include/Probe.php

   1 <?php
   2 /**
   3  * @file include/Probe.php
   4  * @brief Functions for probing URL
   5  *
   6  */
   7
   8 use Friendica\App;
   9 use Friendica\Core\Config;
  10 use Friendica\Core\PConfig;
  11
  12 require_once("include/feed.php");
  13 require_once('include/email.php');
  14 require_once('include/network.php');
  15
  16 /**
  17  * @brief This class contain functions for probing URL
  18  *
  19  */
  20 class Probe {
  21
  22         private static $baseurl;
  23
  24         /**
  25          * @brief Rearrange the array so that it always has the same order
  26          *
  27          * @param array $data Unordered data
  28          *
  29          * @return array Ordered data
  30          */
  31         private function rearrange_data($data) {
  32                 $fields = array("name", "nick", "guid", "url", "addr", "alias",
  33                                 "photo", "community", "keywords", "location", "about",
  34                                 "batch", "notify", "poll", "request", "confirm", "poco",
  35                                 "priority", "network", "pubkey", "baseurl");
  36
  37                 $newdata = array();
  38                 foreach ($fields AS $field)
  39                         if (isset($data[$field]))
  40                                 $newdata[$field] = $data[$field];
  41                         else
  42                                 $newdata[$field] = "";
  43
  44                 // We don't use the "priority" field anymore and replace it with a dummy.
  45                 $newdata["priority"] = 0;
  46
  47                 return $newdata;
  48         }
  49
  50         /**
  51          * @brief Probes for XRD data
  52          *
  53          * @return array
  54          *      'lrdd' => Link to LRDD endpoint
  55          *      'lrdd-xml' => Link to LRDD endpoint in XML format
  56          *      'lrdd-json' => Link to LRDD endpoint in JSON format
  57          */
  58         private function xrd($host) {
  59
  60                 // Reset the static variable
  61                 self::$baseurl = '';
  62
  63                 $ssl_url = "https://".$host."/.well-known/host-meta";
  64                 $url = "http://".$host."/.well-known/host-meta";
  65
  66                 $xrd_timeout = Config::get('system','xrd_timeout', 20);
  67                 $redirects = 0;
  68
  69                 $ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  70                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  71                         return false;
  72                 }
  73                 $xml = $ret['body'];
  74
  75                 $xrd = parse_xml_string($xml, false);
  76
  77                 if (!is_object($xrd)) {
  78                         $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  79                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  80                                 return false;
  81                         }
  82                         $xml = $ret['body'];
  83                         $xrd = parse_xml_string($xml, false);
  84                 }
  85                 if (!is_object($xrd))
  86                         return false;
  87
  88                 $links = xml::element_to_array($xrd);
  89                 if (!isset($links["xrd"]["link"]))
  90                         return false;
  91
  92                 $xrd_data = array();
  93
  94                 foreach ($links["xrd"]["link"] AS $value => $link) {
  95                         if (isset($link["@attributes"]))
  96                                 $attributes = $link["@attributes"];
  97                         elseif ($value == "@attributes")
  98                                 $attributes = $link;
  99                         else
 100                                 continue;
 101
 102                         if (($attributes["rel"] == "lrdd") AND
 103                                 ($attributes["type"] == "application/xrd+xml"))
 104                                 $xrd_data["lrdd-xml"] = $attributes["template"];
 105                         elseif (($attributes["rel"] == "lrdd") AND
 106                                 ($attributes["type"] == "application/json"))
 107                                 $xrd_data["lrdd-json"] = $attributes["template"];
 108                         elseif ($attributes["rel"] == "lrdd")
 109                                 $xrd_data["lrdd"] = $attributes["template"];
 110                 }
 111
 112                 self::$baseurl = "http://".$host;
 113
 114                 return $xrd_data;
 115         }
 116
 117         /**
 118          * @brief Perform Webfinger lookup and return DFRN data
 119          *
 120          * Given an email style address, perform webfinger lookup and
 121          * return the resulting DFRN profile URL, or if no DFRN profile URL
 122          * is located, returns an OStatus subscription template (prefixed
 123          * with the string 'stat:' to identify it as on OStatus template).
 124          * If this isn't an email style address just return $webbie.
 125          * Return an empty string if email-style addresses but webfinger fails,
 126          * or if the resultant personal XRD doesn't contain a supported
 127          * subscription/friend-request attribute.
 128          *
 129          * amended 7/9/2011 to return an hcard which could save potentially loading
 130          * a lengthy content page to scrape dfrn attributes
 131          *
 132          * @param string $webbie Address that should be probed
 133          * @param string $hcard Link to the hcard - is returned by reference
 134          *
 135          * @return string profile link
 136          */
 137
 138         public static function webfinger_dfrn($webbie, &$hcard) {
 139
 140                 $profile_link = '';
 141
 142                 $links = self::lrdd($webbie);
 143                 logger('webfinger_dfrn: '.$webbie.':'.print_r($links,true), LOGGER_DATA);
 144                 if (count($links)) {
 145                         foreach ($links as $link) {
 146                                 if ($link['@attributes']['rel'] === NAMESPACE_DFRN)
 147                                         $profile_link = $link['@attributes']['href'];
 148                                 if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == ""))
 149                                         $profile_link = 'stat:'.$link['@attributes']['template'];
 150                                 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
 151                                         $hcard = $link['@attributes']['href'];
 152                         }
 153                 }
 154                 return $profile_link;
 155         }
 156
 157         /**
 158          * @brief Check an URI for LRDD data
 159          *
 160          * this is a replacement for the "lrdd" function in include/network.php.
