feed.php

   1 <?php
   2
   3 /**
   4  * XML feed export
   5  *
   6  * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
   7  * @author     Andreas Gohr <andi@splitbrain.org>
   8  *
   9  * @global array $conf
  10  * @global Input $INPUT
  11  */
  12
  13 use dokuwiki\Cache\Cache;
  14 use dokuwiki\ChangeLog\MediaChangeLog;
  15 use dokuwiki\ChangeLog\PageChangeLog;
  16 use dokuwiki\Extension\AuthPlugin;
  17 use dokuwiki\Extension\Event;
  18
  19 if (!defined('DOKU_INC')) define('DOKU_INC', __DIR__ . '/');
  20 require_once(DOKU_INC . 'inc/init.php');
  21
  22 //close session
  23 session_write_close();
  24
  25 //feed disabled?
  26 if (!actionOK('rss')) {
  27     http_status(404);
  28     echo '<error>RSS feed is disabled.</error>';
  29     exit;
  30 }
  31
  32 // get params
  33 $opt = rss_parseOptions();
  34
  35 // the feed is dynamic - we need a cache for each combo
  36 // (but most people just use the default feed so it's still effective)
  37 $key   = implode('', array_values($opt)) . '$' . $INPUT->server->str('REMOTE_USER')
  38     . '$' . $INPUT->server->str('HTTP_HOST') . $INPUT->server->str('SERVER_PORT');
  39 $cache = new Cache($key, '.feed');
  40
  41 // prepare cache depends
  42 $depends['files'] = getConfigFiles('main');
  43 $depends['age']   = $conf['rss_update'];
  44 $depends['purge'] = $INPUT->bool('purge');
  45
  46 // check cacheage and deliver if nothing has changed since last
  47 // time or the update interval has not passed, also handles conditional requests
  48 header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
  49 header('Pragma: public');
  50 header('Content-Type: application/xml; charset=utf-8');
  51 header('X-Robots-Tag: noindex');
  52 if ($cache->useCache($depends)) {
  53     http_conditionalRequest($cache->getTime());
  54     if ($conf['allowdebug']) header("X-CacheUsed: $cache->cache");
  55     print $cache->retrieveCache();
  56     exit;
  57 } else {
  58     http_conditionalRequest(time());
  59 }
  60
  61 // create new feed
  62 $rss                 = new UniversalFeedCreator();
  63 $rss->title          = $conf['title'] . (($opt['namespace']) ? ' ' . $opt['namespace'] : '');
  64 $rss->link           = DOKU_URL;
  65 $rss->syndicationURL = DOKU_URL . 'feed.php';
  66 $rss->cssStyleSheet  = DOKU_URL . 'lib/exe/css.php?s=feed';
  67
  68 $image        = new FeedImage();
  69 $image->title = $conf['title'];
  70 $image->url   = tpl_getMediaFile([':wiki:favicon.ico', ':favicon.ico', 'images/favicon.ico'], true);
  71 $image->link  = DOKU_URL;
  72 $rss->image   = $image;
  73
  74 $data  = null;
  75 $modes = [
  76     'list'   => 'rssListNamespace',
  77     'search' => 'rssSearch',
  78     'recent' => 'rssRecentChanges'
  79 ];
  80
  81 if (isset($modes[$opt['feed_mode']])) {
  82     $data = $modes[$opt['feed_mode']]($opt);
  83 } else {
  84     $eventData = [
  85         'opt'  => &$opt,
  86         'data' => &$data,
  87     ];
  88     $event     = new Event('FEED_MODE_UNKNOWN', $eventData);
  89     if ($event->advise_before(true)) {
  90         echo sprintf('<error>Unknown feed mode %s</error>', hsc($opt['feed_mode']));
  91         exit;
  92     }
  93     $event->advise_after();
  94 }
  95
  96 rss_buildItems($rss, $data, $opt);
  97 $feed = $rss->createFeed($opt['feed_type']);
  98
  99 // save cachefile
 100 $cache->storeCache($feed);
 101
 102 // finally deliver
 103 print $feed;
 104
 105 // ---------------------------------------------------------------- //
 106
 107 /**
 108  * Get URL parameters and config options and return an initialized option array
 109  *
 110  * @author Andreas Gohr <andi@splitbrain.org>
 111  */
 112 function rss_parseOptions()
 113 {
 114     global $conf;
 115     global $INPUT;
 116
 117     $opt = [];
 118
 119     foreach (
 120         [
 121             // Basic feed properties
 122             // Plugins may probably want to add new values to these
 123             // properties for implementing own feeds
 124
 125             // One of: list, search, recent
 126             'feed_mode'    => ['str', 'mode', 'recent'],
 127             // One of: diff, page, rev, current
 128             'link_to'      => ['str', 'linkto', $conf['rss_linkto']],
 129             // One of: abstract, diff, htmldiff, html
 130             'item_content' => ['str', 'content', $conf['rss_content']],
 131
 132             // Special feed properties
 133             // These are only used by certain feed_modes
 134
 135             // String, used for feed title, in list and rc mode
 136             'namespace'    => ['str', 'ns', null],
 137             // Positive integer, only used in rc mode
