include/Scrape.php

   1 <?php
   2
   3 require_once('library/HTML5/Parser.php');
   4 require_once('include/crypto.php');
   5
   6 if(! function_exists('scrape_dfrn')) {
   7 function scrape_dfrn($url) {
   8
   9         $a = get_app();
  10
  11         $ret = array();
  12
  13         logger('scrape_dfrn: url=' . $url);
  14
  15         $s = fetch_url($url);
  16
  17         if(! $s)
  18                 return $ret;
  19
  20         $headers = $a->get_curl_headers();
  21         logger('scrape_dfrn: headers=' . $headers, LOGGER_DEBUG);
  22
  23
  24         $lines = explode("\n",$headers);
  25         if(count($lines)) {
  26                 foreach($lines as $line) {
  27                         // don't try and run feeds through the html5 parser
  28                         if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
  29                                 return ret;
  30                 }
  31         }
  32
  33         try {
  34                 $dom = HTML5_Parser::parse($s);
  35         } catch (DOMException $e) {
  36                 logger('scrape_dfrn: parse error: ' . $e);
  37         }
  38
  39         if(! $dom)
  40                 return $ret;
  41
  42         $items = $dom->getElementsByTagName('link');
  43
  44         // get DFRN link elements
  45
  46         foreach($items as $item) {
  47                 $x = $item->getAttribute('rel');
  48                 if(($x === 'alternate') && ($item->getAttribute('type') === 'application/atom+xml'))
  49                         $ret['feed_atom'] = $item->getAttribute('href');
  50                 if(substr($x,0,5) == "dfrn-") {
  51                         $ret[$x] = $item->getAttribute('href');
  52                 }
  53                 if($x === 'lrdd') {
  54                         $decoded = urldecode($item->getAttribute('href'));
  55                         if(preg_match('/acct:([^@]*)@/',$decoded,$matches))
  56                                 $ret['nick'] = $matches[1];
  57                 }
  58         }
  59
  60         // Pull out hCard profile elements
  61
  62         $largest_photo = 0;
  63
  64         $items = $dom->getElementsByTagName('*');
  65         foreach($items as $item) {
  66                 if(attribute_contains($item->getAttribute('class'), 'vcard')) {
  67                         $level2 = $item->getElementsByTagName('*');
  68                         foreach($level2 as $x) {
  69                                 if(attribute_contains($x->getAttribute('class'),'fn')) {
  70                                         $ret['fn'] = $x->textContent;
  71                                 }
  72                                 if((attribute_contains($x->getAttribute('class'),'photo'))
  73                                         || (attribute_contains($x->getAttribute('class'),'avatar'))) {
  74                                         $size = intval($x->getAttribute('width'));
  75                                         // dfrn prefers 175, so if we find this, we set largest_size so it can't be topped.
  76                                         if(($size > $largest_photo) || ($size == 175) || (! $largest_photo)) {
  77                                                 $ret['photo'] = $x->getAttribute('src');
  78                                                 $largest_photo = (($size == 175) ? 9999 : $size);
  79                                         }
  80                                 }
  81                                 if(attribute_contains($x->getAttribute('class'),'key')) {
  82                                         $ret['key'] = $x->textContent;
  83                                 }
  84                         }
  85                 }
  86         }
  87
  88         return $ret;
  89 }}
  90
  91
  92
  93
  94
  95
  96 if(! function_exists('validate_dfrn')) {
  97 function validate_dfrn($a) {
  98         $errors = 0;
  99         if(! x($a,'key'))
 100                 $errors ++;
 101         if(! x($a,'dfrn-request'))
 102                 $errors ++;
 103         if(! x($a,'dfrn-confirm'))
 104                 $errors ++;
 105         if(! x($a,'dfrn-notify'))
 106                 $errors ++;
 107         if(! x($a,'dfrn-poll'))
 108                 $errors ++;
 109         return $errors;
 110 }}
 111
 112 if(! function_exists('scrape_meta')) {
 113 function scrape_meta($url) {
 114
 115         $a = get_app();
 116
 117         $ret = array();
 118
 119         logger('scrape_meta: url=' . $url);
 120
 121         $s = fetch_url($url);
 122
 123         if(! $s)
 124                 return $ret;
 125
 126         $headers = $a->get_curl_headers();
 127         logger('scrape_meta: headers=' . $headers, LOGGER_DEBUG);
 128
 129         $lines = explode("\n",$headers);
 130         if(count($lines)) {
 131                 foreach($lines as $line) {
 132                         // don't try and run feeds through the html5 parser
