include/Scrape.php

   1 <?php
   2
   3 require_once('library/HTML5/Parser.php');
   4 require_once('include/crypto.php');
   5 require_once('include/feed.php');
   6
   7 if(! function_exists('scrape_dfrn')) {
   8 function scrape_dfrn($url, $dont_probe = false) {
   9
  10         $a = get_app();
  11
  12         $ret = array();
  13
  14         logger('scrape_dfrn: url=' . $url);
  15
  16         $s = fetch_url($url);
  17
  18         if(! $s)
  19                 return $ret;
  20
  21         if (!$dont_probe) {
  22                 $probe = probe_url($url);
  23
  24                 if (isset($probe["addr"]))
  25                         $ret["addr"] = $probe["addr"];
  26         }
  27
  28         $headers = $a->get_curl_headers();
  29         logger('scrape_dfrn: headers=' . $headers, LOGGER_DEBUG);
  30
  31
  32         $lines = explode("\n",$headers);
  33         if(count($lines)) {
  34                 foreach($lines as $line) {
  35                         // don't try and run feeds through the html5 parser
  36                         if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
  37                                 return ret;
  38                 }
  39         }
  40
  41         try {
  42                 $dom = HTML5_Parser::parse($s);
  43         } catch (DOMException $e) {
  44                 logger('scrape_dfrn: parse error: ' . $e);
  45         }
  46
  47         if(! $dom)
  48                 return $ret;
  49
  50         $items = $dom->getElementsByTagName('link');
  51
  52         // get DFRN link elements
  53
  54         foreach($items as $item) {
  55                 $x = $item->getAttribute('rel');
  56                 if(($x === 'alternate') && ($item->getAttribute('type') === 'application/atom+xml'))
  57                         $ret['feed_atom'] = $item->getAttribute('href');
  58                 if(substr($x,0,5) == "dfrn-") {
  59                         $ret[$x] = $item->getAttribute('href');
  60                 }
  61                 if($x === 'lrdd') {
  62                         $decoded = urldecode($item->getAttribute('href'));
  63                         if(preg_match('/acct:([^@]*)@/',$decoded,$matches))
  64                                 $ret['nick'] = $matches[1];
  65                 }
  66         }
  67
  68         // Pull out hCard profile elements
  69
  70         $largest_photo = 0;
  71
  72         $items = $dom->getElementsByTagName('*');
  73         foreach($items as $item) {
  74                 if(attribute_contains($item->getAttribute('class'), 'vcard')) {
  75                         $level2 = $item->getElementsByTagName('*');
  76                         foreach($level2 as $x) {
  77                                 if(attribute_contains($x->getAttribute('class'),'fn')) {
  78                                         $ret['fn'] = $x->textContent;
  79                                 }
  80                                 if((attribute_contains($x->getAttribute('class'),'photo'))
  81                                         || (attribute_contains($x->getAttribute('class'),'avatar'))) {
  82                                         $size = intval($x->getAttribute('width'));
  83                                         // dfrn prefers 175, so if we find this, we set largest_size so it can't be topped.
