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 Probes for XRD data
  63          *
  64          * @param string $host The host part of an url
  65          *
  66          * @return array
  67          *      'lrdd' => Link to LRDD endpoint
  68          *      'lrdd-xml' => Link to LRDD endpoint in XML format
  69          *      'lrdd-json' => Link to LRDD endpoint in JSON format
  70          */
  71         private function xrd($host) {
  72
  73                 // Reset the static variable
  74                 self::$baseurl = '';
  75
  76                 $ssl_url = "https://".$host."/.well-known/host-meta";
  77                 $url = "http://".$host."/.well-known/host-meta";
  78
  79                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
  80                 $redirects = 0;
  81
  82                 logger("Probing for ".$host, LOGGER_DEBUG);
  83
  84                 $ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  85                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  86                         return false;
  87                 }
  88                 $xml = $ret['body'];
  89
  90                 $xrd = parse_xml_string($xml, false);
  91
  92                 if (!is_object($xrd)) {
  93                         $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  94                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  95                                 return false;
  96                         }
  97                         $xml = $ret['body'];
  98                         $xrd = parse_xml_string($xml, false);
  99                 }
 100                 if (!is_object($xrd)) {
 101                         return false;
 102                 }
 103
 104                 $links = xml::element_to_array($xrd);
 105                 if (!isset($links["xrd"]["link"])) {
 106                         logger("No xrd data found for ".$host, LOGGER_DEBUG);
 107                         return false;
 108                 }
 109
 110                 $xrd_data = array();
 111
 112                 foreach ($links["xrd"]["link"] as $value => $link) {
 113                         if (isset($link["@attributes"])) {
 114                                 $attributes = $link["@attributes"];
 115                         } elseif ($value == "@attributes") {
 116                                 $attributes = $link;
 117                         } else {
 118                                 continue;
 119                         }
 120
 121                         if (($attributes["rel"] == "lrdd")
 122                                 AND ($attributes["type"] == "application/xrd+xml")
 123                         ) {
 124                                 $xrd_data["lrdd-xml"] = $attributes["template"];
 125                         } elseif (($attributes["rel"] == "lrdd")
 126                                 AND ($attributes["type"] == "application/json")
 127                         ) {
 128                                 $xrd_data["lrdd-json"] = $attributes["template"];
 129                         } elseif ($attributes["rel"] == "lrdd") {
 130                                 $xrd_data["lrdd"] = $attributes["template"];
 131                         }
 132                 }
 133
 134                 self::$baseurl = "http://".$host;
 135
 136                 return $xrd_data;
 137         }
 138
 139         /**
 140          * @brief Perform Webfinger lookup and return DFRN data
 141          *
 142          * Given an email style address, perform webfinger lookup and
 143          * return the resulting DFRN profile URL, or if no DFRN profile URL
 144          * is located, returns an OStatus subscription template (prefixed
 145          * with the string 'stat:' to identify it as on OStatus template).
 146          * If this isn't an email style address just return $webbie.
 147          * Return an empty string if email-style addresses but webfinger fails,
 148          * or if the resultant personal XRD doesn't contain a supported
 149          * subscription/friend-request attribute.
 150          *
 151          * amended 7/9/2011 to return an hcard which could save potentially loading
 152          * a lengthy content page to scrape dfrn attributes
 153          *
 154          * @param string $webbie Address that should be probed
 155          * @param string $hcard_url Link to the hcard - is returned by reference
 156          *
 157          * @return string profile link
 158          */
 159
 160         public static function webfingerDfrn($webbie, &$hcard_url) {
 161
 162                 $profile_link = '';
 163
 164                 $links = self::lrdd($webbie);
 165                 logger('webfingerDfrn: '.$webbie.':'.print_r($links, true), LOGGER_DATA);
 166                 if (count($links)) {
 167                         foreach ($links as $link) {
 168                                 if ($link['@attributes']['rel'] === NAMESPACE_DFRN) {
 169                                         $profile_link = $link['@attributes']['href'];
 170                                 }
 171                                 if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == "")) {
 172                                         $profile_link = 'stat:'.$link['@attributes']['template'];
 173                                 }
 174                                 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard') {
 175                                         $hcard_url = $link['@attributes']['href'];
 176                                 }
 177                         }
 178                 }
 179                 return $profile_link;
 180         }
 181
 182         /**
 183          * @brief Check an URI for LRDD data
 184          *
 185          * this is a replacement for the "lrdd" function in include/network.php.
 186          * It isn't used in this class and has some redundancies in the code.
 187          * When time comes we can check the existing calls for "lrdd" if we can rework them.
 188          *
 189          * @param string $uri Address that should be probed
 190          *
 191          * @return array uri data
 192          */
 193         public static function lrdd($uri) {
 194
 195                 $lrdd = self::xrd($uri);
 196                 $webfinger = null;
 197
 198                 if (!$lrdd) {
 199                         $parts = @parse_url($uri);
 200                         if (!$parts) {
 201                                 return array();
 202                         }
 203
 204                         $host = $parts["host"];
 205                         if (isset($parts["port"])) {
 206                                 $host .= ':'.$parts["port"];
 207                         }
 208
 209                         $path_parts = explode("/", trim($parts["path"], "/"));
 210
 211                         $nick = array_pop($path_parts);
 212
 213                         do {
 214                                 $lrdd = self::xrd($host);
 215                                 $host .= "/".array_shift($path_parts);
 216                         } while (!$lrdd AND (sizeof($path_parts) > 0));
 217                 }
 218
 219                 if (!$lrdd) {
 220                         logger("No lrdd data found for ".$uri, LOGGER_DEBUG);
 221                         return array();
 222                 }
 223
 224                 foreach ($lrdd as $key => $link) {
 225                         if ($webfinger) {
 226                                 continue;
 227                         }
 228
 229                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 230                                 continue;
 231                         }
 232
 233                         $path = str_replace('{uri}', urlencode($uri), $link);
 234                         $webfinger = self::webfinger($path);
 235
 236                         if (!$webfinger AND (strstr($uri, "@"))) {
 237                                 $path = str_replace('{uri}', urlencode("acct:".$uri), $link);
 238                                 $webfinger = self::webfinger($path);
 239                         }
 240
 241                         // Special treatment for Mastodon
 242                         // Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 243                         // But the webfinger for this format fails.
