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 use Friendica\Core\PConfig;
  14
  15 require_once("include/feed.php");
  16 require_once('include/email.php');
  17 require_once('include/network.php');
  18
  19 /**
  20  * @brief This class contain functions for probing URL
  21  *
  22  */
  23 class Probe {
  24
  25         private static $baseurl;
  26
  27         /**
  28          * @brief Rearrange the array so that it always has the same order
  29          *
  30          * @param array $data Unordered data
  31          *
  32          * @return array Ordered data
  33          */
  34         private function rearrangeData($data) {
  35                 $fields = array("name", "nick", "guid", "url", "addr", "alias",
  36                                 "photo", "community", "keywords", "location", "about",
  37                                 "batch", "notify", "poll", "request", "confirm", "poco",
  38                                 "priority", "network", "pubkey", "baseurl");
  39
  40                 $newdata = array();
  41                 foreach ($fields AS $field)
  42                         if (isset($data[$field]))
  43                                 $newdata[$field] = $data[$field];
  44                         else
  45                                 $newdata[$field] = "";
  46
  47                 // We don't use the "priority" field anymore and replace it with a dummy.
  48                 $newdata["priority"] = 0;
  49
  50                 return $newdata;
  51         }
  52
  53         /**
  54          * @brief Probes for XRD data
  55          *
  56          * @param string $host The host part of an url
  57          *
  58          * @return array
  59          *      'lrdd' => Link to LRDD endpoint
  60          *      'lrdd-xml' => Link to LRDD endpoint in XML format
  61          *      'lrdd-json' => Link to LRDD endpoint in JSON format
  62          */
  63         private function xrd($host) {
  64
  65                 // Reset the static variable
  66                 self::$baseurl = '';
  67
  68                 $ssl_url = "https://".$host."/.well-known/host-meta";
  69                 $url = "http://".$host."/.well-known/host-meta";
  70
  71                 $xrd_timeout = Config::get('system','xrd_timeout', 20);
  72                 $redirects = 0;
  73
  74                 $ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  75                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  76                         return false;
  77                 }
  78                 $xml = $ret['body'];
  79
  80                 $xrd = parse_xml_string($xml, false);
  81
  82                 if (!is_object($xrd)) {
  83                         $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  84                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  85                                 return false;
  86                         }
  87                         $xml = $ret['body'];
  88                         $xrd = parse_xml_string($xml, false);
  89                 }
  90                 if (!is_object($xrd))
  91                         return false;
  92
  93                 $links = \xml::element_to_array($xrd);
  94                 if (!isset($links["xrd"]["link"]))
  95                         return false;
  96
  97                 $xrd_data = array();
  98
  99                 foreach ($links["xrd"]["link"] AS $value => $link) {
 100                         if (isset($link["@attributes"]))
 101                                 $attributes = $link["@attributes"];
 102                         elseif ($value == "@attributes")
 103                                 $attributes = $link;
 104                         else
 105                                 continue;
 106
 107                         if (($attributes["rel"] == "lrdd") AND
 108                                 ($attributes["type"] == "application/xrd+xml"))
 109                                 $xrd_data["lrdd-xml"] = $attributes["template"];
 110                         elseif (($attributes["rel"] == "lrdd") AND
 111                                 ($attributes["type"] == "application/json"))
 112                                 $xrd_data["lrdd-json"] = $attributes["template"];
 113                         elseif ($attributes["rel"] == "lrdd")
 114                                 $xrd_data["lrdd"] = $attributes["template"];
 115                 }
 116
 117                 self::$baseurl = "http://".$host;
 118
 119                 return $xrd_data;
 120         }
 121
 122         /**
 123          * @brief Perform Webfinger lookup and return DFRN data
 124          *
 125          * Given an email style address, perform webfinger lookup and
 126          * return the resulting DFRN profile URL, or if no DFRN profile URL
 127          * is located, returns an OStatus subscription template (prefixed
 128          * with the string 'stat:' to identify it as on OStatus template).
 129          * If this isn't an email style address just return $webbie.
 130          * Return an empty string if email-style addresses but webfinger fails,
 131          * or if the resultant personal XRD doesn't contain a supported
 132          * subscription/friend-request attribute.
 133          *
 134          * amended 7/9/2011 to return an hcard which could save potentially loading
 135          * a lengthy content page to scrape dfrn attributes
 136          *
 137          * @param string $webbie Address that should be probed
 138          * @param string $hcard Link to the hcard - is returned by reference
 139          *
 140          * @return string profile link
 141          */
 142
 143         public static function webfingerDfrn($webbie, &$hcard) {
 144
 145                 $profile_link = '';
 146
 147                 $links = self::lrdd($webbie);
 148                 logger('webfingerDfrn: '.$webbie.':'.print_r($links,true), LOGGER_DATA);
 149                 if (count($links)) {
 150                         foreach ($links as $link) {
 151                                 if ($link['@attributes']['rel'] === NAMESPACE_DFRN)
 152                                         $profile_link = $link['@attributes']['href'];
 153                                 if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == ""))
 154                                         $profile_link = 'stat:'.$link['@attributes']['template'];
 155                                 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
 156                                         $hcard = $link['@attributes']['href'];
 157                         }
 158                 }
 159                 return $profile_link;
 160         }
 161
 162         /**
 163          * @brief Check an URI for LRDD data
 164          *
 165          * this is a replacement for the "lrdd" function in include/network.php.