  84                                         if(($size > $largest_photo) || ($size == 175) || (! $largest_photo)) {
  85                                                 $ret['photo'] = $x->getAttribute('src');
  86                                                 $largest_photo = (($size == 175) ? 9999 : $size);
  87                                         }
  88                                 }
  89                                 if(attribute_contains($x->getAttribute('class'),'key')) {
  90                                         $ret['key'] = $x->textContent;
  91                                 }
  92                         }
  93                 }
  94         }
  95
  96         return $ret;
  97 }}
  98
  99
 100
 101
 102
 103
 104 if(! function_exists('validate_dfrn')) {
 105 function validate_dfrn($a) {
 106         $errors = 0;
 107         if(! x($a,'key'))
 108                 $errors ++;
 109         if(! x($a,'dfrn-request'))
 110                 $errors ++;
 111         if(! x($a,'dfrn-confirm'))
 112                 $errors ++;
 113         if(! x($a,'dfrn-notify'))
 114                 $errors ++;
 115         if(! x($a,'dfrn-poll'))
 116                 $errors ++;
 117         return $errors;
 118 }}
 119
 120 if(! function_exists('scrape_meta')) {
 121 function scrape_meta($url) {
 122
 123         $a = get_app();
 124
 125         $ret = array();
 126
 127         logger('scrape_meta: url=' . $url);
 128
 129         $s = fetch_url($url);
 130
 131         if(! $s)
 132                 return $ret;
 133
 134         $headers = $a->get_curl_headers();
 135         logger('scrape_meta: headers=' . $headers, LOGGER_DEBUG);
 136
 137         $lines = explode("\n",$headers);
 138         if(count($lines)) {
 139                 foreach($lines as $line) {
 140                         // don't try and run feeds through the html5 parser
 141                         if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
 142                                 return ret;
 143                 }
 144         }
 145
 146         try {
 147                 $dom = HTML5_Parser::parse($s);
 148         } catch (DOMException $e) {
 149                 logger('scrape_meta: parse error: ' . $e);
 150         }
 151
 152         if(! $dom)
 153                 return $ret;
 154
 155         $items = $dom->getElementsByTagName('meta');
 156
 157         // get DFRN link elements
 158
 159         foreach($items as $item) {
 160                 $x = $item->getAttribute('name');
 161                 if(substr($x,0,5) == "dfrn-")
 162                         $ret[$x] = $item->getAttribute('content');
 163         }
 164
 165         return $ret;
 166 }}
 167
 168
 169 if(! function_exists('scrape_vcard')) {
 170 function scrape_vcard($url) {
 171
 172         $a = get_app();
 173
 174         $ret = array();
 175
 176         logger('scrape_vcard: url=' . $url);
 177
 178         $s = fetch_url($url);
 179
 180         if(! $s)
 181                 return $ret;
 182
 183         $headers = $a->get_curl_headers();
 184         $lines = explode("\n",$headers);
 185         if(count($lines)) {
 186                 foreach($lines as $line) {
 187                         // don't try and run feeds through the html5 parser
 188                         if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
 189                                 return ret;
 190                 }
 191         }
 192
 193         try {
 194                 $dom = HTML5_Parser::parse($s);
 195         } catch (DOMException $e) {
 196                 logger('scrape_vcard: parse error: ' . $e);
 197         }
 198
 199         if(! $dom)
 200                 return $ret;
 201
 202         // Pull out hCard profile elements
 203
 204         $largest_photo = 0;
 205
 206         $items = $dom->getElementsByTagName('*');
 207         foreach($items as $item) {
 208                 if(attribute_contains($item->getAttribute('class'), 'vcard')) {
 209                         $level2 = $item->getElementsByTagName('*');
 210                         foreach($level2 as $x) {
 211                                 if(attribute_contains($x->getAttribute('class'),'fn'))
 212                                         $ret['fn'] = $x->textContent;
 213                                 if((attribute_contains($x->getAttribute('class'),'photo'))
 214                                         || (attribute_contains($x->getAttribute('class'),'avatar'))) {
 215                                         $size = intval($x->getAttribute('width'));
 216                                         if(($size > $largest_photo) || (! $largest_photo)) {
 217                                                 $ret['photo'] = $x->getAttribute('src');
 218                                                 $largest_photo = $size;
 219                                         }
 220                                 }
 221                                 if((attribute_contains($x->getAttribute('class'),'nickname'))
 222                                         || (attribute_contains($x->getAttribute('class'),'uid'))) {
 223                                         $ret['nick'] = $x->textContent;
 224                                 }
 225                         }
 226                 }
 227         }
 228
 229         return $ret;
 230 }}
 231
 232
 233 if(! function_exists('scrape_feed')) {
 234 function scrape_feed($url) {
 235
 236         $a = get_app();
 237
 238         $ret = array();
 239         $cookiejar = tempnam(get_temppath(), 'cookiejar-scrape-feed-');
 240         $s = fetch_url($url, false, $redirects, 0, Null, $cookiejar);
 241         unlink($cookiejar);
 242
 243         $headers = $a->get_curl_headers();
 244         $code = $a->get_curl_code();
 245
 246         logger('scrape_feed: returns: ' . $code . ' headers=' . $headers, LOGGER_DEBUG);
 247
 248         if(! $s) {
 249                 logger('scrape_feed: no data returned for ' . $url);
 250                 return $ret;
 251         }
 252
 253
 254         $lines = explode("\n",$headers);
 255         if(count($lines)) {
 256                 foreach($lines as $line) {
 257                         if(stristr($line,'content-type:')) {
 258                                 if(stristr($line,'application/atom+xml') || stristr($s,'<feed')) {
 259                                         $ret['feed_atom'] = $url;
 260                                         return $ret;
 261                                 }
 262                                 if(stristr($line,'application/rss+xml') || stristr($s,'<rss')) {
 263                                         $ret['feed_rss'] = $url;
 264                                         return $ret;
 265                                 }
 266                         }
 267                 }
 268                 // perhaps an RSS version 1 feed with a generic or incorrect content-type?
