include/Probe.php

   1 <?php
   2 /**
   3  * @brief This class contain functions for probing URL
   4  *
   5  */
   6
   7 use \Friendica\Core\Config;
   8 use \Friendica\Core\PConfig;
   9
  10 require_once("include/feed.php");
  11 require_once('include/email.php');
  12 require_once('include/network.php');
  13
  14 class Probe {
  15
  16         /**
  17          * @brief Rearrange the array so that it always has the same order
  18          *
  19          * @param array $data Unordered data
  20          *
  21          * @return array Ordered data
  22          */
  23         private function rearrange_data($data) {
  24                 $fields = array("name", "nick", "guid", "url", "addr", "alias",
  25                                 "photo", "community", "keywords", "location", "about",
  26                                 "batch", "notify", "poll", "request", "confirm", "poco",
  27                                 "priority", "network", "pubkey", "baseurl");
  28
  29                 $newdata = array();
  30                 foreach ($fields AS $field)
  31                         if (isset($data[$field]))
  32                                 $newdata[$field] = $data[$field];
  33                         else
  34                                 $newdata[$field] = "";
  35
  36                 // We don't use the "priority" field anymore and replace it with a dummy.
  37                 $newdata["priority"] = 0;
  38
  39                 return $newdata;
  40         }
  41
  42         /**
  43          * @brief Probes for XRD data
  44          *
  45          * @return array
  46          *      'lrdd' => Link to LRDD endpoint
  47          *      'lrdd-xml' => Link to LRDD endpoint in XML format
  48          *      'lrdd-json' => Link to LRDD endpoint in JSON format
  49          */
  50         private function xrd($host) {
  51
  52                 $ssl_url = "https://".$host."/.well-known/host-meta";
  53                 $url = "http://".$host."/.well-known/host-meta";
  54
  55                 $xrd_timeout = Config::get('system','xrd_timeout', 20);
  56                 $redirects = 0;
  57
  58                 $xml = fetch_url($ssl_url, false, $redirects, $xrd_timeout, "application/xrd+xml");
  59                 $xrd = parse_xml_string($xml, false);
  60
  61                 if (!is_object($xrd)) {
  62                         $xml = fetch_url($url, false, $redirects, $xrd_timeout, "application/xrd+xml");
  63                         $xrd = parse_xml_string($xml, false);
  64                 }
  65                 if (!is_object($xrd))
  66                         return false;
  67
  68                 $links = xml::element_to_array($xrd);
  69                 if (!isset($links["xrd"]["link"]))
  70                         return false;
  71
  72                 $xrd_data = array();
  73                 foreach ($links["xrd"]["link"] AS $value => $link) {
  74                         if (isset($link["@attributes"]))
  75                                 $attributes = $link["@attributes"];
  76                         elseif ($value == "@attributes")
  77                                 $attributes = $link;
  78                         else
  79                                 continue;
  80
  81                         if (($attributes["rel"] == "lrdd") AND
  82                                 ($attributes["type"] == "application/xrd+xml"))
  83                                 $xrd_data["lrdd-xml"] = $attributes["template"];
  84                         elseif (($attributes["rel"] == "lrdd") AND
  85                                 ($attributes["type"] == "application/json"))
  86                                 $xrd_data["lrdd-json"] = $attributes["template"];
  87                         elseif ($attributes["rel"] == "lrdd")
  88                                 $xrd_data["lrdd"] = $attributes["template"];
  89                 }
  90                 return $xrd_data;
  91         }
  92
  93         /**
  94          * @brief Fetch information about a given uri
  95          *
  96          * @param string $uri Address that should be probed
  97          * @param string $network Test for this specific network
  98          * @param integer $uid User ID for the probe (only used for mails)
  99          * @param boolean $cache Use cached values?