 244                         if (!$webfinger AND isset($nick)) {
 245                                 // Mastodon uses a "@" as prefix for usernames in their url format
 246                                 $nick = ltrim($nick, '@');
 247
 248                                 $addr = $nick."@".$host;
 249
 250                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 251                                 $webfinger = self::webfinger($path);
 252                         }
 253                 }
 254
 255                 if (!is_array($webfinger["links"])) {
 256                         logger("No webfinger links found for ".$uri, LOGGER_DEBUG);
 257                         return false;
 258                 }
 259
 260                 $data = array();
 261
 262                 foreach ($webfinger["links"] as $link) {
 263                         $data[] = array("@attributes" => $link);
 264                 }
 265
 266                 if (is_array($webfinger["aliases"])) {
 267                         foreach ($webfinger["aliases"] as $alias) {
 268                                 $data[] = array("@attributes" =>
 269                                                         array("rel" => "alias",
 270                                                                 "href" => $alias));
 271                         }
 272                 }
 273
 274                 return $data;
 275         }
 276
 277         /**
 278          * @brief Fetch information (protocol endpoints and user information) about a given uri
 279          *
 280          * @param string $uri Address that should be probed
 281          * @param string $network Test for this specific network
 282          * @param integer $uid User ID for the probe (only used for mails)
 283          * @param boolean $cache Use cached values?
 284          *
 285          * @return array uri data
 286          */
 287         public static function uri($uri, $network = "", $uid = 0, $cache = true) {
 288
 289                 if ($cache) {
 290                         $result = Cache::get("probe_url:".$network.":".$uri);
 291                         if (!is_null($result)) {
 292                                 return $result;
 293                         }
 294                 }
 295
 296                 if ($uid == 0) {
 297                         $uid = local_user();
 298                 }
 299
 300                 $data = self::detect($uri, $network, $uid);
 301
 302                 if (!isset($data["url"])) {
 303                         $data["url"] = $uri;
 304                 }
 305
 306                 if ($data["photo"] != "") {
 307                         $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 308                 } else {
 309                         $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 310                 }
 311
 312                 if (!isset($data["name"]) OR ($data["name"] == "")) {
 313                         if (isset($data["nick"])) {
 314                                 $data["name"] = $data["nick"];
 315                         }
 316
 317                         if ($data["name"] == "") {
 318                                 $data["name"] = $data["url"];
 319                         }
 320                 }
 321
 322                 if (!isset($data["nick"]) OR ($data["nick"] == "")) {
 323                         $data["nick"] = strtolower($data["name"]);
 324
 325                         if (strpos($data['nick'], ' ')) {
 326                                 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
 327                         }
 328                 }
 329
 330                 if (self::$baseurl != "") {
 331                         $data["baseurl"] = self::$baseurl;
 332                 }
 333
 334                 if (!isset($data["network"])) {
 335                         $data["network"] = NETWORK_PHANTOM;
 336                 }
 337
 338                 $data = self::rearrangeData($data);
 339
 340                 // Only store into the cache if the value seems to be valid
 341                 if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
 342                         Cache::set("probe_url:".$network.":".$uri, $data, CACHE_DAY);
 343
 344                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 345                         /// The biggest problem is the avatar picture that could have a reduced image size.
 346                         /// It should only be updated if the existing picture isn't existing anymore.
 347                         /// We only update the contact when it is no probing for a specific network.
 348                         if (($data['network'] != NETWORK_FEED)
 349                                 AND ($network == "")
 350                                 AND $data["name"]
 351                                 AND $data["nick"]
 352                                 AND $data["url"]
 353                                 AND $data["addr"]
 354                                 AND $data["poll"]
 355                         ) {
 356                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 357                                                 `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
 358                                         WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
 359                                         dbesc($data["name"]),
 360                                         dbesc($data["nick"]),
 361                                         dbesc($data["url"]),
 362                                         dbesc($data["addr"]),
 363                                         dbesc($data["notify"]),
 364                                         dbesc($data["poll"]),
 365                                         dbesc($data["alias"]),
 366                                         dbesc(datetime_convert()),
 367                                         dbesc(normalise_link($data['url']))
 368                                 );
 369                         }
 370                 }
 371
 372                 return $data;
 373         }
 374
 375         /**
 376          * @brief Fetch information (protocol endpoints and user information) about a given uri
 377          *
 378          * This function is only called by the "uri" function that adds caching and rearranging of data.
