src/Network/Probe.php

   1 <?php
   2 /**
   3  * @file src/Network/Probe.php
   4  */
   5 namespace Friendica\Network;
   6
   7 /**
   8  * @file src/Network/Probe.php
   9  * @brief Functions for probing URL
  10  */
  11
  12 use Friendica\App;
  13 use Friendica\Core\System;
  14 use Friendica\Core\Cache;
  15 use Friendica\Core\Config;
  16 use Friendica\Database\DBM;
  17 use Friendica\Model\Profile;
  18 use Friendica\Protocol\Email;
  19 use Friendica\Protocol\Feed;
  20 use Friendica\Util\Crypto;
  21 use Friendica\Util\Network;
  22 use Friendica\Util\XML;
  23 use Friendica\Util\DateTimeFormat;
  24 use dba;
  25 use DOMXPath;
  26 use DOMDocument;
  27
  28 require_once 'include/dba.php';
  29
  30 /**
  31  * @brief This class contain functions for probing URL
  32  *
  33  */
  34 class Probe
  35 {
  36         private static $baseurl;
  37
  38         /**
  39          * @brief Rearrange the array so that it always has the same order
  40          *
  41          * @param array $data Unordered data
  42          *
  43          * @return array Ordered data
  44          */
  45         private static function rearrangeData($data)
  46         {
  47                 $fields = ["name", "nick", "guid", "url", "addr", "alias",
  48                                 "photo", "community", "keywords", "location", "about",
  49                                 "batch", "notify", "poll", "request", "confirm", "poco",
  50                                 "priority", "network", "pubkey", "baseurl"];
  51
  52                 $newdata = [];
  53                 foreach ($fields as $field) {
  54                         if (isset($data[$field])) {
  55                                 $newdata[$field] = $data[$field];
  56                         } else {
  57                                 $newdata[$field] = "";
  58                         }
  59                 }
  60
  61                 // We don't use the "priority" field anymore and replace it with a dummy.
  62                 $newdata["priority"] = 0;
  63
  64                 return $newdata;
  65         }
  66
  67         /**
  68          * @brief Check if the hostname belongs to the own server
  69          *
  70          * @param string $host The hostname that is to be checked
  71          *
  72          * @return bool Does the testes hostname belongs to the own server?
  73          */
  74         private static function ownHost($host)
  75         {
  76                 $own_host = get_app()->get_hostname();
  77
  78                 $parts = parse_url($host);
  79
  80                 if (!isset($parts['scheme'])) {
  81                         $parts = parse_url('http://'.$host);
  82                 }
  83
  84                 if (!isset($parts['host'])) {
  85                         return false;
  86                 }
  87                 return $parts['host'] == $own_host;
  88         }
  89
  90         /**
  91          * @brief Probes for webfinger path via "host-meta"
  92          *
  93          * We have to check if the servers in the future still will offer this.
  94          * It seems as if it was dropped from the standard.
  95          *
  96          * @param string $host The host part of an url
  97          *
  98          * @return array with template and type of the webfinger template for JSON or XML
  99          */
 100         private static function hostMeta($host)
 101         {
 102                 // Reset the static variable
 103                 self::$baseurl = '';
 104
 105                 $ssl_url = "https://".$host."/.well-known/host-meta";
 106                 $url = "http://".$host."/.well-known/host-meta";
 107
 108                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
 109                 $redirects = 0;
 110
 111                 logger("Probing for ".$host, LOGGER_DEBUG);
 112                 $xrd = null;
 113
 114                 $ret = Network::curl($ssl_url, false, $redirects, ['timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml']);
 115                 if ($ret['success']) {
 116                         $xml = $ret['body'];
 117                         $xrd = XML::parseString($xml, false);
 118                         $host_url = 'https://'.$host;
 119                 }
 120
 121                 if (!is_object($xrd)) {
 122                         $ret = Network::curl($url, false, $redirects, ['timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml']);
 123                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 124                                 logger("Probing timeout for ".$url, LOGGER_DEBUG);
 125                                 return false;
 126                         }
 127                         $xml = $ret['body'];
 128                         $xrd = XML::parseString($xml, false);
 129                         $host_url = 'http://'.$host;
 130                 }
 131                 if (!is_object($xrd)) {
 132                         logger("No xrd object found for ".$host, LOGGER_DEBUG);
 133                         return [];
 134                 }
 135
 136                 $links = XML::elementToArray($xrd);
 137                 if (!isset($links["xrd"]["link"])) {
 138                         logger("No xrd data found for ".$host, LOGGER_DEBUG);
 139                         return [];
 140                 }
 141
 142                 $lrdd = [];
 143                 // The following webfinger path is defined in RFC 7033 https://tools.ietf.org/html/rfc7033
 144                 // Problem is that Hubzilla currently doesn't provide all data in the JSON webfinger
 145                 // compared to the XML webfinger. So this is commented out by now.
 146                 // $lrdd = array("application/jrd+json" => $host_url.'/.well-known/webfinger?resource={uri}');
 147
 148                 foreach ($links["xrd"]["link"] as $value => $link) {
 149                         if (!empty($link["@attributes"])) {
 150                                 $attributes = $link["@attributes"];
 151                         } elseif ($value == "@attributes") {
 152                                 $attributes = $link;
 153                         } else {
 154                                 continue;
 155                         }
 156
 157                         if (($attributes["rel"] == "lrdd") && !empty($attributes["template"])) {
 158                                 $type = (empty($attributes["type"]) ? '' : $attributes["type"]);
 159
 160                                 $lrdd[$type] = $attributes["template"];
 161                         }
 162                 }
 163
 164                 self::$baseurl = "http://".$host;
 165
 166                 logger("Probing successful for ".$host, LOGGER_DEBUG);
 167
 168                 return $lrdd;
 169         }
 170
 171         /**
 172          * @brief Perform Webfinger lookup and return DFRN data
 173          *
 174          * Given an email style address, perform webfinger lookup and
 175          * return the resulting DFRN profile URL, or if no DFRN profile URL
 176          * is located, returns an OStatus subscription template (prefixed
 177          * with the string 'stat:' to identify it as on OStatus template).
 178          * If this isn't an email style address just return $webbie.
 179          * Return an empty string if email-style addresses but webfinger fails,
 180          * or if the resultant personal XRD doesn't contain a supported
 181          * subscription/friend-request attribute.
 182          *
 183          * amended 7/9/2011 to return an hcard which could save potentially loading
 184          * a lengthy content page to scrape dfrn attributes
 185          *
 186          * @param string $webbie    Address that should be probed
 187          * @param string $hcard_url Link to the hcard - is returned by reference
 188          *
 189          * @return string profile link
 190          */
 191         public static function webfingerDfrn($webbie, &$hcard_url)
 192         {
 193                 $profile_link = '';
 194
 195                 $links = self::lrdd($webbie);
 196                 logger('webfingerDfrn: '.$webbie.':'.print_r($links, true), LOGGER_DATA);
 197                 if (count($links)) {
 198                         foreach ($links as $link) {
 199                                 if ($link['@attributes']['rel'] === NAMESPACE_DFRN) {
 200                                         $profile_link = $link['@attributes']['href'];
 201                                 }
 202                                 if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) && ($profile_link == "")) {
 203                                         $profile_link = 'stat:'.$link['@attributes']['template'];
 204                                 }
 205                                 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard') {
 206                                         $hcard_url = $link['@attributes']['href'];
 207                                 }
 208                         }
 209                 }
 210                 return $profile_link;
 211         }
 212
 213         /**
 214          * @brief Check an URI for LRDD data
 215          *
 216          * this is a replacement for the "lrdd" function.