 100          *
 101          * @return array uri data
 102          */
 103         public static function uri($uri, $network = "", $uid = 0, $cache = true) {
 104
 105                 if ($cache) {
 106                         $result = Cache::get("probe_url:".$network.":".$uri);
 107                         if (!is_null($result)) {
 108                                 $result = unserialize($result);
 109                                 return $result;
 110                         }
 111                 }
 112
 113                 if ($uid == 0)
 114                         $uid = local_user();
 115
 116                 $data = self::detect($uri, $network, $uid);
 117
 118                 if (!isset($data["url"]))
 119                         $data["url"] = $uri;
 120
 121                 if ($data["photo"] != "")
 122                         $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 123                 else
 124                         $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 125
 126                 if (!isset($data["name"]))
 127                         $data["name"] = $data["url"];
 128
 129                 if (!isset($data["nick"]))
 130                         $data["nick"] = strtolower($data["name"]);
 131
 132                 if (!isset($data["network"]))
 133                         $data["network"] = NETWORK_PHANTOM;
 134
 135                 $data = self::rearrange_data($data);
 136
 137                 // Only store into the cache if the value seems to be valid
 138                 if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
 139                         Cache::set("probe_url:".$network.":".$uri,serialize($data), CACHE_DAY);
 140
 141                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 142                         /// The biggest problem is the avatar picture that could have a reduced image size.
 143                         /// It should only be updated if the existing picture isn't existing anymore.
 144                         if (($data['network'] != NETWORK_FEED) AND ($mode == PROBE_NORMAL) AND
 145                                 $data["name"] AND $data["nick"] AND $data["url"] AND $data["addr"] AND $data["poll"])
 146                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 147                                                 `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
 148                                         WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
 149                                         dbesc($data["name"]),
 150                                         dbesc($data["nick"]),
 151                                         dbesc($data["url"]),
 152                                         dbesc($data["addr"]),
 153                                         dbesc($data["notify"]),
 154                                         dbesc($data["poll"]),
 155                                         dbesc($data["alias"]),
 156                                         dbesc(datetime_convert()),
 157                                         dbesc(normalise_link($data['url']))
 158                         );
 159                 }
 160                 return $data;
 161         }
 162
 163         /**
 164          * @brief Detect information about a given uri
 165          *
 166          * @param string $uri Address that should be probed
 167          * @param string $network Test for this specific network
 168          * @param integer $uid User ID for the probe (only used for mails)
 169          *
 170          * @return array uri data
 171          */
 172         private function detect($uri, $network, $uid) {
 173                 if (strstr($uri, '@')) {
 174                         // If the URI starts with "mailto:" then jum directly to the mail detection
 175                         if (strpos($url,'mailto:') !== false) {
 176                                 $uri = str_replace('mailto:', '', $url);
 177                                 return self::mail($uri, $uid);
 178                         }
 179
 180                         if ($network == NETWORK_MAIL)
 181                                 return self::mail($uri, $uid);
 182
 183                         // Remove "acct:" from the URI
 184                         $uri = str_replace('acct:', '', $uri);
 185
 186                         $host = substr($uri,strpos($uri, '@') + 1);
 187                         $nick = substr($uri,0, strpos($uri, '@'));
 188
 189                         $lrdd = self::xrd($host);
 190                         if (!$lrdd)
 191                                 return self::mail($uri, $uid);
 192
 193                         $addr = $uri;
 194                 } else {
 195                         $parts = parse_url($uri);
 196                         if (!isset($parts["scheme"]) OR
 197                                 !isset($parts["host"]) OR
 198                                 !isset($parts["path"]))
 199                                 return false;
 200
 201                         // todo: Ports?
 202                         $host = $parts["host"];
 203                         $lrdd = self::xrd($host);
 204
 205                         $path_parts = explode("/", trim($parts["path"], "/"));
 206
 207                         while (!$lrdd AND (sizeof($path_parts) > 1)) {
 208                                 $host .= "/".array_shift($path_parts);
 209                                 $lrdd = self::xrd($host);
 210                         }
 211                         if (!$lrdd)
 212                                 return self::feed($uri);
 213
 214                         $nick = array_pop($path_parts);
 215                         $addr = $nick."@".$host;
 216                 }
 217
 218                 $webfinger = false;
 219
 220                 /// @todo Do we need the prefix "acct:" or "acct://"?