 138             'items'        => ['int', 'num', $conf['recent']],
 139             // Boolean, only used in rc mode
 140             'show_minor'   => ['bool', 'minor', false],
 141             // Boolean, only used in rc mode
 142             'only_new'     => ['bool', 'onlynewpages', false],
 143             // String, only used in list mode
 144             'sort'         => ['str', 'sort', 'natural'],
 145             // String, only used in search mode
 146             'search_query' => ['str', 'q', null],
 147             // One of: pages, media, both
 148             'content_type' => ['str', 'view', $conf['rss_media']]
 149
 150         ] as $name => $val
 151     ) {
 152         $opt[$name] = $INPUT->{$val[0]}($val[1], $val[2], true);
 153     }
 154
 155     $opt['items']      = max(0, (int) $opt['items']);
 156     $opt['show_minor'] = (bool) $opt['show_minor'];
 157     $opt['only_new']   = (bool) $opt['only_new'];
 158     $opt['sort']       = valid_input_set('sort', ['default' => 'natural', 'date'], $opt);
 159
 160     $opt['guardmail'] = ($conf['mailguard'] != '' && $conf['mailguard'] != 'none');
 161
 162     $type = $INPUT->valid(
 163         'type',
 164         ['rss', 'rss2', 'atom', 'atom1', 'rss1'],
 165         $conf['rss_type']
 166     );
 167     switch ($type) {
 168         case 'rss':
 169             $opt['feed_type'] = 'RSS0.91';
 170             $opt['mime_type'] = 'text/xml';
 171             break;
 172         case 'rss2':
 173             $opt['feed_type'] = 'RSS2.0';
 174             $opt['mime_type'] = 'text/xml';
 175             break;
 176         case 'atom':
 177             $opt['feed_type'] = 'ATOM0.3';
 178             $opt['mime_type'] = 'application/xml';
 179             break;
 180         case 'atom1':
 181             $opt['feed_type'] = 'ATOM1.0';
 182             $opt['mime_type'] = 'application/atom+xml';
 183             break;
 184         default:
 185             $opt['feed_type'] = 'RSS1.0';
 186             $opt['mime_type'] = 'application/xml';
 187     }
 188
 189     $eventData = [
 190         'opt' => &$opt,
 191     ];
 192     Event::createAndTrigger('FEED_OPTS_POSTPROCESS', $eventData);
 193     return $opt;
 194 }
 195
 196 /**
 197  * Add recent changed pages to a feed object
 198  *
 199  * @param FeedCreator $rss  the FeedCreator Object
 200  * @param array       $data the items to add
 201  * @param array       $opt  the feed options
 202  * @author Andreas Gohr <andi@splitbrain.org>
 203  */
 204 function rss_buildItems(&$rss, &$data, $opt)
 205 {
 206     global $conf;
 207     global $lang;
 208     /* @var AuthPlugin $auth */
 209     global $auth;
 210
 211     $eventData = [
 212         'rss'  => &$rss,
 213         'data' => &$data,
 214         'opt'  => &$opt,
 215     ];
 216     $event     = new Event('FEED_DATA_PROCESS', $eventData);
 217     if ($event->advise_before(false)) {
 218         foreach ($data as $ditem) {
 219             if (!is_array($ditem)) {
 220                 // not an array? then only a list of IDs was given
 221                 $ditem = ['id' => $ditem];
 222             }
 223
 224             $item = new FeedItem();
 225             $id   = $ditem['id'];
 226             if (empty($ditem['media'])) {
 227                 $meta = p_get_metadata($id);
 228             } else {
 229                 $meta = [];
 230             }
 231
 232             // add date
 233             if (isset($ditem['date'])) {
 234                 $date = $ditem['date'];
 235             } elseif ($ditem['media']) {
 236                 $date = @filemtime(mediaFN($id));
 237             } elseif (file_exists(wikiFN($id))) {
 238                 $date = @filemtime(wikiFN($id));
 239             } elseif ($meta['date']['modified']) {
 240                 $date = $meta['date']['modified'];
 241             } else {
 242                 $date = 0;
 243             }
 244             if ($date) $item->date = date('r', $date);
 245
 246             // add title
 247             if ($conf['useheading'] && $meta['title'] ?? '') {
 248                 $item->title = $meta['title'];
 249             } else {
 250                 $item->title = $ditem['id'];
 251             }
 252             if ($conf['rss_show_summary'] && !empty($ditem['sum'])) {
 253                 $item->title .= ' - ' . strip_tags($ditem['sum']);
 254             }
 255
 256             // add item link
 257             switch ($opt['link_to']) {
 258                 case 'page':
 259                     if (isset($ditem['media'])) {
 260                         $item->link = media_managerURL(
