src/Model/GServer.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/GServer.php
   5  * @brief This file includes the GServer class to handle with servers
   6  */
   7 namespace Friendica\Model;
   8
   9 use DOMDocument;
  10 use DOMXPath;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\Protocol;
  13 use Friendica\Database\DBA;
  14 use Friendica\Module\Register;
  15 use Friendica\Util\Network;
  16 use Friendica\Util\DateTimeFormat;
  17 use Friendica\Util\Strings;
  18 use Friendica\Util\XML;
  19 use Friendica\Core\Logger;
  20
  21 /*
  22 use Exception;
  23 use Friendica\Core\System;
  24 use Friendica\Core\Worker;
  25 use Friendica\Network\Probe;
  26 use Friendica\Protocol\PortableContact;
  27 */
  28 /**
  29  * @brief This class handles GServer related functions
  30  */
  31 class GServer
  32 {
  33         /**
  34          * Detect server type
  35          *
  36          * @param string  $url   Server url
  37          * @param boolean $force Force update
  38          *
  39          * @return boolean 'true' if server could be detected
  40          */
  41         public static function detect($url, $force = false)
  42         {
  43                 /// @Todo:
  44                 // - Update Check
  45                 // - poco
  46                 // - Pleroma version number
  47
  48 //              $gserver = DBA::selectFirst('gserver', [], ['nurl' => Strings::normaliseLink($url)]);
  49                 $serverdata = [];
  50
  51                 // When a nodeinfo is present, we don't need to dig further
  52                 $xrd_timeout = Config::get('system', 'xrd_timeout');
  53                 $curlResult = Network::curl($url . '/.well-known/nodeinfo', false, ['timeout' => $xrd_timeout]);
  54                 if ($curlResult->isTimeout()) {
  55                         DBA::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($url)]);
  56                         return false;
  57                 }
  58
  59                 $nodeinfo = self::fetchNodeinfo($url, $curlResult);
  60
  61                 if (empty($nodeinfo) || ($nodeinfo['network'] == Protocol::DFRN)) {
  62                         // Fetch the landing page, possibly it reveals some data
  63                         $curlResult = Network::curl($url, false, ['timeout' => $xrd_timeout]);
  64                         if ($curlResult->isSuccess()) {
  65                                 $serverdata = self::analyseRootHeader($curlResult, $serverdata);
  66                                 $serverdata = self::analyseRootBody($curlResult, $serverdata);
  67                         }
  68
  69                         if (!$curlResult->isSuccess() || empty($curlResult->getBody())) {
  70                                 DBA::update('gserver', ['last_failure' => DateTimeFormat::utcNow()], ['nurl' => Strings::normaliseLink($url)]);
  71                                 return false;
  72                         }
  73
  74                         if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::DFRN)) {
  75                                 $serverdata = self::detectFriendica($url, $serverdata);
  76                         }
  77
  78                         if (empty($serverdata['network']) || ($serverdata['network'] == Protocol::ACTIVITYPUB)) {
  79                                 $serverdata = self::detectMastodonAlikes($url, $serverdata);
  80                         }
  81
  82                         // the "siteinfo.json" is some specific endpoint of Hubzilla and Red
  83                         if (empty($serverdata['network']) || (($serverdata['network'] == Protocol::DIASPORA) && ($serverdata['platform'] != 'diaspora'))) {
  84                                 $serverdata = self::fetchSiteinfo($url, $serverdata);
  85                         }
  86
  87                         if (empty($serverdata['network'])) {
  88                                 $serverdata = self::detectNextcloud($url, $serverdata);
  89                         }
  90
  91                         if (empty($serverdata['network'])) {
  92                                 $serverdata = self::detectGNUSocial($url, $serverdata);
  93                         }
  94                 } else {
  95                         $serverdata = $nodeinfo;
  96                 }
  97
  98                 // We can't detect the network type. Possibly it is some system that we don't know yet
  99                 if (empty($serverdata['network'])) {
 100                         $serverdata['network'] = Protocol::PHANTOM;
 101                 }
 102
 103                 $serverdata['url'] = $url;
 104                 $serverdata['nurl'] = Strings::normaliseLink($url);
 105
 106                 $fields = array_keys($serverdata);
 107                 $old_data = DBA::selectFirst('gserver', $fields, ['nurl' => Strings::normaliseLink($url)]);
 108                 if (!DBA::isResult($old_data)) {
 109 die('Möööp');
 110                         $serverdata['created'] = DateTimeFormat::utcNow();
 111                         DBA::insert('gserver', $serverdata);
 112                 } else {
 113                         $serverdata['last_contact'] = DateTimeFormat::utcNow();
 114                         DBA::update('gserver', $serverdata, ['nurl' => $serverdata['nurl']], $old_data);
 115                 }
 116
 117                 return $serverdata;