 217          * It isn't used in this class and has some redundancies in the code.
 218          * When time comes we can check the existing calls for "lrdd" if we can rework them.
 219          *
 220          * @param string $uri Address that should be probed
 221          *
 222          * @return array uri data
 223          */
 224         public static function lrdd($uri)
 225         {
 226                 $lrdd = self::hostMeta($uri);
 227                 $webfinger = null;
 228
 229                 if (is_bool($lrdd)) {
 230                         return [];
 231                 }
 232
 233                 if (!$lrdd) {
 234                         $parts = @parse_url($uri);
 235                         if (!$parts) {
 236                                 return [];
 237                         }
 238
 239                         $host = $parts["host"];
 240                         if (!empty($parts["port"])) {
 241                                 $host .= ':'.$parts["port"];
 242                         }
 243
 244                         $path_parts = explode("/", trim($parts["path"], "/"));
 245
 246                         $nick = array_pop($path_parts);
 247
 248                         do {
 249                                 $lrdd = self::hostMeta($host);
 250                                 $host .= "/".array_shift($path_parts);
 251                         } while (!$lrdd && (sizeof($path_parts) > 0));
 252                 }
 253
 254                 if (!$lrdd) {
 255                         logger("No lrdd data found for ".$uri, LOGGER_DEBUG);
 256                         return [];
 257                 }
 258
 259                 foreach ($lrdd as $type => $template) {
 260                         if ($webfinger) {
 261                                 continue;
 262                         }
 263
 264                         $path = str_replace('{uri}', urlencode($uri), $template);
 265                         $webfinger = self::webfinger($path, $type);
 266
 267                         if (!$webfinger && (strstr($uri, "@"))) {
 268                                 $path = str_replace('{uri}', urlencode("acct:".$uri), $template);
 269                                 $webfinger = self::webfinger($path, $type);
 270                         }
 271
 272                         // Special treatment for Mastodon
 273                         // Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 274                         // But the webfinger for this format fails.
 275                         if (!$webfinger && !empty($nick)) {
 276                                 // Mastodon uses a "@" as prefix for usernames in their url format
 277                                 $nick = ltrim($nick, '@');
 278
 279                                 $addr = $nick."@".$host;
 280
 281                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $template);
 282                                 $webfinger = self::webfinger($path, $type);
 283                         }
 284                 }
 285
 286                 if (!is_array($webfinger["links"])) {
 287                         logger("No webfinger links found for ".$uri, LOGGER_DEBUG);
 288                         return false;
 289                 }
 290
 291                 $data = [];
 292
 293                 foreach ($webfinger["links"] as $link) {
 294                         $data[] = ["@attributes" => $link];
 295                 }
 296
 297                 if (is_array($webfinger["aliases"])) {
 298                         foreach ($webfinger["aliases"] as $alias) {
 299                                 $data[] = ["@attributes" =>
 300                                                         ["rel" => "alias",
 301                                                                 "href" => $alias]];
 302                         }
 303                 }
 304
 305                 return $data;
 306         }
 307
 308         /**
 309          * @brief Fetch information (protocol endpoints and user information) about a given uri
 310          *
 311          * @param string  $uri     Address that should be probed
 312          * @param string  $network Test for this specific network
 313          * @param integer $uid     User ID for the probe (only used for mails)
 314          * @param boolean $cache   Use cached values?
 315          *
 316          * @return array uri data
 317          */
 318         public static function uri($uri, $network = "", $uid = -1, $cache = true)
 319         {
 320                 if ($cache) {
 321                         $result = Cache::get("Probe::uri:".$network.":".$uri);
 322                         if (!is_null($result)) {
 323                                 return $result;
 324                         }
 325                 }
 326
 327                 if ($uid == -1) {
 328                         $uid = local_user();
 329                 }
 330
 331                 $data = self::detect($uri, $network, $uid);
 332
 333                 if (!isset($data["url"])) {
 334                         $data["url"] = $uri;
 335                 }
 336
 337                 if (x($data, "photo")) {
 338                         $data["baseurl"] = Network::getUrlMatch(normalise_link(defaults($data, "baseurl", "")), normalise_link($data["photo"]));
 339                 } else {
 340                         $data["photo"] = System::baseUrl().'/images/person-175.jpg';
 341                 }
 342
 343                 if (empty($data["name"])) {
 344                         if (!empty($data["nick"])) {
 345                                 $data["name"] = $data["nick"];
 346                         }
 347
 348                         if (!x($data, "name")) {
 349                                 $data["name"] = $data["url"];
 350                         }
 351                 }
 352
 353                 if (empty($data["nick"])) {
 354                         $data["nick"] = strtolower($data["name"]);
 355
 356                         if (strpos($data['nick'], ' ')) {
 357                                 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
 358                         }
 359                 }
 360
 361                 if (!empty(self::$baseurl)) {
 362                         $data["baseurl"] = self::$baseurl;
 363                 }
 364
 365                 if (empty($data["network"])) {
 366                         $data["network"] = NETWORK_PHANTOM;
 367                 }
 368
 369                 $data = self::rearrangeData($data);
 370
 371                 // Only store into the cache if the value seems to be valid
 372                 if (!in_array($data['network'], [NETWORK_PHANTOM, NETWORK_MAIL])) {
 373                         Cache::set("Probe::uri:".$network.":".$uri, $data, CACHE_DAY);
 374
 375                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 376                         /// The biggest problem is the avatar picture that could have a reduced image size.
 377                         /// It should only be updated if the existing picture isn't existing anymore.
 378                         /// We only update the contact when it is no probing for a specific network.
 379                         if (($data['network'] != NETWORK_FEED)
 380                                 && ($network == "")
 381                                 && $data["name"]
 382                                 && $data["nick"]
 383                                 && $data["url"]
 384                                 && $data["addr"]
 385                                 && $data["poll"]
 386                         ) {
 387                                 $fields = ['name' => $data['name'],
 388                                                 'nick' => $data['nick'],
 389                                                 'url' => $data['url'],
 390                                                 'addr' => $data['addr'],
 391                                                 'photo' => $data['photo'],
 392                                                 'keywords' => $data['keywords'],
 393                                                 'location' => $data['location'],
 394                                                 'about' => $data['about'],
 395                                                 'notify' => $data['notify'],
 396                                                 'network' => $data['network'],
 397                                                 'server_url' => $data['baseurl']];
 398
 399                                 // This doesn't cover the case when a community isn't a community anymore
 400                                 if (!empty($data['community']) && $data['community']) {
 401                                         $fields['community'] = $data['community'];
 402                                         $fields['contact-type'] = ACCOUNT_TYPE_COMMUNITY;
 403                                 }
 404
 405                                 $fieldnames = [];
 406
 407                                 foreach ($fields as $key => $val) {
 408                                         if (empty($val)) {
 409                                                 unset($fields[$key]);
 410                                         } else {
 411                                                 $fieldnames[] = $key;
 412                                         }
 413                                 }
 414
 415                                 $fields['updated'] = DBM::date();
 416
 417                                 $condition = ['nurl' => normalise_link($data["url"])];
 418
 419                                 $old_fields = dba::selectFirst('gcontact', $fieldnames, $condition);
 420
 421                                 // When the gcontact doesn't exist, the value "true" will trigger an insert.