 221
 222                 foreach ($lrdd AS $key => $link) {
 223                         if ($webfinger)
 224                                 continue;
 225
 226                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json")))
 227                                 continue;
 228
 229                         $path = str_replace('{uri}', urlencode($addr), $link);
 230
 231                         $webfinger = self::webfinger($path);
 232                 }
 233                 if (!$webfinger)
 234                         return self::feed($uri);
 235
 236                 $result = false;
 237
 238                 logger("Probing ".$uri, LOGGER_DEBUG);
 239
 240                 if (in_array($network, array("", NETWORK_DFRN)))
 241                         $result = self::dfrn($webfinger);
 242                 if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA))
 243                         $result = self::diaspora($webfinger);
 244                 if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS))
 245                         $result = self::ostatus($webfinger);
 246                 if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO))
 247                         $result = self::pumpio($webfinger);
 248                 if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED))
 249                         $result = self::feed($uri);
 250                 else {
 251                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 252                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 253                         if (!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " ")))
 254                                 $result["nick"] = $nick;
 255
 256                         if (!isset($result["addr"]) OR ($result["addr"] == ""))
 257                                 $result["addr"] = $addr;
 258                 }
 259
 260                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 261
 262                 if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
 263                         $pos = strpos($result["url"], $host);
 264                         if ($pos)
 265                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 266                 }
 267
 268                 return $result;
 269         }
 270
 271         /**
 272          * @brief Do a webfinger request
 273          *
 274          * @param string $url Address that should be probed
 275          *
 276          * @return array webfinger data
 277          */
 278         private function webfinger($url) {
 279
 280                 $xrd_timeout = Config::get('system','xrd_timeout', 20);
 281                 $redirects = 0;
 282
 283                 $data = fetch_url($url, false, $redirects, $xrd_timeout, "application/xrd+xml");
 284                 $xrd = parse_xml_string($data, false);
 285
 286                 if (!is_object($xrd)) {
 287                         // If it is not XML, maybe it is JSON
 288                         $webfinger = json_decode($data, true);
 289
 290                         if (!isset($webfinger["links"]))
 291                                 return false;
 292
 293                         return $webfinger;
 294                 }
 295
 296                 $xrd_arr = xml::element_to_array($xrd);
 297                 if (!isset($xrd_arr["xrd"]["link"]))
 298                         return false;
 299
 300                 $webfinger = array();
 301
 302                 if (isset($xrd_arr["xrd"]["subject"]))
 303                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 304
 305                 if (isset($xrd_arr["xrd"]["alias"]))
 306                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 307
 308                 $webfinger["links"] = array();
 309
 310                 foreach ($xrd_arr["xrd"]["link"] AS $value => $data) {
 311                         if (isset($data["@attributes"]))
 312                                 $attributes = $data["@attributes"];
 313                         elseif ($value == "@attributes")
 314                                 $attributes = $data;
 315                         else
 316                                 continue;
 317
 318                         $webfinger["links"][] = $attributes;
 319                 }
 320                 return $webfinger;
 321         }
 322
 323         /**
 324          * @brief Poll the noscrape page (Friendica specific)
 325          *
 326          * @param string $noscrape Link to the noscrape page
 327          * @param array $data The already fetched data
 328          *
 329          * @return array noscrape data
 330          */
 331         private function poll_noscrape($noscrape, $data) {
 332                 $content = fetch_url($noscrape);
 333                 if (!$content)
 334                         return false;
 335
 336                 $json = json_decode($content, true);
 337                 if (!is_array($json))
 338                         return false;
 339
 340                 if (isset($json["fn"]))
 341                         $data["name"] = $json["fn"];
 342
 343                 if (isset($json["addr"]))
 344                         $data["addr"] = $json["addr"];
 345
 346                 if (isset($json["nick"]))
 347                         $data["nick"] = $json["nick"];
 348
 349                 if (isset($json["comm"]))
 350                         $data["community"] = $json["comm"];
 351
 352                 if (isset($json["tags"])) {
 353                         $keywords = implode(" ", $json["tags"]);
 354                         if ($keywords != "")
