xref: /dokuwiki/inc/infoutils.php (revision 662b410dfad82e5d7fbfce929dc41e715bf2af2a) 
1<?php
2/**
3 * Information and debugging functions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8if(!defined('DOKU_INC')) die('meh.');
9
10if(!defined('DOKU_MESSAGEURL')){
11    if(in_array('ssl', stream_get_transports())) {
12        define('DOKU_MESSAGEURL','https://update.dokuwiki.org/check/');
13    }else{
14        define('DOKU_MESSAGEURL','http://update.dokuwiki.org/check/');
15    }
16}
17
18/**
19 * Check for new messages from upstream
20 *
21 * @author Andreas Gohr <andi@splitbrain.org>
22 */
23function checkUpdateMessages(){
24    global $conf;
25    global $INFO;
26    global $updateVersion;
27    if(!$conf['updatecheck']) return;
28    if($conf['useacl'] && !$INFO['ismanager']) return;
29
30    $cf = getCacheName($updateVersion, '.updmsg');
31    $lm = @filemtime($cf);
32    $is_http = substr(DOKU_MESSAGEURL, 0, 5) != 'https';
33
34    // check if new messages needs to be fetched
35    if($lm < time()-(60*60*24) || $lm < @filemtime(DOKU_INC.DOKU_SCRIPT)){
36        @touch($cf);
37        dbglog("checkUpdateMessages(): downloading messages to ".$cf.($is_http?' (without SSL)':' (with SSL)'));
38        $http = new DokuHTTPClient();
39        $http->timeout = 12;
40        $resp = $http->get(DOKU_MESSAGEURL.$updateVersion);
41        if(is_string($resp) && ($resp == "" || substr(trim($resp), -1) == '%')) {
42            // basic sanity check that this is either an empty string response (ie "no messages")
43            // or it looks like one of our messages, not WiFi login or other interposed response
44            io_saveFile($cf,$resp);
45        } else {
46            dbglog("checkUpdateMessages(): unexpected HTTP response received");
47        }
48    }else{
49        dbglog("checkUpdateMessages(): messages up to date");
50    }
51
52    $data = io_readFile($cf);
53    // show messages through the usual message mechanism
54    $msgs = explode("\n%\n",$data);
55    foreach($msgs as $msg){
56        if($msg) msg($msg,2);
57    }
58}
59
60
61/**
62 * Return DokuWiki's version (split up in date and type)
63 *
64 * @author Andreas Gohr <andi@splitbrain.org>
65 */
66function getVersionData(){
67    $version = array();
68    //import version string
69    if(file_exists(DOKU_INC.'VERSION')){
70        //official release
71        $version['date'] = trim(io_readFile(DOKU_INC.'VERSION'));
72        $version['type'] = 'Release';
73    }elseif(is_dir(DOKU_INC.'.git')){
74        $version['type'] = 'Git';
75        $version['date'] = 'unknown';
76
77        $inventory = DOKU_INC.'.git/logs/HEAD';
78        if(is_file($inventory)){
79            $sz   = filesize($inventory);
80            $seek = max(0,$sz-2000); // read from back of the file
81            $fh   = fopen($inventory,'rb');
82            fseek($fh,$seek);
83            $chunk = fread($fh,2000);
84            fclose($fh);
85            $chunk = trim($chunk);
86            $chunk = @array_pop(explode("\n",$chunk));   //last log line
87            $chunk = @array_shift(explode("\t",$chunk)); //strip commit msg
88            $chunk = explode(" ",$chunk);
89            array_pop($chunk); //strip timezone
90            $date = date('Y-m-d',array_pop($chunk));
91            if($date) $version['date'] = $date;
92        }
93    }else{
94        global $updateVersion;
95        $version['date'] = 'update version '.$updateVersion;
96        $version['type'] = 'snapshot?';
97    }
98    return $version;
99}
100
101/**
102 * Return DokuWiki's version (as a string)
103 *
104 * @author Anika Henke <anika@selfthinker.org>
105 */
106function getVersion(){
107    $version = getVersionData();
108    return $version['type'].' '.$version['date'];
109}
110
111/**
112 * Run a few sanity checks
113 *
114 * @author Andreas Gohr <andi@splitbrain.org>
115 */
116function check(){
117    global $conf;
118    global $INFO;
119    /* @var Input $INPUT */
120    global $INPUT;
121
122    if ($INFO['isadmin'] || $INFO['ismanager']){
123        msg('DokuWiki version: '.getVersion(),1);
124
125        if(version_compare(phpversion(),'5.6.0','<')){
126            msg('Your PHP version is too old ('.phpversion().' vs. 5.6.0+ needed)',-1);
127        }else{
128            msg('PHP version '.phpversion(),1);
129        }
130    } else {
131        if(version_compare(phpversion(),'5.6.0','<')){
132            msg('Your PHP version is too old',-1);
133        }
134    }
135
136    $mem = (int) php_to_byte(ini_get('memory_limit'));
137    if($mem){
138        if($mem === -1) {
139            msg('PHP memory is unlimited', 1);
140        } else if($mem < 16777216){