 133                         if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
 134                                 return ret;
 135                 }
 136         }
 137
 138         try {
 139                 $dom = HTML5_Parser::parse($s);
 140         } catch (DOMException $e) {
 141                 logger('scrape_meta: parse error: ' . $e);
 142         }
 143
 144         if(! $dom)
 145                 return $ret;
 146
 147         $items = $dom->getElementsByTagName('meta');
 148
 149         // get DFRN link elements
 150
 151         foreach($items as $item) {
 152                 $x = $item->getAttribute('name');
 153                 if(substr($x,0,5) == "dfrn-")
 154                         $ret[$x] = $item->getAttribute('content');
 155         }
 156
 157         return $ret;
 158 }}
 159
 160
 161 if(! function_exists('scrape_vcard')) {
 162 function scrape_vcard($url) {
 163
 164         $a = get_app();
 165
 166         $ret = array();
 167
 168         logger('scrape_vcard: url=' . $url);
 169
 170         $s = fetch_url($url);
 171
 172         if(! $s)
 173                 return $ret;
 174
 175         $headers = $a->get_curl_headers();
 176         $lines = explode("\n",$headers);
 177         if(count($lines)) {
 178                 foreach($lines as $line) {
 179                         // don't try and run feeds through the html5 parser
 180                         if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
 181                                 return ret;
 182                 }
 183         }
 184
 185         try {
 186                 $dom = HTML5_Parser::parse($s);
 187         } catch (DOMException $e) {
 188                 logger('scrape_vcard: parse error: ' . $e);
 189         }
 190
 191         if(! $dom)
 192                 return $ret;
 193
 194         // Pull out hCard profile elements
 195
 196         $largest_photo = 0;
 197
 198         $items = $dom->getElementsByTagName('*');
 199         foreach($items as $item) {
 200                 if(attribute_contains($item->getAttribute('class'), 'vcard')) {
 201                         $level2 = $item->getElementsByTagName('*');
 202                         foreach($level2 as $x) {
 203                                 if(attribute_contains($x->getAttribute('class'),'fn'))
 204                                         $ret['fn'] = $x->textContent;
 205                                 if((attribute_contains($x->getAttribute('class'),'photo'))
 206                                         || (attribute_contains($x->getAttribute('class'),'avatar'))) {
 207                                         $size = intval($x->getAttribute('width'));
 208                                         if(($size > $largest_photo) || (! $largest_photo)) {
 209                                                 $ret['photo'] = $x->getAttribute('src');
 210                                                 $largest_photo = $size;
 211                                         }
 212                                 }
 213                                 if((attribute_contains($x->getAttribute('class'),'nickname'))
 214                                         || (attribute_contains($x->getAttribute('class'),'uid'))) {
 215                                         $ret['nick'] = $x->textContent;
 216                                 }
 217                         }
 218                 }
 219         }
 220
 221         return $ret;
 222 }}
 223
 224
 225 if(! function_exists('scrape_feed')) {
 226 function scrape_feed($url) {
 227
 228         $a = get_app();
 229
 230         $ret = array();
 231         $s = fetch_url($url);
 232
 233         $headers = $a->get_curl_headers();
 234         $code = $a->get_curl_code();
 235
 236         logger('scrape_feed: returns: ' . $code . ' headers=' . $headers, LOGGER_DEBUG);
 237
 238         if(! $s) {
 239                 logger('scrape_feed: no data returned for ' . $url);
 240                 return $ret;
 241         }
 242
 243
 244         $lines = explode("\n",$headers);
 245         if(count($lines)) {
 246                 foreach($lines as $line) {
 247                         if(stristr($line,'content-type:')) {
 248                                 if(stristr($line,'application/atom+xml') || stristr($s,'<feed')) {
 249                                         $ret['feed_atom'] = $url;
 250                                         return $ret;
 251                                 }
 252                                 if(stristr($line,'application/rss+xml') || stristr($s,'<rss')) {
 253                                         $ret['feed_rss'] = $url;
 254                                         return $ret;
 255                                 }
 256                         }
 257                 }
 258                 // perhaps an RSS version 1 feed with a generic or incorrect content-type?