 166          * It isn't used in this class and has some redundancies in the code.
 167          * When time comes we can check the existing calls for "lrdd" if we can rework them.
 168          *
 169          * @param string $uri Address that should be probed
 170          *
 171          * @return array uri data
 172          */
 173         public static function lrdd($uri) {
 174
 175                 $lrdd = self::xrd($uri);
 176
 177                 if (!$lrdd) {
 178                         $parts = @parse_url($uri);
 179                         if (!$parts)
 180                                 return array();
 181
 182                         $host = $parts["host"];
 183                         if (isset($parts["port"])) {
 184                                 $host .= ':'.$parts["port"];
 185                         }
 186
 187                         $path_parts = explode("/", trim($parts["path"], "/"));
 188
 189                         $nick = array_pop($path_parts);
 190
 191                         do {
 192                                 $lrdd = self::xrd($host);
 193                                 $host .= "/".array_shift($path_parts);
 194                         } while (!$lrdd AND (sizeof($path_parts) > 0));
 195                 }
 196
 197                 if (!$lrdd)
 198                         return array();
 199
 200                 foreach ($lrdd AS $key => $link) {
 201                         if ($webfinger)
 202                                 continue;
 203
 204                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json")))
 205                                 continue;
 206
 207                         $path = str_replace('{uri}', urlencode($uri), $link);
 208                         $webfinger = self::webfinger($path);
 209
 210                         if (!$webfinger AND (strstr($uri, "@"))) {
 211                                 $path = str_replace('{uri}', urlencode("acct:".$uri), $link);
 212                                 $webfinger = self::webfinger($path);
 213                         }
 214
 215                         // Special treatment for Mastodon
 216                         // Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 217                         // But the webfinger for this format fails.
 218                         if (!$webfinger AND isset($nick)) {
 219                                 // Mastodon uses a "@" as prefix for usernames in their url format
 220                                 $nick = ltrim($nick, '@');
 221
 222                                 $addr = $nick."@".$host;
 223
 224                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 225                                 $webfinger = self::webfinger($path);
 226                         }
 227                 }
 228
 229                 if (!is_array($webfinger["links"]))
 230                         return false;
 231
 232                 $data = array();
 233
 234                 foreach ($webfinger["links"] AS $link)
 235                         $data[] = array("@attributes" => $link);
 236
 237                 if (is_array($webfinger["aliases"]))
 238                         foreach ($webfinger["aliases"] AS $alias)
 239                                 $data[] = array("@attributes" =>
 240                                                         array("rel" => "alias",
 241                                                                 "href" => $alias));
 242
 243                 return $data;
 244         }
 245
 246         /**
 247          * @brief Fetch information (protocol endpoints and user information) about a given uri
 248          *
 249          * @param string $uri Address that should be probed
 250          * @param string $network Test for this specific network
 251          * @param integer $uid User ID for the probe (only used for mails)
 252          * @param boolean $cache Use cached values?
 253          *
 254          * @return array uri data
 255          */
 256         public static function uri($uri, $network = "", $uid = 0, $cache = true) {
 257
 258                 if ($cache) {
 259                         $result = \Cache::get("probe_url:".$network.":".$uri);
 260                         if (!is_null($result)) {
 261                                 return $result;
 262                         }
 263                 }
 264
 265                 if ($uid == 0)
 266                         $uid = local_user();
 267
 268                 $data = self::detect($uri, $network, $uid);
 269
 270                 if (!isset($data["url"]))
 271                         $data["url"] = $uri;
 272
 273                 if ($data["photo"] != "")
 274                         $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 275                 else
 276                         $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 277
 278                 if (!isset($data["name"]) OR ($data["name"] == "")) {
 279                         if (isset($data["nick"]))
 280                                 $data["name"] = $data["nick"];
 281
 282                         if ($data["name"] == "")
 283                                 $data["name"] = $data["url"];
 284                 }
 285
 286                 if (!isset($data["nick"]) OR ($data["nick"] == "")) {
 287                         $data["nick"] = strtolower($data["name"]);
 288
 289                         if (strpos($data['nick'], ' '))
 290                                 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
 291                 }
 292
 293                 if (self::$baseurl != "") {
 294                         $data["baseurl"] = self::$baseurl;
 295                 }
 296
 297                 if (!isset($data["network"])) {
 298                         $data["network"] = NETWORK_PHANTOM;
 299                 }
 300
 301                 $data = self::rearrangeData($data);
 302
 303                 // Only store into the cache if the value seems to be valid
 304                 if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
 305                         \Cache::set("probe_url:".$network.":".$uri, $data, CACHE_DAY);
 306
 307                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 308                         /// The biggest problem is the avatar picture that could have a reduced image size.
 309                         /// It should only be updated if the existing picture isn't existing anymore.