 422                                 // In difference to the public contacts we want to have every contact
 423                                 // in the world in our global contacts.
 424                                 if (!$old_fields) {
 425                                         $old_fields = true;
 426
 427                                         // These values have to be set only on insert
 428                                         $fields['photo'] = $data['photo'];
 429                                         $fields['created'] = DateTimeFormat::utcNow();
 430                                 }
 431
 432                                 dba::update('gcontact', $fields, $condition, $old_fields);
 433
 434                                 $fields = ['name' => $data['name'],
 435                                                 'nick' => $data['nick'],
 436                                                 'url' => $data['url'],
 437                                                 'addr' => $data['addr'],
 438                                                 'alias' => $data['alias'],
 439                                                 'keywords' => $data['keywords'],
 440                                                 'location' => $data['location'],
 441                                                 'about' => $data['about'],
 442                                                 'batch' => $data['batch'],
 443                                                 'notify' => $data['notify'],
 444                                                 'poll' => $data['poll'],
 445                                                 'request' => $data['request'],
 446                                                 'confirm' => $data['confirm'],
 447                                                 'poco' => $data['poco'],
 448                                                 'network' => $data['network'],
 449                                                 'pubkey' => $data['pubkey'],
 450                                                 'priority' => $data['priority'],
 451                                                 'writable' => true,
 452                                                 'rel' => CONTACT_IS_SHARING];
 453
 454                                 $fieldnames = [];
 455
 456                                 foreach ($fields as $key => $val) {
 457                                         if (empty($val)) {
 458                                                 unset($fields[$key]);
 459                                         } else {
 460                                                 $fieldnames[] = $key;
 461                                         }
 462                                 }
 463
 464                                 $condition = ['nurl' => normalise_link($data["url"]), 'self' => false, 'uid' => 0];
 465
 466                                 // "$old_fields" will return a "false" when the contact doesn't exist.
 467                                 // This won't trigger an insert. This is intended, since we only need
 468                                 // public contacts for everyone we store items from.
 469                                 // We don't need to store every contact on the planet.
 470                                 $old_fields = dba::selectFirst('contact', $fieldnames, $condition);
 471
 472                                 $fields['name-date'] = DateTimeFormat::utcNow();
 473                                 $fields['uri-date'] = DateTimeFormat::utcNow();
 474                                 $fields['success_update'] = DateTimeFormat::utcNow();
 475
 476                                 dba::update('contact', $fields, $condition, $old_fields);
 477                         }
 478                 }
 479
 480                 return $data;
 481         }
 482
 483         /**
 484          * @brief Switch the scheme of an url between http and https
 485          *
 486          * @param string $url URL
 487          *
 488          * @return string switched URL
 489          */
 490         private static function switchScheme($url)
 491         {
 492                 $parts = parse_url($url);
 493
 494                 if (!isset($parts['scheme'])) {
 495                         return $url;
 496                 }
 497
 498                 if ($parts['scheme'] == 'http') {
 499                         $url = str_replace('http://', 'https://', $url);
 500                 } elseif ($parts['scheme'] == 'https') {
 501                         $url = str_replace('https://', 'http://', $url);
 502                 }
 503
 504                 return $url;
 505         }
 506
 507         /**
 508          * @brief Checks if a profile url should be OStatus but only provides partial information
 509          *
 510          * @param array  $webfinger Webfinger data
 511          * @param string $lrdd      Path template for webfinger request
 512          * @param string $type      type
 513          *
 514          * @return array fixed webfinger data
 515          */
 516         private static function fixOStatus($webfinger, $lrdd, $type)
 517         {
 518                 if (empty($webfinger['links']) || empty($webfinger['subject'])) {
 519                         return $webfinger;
 520                 }
 521
 522                 $is_ostatus = false;
 523                 $has_key = false;
 524
 525                 foreach ($webfinger['links'] as $link) {
 526                         if ($link['rel'] == NAMESPACE_OSTATUSSUB) {
 527                                 $is_ostatus = true;
 528                         }
 529                         if ($link['rel'] == 'magic-public-key') {
 530                                 $has_key = true;
 531                         }
 532                 }
 533
 534                 if (!$is_ostatus || $has_key) {
 535                         return $webfinger;
 536                 }
 537
 538                 $url = self::switchScheme($webfinger['subject']);
 539                 $path = str_replace('{uri}', urlencode($url), $lrdd);
 540                 $webfinger2 = self::webfinger($path, $type);
 541
 542                 // Is the new webfinger detectable as OStatus?
 543                 if (self::ostatus($webfinger2, true)) {
 544                         $webfinger = $webfinger2;
 545                 }
 546
 547                 return $webfinger;
 548         }
 549
 550         /**
 551          * @brief Fetch information (protocol endpoints and user information) about a given uri
 552          *
 553          * This function is only called by the "uri" function that adds caching and rearranging of data.
 554          *
 555          * @param string  $uri     Address that should be probed
 556          * @param string  $network Test for this specific network
 557          * @param integer $uid     User ID for the probe (only used for mails)
 558          *
 559          * @return array uri data
 560          */
 561         private static function detect($uri, $network, $uid)
 562         {
 563                 $parts = parse_url($uri);
 564
 565                 if (!empty($parts["scheme"]) && !empty($parts["host"]) && !empty($parts["path"])) {
 566                         $host = $parts["host"];
 567                         if (!empty($parts["port"])) {
 568                                 $host .= ':'.$parts["port"];
 569                         }
 570
 571                         if ($host == 'twitter.com') {
 572                                 return ["network" => NETWORK_TWITTER];
 573                         }
 574                         $lrdd = self::hostMeta($host);
 575
 576                         if (is_bool($lrdd)) {
 577                                 return [];
 578                         }
 579
 580                         $path_parts = explode("/", trim($parts["path"], "/"));
 581
 582                         while (!$lrdd && (sizeof($path_parts) > 1)) {
 583                                 $host .= "/".array_shift($path_parts);
 584                                 $lrdd = self::hostMeta($host);
 585                         }
 586                         if (!$lrdd) {
 587                                 logger('No XRD data was found for '.$uri, LOGGER_DEBUG);
 588                                 return self::feed($uri);
 589                         }
 590                         $nick = array_pop($path_parts);
 591
 592                         // Mastodon uses a "@" as prefix for usernames in their url format
 593                         $nick = ltrim($nick, '@');
 594
 595                         $addr = $nick."@".$host;
 596                 } elseif (strstr($uri, '@')) {
 597                         // If the URI starts with "mailto:" then jump directly to the mail detection
 598                         if (strpos($uri, 'mailto:') !== false) {
 599                                 $uri = str_replace('mailto:', '', $uri);
 600                                 return self::mail($uri, $uid);
 601                         }
 602
 603                         if ($network == NETWORK_MAIL) {
 604                                 return self::mail($uri, $uid);
 605                         }
 606                         // Remove "acct:" from the URI
 607                         $uri = str_replace('acct:', '', $uri);
 608
 609                         $host = substr($uri, strpos($uri, '@') + 1);
 610                         $nick = substr($uri, 0, strpos($uri, '@'));
 611
 612                         if (strpos($uri, '@twitter.com')) {
 613                                 return ["network" => NETWORK_TWITTER];
 614                         }
 615                         $lrdd = self::hostMeta($host);
 616
 617                         if (is_bool($lrdd)) {
 618                                 return [];
 619                         }
 620
 621                         if (!$lrdd) {
 622                                 logger('No XRD data was found for '.$uri, LOGGER_DEBUG);
 623                                 return self::mail($uri, $uid);
 624                         }
 625                         $addr = $uri;
 626                 } else {
 627                         logger("Uri ".$uri." was not detectable", LOGGER_DEBUG);
 628                         return false;
 629                 }
 630
 631                 $webfinger = false;
 632
 633                 /// @todo Do we need the prefix "acct:" or "acct://"?