 259                 if(stristr($s,'</item>')) {
 260                         $ret['feed_rss'] = $url;
 261                         return $ret;
 262                 }
 263         }
 264
 265         try {
 266                 $dom = HTML5_Parser::parse($s);
 267         } catch (DOMException $e) {
 268                 logger('scrape_feed: parse error: ' . $e);
 269         }
 270
 271         if(! $dom) {
 272                 logger('scrape_feed: failed to parse.');
 273                 return $ret;
 274         }
 275
 276
 277         $head = $dom->getElementsByTagName('base');
 278         if($head) {
 279                 foreach($head as $head0) {
 280                         $basename = $head0->getAttribute('href');
 281                         break;
 282                 }
 283         }
 284         if(! $basename)
 285                 $basename = implode('/', array_slice(explode('/',$url),0,3)) . '/';
 286
 287         $items = $dom->getElementsByTagName('link');
 288
 289         // get Atom/RSS link elements, take the first one of either.
 290
 291         if($items) {
 292                 foreach($items as $item) {
 293                         $x = $item->getAttribute('rel');
 294                         if(($x === 'alternate') && ($item->getAttribute('type') === 'application/atom+xml')) {
 295                                 if(! x($ret,'feed_atom'))
 296                                         $ret['feed_atom'] = $item->getAttribute('href');
 297                         }
 298                         if(($x === 'alternate') && ($item->getAttribute('type') === 'application/rss+xml')) {
 299                                 if(! x($ret,'feed_rss'))
 300                                         $ret['feed_rss'] = $item->getAttribute('href');
 301                         }
 302                 }
 303         }
 304
 305         // Drupal and perhaps others only provide relative URL's. Turn them into absolute.
 306
 307         if(x($ret,'feed_atom') && (! strstr($ret['feed_atom'],'://')))
 308                 $ret['feed_atom'] = $basename . $ret['feed_atom'];
 309         if(x($ret,'feed_rss') && (! strstr($ret['feed_rss'],'://')))
 310                 $ret['feed_rss'] = $basename . $ret['feed_rss'];
 311
 312         return $ret;
 313 }}
 314
 315
 316 /**
 317  *
 318  * Probe a network address to discover what kind of protocols we need to communicate with it.
 319  *
 320  * Warning: this function is a bit touchy and there are some subtle dependencies within the logic flow.
 321  * Edit with care.
 322  *
 323  */
 324
 325 /**
 326  *
 327  * PROBE_DIASPORA has a bias towards returning Diaspora information
 328  * while PROBE_NORMAL has a bias towards dfrn/zot - in the case where
 329  * an address (such as a Friendica address) supports more than one type
 330  * of network.
 331  *
 332  */
 333
 334
 335 define ( 'PROBE_NORMAL',   0);
 336 define ( 'PROBE_DIASPORA', 1);
 337
 338 function probe_url($url, $mode = PROBE_NORMAL) {
 339         require_once('include/email.php');
 340
 341         $result = array();
 342
 343         if(! $url)
 344                 return $result;
 345
 346         $result = Cache::get("probe_url:".$mode.":".$url);
 347         if (!is_null($result)) {
 348                 $result = unserialize($result);
 349                 return $result;
 350         }
 351
 352         $network = null;
 353         $diaspora = false;
 354         $diaspora_base = '';
 355         $diaspora_guid = '';
 356         $diaspora_key = '';
 357         $has_lrdd = false;
 358         $email_conversant = false;
 359         $connectornetworks = false;
 360         $appnet = false;
 361
 362         if (strpos($url,'twitter.com')) {
 363                 $connectornetworks = true;
 364                 $network = NETWORK_TWITTER;
 365         }
 366
 367         // Twitter is deactivated since twitter closed its old API
 368         //$twitter = ((strpos($url,'twitter.com') !== false) ? true : false);
 369         $lastfm  = ((strpos($url,'last.fm/user') !== false) ? true : false);
 370
 371         $at_addr = ((strpos($url,'@') !== false) ? true : false);
 372
 373         if((!$appnet) && (!$lastfm) && !$connectornetworks) {
 374
 375                 if(strpos($url,'mailto:') !== false && $at_addr) {
 376                         $url = str_replace('mailto:','',$url);
 377                         $links = array();
 378                 }
 379                 else
 380                         $links = lrdd($url);
 381
 382                 if(count($links)) {
 383                         $has_lrdd = true;
 384
 385                         logger('probe_url: found lrdd links: ' . print_r($links,true), LOGGER_DATA);
 386                         foreach($links as $link) {
 387                                 if($link['@attributes']['rel'] === NAMESPACE_ZOT)
 388                                         $zot = unamp($link['@attributes']['href']);
 389                                 if($link['@attributes']['rel'] === NAMESPACE_DFRN)
 390                                         $dfrn = unamp($link['@attributes']['href']);
 391                                 if($link['@attributes']['rel'] === 'salmon')