 310                         if (($data['network'] != NETWORK_FEED) AND ($mode == PROBE_NORMAL) AND
 311                                 $data["name"] AND $data["nick"] AND $data["url"] AND $data["addr"] AND $data["poll"])
 312                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 313                                                 `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
 314                                         WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
 315                                         dbesc($data["name"]),
 316                                         dbesc($data["nick"]),
 317                                         dbesc($data["url"]),
 318                                         dbesc($data["addr"]),
 319                                         dbesc($data["notify"]),
 320                                         dbesc($data["poll"]),
 321                                         dbesc($data["alias"]),
 322                                         dbesc(datetime_convert()),
 323                                         dbesc(normalise_link($data['url']))
 324                         );
 325                 }
 326
 327                 return $data;
 328         }
 329
 330         /**
 331          * @brief Fetch information (protocol endpoints and user information) about a given uri
 332          *
 333          * This function is only called by the "uri" function that adds caching and rearranging of data.
 334          *
 335          * @param string $uri Address that should be probed
 336          * @param string $network Test for this specific network
 337          * @param integer $uid User ID for the probe (only used for mails)
 338          *
 339          * @return array uri data
 340          */
 341         private function detect($uri, $network, $uid) {
 342                 $parts = parse_url($uri);
 343
 344                 if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
 345
 346                         $host = $parts["host"];
 347                         if (isset($parts["port"])) {
 348                                 $host .= ':'.$parts["port"];
 349                         }
 350
 351                         if ($host == 'twitter.com') {
 352                                 return array("network" => NETWORK_TWITTER);
 353                         }
 354                         $lrdd = self::xrd($host);
 355
 356                         $path_parts = explode("/", trim($parts["path"], "/"));
 357
 358                         while (!$lrdd AND (sizeof($path_parts) > 1)) {
 359                                 $host .= "/".array_shift($path_parts);
 360                                 $lrdd = self::xrd($host);
 361                         }
 362                         if (!$lrdd) {
 363                                 return self::feed($uri);
 364                         }
 365                         $nick = array_pop($path_parts);
 366
 367                         // Mastodon uses a "@" as prefix for usernames in their url format
 368                         $nick = ltrim($nick, '@');
 369
 370                         $addr = $nick."@".$host;
 371                 } elseif (strstr($uri, '@')) {
 372                         // If the URI starts with "mailto:" then jump directly to the mail detection
 373                         if (strpos($url,'mailto:') !== false) {
 374                                 $uri = str_replace('mailto:', '', $url);
 375                                 return self::mail($uri, $uid);
 376                         }
 377
 378                         if ($network == NETWORK_MAIL) {
 379                                 return self::mail($uri, $uid);
 380                         }
 381                         // Remove "acct:" from the URI
 382                         $uri = str_replace('acct:', '', $uri);
 383
 384                         $host = substr($uri,strpos($uri, '@') + 1);
 385                         $nick = substr($uri,0, strpos($uri, '@'));
 386
 387                         if (strpos($uri, '@twitter.com')) {
 388                                 return array("network" => NETWORK_TWITTER);
 389                         }
 390                         $lrdd = self::xrd($host);
 391
 392                         if (!$lrdd) {
 393                                 return self::mail($uri, $uid);
 394                         }
 395                         $addr = $uri;
 396                 } else {
 397                         return false;
 398                 }
 399
 400                 $webfinger = false;
 401
 402                 /// @todo Do we need the prefix "acct:" or "acct://"?
 403
 404                 foreach ($lrdd AS $key => $link) {
 405                         if ($webfinger) {
 406                                 continue;
 407                         }
 408                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 409                                 continue;
 410                         }
 411                         // At first try it with the given uri
 412                         $path = str_replace('{uri}', urlencode($uri), $link);
 413                         $webfinger = self::webfinger($path);
 414
 415                         // We cannot be sure that the detected address was correct, so we don't use the values
 416                         if ($webfinger AND ($uri != $addr)) {
 417                                 $nick = "";
 418                                 $addr = "";
 419                         }
 420
 421                         // Try webfinger with the address (user@domain.tld)
 422                         if (!$webfinger) {
 423                                 $path = str_replace('{uri}', urlencode($addr), $link);
 424                                 $webfinger = self::webfinger($path);
 425                         }
 426
 427                         // Mastodon needs to have it with "acct:"
 428                         if (!$webfinger) {
 429                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 430                                 $webfinger = self::webfinger($path);
 431                         }
 432                 }
 433                 if (!$webfinger) {
 434                         return self::feed($uri);
 435                 }
 436
 437                 $result = false;
 438
 439                 logger("Probing ".$uri, LOGGER_DEBUG);
 440
 441                 if (in_array($network, array("", NETWORK_DFRN)))
 442                         $result = self::dfrn($webfinger);
 443                 if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA))
 444                         $result = self::diaspora($webfinger);
 445                 if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS))
 446                         $result = self::ostatus($webfinger);
 447                 if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO))
 448                         $result = self::pumpio($webfinger);
 449                 if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED))
 450                         $result = self::feed($uri);
 451                 else {
 452                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 453                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 454                         if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != ""))
 455                                 $result["nick"] = $nick;
 456
 457                         if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != ""))
 458                                 $result["addr"] = $addr;
 459                 }
 460
 461                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 462
 463                 if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
 464                         $pos = strpos($result["url"], $host);
 465                         if ($pos)
 466                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 467                 }
 468
 469                 return $result;
 470         }
 471
 472         /**
 473          * @brief Perform a webfinger request.