 118         }
 119
 120         /**
 121          * @brief Detect server type by using the nodeinfo data
 122          *
 123          * @param string $url address of the server
 124          * @return array Server data
 125          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 126          */
 127         private static function fetchNodeinfo($url, $curlResult)
 128         {
 129                 $nodeinfo = json_decode($curlResult->getBody(), true);
 130
 131                 if (!is_array($nodeinfo) || !isset($nodeinfo['links'])) {
 132                         return [];
 133                 }
 134
 135                 $nodeinfo1_url = '';
 136                 $nodeinfo2_url = '';
 137
 138                 foreach ($nodeinfo['links'] as $link) {
 139                         if (!is_array($link) || empty($link['rel']) || empty($link['href'])) {
 140                                 Logger::info('Invalid nodeinfo format', ['url' => $url]);
 141                                 continue;
 142                         }
 143                         if ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/1.0') {
 144                                 $nodeinfo1_url = $link['href'];
 145                         } elseif ($link['rel'] == 'http://nodeinfo.diaspora.software/ns/schema/2.0') {
 146                                 $nodeinfo2_url = $link['href'];
 147                         }
 148                 }
 149
 150                 if ($nodeinfo1_url . $nodeinfo2_url == '') {
 151                         return [];
 152                 }
 153
 154                 $server = [];
 155
 156                 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
 157                 if (!empty($nodeinfo2_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo2_url, PHP_URL_HOST))) {
 158                         $server = self::parseNodeinfo2($nodeinfo2_url);
 159                 }
 160
 161                 // When the nodeinfo url isn't on the same host, then there is obviously something wrong
 162                 if (empty($server) && !empty($nodeinfo1_url) && (parse_url($url, PHP_URL_HOST) == parse_url($nodeinfo1_url, PHP_URL_HOST))) {
 163                         $server = self::parseNodeinfo1($nodeinfo1_url);
 164                 }
 165
 166                 return $server;
 167         }
 168
 169         /**
 170          * @brief Parses Nodeinfo 1
 171          *
 172          * @param string $nodeinfo_url address of the nodeinfo path
 173          * @return array Server data
 174          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 175          */
 176         private static function parseNodeinfo1($nodeinfo_url)
 177         {
 178                 $curlResult = Network::curl($nodeinfo_url);
 179
 180                 if (!$curlResult->isSuccess()) {
 181                         return false;
 182                 }
 183
 184                 $nodeinfo = json_decode($curlResult->getBody(), true);
 185
 186                 if (!is_array($nodeinfo)) {
 187                         return false;
 188                 }
 189
 190                 $server = [];
 191
 192                 $server['register_policy'] = Register::CLOSED;
 193
 194                 if (!empty($nodeinfo['openRegistrations'])) {
 195                         $server['register_policy'] = Register::OPEN;
 196                 }
 197
 198                 if (is_array($nodeinfo['software'])) {
 199                         if (isset($nodeinfo['software']['name'])) {
 200                                 $server['platform'] = $nodeinfo['software']['name'];
 201                         }
 202
 203                         if (isset($nodeinfo['software']['version'])) {
 204                                 $server['version'] = $nodeinfo['software']['version'];
 205                                 // Version numbers on Nodeinfo are presented with additional info, e.g.:
 206                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 207                                 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
 208                         }
 209                 }
 210
 211                 if (isset($nodeinfo['metadata']['nodeName'])) {
 212                         $server['site_name'] = $nodeinfo['metadata']['nodeName'];
 213                 }
 214
 215                 if (!empty($nodeinfo['usage']['users']['total'])) {
 216                         $server['registered-users'] = $nodeinfo['usage']['users']['total'];
 217                 }
 218
 219                 if (!empty($nodeinfo['protocols']['inbound']) && is_array($nodeinfo['protocols']['inbound'])) {
 220                         $protocols = [];
 221                         foreach ($nodeinfo['protocols']['inbound'] as $protocol) {
 222                                 $protocols[$protocol] = true;
 223                         }
 224
 225                         if (!empty($protocols['friendica'])) {
 226                                 $server['network'] = Protocol::DFRN;
 227                         } elseif (!empty($protocols['activitypub'])) {
 228                                 $server['network'] = Protocol::ACTIVITYPUB;
 229                         } elseif (!empty($protocols['diaspora'])) {
 230                                 $server['network'] = Protocol::DIASPORA;
 231                         } elseif (!empty($protocols['ostatus'])) {