 392                                         $notify = unamp($link['@attributes']['href']);
 393                                 if($link['@attributes']['rel'] === NAMESPACE_FEED)
 394                                         $poll = unamp($link['@attributes']['href']);
 395                                 if($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
 396                                         $hcard = unamp($link['@attributes']['href']);
 397                                 if($link['@attributes']['rel'] === 'http://webfinger.net/rel/profile-page')
 398                                         $profile = unamp($link['@attributes']['href']);
 399                                 if($link['@attributes']['rel'] === 'http://portablecontacts.net/spec/1.0')
 400                                         $poco = unamp($link['@attributes']['href']);
 401                                 if($link['@attributes']['rel'] === 'http://joindiaspora.com/seed_location') {
 402                                         $diaspora_base = unamp($link['@attributes']['href']);
 403                                         $diaspora = true;
 404                                 }
 405                                 if($link['@attributes']['rel'] === 'http://joindiaspora.com/guid') {
 406                                         $diaspora_guid = unamp($link['@attributes']['href']);
 407                                         $diaspora = true;
 408                                 }
 409                                 if($link['@attributes']['rel'] === 'diaspora-public-key') {
 410                                         $diaspora_key = base64_decode(unamp($link['@attributes']['href']));
 411                                         if(strstr($diaspora_key,'RSA '))
 412                                                 $pubkey = rsatopem($diaspora_key);
 413                                         else
 414                                                 $pubkey = $diaspora_key;
 415                                         $diaspora = true;
 416                                 }
 417                                 if($link['@attributes']['rel'] === 'http://ostatus.org/schema/1.0/subscribe') {
 418                                         $diaspora = false;
 419                                 }
 420                         }
 421
 422                         // Status.Net can have more than one profile URL. We need to match the profile URL
 423                         // to a contact on incoming messages to prevent spam, and we won't know which one
 424                         // to match. So in case of two, one of them is stored as an alias. Only store URL's
 425                         // and not webfinger user@host aliases. If they've got more than two non-email style
 426                         // aliases, let's hope we're lucky and get one that matches the feed author-uri because
 427                         // otherwise we're screwed.
 428
 429                         foreach($links as $link) {
 430                                 if($link['@attributes']['rel'] === 'alias') {
 431                                         if(strpos($link['@attributes']['href'],'@') === false) {
 432                                                 if(isset($profile)) {
 433                                                         if($link['@attributes']['href'] !== $profile)
 434                                                                 $alias = unamp($link['@attributes']['href']);
 435                                                 }
 436                                                 else
 437                                                         $profile = unamp($link['@attributes']['href']);
 438                                         }
 439                                 }
 440                         }
 441
 442                         // If the profile is different from the url then the url is abviously an alias
 443                         if (($alias == "") AND ($profile != "") AND !$at_addr AND (normalise_link($profile) != normalise_link($url)))
 444                                 $alias = $url;
 445                 }
 446                 elseif($mode == PROBE_NORMAL) {
 447
 448                         // Check email
 449
 450                         $orig_url = $url;
 451                         if((strpos($orig_url,'@')) && validate_email($orig_url)) {
 452                                 $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1",
 453                                         intval(local_user())
 454                                 );
 455                                 $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1",
 456                                         intval(local_user())
 457                                 );
 458                                 if(count($x) && count($r)) {
 459                                         $mailbox = construct_mailbox_name($r[0]);
 460                                         $password = '';
 461                                         openssl_private_decrypt(hex2bin($r[0]['pass']),$password,$x[0]['prvkey']);