 269                 if(stristr($s,'</item>')) {
 270                         $ret['feed_rss'] = $url;
 271                         return $ret;
 272                 }
 273         }
 274
 275         $basename = implode('/', array_slice(explode('/',$url),0,3)) . '/';
 276
 277         $doc = new DOMDocument();
 278         @$doc->loadHTML($s);
 279         $xpath = new DomXPath($doc);
 280
 281         $base = $xpath->query("//base");
 282         foreach ($base as $node) {
 283                 $attr = array();
 284
 285                 if ($node->attributes->length)
 286                         foreach ($node->attributes as $attribute)
 287                                 $attr[$attribute->name] = $attribute->value;
 288
 289                 if ($attr["href"] != "")
 290                         $basename = $attr["href"] ;
 291         }
 292
 293         $list = $xpath->query("//link");
 294         foreach ($list as $node) {
 295                 $attr = array();
 296
 297                 if ($node->attributes->length)
 298                         foreach ($node->attributes as $attribute)
 299                                 $attr[$attribute->name] = $attribute->value;
 300
 301                 if (($attr["rel"] == "alternate") AND ($attr["type"] == "application/atom+xml"))
 302                         $ret["feed_atom"] = $attr["href"];
 303
 304                 if (($attr["rel"] == "alternate") AND ($attr["type"] == "application/rss+xml"))
 305                         $ret["feed_rss"] = $attr["href"];
 306         }
 307
 308         // Drupal and perhaps others only provide relative URLs. Turn them into absolute.
 309
 310         if(x($ret,'feed_atom') && (! strstr($ret['feed_atom'],'://')))
 311                 $ret['feed_atom'] = $basename . $ret['feed_atom'];
 312         if(x($ret,'feed_rss') && (! strstr($ret['feed_rss'],'://')))
 313                 $ret['feed_rss'] = $basename . $ret['feed_rss'];
 314
 315         return $ret;
 316 }}
 317
 318
 319 /**
 320  *
 321  * Probe a network address to discover what kind of protocols we need to communicate with it.
 322  *
 323  * Warning: this function is a bit touchy and there are some subtle dependencies within the logic flow.
 324  * Edit with care.
 325  *
 326  */
 327
 328 /**
 329  *
 330  * PROBE_DIASPORA has a bias towards returning Diaspora information
 331  * while PROBE_NORMAL has a bias towards dfrn/zot - in the case where
 332  * an address (such as a Friendica address) supports more than one type
 333  * of network.