 261                             [
 262                                 'image' => $id,
 263                                 'ns'    => getNS($id),
 264                                 'rev'   => $date
 265                             ],
 266                             '&',
 267                             true
 268                         );
 269                     } else {
 270                         $item->link = wl($id, 'rev=' . $date, true, '&');
 271                     }
 272                     break;
 273                 case 'rev':
 274                     if ($ditem['media']) {
 275                         $item->link = media_managerURL(
 276                             [
 277                                 'image'       => $id,
 278                                 'ns'          => getNS($id),
 279                                 'rev'         => $date,
 280                                 'tab_details' => 'history'
 281                             ],
 282                             '&',
 283                             true
 284                         );
 285                     } else {
 286                         $item->link = wl($id, 'do=revisions&rev=' . $date, true, '&');
 287                     }
 288                     break;
 289                 case 'current':
 290                     if ($ditem['media']) {
 291                         $item->link = media_managerURL(
 292                             [
 293                                 'image' => $id,
 294                                 'ns'    => getNS($id)
 295                             ],
 296                             '&',
 297                             true
 298                         );
 299                     } else {
 300                         $item->link = wl($id, '', true, '&');
 301                     }
 302                     break;
 303                 case 'diff':
 304                 default:
 305                     if ($ditem['media']) {
 306                         $item->link = media_managerURL(
 307                             [
 308                                 'image'       => $id,
 309                                 'ns'          => getNS($id),
 310                                 'rev'         => $date,
 311                                 'tab_details' => 'history',
 312                                 'mediado'     => 'diff'
 313                             ],
 314                             '&',
 315                             true
 316                         );
 317                     } else {
 318                         $item->link = wl($id, 'rev=' . $date . '&do=diff', true, '&');
 319                     }
 320             }
 321
 322             // add item content
 323             switch ($opt['item_content']) {
 324                 case 'diff':
 325                 case 'htmldiff':
 326                     if ($ditem['media']) {
 327                         $medialog = new MediaChangeLog($id);
 328                         $revs     = $medialog->getRevisions(0, 1);
 329                         $rev      = $revs[0];
 330                         $src_r    = '';
 331                         $src_l    = '';
 332
 333                         if ($size = media_image_preview_size($id, '', new JpegMeta(mediaFN($id)), 300)) {
 334                             $more  = 'w=' . $size[0] . '&h=' . $size[1] . '&t=' . @filemtime(mediaFN($id));
 335                             $src_r = ml($id, $more, true, '&amp;', true);
 336                         }
 337                         if ($rev && $size = media_image_preview_size($id, $rev, new JpegMeta(mediaFN($id, $rev)),
 338                                 300)) {
 339                             $more = 'rev=' . $rev . '&w=' . $size[0] . '&h=' . $size[1];
 340                             $src_l = ml($id, $more, true, '&amp;', true);
 341                         }
 342                         $content = '';
 343                         if ($src_r) {
 344                             $content = '<table>';
 345                             $content .= '<tr><th width="50%">' . $rev . '</th>';
 346                             $content .= '<th width="50%">' . $lang['current'] . '</th></tr>';
 347                             $content .= '<tr align="center"><td><img src="' . $src_l . '" alt="" /></td><td>';
 348                             $content .= '<img src="' . $src_r . '" alt="' . $id . '" /></td></tr>';
 349                             $content .= '</table>';
 350                         }
 351                     } else {
 352                         require_once(DOKU_INC . 'inc/DifferenceEngine.php');