 474          *
 475          * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
 476          *
 477          * @param string $url Address that should be probed
 478          *
 479          * @return array webfinger data
 480          */
 481         private function webfinger($url) {
 482
 483                 $xrd_timeout = Config::get('system','xrd_timeout', 20);
 484                 $redirects = 0;
 485
 486                 $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
 487                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 488                         return false;
 489                 }
 490                 $data = $ret['body'];
 491
 492                 $xrd = parse_xml_string($data, false);
 493
 494                 if (!is_object($xrd)) {
 495                         // If it is not XML, maybe it is JSON
 496                         $webfinger = json_decode($data, true);
 497
 498                         if (!isset($webfinger["links"]))
 499                                 return false;
 500
 501                         return $webfinger;
 502                 }
 503
 504                 $xrd_arr = \xml::element_to_array($xrd);
 505                 if (!isset($xrd_arr["xrd"]["link"]))
 506                         return false;
 507
 508                 $webfinger = array();
 509
 510                 if (isset($xrd_arr["xrd"]["subject"]))
 511                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 512
 513                 if (isset($xrd_arr["xrd"]["alias"]))
 514                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 515
 516                 $webfinger["links"] = array();
 517
 518                 foreach ($xrd_arr["xrd"]["link"] AS $value => $data) {
 519                         if (isset($data["@attributes"]))
 520                                 $attributes = $data["@attributes"];
 521                         elseif ($value == "@attributes")
 522                                 $attributes = $data;
 523                         else
 524                                 continue;
 525
 526                         $webfinger["links"][] = $attributes;
 527                 }
 528                 return $webfinger;
 529         }
 530
 531         /**
 532          * @brief Poll the Friendica specific noscrape page.
 533          *
 534          * "noscrape" is a faster alternative to fetch the data from the hcard.
 535          * This functionality was originally created for the directory.
 536          *
 537          * @param string $noscrape Link to the noscrape page
 538          * @param array $data The already fetched data
 539          *
 540          * @return array noscrape data
 541          */
 542         private function pollNoscrape($noscrape, $data) {
 543                 $ret = z_fetch_url($noscrape);
 544                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 545                         return false;
 546                 }
 547                 $content = $ret['body'];
 548                 if (!$content) {
 549                         return false;
 550                 }
 551
 552                 $json = json_decode($content, true);
 553                 if (!is_array($json))
 554                         return false;
 555
 556                 if (isset($json["fn"]))
 557                         $data["name"] = $json["fn"];
 558
 559                 if (isset($json["addr"]))
 560                         $data["addr"] = $json["addr"];
 561
 562                 if (isset($json["nick"]))
 563                         $data["nick"] = $json["nick"];
 564
 565                 if (isset($json["comm"]))
 566                         $data["community"] = $json["comm"];
 567
 568                 if (isset($json["tags"])) {
 569                         $keywords = implode(" ", $json["tags"]);
 570                         if ($keywords != "")
 571                                 $data["keywords"] = $keywords;
 572                 }
 573
 574                 $location = formatted_location($json);
 575                 if ($location)
 576                         $data["location"] = $location;
 577
 578                 if (isset($json["about"]))
 579                         $data["about"] = $json["about"];
 580
 581                 if (isset($json["key"]))
 582                         $data["pubkey"] = $json["key"];
 583
 584                 if (isset($json["photo"]))
 585                         $data["photo"] = $json["photo"];
 586
 587                 if (isset($json["dfrn-request"]))
 588                         $data["request"] = $json["dfrn-request"];
 589
 590                 if (isset($json["dfrn-confirm"]))
 591                         $data["confirm"] = $json["dfrn-confirm"];
 592
 593                 if (isset($json["dfrn-notify"]))
 594                         $data["notify"] = $json["dfrn-notify"];
 595
 596                 if (isset($json["dfrn-poll"]))
 597                         $data["poll"] = $json["dfrn-poll"];
 598
 599                 return $data;
 600         }
 601
 602         /**
 603          * @brief Check for valid DFRN data
 604          *
 605          * @param array $data DFRN data
 606          *
 607          * @return int Number of errors
 608          */
 609         public static function validDfrn($data) {
 610                 $errors = 0;
 611                 if(!isset($data['key']))
 612                         $errors ++;
 613                 if(!isset($data['dfrn-request']))
 614                         $errors ++;
 615                 if(!isset($data['dfrn-confirm']))
 616                         $errors ++;
 617                 if(!isset($data['dfrn-notify']))
 618                         $errors ++;
 619                 if(!isset($data['dfrn-poll']))
 620                         $errors ++;
 621                 return $errors;
 622         }
 623
 624         /**
 625          * @brief Fetch data from a DFRN profile page and via "noscrape"
 626          *
 627          * @param string $profile Link to the profile page
 628          *
 629          * @return array profile data
 630          */
 631         public static function profile($profile) {
 632
 633                 $data = array();
 634
 635                 logger("Check profile ".$profile, LOGGER_DEBUG);
 636
 637                 // Fetch data via noscrape - this is faster
 638                 $noscrape = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile);
 639                 $data = self::pollNoscrape($noscrape, $data);
 640
 641                 if (!isset($data["notify"]) OR !isset($data["confirm"]) OR
 642                         !isset($data["request"]) OR !isset($data["poll"]) OR
 643                         !isset($data["poco"]) OR !isset($data["name"]) OR
 644                         !isset($data["photo"]))
 645                         $data = self::pollHcard($profile, $data, true);
 646
 647                 $prof_data = array();
 648                 $prof_data["addr"] = $data["addr"];
 649                 $prof_data["nick"] = $data["nick"];
 650                 $prof_data["dfrn-request"] = $data["request"];
 651                 $prof_data["dfrn-confirm"] = $data["confirm"];