 334  *
 335  */
 336
 337
 338 define ( 'PROBE_NORMAL',   0);
 339 define ( 'PROBE_DIASPORA', 1);
 340
 341 function probe_url($url, $mode = PROBE_NORMAL, $level = 1) {
 342         require_once('include/email.php');
 343
 344         $result = array();
 345
 346         if(! $url)
 347                 return $result;
 348
 349         $result = Cache::get("probe_url:".$mode.":".$url);
 350         if (!is_null($result)) {
 351                 $result = unserialize($result);
 352                 return $result;
 353         }
 354
 355         $network = null;
 356         $diaspora = false;
 357         $diaspora_base = '';
 358         $diaspora_guid = '';
 359         $diaspora_key = '';
 360         $has_lrdd = false;
 361         $email_conversant = false;
 362         $connectornetworks = false;
 363         $appnet = false;
 364
 365         if (strpos($url,'twitter.com')) {
 366                 $connectornetworks = true;
 367                 $network = NETWORK_TWITTER;
 368         }
 369
 370         $lastfm  = ((strpos($url,'last.fm/user') !== false) ? true : false);
 371
 372         $at_addr = ((strpos($url,'@') !== false) ? true : false);
 373
 374         if((!$appnet) && (!$lastfm) && !$connectornetworks) {
 375
 376                 if(strpos($url,'mailto:') !== false && $at_addr) {
 377                         $url = str_replace('mailto:','',$url);
 378                         $links = array();
 379                 }
 380                 else
 381                         $links = lrdd($url);
 382
 383                 if(count($links)) {
 384                         $has_lrdd = true;
 385
 386                         logger('probe_url: found lrdd links: ' . print_r($links,true), LOGGER_DATA);
 387                         foreach($links as $link) {
 388                                 if($link['@attributes']['rel'] === NAMESPACE_ZOT)
 389                                         $zot = unamp($link['@attributes']['href']);
 390                                 if($link['@attributes']['rel'] === NAMESPACE_DFRN)
 391                                         $dfrn = unamp($link['@attributes']['href']);
 392                                 if($link['@attributes']['rel'] === 'salmon')
 393                                         $notify = unamp($link['@attributes']['href']);
 394                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 395                                         $poll = unamp($link['@attributes']['href']);
 396                                 if($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
 397                                         $hcard = unamp($link['@attributes']['href']);
 398                                 if($link['@attributes']['rel'] === 'http://webfinger.net/rel/profile-page')
 399                                         $profile = unamp($link['@attributes']['href']);
 400                                 if($link['@attributes']['rel'] === 'http://portablecontacts.net/spec/1.0')
 401                                         $poco = unamp($link['@attributes']['href']);
 402                                 if($link['@attributes']['rel'] === 'http://joindiaspora.com/seed_location') {
 403                                         $diaspora_base = unamp($link['@attributes']['href']);
 404                                         $diaspora = true;
 405                                 }
 406                                 if($link['@attributes']['rel'] === 'http://joindiaspora.com/guid') {
 407                                         $diaspora_guid = unamp($link['@attributes']['href']);
 408                                         $diaspora = true;
 409                                 }
 410                                 if($link['@attributes']['rel'] === 'diaspora-public-key') {
 411                                         $diaspora_key = base64_decode(unamp($link['@attributes']['href']));
 412                                         if(strstr($diaspora_key,'RSA '))
 413                                                 $pubkey = rsatopem($diaspora_key);
 414                                         else
 415                                                 $pubkey = $diaspora_key;
 416                                         $diaspora = true;
 417                                 }
 418                                 if(($link['@attributes']['rel'] === 'http://ostatus.org/schema/1.0/subscribe') AND ($mode == PROBE_NORMAL)) {
 419                                         $diaspora = false;
 420                                 }
 421                         }
 422
 423                         // Status.Net can have more than one profile URL. We need to match the profile URL
 424                         // to a contact on incoming messages to prevent spam, and we won't know which one
 425                         // to match. So in case of two, one of them is stored as an alias. Only store URL's
 426                         // and not webfinger user@host aliases. If they've got more than two non-email style
 427                         // aliases, let's hope we're lucky and get one that matches the feed author-uri because
 428                         // otherwise we're screwed.