 634
 635                 foreach ($lrdd as $type => $template) {
 636                         if ($webfinger) {
 637                                 continue;
 638                         }
 639
 640                         // At first try it with the given uri
 641                         $path = str_replace('{uri}', urlencode($uri), $template);
 642                         $webfinger = self::webfinger($path, $type);
 643
 644                         // Fix possible problems with GNU Social probing to wrong scheme
 645                         $webfinger = self::fixOStatus($webfinger, $template, $type);
 646
 647                         // We cannot be sure that the detected address was correct, so we don't use the values
 648                         if ($webfinger && ($uri != $addr)) {
 649                                 $nick = "";
 650                                 $addr = "";
 651                         }
 652
 653                         // Try webfinger with the address (user@domain.tld)
 654                         if (!$webfinger) {
 655                                 $path = str_replace('{uri}', urlencode($addr), $template);
 656                                 $webfinger = self::webfinger($path, $type);
 657                         }
 658
 659                         // Mastodon needs to have it with "acct:"
 660                         if (!$webfinger) {
 661                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $template);
 662                                 $webfinger = self::webfinger($path, $type);
 663                         }
 664                 }
 665
 666                 if (!$webfinger) {
 667                         return self::feed($uri);
 668                 }
 669
 670                 $result = false;
 671
 672                 logger("Probing ".$uri, LOGGER_DEBUG);
 673
 674                 if (in_array($network, ["", NETWORK_DFRN])) {
 675                         $result = self::dfrn($webfinger);
 676                 }
 677                 if ((!$result && ($network == "")) || ($network == NETWORK_DIASPORA)) {
 678                         $result = self::diaspora($webfinger);
 679                 }
 680                 if ((!$result && ($network == "")) || ($network == NETWORK_OSTATUS)) {
 681                         $result = self::ostatus($webfinger);
 682                 }
 683                 if ((!$result && ($network == "")) || ($network == NETWORK_PUMPIO)) {
 684                         $result = self::pumpio($webfinger, $addr);
 685                 }
 686                 if ((!$result && ($network == "")) || ($network == NETWORK_FEED)) {
 687                         $result = self::feed($uri);
 688                 } else {
 689                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 690                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 691                         if ((empty($result["nick"]) || (strstr($result["nick"], " "))) && ($nick != "")) {
 692                                 $result["nick"] = $nick;
 693                         }
 694
 695                         if (empty($result["addr"]) && ($addr != "")) {
 696                                 $result["addr"] = $addr;
 697                         }
 698                 }
 699
 700                 if (empty($result["network"])) {
 701                         $result["network"] = NETWORK_PHANTOM;
 702                 }
 703
 704                 if (empty($result["url"])) {
 705                         $result["url"] = $uri;
 706                 }
 707
 708                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 709
 710                 if (empty($result["baseurl"])) {
 711                         $pos = strpos($result["url"], $host);
 712                         if ($pos) {
 713                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 714                         }
 715                 }
 716                 return $result;
 717         }
 718
 719         /**
 720          * @brief Perform a webfinger request.
 721          *
 722          * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
 723          *
 724          * @param string $url  Address that should be probed
 725          * @param string $type type
 726          *
 727          * @return array webfinger data
 728          */
 729         private static function webfinger($url, $type)
 730         {
 731                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
 732                 $redirects = 0;
 733
 734                 $ret = Network::curl($url, false, $redirects, ['timeout' => $xrd_timeout, 'accept_content' => $type]);
 735                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 736                         return false;
 737                 }
 738                 $data = $ret['body'];
 739
 740                 $webfinger = json_decode($data, true);
 741                 if (is_array($webfinger)) {
 742                         if (!isset($webfinger["links"])) {
 743                                 logger("No json webfinger links for ".$url, LOGGER_DEBUG);
 744                                 return false;
 745                         }
 746                         return $webfinger;
 747                 }
 748
 749                 // If it is not JSON, maybe it is XML
 750                 $xrd = XML::parseString($data, false);
 751                 if (!is_object($xrd)) {
 752                         logger("No webfinger data retrievable for ".$url, LOGGER_DEBUG);
 753                         return false;
 754                 }
 755
 756                 $xrd_arr = XML::elementToArray($xrd);
 757                 if (!isset($xrd_arr["xrd"]["link"])) {
 758                         logger("No XML webfinger links for ".$url, LOGGER_DEBUG);
 759                         return false;
 760                 }
 761
 762                 $webfinger = [];
 763
 764                 if (!empty($xrd_arr["xrd"]["subject"])) {
 765                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 766                 }
 767
 768                 if (!empty($xrd_arr["xrd"]["alias"])) {
 769                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 770                 }
 771
 772                 $webfinger["links"] = [];
 773
 774                 foreach ($xrd_arr["xrd"]["link"] as $value => $data) {
 775                         if (!empty($data["@attributes"])) {
 776                                 $attributes = $data["@attributes"];
 777                         } elseif ($value == "@attributes") {
 778                                 $attributes = $data;
 779                         } else {
 780                                 continue;
 781                         }
 782
 783                         $webfinger["links"][] = $attributes;
 784                 }
 785                 return $webfinger;
 786         }
 787
 788         /**
 789          * @brief Poll the Friendica specific noscrape page.
 790          *
 791          * "noscrape" is a faster alternative to fetch the data from the hcard.
 792          * This functionality was originally created for the directory.
