src/Network/Probe.php

   1 <?php
   2
   3 namespace Friendica\Network;
   4
   5 /**
   6  * @file src/Network/Probe.php
   7  * @brief Functions for probing URL
   8  *
   9  */
  10
  11 use Friendica\App;
  12 use Friendica\Core\Config;
  13
  14 use dbm;
  15 use Cache;
  16 use xml;
  17
  18 use DomXPath;
  19 use DOMDocument;
  20
  21 require_once 'include/feed.php';
  22 require_once 'include/email.php';
  23 require_once 'include/network.php';
  24
  25 /**
  26  * @brief This class contain functions for probing URL
  27  *
  28  */
  29 class Probe {
  30
  31         private static $baseurl;
  32
  33         /**
  34          * @brief Rearrange the array so that it always has the same order
  35          *
  36          * @param array $data Unordered data
  37          *
  38          * @return array Ordered data
  39          */
  40         private function rearrangeData($data) {
  41                 $fields = array("name", "nick", "guid", "url", "addr", "alias",
  42                                 "photo", "community", "keywords", "location", "about",
  43                                 "batch", "notify", "poll", "request", "confirm", "poco",
  44                                 "priority", "network", "pubkey", "baseurl");
  45
  46                 $newdata = array();
  47                 foreach ($fields as $field) {
  48                         if (isset($data[$field])) {
  49                                 $newdata[$field] = $data[$field];
  50                         } else {
  51                                 $newdata[$field] = "";
  52                         }
  53                 }
  54
  55                 // We don't use the "priority" field anymore and replace it with a dummy.
  56                 $newdata["priority"] = 0;
  57
  58                 return $newdata;
  59         }
  60
  61         /**
  62          * @brief Probes for XRD data
  63          *
  64          * @param string $host The host part of an url
  65          *
  66          * @return array
  67          *      'lrdd' => Link to LRDD endpoint
  68          *      'lrdd-xml' => Link to LRDD endpoint in XML format
  69          *      'lrdd-json' => Link to LRDD endpoint in JSON format
  70          */
  71         private function xrd($host) {
  72
  73                 // Reset the static variable
  74                 self::$baseurl = '';
  75
  76                 $ssl_url = "https://".$host."/.well-known/host-meta";
  77                 $url = "http://".$host."/.well-known/host-meta";
  78
  79                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
  80                 $redirects = 0;
  81
  82                 logger("Probing for ".$host, LOGGER_DEBUG);
  83
  84                 $ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  85                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  86                         logger("Probing timeout for ".$ssl_url, LOGGER_DEBUG);
  87                         return false;
  88                 }
  89                 $xml = $ret['body'];
  90
  91                 $xrd = parse_xml_string($xml, false);
  92
  93                 if (!is_object($xrd)) {
  94                         $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
  95                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
  96                                 logger("Probing timeout for ".$url, LOGGER_DEBUG);
  97                                 return false;
  98                         }
  99                         $xml = $ret['body'];
 100                         $xrd = parse_xml_string($xml, false);
 101                 }
 102                 if (!is_object($xrd)) {
 103                         logger("No xrd object found for ".$host, LOGGER_DEBUG);
 104                         return false;
 105                 }
 106
 107                 $links = xml::element_to_array($xrd);
 108                 if (!isset($links["xrd"]["link"])) {
 109                         logger("No xrd data found for ".$host, LOGGER_DEBUG);
 110                         return false;
 111                 }
 112
 113                 $xrd_data = array();
 114
 115                 foreach ($links["xrd"]["link"] as $value => $link) {
 116                         if (isset($link["@attributes"])) {
 117                                 $attributes = $link["@attributes"];
 118                         } elseif ($value == "@attributes") {
 119                                 $attributes = $link;
 120                         } else {
 121                                 continue;
 122                         }
 123
 124                         if (($attributes["rel"] == "lrdd")
 125                                 AND ($attributes["type"] == "application/xrd+xml")
 126                         ) {
 127                                 $xrd_data["lrdd-xml"] = $attributes["template"];
 128                         } elseif (($attributes["rel"] == "lrdd")
 129                                 AND ($attributes["type"] == "application/json")
 130                         ) {
 131                                 $xrd_data["lrdd-json"] = $attributes["template"];
 132                         } elseif ($attributes["rel"] == "lrdd") {
 133                                 $xrd_data["lrdd"] = $attributes["template"];
 134                         }
 135                 }
 136
 137                 self::$baseurl = "http://".$host;
 138
 139                 logger("Probing successful for ".$host, LOGGER_DEBUG);
 140
 141                 return $xrd_data;
 142         }
 143
 144         /**
 145          * @brief Perform Webfinger lookup and return DFRN data
 146          *
 147          * Given an email style address, perform webfinger lookup and
 148          * return the resulting DFRN profile URL, or if no DFRN profile URL
 149          * is located, returns an OStatus subscription template (prefixed
 150          * with the string 'stat:' to identify it as on OStatus template).
 151          * If this isn't an email style address just return $webbie.
 152          * Return an empty string if email-style addresses but webfinger fails,
 153          * or if the resultant personal XRD doesn't contain a supported
 154          * subscription/friend-request attribute.
 155          *
 156          * amended 7/9/2011 to return an hcard which could save potentially loading
 157          * a lengthy content page to scrape dfrn attributes
 158          *
 159          * @param string $webbie Address that should be probed
 160          * @param string $hcard_url Link to the hcard - is returned by reference
 161          *
 162          * @return string profile link
 163          */
 164
 165         public static function webfingerDfrn($webbie, &$hcard_url) {
 166
 167                 $profile_link = '';
 168
 169                 $links = self::lrdd($webbie);
 170                 logger('webfingerDfrn: '.$webbie.':'.print_r($links, true), LOGGER_DATA);
 171                 if (count($links)) {
 172                         foreach ($links as $link) {
 173                                 if ($link['@attributes']['rel'] === NAMESPACE_DFRN) {
 174                                         $profile_link = $link['@attributes']['href'];
 175                                 }
 176                                 if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == "")) {
 177                                         $profile_link = 'stat:'.$link['@attributes']['template'];
 178                                 }
 179                                 if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard') {
 180                                         $hcard_url = $link['@attributes']['href'];
 181                                 }
 182                         }
 183                 }
 184                 return $profile_link;
 185         }
 186
 187         /**
 188          * @brief Check an URI for LRDD data
 189          *
 190          * this is a replacement for the "lrdd" function in include/network.php.