 462                                         $mbox = email_connect($mailbox,$r[0]['user'],$password);
 463                                         if(! $mbox)
 464                                                 logger('probe_url: email_connect failed.');
 465                                         unset($password);
 466                                 }
 467                                 if($mbox) {
 468                                         $msgs = email_poll($mbox,$orig_url);
 469                                         logger('probe_url: searching ' . $orig_url . ', ' . count($msgs) . ' messages found.', LOGGER_DEBUG);
 470                                         if(count($msgs)) {
 471                                                 $addr = $orig_url;
 472                                                 $network = NETWORK_MAIL;
 473                                                 $name = substr($url,0,strpos($url,'@'));
 474                                                 $phost = substr($url,strpos($url,'@')+1);
 475                                                 $profile = 'http://' . $phost;
 476                                                 // fix nick character range
 477                                                 $vcard = array('fn' => $name, 'nick' => $name, 'photo' => avatar_img($url));
 478                                                 $notify = 'smtp ' . random_string();
 479                                                 $poll = 'email ' . random_string();
 480                                                 $priority = 0;
 481                                                 $x = email_msg_meta($mbox,$msgs[0]);
 482                                                 if(stristr($x[0]->from,$orig_url))
 483                                                         $adr = imap_rfc822_parse_adrlist($x[0]->from,'');
 484                                                 elseif(stristr($x[0]->to,$orig_url))
 485                                                         $adr = imap_rfc822_parse_adrlist($x[0]->to,'');
 486                                                 if(isset($adr)) {
 487                                                         foreach($adr as $feadr) {
 488                                                                 if((strcasecmp($feadr->mailbox,$name) == 0)
 489                                                                         &&(strcasecmp($feadr->host,$phost) == 0)
 490                                                                         && (strlen($feadr->personal))) {
 491
 492                                                                         $personal = imap_mime_header_decode($feadr->personal);
 493                                                                         $vcard['fn'] = "";
 494                                                                         foreach($personal as $perspart)
 495                                                                                 if ($perspart->charset != "default")
 496                                                                                         $vcard['fn'] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
 497                                                                                 else
 498                                                                                         $vcard['fn'] .= $perspart->text;
 499
 500                                                                         $vcard['fn'] = notags($vcard['fn']);
 501                                                                 }
 502                                                         }
 503                                                 }
 504                                         }
 505                                         imap_close($mbox);
 506                                 }
 507                         }
 508                 }
 509         }
 510
 511         if($mode == PROBE_NORMAL) {
 512                 if(strlen($zot)) {
 513                         $s = fetch_url($zot);
 514                         if($s) {
 515                                 $j = json_decode($s);
 516                                 if($j) {
 517                                         $network = NETWORK_ZOT;
 518                                         $vcard   = array(
 519                                                 'fn'    => $j->fullname,
 520                                                 'nick'  => $j->nickname,
 521                                                 'photo' => $j->photo
 522                                         );
 523                                         $profile  = $j->url;
 524                                         $notify   = $j->post;
 525                                         $pubkey   = $j->pubkey;
 526                                         $poll     = 'N/A';
 527                                 }
 528                         }
 529                 }
 530
 531                 if(strlen($dfrn)) {
 532                         $ret = scrape_dfrn(($hcard) ? $hcard : $dfrn);
 533                         if(is_array($ret) && x($ret,'dfrn-request')) {