 379          *
 380          * @param string $uri Address that should be probed
 381          * @param string $network Test for this specific network
 382          * @param integer $uid User ID for the probe (only used for mails)
 383          *
 384          * @return array uri data
 385          */
 386         private function detect($uri, $network, $uid) {
 387                 $parts = parse_url($uri);
 388
 389                 if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
 390                         $host = $parts["host"];
 391                         if (isset($parts["port"])) {
 392                                 $host .= ':'.$parts["port"];
 393                         }
 394
 395                         if ($host == 'twitter.com') {
 396                                 return array("network" => NETWORK_TWITTER);
 397                         }
 398                         $lrdd = self::xrd($host);
 399
 400                         $path_parts = explode("/", trim($parts["path"], "/"));
 401
 402                         while (!$lrdd AND (sizeof($path_parts) > 1)) {
 403                                 $host .= "/".array_shift($path_parts);
 404                                 $lrdd = self::xrd($host);
 405                         }
 406                         if (!$lrdd) {
 407                                 return self::feed($uri);
 408                         }
 409                         $nick = array_pop($path_parts);
 410
 411                         // Mastodon uses a "@" as prefix for usernames in their url format
 412                         $nick = ltrim($nick, '@');
 413
 414                         $addr = $nick."@".$host;
 415
 416                 } elseif (strstr($uri, '@')) {
 417                         // If the URI starts with "mailto:" then jump directly to the mail detection
 418                         if (strpos($uri, 'mailto:') !== false) {
 419                                 $uri = str_replace('mailto:', '', $uri);
 420                                 return self::mail($uri, $uid);
 421                         }
 422
 423                         if ($network == NETWORK_MAIL) {
 424                                 return self::mail($uri, $uid);
 425                         }
 426                         // Remove "acct:" from the URI
 427                         $uri = str_replace('acct:', '', $uri);
 428
 429                         $host = substr($uri, strpos($uri, '@') + 1);
 430                         $nick = substr($uri, 0, strpos($uri, '@'));
 431
 432                         if (strpos($uri, '@twitter.com')) {
 433                                 return array("network" => NETWORK_TWITTER);
 434                         }
 435                         $lrdd = self::xrd($host);
 436
 437                         if (!$lrdd) {
 438                                 return self::mail($uri, $uid);
 439                         }
 440                         $addr = $uri;
 441
 442                 } else {
 443                         logger("Uri ".$uri." was not detectable", LOGGER_DEBUG);
 444                         return false;
 445                 }
 446
 447                 $webfinger = false;
 448
 449                 /// @todo Do we need the prefix "acct:" or "acct://"?
 450
 451                 foreach ($lrdd as $key => $link) {
 452                         if ($webfinger) {
 453                                 continue;
 454                         }
 455                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 456                                 continue;
 457                         }
 458                         // At first try it with the given uri
 459                         $path = str_replace('{uri}', urlencode($uri), $link);
 460                         $webfinger = self::webfinger($path);
 461
 462                         // We cannot be sure that the detected address was correct, so we don't use the values
 463                         if ($webfinger AND ($uri != $addr)) {
 464                                 $nick = "";
 465                                 $addr = "";
 466                         }
 467
 468                         // Try webfinger with the address (user@domain.tld)
 469                         if (!$webfinger) {
 470                                 $path = str_replace('{uri}', urlencode($addr), $link);
 471                                 $webfinger = self::webfinger($path);
 472                         }
 473
 474                         // Mastodon needs to have it with "acct:"
 475                         if (!$webfinger) {
 476                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 477                                 $webfinger = self::webfinger($path);
 478                         }
 479                 }
 480                 if (!$webfinger) {
 481                         return self::feed($uri);
 482                 }
 483
 484                 $result = false;
 485
 486                 logger("Probing ".$uri, LOGGER_DEBUG);
 487
 488                 if (in_array($network, array("", NETWORK_DFRN))) {
 489                         $result = self::dfrn($webfinger);
 490                 }
 491                 if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA)) {
 492                         $result = self::diaspora($webfinger);
 493                 }
 494                 if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS)) {
 495                         $result = self::ostatus($webfinger);
 496                 }
 497                 if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO)) {
 498                         $result = self::pumpio($webfinger);
 499                 }
 500                 if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED)) {
 501                         $result = self::feed($uri);
 502                 } else {
 503                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 504                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 505                         if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != "")) {
 506                                 $result["nick"] = $nick;
 507                         }
 508
 509                         if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != "")) {
 510                                 $result["addr"] = $addr;
 511                         }
 512                 }
 513
 514                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 515
 516                 if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
 517                         $pos = strpos($result["url"], $host);
 518                         if ($pos) {
 519                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 520                         }
 521                 }
 522
 523                 return $result;
 524         }
 525
 526         /**
 527          * @brief Perform a webfinger request.
 528          *
 529          * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
 530          *
 531          * @param string $url Address that should be probed
 532          *
 533          * @return array webfinger data
 534          */
 535         private function webfinger($url) {
 536
 537                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
 538                 $redirects = 0;
 539
 540                 $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
 541                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 542                         return false;
 543                 }
 544                 $data = $ret['body'];
 545
 546                 $xrd = parse_xml_string($data, false);
 547
 548                 if (!is_object($xrd)) {
 549                         // If it is not XML, maybe it is JSON
 550                         $webfinger = json_decode($data, true);
 551
 552                         if (!isset($webfinger["links"])) {
 553                                 logger("No json webfinger links for ".$url, LOGGER_DEBUG);
 554                                 return false;
 555                         }
 556
 557                         return $webfinger;
 558                 }
 559
 560                 $xrd_arr = xml::element_to_array($xrd);
 561                 if (!isset($xrd_arr["xrd"]["link"])) {
 562                         logger("No XML webfinger links for ".$url, LOGGER_DEBUG);
 563                         return false;
 564                 }
 565
 566                 $webfinger = array();
 567
 568                 if (isset($xrd_arr["xrd"]["subject"])) {
 569                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 570                 }
 571
 572                 if (isset($xrd_arr["xrd"]["alias"])) {
 573                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 574                 }
 575
 576                 $webfinger["links"] = array();
 577
 578                 foreach ($xrd_arr["xrd"]["link"] as $value => $data) {
 579                         if (isset($data["@attributes"])) {
 580                                 $attributes = $data["@attributes"];
 581                         } elseif ($value == "@attributes") {
 582                                 $attributes = $data;
 583                         } else {
 584                                 continue;
 585                         }
 586
 587                         $webfinger["links"][] = $attributes;
 588                 }
 589                 return $webfinger;
 590         }
 591
 592         /**
 593          * @brief Poll the Friendica specific noscrape page.