 232                                 $server['network'] = Protocol::OSTATUS;
 233                         } elseif (!empty($protocols['gnusocial'])) {
 234                                 $server['network'] = Protocol::OSTATUS;
 235                         } else {
 236                                 print_r($protocols);
 237                                 die('Protocol 1');
 238                         }
 239                 }
 240
 241                 if (!$server) {
 242                         return false;
 243                 }
 244
 245                 return $server;
 246         }
 247
 248         /**
 249          * @brief Parses Nodeinfo 2
 250          *
 251          * @param string $nodeinfo_url address of the nodeinfo path
 252          * @return array Server data
 253          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 254          */
 255         private static function parseNodeinfo2($nodeinfo_url)
 256         {
 257                 $curlResult = Network::curl($nodeinfo_url);
 258                 if (!$curlResult->isSuccess()) {
 259                         return false;
 260                 }
 261
 262                 $nodeinfo = json_decode($curlResult->getBody(), true);
 263
 264                 if (!is_array($nodeinfo)) {
 265                         return false;
 266                 }
 267
 268                 $server = [];
 269
 270                 $server['register_policy'] = Register::CLOSED;
 271
 272                 if (!empty($nodeinfo['openRegistrations'])) {
 273                         $server['register_policy'] = Register::OPEN;
 274                 }
 275
 276                 if (is_array($nodeinfo['software'])) {
 277                         if (isset($nodeinfo['software']['name'])) {
 278                                 $server['platform'] = $nodeinfo['software']['name'];
 279                         }
 280
 281                         if (isset($nodeinfo['software']['version'])) {
 282                                 $server['version'] = $nodeinfo['software']['version'];
 283                                 // Version numbers on Nodeinfo are presented with additional info, e.g.:
 284                                 // 0.6.3.0-p1702cc1c, 0.6.99.0-p1b9ab160 or 3.4.3-2-1191.
 285                                 $server['version'] = preg_replace('=(.+)-(.{4,})=ism', '$1', $server['version']);
 286                         }
 287                 }
 288
 289                 if (isset($nodeinfo['metadata']['nodeName'])) {
 290                         $server['site_name'] = $nodeinfo['metadata']['nodeName'];
 291                 }
 292
 293                 if (!empty($nodeinfo['usage']['users']['total'])) {
 294                         $server['registered-users'] = $nodeinfo['usage']['users']['total'];
 295                 }
 296
 297                 if (!empty($nodeinfo['protocols'])) {
 298                         $protocols = [];
 299                         foreach ($nodeinfo['protocols'] as $protocol) {
 300                                 $protocols[$protocol] = true;
 301                         }
 302
 303                         if (!empty($protocols['friendica'])) {
 304                                 $server['network'] = Protocol::DFRN;
 305                         } elseif (!empty($protocols['activitypub'])) {
 306                                 $server['network'] = Protocol::ACTIVITYPUB;
 307                         } elseif (!empty($protocols['diaspora'])) {
 308                                 $server['network'] = Protocol::DIASPORA;
 309                         } elseif (!empty($protocols['ostatus'])) {
 310                                 $server['network'] = Protocol::OSTATUS;
 311                         } elseif (!empty($protocols['gnusocial'])) {
 312                                 $server['network'] = Protocol::OSTATUS;
 313                         } else {
 314                                 print_r($protocols);
 315                                 die('Protocol 2');
 316                         }
 317                 }
 318
 319                 if (empty($server)) {
 320                         return false;
 321                 }
 322
 323                 return $server;
 324         }
 325
 326         private static function fetchSiteinfo($url, $serverdata)
 327         {
 328                 $curlResult = Network::curl($url . '/siteinfo.json');
 329                 if (!$curlResult->isSuccess()) {
 330                         return $serverdata;
 331                 }
 332
 333                 $data = json_decode($curlResult->getBody(), true);
 334                 if (empty($data)) {
 335                         return $serverdata;
 336                 }
 337
 338                 if (isset($data['url'])) {
 339                         $serverdata['platform'] = $data['platform'];
 340                         $serverdata['version'] = $data['version'];
 341                 }
 342
 343                 if (!empty($data['plugins'])) {
 344                         if (in_array('pubcrawl', $data['plugins'])) {
 345                                 $serverdata['network'] = Protocol::ACTIVITYPUB;
 346                         } elseif (in_array('diaspora', $data['plugins'])) {
 347                                 $serverdata['network'] = Protocol::DIASPORA;
 348                         } elseif (in_array('gnusoc', $data['plugins'])) {
