xref: /dokuwiki/lib/exe/indexer.php (revision bf1f3ac4f72c26ff386c08c920dda651d91c6898) 
1<?php
2/**
3 * DokuWiki indexer
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../');
9define('DOKU_DISABLE_GZIP_OUTPUT',1);
10require_once(DOKU_INC.'inc/init.php');
11require_once(DOKU_INC.'inc/auth.php');
12require_once(DOKU_INC.'inc/events.php');
13session_write_close();  //close session
14if(!defined('NL')) define('NL',"\n");
15
16// Version tag used to force rebuild on upgrade
17define('INDEXER_VERSION', 2);
18
19// keep running after browser closes connection
20@ignore_user_abort(true);
21
22// check if user abort worked, if yes send output early
23if(@ignore_user_abort() && !$conf['broken_iua']){
24    sendGIF(); // send gif
25    $defer = false;
26}else{
27    $defer = true;
28}
29
30$ID = cleanID($_REQUEST['id']);
31
32// Catch any possible output (e.g. errors)
33if(!$_REQUEST['debug']) ob_start();
34
35// run one of the jobs
36$tmp = array();
37$evt = new Doku_Event('INDEXER_TASKS_RUN', $tmp);
38if ($evt->advise_before()) {
39  runIndexer() or
40  metaUpdate() or
41  runSitemapper() or
42  runTrimRecentChanges() or
43  runTrimRecentChanges(true) or
44  $evt->advise_after();
45}
46if($defer) sendGIF();
47
48if(!$_REQUEST['debug']) ob_end_clean();
49exit;
50
51// --------------------------------------------------------------------
52
53/**
54 * Trims the recent changes cache (or imports the old changelog) as needed.
55 *
56 * @param media_changes If the media changelog shall be trimmed instead of
57 * the page changelog
58 *
59 * @author Ben Coburn <btcoburn@silicodon.net>
60 */
61function runTrimRecentChanges($media_changes = false) {
62    global $conf;
63
64    $fn = ($media_changes ? $conf['media_changelog'] : $conf['changelog']);
65
66    // Trim the Recent Changes
67    // Trims the recent changes cache to the last $conf['changes_days'] recent
68    // changes or $conf['recent'] items, which ever is larger.
69    // The trimming is only done once a day.
70    if (@file_exists($fn) &&
71        (@filemtime($fn.'.trimmed')+86400)<time() &&
72        !@file_exists($fn.'_tmp')) {
73            @touch($fn.'.trimmed');
74            io_lock($fn);
75            $lines = file($fn);
76            if (count($lines)<=$conf['recent']) {
77                // nothing to trim
78                io_unlock($fn);
79                return false;
80            }
81
82            io_saveFile($fn.'_tmp', '');          // presave tmp as 2nd lock
83            $trim_time = time() - $conf['recent_days']*86400;
84            $out_lines = array();
85
86            for ($i=0; $i<count($lines); $i++) {
87              $log = parseChangelogLine($lines[$i]);
88              if ($log === false) continue;                      // discard junk
89              if ($log['date'] < $trim_time) {
90                $old_lines[$log['date'].".$i"] = $lines[$i];     // keep old lines for now (append .$i to prevent key collisions)
91              } else {
92                $out_lines[$log['date'].".$i"] = $lines[$i];     // definitely keep these lines
93              }
94            }
95
96            if (count($lines)==count($out_lines)) {
97              // nothing to trim
98              @unlink($fn.'_tmp');
99              io_unlock($fn);
100              return false;
101            }
102
103            // sort the final result, it shouldn't be necessary,
104            //   however the extra robustness in making the changelog cache self-correcting is worth it
105            ksort($out_lines);
106            $extra = $conf['recent'] - count($out_lines);        // do we need extra lines do bring us up to minimum
107            if ($extra > 0) {
108              ksort($old_lines);
109              $out_lines = array_merge(array_slice($old_lines,-$extra),$out_lines);
110            }
111
112            // save trimmed changelog
113            io_saveFile($fn.'_tmp', implode('', $out_lines));
114            @unlink($fn);
115            if (!rename($fn.'_tmp', $fn)) {
116                // rename failed so try another way...
117                io_unlock($fn);
118                io_saveFile($fn, implode('', $out_lines));
119                @unlink($fn.'_tmp');
120            } else {
121                io_unlock($fn);
122            }
123            return true;
124    }
125
126    // nothing done
127    return false;
128}
129
130/**
131 * Runs the indexer for the current page
132 *
133 * @author Andreas Gohr <andi@splitbrain.org>
134 */
135function runIndexer(){
136    global $ID;
137    global $conf;
138    print "runIndexer(): started".NL;
139
140    // Move index files (if needed)
141    // Uses the importoldindex plugin to upgrade the index automatically.