 793          *
 794          * @param string $noscrape_url Link to the noscrape page
 795          * @param array  $data         The already fetched data
 796          *
 797          * @return array noscrape data
 798          */
 799         private static function pollNoscrape($noscrape_url, $data)
 800         {
 801                 $ret = Network::curl($noscrape_url);
 802                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 803                         return false;
 804                 }
 805                 $content = $ret['body'];
 806                 if (!$content) {
 807                         logger("Empty body for ".$noscrape_url, LOGGER_DEBUG);
 808                         return false;
 809                 }
 810
 811                 $json = json_decode($content, true);
 812                 if (!is_array($json)) {
 813                         logger("No json data for ".$noscrape_url, LOGGER_DEBUG);
 814                         return false;
 815                 }
 816
 817                 if (!empty($json["fn"])) {
 818                         $data["name"] = $json["fn"];
 819                 }
 820
 821                 if (!empty($json["addr"])) {
 822                         $data["addr"] = $json["addr"];
 823                 }
 824
 825                 if (!empty($json["nick"])) {
 826                         $data["nick"] = $json["nick"];
 827                 }
 828
 829                 if (!empty($json["guid"])) {
 830                         $data["guid"] = $json["guid"];
 831                 }
 832
 833                 if (!empty($json["comm"])) {
 834                         $data["community"] = $json["comm"];
 835                 }
 836
 837                 if (!empty($json["tags"])) {
 838                         $keywords = implode(" ", $json["tags"]);
 839                         if ($keywords != "") {
 840                                 $data["keywords"] = $keywords;
 841                         }
 842                 }
 843
 844                 $location = Profile::formatLocation($json);
 845                 if ($location) {
 846                         $data["location"] = $location;
 847                 }
 848
 849                 if (!empty($json["about"])) {
 850                         $data["about"] = $json["about"];
 851                 }
 852
 853                 if (!empty($json["key"])) {
 854                         $data["pubkey"] = $json["key"];
 855                 }
 856
 857                 if (!empty($json["photo"])) {
 858                         $data["photo"] = $json["photo"];
 859                 }
 860
 861                 if (!empty($json["dfrn-request"])) {
 862                         $data["request"] = $json["dfrn-request"];
 863                 }
 864
 865                 if (!empty($json["dfrn-confirm"])) {
 866                         $data["confirm"] = $json["dfrn-confirm"];
 867                 }
 868
 869                 if (!empty($json["dfrn-notify"])) {
 870                         $data["notify"] = $json["dfrn-notify"];
 871                 }
 872
 873                 if (!empty($json["dfrn-poll"])) {
 874                         $data["poll"] = $json["dfrn-poll"];
 875                 }
 876
 877                 return $data;
 878         }
 879
 880         /**
 881          * @brief Check for valid DFRN data
 882          *
 883          * @param array $data DFRN data
 884          *
 885          * @return int Number of errors
 886          */
 887         public static function validDfrn($data)
 888         {
 889                 $errors = 0;
 890                 if (!isset($data['key'])) {
 891                         $errors ++;
 892                 }
 893                 if (!isset($data['dfrn-request'])) {
 894                         $errors ++;
 895                 }
 896                 if (!isset($data['dfrn-confirm'])) {
 897                         $errors ++;
 898                 }
 899                 if (!isset($data['dfrn-notify'])) {
 900                         $errors ++;
 901                 }
 902                 if (!isset($data['dfrn-poll'])) {
 903                         $errors ++;
 904                 }
 905                 return $errors;
 906         }
 907
 908         /**
 909          * @brief Fetch data from a DFRN profile page and via "noscrape"
 910          *
 911          * @param string $profile_link Link to the profile page
 912          *
 913          * @return array profile data
 914          */
 915         public static function profile($profile_link)
 916         {
 917                 $data = [];
 918
 919                 logger("Check profile ".$profile_link, LOGGER_DEBUG);
 920
 921                 // Fetch data via noscrape - this is faster
 922                 $noscrape_url = str_replace(["/hcard/", "/profile/"], "/noscrape/", $profile_link);
 923                 $data = self::pollNoscrape($noscrape_url, $data);
 924
 925                 if (!isset($data["notify"])
 926                         || !isset($data["confirm"])
 927                         || !isset($data["request"])
 928                         || !isset($data["poll"])
 929                         || !isset($data["poco"])
 930                         || !isset($data["name"])
 931                         || !isset($data["photo"])
 932                 ) {
 933                         $data = self::pollHcard($profile_link, $data, true);
 934                 }
 935
 936                 $prof_data = [];
 937                 $prof_data["addr"]         = $data["addr"];
 938                 $prof_data["nick"]         = $data["nick"];
 939                 $prof_data["dfrn-request"] = $data["request"];
 940                 $prof_data["dfrn-confirm"] = $data["confirm"];
 941                 $prof_data["dfrn-notify"]  = $data["notify"];
 942                 $prof_data["dfrn-poll"]    = $data["poll"];
 943                 $prof_data["dfrn-poco"]    = $data["poco"];
 944                 $prof_data["photo"]        = $data["photo"];
 945                 $prof_data["fn"]           = $data["name"];
 946                 $prof_data["key"]          = $data["pubkey"];
 947
 948                 logger("Result for profile ".$profile_link.": ".print_r($prof_data, true), LOGGER_DEBUG);
 949
 950                 return $prof_data;
 951         }
 952
 953         /**
 954          * @brief Check for DFRN contact
 955          *
 956          * @param array $webfinger Webfinger data
 957          *
 958          * @return array DFRN data
 959          */
 960         private static function dfrn($webfinger)
 961         {
 962                 $hcard_url = "";
 963                 $data = [];
 964                 foreach ($webfinger["links"] as $link) {
 965                         if (($link["rel"] == NAMESPACE_DFRN) && ($link["href"] != "")) {
 966                                 $data["network"] = NETWORK_DFRN;
 967                         } elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
 968                                 $data["poll"] = $link["href"];
 969                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && ($link["type"] == "text/html") && ($link["href"] != "")) {
 970                                 $data["url"] = $link["href"];
 971                         } elseif (($link["rel"] == "http://microformats.org/profile/hcard") && ($link["href"] != "")) {
 972                                 $hcard_url = $link["href"];
 973                         } elseif (($link["rel"] == NAMESPACE_POCO) && ($link["href"] != "")) {
 974                                 $data["poco"] = $link["href"];
 975                         } elseif (($link["rel"] == "http://webfinger.net/rel/avatar") && ($link["href"] != "")) {
 976                                 $data["photo"] = $link["href"];
 977                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") && ($link["href"] != "")) {
 978                                 $data["baseurl"] = trim($link["href"], '/');
 979                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") && ($link["href"] != "")) {
 980                                 $data["guid"] = $link["href"];
 981                         } elseif (($link["rel"] == "diaspora-public-key") && ($link["href"] != "")) {
 982                                 $data["pubkey"] = base64_decode($link["href"]);
 983
 984                                 //if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
 985                                 if (strstr($data["pubkey"], 'RSA ')) {
 986                                         $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
 987                                 }
 988                         }
 989                 }
 990
 991                 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
 992                         foreach ($webfinger["aliases"] as $alias) {
 993                                 if (normalise_link($alias) != normalise_link($data["url"]) && ! strstr($alias, "@")) {
 994                                         $data["alias"] = $alias;
 995                                 } elseif (substr($alias, 0, 5) == 'acct:') {
 996                                         $data["addr"] = substr($alias, 5);
 997                                 }
 998                         }
 999                 }
1000
1001                 if (!empty($webfinger["subject"]) && (substr($webfinger["subject"], 0, 5) == "acct:")) {
1002                         $data["addr"] = substr($webfinger["subject"], 5);
1003                 }
1004
1005                 if (!isset($data["network"]) || ($hcard_url == "")) {
1006                         return false;
1007                 }
1008
1009                 // Fetch data via noscrape - this is faster
1010                 $noscrape_url = str_replace("/hcard/", "/noscrape/", $hcard_url);
1011                 $data = self::pollNoscrape($noscrape_url, $data);
1012
1013                 if (isset($data["notify"])
1014                         && isset($data["confirm"])
1015                         && isset($data["request"])
1016                         && isset($data["poll"])
1017                         && isset($data["name"])
1018                         && isset($data["photo"])
1019                 ) {
1020                         return $data;
1021                 }
1022
1023                 $data = self::pollHcard($hcard_url, $data, true);
1024
1025                 return $data;
1026         }
1027
1028         /**
1029          * @brief Poll the hcard page (Diaspora and Friendica specific)
1030          *
1031          * @param string  $hcard_url Link to the hcard page
1032          * @param array   $data      The already fetched data
1033          * @param boolean $dfrn      Poll DFRN specific data
1034          *
1035          * @return array hcard data
1036          */
1037         private static function pollHcard($hcard_url, $data, $dfrn = false)
1038         {
1039                 $ret = Network::curl($hcard_url);
1040                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1041                         return false;
1042                 }
1043                 $content = $ret['body'];
1044                 if (!$content) {
1045                         return false;
1046                 }
1047
1048                 $doc = new DOMDocument();
1049                 if (!@$doc->loadHTML($content)) {
1050                         return false;
1051                 }
1052
1053                 $xpath = new DomXPath($doc);
1054
1055                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
1056                 if (!is_object($vcards)) {
1057                         return false;
1058                 }
1059
1060                 if (!isset($data["baseurl"])) {
1061                         $data["baseurl"] = "";
1062                 }
1063
1064                 if ($vcards->length > 0) {
1065                         $vcard = $vcards->item(0);
1066
1067                         // We have to discard the guid from the hcard in favour of the guid from lrdd
1068                         // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
1069                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
1070                         if (($search->length > 0) && empty($data["guid"])) {
1071                                 $data["guid"] = $search->item(0)->nodeValue;
1072                         }
1073
1074                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
1075                         if ($search->length > 0) {
1076                                 $data["nick"] = $search->item(0)->nodeValue;
1077                         }
1078
1079                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
1080                         if ($search->length > 0) {
1081                                 $data["name"] = $search->item(0)->nodeValue;
1082                         }
1083
1084                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
1085                         if ($search->length > 0) {
1086                                 $data["searchable"] = $search->item(0)->nodeValue;
1087                         }
1088
1089                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
1090                         if ($search->length > 0) {
1091                                 $data["pubkey"] = $search->item(0)->nodeValue;
1092                                 if (strstr($data["pubkey"], 'RSA ')) {
1093                                         $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
1094                                 }
1095                         }
1096
1097                         $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
1098                         if ($search->length > 0) {
1099                                 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
1100                         }
1101                 }
1102
1103                 $avatar = [];
1104                 if (!empty($vcard)) {
1105                         $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
1106                         foreach ($photos as $photo) {
1107                                 $attr = [];
1108                                 foreach ($photo->attributes as $attribute) {
1109                                         $attr[$attribute->name] = trim($attribute->value);
1110                                 }
1111
1112                                 if (isset($attr["src"]) && isset($attr["width"])) {
1113                                         $avatar[$attr["width"]] = $attr["src"];
1114                                 }
1115
1116                                 // We don't have a width. So we just take everything that we got.