 594          *
 595          * "noscrape" is a faster alternative to fetch the data from the hcard.
 596          * This functionality was originally created for the directory.
 597          *
 598          * @param string $noscrape_url Link to the noscrape page
 599          * @param array $data The already fetched data
 600          *
 601          * @return array noscrape data
 602          */
 603         private function pollNoscrape($noscrape_url, $data) {
 604                 $ret = z_fetch_url($noscrape_url);
 605                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 606                         return false;
 607                 }
 608                 $content = $ret['body'];
 609                 if (!$content) {
 610                         logger("Empty body for ".$noscrape_url, LOGGER_DEBUG);
 611                         return false;
 612                 }
 613
 614                 $json = json_decode($content, true);
 615                 if (!is_array($json)) {
 616                         logger("No json data for ".$noscrape_url, LOGGER_DEBUG);
 617                         return false;
 618                 }
 619
 620                 if (isset($json["fn"])) {
 621                         $data["name"] = $json["fn"];
 622                 }
 623
 624                 if (isset($json["addr"])) {
 625                         $data["addr"] = $json["addr"];
 626                 }
 627
 628                 if (isset($json["nick"])) {
 629                         $data["nick"] = $json["nick"];
 630                 }
 631
 632                 if (isset($json["comm"])) {
 633                         $data["community"] = $json["comm"];
 634                 }
 635
 636                 if (isset($json["tags"])) {
 637                         $keywords = implode(" ", $json["tags"]);
 638                         if ($keywords != "") {
 639                                 $data["keywords"] = $keywords;
 640                         }
 641                 }
 642
 643                 $location = formatted_location($json);
 644                 if ($location) {
 645                         $data["location"] = $location;
 646                 }
 647
 648                 if (isset($json["about"])) {
 649                         $data["about"] = $json["about"];
 650                 }
 651
 652                 if (isset($json["key"])) {
 653                         $data["pubkey"] = $json["key"];
 654                 }
 655
 656                 if (isset($json["photo"])) {
 657                         $data["photo"] = $json["photo"];
 658                 }
 659
 660                 if (isset($json["dfrn-request"])) {
 661                         $data["request"] = $json["dfrn-request"];
 662                 }
 663
 664                 if (isset($json["dfrn-confirm"])) {
 665                         $data["confirm"] = $json["dfrn-confirm"];
 666                 }
 667
 668                 if (isset($json["dfrn-notify"])) {
 669                         $data["notify"] = $json["dfrn-notify"];
 670                 }
 671
 672                 if (isset($json["dfrn-poll"])) {
 673                         $data["poll"] = $json["dfrn-poll"];
 674                 }
 675
 676                 return $data;
 677         }
 678
 679         /**
 680          * @brief Check for valid DFRN data
 681          *
 682          * @param array $data DFRN data
 683          *
 684          * @return int Number of errors
 685          */
 686         public static function validDfrn($data) {
 687                 $errors = 0;
 688                 if (!isset($data['key'])) {
 689                         $errors ++;
 690                 }
 691                 if (!isset($data['dfrn-request'])) {
 692                         $errors ++;
 693                 }
 694                 if (!isset($data['dfrn-confirm'])) {
 695                         $errors ++;
 696                 }
 697                 if (!isset($data['dfrn-notify'])) {
 698                         $errors ++;
 699                 }
 700                 if (!isset($data['dfrn-poll'])) {
 701                         $errors ++;
 702                 }
 703                 return $errors;
 704         }
 705
 706         /**
 707          * @brief Fetch data from a DFRN profile page and via "noscrape"
 708          *
 709          * @param string $profile_link Link to the profile page
 710          *
 711          * @return array profile data
 712          */
 713         public static function profile($profile_link) {
 714
 715                 $data = array();
 716
 717                 logger("Check profile ".$profile_link, LOGGER_DEBUG);
 718
 719                 // Fetch data via noscrape - this is faster
 720                 $noscrape_url = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile_link);
 721                 $data = self::pollNoscrape($noscrape_url, $data);
 722
 723                 if (!isset($data["notify"])
 724                         OR !isset($data["confirm"])
 725                         OR !isset($data["request"])
 726                         OR !isset($data["poll"])
 727                         OR !isset($data["poco"])
 728                         OR !isset($data["name"])
 729                         OR !isset($data["photo"])
 730                 ) {
 731                         $data = self::pollHcard($profile_link, $data, true);
 732                 }
 733
 734                 $prof_data = array();
 735                 $prof_data["addr"]         = $data["addr"];
 736                 $prof_data["nick"]         = $data["nick"];
 737                 $prof_data["dfrn-request"] = $data["request"];
 738                 $prof_data["dfrn-confirm"] = $data["confirm"];
 739                 $prof_data["dfrn-notify"]  = $data["notify"];
 740                 $prof_data["dfrn-poll"]    = $data["poll"];
 741                 $prof_data["dfrn-poco"]    = $data["poco"];
 742                 $prof_data["photo"]        = $data["photo"];
 743                 $prof_data["fn"]           = $data["name"];
 744                 $prof_data["key"]          = $data["pubkey"];
 745
 746                 logger("Result for profile ".$profile_link.": ".print_r($prof_data, true), LOGGER_DEBUG);
 747
 748                 return $prof_data;
 749         }
 750
 751         /**
 752          * @brief Check for DFRN contact
 753          *
 754          * @param array $webfinger Webfinger data
 755          *
 756          * @return array DFRN data
 757          */
 758         private function dfrn($webfinger) {
 759
 760                 $hcard_url = "";
 761                 $data = array();
 762                 foreach ($webfinger["links"] as $link) {