 191          * It isn't used in this class and has some redundancies in the code.
 192          * When time comes we can check the existing calls for "lrdd" if we can rework them.
 193          *
 194          * @param string $uri Address that should be probed
 195          *
 196          * @return array uri data
 197          */
 198         public static function lrdd($uri) {
 199
 200                 $lrdd = self::xrd($uri);
 201                 $webfinger = null;
 202
 203                 if (!$lrdd) {
 204                         $parts = @parse_url($uri);
 205                         if (!$parts) {
 206                                 return array();
 207                         }
 208
 209                         $host = $parts["host"];
 210                         if (isset($parts["port"])) {
 211                                 $host .= ':'.$parts["port"];
 212                         }
 213
 214                         $path_parts = explode("/", trim($parts["path"], "/"));
 215
 216                         $nick = array_pop($path_parts);
 217
 218                         do {
 219                                 $lrdd = self::xrd($host);
 220                                 $host .= "/".array_shift($path_parts);
 221                         } while (!$lrdd AND (sizeof($path_parts) > 0));
 222                 }
 223
 224                 if (!$lrdd) {
 225                         logger("No lrdd data found for ".$uri, LOGGER_DEBUG);
 226                         return array();
 227                 }
 228
 229                 foreach ($lrdd as $key => $link) {
 230                         if ($webfinger) {
 231                                 continue;
 232                         }
 233
 234                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 235                                 continue;
 236                         }
 237
 238                         $path = str_replace('{uri}', urlencode($uri), $link);
 239                         $webfinger = self::webfinger($path);
 240
 241                         if (!$webfinger AND (strstr($uri, "@"))) {
 242                                 $path = str_replace('{uri}', urlencode("acct:".$uri), $link);
 243                                 $webfinger = self::webfinger($path);
 244                         }
 245
 246                         // Special treatment for Mastodon
 247                         // Problem is that Mastodon uses an URL format like http://domain.tld/@nick
 248                         // But the webfinger for this format fails.
 249                         if (!$webfinger AND isset($nick)) {
 250                                 // Mastodon uses a "@" as prefix for usernames in their url format
 251                                 $nick = ltrim($nick, '@');
 252
 253                                 $addr = $nick."@".$host;
 254
 255                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 256                                 $webfinger = self::webfinger($path);
 257                         }
 258                 }
 259
 260                 if (!is_array($webfinger["links"])) {
 261                         logger("No webfinger links found for ".$uri, LOGGER_DEBUG);
 262                         return false;
 263                 }
 264
 265                 $data = array();
 266
 267                 foreach ($webfinger["links"] as $link) {
 268                         $data[] = array("@attributes" => $link);
 269                 }
 270
 271                 if (is_array($webfinger["aliases"])) {
 272                         foreach ($webfinger["aliases"] as $alias) {
 273                                 $data[] = array("@attributes" =>
 274                                                         array("rel" => "alias",
 275                                                                 "href" => $alias));
 276                         }
 277                 }
 278
 279                 return $data;
 280         }
 281
 282         /**
 283          * @brief Fetch information (protocol endpoints and user information) about a given uri
 284          *
 285          * @param string $uri Address that should be probed
 286          * @param string $network Test for this specific network
 287          * @param integer $uid User ID for the probe (only used for mails)
 288          * @param boolean $cache Use cached values?
 289          *
 290          * @return array uri data
 291          */
 292         public static function uri($uri, $network = "", $uid = 0, $cache = true) {
 293
 294                 if ($cache) {
 295                         $result = Cache::get("probe_url:".$network.":".$uri);
 296                         if (!is_null($result)) {
 297                                 return $result;
 298                         }
 299                 }
 300
 301                 if ($uid == 0) {
 302                         $uid = local_user();
 303                 }
 304
 305                 $data = self::detect($uri, $network, $uid);
 306
 307                 if (!isset($data["url"])) {
 308                         $data["url"] = $uri;
 309                 }
 310
 311                 if ($data["photo"] != "") {
 312                         $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
 313                 } else {
 314                         $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
 315                 }
 316
 317                 if (!isset($data["name"]) OR ($data["name"] == "")) {
 318                         if (isset($data["nick"])) {
 319                                 $data["name"] = $data["nick"];
 320                         }
 321
 322                         if ($data["name"] == "") {
 323                                 $data["name"] = $data["url"];
 324                         }
 325                 }
 326
 327                 if (!isset($data["nick"]) OR ($data["nick"] == "")) {
 328                         $data["nick"] = strtolower($data["name"]);
 329
 330                         if (strpos($data['nick'], ' ')) {
 331                                 $data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
 332                         }
 333                 }
 334
 335                 if (self::$baseurl != "") {
 336                         $data["baseurl"] = self::$baseurl;
 337                 }
 338
 339                 if (!isset($data["network"])) {
 340                         $data["network"] = NETWORK_PHANTOM;
 341                 }
 342
 343                 $data = self::rearrangeData($data);
 344
 345                 // Only store into the cache if the value seems to be valid
 346                 if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
 347                         Cache::set("probe_url:".$network.":".$uri, $data, CACHE_DAY);
 348
 349                         /// @todo temporary fix - we need a real contact update function that updates only changing fields
 350                         /// The biggest problem is the avatar picture that could have a reduced image size.
 351                         /// It should only be updated if the existing picture isn't existing anymore.
 352                         /// We only update the contact when it is no probing for a specific network.