 161          * It isn't used in this class and has some redundancies in the code.
 162          * When time comes we can check the existing calls for "lrdd" if we can rework them.
 163          *
 164          * @param string $uri Address that should be probed
 165          *
 166          * @return array uri data
 167          */
 168         public static function lrdd($uri) {
 169
 170                 $lrdd = self::xrd($uri);
 171
 172                 if (!$lrdd) {
 173                         $parts = @parse_url($uri);
 174                         if (!$parts)
 175                                 return array();
 176
 177                         $host = $parts["host"];
 178                         if (isset($parts["port"])) {
 179                                 $host .= ':'.$parts["port"];
 180                         }
 181
 182                         $path_parts = explode("/", trim($parts["path"], "/"));
 183
 184                         $nick = array_pop($path_parts);
 185
 186                         do {
 187                                 $lrdd = self::xrd($host);
 188                                 $host .= "/".array_shift($path_parts);
 189                         } while (!$lrdd AND (sizeof($path_parts) > 0));
 190                 }
 191
 192                 if (!$lrdd)
 193                         return array();
 194
 195                 foreach ($lrdd AS $key => $link) {
 196                         if ($webfinger)
 197                                 continue;
 198
 199                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json")))
 200                                 continue;
 201
 202                         $path = str_replace('{uri}', urlencode($uri), $link);
 203                         $webfinger = self::webfinger($path);
 204
 205                         if (!$webfinger AND (strstr($uri, "@"))) {
 206                                 $path = str_replace('{uri}', urlencode("acct:".$uri), $link);
 207                                 $webfinger = self::webfinger($path);
 208                         }
 209
 210                         // Special treatment for Mastodon
 211                         // Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 212                         // But the webfinger for this format fails.
 213                         if (!$webfinger AND isset($nick)) {
 214                                 // Mastodon uses a "@" as prefix for usernames in their url format
 215                                 $nick = ltrim($nick, '@');
 216
 217                                 $addr = $nick."@".$host;
 218
 219                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 220                                 $webfinger = self::webfinger($path);
 221                         }
 222                 }
 223
 224                 if (!is_array($webfinger["links"]))
 225                         return false;
 226
 227                 $data = array();
 228
 229                 foreach ($webfinger["links"] AS $link)
 230                         $data[] = array("@attributes" => $link);
 231
 232                 if (is_array($webfinger["aliases"]))
 233                         foreach ($webfinger["aliases"] AS $alias)
 234                                 $data[] = array("@attributes" =>
 235                                                         array("rel" => "alias",
 236                                                                 "href" => $alias));
 237
 238                 return $data;
 239         }
 240
 241         /**
 242          * @brief Fetch information (protocol endpoints and user information) about a given uri
 243          *
 244          * @param string $uri Address that should be probed
 245          * @param string $network Test for this specific network
 246          * @param integer $uid User ID for the probe (only used for mails)
 247          * @param boolean $cache Use cached values?
 248          *
 249          * @return array uri data
 250          */
 251         public static function uri($uri, $network = "", $uid = 0, $cache = true) {
 252
 253                 if ($cache) {
 254                         $result = Cache::get("probe_url:".$network.":".$uri);
 255                         if (!is_null($result)) {
 256                                 return $result;
 257                         }
 258                 }
 259
 260                 if ($uid == 0)
 261                         $uid = local_user();
 262
 263                 $data = self::detect($uri, $network, $uid);
 264
 265                 if (!isset($data["url"]))
 266                         $data["url"] = $uri;
 267
 268                 if ($data["photo"] != "")
 269                         $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 270                 else
 271                         $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 272
 273                 if (!isset($data["name"]) OR ($data["name"] == "")) {
 274                         if (isset($data["nick"]))
 275                                 $data["name"] = $data["nick"];
 276
 277                         if ($data["name"] == "")
 278                                 $data["name"] = $data["url"];
 279                 }
 280
 281                 if (!isset($data["nick"]) OR ($data["nick"] == "")) {
 282                         $data["nick"] = strtolower($data["name"]);
 283
 284                         if (strpos($data['nick'], ' '))
 285                                 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
 286                 }
 287
 288                 if (self::$baseurl != "") {
 289                         $data["baseurl"] = self::$baseurl;
 290                 }
 291
 292                 if (!isset($data["network"])) {
 293                         $data["network"] = NETWORK_PHANTOM;
 294                 }
 295
 296                 $data = self::rearrange_data($data);
 297
 298                 // Only store into the cache if the value seems to be valid
 299                 if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
 300                         Cache::set("probe_url:".$network.":".$uri, $data, CACHE_DAY);
 301
 302                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 303                         /// The biggest problem is the avatar picture that could have a reduced image size.
 304                         /// It should only be updated if the existing picture isn't existing anymore.
