summaryrefslogtreecommitdiff
path: root/lib/exe/indexer.php
blob: 89c4b7cd0cdc0dfa118dba2aa056e384715ac822 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
<?php
/**
 * DokuWiki indexer
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Andreas Gohr <andi@splitbrain.org>
 */
if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../');
define('DOKU_DISABLE_GZIP_OUTPUT',1);
require_once(DOKU_INC.'inc/init.php');
session_write_close();  //close session
if(!defined('NL')) define('NL',"\n");

// keep running after browser closes connection
@ignore_user_abort(true);

// check if user abort worked, if yes send output early
$defer = !@ignore_user_abort() || $conf['broken_iua'];
$output = $INPUT->has('debug') && $conf['allowdebug'];
if(!$defer && !$output){
    sendGIF(); // send gif
}

$ID = cleanID($INPUT->str('id'));

// Catch any possible output (e.g. errors)
if(!$output) ob_start();
else header('Content-Type: text/plain');

// run one of the jobs
$tmp = array(); // No event data
$evt = new Doku_Event('INDEXER_TASKS_RUN', $tmp);
if ($evt->advise_before()) {
    runIndexer() or
    runSitemapper() or
    sendDigest() or
    runTrimRecentChanges() or
    runTrimRecentChanges(true) or
    $evt->advise_after();
}

if(!$output) {
    ob_end_clean();
    if($defer) sendGIF();
}

exit;

// --------------------------------------------------------------------

/**
 * Trims the recent changes cache (or imports the old changelog) as needed.
 *
 * @param bool $media_changes If the media changelog shall be trimmed instead of
 *                              the page changelog
 * @return bool
 *
 * @author Ben Coburn <btcoburn@silicodon.net>
 */
function runTrimRecentChanges($media_changes = false) {
    global $conf;

    echo "runTrimRecentChanges($media_changes): started".NL;

    $fn = ($media_changes ? $conf['media_changelog'] : $conf['changelog']);

    // Trim the Recent Changes
    // Trims the recent changes cache to the last $conf['changes_days'] recent
    // changes or $conf['recent'] items, which ever is larger.
    // The trimming is only done once a day.
    if (@file_exists($fn) &&
        (@filemtime($fn.'.trimmed')+86400)<time() &&
        !@file_exists($fn.'_tmp')) {
            @touch($fn.'.trimmed');
            io_lock($fn);
            $lines = file($fn);
            if (count($lines)<=$conf['recent']) {
                // nothing to trim
                io_unlock($fn);
                echo "runTrimRecentChanges($media_changes): finished".NL;
                return false;
            }

            io_saveFile($fn.'_tmp', '');          // presave tmp as 2nd lock
            $trim_time = time() - $conf['recent_days']*86400;
            $out_lines = array();
            $old_lines = array();
            for ($i=0; $i<count($lines); $i++) {
                $log = parseChangelogLine($lines[$i]);
                if ($log === false) continue;                      // discard junk
                if ($log['date'] < $trim_time) {
                    $old_lines[$log['date'].".$i"] = $lines[$i];     // keep old lines for now (append .$i to prevent key collisions)
                } else {
                    $out_lines[$log['date'].".$i"] = $lines[$i];     // definitely keep these lines
                }
            }

            if (count($lines)==count($out_lines)) {
              // nothing to trim
              @unlink($fn.'_tmp');
              io_unlock($fn);
              echo "runTrimRecentChanges($media_changes): finished".NL;
              return false;
            }

            // sort the final result, it shouldn't be necessary,
            //   however the extra robustness in making the changelog cache self-correcting is worth it
            ksort($out_lines);
            $extra = $conf['recent'] - count($out_lines);        // do we need extra lines do bring us up to minimum
            if ($extra > 0) {
              ksort($old_lines);
              $out_lines = array_merge(array_slice($old_lines,-$extra),$out_lines);
            }

            // save trimmed changelog
            io_saveFile($fn.'_tmp', implode('', $out_lines));
            @unlink($fn);
            if (!rename($fn.'_tmp', $fn)) {
                // rename failed so try another way...
                io_unlock($fn);
                io_saveFile($fn, implode('', $out_lines));
                @unlink($fn.'_tmp');
            } else {
                io_unlock($fn);
            }
            echo "runTrimRecentChanges($media_changes): finished".NL;
            return true;
    }

    // nothing done
    echo "runTrimRecentChanges($media_changes): finished".NL;
    return false;
}

/**
 * Runs the indexer for the current page
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 */
function runIndexer(){
    global $ID;
    global $conf;
    print "runIndexer(): started".NL;

    if(!$ID) return false;

    // do the work
    return idx_addPage($ID, true);
}

/**
 * Builds a Google Sitemap of all public pages known to the indexer
 *
 * The map is placed in the root directory named sitemap.xml.gz - This
 * file needs to be writable!
 *
 * @author Andreas Gohr
 * @link   https://www.google.com/webmasters/sitemaps/docs/en/about.html
 */
function runSitemapper(){
    print "runSitemapper(): started".NL;
    $result = Sitemapper::generate() && Sitemapper::pingSearchEngines();
    print 'runSitemapper(): finished'.NL;
    return $result;
}

/**
 * Send digest and list mails for all subscriptions which are in effect for the
 * current page
 *
 * @author Adrian Lang <lang@cosmocode.de>
 */
function sendDigest() {
    global $conf;
    global $ID;

    echo 'sendDigest(): started'.NL;
    if(!actionOK('subscribe')) {
        echo 'sendDigest(): disabled'.NL;
        return false;
    }
    $sub = new Subscription();
    $sent = $sub->send_bulk($ID);

    echo "sendDigest(): sent $sent mails".NL;
    echo 'sendDigest(): finished'.NL;
    return (bool) $sent;
}

/**
 * Just send a 1x1 pixel blank gif to the browser
 *
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Harry Fuecks <fuecks@gmail.com>
 */
function sendGIF(){
    $img = base64_decode('R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAEALAAAAAABAAEAAAIBTAA7');
    header('Content-Type: image/gif');
    header('Content-Length: '.strlen($img));
    header('Connection: Close');
    print $img;
    flush();
    // Browser should drop connection after this
    // Thinks it's got the whole image
}

//Setup VIM: ex: et ts=4 :
// No trailing PHP closing tag - no output please!
// See Note at http://www.php.net/manual/en/language.basic-syntax.instruction-separation.php