 652                 $prof_data["dfrn-notify"] = $data["notify"];
 653                 $prof_data["dfrn-poll"] = $data["poll"];
 654                 $prof_data["dfrn-poco"] = $data["poco"];
 655                 $prof_data["photo"] = $data["photo"];
 656                 $prof_data["fn"] = $data["name"];
 657                 $prof_data["key"] = $data["pubkey"];
 658
 659                 logger("Result for profile ".$profile.": ".print_r($prof_data, true), LOGGER_DEBUG);
 660
 661                 return $prof_data;
 662         }
 663
 664         /**
 665          * @brief Check for DFRN contact
 666          *
 667          * @param array $webfinger Webfinger data
 668          *
 669          * @return array DFRN data
 670          */
 671         private function dfrn($webfinger) {
 672
 673                 $hcard = "";
 674                 $data = array();
 675                 foreach ($webfinger["links"] AS $link) {
 676                         if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != ""))
 677                                 $data["network"] = NETWORK_DFRN;
 678                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 679                                 $data["poll"] = $link["href"];
 680                         elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 681                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 682                                 $data["url"] = $link["href"];
 683                         elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
 684                                 $hcard = $link["href"];
 685                         elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
 686                                 $data["poco"] = $link["href"];
 687                         elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != ""))
 688                                 $data["photo"] = $link["href"];
 689
 690                         elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
 691                                 $data["baseurl"] = trim($link["href"], '/');
 692                         elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
 693                                 $data["guid"] = $link["href"];
 694                         elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 695                                 $data["pubkey"] = base64_decode($link["href"]);
 696
 697                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 698                                 if (strstr($data["pubkey"], 'RSA '))
 699                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 700                         }
 701                 }
 702
 703                 if (!isset($data["network"]) OR ($hcard == ""))
 704                         return false;
 705
 706                 // Fetch data via noscrape - this is faster
 707                 $noscrape = str_replace("/hcard/", "/noscrape/", $hcard);
 708                 $data = self::pollNoscrape($noscrape, $data);
 709
 710                 if (isset($data["notify"]) AND isset($data["confirm"]) AND isset($data["request"]) AND
 711                         isset($data["poll"]) AND isset($data["name"]) AND isset($data["photo"]))
 712                         return $data;
 713
 714                 $data = self::pollHcard($hcard, $data, true);
 715
 716                 return $data;
 717         }
 718
 719         /**
 720          * @brief Poll the hcard page (Diaspora and Friendica specific)
 721          *
 722          * @param string $hcard Link to the hcard page
 723          * @param array $data The already fetched data
 724          * @param boolean $dfrn Poll DFRN specific data
 725          *
 726          * @return array hcard data
 727          */
 728         private function pollHcard($hcard, $data, $dfrn = false) {
 729                 $ret = z_fetch_url($hcard);
 730                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 731                         return false;
 732                 }
 733                 $content = $ret['body'];
 734                 if (!$content) {
 735                         return false;
 736                 }
 737
 738                 $doc = new \DOMDocument();
 739                 if (!@$doc->loadHTML($content))
 740                         return false;
 741
 742                 $xpath = new \DomXPath($doc);
 743
 744                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
 745                 if (!is_object($vcards))
 746                         return false;
 747
 748                 if ($vcards->length > 0) {
 749                         $vcard = $vcards->item(0);
 750
 751                         // We have to discard the guid from the hcard in favour of the guid from lrdd
 752                         // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 753                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
 754                         if (($search->length > 0) AND ($data["guid"] == ""))
 755                                 $data["guid"] = $search->item(0)->nodeValue;
 756
 757                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
 758                         if ($search->length > 0)
 759                                 $data["nick"] = $search->item(0)->nodeValue;
 760
 761                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
 762                         if ($search->length > 0)
 763                                 $data["name"] = $search->item(0)->nodeValue;
 764
 765                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 766                         if ($search->length > 0)
 767                                 $data["searchable"] = $search->item(0)->nodeValue;
 768
 769                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
 770                         if ($search->length > 0) {
 771                                 $data["pubkey"] = $search->item(0)->nodeValue;
 772                                 if (strstr($data["pubkey"], 'RSA '))
 773                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 774                         }
 775
 776                         $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
 777                         if ($search->length > 0)
 778                                 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
 779                 }
 780
 781                 $avatar = array();
 782                 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 783                 foreach ($photos AS $photo) {
 784                         $attr = array();
 785                         foreach ($photo->attributes as $attribute) {
 786                                 $attr[$attribute->name] = trim($attribute->value);
 787                         }
 788
 789                         if (isset($attr["src"]) AND isset($attr["width"])) {
 790                                 $avatar[$attr["width"]] = $attr["src"];
 791                         }
 792
 793                         // We don't have a width. So we just take everything that we got.
 794                         // This is a Hubzilla workaround which doesn't send a width.