 305                         if (($data['network'] != NETWORK_FEED) AND ($mode == PROBE_NORMAL) AND
 306                                 $data["name"] AND $data["nick"] AND $data["url"] AND $data["addr"] AND $data["poll"])
 307                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 308                                                 `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
 309                                         WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
 310                                         dbesc($data["name"]),
 311                                         dbesc($data["nick"]),
 312                                         dbesc($data["url"]),
 313                                         dbesc($data["addr"]),
 314                                         dbesc($data["notify"]),
 315                                         dbesc($data["poll"]),
 316                                         dbesc($data["alias"]),
 317                                         dbesc(datetime_convert()),
 318                                         dbesc(normalise_link($data['url']))
 319                         );
 320                 }
 321
 322                 return $data;
 323         }
 324
 325         /**
 326          * @brief Fetch information (protocol endpoints and user information) about a given uri
 327          *
 328          * This function is only called by the "uri" function that adds caching and rearranging of data.
 329          *
 330          * @param string $uri Address that should be probed
 331          * @param string $network Test for this specific network
 332          * @param integer $uid User ID for the probe (only used for mails)
 333          *
 334          * @return array uri data
 335          */
 336         private function detect($uri, $network, $uid) {
 337                 $parts = parse_url($uri);
 338
 339                 if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
 340
 341                         $host = $parts["host"];
 342                         if (isset($parts["port"])) {
 343                                 $host .= ':'.$parts["port"];
 344                         }
 345
 346                         if ($host == 'twitter.com') {
 347                                 return array("network" => NETWORK_TWITTER);
 348                         }
 349                         $lrdd = self::xrd($host);
 350
 351                         $path_parts = explode("/", trim($parts["path"], "/"));
 352
 353                         while (!$lrdd AND (sizeof($path_parts) > 1)) {
 354                                 $host .= "/".array_shift($path_parts);
 355                                 $lrdd = self::xrd($host);
 356                         }
 357                         if (!$lrdd) {
 358                                 return self::feed($uri);
 359                         }
 360                         $nick = array_pop($path_parts);
 361
 362                         // Mastodon uses a "@" as prefix for usernames in their url format
 363                         $nick = ltrim($nick, '@');
 364
 365                         $addr = $nick."@".$host;
 366                 } elseif (strstr($uri, '@')) {
 367                         // If the URI starts with "mailto:" then jump directly to the mail detection
 368                         if (strpos($url,'mailto:') !== false) {
 369                                 $uri = str_replace('mailto:', '', $url);
 370                                 return self::mail($uri, $uid);
 371                         }
 372
 373                         if ($network == NETWORK_MAIL) {
 374                                 return self::mail($uri, $uid);
 375                         }
 376                         // Remove "acct:" from the URI
 377                         $uri = str_replace('acct:', '', $uri);
 378
 379                         $host = substr($uri,strpos($uri, '@') + 1);
 380                         $nick = substr($uri,0, strpos($uri, '@'));
 381
 382                         if (strpos($uri, '@twitter.com')) {
 383                                 return array("network" => NETWORK_TWITTER);
 384                         }
 385                         $lrdd = self::xrd($host);
 386
 387                         if (!$lrdd) {
 388                                 return self::mail($uri, $uid);
 389                         }
 390                         $addr = $uri;
 391                 } else {
 392                         return false;
 393                 }
 394
 395                 $webfinger = false;
 396
 397                 /// @todo Do we need the prefix "acct:" or "acct://"?
 398
 399                 foreach ($lrdd AS $key => $link) {
 400                         if ($webfinger) {
 401                                 continue;
 402                         }
 403                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 404                                 continue;
 405                         }
 406                         // At first try it with the given uri
 407                         $path = str_replace('{uri}', urlencode($uri), $link);
 408                         $webfinger = self::webfinger($path);
 409
 410                         // We cannot be sure that the detected address was correct, so we don't use the values
 411                         if ($webfinger AND ($uri != $addr)) {
 412                                 $nick = "";
 413                                 $addr = "";
 414                         }
 415
 416                         // Try webfinger with the address (user@domain.tld)
 417                         if (!$webfinger) {
 418                                 $path = str_replace('{uri}', urlencode($addr), $link);
 419                                 $webfinger = self::webfinger($path);
 420                         }
 421
 422                         // Mastodon needs to have it with "acct:"
 423                         if (!$webfinger) {
 424                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 425                                 $webfinger = self::webfinger($path);
 426                         }
 427                 }
 428                 if (!$webfinger) {
 429                         return self::feed($uri);
 430                 }
 431
 432                 $result = false;
 433
 434                 logger("Probing ".$uri, LOGGER_DEBUG);
 435
 436                 if (in_array($network, array("", NETWORK_DFRN)))
 437                         $result = self::dfrn($webfinger);
 438                 if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA))
 439                         $result = self::diaspora($webfinger);
 440                 if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS))
 441                         $result = self::ostatus($webfinger);
 442                 if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO))
 443                         $result = self::pumpio($webfinger);
 444                 if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED))
 445                         $result = self::feed($uri);
 446                 else {
 447                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 448                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 449                         if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != ""))
 450                                 $result["nick"] = $nick;
 451
 452                         if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != ""))
 453                                 $result["addr"] = $addr;
 454                 }
 455
 456                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 457
 458                 if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
 459                         $pos = strpos($result["url"], $host);
 460                         if ($pos)
 461                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 462                 }
 463
 464                 return $result;
 465         }
 466
 467         /**
 468          * @brief Perform a webfinger request.