1117                                 // This is a Hubzilla workaround which doesn't send a width.
1118                                 if ((sizeof($avatar) == 0) && !empty($attr["src"])) {
1119                                         $avatar[] = $attr["src"];
1120                                 }
1121                         }
1122                 }
1123
1124                 if (sizeof($avatar)) {
1125                         ksort($avatar);
1126                         $data["photo"] = self::fixAvatar(array_pop($avatar), $data["baseurl"]);
1127                 }
1128
1129                 if ($dfrn) {
1130                         // Poll DFRN specific data
1131                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
1132                         if ($search->length > 0) {
1133                                 foreach ($search as $link) {
1134                                         //$data["request"] = $search->item(0)->nodeValue;
1135                                         $attr = [];
1136                                         foreach ($link->attributes as $attribute) {
1137                                                 $attr[$attribute->name] = trim($attribute->value);
1138                                         }
1139
1140                                         $data[substr($attr["rel"], 5)] = $attr["href"];
1141                                 }
1142                         }
1143
1144                         // Older Friendica versions had used the "uid" field differently than newer versions
1145                         if (!empty($data["nick"]) && !empty($data["guid"]) && ($data["nick"] == $data["guid"])) {
1146                                 unset($data["guid"]);
1147                         }
1148                 }
1149
1150
1151                 return $data;
1152         }
1153
1154         /**
1155          * @brief Check for Diaspora contact
1156          *
1157          * @param array $webfinger Webfinger data
1158          *
1159          * @return array Diaspora data
1160          */
1161         private static function diaspora($webfinger)
1162         {
1163                 $hcard_url = "";
1164                 $data = [];
1165                 foreach ($webfinger["links"] as $link) {
1166                         if (($link["rel"] == "http://microformats.org/profile/hcard") && ($link["href"] != "")) {
1167                                 $hcard_url = $link["href"];
1168                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") && ($link["href"] != "")) {
1169                                 $data["baseurl"] = trim($link["href"], '/');
1170                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") && ($link["href"] != "")) {
1171                                 $data["guid"] = $link["href"];
1172                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") && ($link["type"] == "text/html") && ($link["href"] != "")) {
1173                                 $data["url"] = $link["href"];
1174                         } elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
1175                                 $data["poll"] = $link["href"];
1176                         } elseif (($link["rel"] == NAMESPACE_POCO) && ($link["href"] != "")) {
1177                                 $data["poco"] = $link["href"];
1178                         } elseif (($link["rel"] == "salmon") && ($link["href"] != "")) {
1179                                 $data["notify"] = $link["href"];
1180                         } elseif (($link["rel"] == "diaspora-public-key") && ($link["href"] != "")) {
1181                                 $data["pubkey"] = base64_decode($link["href"]);
1182
1183                                 //if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
1184                                 if (strstr($data["pubkey"], 'RSA ')) {
1185                                         $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
1186                                 }
1187                         }
1188                 }
1189
1190                 if (!isset($data["url"]) || ($hcard_url == "")) {
1191                         return false;
1192                 }
1193
1194                 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
1195                         foreach ($webfinger["aliases"] as $alias) {
1196                                 if (normalise_link($alias) != normalise_link($data["url"]) && ! strstr($alias, "@")) {
1197                                         $data["alias"] = $alias;
1198                                 } elseif (substr($alias, 0, 5) == 'acct:') {
1199                                         $data["addr"] = substr($alias, 5);
1200                                 }
1201                         }
1202                 }
1203
1204                 if (!empty($webfinger["subject"]) && (substr($webfinger["subject"], 0, 5) == 'acct:')) {
1205                         $data["addr"] = substr($webfinger["subject"], 5);
1206                 }
1207
1208                 // Fetch further information from the hcard
1209                 $data = self::pollHcard($hcard_url, $data);
1210
1211                 if (!$data) {
1212                         return false;
1213                 }
1214
1215                 if (isset($data["url"])
1216                         && isset($data["guid"])
1217                         && isset($data["baseurl"])
1218                         && isset($data["pubkey"])
1219                         && ($hcard_url != "")
1220                 ) {
1221                         $data["network"] = NETWORK_DIASPORA;
1222
1223                         // The Diaspora handle must always be lowercase
1224                         if (!empty($data["addr"])) {
1225                                 $data["addr"] = strtolower($data["addr"]);
1226                         }
1227
1228                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
1229                         $data["notify"] = $data["baseurl"] . "/receive/users/" . $data["guid"];
1230                         $data["batch"]  = $data["baseurl"] . "/receive/public";
1231                 } else {
1232                         return false;
1233                 }
1234
1235                 return $data;
1236         }
1237
1238         /**
1239          * @brief Check for OStatus contact
1240          *
1241          * @param array $webfinger Webfinger data
1242          * @param bool  $short     Short detection mode
1243          *
1244          * @return array|bool OStatus data or "false" on error or "true" on short mode
1245          */
1246         private static function ostatus($webfinger, $short = false)
1247         {
1248                 $data = [];
1249
1250                 if (!empty($webfinger["aliases"]) && is_array($webfinger["aliases"])) {
1251                         foreach ($webfinger["aliases"] as $alias) {
1252                                 if (strstr($alias, "@") && !strstr(normalise_link($alias), "http://")) {
1253                                         $data["addr"] = str_replace('acct:', '', $alias);
1254                                 }
1255                         }
1256                 }
1257
1258                 if (!empty($webfinger["subject"]) && strstr($webfinger["subject"], "@")
1259                         && !strstr(normalise_link($webfinger["subject"]), "http://")
1260                 ) {
1261                         $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
1262                 }
1263
1264                 $pubkey = "";
1265                 if (is_array($webfinger["links"])) {
1266                         foreach ($webfinger["links"] as $link) {
1267                                 if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1268                                         && ($link["type"] == "text/html")
1269                                         && ($link["href"] != "")
1270                                 ) {
1271                                         $data["url"] = $link["href"];
1272                                 } elseif (($link["rel"] == "salmon") && ($link["href"] != "")) {
1273                                         $data["notify"] = $link["href"];
1274                                 } elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
1275                                         $data["poll"] = $link["href"];
1276                                 } elseif (($link["rel"] == "magic-public-key") && ($link["href"] != "")) {
1277                                         $pubkey = $link["href"];
1278
1279                                         if (substr($pubkey, 0, 5) === 'data:') {
1280                                                 if (strstr($pubkey, ',')) {
1281                                                         $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
1282                                                 } else {
1283                                                         $pubkey = substr($pubkey, 5);
1284                                                 }
1285                                         } elseif (normalise_link($pubkey) == 'http://') {