 353                         if (($data['network'] != NETWORK_FEED)
 354                                 AND ($network == "")
 355                                 AND $data["name"]
 356                                 AND $data["nick"]
 357                                 AND $data["url"]
 358                                 AND $data["addr"]
 359                                 AND $data["poll"]
 360                         ) {
 361                                 q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
 362                                                 `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
 363                                         WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
 364                                         dbesc($data["name"]),
 365                                         dbesc($data["nick"]),
 366                                         dbesc($data["url"]),
 367                                         dbesc($data["addr"]),
 368                                         dbesc($data["notify"]),
 369                                         dbesc($data["poll"]),
 370                                         dbesc($data["alias"]),
 371                                         dbesc(datetime_convert()),
 372                                         dbesc(normalise_link($data['url']))
 373                                 );
 374                         }
 375                 }
 376
 377                 return $data;
 378         }
 379
 380         /**
 381          * @brief Fetch information (protocol endpoints and user information) about a given uri
 382          *
 383          * This function is only called by the "uri" function that adds caching and rearranging of data.
 384          *
 385          * @param string $uri Address that should be probed
 386          * @param string $network Test for this specific network
 387          * @param integer $uid User ID for the probe (only used for mails)
 388          *
 389          * @return array uri data
 390          */
 391         private function detect($uri, $network, $uid) {
 392                 $parts = parse_url($uri);
 393
 394                 if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
 395                         $host = $parts["host"];
 396                         if (isset($parts["port"])) {
 397                                 $host .= ':'.$parts["port"];
 398                         }
 399
 400                         if ($host == 'twitter.com') {
 401                                 return array("network" => NETWORK_TWITTER);
 402                         }
 403                         $lrdd = self::xrd($host);
 404
 405                         $path_parts = explode("/", trim($parts["path"], "/"));
 406
 407                         while (!$lrdd AND (sizeof($path_parts) > 1)) {
 408                                 $host .= "/".array_shift($path_parts);
 409                                 $lrdd = self::xrd($host);
 410                         }
 411                         if (!$lrdd) {
 412                                 logger('No XRD data was found for '.$uri, LOGGER_DEBUG);
 413                                 return self::feed($uri);
 414                         }
 415                         $nick = array_pop($path_parts);
 416
 417                         // Mastodon uses a "@" as prefix for usernames in their url format
 418                         $nick = ltrim($nick, '@');
 419
 420                         $addr = $nick."@".$host;
 421
 422                 } elseif (strstr($uri, '@')) {
 423                         // If the URI starts with "mailto:" then jump directly to the mail detection
 424                         if (strpos($uri, 'mailto:') !== false) {
 425                                 $uri = str_replace('mailto:', '', $uri);
 426                                 return self::mail($uri, $uid);
 427                         }
 428
 429                         if ($network == NETWORK_MAIL) {
 430                                 return self::mail($uri, $uid);
 431                         }
 432                         // Remove "acct:" from the URI
 433                         $uri = str_replace('acct:', '', $uri);
 434
 435                         $host = substr($uri, strpos($uri, '@') + 1);
 436                         $nick = substr($uri, 0, strpos($uri, '@'));
 437
 438                         if (strpos($uri, '@twitter.com')) {
 439                                 return array("network" => NETWORK_TWITTER);
 440                         }
 441                         $lrdd = self::xrd($host);
 442
 443                         if (!$lrdd) {
 444                                 logger('No XRD data was found for '.$uri, LOGGER_DEBUG);
 445                                 return self::mail($uri, $uid);
 446                         }
 447                         $addr = $uri;
 448
 449                 } else {
 450                         logger("Uri ".$uri." was not detectable", LOGGER_DEBUG);
 451                         return false;
 452                 }
 453
 454                 $webfinger = false;
 455
 456                 /// @todo Do we need the prefix "acct:" or "acct://"?
 457
 458                 foreach ($lrdd as $key => $link) {
 459                         if ($webfinger) {
 460                                 continue;
 461                         }
 462                         if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
 463                                 continue;
 464                         }
 465                         // At first try it with the given uri
 466                         $path = str_replace('{uri}', urlencode($uri), $link);
 467                         $webfinger = self::webfinger($path);
 468
 469                         // We cannot be sure that the detected address was correct, so we don't use the values
 470                         if ($webfinger AND ($uri != $addr)) {
 471                                 $nick = "";
 472                                 $addr = "";
 473                         }
 474
 475                         // Try webfinger with the address (user@domain.tld)
 476                         if (!$webfinger) {
 477                                 $path = str_replace('{uri}', urlencode($addr), $link);
 478                                 $webfinger = self::webfinger($path);
 479                         }
 480
 481                         // Mastodon needs to have it with "acct:"
 482                         if (!$webfinger) {
 483                                 $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
 484                                 $webfinger = self::webfinger($path);
 485                         }
 486                 }
 487                 if (!$webfinger) {
 488                         return self::feed($uri);
 489                 }
 490
 491                 $result = false;
 492
 493                 logger("Probing ".$uri, LOGGER_DEBUG);
 494
 495                 if (in_array($network, array("", NETWORK_DFRN))) {
 496                         $result = self::dfrn($webfinger);
 497                 }
 498                 if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA)) {
 499                         $result = self::diaspora($webfinger);
 500                 }
 501                 if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS)) {
 502                         $result = self::ostatus($webfinger);
 503                 }
 504                 if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO)) {
 505                         $result = self::pumpio($webfinger);
 506                 }
 507                 if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED)) {
 508                         $result = self::feed($uri);
 509                 } else {
 510                         // We overwrite the detected nick with our try if the previois routines hadn't detected it.
 511                         // Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
 512                         if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != "")) {
 513                                 $result["nick"] = $nick;
 514                         }
 515
 516                         if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != "")) {
 517                                 $result["addr"] = $addr;
 518                         }
 519                 }
 520
 521                 logger($uri." is ".$result["network"], LOGGER_DEBUG);
 522
 523                 if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
 524                         $pos = strpos($result["url"], $host);
 525                         if ($pos) {
 526                                 $result["baseurl"] = substr($result["url"], 0, $pos).$host;
 527                         }
 528                 }
 529
 530                 return $result;
 531         }
 532
 533         /**
 534          * @brief Perform a webfinger request.