 355                                 $data["keywords"] = $keywords;
 356                 }
 357
 358                 $location = formatted_location($json);
 359                 if ($location)
 360                         $data["location"] = $location;
 361
 362                 if (isset($json["about"]))
 363                         $data["about"] = $json["about"];
 364
 365                 if (isset($json["key"]))
 366                         $data["pubkey"] = $json["key"];
 367
 368                 if (isset($json["photo"]))
 369                         $data["photo"] = $json["photo"];
 370
 371                 if (isset($json["dfrn-request"]))
 372                         $data["request"] = $json["dfrn-request"];
 373
 374                 if (isset($json["dfrn-confirm"]))
 375                         $data["confirm"] = $json["dfrn-confirm"];
 376
 377                 if (isset($json["dfrn-notify"]))
 378                         $data["notify"] = $json["dfrn-notify"];
 379
 380                 if (isset($json["dfrn-poll"]))
 381                         $data["poll"] = $json["dfrn-poll"];
 382
 383                 return $data;
 384         }
 385
 386         /**
 387          * @brief Check for valid DFRN data
 388          *
 389          * @param array $data DFRN data
 390          *
 391          * @return int Number of errors
 392          */
 393         public static function valid_dfrn($data) {
 394                 $errors = 0;
 395                 if(!isset($data['key']))
 396                         $errors ++;
 397                 if(!isset($data['dfrn-request']))
 398                         $errors ++;
 399                 if(!isset($data['dfrn-confirm']))
 400                         $errors ++;
 401                 if(!isset($data['dfrn-notify']))
 402                         $errors ++;
 403                 if(!isset($data['dfrn-poll']))
 404                         $errors ++;
 405                 return $errors;
 406         }
 407
 408         /**
 409          * @brief Fetch data from a DFRN profile page
 410          *
 411          * @param string $profile Link to the profile page
 412          *
 413          * @return array profile data
 414          */
 415         public static function profile($profile) {
 416
 417                 $data = array();
 418
 419                 // Fetch data via noscrape - this is faster
 420                 $noscrape = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile);
 421                 $data = self::poll_noscrape($noscrape, $data);
 422
 423                 if (!isset($data["notify"]) OR !isset($data["confirm"]) OR
 424                         !isset($data["request"]) OR !isset($data["poll"]) OR
 425                         !isset($data["poco"]) OR !isset($data["name"]) OR
 426                         !isset($data["photo"]))
 427                         $data = self::poll_hcard($profile, $data, true);
 428
 429                 $prof_data = array();
 430                 $prof_data["addr"] = $data["addr"];
 431                 $prof_data["nick"] = $data["nick"];
 432                 $prof_data["dfrn-request"] = $data["request"];
 433                 $prof_data["dfrn-confirm"] = $data["confirm"];
 434                 $prof_data["dfrn-notify"] = $data["notify"];
 435                 $prof_data["dfrn-poll"] = $data["poll"];
 436                 $prof_data["dfrn-poco"] = $data["poco"];
 437                 $prof_data["photo"] = $data["photo"];
 438                 $prof_data["fn"] = $data["name"];
 439                 $prof_data["key"] = $data["pubkey"];
 440
 441                 return $prof_data;
 442         }
 443
 444         /**
 445          * @brief Check for DFRN contact
 446          *
 447          * @param array $webfinger Webfinger data
 448          *
 449          * @return array DFRN data
 450          */
 451         private function dfrn($webfinger) {
 452
 453                 $hcard = "";
 454                 $data = array();
 455                 foreach ($webfinger["links"] AS $link) {
 456                         if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != ""))
 457                                 $data["network"] = NETWORK_DFRN;
 458                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 459                                 $data["poll"] = $link["href"];
 460                         elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 461                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 462                                 $data["url"] = $link["href"];
 463                         elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
 464                                 $hcard = $link["href"];
 465                         elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
 466                                 $data["poco"] = $link["href"];
 467                         elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != ""))
 468                                 $data["photo"] = $link["href"];
 469
 470                         elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
 471                                 $data["baseurl"] = trim($link["href"], '/');
 472                         elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
 473                                 $data["guid"] = $link["href"];
 474                         elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 475                                 $data["pubkey"] = base64_decode($link["href"]);
 476
 477                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 478                                 if (strstr($data["pubkey"], 'RSA '))