 469          *
 470          * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
 471          *
 472          * @param string $url Address that should be probed
 473          *
 474          * @return array webfinger data
 475          */
 476         private function webfinger($url) {
 477
 478                 $xrd_timeout = Config::get('system','xrd_timeout', 20);
 479                 $redirects = 0;
 480
 481                 $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
 482                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 483                         return false;
 484                 }
 485                 $data = $ret['body'];
 486
 487                 $xrd = parse_xml_string($data, false);
 488
 489                 if (!is_object($xrd)) {
 490                         // If it is not XML, maybe it is JSON
 491                         $webfinger = json_decode($data, true);
 492
 493                         if (!isset($webfinger["links"]))
 494                                 return false;
 495
 496                         return $webfinger;
 497                 }
 498
 499                 $xrd_arr = xml::element_to_array($xrd);
 500                 if (!isset($xrd_arr["xrd"]["link"]))
 501                         return false;
 502
 503                 $webfinger = array();
 504
 505                 if (isset($xrd_arr["xrd"]["subject"]))
 506                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 507
 508                 if (isset($xrd_arr["xrd"]["alias"]))
 509                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 510
 511                 $webfinger["links"] = array();
 512
 513                 foreach ($xrd_arr["xrd"]["link"] AS $value => $data) {
 514                         if (isset($data["@attributes"]))
 515                                 $attributes = $data["@attributes"];
 516                         elseif ($value == "@attributes")
 517                                 $attributes = $data;
 518                         else
 519                                 continue;
 520
 521                         $webfinger["links"][] = $attributes;
 522                 }
 523                 return $webfinger;
 524         }
 525
 526         /**
 527          * @brief Poll the Friendica specific noscrape page.
 528          *
 529          * "noscrape" is a faster alternative to fetch the data from the hcard.
 530          * This functionality was originally created for the directory.
 531          *
 532          * @param string $noscrape Link to the noscrape page
 533          * @param array $data The already fetched data
 534          *
 535          * @return array noscrape data
 536          */
 537         private function poll_noscrape($noscrape, $data) {
 538                 $ret = z_fetch_url($noscrape);
 539                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 540                         return false;
 541                 }
 542                 $content = $ret['body'];
 543                 if (!$content) {
 544                         return false;
 545                 }
 546
 547                 $json = json_decode($content, true);
 548                 if (!is_array($json))
 549                         return false;
 550
 551                 if (isset($json["fn"]))
 552                         $data["name"] = $json["fn"];
 553
 554                 if (isset($json["addr"]))
 555                         $data["addr"] = $json["addr"];
 556
 557                 if (isset($json["nick"]))
 558                         $data["nick"] = $json["nick"];
 559
 560                 if (isset($json["comm"]))
 561                         $data["community"] = $json["comm"];
 562
 563                 if (isset($json["tags"])) {
 564                         $keywords = implode(" ", $json["tags"]);
 565                         if ($keywords != "")
 566                                 $data["keywords"] = $keywords;
 567                 }
 568
 569                 $location = formatted_location($json);
 570                 if ($location)
 571                         $data["location"] = $location;
 572
 573                 if (isset($json["about"]))
 574                         $data["about"] = $json["about"];
 575
 576                 if (isset($json["key"]))
 577                         $data["pubkey"] = $json["key"];
 578
 579                 if (isset($json["photo"]))
 580                         $data["photo"] = $json["photo"];
 581
 582                 if (isset($json["dfrn-request"]))
 583                         $data["request"] = $json["dfrn-request"];
 584
 585                 if (isset($json["dfrn-confirm"]))
 586                         $data["confirm"] = $json["dfrn-confirm"];
 587
 588                 if (isset($json["dfrn-notify"]))
 589                         $data["notify"] = $json["dfrn-notify"];
 590
 591                 if (isset($json["dfrn-poll"]))
 592                         $data["poll"] = $json["dfrn-poll"];
 593
 594                 return $data;
 595         }
 596
 597         /**
 598          * @brief Check for valid DFRN data
 599          *
 600          * @param array $data DFRN data
 601          *
 602          * @return int Number of errors
 603          */
 604         public static function valid_dfrn($data) {
 605                 $errors = 0;
 606                 if(!isset($data['key']))
 607                         $errors ++;
 608                 if(!isset($data['dfrn-request']))
 609                         $errors ++;
 610                 if(!isset($data['dfrn-confirm']))
 611                         $errors ++;
 612                 if(!isset($data['dfrn-notify']))
 613                         $errors ++;
 614                 if(!isset($data['dfrn-poll']))
 615                         $errors ++;
 616                 return $errors;
 617         }
 618
 619         /**
 620          * @brief Fetch data from a DFRN profile page and via "noscrape"
 621          *
 622          * @param string $profile Link to the profile page
 623          *
 624          * @return array profile data
 625          */
 626         public static function profile($profile) {
 627
 628                 $data = array();
 629
 630                 logger("Check profile ".$profile, LOGGER_DEBUG);
 631
 632                 // Fetch data via noscrape - this is faster
 633                 $noscrape = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile);
 634                 $data = self::poll_noscrape($noscrape, $data);
 635
 636                 if (!isset($data["notify"]) OR !isset($data["confirm"]) OR
 637                         !isset($data["request"]) OR !isset($data["poll"]) OR
 638                         !isset($data["poco"]) OR !isset($data["name"]) OR
 639                         !isset($data["photo"]))
 640                         $data = self::poll_hcard($profile, $data, true);
 641
 642                 $prof_data = array();
 643                 $prof_data["addr"] = $data["addr"];
 644                 $prof_data["nick"] = $data["nick"];
 645                 $prof_data["dfrn-request"] = $data["request"];