 763                         if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != "")) {
 764                                 $data["network"] = NETWORK_DFRN;
 765                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 766                                 $data["poll"] = $link["href"];
 767                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
 768                                 $data["url"] = $link["href"];
 769                         } elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
 770                                 $hcard_url = $link["href"];
 771                         } elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
 772                                 $data["poco"] = $link["href"];
 773                         } elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != "")) {
 774                                 $data["photo"] = $link["href"];
 775                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
 776                                 $data["baseurl"] = trim($link["href"], '/');
 777                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
 778                                 $data["guid"] = $link["href"];
 779                         } elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 780                                 $data["pubkey"] = base64_decode($link["href"]);
 781
 782                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 783                                 if (strstr($data["pubkey"], 'RSA ')) {
 784                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 785                                 }
 786                         }
 787                 }
 788
 789                 if (!isset($data["network"]) OR ($hcard_url == "")) {
 790                         return false;
 791                 }
 792
 793                 // Fetch data via noscrape - this is faster
 794                 $noscrape_url = str_replace("/hcard/", "/noscrape/", $hcard_url);
 795                 $data = self::pollNoscrape($noscrape_url, $data);
 796
 797                 if (isset($data["notify"])
 798                         AND isset($data["confirm"])
 799                         AND isset($data["request"])
 800                         AND isset($data["poll"])
 801                         AND isset($data["name"])
 802                         AND isset($data["photo"])
 803                 ) {
 804                         return $data;
 805                 }
 806
 807                 $data = self::pollHcard($hcard_url, $data, true);
 808
 809                 return $data;
 810         }
 811
 812         /**
 813          * @brief Poll the hcard page (Diaspora and Friendica specific)
 814          *
 815          * @param string $hcard_url Link to the hcard page
 816          * @param array $data The already fetched data
 817          * @param boolean $dfrn Poll DFRN specific data
 818          *
 819          * @return array hcard data
 820          */
 821         private function pollHcard($hcard_url, $data, $dfrn = false) {
 822                 $ret = z_fetch_url($hcard_url);
 823                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 824                         return false;
 825                 }
 826                 $content = $ret['body'];
 827                 if (!$content) {
 828                         return false;
 829                 }
 830
 831                 $doc = new DOMDocument();
 832                 if (!@$doc->loadHTML($content)) {
 833                         return false;
 834                 }
 835
 836                 $xpath = new DomXPath($doc);
 837
 838                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
 839                 if (!is_object($vcards)) {
 840                         return false;
 841                 }
 842
 843                 if ($vcards->length > 0) {
 844                         $vcard = $vcards->item(0);
 845
 846                         // We have to discard the guid from the hcard in favour of the guid from lrdd
 847                         // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 848                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
 849                         if (($search->length > 0) AND ($data["guid"] == "")) {
 850                                 $data["guid"] = $search->item(0)->nodeValue;
 851                         }
 852
 853                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
 854                         if ($search->length > 0) {
 855                                 $data["nick"] = $search->item(0)->nodeValue;
 856                         }
 857
 858                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
 859                         if ($search->length > 0) {
 860                                 $data["name"] = $search->item(0)->nodeValue;
 861                         }
 862
 863                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 864                         if ($search->length > 0) {
 865                                 $data["searchable"] = $search->item(0)->nodeValue;
 866                         }
 867
 868                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
 869                         if ($search->length > 0) {
 870                                 $data["pubkey"] = $search->item(0)->nodeValue;
 871                                 if (strstr($data["pubkey"], 'RSA ')) {
 872                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 873                                 }
 874                         }
 875
 876                         $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
 877                         if ($search->length > 0) {
 878                                 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
 879                         }
 880                 }
 881
 882                 $avatar = array();
 883                 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 884                 foreach ($photos as $photo) {
 885                         $attr = array();
 886                         foreach ($photo->attributes as $attribute) {
 887                                 $attr[$attribute->name] = trim($attribute->value);
 888                         }
 889
 890                         if (isset($attr["src"]) AND isset($attr["width"])) {
 891                                 $avatar[$attr["width"]] = $attr["src"];
 892                         }
 893
 894                         // We don't have a width. So we just take everything that we got.
 895                         // This is a Hubzilla workaround which doesn't send a width.