 429
 430                         foreach($links as $link) {
 431                                 if($link['@attributes']['rel'] === 'alias') {
 432                                         if(strpos($link['@attributes']['href'],'@') === false) {
 433                                                 if(isset($profile)) {
 434                                                         if($link['@attributes']['href'] !== $profile)
 435                                                                 $alias = unamp($link['@attributes']['href']);
 436                                                 }
 437                                                 else
 438                                                         $profile = unamp($link['@attributes']['href']);
 439                                         }
 440                                 }
 441                         }
 442
 443                         // If the profile is different from the url then the url is abviously an alias
 444                         if (($alias == "") AND ($profile != "") AND !$at_addr AND (normalise_link($profile) != normalise_link($url)))
 445                                 $alias = $url;
 446                 }
 447                 elseif($mode == PROBE_NORMAL) {
 448
 449                         // Check email
 450
 451                         $orig_url = $url;
 452                         if((strpos($orig_url,'@')) && validate_email($orig_url)) {
 453                                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1",
 454                                         intval(local_user())
 455                                 );
 456                                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1",
 457                                         intval(local_user())
 458                                 );
 459                                 if(count($x) && count($r)) {
 460                                         $mailbox = construct_mailbox_name($r[0]);
 461                                         $password = '';
 462                                         openssl_private_decrypt(hex2bin($r[0]['pass']),$password,$x[0]['prvkey']);
 463                                         $mbox = email_connect($mailbox,$r[0]['user'],$password);
 464                                         if(! $mbox)
 465                                                 logger('probe_url: email_connect failed.');
 466                                         unset($password);
 467                                 }
 468                                 if($mbox) {
 469                                         $msgs = email_poll($mbox,$orig_url);
 470                                         logger('probe_url: searching ' . $orig_url . ', ' . count($msgs) . ' messages found.', LOGGER_DEBUG);
 471                                         if(count($msgs)) {
 472                                                 $addr = $orig_url;
 473                                                 $network = NETWORK_MAIL;
 474                                                 $name = substr($url,0,strpos($url,'@'));
 475                                                 $phost = substr($url,strpos($url,'@')+1);
 476                                                 $profile = 'http://' . $phost;
 477                                                 // fix nick character range
 478                                                 $vcard = array('fn' => $name, 'nick' => $name, 'photo' => avatar_img($url));
 479                                                 $notify = 'smtp ' . random_string();
 480                                                 $poll = 'email ' . random_string();
 481                                                 $priority = 0;
 482                                                 $x = email_msg_meta($mbox,$msgs[0]);
 483                                                 if(stristr($x[0]->from,$orig_url))
 484                                                         $adr = imap_rfc822_parse_adrlist($x[0]->from,'');
 485                                                 elseif(stristr($x[0]->to,$orig_url))
 486                                                         $adr = imap_rfc822_parse_adrlist($x[0]->to,'');
 487                                                 if(isset($adr)) {
 488                                                         foreach($adr as $feadr) {
 489                                                                 if((strcasecmp($feadr->mailbox,$name) == 0)
 490                                                                         &&(strcasecmp($feadr->host,$phost) == 0)
 491                                                                         && (strlen($feadr->personal))) {
 492
 493                                                                         $personal = imap_mime_header_decode($feadr->personal);
 494                                                                         $vcard['fn'] = "";
 495                                                                         foreach($personal as $perspart)
 496                                                                                 if ($perspart->charset != "default")
 497                                                                                         $vcard['fn'] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
 498                                                                                 else
 499                                                                                         $vcard['fn'] .= $perspart->text;
 500
 501                                                                         $vcard['fn'] = notags($vcard['fn']);
 502                                                                 }
 503                                                         }
 504                                                 }
 505                                         }
 506                                         imap_close($mbox);
 507                                 }
 508                         }
 509                 }
 510         }
 511
 512         if($mode == PROBE_NORMAL) {
 513
 514                 if(strlen($zot)) {
 515                         $s = fetch_url($zot);
 516                         if($s) {
 517                                 $j = json_decode($s);
 518                                 if($j) {
 519                                         $network = NETWORK_ZOT;
 520                                         $vcard   = array(
 521                                                 'fn'    => $j->fullname,
 522                                                 'nick'  => $j->nickname,
 523                                                 'photo' => $j->photo
 524                                         );
 525                                         $profile  = $j->url;
 526                                         $notify   = $j->post;
 527                                         $pubkey   = $j->pubkey;
 528                                         $poll     = 'N/A';
 529                                 }
 530                         }
 531                 }
 532
 533
 534                 if(strlen($dfrn)) {
 535                         $ret = scrape_dfrn(($hcard) ? $hcard : $dfrn, true);
 536                         if(is_array($ret) && x($ret,'dfrn-request')) {
 537                                 $network = NETWORK_DFRN;
 538                                 $request = $ret['dfrn-request'];
 539                                 $confirm = $ret['dfrn-confirm'];
 540                                 $notify  = $ret['dfrn-notify'];
 541                                 $poll    = $ret['dfrn-poll'];
 542
 543                                 $vcard = array();
 544                                 $vcard['fn'] = $ret['fn'];
 545                                 $vcard['nick'] = $ret['nick'];
 546                                 $vcard['photo'] = $ret['photo'];
 547                         }
 548                 }
 549         }
 550
 551         // Scrape the public key from the hcard.