 534                                 $network = NETWORK_DFRN;
 535                                 $request = $ret['dfrn-request'];
 536                                 $confirm = $ret['dfrn-confirm'];
 537                                 $notify  = $ret['dfrn-notify'];
 538                                 $poll    = $ret['dfrn-poll'];
 539
 540                                 $vcard = array();
 541                                 $vcard['fn'] = $ret['fn'];
 542                                 $vcard['nick'] = $ret['nick'];
 543                                 $vcard['photo'] = $ret['photo'];
 544                         }
 545                 }
 546         }
 547
 548         if($diaspora && $diaspora_base && $diaspora_guid) {
 549                 if($mode == PROBE_DIASPORA || ! $notify) {
 550                         $notify = $diaspora_base . 'receive/users/' . $diaspora_guid;
 551                         $batch  = $diaspora_base . 'receive/public' ;
 552                 }
 553                 if(strpos($url,'@'))
 554                         $addr = str_replace('acct:', '', $url);
 555         }
 556
 557         if($network !== NETWORK_ZOT && $network !== NETWORK_DFRN && $network !== NETWORK_MAIL) {
 558                 if($diaspora)
 559                         $network = NETWORK_DIASPORA;
 560                 elseif($has_lrdd)
 561                         $network  = NETWORK_OSTATUS;
 562
 563                 if(strpos($url,'@'))
 564                         $addr = str_replace('acct:', '', $url);
 565
 566                 $priority = 0;
 567
 568                 if($hcard && ! $vcard) {
 569                         $vcard = scrape_vcard($hcard);
 570
 571                         // Google doesn't use absolute url in profile photos
 572
 573                         if((x($vcard,'photo')) && substr($vcard['photo'],0,1) == '/') {
 574                                 $h = @parse_url($hcard);
 575                                 if($h)
 576                                         $vcard['photo'] = $h['scheme'] . '://' . $h['host'] . $vcard['photo'];
 577                         }
 578
 579                         logger('probe_url: scrape_vcard: ' . print_r($vcard,true), LOGGER_DATA);
 580                 }
 581
 582                 if($diaspora && $addr) {
 583                         // Diaspora returns the name as the nick. As the nick will never be updated,
 584                         // let's use the Diaspora nickname (the first part of the handle) as the nick instead
 585                         $addr_parts = explode('@', $addr);
 586                         $vcard['nick'] = $addr_parts[0];
 587                 }
 588
 589                 /* if($twitter) {
 590                         logger('twitter: setup');
 591                         $tid = basename($url);
 592                         $tapi = 'https://api.twitter.com/1/statuses/user_timeline.rss';
 593                         if(intval($tid))
 594                                 $poll = $tapi . '?user_id=' . $tid;
 595                         else
 596                                 $poll = $tapi . '?screen_name=' . $tid;
 597                         $profile = 'http://twitter.com/#!/' . $tid;
 598                         //$vcard['photo'] = 'https://api.twitter.com/1/users/profile_image/' . $tid;
 599                         $vcard['photo'] = 'https://api.twitter.com/1/users/profile_image?screen_name=' . $tid . '&size=bigger';
 600                         $vcard['nick'] = $tid;
 601                         $vcard['fn'] = $tid;
 602                 } */
 603
 604                 if($lastfm) {
 605                         $profile = $url;
 606                         $poll = str_replace(array('www.','last.fm/'),array('','ws.audioscrobbler.com/1.0/'),$url) . '/recenttracks.rss';
 607                         $vcard['nick'] = basename($url);
 608                         $vcard['fn'] = $vcard['nick'] . t(' on Last.fm');
 609                         $network = NETWORK_FEED;
 610                 }
 611
 612                 if(! x($vcard,'fn'))
 613                         if(x($vcard,'nick'))
 614                                 $vcard['fn'] = $vcard['nick'];
 615
 616                 $check_feed = false;
 617
 618                 if(stristr($url,'tumblr.com') && (! stristr($url,'/rss'))) {
 619                         $poll = $url . '/rss';
 620                         $check_feed = true;
 621                         // Will leave it to others to figure out how to grab the avatar, which is on the $url page in the open graph meta links
 622                 }
 623
 624                 if($appnet || ! $poll)
 625                         $check_feed = true;
 626                 if((! isset($vcard)) || (! x($vcard,'fn')) || (! $profile))
 627                         $check_feed = true;
 628                 if(($at_addr) && (! count($links)))
 629                         $check_feed = false;
 630
 631                 if ($connectornetworks)
 632                         $check_feed = false;
 633
 634                 if($check_feed) {
 635
 636                         $feedret = scrape_feed(($poll) ? $poll : $url);