 896                         if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
 897                                 $avatar[] = $attr["src"];
 898                         }
 899                 }
 900
 901                 if (sizeof($avatar)) {
 902                         ksort($avatar);
 903                         $data["photo"] = self::fixAvatar(array_pop($avatar), $data["baseurl"]);
 904                 }
 905
 906                 if ($dfrn) {
 907                         // Poll DFRN specific data
 908                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
 909                         if ($search->length > 0) {
 910                                 foreach ($search as $link) {
 911                                         //$data["request"] = $search->item(0)->nodeValue;
 912                                         $attr = array();
 913                                         foreach ($link->attributes as $attribute) {
 914                                                 $attr[$attribute->name] = trim($attribute->value);
 915                                         }
 916
 917                                         $data[substr($attr["rel"], 5)] = $attr["href"];
 918                                 }
 919                         }
 920
 921                         // Older Friendica versions had used the "uid" field differently than newer versions
 922                         if ($data["nick"] == $data["guid"]) {
 923                                 unset($data["guid"]);
 924                         }
 925                 }
 926
 927
 928                 return $data;
 929         }
 930
 931         /**
 932          * @brief Check for Diaspora contact
 933          *
 934          * @param array $webfinger Webfinger data
 935          *
 936          * @return array Diaspora data
 937          */
 938         private function diaspora($webfinger) {
 939
 940                 $hcard_url = "";
 941                 $data = array();
 942                 foreach ($webfinger["links"] as $link) {
 943                         if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
 944                                 $hcard_url = $link["href"];
 945                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
 946                                 $data["baseurl"] = trim($link["href"], '/');
 947                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
 948                                 $data["guid"] = $link["href"];
 949                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
 950                                 $data["url"] = $link["href"];
 951                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 952                                 $data["poll"] = $link["href"];
 953                         } elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
 954                                 $data["poco"] = $link["href"];
 955                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
 956                                 $data["notify"] = $link["href"];
 957                         } elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 958                                 $data["pubkey"] = base64_decode($link["href"]);
 959
 960                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 961                                 if (strstr($data["pubkey"], 'RSA ')) {
 962                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 963                                 }
 964                         }
 965                 }
 966
 967                 if (!isset($data["url"]) OR ($hcard_url == "")) {
 968                         return false;
 969                 }
 970
 971                 if (is_array($webfinger["aliases"])) {
 972                         foreach ($webfinger["aliases"] as $alias) {
 973                                 if (normalise_link($alias) != normalise_link($data["url"]) AND ! strstr($alias, "@")) {
 974                                         $data["alias"] = $alias;
 975                                 }
 976                         }
 977                 }
 978
 979                 // Fetch further information from the hcard
 980                 $data = self::pollHcard($hcard_url, $data);
 981
 982                 if (!$data) {
 983                         return false;
 984                 }
 985
 986                 if (isset($data["url"])
 987                         AND isset($data["guid"])
 988                         AND isset($data["baseurl"])
 989                         AND isset($data["pubkey"])
 990                         AND ($hcard_url != "")
 991                 ) {
 992                         $data["network"] = NETWORK_DIASPORA;
 993
 994                         // The Diaspora handle must always be lowercase
 995                         $data["addr"] = strtolower($data["addr"]);
 996
 997                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
 998                         $data["notify"] = $data["baseurl"] . "/receive/users/" . $data["guid"];
 999                         $data["batch"]  = $data["baseurl"] . "/receive/public";
1000                 } else {
1001                         return false;
1002                 }
1003
1004                 return $data;
1005         }
1006
1007         /**
1008          * @brief Check for OStatus contact
1009          *
1010          * @param array $webfinger Webfinger data
1011          *
1012          * @return array OStatus data
1013          */
1014         private function ostatus($webfinger) {
1015                 $data = array();
1016                 if (is_array($webfinger["aliases"])) {
1017                         foreach ($webfinger["aliases"] as $alias) {
1018                                 if (strstr($alias, "@")) {
1019                                         $data["addr"] = str_replace('acct:', '', $alias);
1020                                 }
1021                         }
1022                 }
1023
1024                 if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
1025                         $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
1026                 }
1027                 $pubkey = "";
1028                 foreach ($webfinger["links"] as $link) {
1029                         if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1030                                 AND ($link["type"] == "text/html")
1031                                 AND ($link["href"] != "")
1032                         ) {
1033                                 $data["url"] = $link["href"];
1034                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
1035                                 $data["notify"] = $link["href"];
1036                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
1037                                 $data["poll"] = $link["href"];
1038                         } elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
1039                                 $pubkey = $link["href"];
1040
1041                                 if (substr($pubkey, 0, 5) === 'data:') {
1042                                         if (strstr($pubkey, ',')) {
1043                                                 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
1044                                         } else {
1045                                                 $pubkey = substr($pubkey, 5);
1046                                         }
1047                                 } elseif (normalise_link($pubkey) == 'http://') {
1048                                         $ret = z_fetch_url($pubkey);
1049                                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1050                                                 return false;
1051                                         }
1052                                         $pubkey = $ret['body'];