 479                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 480                         }
 481                 }
 482
 483                 if (!isset($data["network"]) OR ($hcard == ""))
 484                         return false;
 485
 486                 // Fetch data via noscrape - this is faster
 487                 $noscrape = str_replace("/hcard/", "/noscrape/", $hcard);
 488                 $data = self::poll_noscrape($noscrape, $data);
 489
 490                 if (isset($data["notify"]) AND isset($data["confirm"]) AND isset($data["request"]) AND
 491                         isset($data["poll"]) AND isset($data["name"]) AND isset($data["photo"]))
 492                         return $data;
 493
 494                 $data = self::poll_hcard($hcard, $data, true);
 495
 496                 return $data;
 497         }
 498
 499         /**
 500          * @brief Poll the hcard page (Diaspora and Friendica specific)
 501          *
 502          * @param string $hcard Link to the hcard page
 503          * @param array $data The already fetched data
 504          * @param boolean $dfrn Poll DFRN specific data
 505          *
 506          * @return array hcard data
 507          */
 508         private function poll_hcard($hcard, $data, $dfrn = false) {
 509
 510                 $doc = new DOMDocument();
 511                 if (!@$doc->loadHTMLFile($hcard))
 512                         return false;
 513
 514                 $xpath = new DomXPath($doc);
 515
 516                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
 517                 if (!is_object($vcards))
 518                         return false;
 519
 520                 if ($vcards->length == 0)
 521                         return false;
 522
 523                 $vcard = $vcards->item(0);
 524
 525                 // We have to discard the guid from the hcard in favour of the guid from lrdd
 526                 // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 527                 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
 528                 if (($search->length > 0) AND ($data["guid"] == ""))
 529                         $data["guid"] = $search->item(0)->nodeValue;
 530
 531                 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
 532                 if ($search->length > 0)
 533                         $data["nick"] = $search->item(0)->nodeValue;
 534
 535                 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
 536                 if ($search->length > 0)
 537                         $data["name"] = $search->item(0)->nodeValue;
 538
 539                 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 540                 if ($search->length > 0)
 541                         $data["searchable"] = $search->item(0)->nodeValue;
 542
 543                 $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
 544                 if ($search->length > 0) {
 545                         $data["pubkey"] = $search->item(0)->nodeValue;
 546                         if (strstr($data["pubkey"], 'RSA '))
 547                                 $data["pubkey"] = rsatopem($data["pubkey"]);
 548                 }
 549
 550                 $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
 551                 if ($search->length > 0)
 552                         $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
 553
 554                 $avatar = array();
 555                 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 556                 foreach ($photos AS $photo) {
 557                         $attr = array();
 558                         foreach ($photo->attributes as $attribute)
 559                                 $attr[$attribute->name] = trim($attribute->value);
 560
 561                         if (isset($attr["src"]) AND isset($attr["width"]))
 562                                 $avatar[$attr["width"]] = $attr["src"];
 563                 }
 564
 565                 if (sizeof($avatar)) {
 566                         ksort($avatar);
 567                         $data["photo"] = array_pop($avatar);
 568                 }
 569
 570                 if ($dfrn) {
 571                         // Poll DFRN specific data
 572                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
 573                         if ($search->length > 0) {
 574                                 foreach ($search AS $link) {
 575                                         //$data["request"] = $search->item(0)->nodeValue;
 576                                         $attr = array();
 577                                         foreach ($link->attributes as $attribute)
 578                                                 $attr[$attribute->name] = trim($attribute->value);
 579
 580                                         $data[substr($attr["rel"], 5)] = $attr["href"];
 581                                 }
 582                         }
 583
 584                         // Older Friendica versions had used the "uid" field differently than newer versions
 585                         if ($data["nick"] == $data["guid"])
 586                                 unset($data["guid"]);
 587                 }
 588
 589
 590                 return $data;
 591         }
 592
 593         /**
 594          * @brief Check for Diaspora contact
 595          *
 596          * @param array $webfinger Webfinger data
 597          *
 598          * @return array Diaspora data
 599          */
 600         private function diaspora($webfinger) {
 601
 602                 $hcard = "";
