {
 264                         return $fetched_contact;
 265                 }
 266
 267                 $parts = parse_url($apcontact['url']);
 268                 unset($parts['scheme']);
 269                 unset($parts['path']);
 270
 271                 if (empty($apcontact['addr'])) {
 272                         if (!empty($apcontact['nick']) && is_array($parts)) {
 273                                 $apcontact['addr'] = $apcontact['nick'] . '@' . str_replace('//', '', Network::unparseURL($parts));
 274                         } else {
 275                                 $apcontact['addr'] = '';
 276                         }
 277                 }
 278
 279                 $apcontact['pubkey'] = null;
 280                 if (!empty($compacted['w3id:publicKey'])) {
 281                         $apcontact['pubkey'] = trim(JsonLD::fetchElement($compacted['w3id:publicKey'], 'w3id:publicKeyPem', '@value'));
 282                         if (strstr($apcontact['pubkey'], 'RSA ')) {
 283                                 $apcontact['pubkey'] = Crypto::rsaToPem($apcontact['pubkey']);
 284                         }
 285                 }
 286
 287                 $apcontact['manually-approve'] = (int)JsonLD::fetchElement($compacted, 'as:manuallyApprovesFollowers');
 288
 289                 if (!empty($compacted['as:generator'])) {
 290                         $apcontact['baseurl'] = JsonLD::fetchElement($compacted['as:generator'], 'as:url', '@id');
 291                         $apcontact['generator'] = JsonLD::fetchElement($compacted['as:generator'], 'as:name', '@value');
 292                 }
 293
 294                 if (!empty($apcontact['following'])) {
 295                         if (!empty($local_owner)) {
 296                                 $following = ActivityPub\Transmitter::getContacts($local_owner, [Contact::SHARING, Contact::FRIEND], 'following');
 297                         } else {
 298                                 $following = ActivityPub::fetchContent($apcontact['following']);
 299                         }
 300                         if (!empty($following['totalItems'])) {
 301                                 // Mastodon seriously allows for this condition?
 302                                 // Jul 14 2021 - See https://mastodon.social/@BLUW for a negative following count
 303                                 if ($following['totalItems'] < 0) {
 304                                         $following['totalItems'] = 0;
 305                                 }
 306                                 $apcontact['following_count'] = $following['totalItems'];
 307                         }
 308                 }
 309
 310                 if (!empty($apcontact['followers'])) {
 311                         if (!empty($local_owner)) {
 312                                 $followers = ActivityPub\Transmitter::getContacts($local_owner, [Contact::FOLLOWER, Contact::FRIEND], 'followers');
 313                         } else {
 314                                 $followers = ActivityPub::fetchContent($apcontact['followers']);
 315                         }
 316                         if (!empty($followers['totalItems'])) {
 317                                 // Mastodon seriously allows for this condition?
 318                                 // Jul 14 2021 - See https://mastodon.online/@goes11 for a negative followers count
 319                                 if ($followers['totalItems'] < 0) {
 320                                         $followers['totalItems'] = 0;
 321                                 }
 322                                 $apcontact['followers_count'] = $followers['totalItems'];
 323                         }
 324                 }
 325
 326                 if (!empty($apcontact['outbox'])) {
 327                         if (!empty($local_owner)) {
 328                                 $outbox = ActivityPub\Transmitter::getOutbox($local_owner);
 329                         } else {
 330                                 $outbox = ActivityPub::fetchContent($apcontact['outbox']);
 331                         }
 332                         if (!empty($outbox['totalItems'])) {
 333                                 $apcontact['statuses_count'] = $outbox['totalItems'];
 334                         }
 335                 }
 336
 337                 $apcontact['discoverable'] = JsonLD::fetchElement($compacted, 'toot:discoverable', '@value');
 338
 339                 // To-Do
 340
 341                 // Unhandled
 342                 // tag, attachment, image, nomadicLocations, signature, featured, movedTo, liked
 343
 344                 // Unhandled from Misskey
 345                 // sharedInbox, isCat
 346
 347                 // Unhandled from Kroeg
 348                 // kroeg:blocks, updated
 349
 350                 // When the photo is too large, try to shorten it by removing parts
 351                 if (strlen($apcontact['photo']) > 255) {
 352                         $parts = parse_url($apcontact['photo']);
 353                         unset($parts['fragment']);
 354                         $apcontact['photo'] = Network::unparseURL($parts);
 355
 356                         if (strlen($apcontact['photo']) > 255) {
 357                                 unset($parts['query']);
 358                                 $apcontact['photo'] = Network::unparseURL($parts);
 359                         }
 360
 361                         if (strlen($apcontact['photo']) > 255) {
 362                                 $apcontact['photo'] = substr($apcontact['photo'], 0, 255);
 363                         }
 364                 }
 365
 366                 if (!$webfinger && !empty($apcontact['addr'])) {
 367                         $data = self::fetchWebfingerData($apcontact['addr']);