 646                 $prof_data["dfrn-confirm"] = $data["confirm"];
 647                 $prof_data["dfrn-notify"] = $data["notify"];
 648                 $prof_data["dfrn-poll"] = $data["poll"];
 649                 $prof_data["dfrn-poco"] = $data["poco"];
 650                 $prof_data["photo"] = $data["photo"];
 651                 $prof_data["fn"] = $data["name"];
 652                 $prof_data["key"] = $data["pubkey"];
 653
 654                 logger("Result for profile ".$profile.": ".print_r($prof_data, true), LOGGER_DEBUG);
 655
 656                 return $prof_data;
 657         }
 658
 659         /**
 660          * @brief Check for DFRN contact
 661          *
 662          * @param array $webfinger Webfinger data
 663          *
 664          * @return array DFRN data
 665          */
 666         private function dfrn($webfinger) {
 667
 668                 $hcard = "";
 669                 $data = array();
 670                 foreach ($webfinger["links"] AS $link) {
 671                         if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != ""))
 672                                 $data["network"] = NETWORK_DFRN;
 673                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 674                                 $data["poll"] = $link["href"];
 675                         elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 676                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 677                                 $data["url"] = $link["href"];
 678                         elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
 679                                 $hcard = $link["href"];
 680                         elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
 681                                 $data["poco"] = $link["href"];
 682                         elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != ""))
 683                                 $data["photo"] = $link["href"];
 684
 685                         elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
 686                                 $data["baseurl"] = trim($link["href"], '/');
 687                         elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
 688                                 $data["guid"] = $link["href"];
 689                         elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 690                                 $data["pubkey"] = base64_decode($link["href"]);
 691
 692                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 693                                 if (strstr($data["pubkey"], 'RSA '))
 694                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 695                         }
 696                 }
 697
 698                 if (!isset($data["network"]) OR ($hcard == ""))
 699                         return false;
 700
 701                 // Fetch data via noscrape - this is faster
 702                 $noscrape = str_replace("/hcard/", "/noscrape/", $hcard);
 703                 $data = self::poll_noscrape($noscrape, $data);
 704
 705                 if (isset($data["notify"]) AND isset($data["confirm"]) AND isset($data["request"]) AND
 706                         isset($data["poll"]) AND isset($data["name"]) AND isset($data["photo"]))
 707                         return $data;
 708
 709                 $data = self::poll_hcard($hcard, $data, true);
 710
 711                 return $data;
 712         }
 713
 714         /**
 715          * @brief Poll the hcard page (Diaspora and Friendica specific)
 716          *
 717          * @param string $hcard Link to the hcard page
 718          * @param array $data The already fetched data
 719          * @param boolean $dfrn Poll DFRN specific data
 720          *
 721          * @return array hcard data
 722          */
 723         private function poll_hcard($hcard, $data, $dfrn = false) {
 724                 $ret = z_fetch_url($hcard);
 725                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 726                         return false;
 727                 }
 728                 $content = $ret['body'];
 729                 if (!$content) {
 730                         return false;
 731                 }
 732
 733                 $doc = new DOMDocument();
 734                 if (!@$doc->loadHTML($content))
 735                         return false;
 736
 737                 $xpath = new DomXPath($doc);
 738
 739                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
 740                 if (!is_object($vcards))
 741                         return false;
 742
 743                 if ($vcards->length > 0) {
 744                         $vcard = $vcards->item(0);
 745
 746                         // We have to discard the guid from the hcard in favour of the guid from lrdd
 747                         // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 748                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
 749                         if (($search->length > 0) AND ($data["guid"] == ""))
 750                                 $data["guid"] = $search->item(0)->nodeValue;
 751
 752                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
 753                         if ($search->length > 0)
 754                                 $data["nick"] = $search->item(0)->nodeValue;
 755
 756                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
 757                         if ($search->length > 0)
 758                                 $data["name"] = $search->item(0)->nodeValue;
 759
 760                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 761                         if ($search->length > 0)
 762                                 $data["searchable"] = $search->item(0)->nodeValue;
 763
 764                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
 765                         if ($search->length > 0) {
 766                                 $data["pubkey"] = $search->item(0)->nodeValue;
 767                                 if (strstr($data["pubkey"], 'RSA '))
 768                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 769                         }
 770
 771                         $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
 772                         if ($search->length > 0)
 773                                 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
 774                 }
 775
 776                 $avatar = array();
 777                 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 778                 foreach ($photos AS $photo) {
 779                         $attr = array();
 780                         foreach ($photo->attributes as $attribute) {
 781                                 $attr[$attribute->name] = trim($attribute->value);
 782                         }
 783
 784                         if (isset($attr["src"]) AND isset($attr["width"])) {
 785                                 $avatar[$attr["width"]] = $attr["src"];
 786                         }
 787
 788                         // We don't have a width. So we just take everything that we got.