142    // FIXME: Remove this from runIndexer when it is no longer needed.
143    if (@file_exists($conf['cachedir'].'/page.idx') &&
144        (!@file_exists($conf['indexdir'].'/page.idx') ||
145         !filesize($conf['indexdir'].'/page.idx'))  &&
146        !@file_exists($conf['indexdir'].'/index_importing')) {
147        echo "trigger TEMPORARY_INDEX_UPGRADE_EVENT\n";
148        $tmp = array(); // no event data
149        trigger_event('TEMPORARY_INDEX_UPGRADE_EVENT', $tmp);
150    }
151
152    if(!$ID) return false;
153
154    // check if indexing needed
155    $idxtag = metaFN($ID,'.indexed');
156    if(@file_exists($idxtag)){
157        if(io_readFile($idxtag) >= INDEXER_VERSION){
158            $last = @filemtime($idxtag);
159            if($last > @filemtime(wikiFN($ID))){
160                print "runIndexer(): index for $ID up to date".NL;
161                return false;
162            }
163        }
164    }
165
166    // try to aquire a lock
167    $lock = $conf['lockdir'].'/_indexer.lock';
168    while(!@mkdir($lock,$conf['dmode'])){
169        usleep(50);
170        if(time()-@filemtime($lock) > 60*5){
171            // looks like a stale lock - remove it
172            @rmdir($lock);
173            print "runIndexer(): stale lock removed".NL;
174        }else{
175            print "runIndexer(): indexer locked".NL;
176            return false;
177        }
178    }
179    if($conf['dperm']) chmod($lock, $conf['dperm']);
180
181    require_once(DOKU_INC.'inc/indexer.php');
182
183    // upgrade to version 2
184    if (!@file_exists($conf['indexdir'].'/pageword.idx'))
185        idx_upgradePageWords();
186
187    // do the work
188    idx_addPage($ID);
189
190    // we're finished - save and free lock
191    io_saveFile(metaFN($ID,'.indexed'),INDEXER_VERSION);
192    @rmdir($lock);
193    print "runIndexer(): finished".NL;
194    return true;
195}
196
197/**
198 * Will render the metadata for the page if not exists yet
199 *
200 * This makes sure pages which are created from outside DokuWiki will
201 * gain their data when viewed for the first time.
202 */
203function metaUpdate(){
204    global $ID;
205    print "metaUpdate(): started".NL;
206
207    if(!$ID) return false;
208    $file = metaFN($ID, '.meta');
209    echo "meta file: $file".NL;
210
211    // rendering needed?
212    if (@file_exists($file)) return false;
213    if (!@file_exists(wikiFN($ID))) return false;
214
215    require_once(DOKU_INC.'inc/common.php');
216    require_once(DOKU_INC.'inc/parserutils.php');
217    global $conf;
218
219
220    // gather some additional info from changelog
221    $info = io_grep($conf['changelog'],
222                    '/^(\d+)\t(\d+\.\d+\.\d+\.\d+)\t'.preg_quote($ID,'/').'\t([^\t]+)\t([^\t\n]+)/',
223                    0,true);
224
225    $meta = array();
226    if(!empty($info)){
227        $meta['date']['created'] = $info[0][1];
228        foreach($info as $item){
229            if($item[4] != '*'){
230                $meta['date']['modified'] = $item[1];
231                if($item[3]){
232                    $meta['contributor'][$item[3]] = $item[3];
233                }
234            }
235        }
236    }
237
238    $meta = p_render_metadata($ID, $meta);
239    io_saveFile($file, serialize($meta));
240
241    echo "metaUpdate(): finished".NL;
242    return true;
243}
244
245/**
246 * Builds a Google Sitemap of all public pages known to the indexer
247 *
248 * The map is placed in the root directory named sitemap.xml.gz - This
249 * file needs to be writable!