 535          *
 536          * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
 537          *
 538          * @param string $url Address that should be probed
 539          *
 540          * @return array webfinger data
 541          */
 542         private function webfinger($url) {
 543
 544                 $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
 545                 $redirects = 0;
 546
 547                 $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
 548                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 549                         return false;
 550                 }
 551                 $data = $ret['body'];
 552
 553                 $xrd = parse_xml_string($data, false);
 554
 555                 if (!is_object($xrd)) {
 556                         // If it is not XML, maybe it is JSON
 557                         $webfinger = json_decode($data, true);
 558
 559                         if (!isset($webfinger["links"])) {
 560                                 logger("No json webfinger links for ".$url, LOGGER_DEBUG);
 561                                 return false;
 562                         }
 563
 564                         return $webfinger;
 565                 }
 566
 567                 $xrd_arr = xml::element_to_array($xrd);
 568                 if (!isset($xrd_arr["xrd"]["link"])) {
 569                         logger("No XML webfinger links for ".$url, LOGGER_DEBUG);
 570                         return false;
 571                 }
 572
 573                 $webfinger = array();
 574
 575                 if (isset($xrd_arr["xrd"]["subject"])) {
 576                         $webfinger["subject"] = $xrd_arr["xrd"]["subject"];
 577                 }
 578
 579                 if (isset($xrd_arr["xrd"]["alias"])) {
 580                         $webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
 581                 }
 582
 583                 $webfinger["links"] = array();
 584
 585                 foreach ($xrd_arr["xrd"]["link"] as $value => $data) {
 586                         if (isset($data["@attributes"])) {
 587                                 $attributes = $data["@attributes"];
 588                         } elseif ($value == "@attributes") {
 589                                 $attributes = $data;
 590                         } else {
 591                                 continue;
 592                         }
 593
 594                         $webfinger["links"][] = $attributes;
 595                 }
 596                 return $webfinger;
 597         }
 598
 599         /**
 600          * @brief Poll the Friendica specific noscrape page.
 601          *
 602          * "noscrape" is a faster alternative to fetch the data from the hcard.
 603          * This functionality was originally created for the directory.
 604          *
 605          * @param string $noscrape_url Link to the noscrape page
 606          * @param array $data The already fetched data
 607          *
 608          * @return array noscrape data
 609          */
 610         private function pollNoscrape($noscrape_url, $data) {
 611                 $ret = z_fetch_url($noscrape_url);
 612                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 613                         return false;
 614                 }
 615                 $content = $ret['body'];
 616                 if (!$content) {
 617                         logger("Empty body for ".$noscrape_url, LOGGER_DEBUG);
 618                         return false;
 619                 }
 620
 621                 $json = json_decode($content, true);
 622                 if (!is_array($json)) {
 623                         logger("No json data for ".$noscrape_url, LOGGER_DEBUG);
 624                         return false;
 625                 }
 626
 627                 if (isset($json["fn"])) {
 628                         $data["name"] = $json["fn"];
 629                 }
 630
 631                 if (isset($json["addr"])) {
 632                         $data["addr"] = $json["addr"];
 633                 }
 634
 635                 if (isset($json["nick"])) {
 636                         $data["nick"] = $json["nick"];
 637                 }
 638
 639                 if (isset($json["comm"])) {
 640                         $data["community"] = $json["comm"];
 641                 }
 642
 643                 if (isset($json["tags"])) {
 644                         $keywords = implode(" ", $json["tags"]);
 645                         if ($keywords != "") {
 646                                 $data["keywords"] = $keywords;
 647                         }
 648                 }
 649
 650                 $location = formatted_location($json);
 651                 if ($location) {
 652                         $data["location"] = $location;
 653                 }
 654
 655                 if (isset($json["about"])) {
 656                         $data["about"] = $json["about"];
 657                 }
 658
 659                 if (isset($json["key"])) {
 660                         $data["pubkey"] = $json["key"];
 661                 }
 662
 663                 if (isset($json["photo"])) {
 664                         $data["photo"] = $json["photo"];
 665                 }
 666
 667                 if (isset($json["dfrn-request"])) {
 668                         $data["request"] = $json["dfrn-request"];
 669                 }
 670
 671                 if (isset($json["dfrn-confirm"])) {
 672                         $data["confirm"] = $json["dfrn-confirm"];
 673                 }
 674
 675                 if (isset($json["dfrn-notify"])) {
 676                         $data["notify"] = $json["dfrn-notify"];
 677                 }
 678
 679                 if (isset($json["dfrn-poll"])) {
 680                         $data["poll"] = $json["dfrn-poll"];
 681                 }
 682
 683                 return $data;
 684         }
 685
 686         /**
 687          * @brief Check for valid DFRN data
 688          *
 689          * @param array $data DFRN data
 690          *
 691          * @return int Number of errors
 692          */
 693         public static function validDfrn($data) {
 694                 $errors = 0;
 695                 if (!isset($data['key'])) {
 696                         $errors ++;
 697                 }
 698                 if (!isset($data['dfrn-request'])) {
 699                         $errors ++;
 700                 }
 701                 if (!isset($data['dfrn-confirm'])) {
 702                         $errors ++;
 703                 }
 704                 if (!isset($data['dfrn-notify'])) {
 705                         $errors ++;
 706                 }
 707                 if (!isset($data['dfrn-poll'])) {
 708                         $errors ++;
 709                 }
 710                 return $errors;
 711         }
 712
 713         /**
 714          * @brief Fetch data from a DFRN profile page and via "noscrape"
 715          *
 716          * @param string $profile_link Link to the profile page
 717          *
 718          * @return array profile data
 719          */
 720         public static function profile($profile_link) {
 721
 722                 $data = array();
 723
 724                 logger("Check profile ".$profile_link, LOGGER_DEBUG);
 725
 726                 // Fetch data via noscrape - this is faster
 727                 $noscrape_url = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile_link);
 728                 $data = self::pollNoscrape($noscrape_url, $data);
 729
 730                 if (!isset($data["notify"])
 731                         OR !isset($data["confirm"])
 732                         OR !isset($data["request"])
 733                         OR !isset($data["poll"])
 734                         OR !isset($data["poco"])
 735                         OR !isset($data["name"])
 736                         OR !isset($data["photo"])
 737                 ) {
