xref: /dokuwiki/feed.php (revision 9e1bc3f3dd03f19063d530e7aa5eb8eb9b36abf4) 
1<?php
2/**
3 * XML feed export
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 *
8 * @global array $conf
9 * @global Input $INPUT
10 */
11
12if(!defined('DOKU_INC')) define('DOKU_INC', dirname(__FILE__).'/');
13require_once(DOKU_INC.'inc/init.php');
14
15//close session
16session_write_close();
17
18//feed disabled?
19if(!actionOK('rss')) {
20    http_status(404);
21    echo '<error>RSS feed is disabled.</error>';
22    exit;
23}
24
25// get params
26$opt = rss_parseOptions();
27
28// the feed is dynamic - we need a cache for each combo
29// (but most people just use the default feed so it's still effective)
30$key   = join('', array_values($opt)).'$'.$_SERVER['REMOTE_USER'].'$'.$_SERVER['HTTP_HOST'].$_SERVER['SERVER_PORT'];
31$cache = new cache($key, '.feed');
32
33// prepare cache depends
34$depends['files'] = getConfigFiles('main');
35$depends['age']   = $conf['rss_update'];
36$depends['purge'] = $INPUT->bool('purge');
37
38// check cacheage and deliver if nothing has changed since last
39// time or the update interval has not passed, also handles conditional requests
40header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
41header('Pragma: public');
42header('Content-Type: application/xml; charset=utf-8');
43header('X-Robots-Tag: noindex');
44if($cache->useCache($depends)) {
45    http_conditionalRequest($cache->_time);
46    if($conf['allowdebug']) header("X-CacheUsed: $cache->cache");
47    print $cache->retrieveCache();
48    exit;
49} else {
50    http_conditionalRequest(time());
51}
52
53// create new feed
54$rss                 = new DokuWikiFeedCreator();
55$rss->title          = $conf['title'].(($opt['namespace']) ? ' '.$opt['namespace'] : '');
56$rss->link           = DOKU_URL;
57$rss->syndicationURL = DOKU_URL.'feed.php';
58$rss->cssStyleSheet  = DOKU_URL.'lib/exe/css.php?s=feed';
59
60$image        = new FeedImage();
61$image->title = $conf['title'];
62$image->url   = tpl_getMediaFile(array(':wiki:favicon.ico', ':favicon.ico', 'images/favicon.ico'), true);
63$image->link  = DOKU_URL;
64$rss->image   = $image;
65
66$data  = null;
67$modes = array(
68    'list'   => 'rssListNamespace',
69    'search' => 'rssSearch',
70    'recent' => 'rssRecentChanges'
71);
72if(isset($modes[$opt['feed_mode']])) {
73    $data = $modes[$opt['feed_mode']]($opt);
74} else {
75    $eventData = array(
76        'opt'  => &$opt,
77        'data' => &$data,
78    );
79    $event     = new Doku_Event('FEED_MODE_UNKNOWN', $eventData);
80    if($event->advise_before(true)) {
81        echo sprintf('<error>Unknown feed mode %s</error>', hsc($opt['feed_mode']));
82        exit;
83    }
84    $event->advise_after();
85}
86
87rss_buildItems($rss, $data, $opt);
88$feed = $rss->createFeed($opt['feed_type'], 'utf-8');
89
90// save cachefile
91$cache->storeCache($feed);
92
93// finally deliver
94print $feed;
95
96// ---------------------------------------------------------------- //
97
98/**
99 * Get URL parameters and config options and return an initialized option array
100 *
101 * @author Andreas Gohr <andi@splitbrain.org>
102 */
103function rss_parseOptions() {
104    global $conf;
105    global $INPUT;
106
107    $opt = array();
108
109    foreach(array(
110                // Basic feed properties
111                // Plugins may probably want to add new values to these
112                // properties for implementing own feeds
113
114                // One of: list, search, recent
115                'feed_mode'    => array('str', 'mode', 'recent'),
116                // One of: diff, page, rev, current
117                'link_to'      => array('str', 'linkto', $conf['rss_linkto']),
118                // One of: abstract, diff, htmldiff, html
119                'item_content' => array('str', 'content', $conf['rss_content']),
120
121                // Special feed properties
122                // These are only used by certain feed_modes
123
124                // String, used for feed title, in list and rc mode
125                'namespace'    => array('str', 'ns', null),
126                // Positive integer, only used in rc mode
127                'items'        => array('int', 'num', $conf['recent']),
128                // Boolean, only used in rc mode
129                'show_minor'   => array('bool', 'minor', false),
130                // String, only used in search mode
131                'search_query' => array('str', 'q', null),
132                // One of: pages, media, both
133                'content_type' => array('str', 'view', $conf['rss_media'])
134
135            ) as $name => $val) {
136        $opt[$name] = $INPUT->$val[0]($val[1], $val[2], true);
137    }
138
139    $opt['items']      = max(0, (int) $opt['items']);
140    $opt['show_minor'] = (bool) $opt['show_minor'];
141
142    $opt['guardmail'] = ($conf['mailguard'] != '' && $conf['mailguard'] != 'none');
143
144    $type = $INPUT->valid(
145        'type',
146        array( 'rss', 'rss2', 'atom', 'atom1', 'rss1'),
147        $conf['rss_type']
148    );
149    switch($type) {
150        case 'rss':
