src/Network/Probe.php

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