 552         // Diaspora will remove it from the webfinger somewhere in the future.
 553         if (($hcard != "") AND ($pubkey == "")) {
 554                 $ret = scrape_dfrn(($hcard) ? $hcard : $dfrn, true);
 555                 if (isset($ret["key"])) {
 556                         $hcard_key = $ret["key"];
 557                         if(strstr($hcard_key,'RSA '))
 558                                 $pubkey = rsatopem($hcard_key);
 559                         else
 560                                 $pubkey = $hcard_key;
 561                 }
 562         }
 563         if($diaspora && $diaspora_base && $diaspora_guid) {
 564                 $diaspora_notify = $diaspora_base.'receive/users/'.$diaspora_guid;
 565
 566                 if($mode == PROBE_DIASPORA || ! $notify || ($notify == $diaspora_notify)) {
 567                         $notify = $diaspora_notify;
 568                         $batch  = $diaspora_base . 'receive/public' ;
 569                 }
 570                 if(strpos($url,'@'))
 571                         $addr = str_replace('acct:', '', $url);
 572         }
 573
 574         if($network !== NETWORK_ZOT && $network !== NETWORK_DFRN && $network !== NETWORK_MAIL) {
 575                 if($diaspora)
 576                         $network = NETWORK_DIASPORA;
 577                 elseif($has_lrdd AND ($notify))
 578                         $network  = NETWORK_OSTATUS;
 579
 580                 if(strpos($url,'@'))
 581                         $addr = str_replace('acct:', '', $url);
 582
 583                 $priority = 0;
 584
 585                 if($hcard && ! $vcard) {
 586                         $vcard = scrape_vcard($hcard);
 587
 588                         // Google doesn't use absolute url in profile photos
 589
 590                         if((x($vcard,'photo')) && substr($vcard['photo'],0,1) == '/') {
 591                                 $h = @parse_url($hcard);
 592                                 if($h)
 593                                         $vcard['photo'] = $h['scheme'] . '://' . $h['host'] . $vcard['photo'];
 594                         }
 595
 596                         logger('probe_url: scrape_vcard: ' . print_r($vcard,true), LOGGER_DATA);
 597                 }
 598
 599                 if($diaspora && $addr) {
 600                         // Diaspora returns the name as the nick. As the nick will never be updated,
 601                         // let's use the Diaspora nickname (the first part of the handle) as the nick instead
 602                         $addr_parts = explode('@', $addr);
 603                         $vcard['nick'] = $addr_parts[0];
 604                 }
 605
 606                 if($lastfm) {
 607                         $profile = $url;
 608                         $poll = str_replace(array('www.','last.fm/'),array('','ws.audioscrobbler.com/1.0/'),$url) . '/recenttracks.rss';
 609                         $vcard['nick'] = basename($url);
 610                         $vcard['fn'] = $vcard['nick'] . t(' on Last.fm');
 611                         $network = NETWORK_FEED;
 612                 }
 613
 614                 if(! x($vcard,'fn'))
 615                         if(x($vcard,'nick'))
 616                                 $vcard['fn'] = $vcard['nick'];
 617
 618                 $check_feed = false;
 619
 620                 if(stristr($url,'tumblr.com') && (! stristr($url,'/rss'))) {
 621                         $poll = $url . '/rss';
 622                         $check_feed = true;
 623                         // Will leave it to others to figure out how to grab the avatar, which is on the $url page in the open graph meta links
 624                 }
 625
 626                 if($appnet || ! $poll)
 627                         $check_feed = true;
 628                 if((! isset($vcard)) || (! x($vcard,'fn')) || (! $profile))
 629                         $check_feed = true;
 630                 if(($at_addr) && (! count($links)))
 631                         $check_feed = false;
 632
 633                 if ($connectornetworks)
 634                         $check_feed = false;
 635
 636                 if($check_feed) {
 637
 638                         $feedret = scrape_feed(($poll) ? $poll : $url);
 639
 640                         logger('probe_url: scrape_feed ' . (($poll)? $poll : $url) . ' returns: ' . print_r($feedret,true), LOGGER_DATA);
 641                         if(count($feedret) && ($feedret['feed_atom'] || $feedret['feed_rss'])) {
 642                                 $poll = ((x($feedret,'feed_atom')) ? unamp($feedret['feed_atom']) : unamp($feedret['feed_rss']));