 603                 $data = array();
 604                 foreach ($webfinger["links"] AS $link) {
 605                         if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
 606                                 $hcard = $link["href"];
 607                         elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
 608                                 $data["baseurl"] = trim($link["href"], '/');
 609                         elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
 610                                 $data["guid"] = $link["href"];
 611                         elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 612                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 613                                 $data["url"] = $link["href"];
 614                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 615                                 $data["poll"] = $link["href"];
 616                         elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
 617                                 $data["poco"] = $link["href"];
 618                         elseif (($link["rel"] == "salmon") AND ($link["href"] != ""))
 619                                 $data["notify"] = $link["href"];
 620                         elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 621                                 $data["pubkey"] = base64_decode($link["href"]);
 622
 623                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 624                                 if (strstr($data["pubkey"], 'RSA '))
 625                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 626                         }
 627                 }
 628
 629                 if (!isset($data["url"]) OR ($hcard == ""))
 630                         return false;
 631
 632                 if (is_array($webfinger["aliases"]))
 633                         foreach ($webfinger["aliases"] AS $alias)
 634                                 if (normalise_link($alias) != normalise_link($data["url"]) AND !strstr($alias, "@"))
 635                                         $data["alias"] = $alias;
 636
 637                 // Fetch further information from the hcard
 638                 $data = self::poll_hcard($hcard, $data);
 639
 640                 if (!$data)
 641                         return false;
 642
 643                 if (isset($data["url"]) AND isset($data["guid"]) AND isset($data["baseurl"]) AND
 644                         isset($data["pubkey"]) AND ($hcard != "")) {
 645                         $data["network"] = NETWORK_DIASPORA;
 646
 647                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
 648                         $data["notify"] = $data["baseurl"]."/receive/users/".$data["guid"];
 649                         $data["batch"] = $data["baseurl"]."/receive/public";
 650                 } else
 651                         return false;
 652
 653                 return $data;
 654         }
 655
 656         /**
 657          * @brief Check for OStatus contact
 658          *
 659          * @param array $webfinger Webfinger data
 660          *
 661          * @return array OStatus data
 662          */
 663         private function ostatus($webfinger) {
 664
 665                 $pubkey = "";
 666                 $data = array();
 667                 foreach ($webfinger["links"] AS $link) {
 668                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 669                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 670                                 $data["url"] = $link["href"];
 671                         elseif (($link["rel"] == "salmon") AND ($link["href"] != ""))
 672                                 $data["notify"] = $link["href"];
 673                         elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
 674                                 $data["poll"] = $link["href"];
 675                         elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
 676                                 $pubkey = $link["href"];
 677
 678                                 if (substr($pubkey, 0, 5) === 'data:') {
 679                                         if (strstr($pubkey, ','))
 680                                                 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
 681                                         else
 682                                                 $pubkey = substr($pubkey, 5);
 683                                 } else
 684                                         $pubkey = fetch_url($pubkey);
 685
 686                                 $key = explode(".", $pubkey);
 687
 688                                 if (sizeof($key) >= 3) {
 689                                         $m = base64url_decode($key[1]);
 690                                         $e = base64url_decode($key[2]);
 691                                         $data["pubkey"] = metopem($m,$e);
 692                                 }
 693
 694                         }
 695                 }
 696
 697                 if (isset($data["notify"]) AND isset($data["pubkey"]) AND
 698                         isset($data["poll"]) AND isset($data["url"])) {
 699                         $data["network"] = NETWORK_OSTATUS;
 700                 } else
 701                         return false;
 702
 703                 // Fetch all additional data from the feed
 704                 $feed = fetch_url($data["poll"]);
 705                 $feed_data = feed_import($feed,$dummy1,$dummy2, $dummy3, true);
 706                 if (!$feed_data)
 707                         return false;