 637                         logger('probe_url: scrape_feed ' . (($poll)? $poll : $url) . ' returns: ' . print_r($feedret,true), LOGGER_DATA);
 638                         if(count($feedret) && ($feedret['feed_atom'] || $feedret['feed_rss'])) {
 639                                 $poll = ((x($feedret,'feed_atom')) ? unamp($feedret['feed_atom']) : unamp($feedret['feed_rss']));
 640                                 if(! x($vcard))
 641                                         $vcard = array();
 642                         }
 643
 644                         if(x($feedret,'photo') && (! x($vcard,'photo')))
 645                                 $vcard['photo'] = $feedret['photo'];
 646                         require_once('library/simplepie/simplepie.inc');
 647                         $feed = new SimplePie();
 648                         $xml = fetch_url($poll);
 649
 650                         logger('probe_url: fetch feed: ' . $poll . ' returns: ' . $xml, LOGGER_DATA);
 651                         $a = get_app();
 652
 653                         logger('probe_url: scrape_feed: headers: ' . $a->get_curl_headers(), LOGGER_DATA);
 654
 655                         // Don't try and parse an empty string
 656                         $feed->set_raw_data(($xml) ? $xml : '<?xml version="1.0" encoding="utf-8" ?><xml></xml>');
 657
 658                         $feed->init();
 659                         if($feed->error())
 660                                 logger('probe_url: scrape_feed: Error parsing XML: ' . $feed->error());
 661
 662
 663                         if(! x($vcard,'photo'))
 664                                 $vcard['photo'] = $feed->get_image_url();
 665                         $author = $feed->get_author();
 666
 667                         if($author) {
 668                                 $vcard['fn'] = unxmlify(trim($author->get_name()));
 669                                 if(! $vcard['fn'])
 670                                         $vcard['fn'] = trim(unxmlify($author->get_email()));
 671                                 if(strpos($vcard['fn'],'@') !== false)
 672                                         $vcard['fn'] = substr($vcard['fn'],0,strpos($vcard['fn'],'@'));
 673                                 $email = unxmlify($author->get_email());
 674                                 if(! $profile && $author->get_link())
 675                                         $profile = trim(unxmlify($author->get_link()));
 676                                 if(! $vcard['photo']) {
 677                                         $rawtags = $feed->get_feed_tags( SIMPLEPIE_NAMESPACE_ATOM_10, 'author');
 678                                         if($rawtags) {
 679                                                 $elems = $rawtags[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10];
 680                                                 if((x($elems,'link')) && ($elems['link'][0]['attribs']['']['rel'] === 'photo'))
 681                                                         $vcard['photo'] = $elems['link'][0]['attribs']['']['href'];
 682                                         }
 683                                 }
 684                         }
 685                         else {
 686                                 $item = $feed->get_item(0);
 687                                 if($item) {
 688                                         $author = $item->get_author();
 689                                         if($author) {
 690                                                 $vcard['fn'] = trim(unxmlify($author->get_name()));
 691                                                 if(! $vcard['fn'])
 692                                                         $vcard['fn'] = trim(unxmlify($author->get_email()));
 693                                                 if(strpos($vcard['fn'],'@') !== false)
 694                                                         $vcard['fn'] = substr($vcard['fn'],0,strpos($vcard['fn'],'@'));
 695                                                 $email = unxmlify($author->get_email());
 696                                                 if(! $profile && $author->get_link())
 697                                                         $profile = trim(unxmlify($author->get_link()));
 698                                         }
 699                                         if(! $vcard['photo']) {
 700                                                 $rawmedia = $item->get_item_tags('http://search.yahoo.com/mrss/','thumbnail');
 701                                                 if($rawmedia && $rawmedia[0]['attribs']['']['url'])
 702                                                         $vcard['photo'] = unxmlify($rawmedia[0]['attribs']['']['url']);
 703                                         }
 704                                         if(! $vcard['photo']) {
 705                                                 $rawtags = $item->get_item_tags( SIMPLEPIE_NAMESPACE_ATOM_10, 'author');
 706                                                 if($rawtags) {
 707                                                         $elems = $rawtags[0]['child'][SIMPLEPIE_NAMESPACE_ATOM_10];