 643                                 if(! x($vcard))
 644                                         $vcard = array();
 645                         }
 646
 647                         if(x($feedret,'photo') && (! x($vcard,'photo')))
 648                                 $vcard['photo'] = $feedret['photo'];
 649
 650                         $cookiejar = tempnam(get_temppath(), 'cookiejar-scrape-feed-');
 651                         $xml = fetch_url($poll, false, $redirects, 0, Null, $cookiejar);
 652                         unlink($cookiejar);
 653
 654                         logger('probe_url: fetch feed: ' . $poll . ' returns: ' . $xml, LOGGER_DATA);
 655
 656                         if ($xml == "") {
 657                                 logger("scrape_feed: XML is empty for feed ".$poll);
 658                                 $network = NETWORK_PHANTOM;
 659                         } else {
 660                                 $data = feed_import($xml,$dummy1,$dummy2, $dummy3, true);
 661
 662                                 if (!is_array($data)) {
 663                                         logger("scrape_feed: This doesn't seem to be a feed: ".$poll);
 664                                         $network = NETWORK_PHANTOM;
 665                                 } else {
 666                                         if (($vcard["photo"] == "") AND ($data["header"]["author-avatar"] != ""))
 667                                                 $vcard["photo"] = $data["header"]["author-avatar"];
 668
 669                                         if (($vcard["fn"] == "") AND ($data["header"]["author-name"] != ""))
 670                                                 $vcard["fn"] = $data["header"]["author-name"];
 671
 672                                         if (($vcard["nick"] == "") AND ($data["header"]["author-nick"] != ""))
 673                                                 $vcard["nick"] = $data["header"]["author-nick"];
 674
 675                                         if(!$profile AND ($data["header"]["author-link"] != "") AND !in_array($network, array("", NETWORK_FEED)))
 676                                                 $profile = $data["header"]["author-link"];
 677                                 }
 678                         }
 679
 680                         // Workaround for misconfigured Friendica servers
 681                         if (($network == "") AND (strstr($url, "/profile/"))) {
 682                                 $noscrape = str_replace("/profile/", "/noscrape/", $url);
 683                                 $noscrapejson = fetch_url($noscrape);
 684                                 if ($noscrapejson) {
 685
 686                                         $network = NETWORK_DFRN;
 687
 688                                         $poco = str_replace("/profile/", "/poco/", $url);
 689
 690                                         $noscrapedata = json_decode($noscrapejson, true);
 691
 692                                         if (isset($noscrapedata["addr"]))
 693                                                 $addr = $noscrapedata["addr"];
 694
 695                                         if (isset($noscrapedata["fn"]))
 696                                                 $vcard["fn"] = $noscrapedata["fn"];
 697
 698                                         if (isset($noscrapedata["key"]))
 699                                                 $pubkey = $noscrapedata["key"];
 700
 701                                         if (isset($noscrapedata["photo"]))
 702                                                 $vcard["photo"] = $noscrapedata["photo"];
 703
 704                                         if (isset($noscrapedata["dfrn-request"]))
 705                                                 $request = $noscrapedata["dfrn-request"];
 706
 707                                         if (isset($noscrapedata["dfrn-confirm"]))
 708                                                 $confirm = $noscrapedata["dfrn-confirm"];
 709
 710                                         if (isset($noscrapedata["dfrn-notify"]))
 711                                                 $notify = $noscrapedata["dfrn-notify"];
 712
 713                                         if (isset($noscrapedata["dfrn-poll"]))
 714                                                 $poll = $noscrapedata["dfrn-poll"];
 715
 716                                 }
 717                         }
 718
 719                         if(! $network)
 720                                 $network = NETWORK_FEED;
 721
 722                         if(! x($vcard,'nick')) {