 349                                 $serverdata['network'] = Protocol::OSTATUS;
 350                         } else {
 351                                 $serverdata['network'] = Protocol::ZOT;
 352                         }
 353                 }
 354
 355                 if (!empty($data['site_name'])) {
 356                         $serverdata['site_name'] = $data['site_name'];
 357                 }
 358
 359                 if (!empty($data['channels_total'])) {
 360                         $serverdata['registered-users'] = $data['channels_total'];
 361                 }
 362
 363                 if (!empty($data['register_policy'])) {
 364                         switch ($data['register_policy']) {
 365                                 case "REGISTER_OPEN":
 366                                         $serverdata['register_policy'] = Register::OPEN;
 367                                         break;
 368
 369                                 case "REGISTER_APPROVE":
 370                                         $serverdata['register_policy'] = Register::APPROVE;
 371                                         break;
 372
 373                                 case "REGISTER_CLOSED":
 374                                 default:
 375                                         $serverdata['register_policy'] = Register::CLOSED;
 376                                         break;
 377                         }
 378                 }
 379
 380                 return $serverdata;
 381         }
 382
 383         private static function detectNextcloud($url, $serverdata)
 384         {
 385                 $curlResult = Network::curl($url . '/status.php');
 386
 387                 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
 388                         return $serverdata;
 389                 }
 390
 391                 $data = json_decode($curlResult->getBody(), true);
 392                 if (empty($data)) {
 393                         return $serverdata;
 394                 }
 395
 396                 if (!empty($data['version'])) {
 397                         $serverdata['platform'] = 'nextcloud';
 398                         $serverdata['version'] = $data['version'];
 399                         $serverdata['network'] = Protocol::ACTIVITYPUB;
 400                 }
 401
 402                 return $serverdata;
 403         }
 404
 405         private static function detectMastodonAlikes($url, $serverdata)
 406         {
 407                 $curlResult = Network::curl($url . '/api/v1/instance');
 408
 409                 if (!$curlResult->isSuccess() || ($curlResult->getBody() == '')) {
 410                         return $serverdata;
 411                 }
 412
 413                 $data = json_decode($curlResult->getBody(), true);
 414                 if (empty($data)) {
 415                         return $serverdata;
 416                 }
 417
 418                 if (isset($data['version'])) {
 419                         $serverdata['platform'] = 'mastodon';
 420                         $serverdata['version'] = defaults($data, 'version', '');
 421                         if (!empty($data['title'])) {
 422                                 $serverdata['site_name'] = $data['title'];
 423                         }
 424                         if (!empty($data['description'])) {
 425                                 $serverdata['info'] = trim($data['description']);
 426                         }
 427                         $serverdata['network'] = Protocol::ACTIVITYPUB;
 428                 }
 429
 430                 if (!empty($data['stats']['user_count'])) {
 431                         $serverdata['registered-users'] = $data['stats']['user_count'];
 432                 }
 433
 434                 if (strstr($serverdata['version'], 'Pleroma')) {
 435                         $serverdata['platform'] = 'pleroma';
 436                         $serverdata['version'] = trim(str_replace('Pleroma', '', $serverdata['version'])); // 2.7.2 (compatible; Pleroma 1.0.0-1225-gf31ad554-develop)
 437                 }
 438
 439                 if (strstr($serverdata['version'], 'Pixelfed')) {
 440                         print_r($serverdata);
 441                         die();
 442 //                      $serverdata['platform'] = 'pixelfed';
 443 //                      $serverdata['version'] = trim(str_replace('Pixelfed', '', $serverdata['version'])); // 2.7.2 (compatible; Pixelfed 0.10.5)
 444                 }
 445
 446                 return $serverdata;
 447         }
 448
 449         private static function detectGNUSocial($url, $serverdata)
 450         {
 451                 $curlResult = Network::curl($url . '/api/statusnet/version.json');
 452
 453                 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
 454                         ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
 455                         $serverdata['platform'] = 'StatusNet';
 456                         // Remove junk that some GNU Social servers return
 457                         $serverdata['version'] = str_replace(chr(239).chr(187).chr(191), '', $curlResult->getBody());
 458                         $serverdata['version'] = trim($serverdata['version'], '"');
 459                         $serverdata['network'] = Protocol::OSTATUS;
 460                 }
 461
 462                 // Test for GNU Social