 708                                                         if((x($elems,'link')) && ($elems['link'][0]['attribs']['']['rel'] === 'photo'))
 709                                                                 $vcard['photo'] = $elems['link'][0]['attribs']['']['href'];
 710                                                 }
 711                                         }
 712                                 }
 713                         }
 714
 715                         if((! $vcard['photo']) && strlen($email))
 716                                 $vcard['photo'] = avatar_img($email);
 717                         if($poll === $profile)
 718                                 $lnk = $feed->get_permalink();
 719                         if(isset($lnk) && strlen($lnk))
 720                                 $profile = $lnk;
 721
 722                         if(! $network) {
 723                                 $network = NETWORK_FEED;
 724                                 // If it is a feed, don't take the author name as feed name
 725                                 unset($vcard['fn']);
 726                         }
 727                         if(! (x($vcard,'fn')))
 728                                 $vcard['fn'] = notags($feed->get_title());
 729                         if(! (x($vcard,'fn')))
 730                                 $vcard['fn'] = notags($feed->get_description());
 731
 732                         if(strpos($vcard['fn'],'Twitter / ') !== false) {
 733                                 $vcard['fn'] = substr($vcard['fn'],strpos($vcard['fn'],'/')+1);
 734                                 $vcard['fn'] = trim($vcard['fn']);
 735                         }
 736                         if(! x($vcard,'nick')) {
 737                                 $vcard['nick'] = strtolower(notags(unxmlify($vcard['fn'])));
 738                                 if(strpos($vcard['nick'],' '))
 739                                         $vcard['nick'] = trim(substr($vcard['nick'],0,strpos($vcard['nick'],' ')));
 740                         }
 741                         if(! $priority)
 742                                 $priority = 2;
 743                 }
 744         }
 745
 746         if(! x($vcard,'photo')) {
 747                 $a = get_app();
 748                 $vcard['photo'] = $a->get_baseurl() . '/images/person-175.jpg' ;
 749         }
 750
 751         if(! $profile)
 752                 $profile = $url;
 753
 754         // No human could be associated with this link, use the URL as the contact name
 755
 756         if(($network === NETWORK_FEED) && ($poll) && (! x($vcard,'fn')))
 757                 $vcard['fn'] = $url;
 758
 759         if (($notify != "") AND ($poll != "")) {
 760                 $baseurl = matching($notify, $poll);
 761
 762                 $baseurl2 = matching($baseurl, $profile);
 763                 if ($baseurl2 != "")
 764                         $baseurl = $baseurl2;
 765         }
 766
 767         if (($baseurl == "") AND ($notify != ""))
 768                 $baseurl = matching($profile, $notify);
 769
 770         if (($baseurl == "") AND ($poll != ""))
 771                 $baseurl = matching($profile, $poll);
 772
 773         $baseurl = rtrim($baseurl, "/");
 774
 775         $vcard['fn'] = notags($vcard['fn']);
 776         $vcard['nick'] = str_replace(' ','',notags($vcard['nick']));
 777
 778         $result['name'] = $vcard['fn'];
 779         $result['nick'] = $vcard['nick'];
 780         $result['url'] = $profile;
 781         $result['addr'] = $addr;
 782         $result['batch'] = $batch;
 783         $result['notify'] = $notify;
 784         $result['poll'] = $poll;
 785         $result['request'] = $request;
 786         $result['confirm'] = $confirm;
 787         $result['poco'] = $poco;
 788         $result['photo'] = $vcard['photo'];
 789         $result['priority'] = $priority;
 790         $result['network'] = $network;
 791         $result['alias'] = $alias;
 792         $result['pubkey'] = $pubkey;
 793         $result['baseurl'] = $baseurl;
 794
 795         logger('probe_url: ' . print_r($result,true), LOGGER_DEBUG);
 796
 797         // Trying if it maybe a diaspora account
 798         if (($result['network'] == NETWORK_FEED) OR ($result['addr'] == "")) {
 799                 require_once('include/bbcode.php');
 800                 $address = GetProfileUsername($url, "", true);
 801                 $result2 = probe_url($address, $mode);
 802                 if ($result2['network'] != "")
 803                         $result = $result2;
 804         }
 805
 806         Cache::set("probe_url:".$mode.":".$url,serialize($result));
 807
 808         return $result;
 809 }
 810
 811 function matching($part1, $part2) {
 812         $len = min(strlen($part1), strlen($part2));
 813
 814         $match = "";
 815         $matching = true;
 816         $i = 0;
 817         while (($i <= $len) AND $matching) {
 818                 if (substr($part1, $i, 1) == substr($part2, $i, 1))
 819                         $match .= substr($part1, $i, 1);
 820                 else
 821                         $matching = false;
 822
 823                 $i++;
 824         }
 825         return($match);
 826 }