 708
 709                 if ($feed_data["header"]["author-name"] != "")
 710                         $data["name"] = $feed_data["header"]["author-name"];
 711
 712                 if ($feed_data["header"]["author-nick"] != "")
 713                         $data["nick"] = $feed_data["header"]["author-nick"];
 714
 715                 if ($feed_data["header"]["author-avatar"] != "")
 716                         $data["photo"] = $feed_data["header"]["author-avatar"];
 717
 718                 if ($feed_data["header"]["author-id"] != "")
 719                         $data["alias"] = $feed_data["header"]["author-id"];
 720
 721                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
 722                 // So we take the value that we just fetched, although the other one worked as well
 723                 if ($feed_data["header"]["author-link"] != "")
 724                         $data["url"] = $feed_data["header"]["author-link"];
 725
 726                 /// @todo Fetch location and "about" from the feed as well
 727                 return $data;
 728         }
 729
 730         /**
 731          * @brief Fetch data from a pump.io profile page
 732          *
 733          * @param string $profile Link to the profile page
 734          *
 735          * @return array profile data
 736          */
 737         private function pumpio_profile_data($profile) {
 738
 739                 $doc = new DOMDocument();
 740                 if (!@$doc->loadHTMLFile($profile))
 741                         return false;
 742
 743                 $xpath = new DomXPath($doc);
 744
 745                 $data = array();
 746
 747                 // This is ugly - but pump.io doesn't seem to know a better way for it
 748                 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
 749                 $pos = strpos($data["name"], chr(10));
 750                 if ($pos)
 751                         $data["name"] = trim(substr($data["name"], 0, $pos));
 752
 753                 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
 754                 if ($avatar)
 755                         foreach ($avatar->attributes as $attribute)
 756                                 if ($attribute->name == "src")
 757                                         $data["photo"] = trim($attribute->value);
 758
 759                 $data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
 760                 $data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
 761
 762                 return $data;
 763         }
 764
 765         /**
 766          * @brief Check for pump.io contact
 767          *
 768          * @param array $webfinger Webfinger data
 769          *
 770          * @return array pump.io data
 771          */
 772         private function pumpio($webfinger) {
 773                 $data = array();
 774                 foreach ($webfinger["links"] AS $link) {
 775                         if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
 776                                 ($link["type"] == "text/html") AND ($link["href"] != ""))
 777                                 $data["url"] = $link["href"];
 778                         elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != ""))
 779                                 $data["activity-inbox"] = $link["href"];
 780                         elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != ""))
 781                                 $data["activity-outbox"] = $link["href"];
 782                         elseif (($link["rel"] == "dialback") AND ($link["href"] != ""))
 783                                 $data["dialback"] = $link["href"];
 784                 }
 785                 if (isset($data["activity-inbox"]) AND isset($data["activity-outbox"]) AND
 786                         isset($data["dialback"]) AND isset($data["url"])) {
 787
 788                         // by now we use these fields only for the network type detection
 789                         // So we unset all data that isn't used at the moment
 790                         unset($data["activity-inbox"]);
 791                         unset($data["activity-outbox"]);
 792                         unset($data["dialback"]);
 793
 794                         $data["network"] = NETWORK_PUMPIO;
 795                 } else
 796                         return false;
 797
 798                 $profile_data = self::pumpio_profile_data($data["url"]);
 799
 800                 if (!$profile_data)
 801                         return false;
 802
 803                 $data = array_merge($data, $profile_data);
 804
 805                 return $data;
 806         }
 807
 808         /**
 809          * @brief Check page for feed link
 810          *
 811          * @param string $url Page link
 812          *
 813          * @return string feed link
 814          */
 815         private function get_feed_link($url) {
 816                 $doc = new DOMDocument();
 817
 818                 if (!@$doc->loadHTMLFile($url))
 819                         return false;
 820
 821                 $xpath = new DomXPath($doc);
 822
 823                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
 824                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
 825                 if (!is_object($feeds))
 826                         return false;
 827
 828                 if ($feeds->length == 0)
 829                         return false;
 830
 831                 $feed_url = "";
 832
 833                 foreach ($feeds AS $feed) {
 834                         $attr = array();