 789                         // This is a Hubzilla workaround which doesn't send a width.
 790                         if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
 791                                 $avatar[] = $attr["src"];
 792                         }
 793                 }
 794
 795                 if (sizeof($avatar)) {
 796                         ksort($avatar);
 797                         $data["photo"] = self::fix_avatar(array_pop($avatar), $data["baseurl"]);
 798                 }
 799
 800                 if ($dfrn) {
 801                         // Poll DFRN specific data
 802                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
 803                         if ($search->length > 0) {
 804                                 foreach ($search AS $link) {
 805                                         //$data["request"] = $search->item(0)->nodeValue;
 806                                         $attr = array();
 807                                         foreach ($link->attributes as $attribute)
 808                                                 $attr[$attribute->name] = trim($attribute->value);
 809
 810                                         $data[substr($attr["rel"], 5)] = $attr["href"];
 811                                 }
 812                         }
 813
 814                         // Older Friendica versions had used the "uid" field differently than newer versions
 815                         if ($data["nick"] == $data["guid"])
 816                                 unset($data["guid"]);
 817                 }
 818
 819
 820                 return $data;
 821         }
 822
 823         /**
 824          * @brief Check for Diaspora contact
 825          *
 826          * @param array $webfinger Webfinger data
 827          *
 828          * @return array Diaspora data
 829          */
 830         private function diaspora($webfinger) {
 831
 832                 $hcard = "";
 833                 $data = array();
 834                 foreach ($webfinger["links"] AS $link) {
 835                         if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
 836                                 $hcard = $link["href"];
 837                         elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
 838                                 $data["baseurl"] = trim($link["href"], '/');
 839                         elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
 840                                 $data["guid"] = $link["href"];
 841                         elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 842                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 843                                 $data["url"] = $link["href"];
 844                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 845                                 $data["poll"] = $link["href"];
 846                         elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
 847                                 $data["poco"] = $link["href"];
 848                         elseif (($link["rel"] == "salmon") AND ($link["href"] != ""))
 849                                 $data["notify"] = $link["href"];
 850                         elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 851                                 $data["pubkey"] = base64_decode($link["href"]);
 852
 853                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 854                                 if (strstr($data["pubkey"], 'RSA '))
 855                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 856                         }
 857                 }
 858
 859                 if (!isset($data["url"]) OR ($hcard == ""))
 860                         return false;
 861
 862                 if (is_array($webfinger["aliases"]))
 863                         foreach ($webfinger["aliases"] AS $alias)
 864                                 if (normalise_link($alias) != normalise_link($data["url"]) AND !strstr($alias, "@"))
 865                                         $data["alias"] = $alias;
 866
 867                 // Fetch further information from the hcard
 868                 $data = self::poll_hcard($hcard, $data);
 869
 870                 if (!$data)
 871                         return false;
 872
 873                 if (isset($data["url"]) AND isset($data["guid"]) AND isset($data["baseurl"]) AND
 874                         isset($data["pubkey"]) AND ($hcard != "")) {
 875                         $data["network"] = NETWORK_DIASPORA;
 876
 877                         // The Diaspora handle must always be lowercase
 878                         $data["addr"] = strtolower($data["addr"]);
 879
 880                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
 881                         $data["notify"] = $data["baseurl"]."/receive/users/".$data["guid"];
 882                         $data["batch"] = $data["baseurl"]."/receive/public";
 883                 } else
 884                         return false;
 885
 886                 return $data;
 887         }
 888
 889         /**
 890          * @brief Check for OStatus contact
 891          *
 892          * @param array $webfinger Webfinger data
 893          *
 894          * @return array OStatus data
 895          */
 896         private function ostatus($webfinger) {
 897                 $data = array();
 898                 if (is_array($webfinger["aliases"])) {
 899                         foreach ($webfinger["aliases"] AS $alias) {
 900                                 if (strstr($alias, "@")) {
 901                                         $data["addr"] = str_replace('acct:', '', $alias);
 902                                 }
 903                         }
 904                 }
 905
 906                 if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
 907                         $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
 908                 }
 909                 $pubkey = "";
 910                 foreach ($webfinger["links"] AS $link) {
 911                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 912                                 ($link["type"] == "text/html") AND ($link["href"] != "")) {
 913                                 $data["url"] = $link["href"];
 914                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
 915                                 $data["notify"] = $link["href"];
 916                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 917                                 $data["poll"] = $link["href"];
 918                         } elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
 919                                 $pubkey = $link["href"];
 920
 921                                 if (substr($pubkey, 0, 5) === 'data:') {
 922                                         if (strstr($pubkey, ',')) {
 923                                                 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
 924                                         } else {
 925                                                 $pubkey = substr($pubkey, 5);
 926                                         }
 927                                 } elseif (normalise_link($pubkey) == 'http://') {
 928                                         $ret = z_fetch_url($pubkey);
