xref: /dokuwiki/lib/exe/indexer.php (revision b73cc7dccaa01778de20ade004e0c3bde2e2e36a) 
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 */
8
9/**
10 * Just send a 1x1 pixel blank gif to the browser and exit
11
12 */
13function sendGIF(){
14    $img = base64_decode('R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAEALAAAAAABAAEAAAIBTAA7');
15    header('Content-Type: image/gif');
16    header('Content-Length: '.strlen($img));
17    header('Connection: Close');
18    print $img;
19    // Browser should drop connection after this
20    // Thinks it's got the whole image
21}
22
23// Make sure image is sent to the browser immediately
24ob_implicit_flush(TRUE);
25
26// keep running after browser closes connection
27@ignore_user_abort(true);
28
29sendGIF();
30
31// Switch off implicit flush again - we don't want to send any more output
32ob_implicit_flush(FALSE);
33
34// Catch any possible output (e.g. errors)
35// - probably not needed but better safe...
36ob_start();
37
38// Called to exit - we don't want any output going anywhere
39function indexer_stop() {
40    ob_end_clean();
41    exit();
42}
43
44// Now start work
45if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
46require_once(DOKU_INC.'inc/init.php');
47//close session
48session_write_close();
49
50
51$ID = cleanID($_REQUEST['id']);
52if(!$ID) indexer_stop();
53
54// check if indexing needed
55$last = @filemtime(metaFN($ID,'.indexed'));
56if($last > @filemtime(wikiFN($ID))) indexer_stop();
57
58// try to aquire a lock
59$lock = $conf['lockdir'].'/_indexer.lock';
60while(!@mkdir($lock,0777)){
61    if(time()-@filemtime($lock) > 60*5){
62        // looks like a stale lock - remove it
63        @rmdir($lock);
64    }else{
65        indexer_stop();
66    }
67}
68
69require_once(DOKU_INC.'inc/indexer.php');
70
71// do the work
72idx_addPage($ID);
73
74// we're finished
75io_saveFile(metaFN($ID,'.indexed'),'');
76@rmdir($lock);
77indexer_stop();
78
79//Setup VIM: ex: et ts=4 enc=utf-8 :
80
81// No trailing PHP closing tag - no output please!
82// See Note at http://www.php.net/manual/en/language.basic-syntax.instruction-separation.php
83