 795                         if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
 796                                 $avatar[] = $attr["src"];
 797                         }
 798                 }
 799
 800                 if (sizeof($avatar)) {
 801                         ksort($avatar);
 802                         $data["photo"] = self::fixAvatar(array_pop($avatar), $data["baseurl"]);
 803                 }
 804
 805                 if ($dfrn) {
 806                         // Poll DFRN specific data
 807                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
 808                         if ($search->length > 0) {
 809                                 foreach ($search AS $link) {
 810                                         //$data["request"] = $search->item(0)->nodeValue;
 811                                         $attr = array();
 812                                         foreach ($link->attributes as $attribute)
 813                                                 $attr[$attribute->name] = trim($attribute->value);
 814
 815                                         $data[substr($attr["rel"], 5)] = $attr["href"];
 816                                 }
 817                         }
 818
 819                         // Older Friendica versions had used the "uid" field differently than newer versions
 820                         if ($data["nick"] == $data["guid"])
 821                                 unset($data["guid"]);
 822                 }
 823
 824
 825                 return $data;
 826         }
 827
 828         /**
 829          * @brief Check for Diaspora contact
 830          *
 831          * @param array $webfinger Webfinger data
 832          *
 833          * @return array Diaspora data
 834          */
 835         private function diaspora($webfinger) {
 836
 837                 $hcard = "";
 838                 $data = array();
 839                 foreach ($webfinger["links"] AS $link) {
 840                         if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
 841                                 $hcard = $link["href"];
 842                         elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
 843                                 $data["baseurl"] = trim($link["href"], '/');
 844                         elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
 845                                 $data["guid"] = $link["href"];
 846                         elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 847                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 848                                 $data["url"] = $link["href"];
 849                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 850                                 $data["poll"] = $link["href"];
 851                         elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
 852                                 $data["poco"] = $link["href"];
 853                         elseif (($link["rel"] == "salmon") AND ($link["href"] != ""))
 854                                 $data["notify"] = $link["href"];
 855                         elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 856                                 $data["pubkey"] = base64_decode($link["href"]);
 857
 858                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 859                                 if (strstr($data["pubkey"], 'RSA '))
 860                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 861                         }
 862                 }
 863
 864                 if (!isset($data["url"]) OR ($hcard == ""))
 865                         return false;
 866
 867                 if (is_array($webfinger["aliases"]))
 868                         foreach ($webfinger["aliases"] AS $alias)
 869                                 if (normalise_link($alias) != normalise_link($data["url"]) AND !strstr($alias, "@"))
 870                                         $data["alias"] = $alias;
 871
 872                 // Fetch further information from the hcard
 873                 $data = self::pollHcard($hcard, $data);
 874
 875                 if (!$data)
 876                         return false;
 877
 878                 if (isset($data["url"]) AND isset($data["guid"]) AND isset($data["baseurl"]) AND
 879                         isset($data["pubkey"]) AND ($hcard != "")) {
 880                         $data["network"] = NETWORK_DIASPORA;
 881
 882                         // The Diaspora handle must always be lowercase
 883                         $data["addr"] = strtolower($data["addr"]);
 884
 885                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
 886                         $data["notify"] = $data["baseurl"]."/receive/users/".$data["guid"];
 887                         $data["batch"] = $data["baseurl"]."/receive/public";
 888                 } else
 889                         return false;
 890
 891                 return $data;
 892         }
 893
 894         /**
 895          * @brief Check for OStatus contact
 896          *
 897          * @param array $webfinger Webfinger data
 898          *
 899          * @return array OStatus data
 900          */
 901         private function ostatus($webfinger) {
 902                 $data = array();
 903                 if (is_array($webfinger["aliases"])) {
 904                         foreach ($webfinger["aliases"] AS $alias) {
 905                                 if (strstr($alias, "@")) {
 906                                         $data["addr"] = str_replace('acct:', '', $alias);
 907                                 }
 908                         }
 909                 }
 910
 911                 if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
 912                         $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
 913                 }
 914                 $pubkey = "";
 915                 foreach ($webfinger["links"] AS $link) {
 916                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 917                                 ($link["type"] == "text/html") AND ($link["href"] != "")) {
 918                                 $data["url"] = $link["href"];
 919                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
 920                                 $data["notify"] = $link["href"];
 921                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 922                                 $data["poll"] = $link["href"];
 923                         } elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
 924                                 $pubkey = $link["href"];
 925
 926                                 if (substr($pubkey, 0, 5) === 'data:') {
 927                                         if (strstr($pubkey, ',')) {
 928                                                 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
 929                                         } else {
 930                                                 $pubkey = substr($pubkey, 5);
 931                                         }
 932                                 } elseif (normalise_link($pubkey) == 'http://') {
 933                                         $ret = z_fetch_url($pubkey);
 934                                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 935                                                 return false;