151            $opt['feed_type'] = 'RSS0.91';
152            $opt['mime_type'] = 'text/xml';
153            break;
154        case 'rss2':
155            $opt['feed_type'] = 'RSS2.0';
156            $opt['mime_type'] = 'text/xml';
157            break;
158        case 'atom':
159            $opt['feed_type'] = 'ATOM0.3';
160            $opt['mime_type'] = 'application/xml';
161            break;
162        case 'atom1':
163            $opt['feed_type'] = 'ATOM1.0';
164            $opt['mime_type'] = 'application/atom+xml';
165            break;
166        default:
167            $opt['feed_type'] = 'RSS1.0';
168            $opt['mime_type'] = 'application/xml';
169    }
170
171    $eventData = array(
172        'opt' => &$opt,
173    );
174    trigger_event('FEED_OPTS_POSTPROCESS', $eventData);
175    return $opt;
176}
177
178/**
179 * Add recent changed pages to a feed object
180 *
181 * @author Andreas Gohr <andi@splitbrain.org>
182 * @param  FeedCreator $rss the FeedCreator Object
183 * @param  array       $data the items to add
184 * @param  array       $opt  the feed options
185 */
186function rss_buildItems(&$rss, &$data, $opt) {
187    global $conf;
188    global $lang;
189    /* @var DokuWiki_Auth_Plugin $auth */
190    global $auth;
191
192    $eventData = array(
193        'rss'  => &$rss,
194        'data' => &$data,
195        'opt'  => &$opt,
196    );
197    $event     = new Doku_Event('FEED_DATA_PROCESS', $eventData);
198    if($event->advise_before(false)) {
199        foreach($data as $ditem) {
200            if(!is_array($ditem)) {
201                // not an array? then only a list of IDs was given
202                $ditem = array('id' => $ditem);
203            }
204
205            $item = new FeedItem();
206            $id   = $ditem['id'];
207            if(!$ditem['media']) {
208                $meta = p_get_metadata($id);
209            } else {
210                $meta = array();
211            }
212
213            // add date
214            if($ditem['date']) {
215                $date = $ditem['date'];
216            } elseif ($ditem['media']) {
217                $date = @filemtime(mediaFN($id));
218            } elseif (@file_exists(wikiFN($id))) {
219                $date = @filemtime(wikiFN($id));
220            } elseif($meta['date']['modified']) {
221                $date = $meta['date']['modified'];
222            } else {
223                $date = 0;
224            }
225            if($date) $item->date = date('r', $date);
226
227            // add title
228            if($conf['useheading'] && $meta['title']) {
229                $item->title = $meta['title'];
230            } else {
231                $item->title = $ditem['id'];
232            }
233            if($conf['rss_show_summary'] && !empty($ditem['sum'])) {
234                $item->title .= ' - '.strip_tags($ditem['sum']);
235            }
236
237            // add item link
238            switch($opt['link_to']) {
239                case 'page':
240                    if($ditem['media']) {
241                        $item->link = media_managerURL(
242                            array(
243                                 'image' => $id,
244                                 'ns'    => getNS($id),
245                                 'rev'   => $date
246                            ), '&', true
247                        );
248                    } else {
249                        $item->link = wl($id, 'rev='.$date, true, '&');
250                    }
251                    break;
252                case 'rev':
253                    if($ditem['media']) {
254                        $item->link = media_managerURL(
255                            array(
256                                 'image'       => $id,
257                                 'ns'          => getNS($id),
258                                 'rev'         => $date,
259                                 'tab_details' => 'history'
260                            ), '&', true
261                        );
262                    } else {
263                        $item->link = wl($id, 'do=revisions&rev='.$date, true, '&');
264                    }
265                    break;
266                case 'current':
267                    if($ditem['media']) {
268                        $item->link = media_managerURL(
269                            array(
270                                 'image' => $id,
271                                 'ns'    => getNS($id)
272                            ), '&', true
273                        );
274                    } else {
275                        $item->link = wl($id, '', true, '&');
276                    }
277                    break;
278                case 'diff':
279                default:
280                    if($ditem['media']) {
281                        $item->link = media_managerURL(
282                            array(
283                                 'image'       => $id,
284                                 'ns'          => getNS($id),
285                                 'rev'         => $date,