 738                         $data = self::pollHcard($profile_link, $data, true);
 739                 }
 740
 741                 $prof_data = array();
 742                 $prof_data["addr"]         = $data["addr"];
 743                 $prof_data["nick"]         = $data["nick"];
 744                 $prof_data["dfrn-request"] = $data["request"];
 745                 $prof_data["dfrn-confirm"] = $data["confirm"];
 746                 $prof_data["dfrn-notify"]  = $data["notify"];
 747                 $prof_data["dfrn-poll"]    = $data["poll"];
 748                 $prof_data["dfrn-poco"]    = $data["poco"];
 749                 $prof_data["photo"]        = $data["photo"];
 750                 $prof_data["fn"]           = $data["name"];
 751                 $prof_data["key"]          = $data["pubkey"];
 752
 753                 logger("Result for profile ".$profile_link.": ".print_r($prof_data, true), LOGGER_DEBUG);
 754
 755                 return $prof_data;
 756         }
 757
 758         /**
 759          * @brief Check for DFRN contact
 760          *
 761          * @param array $webfinger Webfinger data
 762          *
 763          * @return array DFRN data
 764          */
 765         private function dfrn($webfinger) {
 766
 767                 $hcard_url = "";
 768                 $data = array();
 769                 foreach ($webfinger["links"] as $link) {
 770                         if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != "")) {
 771                                 $data["network"] = NETWORK_DFRN;
 772                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 773                                 $data["poll"] = $link["href"];
 774                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
 775                                 $data["url"] = $link["href"];
 776                         } elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
 777                                 $hcard_url = $link["href"];
 778                         } elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
 779                                 $data["poco"] = $link["href"];
 780                         } elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != "")) {
 781                                 $data["photo"] = $link["href"];
 782                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
 783                                 $data["baseurl"] = trim($link["href"], '/');
 784                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
 785                                 $data["guid"] = $link["href"];
 786                         } elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 787                                 $data["pubkey"] = base64_decode($link["href"]);
 788
 789                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 790                                 if (strstr($data["pubkey"], 'RSA ')) {
 791                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 792                                 }
 793                         }
 794                 }
 795
 796                 if (!isset($data["network"]) OR ($hcard_url == "")) {
 797                         return false;
 798                 }
 799
 800                 // Fetch data via noscrape - this is faster
 801                 $noscrape_url = str_replace("/hcard/", "/noscrape/", $hcard_url);
 802                 $data = self::pollNoscrape($noscrape_url, $data);
 803
 804                 if (isset($data["notify"])
 805                         AND isset($data["confirm"])
 806                         AND isset($data["request"])
 807                         AND isset($data["poll"])
 808                         AND isset($data["name"])
 809                         AND isset($data["photo"])
 810                 ) {
 811                         return $data;
 812                 }
 813
 814                 $data = self::pollHcard($hcard_url, $data, true);
 815
 816                 return $data;
 817         }
 818
 819         /**
 820          * @brief Poll the hcard page (Diaspora and Friendica specific)
 821          *
 822          * @param string $hcard_url Link to the hcard page
 823          * @param array $data The already fetched data
 824          * @param boolean $dfrn Poll DFRN specific data
 825          *
 826          * @return array hcard data
 827          */
 828         private function pollHcard($hcard_url, $data, $dfrn = false) {
 829                 $ret = z_fetch_url($hcard_url);
 830                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
 831                         return false;
 832                 }
 833                 $content = $ret['body'];
 834                 if (!$content) {
 835                         return false;
 836                 }
 837
 838                 $doc = new DOMDocument();
 839                 if (!@$doc->loadHTML($content)) {
 840                         return false;
 841                 }
 842
 843                 $xpath = new DomXPath($doc);
 844
 845                 $vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
 846                 if (!is_object($vcards)) {
 847                         return false;
 848                 }
 849
 850                 if ($vcards->length > 0) {
 851                         $vcard = $vcards->item(0);
 852
 853                         // We have to discard the guid from the hcard in favour of the guid from lrdd
 854                         // Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
 855                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
 856                         if (($search->length > 0) AND ($data["guid"] == "")) {
 857                                 $data["guid"] = $search->item(0)->nodeValue;
 858                         }
 859
 860                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
 861                         if ($search->length > 0) {
 862                                 $data["nick"] = $search->item(0)->nodeValue;
 863                         }
 864
 865                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
 866                         if ($search->length > 0) {
 867                                 $data["name"] = $search->item(0)->nodeValue;
 868                         }
 869
 870                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
 871                         if ($search->length > 0) {
 872                                 $data["searchable"] = $search->item(0)->nodeValue;
 873                         }
 874
 875                         $search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
 876                         if ($search->length > 0) {
 877                                 $data["pubkey"] = $search->item(0)->nodeValue;
 878                                 if (strstr($data["pubkey"], 'RSA ')) {
 879                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 880                                 }
 881                         }
 882
 883                         $search = $xpath->query("//*[@id='pod_location']", $vcard); // */
 884                         if ($search->length > 0) {
 885                                 $data["baseurl"] = trim($search->item(0)->nodeValue, "/");
 886                         }
 887                 }
 888
 889                 $avatar = array();
 890                 $photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
 891                 foreach ($photos as $photo) {
 892                         $attr = array();
 893                         foreach ($photo->attributes as $attribute) {
 894                                 $attr[$attribute->name] = trim($attribute->value);
 895                         }
 896
 897                         if (isset($attr["src"]) AND isset($attr["width"])) {
 898                                 $avatar[$attr["width"]] = $attr["src"];
 899                         }
 900
 901                         // We don't have a width. So we just take everything that we got.