 463                 $curlResult = Network::curl($url . '/api/gnusocial/version.json');
 464
 465                 if ($curlResult->isSuccess() && ($curlResult->getBody() != '{"error":"not implemented"}') &&
 466                         ($curlResult->getBody() != '') && (strlen($curlResult->getBody()) < 30)) {
 467                         $serverdata['platform'] = 'GNU Social';
 468                         // Remove junk that some GNU Social servers return
 469                         $serverdata['version'] = str_replace(chr(239) . chr(187) . chr(191), '', $curlResult->getBody());
 470                         $serverdata['version'] = trim($serverdata['version'], '"');
 471                         $serverdata['network'] = Protocol::OSTATUS;
 472                 }
 473
 474                 return $serverdata;
 475         }
 476
 477         private static function detectFriendica($url, $serverdata)
 478         {
 479                 $curlResult = Network::curl($url . '/friendica/json');
 480                 if (!$curlResult->isSuccess()) {
 481                         $curlResult = Network::curl($url . '/friendika/json');
 482                 }
 483
 484                 if (!$curlResult->isSuccess()) {
 485                         return $serverdata;
 486                 }
 487
 488                 $data = json_decode($curlResult->getBody(), true);
 489                 if (empty($data) || empty($data['version'])) {
 490                         return $serverdata;
 491                 }
 492
 493                 $serverdata['network'] = Protocol::DFRN;
 494                 $serverdata['version'] = $data['version'];
 495
 496                 if (!empty($data['no_scrape_url'])) {
 497                         $serverdata['noscrape'] = $data['no_scrape_url'];
 498                 }
 499
 500                 if (!empty($data['site_name'])) {
 501                         $serverdata['site_name'] = $data['site_name'];
 502                 }
 503
 504                 if (!empty($data['info'])) {
 505                         $serverdata['info'] = trim($data['info']);
 506                 }
 507
 508                 $register_policy = defaults($data, 'register_policy', 'REGISTER_CLOSED');
 509                 switch ($register_policy) {
 510                         case 'REGISTER_OPEN':
 511                                 $serverdata['register_policy'] = Register::OPEN;
 512                                 break;
 513
 514                         case 'REGISTER_APPROVE':
 515                                 $serverdata['register_policy'] = Register::APPROVE;
 516                                 break;
 517
 518                         case 'REGISTER_CLOSED':
 519                         case 'REGISTER_INVITATION':
 520                                 $serverdata['register_policy'] = Register::CLOSED;
 521                                 break;
 522                         default:
 523                                 Logger::info('Register policy is invalid', ['policy' => $register_policy, 'server' => $url]);
 524                                 $serverdata['register_policy'] = Register::CLOSED;
 525                                 break;
 526                 }
 527
 528                 $serverdata['platform'] = defaults($data, 'platform', '');
 529
 530                 return $serverdata;
 531         }
 532
 533         private static function analyseRootBody($curlResult, $serverdata)
 534         {
 535                 $doc = new DOMDocument();
 536                 @$doc->loadHTML($curlResult->getBody());
 537                 $xpath = new DOMXPath($doc);
 538
 539                 $title = trim(XML::getFirstNodeValue($xpath, '//head/title/text()'));
 540                 if (!empty($title)) {
 541                         $serverdata['site_name'] = $title;
 542                 }
 543
 544                 $list = $xpath->query('//meta[@name]');
 545
 546                 foreach ($list as $node) {
 547                         $attr = [];
 548                         if ($node->attributes->length) {
 549                                 foreach ($node->attributes as $attribute) {
 550                                         $attribute->value = trim($attribute->value);
 551                                         if (empty($attribute->value)) {
 552                                                 continue;
 553                                         }
 554
 555                                         $attr[$attribute->name] = $attribute->value;
 556                                 }
 557                         }
 558 //print_r($attr);
 559                         if ($attr['name'] == 'description') {
 560                                 $serverdata['info'] = $attr['content'];
 561                         }
 562
 563                         if ($attr['name'] == 'application-name') {
 564                                 $serverdata['platform'] = $attr['content'];
 565                                 if (in_array($attr['content'], ['Misskey', 'Write.as'])) {
 566                                         $serverdata['network'] = Protocol::ACTIVITYPUB;
 567                                 }
 568                         }
 569 //
 570                         if (($attr['name'] == 'generator') && in_array($attr['content'], ['Write.as'])) {
 571 die('as');
 572 //                              $serverdata['platform'] = $attr['content'];