 936                                         }
 937                                         $pubkey = $ret['body'];
 938                                 }
 939
 940                                 $key = explode(".", $pubkey);
 941
 942                                 if (sizeof($key) >= 3) {
 943                                         $m = base64url_decode($key[1]);
 944                                         $e = base64url_decode($key[2]);
 945                                         $data["pubkey"] = metopem($m,$e);
 946                                 }
 947                         }
 948                 }
 949
 950                 if (isset($data["notify"]) AND isset($data["pubkey"]) AND
 951                         isset($data["poll"]) AND isset($data["url"])) {
 952                         $data["network"] = NETWORK_OSTATUS;
 953                 } else {
 954                         return false;
 955                 }
 956                 // Fetch all additional data from the feed
 957                 $ret = z_fetch_url($data["poll"]);
 958                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 959                         return false;
 960                 }
 961                 $feed = $ret['body'];
 962                 $feed_data = feed_import($feed,$dummy1,$dummy2, $dummy3, true);
 963                 if (!$feed_data) {
 964                         return false;
 965                 }
 966                 if ($feed_data["header"]["author-name"] != "") {
 967                         $data["name"] = $feed_data["header"]["author-name"];
 968                 }
 969                 if ($feed_data["header"]["author-nick"] != "") {
 970                         $data["nick"] = $feed_data["header"]["author-nick"];
 971                 }
 972                 if ($feed_data["header"]["author-avatar"] != "") {
 973                         $data["photo"] = self::fixAvatar($feed_data["header"]["author-avatar"], $data["url"]);
 974                 }
 975                 if ($feed_data["header"]["author-id"] != "") {
 976                         $data["alias"] = $feed_data["header"]["author-id"];
 977                 }
 978                 if ($feed_data["header"]["author-location"] != "") {
 979                         $data["location"] = $feed_data["header"]["author-location"];
 980                 }
 981                 if ($feed_data["header"]["author-about"] != "") {
 982                         $data["about"] = $feed_data["header"]["author-about"];
 983                 }
 984                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
 985                 // So we take the value that we just fetched, although the other one worked as well
 986                 if ($feed_data["header"]["author-link"] != "") {
 987                         $data["url"] = $feed_data["header"]["author-link"];
 988                 }
 989                 /// @todo Fetch location and "about" from the feed as well
 990                 return $data;
 991         }
 992
 993         /**
 994          * @brief Fetch data from a pump.io profile page
 995          *
 996          * @param string $profile Link to the profile page
 997          *
 998          * @return array profile data
 999          */
1000         private function pumpioProfileData($profile) {
1001
1002                 $doc = new \DOMDocument();
1003                 if (!@$doc->loadHTMLFile($profile))
1004                         return false;
1005
1006                 $xpath = new \DomXPath($doc);
1007
1008                 $data = array();
1009
1010                 // This is ugly - but pump.io doesn't seem to know a better way for it
1011                 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1012                 $pos = strpos($data["name"], chr(10));
1013                 if ($pos)
1014                         $data["name"] = trim(substr($data["name"], 0, $pos));
1015
1016                 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1017                 if ($avatar)
1018                         foreach ($avatar->attributes as $attribute)
1019                                 if ($attribute->name == "src")
1020                                         $data["photo"] = trim($attribute->value);
1021
1022                 $data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
1023                 $data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
1024
1025                 return $data;
1026         }
1027
1028         /**
1029          * @brief Check for pump.io contact
1030          *
1031          * @param array $webfinger Webfinger data
1032          *
1033          * @return array pump.io data
1034          */
1035         private function pumpio($webfinger) {
1036
1037                 $data = array();
1038                 foreach ($webfinger["links"] AS $link) {
1039                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
1040                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
1041                                 $data["url"] = $link["href"];
1042                         elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != ""))
1043                                 $data["notify"] = $link["href"];
1044                         elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != ""))
1045                                 $data["poll"] = $link["href"];
1046                         elseif (($link["rel"] == "dialback") AND ($link["href"] != ""))
1047                                 $data["dialback"] = $link["href"];
1048                 }
1049                 if (isset($data["poll"]) AND isset($data["notify"]) AND
1050                         isset($data["dialback"]) AND isset($data["url"])) {
1051
1052                         // by now we use these fields only for the network type detection
1053                         // So we unset all data that isn't used at the moment
1054                         unset($data["dialback"]);
1055
1056                         $data["network"] = NETWORK_PUMPIO;
1057                 } else
1058                         return false;
1059
1060                 $profile_data = self::pumpioProfileData($data["url"]);
1061
1062                 if (!$profile_data)
1063                         return false;
1064
1065                 $data = array_merge($data, $profile_data);
1066
1067                 return $data;
1068         }
1069
1070         /**
1071          * @brief Check page for feed link
1072          *
1073          * @param string $url Page link
1074          *
1075          * @return string feed link
1076          */
1077         private function getFeedLink($url) {
1078                 $doc = new \DOMDocument();
1079
1080                 if (!@$doc->loadHTMLFile($url))
1081                         return false;
1082
1083                 $xpath = new \DomXPath($doc);
1084
1085                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
1086                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
1087                 if (!is_object($feeds))
1088                         return false;
1089
1090                 if ($feeds->length == 0)
1091                         return false;
1092
1093                 $feed_url = "";
1094
1095                 foreach ($feeds AS $feed) {
1096                         $attr = array();
1097                         foreach ($feed->attributes as $attribute)