 929                                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 930                                                 return false;
 931                                         }
 932                                         $pubkey = $ret['body'];
 933                                 }
 934
 935                                 $key = explode(".", $pubkey);
 936
 937                                 if (sizeof($key) >= 3) {
 938                                         $m = base64url_decode($key[1]);
 939                                         $e = base64url_decode($key[2]);
 940                                         $data["pubkey"] = metopem($m,$e);
 941                                 }
 942                         }
 943                 }
 944
 945                 if (isset($data["notify"]) AND isset($data["pubkey"]) AND
 946                         isset($data["poll"]) AND isset($data["url"])) {
 947                         $data["network"] = NETWORK_OSTATUS;
 948                 } else {
 949                         return false;
 950                 }
 951                 // Fetch all additional data from the feed
 952                 $ret = z_fetch_url($data["poll"]);
 953                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 954                         return false;
 955                 }
 956                 $feed = $ret['body'];
 957                 $feed_data = feed_import($feed,$dummy1,$dummy2, $dummy3, true);
 958                 if (!$feed_data) {
 959                         return false;
 960                 }
 961                 if ($feed_data["header"]["author-name"] != "") {
 962                         $data["name"] = $feed_data["header"]["author-name"];
 963                 }
 964                 if ($feed_data["header"]["author-nick"] != "") {
 965                         $data["nick"] = $feed_data["header"]["author-nick"];
 966                 }
 967                 if ($feed_data["header"]["author-avatar"] != "") {
 968                         $data["photo"] = self::fix_avatar($feed_data["header"]["author-avatar"], $data["url"]);
 969                 }
 970                 if ($feed_data["header"]["author-id"] != "") {
 971                         $data["alias"] = $feed_data["header"]["author-id"];
 972                 }
 973                 if ($feed_data["header"]["author-location"] != "") {
 974                         $data["location"] = $feed_data["header"]["author-location"];
 975                 }
 976                 if ($feed_data["header"]["author-about"] != "") {
 977                         $data["about"] = $feed_data["header"]["author-about"];
 978                 }
 979                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
 980                 // So we take the value that we just fetched, although the other one worked as well
 981                 if ($feed_data["header"]["author-link"] != "") {
 982                         $data["url"] = $feed_data["header"]["author-link"];
 983                 }
 984                 /// @todo Fetch location and "about" from the feed as well
 985                 return $data;
 986         }
 987
 988         /**
 989          * @brief Fetch data from a pump.io profile page
 990          *
 991          * @param string $profile Link to the profile page
 992          *
 993          * @return array profile data
 994          */
 995         private function pumpio_profile_data($profile) {
 996
 997                 $doc = new DOMDocument();
 998                 if (!@$doc->loadHTMLFile($profile))
 999                         return false;
1000
1001                 $xpath = new DomXPath($doc);
1002
1003                 $data = array();
1004
1005                 // This is ugly - but pump.io doesn't seem to know a better way for it
1006                 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1007                 $pos = strpos($data["name"], chr(10));
1008                 if ($pos)
1009                         $data["name"] = trim(substr($data["name"], 0, $pos));
1010
1011                 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1012                 if ($avatar)
1013                         foreach ($avatar->attributes as $attribute)
1014                                 if ($attribute->name == "src")
1015                                         $data["photo"] = trim($attribute->value);
1016
1017                 $data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
1018                 $data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
1019
1020                 return $data;
1021         }
1022
1023         /**
1024          * @brief Check for pump.io contact
1025          *
1026          * @param array $webfinger Webfinger data
1027          *
1028          * @return array pump.io data
1029          */
1030         private function pumpio($webfinger) {
1031
1032                 $data = array();
1033                 foreach ($webfinger["links"] AS $link) {
1034                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
1035                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
1036                                 $data["url"] = $link["href"];
1037                         elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != ""))
1038                                 $data["notify"] = $link["href"];
1039                         elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != ""))
1040                                 $data["poll"] = $link["href"];
1041                         elseif (($link["rel"] == "dialback") AND ($link["href"] != ""))
1042                                 $data["dialback"] = $link["href"];
1043                 }
1044                 if (isset($data["poll"]) AND isset($data["notify"]) AND
1045                         isset($data["dialback"]) AND isset($data["url"])) {
1046
1047                         // by now we use these fields only for the network type detection
1048                         // So we unset all data that isn't used at the moment
1049                         unset($data["dialback"]);
1050
1051                         $data["network"] = NETWORK_PUMPIO;
1052                 } else
1053                         return false;
1054
1055                 $profile_data = self::pumpio_profile_data($data["url"]);
1056
1057                 if (!$profile_data)
1058                         return false;
1059
1060                 $data = array_merge($data, $profile_data);
1061
1062                 return $data;
1063         }
1064
1065         /**
1066          * @brief Check page for feed link
1067          *
1068          * @param string $url Page link
1069          *
1070          * @return string feed link
1071          */
1072         private function get_feed_link($url) {
1073                 $doc = new DOMDocument();
1074
1075                 if (!@$doc->loadHTMLFile($url))
1076                         return false;
1077
1078                 $xpath = new DomXPath($doc);
1079
1080                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
1081                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
1082                 if (!is_object($feeds))
1083                         return false;
1084
1085                 if ($feeds->length == 0)