 835                         foreach ($feed->attributes as $attribute)
 836                         $attr[$attribute->name] = trim($attribute->value);
 837
 838                         if ($feed_url == "")
 839                                 $feed_url = $attr["href"];
 840                 }
 841
 842                 return $feed_url;
 843         }
 844
 845         /**
 846          * @brief Check for feed contact
 847          *
 848          * @param string $url Profile link
 849          * @param boolean $probe Do a probe if the page contains a feed link
 850          *
 851          * @return array feed data
 852          */
 853         private function feed($url, $probe = true) {
 854                 $feed = fetch_url($url);
 855                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
 856
 857                 if (!$feed_data) {
 858                         if (!$probe)
 859                                 return false;
 860
 861                         $feed_url = self::get_feed_link($url);
 862
 863                         if (!$feed_url)
 864                                 return false;
 865
 866                         return self::feed($feed_url, false);
 867                 }
 868
 869                 if ($feed_data["header"]["author-name"] != "")
 870                         $data["name"] = $feed_data["header"]["author-name"];
 871
 872                 if ($feed_data["header"]["author-nick"] != "")
 873                         $data["nick"] = $feed_data["header"]["author-nick"];
 874
 875                 if ($feed_data["header"]["author-avatar"] != "")
 876                         $data["photo"] = $feed_data["header"]["author-avatar"];
 877
 878                 if ($feed_data["header"]["author-id"] != "")
 879                         $data["alias"] = $feed_data["header"]["author-id"];
 880
 881                 $data["url"] = $url;
 882                 $data["poll"] = $url;
 883
 884                 if ($feed_data["header"]["author-link"] != "")
 885                         $data["baseurl"] = $feed_data["header"]["author-link"];
 886                 else
 887                         $data["baseurl"] = $data["url"];
 888
 889                 $data["network"] = NETWORK_FEED;
 890
 891                 return $data;
 892         }
 893
 894         /**
 895          * @brief Check for mail contact
 896          *
 897          * @param string $uri Profile link
 898          * @param integer $uid User ID
 899          *
 900          * @return array mail data
 901          */
 902         private function mail($uri, $uid) {
 903
 904                 if (!validate_email($uri))
 905                         return false;
 906
 907                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
 908
 909                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
 910
 911                 if(count($x) && count($r)) {
 912                         $mailbox = construct_mailbox_name($r[0]);
 913                         $password = '';
 914                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password,$x[0]['prvkey']);
 915                         $mbox = email_connect($mailbox,$r[0]['user'], $password);
 916                         if(!mbox)
 917                                 return false;
 918                 }
 919
 920                 $msgs = email_poll($mbox, $uri);
 921                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
 922
 923                 if (!count($msgs))
 924                         return false;
 925
 926                 $data = array();
 927
 928                 $data["addr"] = $uri;
 929                 $data["network"] = NETWORK_MAIL;
 930                 $data["name"] = substr($uri, 0, strpos($uri,'@'));
 931                 $data["nick"] = $data["name"];
 932                 $data["photo"] = avatar_img($uri);
 933
 934                 $phost = substr($uri, strpos($uri,'@') + 1);
 935                 $data["url"] = 'http://'.$phost."/".$data["nick"];
 936                 $data["notify"] = 'smtp '.random_string();
 937                 $data["poll"] = 'email '.random_string();
 938
 939                 $x = email_msg_meta($mbox, $msgs[0]);
 940                 if(stristr($x[0]->from, $uri))
 941                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
 942                 elseif(stristr($x[0]->to, $uri))
 943                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
 944                 if(isset($adr)) {
 945                         foreach($adr as $feadr) {
 946                                 if((strcasecmp($feadr->mailbox, $data["name"]) == 0)
 947                                         &&(strcasecmp($feadr->host, $phost) == 0)
 948                                         && (strlen($feadr->personal))) {
 949
 950                                         $personal = imap_mime_header_decode($feadr->personal);
 951                                         $data["name"] = "";
 952                                         foreach($personal as $perspart)
 953                                                 if ($perspart->charset != "default")
 954                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
 955                                                 else
 956                                                         $data["name"] .= $perspart->text;
 957
 958                                         $data["name"] = notags($data["name"]);
 959                                 }
 960                         }
 961                 }
 962                 imap_close($mbox);
 963
 964                 return $data;
 965         }
 966 }
 967 ?>