1098                         $attr[$attribute->name] = trim($attribute->value);
1099
1100                         if ($feed_url == "")
1101                                 $feed_url = $attr["href"];
1102                 }
1103
1104                 return $feed_url;
1105         }
1106
1107         /**
1108          * @brief Check for feed contact
1109          *
1110          * @param string $url Profile link
1111          * @param boolean $probe Do a probe if the page contains a feed link
1112          *
1113          * @return array feed data
1114          */
1115         private function feed($url, $probe = true) {
1116                 $ret = z_fetch_url($url);
1117                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1118                         return false;
1119                 }
1120                 $feed = $ret['body'];
1121                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1122
1123                 if (!$feed_data) {
1124                         if (!$probe)
1125                                 return false;
1126
1127                         $feed_url = self::getFeedLink($url);
1128
1129                         if (!$feed_url)
1130                                 return false;
1131
1132                         return self::feed($feed_url, false);
1133                 }
1134
1135                 if ($feed_data["header"]["author-name"] != "")
1136                         $data["name"] = $feed_data["header"]["author-name"];
1137
1138                 if ($feed_data["header"]["author-nick"] != "")
1139                         $data["nick"] = $feed_data["header"]["author-nick"];
1140
1141                 if ($feed_data["header"]["author-avatar"] != "")
1142                         $data["photo"] = $feed_data["header"]["author-avatar"];
1143
1144                 if ($feed_data["header"]["author-id"] != "")
1145                         $data["alias"] = $feed_data["header"]["author-id"];
1146
1147                 $data["url"] = $url;
1148                 $data["poll"] = $url;
1149
1150                 if ($feed_data["header"]["author-link"] != "")
1151                         $data["baseurl"] = $feed_data["header"]["author-link"];
1152                 else
1153                         $data["baseurl"] = $data["url"];
1154
1155                 $data["network"] = NETWORK_FEED;
1156
1157                 return $data;
1158         }
1159
1160         /**
1161          * @brief Check for mail contact
1162          *
1163          * @param string $uri Profile link
1164          * @param integer $uid User ID
1165          *
1166          * @return array mail data
1167          */
1168         private function mail($uri, $uid) {
1169
1170                 if (!validate_email($uri))
1171                         return false;
1172
1173                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
1174
1175                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
1176
1177                 if (\dbm::is_result($x) && \dbm::is_result($r)) {
1178                         $mailbox = construct_mailbox_name($r[0]);
1179                         $password = '';
1180                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password,$x[0]['prvkey']);
1181                         $mbox = email_connect($mailbox,$r[0]['user'], $password);
1182                         if(!mbox)
1183                                 return false;
1184                 }
1185
1186                 $msgs = email_poll($mbox, $uri);
1187                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
1188
1189                 if (!count($msgs))
1190                         return false;
1191
1192                 $data = array();
1193
1194                 $data["addr"] = $uri;
1195                 $data["network"] = NETWORK_MAIL;
1196                 $data["name"] = substr($uri, 0, strpos($uri,'@'));
1197                 $data["nick"] = $data["name"];
1198                 $data["photo"] = avatar_img($uri);
1199
1200                 $phost = substr($uri, strpos($uri,'@') + 1);
1201                 $data["url"] = 'http://'.$phost."/".$data["nick"];
1202                 $data["notify"] = 'smtp '.random_string();
1203                 $data["poll"] = 'email '.random_string();
1204
1205                 $x = email_msg_meta($mbox, $msgs[0]);
1206                 if(stristr($x[0]->from, $uri))
1207                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1208                 elseif(stristr($x[0]->to, $uri))
1209                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1210                 if(isset($adr)) {
1211                         foreach($adr as $feadr) {
1212                                 if((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1213                                         &&(strcasecmp($feadr->host, $phost) == 0)
1214                                         && (strlen($feadr->personal))) {
1215
1216                                         $personal = imap_mime_header_decode($feadr->personal);
1217                                         $data["name"] = "";
1218                                         foreach($personal as $perspart)
1219                                                 if ($perspart->charset != "default")
1220                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1221                                                 else
1222                                                         $data["name"] .= $perspart->text;
1223
1224                                         $data["name"] = notags($data["name"]);
1225                                 }
1226                         }
1227                 }
1228                 imap_close($mbox);
1229
1230                 return $data;
1231         }
1232
1233         /**
1234          * @brief Mix two paths together to possibly fix missing parts
1235          *
1236          * @param string $avatar Path to the avatar
1237          * @param string $base Another path that is hopefully complete
1238          *
1239          * @return string fixed avatar path
1240          */
1241         public static function fixAvatar($avatar, $base) {
1242                 $base_parts = parse_url($base);
1243
1244                 // Remove all parts that could create a problem
1245                 unset($base_parts['path']);
1246                 unset($base_parts['query']);
1247                 unset($base_parts['fragment']);
1248
1249                 $avatar_parts = parse_url($avatar);
1250
1251                 // Now we mix them
1252                 $parts = array_merge($base_parts, $avatar_parts);
1253
1254                 // And put them together again
1255                 $scheme   = isset($parts['scheme']) ? $parts['scheme'] . '://' : '';
1256                 $host     = isset($parts['host']) ? $parts['host'] : '';
1257                 $port     = isset($parts['port']) ? ':' . $parts['port'] : '';
1258                 $path     = isset($parts['path']) ? $parts['path'] : '';
1259                 $query    = isset($parts['query']) ? '?' . $parts['query'] : '';
1260                 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
1261
1262                 $fixed = $scheme.$host.$port.$path.$query.$fragment;
1263
1264                 logger('Base: '.$base.' - Avatar: '.$avatar.' - Fixed: '.$fixed, LOGGER_DATA);
1265
1266                 return $fixed;
1267         }
1268
1269 }