 573 //                              $serverdata['network'] = Protocol::ACTIVITYPUB;
 574                         } elseif ($attr['name'] == 'generator') {
 575                                 $serverdata['platform'] = $attr['content'];
 576
 577                                 $version_part = explode(' ', $attr['content']);
 578
 579                                 if (count($version_part) == 3) {
 580                                         if (($version_part[0] == 'Red') && ($version_part[1] == 'Matrix')) {
 581 //                                              $serverdata['platform'] = $version_part[0] . ' ' . $version_part[1];
 582 //                                              $serverdata['version'] = $version_part[2];
 583 //                                              $serverdata['network'] = Protocol::DIASPORA;
 584                                         }
 585                                 } elseif (count($version_part) == 2) {
 586                                         if (in_array($version_part[0], ['WordPress'])) {
 587                                                 $serverdata['platform'] = $version_part[0];
 588                                                 $serverdata['version'] = $version_part[1];
 589                                                 $serverdata['network'] = Protocol::ACTIVITYPUB;
 590                                         }
 591                                         if (in_array($version_part[0], ['Friendika', 'Friendica'])) {
 592                                                 $serverdata['platform'] = $version_part[0];
 593                                                 $serverdata['version'] = $version_part[1];
 594                                                 $serverdata['network'] = Protocol::DFRN;
 595                                         }
 596                                 }
 597                         }
 598                 }
 599
 600                 $list = $xpath->query('//meta[@property]');
 601
 602                 foreach ($list as $node) {
 603                         $attr = [];
 604                         if ($node->attributes->length) {
 605                                 foreach ($node->attributes as $attribute) {
 606                                         $attribute->value = trim($attribute->value);
 607                                         if (empty($attribute->value)) {
 608                                                 continue;
 609                                         }
 610
 611                                         $attr[$attribute->name] = $attribute->value;
 612                                 }
 613                         }
 614 //print_r($attr);
 615
 616                         if ($attr['property'] == 'og:site_name') {
 617                                 $serverdata['site_name'] = $attr['content'];
 618                         }
 619
 620                         if ($attr['property'] == 'og:description') {
 621                                 $serverdata['info'] = $attr['content'];
 622                         }
 623
 624 //                      if (($attr['property'] == 'og:title') && in_array($attr['content'], ['pixelfed', 'Socialhome'])) {
 625 //                      if (($attr['property'] == 'og:title') && in_array($attr['content'], ['Nextcloud'])) {
 626 //                              $serverdata['platform'] = $attr['content'];
 627 //                              $serverdata['network'] = Protocol::ACTIVITYPUB;
 628 //                      }
 629
 630                         if (($attr['property'] == 'og:platform') && in_array($attr['content'], ['PeerTube'])) {
 631 die('Peertube');
 632 //                              $serverdata['platform'] = $attr['content'];
 633 //                              $serverdata['network'] = Protocol::ACTIVITYPUB;
 634                         }
 635
 636                         if (($attr['property'] == 'generator') && in_array($attr['content'], ['hubzilla'])) {
 637                                 $serverdata['platform'] = $attr['content'];
 638                                 $serverdata['network'] = Protocol::DIASPORA;
 639                         }
 640                 }
 641
 642                 return $serverdata;
 643         }
 644
 645         private static function analyseRootHeader($curlResult, $serverdata)
 646         {
 647                 if ($curlResult->getHeader('server') == 'Mastodon') {
 648                         $serverdata['platform'] = 'mastodon';
 649                         $serverdata['network'] = $network = Protocol::ACTIVITYPUB;
 650                 } elseif ($curlResult->inHeader('x-diaspora-version')) {
 651                         $serverdata['platform'] = 'diaspora';
 652                         $serverdata['network'] = $network = Protocol::DIASPORA;
 653                         $serverdata['version'] = $curlResult->getHeader('x-diaspora-version');
 654
 655                 } elseif ($curlResult->inHeader('x-friendica-version')) {
 656                         $serverdata['platform'] = 'friendica';
 657                         $serverdata['network'] = $network = Protocol::DFRN;
 658                         $serverdata['version'] = $curlResult->getHeader('x-friendica-version');
 659
 660                 } else {
 661 //print_r($curlResult->getHeaderArray());
 662                 }
 663                 return $serverdata;
 664         }
 665 }