 902                         // This is a Hubzilla workaround which doesn't send a width.
 903                         if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
 904                                 $avatar[] = $attr["src"];
 905                         }
 906                 }
 907
 908                 if (sizeof($avatar)) {
 909                         ksort($avatar);
 910                         $data["photo"] = self::fixAvatar(array_pop($avatar), $data["baseurl"]);
 911                 }
 912
 913                 if ($dfrn) {
 914                         // Poll DFRN specific data
 915                         $search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
 916                         if ($search->length > 0) {
 917                                 foreach ($search as $link) {
 918                                         //$data["request"] = $search->item(0)->nodeValue;
 919                                         $attr = array();
 920                                         foreach ($link->attributes as $attribute) {
 921                                                 $attr[$attribute->name] = trim($attribute->value);
 922                                         }
 923
 924                                         $data[substr($attr["rel"], 5)] = $attr["href"];
 925                                 }
 926                         }
 927
 928                         // Older Friendica versions had used the "uid" field differently than newer versions
 929                         if ($data["nick"] == $data["guid"]) {
 930                                 unset($data["guid"]);
 931                         }
 932                 }
 933
 934
 935                 return $data;
 936         }
 937
 938         /**
 939          * @brief Check for Diaspora contact
 940          *
 941          * @param array $webfinger Webfinger data
 942          *
 943          * @return array Diaspora data
 944          */
 945         private function diaspora($webfinger) {
 946
 947                 $hcard_url = "";
 948                 $data = array();
 949                 foreach ($webfinger["links"] as $link) {
 950                         if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != "")) {
 951                                 $hcard_url = $link["href"];
 952                         } elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != "")) {
 953                                 $data["baseurl"] = trim($link["href"], '/');
 954                         } elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != "")) {
 955                                 $data["guid"] = $link["href"];
 956                         } elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND ($link["type"] == "text/html") AND ($link["href"] != "")) {
 957                                 $data["url"] = $link["href"];
 958                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
 959                                 $data["poll"] = $link["href"];
 960                         } elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != "")) {
 961                                 $data["poco"] = $link["href"];
 962                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
 963                                 $data["notify"] = $link["href"];
 964                         } elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
 965                                 $data["pubkey"] = base64_decode($link["href"]);
 966
 967                                 //if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
 968                                 if (strstr($data["pubkey"], 'RSA ')) {
 969                                         $data["pubkey"] = rsatopem($data["pubkey"]);
 970                                 }
 971                         }
 972                 }
 973
 974                 if (!isset($data["url"]) OR ($hcard_url == "")) {
 975                         return false;
 976                 }
 977
 978                 if (is_array($webfinger["aliases"])) {
 979                         foreach ($webfinger["aliases"] as $alias) {
 980                                 if (normalise_link($alias) != normalise_link($data["url"]) AND ! strstr($alias, "@")) {
 981                                         $data["alias"] = $alias;
 982                                 }
 983                         }
 984                 }
 985
 986                 // Fetch further information from the hcard
 987                 $data = self::pollHcard($hcard_url, $data);
 988
 989                 if (!$data) {
 990                         return false;
 991                 }
 992
 993                 if (isset($data["url"])
 994                         AND isset($data["guid"])
 995                         AND isset($data["baseurl"])
 996                         AND isset($data["pubkey"])
 997                         AND ($hcard_url != "")
 998                 ) {
 999                         $data["network"] = NETWORK_DIASPORA;
1000
1001                         // The Diaspora handle must always be lowercase
1002                         $data["addr"] = strtolower($data["addr"]);
1003
1004                         // We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
1005                         $data["notify"] = $data["baseurl"] . "/receive/users/" . $data["guid"];
1006                         $data["batch"]  = $data["baseurl"] . "/receive/public";
1007                 } else {
1008                         return false;
1009                 }
1010
1011                 return $data;
1012         }
1013
1014         /**
1015          * @brief Check for OStatus contact
1016          *
1017          * @param array $webfinger Webfinger data
1018          *
1019          * @return array OStatus data
1020          */
1021         private function ostatus($webfinger) {
1022                 $data = array();
1023                 if (is_array($webfinger["aliases"])) {
1024                         foreach ($webfinger["aliases"] as $alias) {
1025                                 if (strstr($alias, "@")) {
1026                                         $data["addr"] = str_replace('acct:', '', $alias);
1027                                 }
1028                         }
1029                 }
1030
1031                 if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
1032                         $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
1033                 }
1034                 $pubkey = "";
1035                 foreach ($webfinger["links"] as $link) {
1036                         if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1037                                 AND ($link["type"] == "text/html")
1038                                 AND ($link["href"] != "")
1039                         ) {
1040                                 $data["url"] = $link["href"];
1041                         } elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
1042                                 $data["notify"] = $link["href"];
1043                         } elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
1044                                 $data["poll"] = $link["href"];
1045                         } elseif (($link["rel"] == "magic-public-key") AND ($link["href"] != "")) {
1046                                 $pubkey = $link["href"];
1047
1048                                 if (substr($pubkey, 0, 5) === 'data:') {
1049                                         if (strstr($pubkey, ',')) {
1050                                                 $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
1051                                         } else {
1052                                                 $pubkey = substr($pubkey, 5);
1053                                         }
1054                                 } elseif (normalise_link($pubkey) == 'http://') {
1055                                         $ret = z_fetch_url($pubkey);