 353                         $pagelog = new PageChangeLog($id);
 354                         $revs    = $pagelog->getRevisions(0, 1);
 355                         $rev     = $revs[0];
 356
 357                         if ($rev) {
 358                             $df = new Diff(
 359                                 explode("\n", rawWiki($id, $rev)),
 360                                 explode("\n", rawWiki($id, ''))
 361                             );
 362                         } else {
 363                             $df = new Diff(
 364                                 [''],
 365                                 explode("\n", rawWiki($id, ''))
 366                             );
 367                         }
 368
 369                         if ($opt['item_content'] == 'htmldiff') {
 370                             // note: no need to escape diff output, TableDiffFormatter provides 'safe' html
 371                             $tdf     = new TableDiffFormatter();
 372                             $content = '<table>';
 373                             $content .= '<tr><th colspan="2" width="50%">' . $rev . '</th>';
 374                             $content .= '<th colspan="2" width="50%">' . $lang['current'] . '</th></tr>';
 375                             $content .= $tdf->format($df);
 376                             $content .= '</table>';
 377                         } else {
 378                             // note: diff output must be escaped, UnifiedDiffFormatter provides plain text
 379                             $udf     = new UnifiedDiffFormatter();
 380                             $content = "<pre>\n" . hsc($udf->format($df)) . "\n</pre>";
 381                         }
 382                     }
 383                     break;
 384                 case 'html':
 385                     if ($ditem['media']) {
 386                         if ($size = media_image_preview_size($id, '', new JpegMeta(mediaFN($id)))) {
 387                             $more    = 'w=' . $size[0] . '&h=' . $size[1] . '&t=' . @filemtime(mediaFN($id));
 388                             $src  = ml($id, $more, true, '&amp;', true);
 389                             $content = '<img src="' . $src . '" alt="' . $id . '" />';
 390                         } else {
 391                             $content = '';
 392                         }
 393                     } else {
 394                         if (@filemtime(wikiFN($id)) === $date) {
 395                             $content = p_wiki_xhtml($id, '', false);
 396                         } else {
 397                             $content = p_wiki_xhtml($id, $date, false);
 398                         }
 399                         // no TOC in feeds
 400                         $content = preg_replace('/(<!-- TOC START -->).*(<!-- TOC END -->)/s', '', $content);
 401
 402                         // add alignment for images
 403                         $content = preg_replace('/(<img .*?class="medialeft")/s', '\\1 align="left"', $content);
 404                         $content = preg_replace('/(<img .*?class="mediaright")/s', '\\1 align="right"', $content);
 405
 406                         // make URLs work when canonical is not set, regexp instead of rerendering!
 407                         if (!$conf['canonical']) {
 408                             $base    = preg_quote(DOKU_REL, '/');
 409                             $content = preg_replace(
 410                                 '/(<a href|<img src)="(' . $base . ')/s', '$1="' . DOKU_URL,
 411                                 $content
 412                             );
 413                         }
 414                     }
 415
 416                     break;
 417                 case 'abstract':
 418                 default:
 419                     if (isset($ditem['media'])) {
 420                         if ($size = media_image_preview_size($id, '', new JpegMeta(mediaFN($id)))) {
 421                             $more    = 'w=' . $size[0] . '&h=' . $size[1] . '&t=' . @filemtime(mediaFN($id));
 422                             $src  = ml($id, $more, true, '&amp;', true);
 423                             $content = '<img src="' . $src . '" alt="' . $id . '" />';
 424                         } else {
 425                             $content = '';
 426                         }
 427                     } else {
 428                         $content = $meta['description']['abstract'];
 429                     }
 430             }
 431             $item->description = $content; //FIXME a plugin hook here could be senseful
 432
 433             // add user
 434             # FIXME should the user be pulled from metadata as well?