 368                         if (!empty($data)) {
 369                                 $apcontact['baseurl'] = $data['baseurl'];
 370
 371                                 if (empty($apcontact['alias']) && !empty($data['alias'])) {
 372                                         $apcontact['alias'] = $data['alias'];
 373                                 }
 374                                 if (!empty($data['subscribe'])) {
 375                                         $apcontact['subscribe'] = $data['subscribe'];
 376                                 }
 377                         } else {
 378                                 $apcontact['addr'] = null;
 379                         }
 380                 }
 381
 382                 if (empty($apcontact['baseurl'])) {
 383                         $apcontact['baseurl'] = null;
 384                 }
 385
 386                 if (empty($apcontact['subscribe'])) {
 387                         $apcontact['subscribe'] = null;
 388                 }
 389
 390                 if (!empty($apcontact['baseurl']) && empty($fetched_contact['gsid'])) {
 391                         $apcontact['gsid'] = GServer::getID($apcontact['baseurl']);
 392                 } elseif (!empty($fetched_contact['gsid'])) {
 393                         $apcontact['gsid'] = $fetched_contact['gsid'];
 394                 } else {
 395                         $apcontact['gsid'] = null;
 396                 }
 397
 398                 if ($apcontact['url'] == $apcontact['alias']) {
 399                         $apcontact['alias'] = null;
 400                 }
 401
 402                 if (empty($apcontact['uuid'])) {
 403                         $apcontact['uri-id'] = ItemURI::getIdByURI($apcontact['url']);
 404                 } else {
 405                         $apcontact['uri-id'] = ItemURI::insert(['uri' => $apcontact['url'], 'guid' => $apcontact['uuid']]);
 406                 }
 407
 408                 $apcontact['updated'] = DateTimeFormat::utcNow();
 409
 410                 // We delete the old entry when the URL is changed
 411                 if ($url != $apcontact['url']) {
 412                         Logger::info('Delete changed profile url', ['old' => $url, 'new' => $apcontact['url']]);
 413                         DBA::delete('apcontact', ['url' => $url]);
 414                 }
 415
 416                 // Limit the length on incoming fields
 417                 $apcontact = DBStructure::getFieldsForTable('apcontact', $apcontact);
 418
 419                 if (DBA::exists('apcontact', ['url' => $apcontact['url']])) {
 420                         DBA::update('apcontact', $apcontact, ['url' => $apcontact['url']]);
 421                 } else {
 422                         DBA::replace('apcontact', $apcontact);
 423                 }
 424
 425                 Logger::info('Updated profile', ['url' => $url]);
 426
 427                 return DBA::selectFirst('apcontact', [], ['url' => $apcontact['url']]) ?: [];
 428         }
 429
 430         /**
 431          * Mark the given AP Contact as "to archive"
 432          *
 433          * @param array $apcontact
 434          * @return void
 435          */
 436         public static function markForArchival(array $apcontact)
 437         {
 438                 if (!empty($apcontact['inbox'])) {
 439                         Logger::info('Set inbox status to failure', ['inbox' => $apcontact['inbox']]);
 440                         HTTPSignature::setInboxStatus($apcontact['inbox'], false);
 441                 }
 442
 443                 if (!empty($apcontact['sharedinbox'])) {
 444                         // Check if there are any available inboxes
 445                         $available = DBA::exists('apcontact', ["`sharedinbox` = ? AnD `inbox` IN (SELECT `url` FROM `inbox-status` WHERE `success` > `failure`)",
 446                                 $apcontact['sharedinbox']]);
 447                         if (!$available) {
 448                                 // If all known personal inboxes are failing then set their shared inbox to failure as well
 449                                 Logger::info('Set shared inbox status to failure', ['sharedinbox' => $apcontact['sharedinbox']]);
 450                                 HTTPSignature::setInboxStatus($apcontact['sharedinbox'], false, true);
 451                         }
 452                 }
 453         }
 454
 455         /**
 456          * Unmark the given AP Contact as "to archive"
 457          *
 458          * @param array $apcontact
 459          * @return void
 460          */
 461         public static function unmarkForArchival(array $apcontact)
 462         {
 463                 if (!empty($apcontact['inbox'])) {
 464                         Logger::info('Set inbox status to success', ['inbox' => $apcontact['inbox']]);
 465                         HTTPSignature::setInboxStatus($apcontact['inbox'], true);
 466                 }
 467                 if (!empty($apcontact['sharedinbox'])) {
 468                         Logger::info('Set shared inbox status to success', ['sharedinbox' => $apcontact['sharedinbox']]);
 469                         HTTPSignature::setInboxStatus($apcontact['sharedinbox'], true, true);
 470                 }
 471         }
 472
 473         /**
 474          * Unarchive inboxes
 475          *
 476          * @param string  $url    inbox url
 477          * @param boolean $shared Shared Inbox
 478          */
 479         private static function unarchiveInbox($url, $shared)
 480         {
 481                 if (empty($url)) {
 482                         return;
 483                 }
 484
 485                 HTTPSignature::setInboxStatus($url, true, $shared);
 486         }
 487 }