1086                         return false;
1087
1088                 $feed_url = "";
1089
1090                 foreach ($feeds AS $feed) {
1091                         $attr = array();
1092                         foreach ($feed->attributes as $attribute)
1093                         $attr[$attribute->name] = trim($attribute->value);
1094
1095                         if ($feed_url == "")
1096                                 $feed_url = $attr["href"];
1097                 }
1098
1099                 return $feed_url;
1100         }
1101
1102         /**
1103          * @brief Check for feed contact
1104          *
1105          * @param string $url Profile link
1106          * @param boolean $probe Do a probe if the page contains a feed link
1107          *
1108          * @return array feed data
1109          */
1110         private function feed($url, $probe = true) {
1111                 $ret = z_fetch_url($url);
1112                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1113                         return false;
1114                 }
1115                 $feed = $ret['body'];
1116                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1117
1118                 if (!$feed_data) {
1119                         if (!$probe)
1120                                 return false;
1121
1122                         $feed_url = self::get_feed_link($url);
1123
1124                         if (!$feed_url)
1125                                 return false;
1126
1127                         return self::feed($feed_url, false);
1128                 }
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"] = $feed_data["header"]["author-avatar"];
1138
1139                 if ($feed_data["header"]["author-id"] != "")
1140                         $data["alias"] = $feed_data["header"]["author-id"];
1141
1142                 $data["url"] = $url;
1143                 $data["poll"] = $url;
1144
1145                 if ($feed_data["header"]["author-link"] != "")
1146                         $data["baseurl"] = $feed_data["header"]["author-link"];
1147                 else
1148                         $data["baseurl"] = $data["url"];
1149
1150                 $data["network"] = NETWORK_FEED;
1151
1152                 return $data;
1153         }
1154
1155         /**
1156          * @brief Check for mail contact
1157          *
1158          * @param string $uri Profile link
1159          * @param integer $uid User ID
1160          *
1161          * @return array mail data
1162          */
1163         private function mail($uri, $uid) {
1164
1165                 if (!validate_email($uri))
1166                         return false;
1167
1168                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
1169
1170                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
1171
1172                 if (dbm::is_result($x) && dbm::is_result($r)) {
1173                         $mailbox = construct_mailbox_name($r[0]);
1174                         $password = '';
1175                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password,$x[0]['prvkey']);
1176                         $mbox = email_connect($mailbox,$r[0]['user'], $password);
1177                         if(!mbox)
1178                                 return false;
1179                 }
1180
1181                 $msgs = email_poll($mbox, $uri);
1182                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
1183
1184                 if (!count($msgs))
1185                         return false;
1186
1187                 $data = array();
1188
1189                 $data["addr"] = $uri;
1190                 $data["network"] = NETWORK_MAIL;
1191                 $data["name"] = substr($uri, 0, strpos($uri,'@'));
1192                 $data["nick"] = $data["name"];
1193                 $data["photo"] = avatar_img($uri);
1194
1195                 $phost = substr($uri, strpos($uri,'@') + 1);
1196                 $data["url"] = 'http://'.$phost."/".$data["nick"];
1197                 $data["notify"] = 'smtp '.random_string();
1198                 $data["poll"] = 'email '.random_string();
1199
1200                 $x = email_msg_meta($mbox, $msgs[0]);
1201                 if(stristr($x[0]->from, $uri))
1202                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1203                 elseif(stristr($x[0]->to, $uri))
1204                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1205                 if(isset($adr)) {
1206                         foreach($adr as $feadr) {
1207                                 if((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1208                                         &&(strcasecmp($feadr->host, $phost) == 0)
1209                                         && (strlen($feadr->personal))) {
1210
1211                                         $personal = imap_mime_header_decode($feadr->personal);
1212                                         $data["name"] = "";
1213                                         foreach($personal as $perspart)
1214                                                 if ($perspart->charset != "default")
1215                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1216                                                 else
1217                                                         $data["name"] .= $perspart->text;
1218
1219                                         $data["name"] = notags($data["name"]);
1220                                 }
1221                         }
1222                 }
1223                 imap_close($mbox);
1224
1225                 return $data;
1226         }
1227
1228         /**
1229          * @brief Mix two paths together to possibly fix missing parts
1230          *
1231          * @param string $avatar Path to the avatar
1232          * @param string $base Another path that is hopefully complete
1233          *
1234          * @return string fixed avatar path
1235          */
1236         public static function fix_avatar($avatar, $base) {
1237                 $base_parts = parse_url($base);
1238
1239                 // Remove all parts that could create a problem
1240                 unset($base_parts['path']);
1241                 unset($base_parts['query']);
1242                 unset($base_parts['fragment']);
1243
1244                 $avatar_parts = parse_url($avatar);
1245
1246                 // Now we mix them
1247                 $parts = array_merge($base_parts, $avatar_parts);
1248
1249                 // And put them together again
1250                 $scheme   = isset($parts['scheme']) ? $parts['scheme'] . '://' : '';
1251                 $host     = isset($parts['host']) ? $parts['host'] : '';
1252                 $port     = isset($parts['port']) ? ':' . $parts['port'] : '';
1253                 $path     = isset($parts['path']) ? $parts['path'] : '';
1254                 $query    = isset($parts['query']) ? '?' . $parts['query'] : '';
1255                 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
1256
1257                 $fixed = $scheme.$host.$port.$path.$query.$fragment;
1258
1259                 logger('Base: '.$base.' - Avatar: '.$avatar.' - Fixed: '.$fixed, LOGGER_DATA);
1260
1261                 return $fixed;
1262         }
1263
1264 }