1286                                                 $ret = Network::curl($pubkey);
1287                                                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1288                                                         return false;
1289                                                 }
1290                                                 $pubkey = $ret['body'];
1291                                         }
1292
1293                                         $key = explode(".", $pubkey);
1294
1295                                         if (sizeof($key) >= 3) {
1296                                                 $m = base64url_decode($key[1]);
1297                                                 $e = base64url_decode($key[2]);
1298                                                 $data["pubkey"] = Crypto::meToPem($m, $e);
1299                                         }
1300                                 }
1301                         }
1302                 }
1303
1304                 if (isset($data["notify"]) && isset($data["pubkey"])
1305                         && isset($data["poll"])
1306                         && isset($data["url"])
1307                 ) {
1308                         $data["network"] = NETWORK_OSTATUS;
1309                 } else {
1310                         return false;
1311                 }
1312
1313                 if ($short) {
1314                         return true;
1315                 }
1316
1317                 // Fetch all additional data from the feed
1318                 $ret = Network::curl($data["poll"]);
1319                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1320                         return false;
1321                 }
1322                 $feed = $ret['body'];
1323                 $dummy1 = null;
1324                 $dummy2 = null;
1325                 $dummy2 = null;
1326                 $feed_data = Feed::import($feed, $dummy1, $dummy2, $dummy3, true);
1327                 if (!$feed_data) {
1328                         return false;
1329                 }
1330
1331                 if (!empty($feed_data["header"]["author-name"])) {
1332                         $data["name"] = $feed_data["header"]["author-name"];
1333                 }
1334                 if (!empty($feed_data["header"]["author-nick"])) {
1335                         $data["nick"] = $feed_data["header"]["author-nick"];
1336                 }
1337                 if (!empty($feed_data["header"]["author-avatar"])) {
1338                         $data["photo"] = self::fixAvatar($feed_data["header"]["author-avatar"], $data["url"]);
1339                 }
1340                 if (!empty($feed_data["header"]["author-id"])) {
1341                         $data["alias"] = $feed_data["header"]["author-id"];
1342                 }
1343                 if (!empty($feed_data["header"]["author-location"])) {
1344                         $data["location"] = $feed_data["header"]["author-location"];
1345                 }
1346                 if (!empty($feed_data["header"]["author-about"])) {
1347                         $data["about"] = $feed_data["header"]["author-about"];
1348                 }
1349                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
1350                 // So we take the value that we just fetched, although the other one worked as well
1351                 if (!empty($feed_data["header"]["author-link"])) {
1352                         $data["url"] = $feed_data["header"]["author-link"];
1353                 }
1354
1355                 if (($data['poll'] == $data['url']) && ($data["alias"] != '')) {
1356                         $data['url'] = $data["alias"];
1357                         $data["alias"] = '';
1358                 }
1359
1360                 /// @todo Fetch location and "about" from the feed as well
1361                 return $data;
1362         }
1363
1364         /**
1365          * @brief Fetch data from a pump.io profile page
1366          *
1367          * @param string $profile_link Link to the profile page
1368          *
1369          * @return array profile data
1370          */
1371         private static function pumpioProfileData($profile_link)
1372         {
1373                 $doc = new DOMDocument();
1374                 if (!@$doc->loadHTMLFile($profile_link)) {
1375                         return false;
1376                 }
1377
1378                 $xpath = new DomXPath($doc);
1379
1380                 $data = [];
1381
1382                 $data["name"] = $xpath->query("//span[contains(@class, 'p-name')]")->item(0)->nodeValue;
1383
1384                 if ($data["name"] == '') {
1385                         // This is ugly - but pump.io doesn't seem to know a better way for it
1386                         $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1387                         $pos = strpos($data["name"], chr(10));
1388                         if ($pos) {
1389                                 $data["name"] = trim(substr($data["name"], 0, $pos));
1390                         }
1391                 }
1392
1393                 $data["location"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'p-locality')]");
1394
1395                 if ($data["location"] == '') {
1396                         $data["location"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'location')]");
1397                 }
1398
1399                 $data["about"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'p-note')]");
1400
1401                 if ($data["about"] == '') {
1402                         $data["about"] = XML::getFirstNodeValue($xpath, "//p[contains(@class, 'summary')]");
1403                 }
1404
1405                 $avatar = $xpath->query("//img[contains(@class, 'u-photo')]")->item(0);
1406                 if (!$avatar) {
1407                         $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1408                 }
1409                 if ($avatar) {
1410                         foreach ($avatar->attributes as $attribute) {
1411                                 if ($attribute->name == "src") {
1412                                         $data["photo"] = trim($attribute->value);
1413                                 }
1414                         }
1415                 }
1416
1417                 return $data;
1418         }
1419
1420         /**
1421          * @brief Check for pump.io contact
1422          *
1423          * @param array $webfinger Webfinger data
1424          *
1425          * @return array pump.io data
1426          */
1427         private static function pumpio($webfinger, $addr)
1428         {
1429                 $data = [];
1430                 foreach ($webfinger["links"] as $link) {
1431                         if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1432                                 && ($link["type"] == "text/html")
1433                                 && ($link["href"] != "")
1434                         ) {
1435                                 $data["url"] = $link["href"];
1436                         } elseif (($link["rel"] == "activity-inbox") && ($link["href"] != "")) {
1437                                 $data["notify"] = $link["href"];
1438                         } elseif (($link["rel"] == "activity-outbox") && ($link["href"] != "")) {
1439                                 $data["poll"] = $link["href"];
1440                         } elseif (($link["rel"] == "dialback") && ($link["href"] != "")) {
1441                                 $data["dialback"] = $link["href"];
1442                         }
1443                 }
1444                 if (isset($data["poll"]) && isset($data["notify"])
1445                         && isset($data["dialback"])
1446                         && isset($data["url"])
1447                 ) {
1448                         // by now we use these fields only for the network type detection
1449                         // So we unset all data that isn't used at the moment
1450                         unset($data["dialback"]);
1451
1452                         $data["network"] = NETWORK_PUMPIO;
1453                 } else {
1454                         return false;
1455                 }
1456
1457                 $profile_data = self::pumpioProfileData($data["url"]);
1458
1459                 if (!$profile_data) {
1460                         return false;
1461                 }
1462
1463                 $data = array_merge($data, $profile_data);
1464
1465                 if (($addr != '') && ($data['name'] != '')) {
1466                         $name = trim(str_replace($addr, '', $data['name']));
1467                         if ($name != '') {
1468                                 $data['name'] = $name;
1469                         }
1470                 }
1471
1472                 return $data;
1473         }
1474
1475         /**
1476          * @brief Check page for feed link
1477          *
1478          * @param string $url Page link
1479          *
1480          * @return string feed link
1481          */
1482         private static function getFeedLink($url)
1483         {