 723                                 $vcard['nick'] = strtolower(notags(unxmlify($vcard['fn'])));
 724                                 if(strpos($vcard['nick'],' '))
 725                                         $vcard['nick'] = trim(substr($vcard['nick'],0,strpos($vcard['nick'],' ')));
 726                         }
 727                         if(! $priority)
 728                                 $priority = 2;
 729                 }
 730         }
 731
 732         if(! x($vcard,'photo')) {
 733                 $a = get_app();
 734                 $vcard['photo'] = App::get_baseurl() . '/images/person-175.jpg' ;
 735         }
 736
 737         if(! $profile)
 738                 $profile = $url;
 739
 740         // No human could be associated with this link, use the URL as the contact name
 741
 742         if(($network === NETWORK_FEED) && ($poll) && (! x($vcard,'fn')))
 743                 $vcard['fn'] = $url;
 744
 745         if (($notify != "") AND ($poll != "")) {
 746                 $baseurl = matching(normalise_link($notify), normalise_link($poll));
 747
 748                 $baseurl2 = matching($baseurl, normalise_link($profile));
 749                 if ($baseurl2 != "")
 750                         $baseurl = $baseurl2;
 751         }
 752
 753         if (($baseurl == "") AND ($notify != ""))
 754                 $baseurl = matching(normalise_link($profile), normalise_link($notify));
 755
 756         if (($baseurl == "") AND ($poll != ""))
 757                 $baseurl = matching(normalise_link($profile), normalise_link($poll));
 758
 759         $baseurl = rtrim($baseurl, "/");
 760
 761         if(strpos($url,'@') AND ($addr == "") AND ($network == NETWORK_DFRN))
 762                 $addr = str_replace('acct:', '', $url);
 763
 764         $vcard['fn'] = notags($vcard['fn']);
 765         $vcard['nick'] = str_replace(' ','',notags($vcard['nick']));
 766
 767         $result['name'] = $vcard['fn'];
 768         $result['nick'] = $vcard['nick'];
 769         $result['url'] = $profile;
 770         $result['addr'] = $addr;
 771         $result['batch'] = $batch;
 772         $result['notify'] = $notify;
 773         $result['poll'] = $poll;
 774         $result['request'] = $request;
 775         $result['confirm'] = $confirm;
 776         $result['poco'] = $poco;
 777         $result['photo'] = $vcard['photo'];
 778         $result['priority'] = $priority;
 779         $result['network'] = $network;
 780         $result['alias'] = $alias;
 781         $result['pubkey'] = $pubkey;
 782         $result['baseurl'] = $baseurl;
 783
 784         logger('probe_url: ' . print_r($result,true), LOGGER_DEBUG);
 785
 786         if ($level == 1) {
 787                 // Trying if it maybe a diaspora account
 788                 if (($result['network'] == NETWORK_FEED) OR ($result['addr'] == "")) {
 789                         require_once('include/bbcode.php');
 790                         $address = GetProfileUsername($url, "", true);
 791                         $result2 = probe_url($address, $mode, ++$level);
 792                         if ($result2['network'] != "")
 793                                 $result = $result2;
 794                 }
 795
 796                 // Maybe it's some non standard GNU Social installation (Single user, subfolder or no uri rewrite)
 797                 if (($result['network'] == NETWORK_FEED) AND ($result['baseurl'] != "") AND ($result['nick'] != "")) {
 798                         $addr = $result['nick'].'@'.str_replace("http://", "", $result['baseurl']);
 799                         $result2 = probe_url($addr, $mode, ++$level);
 800                         if (($result2['network'] != "") AND ($result2['network'] != NETWORK_FEED))
 801                                 $result = $result2;
 802                 }
 803         }
 804
 805         // Only store into the cache if the value seems to be valid
 806         if ($result['network'] != NETWORK_PHANTOM)
 807                 Cache::set("probe_url:".$mode.":".$url,serialize($result), CACHE_DAY);
 808
 809         return $result;
 810 }
 811
 812 function matching($part1, $part2) {
 813         $len = min(strlen($part1), strlen($part2));
 814
 815         $match = "";
 816         $matching = true;
 817         $i = 0;
 818         while (($i <= $len) AND $matching) {
 819                 if (substr($part1, $i, 1) == substr($part2, $i, 1))
 820                         $match .= substr($part1, $i, 1);
 821                 else
 822                         $matching = false;
 823
 824                 $i++;
 825         }
 826         return($match);
 827 }