1056                                         if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1057                                                 return false;
1058                                         }
1059                                         $pubkey = $ret['body'];
1060                                 }
1061
1062                                 $key = explode(".", $pubkey);
1063
1064                                 if (sizeof($key) >= 3) {
1065                                         $m = base64url_decode($key[1]);
1066                                         $e = base64url_decode($key[2]);
1067                                         $data["pubkey"] = metopem($m, $e);
1068                                 }
1069                         }
1070                 }
1071
1072                 if (isset($data["notify"]) AND isset($data["pubkey"])
1073                         AND isset($data["poll"])
1074                         AND isset($data["url"])
1075                 ) {
1076                         $data["network"] = NETWORK_OSTATUS;
1077                 } else {
1078                         return false;
1079                 }
1080                 // Fetch all additional data from the feed
1081                 $ret = z_fetch_url($data["poll"]);
1082                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1083                         return false;
1084                 }
1085                 $feed = $ret['body'];
1086                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1087                 if (!$feed_data) {
1088                         return false;
1089                 }
1090                 if ($feed_data["header"]["author-name"] != "") {
1091                         $data["name"] = $feed_data["header"]["author-name"];
1092                 }
1093                 if ($feed_data["header"]["author-nick"] != "") {
1094                         $data["nick"] = $feed_data["header"]["author-nick"];
1095                 }
1096                 if ($feed_data["header"]["author-avatar"] != "") {
1097                         $data["photo"] = self::fixAvatar($feed_data["header"]["author-avatar"], $data["url"]);
1098                 }
1099                 if ($feed_data["header"]["author-id"] != "") {
1100                         $data["alias"] = $feed_data["header"]["author-id"];
1101                 }
1102                 if ($feed_data["header"]["author-location"] != "") {
1103                         $data["location"] = $feed_data["header"]["author-location"];
1104                 }
1105                 if ($feed_data["header"]["author-about"] != "") {
1106                         $data["about"] = $feed_data["header"]["author-about"];
1107                 }
1108                 // OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
1109                 // So we take the value that we just fetched, although the other one worked as well
1110                 if ($feed_data["header"]["author-link"] != "") {
1111                         $data["url"] = $feed_data["header"]["author-link"];
1112                 }
1113                 /// @todo Fetch location and "about" from the feed as well
1114                 return $data;
1115         }
1116
1117         /**
1118          * @brief Fetch data from a pump.io profile page
1119          *
1120          * @param string $profile_link Link to the profile page
1121          *
1122          * @return array profile data
1123          */
1124         private function pumpioProfileData($profile_link) {
1125
1126                 $doc = new DOMDocument();
1127                 if (!@$doc->loadHTMLFile($profile_link)) {
1128                         return false;
1129                 }
1130
1131                 $xpath = new DomXPath($doc);
1132
1133                 $data = array();
1134
1135                 // This is ugly - but pump.io doesn't seem to know a better way for it
1136                 $data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
1137                 $pos = strpos($data["name"], chr(10));
1138                 if ($pos) {
1139                         $data["name"] = trim(substr($data["name"], 0, $pos));
1140                 }
1141
1142                 $avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
1143                 if ($avatar) {
1144                         foreach ($avatar->attributes as $attribute) {
1145                                 if ($attribute->name == "src") {
1146                                         $data["photo"] = trim($attribute->value);
1147                                 }
1148                         }
1149                 }
1150
1151                 $data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
1152                 $data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
1153
1154                 return $data;
1155         }
1156
1157         /**
1158          * @brief Check for pump.io contact
1159          *
1160          * @param array $webfinger Webfinger data
1161          *
1162          * @return array pump.io data
1163          */
1164         private function pumpio($webfinger) {
1165
1166                 $data = array();
1167                 foreach ($webfinger["links"] as $link) {
1168                         if (($link["rel"] == "http://webfinger.net/rel/profile-page")
1169                                 AND ($link["type"] == "text/html")
1170                                 AND ($link["href"] != "")
1171                         ) {
1172                                 $data["url"] = $link["href"];
1173                         } elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != "")) {
1174                                 $data["notify"] = $link["href"];
1175                         } elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != "")) {
1176                                 $data["poll"] = $link["href"];
1177                         } elseif (($link["rel"] == "dialback") AND ($link["href"] != "")) {
1178                                 $data["dialback"] = $link["href"];
1179                         }
1180                 }
1181                 if (isset($data["poll"]) AND isset($data["notify"])
1182                         AND isset($data["dialback"])
1183                         AND isset($data["url"])
1184                 ) {
1185                         // by now we use these fields only for the network type detection
1186                         // So we unset all data that isn't used at the moment
1187                         unset($data["dialback"]);
1188
1189                         $data["network"] = NETWORK_PUMPIO;
1190                 } else {
1191                         return false;
1192                 }
1193
1194                 $profile_data = self::pumpioProfileData($data["url"]);
1195
1196                 if (!$profile_data) {
1197                         return false;
1198                 }
1199
1200                 $data = array_merge($data, $profile_data);
1201
1202                 return $data;
1203         }
1204
1205         /**
1206          * @brief Check page for feed link
1207          *
1208          * @param string $url Page link
1209          *
1210          * @return string feed link
1211          */
1212         private function getFeedLink($url) {
1213                 $doc = new DOMDocument();
1214
1215                 if (!@$doc->loadHTMLFile($url)) {
1216                         return false;
1217                 }
1218
1219                 $xpath = new DomXPath($doc);
1220
1221                 //$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
1222                 $feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
1223                 if (!is_object($feeds)) {
1224                         return false;
1225                 }
1226
1227                 if ($feeds->length == 0) {
1228                         return false;
1229                 }
1230
1231                 $feed_url = "";
1232
1233                 foreach ($feeds as $feed) {
1234                         $attr = array();
1235                         foreach ($feed->attributes as $attribute) {