286                                 'tab_details' => 'history',
287                                 'mediado'     => 'diff'
288                            ), '&', true
289                        );
290                    } else {
291                        $item->link = wl($id, 'rev='.$date.'&do=diff', true, '&');
292                    }
293            }
294
295            // add item content
296            switch($opt['item_content']) {
297                case 'diff':
298                case 'htmldiff':
299                    if($ditem['media']) {
300                        $medialog = new MediaChangeLog($id);
301                        $revs  = $medialog->getRevisions(0, 1);
302                        $rev   = $revs[0];
303                        $src_r = '';
304                        $src_l = '';
305
306                        if($size = media_image_preview_size($id, false, new JpegMeta(mediaFN($id)), 300)) {
307                            $more  = 'w='.$size[0].'&h='.$size[1].'&t='.@filemtime(mediaFN($id));
308                            $src_r = ml($id, $more, true, '&amp;', true);
309                        }
310                        if($rev && $size = media_image_preview_size($id, $rev, new JpegMeta(mediaFN($id, $rev)), 300)) {
311                            $more  = 'rev='.$rev.'&w='.$size[0].'&h='.$size[1];
312                            $src_l = ml($id, $more, true, '&amp;', true);
313                        }
314                        $content = '';
315                        if($src_r) {
316                            $content = '<table>';
317                            $content .= '<tr><th width="50%">'.$rev.'</th>';
318                            $content .= '<th width="50%">'.$lang['current'].'</th></tr>';
319                            $content .= '<tr align="center"><td><img src="'.$src_l.'" alt="" /></td><td>';
320                            $content .= '<img src="'.$src_r.'" alt="'.$id.'" /></td></tr>';
321                            $content .= '</table>';
322                        }
323
324                    } else {
325                        require_once(DOKU_INC.'inc/DifferenceEngine.php');
326                        $pagelog = new PageChangeLog($id);
327                        $revs = $pagelog->getRevisions(0, 1);
328                        $rev  = $revs[0];
329
330                        if($rev) {
331                            $df = new Diff(explode("\n", rawWiki($id, $rev)),
332                                           explode("\n", rawWiki($id, '')));
333                        } else {
334                            $df = new Diff(array(''),
335                                           explode("\n", rawWiki($id, '')));
336                        }
337
338                        if($opt['item_content'] == 'htmldiff') {
339                            // note: no need to escape diff output, TableDiffFormatter provides 'safe' html
340                            $tdf     = new TableDiffFormatter();
341                            $content = '<table>';
342                            $content .= '<tr><th colspan="2" width="50%">'.$rev.'</th>';
343                            $content .= '<th colspan="2" width="50%">'.$lang['current'].'</th></tr>';
344                            $content .= $tdf->format($df);
345                            $content .= '</table>';
346                        } else {
347                            // note: diff output must be escaped, UnifiedDiffFormatter provides plain text
348                            $udf     = new UnifiedDiffFormatter();
349                            $content = "<pre>\n".hsc($udf->format($df))."\n</pre>";
350                        }
351                    }
352                    break;
353                case 'html':
354                    if($ditem['media']) {
355                        if($size = media_image_preview_size($id, false, new JpegMeta(mediaFN($id)))) {
356                            $more    = 'w='.$size[0].'&h='.$size[1].'&t='.@filemtime(mediaFN($id));
357                            $src     = ml($id, $more, true, '&amp;', true);
358                            $content = '<img src="'.$src.'" alt="'.$id.'" />';
359                        } else {
360                            $content = '';
361                        }
362                    } else {
363                        if (@filemtime(wikiFN($id)) === $date) {
364                            $content = p_wiki_xhtml($id, '', false);
365                        } else {
366                            $content = p_wiki_xhtml($id, $date, false);
367                        }
368                        // no TOC in feeds
369                        $content = preg_replace('/(<!-- TOC START -->).*(<!-- TOC END -->)/s', '', $content);
370
371                        // add alignment for images
372                        $content = preg_replace('/(<img .*?class="medialeft")/s', '\\1 align="left"', $content);
373                        $content = preg_replace('/(<img .*?class="mediaright")/s', '\\1 align="right"', $content);
374
375                        // make URLs work when canonical is not set, regexp instead of rerendering!