1484                 $doc = new DOMDocument();
1485
1486                 if (!@$doc->loadHTMLFile($url)) {
1487                         return false;
1488                 }
1489
1490                 $xpath = new DomXPath($doc);
1491
1492                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
1493                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
1494                 if (!is_object($feeds)) {
1495                         return false;
1496                 }
1497
1498                 if ($feeds->length == 0) {
1499                         return false;
1500                 }
1501
1502                 $feed_url = "";
1503
1504                 foreach ($feeds as $feed) {
1505                         $attr = [];
1506                         foreach ($feed->attributes as $attribute) {
1507                                 $attr[$attribute->name] = trim($attribute->value);
1508                         }
1509
1510                         if ($feed_url == "") {
1511                                 $feed_url = $attr["href"];
1512                         }
1513                 }
1514
1515                 return $feed_url;
1516         }
1517
1518         /**
1519          * @brief Check for feed contact
1520          *
1521          * @param string  $url   Profile link
1522          * @param boolean $probe Do a probe if the page contains a feed link
1523          *
1524          * @return array feed data
1525          */
1526         private static function feed($url, $probe = true)
1527         {
1528                 $ret = Network::curl($url);
1529                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1530                         return false;
1531                 }
1532                 $feed = $ret['body'];
1533                 $dummy1 = $dummy2 = $dummy3 = null;
1534                 $feed_data = Feed::import($feed, $dummy1, $dummy2, $dummy3, true);
1535
1536                 if (!$feed_data) {
1537                         if (!$probe) {
1538                                 return false;
1539                         }
1540
1541                         $feed_url = self::getFeedLink($url);
1542
1543                         if (!$feed_url) {
1544                                 return false;
1545                         }
1546
1547                         return self::feed($feed_url, false);
1548                 }
1549
1550                 if (!empty($feed_data["header"]["author-name"])) {
1551                         $data["name"] = $feed_data["header"]["author-name"];
1552                 }
1553
1554                 if (!empty($feed_data["header"]["author-nick"])) {
1555                         $data["nick"] = $feed_data["header"]["author-nick"];
1556                 }
1557
1558                 if (!empty($feed_data["header"]["author-avatar"])) {
1559                         $data["photo"] = $feed_data["header"]["author-avatar"];
1560                 }
1561
1562                 if (!empty($feed_data["header"]["author-id"])) {
1563                         $data["alias"] = $feed_data["header"]["author-id"];
1564                 }
1565
1566                 $data["url"] = $url;
1567                 $data["poll"] = $url;
1568
1569                 if (!empty($feed_data["header"]["author-link"])) {
1570                         $data["baseurl"] = $feed_data["header"]["author-link"];
1571                 } else {
1572                         $data["baseurl"] = $data["url"];
1573                 }
1574
1575                 $data["network"] = NETWORK_FEED;
1576
1577                 return $data;
1578         }
1579
1580         /**
1581          * @brief Check for mail contact
1582          *
1583          * @param string  $uri Profile link
1584          * @param integer $uid User ID
1585          *
1586          * @return array mail data
1587          */
1588         private static function mail($uri, $uid)
1589         {
1590                 if (!Network::isEmailDomainValid($uri)) {
1591                         return false;
1592                 }
1593
1594                 if ($uid == 0) {
1595                         return false;
1596                 }
1597
1598                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
1599
1600                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
1601
1602                 if (DBM::is_result($x) && DBM::is_result($r)) {
1603                         $mailbox = Email::constructMailboxName($r[0]);
1604                         $password = '';
1605                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password, $x[0]['prvkey']);
1606                         $mbox = Email::connect($mailbox, $r[0]['user'], $password);
1607                         if (!$mbox) {
1608                                 return false;
1609                         }
1610                 }
1611
1612                 $msgs = Email::poll($mbox, $uri);
1613                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
1614
1615                 if (!count($msgs)) {
1616                         return false;
1617                 }
1618
1619                 $phost = substr($uri, strpos($uri, '@') + 1);
1620
1621                 $data = [];
1622                 $data["addr"]    = $uri;
1623                 $data["network"] = NETWORK_MAIL;
1624                 $data["name"]    = substr($uri, 0, strpos($uri, '@'));
1625                 $data["nick"]    = $data["name"];
1626                 $data["photo"]   = Network::lookupAvatarByEmail($uri);
1627                 $data["url"]     = 'mailto:'.$uri;
1628                 $data["notify"]  = 'smtp '.random_string();
1629                 $data["poll"]    = 'email '.random_string();
1630
1631                 $x = Email::messageMeta($mbox, $msgs[0]);
1632                 if (stristr($x[0]->from, $uri)) {
1633                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1634                 } elseif (stristr($x[0]->to, $uri)) {
1635                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1636                 }
1637                 if (isset($adr)) {
1638                         foreach ($adr as $feadr) {
1639                                 if ((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1640                                         &&(strcasecmp($feadr->host, $phost) == 0)
1641                                         && (strlen($feadr->personal))
1642                                 ) {
1643                                         $personal = imap_mime_header_decode($feadr->personal);
1644                                         $data["name"] = "";
1645                                         foreach ($personal as $perspart) {
1646                                                 if ($perspart->charset != "default") {
1647                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1648                                                 } else {
1649                                                         $data["name"] .= $perspart->text;
1650                                                 }
1651                                         }
1652
1653                                         $data["name"] = notags($data["name"]);
1654                                 }
1655                         }
1656                 }
1657                 if (!empty($mbox)) {
1658                         imap_close($mbox);
1659                 }
1660
1661                 return $data;
1662         }
1663
1664         /**
1665          * @brief Mix two paths together to possibly fix missing parts
1666          *
1667          * @param string $avatar Path to the avatar
1668          * @param string $base   Another path that is hopefully complete
1669          *
1670          * @return string fixed avatar path
1671          */
1672         public static function fixAvatar($avatar, $base)
1673         {
1674                 $base_parts = parse_url($base);
1675
1676                 // Remove all parts that could create a problem
1677                 unset($base_parts['path']);
1678                 unset($base_parts['query']);
1679                 unset($base_parts['fragment']);
1680
1681                 $avatar_parts = parse_url($avatar);
1682
1683                 // Now we mix them
1684                 $parts = array_merge($base_parts, $avatar_parts);
1685
1686                 // And put them together again
1687                 $scheme   = isset($parts['scheme'])   ? $parts['scheme'] . '://' : '';
1688                 $host     = isset($parts['host'])     ? $parts['host']           : '';
1689                 $port     = isset($parts['port'])     ? ':' . $parts['port']     : '';
1690                 $path     = isset($parts['path'])     ? $parts['path']           : '';
1691                 $query    = isset($parts['query'])    ? '?' . $parts['query']    : '';
1692                 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
1693
1694                 $fixed = $scheme.$host.$port.$path.$query.$fragment;
1695
1696                 logger('Base: '.$base.' - Avatar: '.$avatar.' - Fixed: '.$fixed, LOGGER_DATA);
1697
1698                 return $fixed;
1699         }
1700 }