1236                                 $attr[$attribute->name] = trim($attribute->value);
1237                         }
1238
1239                         if ($feed_url == "") {
1240                                 $feed_url = $attr["href"];
1241                         }
1242                 }
1243
1244                 return $feed_url;
1245         }
1246
1247         /**
1248          * @brief Check for feed contact
1249          *
1250          * @param string $url Profile link
1251          * @param boolean $probe Do a probe if the page contains a feed link
1252          *
1253          * @return array feed data
1254          */
1255         private function feed($url, $probe = true) {
1256                 $ret = z_fetch_url($url);
1257                 if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
1258                         return false;
1259                 }
1260                 $feed = $ret['body'];
1261                 $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
1262
1263                 if (!$feed_data) {
1264                         if (!$probe) {
1265                                 return false;
1266                         }
1267
1268                         $feed_url = self::getFeedLink($url);
1269
1270                         if (!$feed_url) {
1271                                 return false;
1272                         }
1273
1274                         return self::feed($feed_url, false);
1275                 }
1276
1277                 if ($feed_data["header"]["author-name"] != "") {
1278                         $data["name"] = $feed_data["header"]["author-name"];
1279                 }
1280
1281                 if ($feed_data["header"]["author-nick"] != "") {
1282                         $data["nick"] = $feed_data["header"]["author-nick"];
1283                 }
1284
1285                 if ($feed_data["header"]["author-avatar"] != "") {
1286                         $data["photo"] = $feed_data["header"]["author-avatar"];
1287                 }
1288
1289                 if ($feed_data["header"]["author-id"] != "") {
1290                         $data["alias"] = $feed_data["header"]["author-id"];
1291                 }
1292
1293                 $data["url"] = $url;
1294                 $data["poll"] = $url;
1295
1296                 if ($feed_data["header"]["author-link"] != "") {
1297                         $data["baseurl"] = $feed_data["header"]["author-link"];
1298                 } else {
1299                         $data["baseurl"] = $data["url"];
1300                 }
1301
1302                 $data["network"] = NETWORK_FEED;
1303
1304                 return $data;
1305         }
1306
1307         /**
1308          * @brief Check for mail contact
1309          *
1310          * @param string $uri Profile link
1311          * @param integer $uid User ID
1312          *
1313          * @return array mail data
1314          */
1315         private function mail($uri, $uid) {
1316
1317                 if (!validate_email($uri)) {
1318                         return false;
1319                 }
1320
1321                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
1322
1323                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
1324
1325                 if (dbm::is_result($x) && dbm::is_result($r)) {
1326                         $mailbox = construct_mailbox_name($r[0]);
1327                         $password = '';
1328                         openssl_private_decrypt(hex2bin($r[0]['pass']), $password, $x[0]['prvkey']);
1329                         $mbox = email_connect($mailbox, $r[0]['user'], $password);
1330                         if (!mbox) {
1331                                 return false;
1332                         }
1333                 }
1334
1335                 $msgs = email_poll($mbox, $uri);
1336                 logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
1337
1338                 if (!count($msgs)) {
1339                         return false;
1340                 }
1341
1342                 $phost = substr($uri, strpos($uri, '@') + 1);
1343
1344                 $data = array();
1345                 $data["addr"]    = $uri;
1346                 $data["network"] = NETWORK_MAIL;
1347                 $data["name"]    = substr($uri, 0, strpos($uri, '@'));
1348                 $data["nick"]    = $data["name"];
1349                 $data["photo"]   = avatar_img($uri);
1350                 $data["url"]     = 'http://'.$phost."/".$data["nick"];
1351                 $data["notify"]  = 'smtp '.random_string();
1352                 $data["poll"]    = 'email '.random_string();
1353
1354                 $x = email_msg_meta($mbox, $msgs[0]);
1355                 if (stristr($x[0]->from, $uri)) {
1356                         $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
1357                 } elseif (stristr($x[0]->to, $uri)) {
1358                         $adr = imap_rfc822_parse_adrlist($x[0]->to, '');
1359                 }
1360                 if (isset($adr)) {
1361                         foreach ($adr as $feadr) {
1362                                 if ((strcasecmp($feadr->mailbox, $data["name"]) == 0)
1363                                         &&(strcasecmp($feadr->host, $phost) == 0)
1364                                         && (strlen($feadr->personal))
1365                                 ) {
1366                                         $personal = imap_mime_header_decode($feadr->personal);
1367                                         $data["name"] = "";
1368                                         foreach ($personal as $perspart) {
1369                                                 if ($perspart->charset != "default") {
1370                                                         $data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
1371                                                 } else {
1372                                                         $data["name"] .= $perspart->text;
1373                                                 }
1374                                         }
1375
1376                                         $data["name"] = notags($data["name"]);
1377                                 }
1378                         }
1379                 }
1380                 imap_close($mbox);
1381
1382                 return $data;
1383         }
1384
1385         /**
1386          * @brief Mix two paths together to possibly fix missing parts
1387          *
1388          * @param string $avatar Path to the avatar
1389          * @param string $base Another path that is hopefully complete
1390          *
1391          * @return string fixed avatar path
1392          */
1393         public static function fixAvatar($avatar, $base) {
1394                 $base_parts = parse_url($base);
1395
1396                 // Remove all parts that could create a problem
1397                 unset($base_parts['path']);
1398                 unset($base_parts['query']);
1399                 unset($base_parts['fragment']);
1400
1401                 $avatar_parts = parse_url($avatar);
1402
1403                 // Now we mix them
1404                 $parts = array_merge($base_parts, $avatar_parts);
1405
1406                 // And put them together again
1407                 $scheme   = isset($parts['scheme'])   ? $parts['scheme'] . '://' : '';
1408                 $host     = isset($parts['host'])     ? $parts['host']           : '';
1409                 $port     = isset($parts['port'])     ? ':' . $parts['port']     : '';
1410                 $path     = isset($parts['path'])     ? $parts['path']           : '';
1411                 $query    = isset($parts['query'])    ? '?' . $parts['query']    : '';
1412                 $fragment = isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
1413
1414                 $fixed = $scheme.$host.$port.$path.$query.$fragment;
1415
1416                 logger('Base: '.$base.' - Avatar: '.$avatar.' - Fixed: '.$fixed, LOGGER_DATA);
1417
1418                 return $fixed;
1419         }
1420 }