376                        if(!$conf['canonical']) {
377                            $base    = preg_quote(DOKU_REL, '/');
378                            $content = preg_replace('/(<a href|<img src)="('.$base.')/s', '$1="'.DOKU_URL, $content);
379                        }
380                    }
381
382                    break;
383                case 'abstract':
384                default:
385                    if($ditem['media']) {
386                        if($size = media_image_preview_size($id, false, 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                        $content = $meta['description']['abstract'];
395                    }
396            }
397            $item->description = $content; //FIXME a plugin hook here could be senseful
398
399            // add user
400            # FIXME should the user be pulled from metadata as well?
401            $user         = @$ditem['user']; // the @ spares time repeating lookup
402            $item->author = '';
403            if($user && $conf['useacl'] && $auth) {
404                $userInfo = $auth->getUserData($user);
405                if($userInfo) {
406                    switch($conf['showuseras']) {
407                        case 'username':
408                            $item->author = $userInfo['name'];
409                            break;
410                        default:
411                            $item->author = $user;
412                            break;
413                    }
414                } else {
415                    $item->author = $user;
416                }
417                if($userInfo && !$opt['guardmail']) {
418                    $item->authorEmail = $userInfo['mail'];
419                } else {
420                    //cannot obfuscate because some RSS readers may check validity
421                    $item->authorEmail = $user.'@'.$ditem['ip'];
422                }
423            } elseif($user) {
424                // this happens when no ACL but some Apache auth is used
425                $item->author      = $user;
426                $item->authorEmail = $user.'@'.$ditem['ip'];
427            } else {
428                $item->authorEmail = 'anonymous@'.$ditem['ip'];
429            }
430
431            // add category
432            if(isset($meta['subject'])) {
433                $item->category = $meta['subject'];
434            } else {
435                $cat = getNS($id);
436                if($cat) $item->category = $cat;
437            }
438
439            // finally add the item to the feed object, after handing it to registered plugins
440            $evdata = array(
441                'item'  => &$item,
442                'opt'   => &$opt,
443                'ditem' => &$ditem,
444                'rss'   => &$rss
445            );
446            $evt    = new Doku_Event('FEED_ITEM_ADD', $evdata);
447            if($evt->advise_before()) {
448                $rss->addItem($item);
449            }
450            $evt->advise_after(); // for completeness
451        }
452    }
453    $event->advise_after();
454}
455
456/**
457 * Add recent changed pages to the feed object
458 *
459 * @author Andreas Gohr <andi@splitbrain.org>
460 */
461function rssRecentChanges($opt) {
462    global $conf;
463    $flags = RECENTS_SKIP_DELETED;
464    if(!$opt['show_minor']) $flags += RECENTS_SKIP_MINORS;
465    if($opt['content_type'] == 'media' && $conf['mediarevisions']) $flags += RECENTS_MEDIA_CHANGES;
466    if($opt['content_type'] == 'both' && $conf['mediarevisions']) $flags += RECENTS_MEDIA_PAGES_MIXED;
467
468    $recents = getRecents(0, $opt['items'], $opt['namespace'], $flags);
469    return $recents;
470}
471
472/**
473 * Add all pages of a namespace to the feed object
474 *
475 * @author Andreas Gohr <andi@splitbrain.org>
476 */
477function rssListNamespace($opt) {
478    require_once(DOKU_INC.'inc/search.php');
479    global $conf;
480
481    $ns = ':'.cleanID($opt['namespace']);
482    $ns = str_replace(':', '/', $ns);
483
484    $data = array();
485    $search_opts = array(
486        'depth' => 1,
487        'pagesonly' => true,
488        'listfiles' => true
489    );
490    search($data, $conf['datadir'], 'search_universal', $search_opts, $ns);
491
492    return $data;
493}
494
495/**
496 * Add the result of a full text search to the feed object
497 *
498 * @author Andreas Gohr <andi@splitbrain.org>
499 */
500function rssSearch($opt) {
501    if(!$opt['search_query']) return array();
502
503    require_once(DOKU_INC.'inc/fulltext.php');
504    $data = ft_pageSearch($opt['search_query'], $poswords);
505    $data = array_keys($data);
506
507    return $data;
508}
509
510//Setup VIM: ex: et ts=4 :
511