 435             $user = @$ditem['user']; // the @ spares time repeating lookup
 436             if (blank($user)) {
 437                 $item->author      = 'Anonymous';
 438                 $item->authorEmail = 'anonymous@undisclosed.example.com';
 439             } else {
 440                 $item->author      = $user;
 441                 $item->authorEmail = $user . '@undisclosed.example.com';
 442
 443                 // get real user name if configured
 444                 if ($conf['useacl'] && $auth) {
 445                     $userInfo = $auth->getUserData($user);
 446                     if ($userInfo) {
 447                         switch ($conf['showuseras']) {
 448                             case 'username':
 449                             case 'username_link':
 450                                 $item->author = $userInfo['name'];
 451                                 break;
 452                             default:
 453                                 $item->author = $user;
 454                                 break;
 455                         }
 456                     } else {
 457                         $item->author = $user;
 458                     }
 459                 }
 460             }
 461
 462             // add category
 463             if (isset($meta['subject'])) {
 464                 $item->category = $meta['subject'];
 465             } else {
 466                 $cat = getNS($id);
 467                 if ($cat) $item->category = $cat;
 468             }
 469
 470             // finally add the item to the feed object, after handing it to registered plugins
 471             $evdata = [
 472                 'item'  => &$item,
 473                 'opt'   => &$opt,
 474                 'ditem' => &$ditem,
 475                 'rss'   => &$rss
 476             ];
 477             $evt    = new Event('FEED_ITEM_ADD', $evdata);
 478             if ($evt->advise_before()) {
 479                 $rss->addItem($item);
 480             }
 481             $evt->advise_after(); // for completeness
 482         }
 483     }
 484     $event->advise_after();
 485 }
 486
 487 /**
 488  * Add recent changed pages to the feed object
 489  *
 490  * @author Andreas Gohr <andi@splitbrain.org>
 491  */
 492 function rssRecentChanges($opt)
 493 {
 494     global $conf;
 495     $flags = 0;
 496     if (!$conf['rss_show_deleted']) $flags += RECENTS_SKIP_DELETED;
 497     if (!$opt['show_minor']) $flags += RECENTS_SKIP_MINORS;
 498     if ($opt['only_new']) $flags += RECENTS_ONLY_CREATION;
 499     if ($opt['content_type'] == 'media' && $conf['mediarevisions']) $flags += RECENTS_MEDIA_CHANGES;
 500     if ($opt['content_type'] == 'both' && $conf['mediarevisions']) $flags += RECENTS_MEDIA_PAGES_MIXED;
 501
 502     $recents = getRecents(0, $opt['items'], $opt['namespace'], $flags);
 503     return $recents;
 504 }
 505
 506 /**
 507  * Add all pages of a namespace to the feed object
 508  *
 509  * @author Andreas Gohr <andi@splitbrain.org>
 510  */
 511 function rssListNamespace($opt)
 512 {
 513     require_once(DOKU_INC . 'inc/search.php');
 514     global $conf;
 515
 516     $ns = ':' . cleanID($opt['namespace']);
 517     $ns = utf8_encodeFN(str_replace(':', '/', $ns));
 518
 519     $data        = [];
 520     $search_opts = [
 521         'depth'     => 1,
 522         'pagesonly' => true,
 523         'listfiles' => true
 524     ];
 525     search($data, $conf['datadir'], 'search_universal', $search_opts, $ns, $lvl = 1, $opt['sort']);
 526
 527     return $data;
 528 }
 529
 530 /**
 531  * Add the result of a full text search to the feed object
 532  *
 533  * @author Andreas Gohr <andi@splitbrain.org>
 534  */
 535 function rssSearch($opt)
 536 {
 537     if (!$opt['search_query'] || !actionOK('search')) return [];
 538
 539     require_once(DOKU_INC . 'inc/fulltext.php');
 540     $data = ft_pageSearch($opt['search_query'], $poswords);
 541     $data = array_keys($data);
 542
 543     return $data;
 544 }
 545
 546 //Setup VIM: ex: et ts=4 :