250 *
251 * @author Andreas Gohr
252 * @link   https://www.google.com/webmasters/sitemaps/docs/en/about.html
253 */
254function runSitemapper(){
255    global $conf;
256    print "runSitemapper(): started".NL;
257    if(!$conf['sitemap']) return false;
258
259    if($conf['compression'] == 'bz2' || $conf['compression'] == 'gz'){
260        $sitemap = 'sitemap.xml.gz';
261    }else{
262        $sitemap = 'sitemap.xml';
263    }
264    print "runSitemapper(): using $sitemap".NL;
265
266    if(@file_exists(DOKU_INC.$sitemap)){
267        if(!is_writable(DOKU_INC.$sitemap)) return false;
268    }else{
269        if(!is_writable(DOKU_INC)) return false;
270    }
271
272    if(@filesize(DOKU_INC.$sitemap) &&
273       @filemtime(DOKU_INC.$sitemap) > (time()-($conf['sitemap']*60*60*24))){
274       print 'runSitemapper(): Sitemap up to date'.NL;
275       return false;
276    }
277
278    $pages = file($conf['indexdir'].'/page.idx');
279    print 'runSitemapper(): creating sitemap using '.count($pages).' pages'.NL;
280
281    // build the sitemap
282    ob_start();
283    print '<?xml version="1.0" encoding="UTF-8"?>'.NL;
284    print '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'.NL;
285    foreach($pages as $id){
286        $id = trim($id);
287        $file = wikiFN($id);
288
289        //skip hidden, non existing and restricted files
290        if(isHiddenPage($id)) continue;
291        $date = @filemtime($file);
292        if(!$date) continue;
293        if(auth_aclcheck($id,'','') < AUTH_READ) continue;
294
295        print '  <url>'.NL;
296        print '    <loc>'.wl($id,'',true).'</loc>'.NL;
297        print '    <lastmod>'.date_iso8601($date).'</lastmod>'.NL;
298        print '  </url>'.NL;
299    }
300    print '</urlset>'.NL;
301    $data = ob_get_contents();
302    ob_end_clean();
303
304    //save the new sitemap
305    io_saveFile(DOKU_INC.$sitemap,$data);
306
307    //ping search engines...
308    $http = new DokuHTTPClient();
309    $http->timeout = 8;
310
311    //ping google
312    print 'runSitemapper(): pinging google'.NL;
313    $url  = 'http://www.google.com/webmasters/sitemaps/ping?sitemap=';
314    $url .= urlencode(DOKU_URL.$sitemap);
315    $resp = $http->get($url);
316    if($http->error) print 'runSitemapper(): '.$http->error.NL;
317    print 'runSitemapper(): '.preg_replace('/[\n\r]/',' ',strip_tags($resp)).NL;
318
319    //ping yahoo
320    print 'runSitemapper(): pinging yahoo'.NL;
321    $url  = 'http://search.yahooapis.com/SiteExplorerService/V1/updateNotification?appid=dokuwiki&url=';
322    $url .= urlencode(DOKU_URL.$sitemap);
323    $resp = $http->get($url);
324    if($http->error) print 'runSitemapper(): '.$http->error.NL;
325    print 'runSitemapper(): '.preg_replace('/[\n\r]/',' ',strip_tags($resp)).NL;
326
327    //ping microsoft
328    print 'runSitemapper(): pinging microsoft'.NL;
329    $url  = 'http://webmaster.live.com/webmaster/ping.aspx?sitemap=';
330    $url .= urlencode(DOKU_URL.$sitemap);
331    $resp = $http->get($url);
332    if($http->error) print 'runSitemapper(): '.$http->error.NL;
333    print 'runSitemapper(): '.preg_replace('/[\n\r]/',' ',strip_tags($resp)).NL;
334
335    print 'runSitemapper(): finished'.NL;
336    return true;
337}
338
339/**
340 * Formats a timestamp as ISO 8601 date
341 *
342 * @author <ungu at terong dot com>
343 * @link http://www.php.net/manual/en/function.date.php#54072
344 */
345function date_iso8601($int_date) {
346   //$int_date: current date in UNIX timestamp
347   $date_mod = date('Y-m-d\TH:i:s', $int_date);
348   $pre_timezone = date('O', $int_date);
349   $time_zone = substr($pre_timezone, 0, 3).":".substr($pre_timezone, 3, 2);
350   $date_mod .= $time_zone;
351   return $date_mod;
352}
353
354/**
355 * Just send a 1x1 pixel blank gif to the browser
356 *
357 * @author Andreas Gohr <andi@splitbrain.org>
358 * @author Harry Fuecks <fuecks@gmail.com>
359 */
360function sendGIF(){
361    if($_REQUEST['debug']){
362        header('Content-Type: text/plain');
363        return;
364    }
365    $img = base64_decode('R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAEALAAAAAABAAEAAAIBTAA7');
366    header('Content-Type: image/gif');
367    header('Content-Length: '.strlen($img));
368    header('Connection: Close');
369    print $img;
370    flush();
371    // Browser should drop connection after this
372    // Thinks it's got the whole image
373}
374
375//Setup VIM: ex: et ts=4 enc=utf-8 :
376// No trailing PHP closing tag - no output please!
377// See Note at http://www.php.net/manual/en/language.basic-syntax.instruction-separation.php
378