1053                                 }
1054
1055                                 $key = explode(".", $pubkey);
1056
1057                                 if (sizeof($key) >= 3) {
1058                                         $m = base64url_decode($key[1]);
1059                                         $e = base64url_decode($key[2]);
1060                                         $data["pubkey"] = metopem($m, $e);
1061                                 }
1062                         }
1063                 }
1064
1065                 if (isset($data["notify"]) AND isset($data["pubkey"])
1066                         AND isset($data["poll"])
1067                         AND isset($data["url"])
1068                 ) {
1069                         $data["network"] = NETWORK_OSTATUS;
1070                 } else {
1071                         return false;
1072                 }
1073                 // Fetch all additional data from the feed
1074                 $ret = z_fetch_url($data["poll"]);
1075                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1076                         return false;
1077                 }
1078                 $feed = $ret['body'];
1079                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1080                 if (!$feed_data) {
1081                         return false;
1082                 }
1083                 if ($feed_data["header"]["author-name"] != "") {
1084                         $data["name"] = $feed_data["header"]["author-name"];
1085                 }
1086                 if ($feed_data["header"]["author-nick"] != "") {
1087                         $data["nick"] = $feed_data["header"]["author-nick"];
1088                 }
1089                 if ($feed_data["header"]["author-avatar"] != "") {
1090                         $data["photo"] = self::fixAvatar($feed_data["header"]["author-avatar"], $data["url"]);
1091                 }
1092                 if ($feed_data["header"]["author-id"] != "") {
1093                         $data["alias"] = $feed_data["header"]["author-id"];
1094                 }
1095                 if ($feed_data["header"]["author-location"] != "") {
1096                         $data["location"] = $feed_data["header"]["author-location"];
1097                 }
1098                 if ($feed_data["header"]["author-about"] != "") {
1099                         $data["about"] = $feed_data["header"]["author-about"];
1100                 }
1101                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
1102                 // So we take the value that we just fetched, although the other one worked as well
1103                 if ($feed_data["header"]["author-link"] != "") {
1104                         $data["url"] = $feed_data["header"]["author-link"];
1105                 }
1106                 /// @todo Fetch location and "about" from the feed as well
1107                 return $data;
1108         }
1109
1110         /**
1111          * @brief Fetch data from a pump.io profile page
1112          *
1113          * @param string $profile_link Link to the profile page
1114          *
1115          * @return array profile data
1116          */
1117         private function pumpioProfileData($profile_link) {
1118
1119                 $doc = new DOMDocument();
1120                 if (!@$doc->loadHTMLFile($profile_link)) {
1121                         return false;
1122                 }
1123
1124                 $xpath = new DomXPath($doc);
1125
1126                 $data = array();
1127
1128                 // This is ugly - but pump.io doesn't seem to know a better way for it
1129                 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1130                 $pos = strpos($data["name"], chr(10));
1131                 if ($pos) {
1132                         $data["name"] = trim(substr($data["name"], 0, $pos));
1133                 }
1134
1135                 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1136                 if ($avatar) {
1137                         foreach ($avatar->attributes as $attribute) {
1138                                 if ($attribute->name == "src") {
1139                                         $data["photo"] = trim($attribute->value);
1140                                 }
1141                         }
1142                 }
1143
1144                 $data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
1145                 $data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
1146
1147                 return $data;
1148         }
1149
1150         /**
1151          * @brief Check for pump.io contact
1152          *
1153          * @param array $webfinger Webfinger data
1154          *
1155          * @return array pump.io data
1156          */
1157         private function pumpio($webfinger) {
1158
1159                 $data = array();
1160                 foreach ($webfinger["links"] as $link) {
1161                         if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1162                                 AND ($link["type"] == "text/html")
1163                                 AND ($link["href"] != "")
1164                         ) {
1165                                 $data["url"] = $link["href"];
1166                         } elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != "")) {
1167                                 $data["notify"] = $link["href"];
1168                         } elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != "")) {
1169                                 $data["poll"] = $link["href"];
1170                         } elseif (($link["rel"] == "dialback") AND ($link["href"] != "")) {
1171                                 $data["dialback"] = $link["href"];
1172                         }
1173                 }
1174                 if (isset($data["poll"]) AND isset($data["notify"])
1175                         AND isset($data["dialback"])
1176                         AND isset($data["url"])
1177                 ) {
1178                         // by now we use these fields only for the network type detection
1179                         // So we unset all data that isn't used at the moment
1180                         unset($data["dialback"]);
1181
1182                         $data["network"] = NETWORK_PUMPIO;
1183                 } else {
1184                         return false;
1185                 }
1186
1187                 $profile_data = self::pumpioProfileData($data["url"]);
1188
1189                 if (!$profile_data) {
1190                         return false;
1191                 }
1192
1193                 $data = array_merge($data, $profile_data);
1194
1195                 return $data;
1196         }
1197
1198         /**
1199          * @brief Check page for feed link
1200          *
1201          * @param string $url Page link
1202          *
1203          * @return string feed link
1204          */
1205         private function getFeedLink($url) {
1206                 $doc = new DOMDocument();
1207
1208                 if (!@$doc->loadHTMLFile($url)) {
1209                         return false;
1210                 }
1211
1212                 $xpath = new DomXPath($doc);
1213
1214                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
1215                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
1216                 if (!is_object($feeds)) {
1217                         return false;
1218                 }
1219
1220                 if ($feeds->length == 0) {
1221                         return false;
1222                 }
1223
1224                 $feed_url = "";
1225
1226                 foreach ($feeds as $feed) {
1227                         $attr = array();
1228                         foreach ($feed->attributes as $attribute) {
1229                                 $attr[$attribute->name] = trim($attribute->value);
1230                         }
1231
1232                         if ($feed_url == "") {
1233                                 $feed_url = $attr["href"];
1234                         }
1235                 }
1236
1237                 return $feed_url;
1238         }
1239
1240         /**
1241          * @brief Check for feed contact
1242          *
1243          * @param string $url Profile link
1244          * @param boolean $probe Do a probe if the page contains a feed link
1245          *
1246          * @return array feed data
1247          */
1248         private function feed($url, $probe = true) {
1249                 $ret = z_fetch_url($url);
1250                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1251                         return false;
1252                 }
1253                 $feed = $ret['body'];
1254                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1255
1256                 if (!$feed_data) {
1257                         if (!$probe) {
1258                                 return false;
1259                         }
1260
1261                         $feed_url = self::getFeedLink($url);
1262
1263                         if (!$feed_url) {
1264                                 return false;
1265                         }
1266
1267                         return self::feed($feed_url, false);
1268                 }
1269
1270                 if ($feed_data["header"]["author-name"] != "") {
1271                         $data["name"] = $feed_data["header"]["author-name"];
1272                 }
1273
1274                 if ($feed_data["header"]["author-nick"] != "") {
1275                         $data["nick"] = $feed_data["header"]["author-nick"];
1276                 }
1277
1278                 if ($feed_data["header"]["author-avatar"] != "") {
1279                         $data["photo"] = $feed_data["header"]["author-avatar"];
1280                 }
1281
1282                 if ($feed_data["header"]["author-id"] != "") {
1283                         $data["alias"] = $feed_data["header"]["author-id"];
1284                 }
1285
1286                 $data["url"] = $url;
1287                 $data["poll"] = $url;
1288
1289                 if ($feed_data["header"]["author-link"] != "") {
1290                         $data["baseurl"] = $feed_data["header"]["author-link"];
1291                 } else {
1292                         $data["baseurl"] = $data["url"];
1293                 }
1294
1295                 $data["network"] = NETWORK_FEED;
1296
1297                 return $data;
1298         }
1299
1300         /**
1301          * @brief Check for mail contact
1302          *
1303          * @param string $uri Profile link
1304          * @param integer $uid User ID
1305          *
1306          * @return array mail data
1307          */
1308         private function mail($uri, $uid) {
1309
1310                 if (!validate_email($uri)) {
1311                         return false;
1312                 }
1313
1314                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
1315
1316                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
1317
1318                 if (dbm::is_result($x) && dbm::is_result($r)) {
1319                         $mailbox = construct_mailbox_name($r[0]);
1320                         $password = '';
1321                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password, $x[0]['prvkey']);
1322                         $mbox = email_connect($mailbox, $r[0]['user'], $password);
1323                         if (!mbox) {
1324                                 return false;
1325                         }
1326                 }
1327
1328                 $msgs = email_poll($mbox, $uri);
1329                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
1330
1331                 if (!count($msgs)) {
1332                         return false;
1333                 }
1334
1335                 $phost = substr($uri, strpos($uri, '@') + 1);
1336
1337                 $data = array();
1338                 $data["addr"]    = $uri;
1339                 $data["network"] = NETWORK_MAIL;
1340                 $data["name"]    = substr($uri, 0, strpos($uri, '@'));
1341                 $data["nick"]    = $data["name"];
1342                 $data["photo"]   = avatar_img($uri);
1343                 $data["url"]     = 'http://'.$phost."/".$data["nick"];
1344                 $data["notify"]  = 'smtp '.random_string();
1345                 $data["poll"]    = 'email '.random_string();
1346
1347                 $x = email_msg_meta($mbox, $msgs[0]);
1348                 if (stristr($x[0]->from, $uri)) {
1349                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1350                 } elseif (stristr($x[0]->to, $uri)) {
1351                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1352                 }
1353                 if (isset($adr)) {
1354                         foreach ($adr as $feadr) {
1355                                 if ((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1356                                         &&(strcasecmp($feadr->host, $phost) == 0)
1357                                         && (strlen($feadr->personal))
1358                                 ) {
1359                                         $personal = imap_mime_header_decode($feadr->personal);
1360                                         $data["name"] = "";
1361                                         foreach ($personal as $perspart) {
1362                                                 if ($perspart->charset != "default") {
1363                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1364                                                 } else {
1365                                                         $data["name"] .= $perspart->text;
1366                                                 }
1367                                         }
1368
1369                                         $data["name"] = notags($data["name"]);
1370                                 }
1371                         }
1372                 }
1373                 imap_close($mbox);
1374
1375                 return $data;
1376         }
1377
1378         /**
1379          * @brief Mix two paths together to possibly fix missing parts
1380          *
1381          * @param string $avatar Path to the avatar
1382          * @param string $base Another path that is hopefully complete
1383          *
1384          * @return string fixed avatar path
1385          */
1386         public static function fixAvatar($avatar, $base) {
1387                 $base_parts = parse_url($base);
1388
1389                 // Remove all parts that could create a problem
1390                 unset($base_parts['path']);
1391                 unset($base_parts['query']);
1392                 unset($base_parts['fragment']);
1393
1394                 $avatar_parts = parse_url($avatar);
1395
1396                 // Now we mix them
1397                 $parts = array_merge($base_parts, $avatar_parts);
1398
1399                 // And put them together again
1400                 $scheme   = isset($parts['scheme'])   ? $parts['scheme'] . '://' : '';
1401                 $host     = isset($parts['host'])     ? $parts['host']           : '';
1402                 $port     = isset($parts['port'])     ? ':' . $parts['port']     : '';
1403                 $path     = isset($parts['path'])     ? $parts['path']           : '';
1404                 $query    = isset($parts['query'])    ? '?' . $parts['query']    : '';
1405                 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
1406
1407                 $fixed = $scheme.$host.$port.$path.$query.$fragment;
1408
1409                 logger('Base: '.$base.' - Avatar: '.$avatar.' - Fixed: '.$fixed, LOGGER_DATA);
1410
1411                 return $fixed;
1412         }
1413 }