141            msg('PHP is limited to less than 16MB RAM ('.filesize_h($mem).'). Increase memory_limit in php.ini',-1);
142        } else if($mem < 20971520){
143            msg('PHP is limited to less than 20MB RAM ('.filesize_h($mem).'), you might encounter problems with bigger pages. Increase memory_limit in php.ini',-1);
144        } else if($mem < 33554432){
145            msg('PHP is limited to less than 32MB RAM ('.filesize_h($mem).'), but that should be enough in most cases. If not, increase memory_limit in php.ini',0);
146        } else {
147            msg('More than 32MB RAM ('.filesize_h($mem).') available.',1);
148        }
149    }
150
151    if(is_writable($conf['changelog'])){
152        msg('Changelog is writable',1);
153    }else{
154        if (file_exists($conf['changelog'])) {
155            msg('Changelog is not writable',-1);
156        }
157    }
158
159    if (isset($conf['changelog_old']) && file_exists($conf['changelog_old'])) {
160        msg('Old changelog exists', 0);
161    }
162
163    if (file_exists($conf['changelog'].'_failed')) {
164        msg('Importing old changelog failed', -1);
165    } else if (file_exists($conf['changelog'].'_importing')) {
166        msg('Importing old changelog now.', 0);
167    } else if (file_exists($conf['changelog'].'_import_ok')) {
168        msg('Old changelog imported', 1);
169        if (!plugin_isdisabled('importoldchangelog')) {
170            msg('Importoldchangelog plugin not disabled after import', -1);
171        }
172    }
173
174    if(is_writable(DOKU_CONF)){
175        msg('conf directory is writable',1);
176    }else{
177        msg('conf directory is not writable',-1);
178    }
179
180    if($conf['authtype'] == 'plain'){
181        global $config_cascade;
182        if(is_writable($config_cascade['plainauth.users']['default'])){
183            msg('conf/users.auth.php is writable',1);
184        }else{
185            msg('conf/users.auth.php is not writable',0);
186        }
187    }
188
189    if(function_exists('mb_strpos')){
190        if(defined('UTF8_NOMBSTRING')){
191            msg('mb_string extension is available but will not be used',0);
192        }else{
193            msg('mb_string extension is available and will be used',1);
194            if(ini_get('mbstring.func_overload') != 0){
195                msg('mb_string function overloading is enabled, this will cause problems and should be disabled',-1);
196            }
197        }
198    }else{
199        msg('mb_string extension not available - PHP only replacements will be used',0);
200    }
201
202    if (!UTF8_PREGSUPPORT) {
203        msg('PHP is missing UTF-8 support in Perl-Compatible Regular Expressions (PCRE)', -1);
204    }
205    if (!UTF8_PROPERTYSUPPORT) {
206        msg('PHP is missing Unicode properties support in Perl-Compatible Regular Expressions (PCRE)', -1);
207    }
208
209    $loc = setlocale(LC_ALL, 0);
210    if(!$loc){
211        msg('No valid locale is set for your PHP setup. You should fix this',-1);
212    }elseif(stripos($loc,'utf') === false){
213        msg('Your locale <code>'.hsc($loc).'</code> seems not to be a UTF-8 locale, you should fix this if you encounter problems.',0);
214    }else{
215        msg('Valid locale '.hsc($loc).' found.', 1);
216    }
217
218    if($conf['allowdebug']){
219        msg('Debugging support is enabled. If you don\'t need it you should set $conf[\'allowdebug\'] = 0',-1);
220    }else{
221        msg('Debugging support is disabled',1);
222    }
223
224    if($INFO['userinfo']['name']){
225        msg('You are currently logged in as '.$INPUT->server->str('REMOTE_USER').' ('.$INFO['userinfo']['name'].')',0);
226        msg('You are part of the groups '.join($INFO['userinfo']['grps'],', '),0);
227    }else{
228        msg('You are currently not logged in',0);
229    }
230
231    msg('Your current permission for this page is '.$INFO['perm'],0);
232
233    if(is_writable($INFO['filepath'])){
234        msg('The current page is writable by the webserver',0);
235    }else{
236        msg('The current page is not writable by the webserver',0);
237    }
238
239    if($INFO['writable']){
240        msg('The current page is writable by you',0);
241    }else{
242        msg('The current page is not writable by you',0);
243    }
244
245    // Check for corrupted search index
246    $lengths = idx_listIndexLengths();
247    $index_corrupted = false;
248    foreach ($lengths as $length) {
249        if (count(idx_getIndex('w', $length)) != count(idx_getIndex('i', $length))) {
250            $index_corrupted = true;
251            break;
252        }
253    }
254
255    foreach (idx_getIndex('metadata', '') as $index) {
256        if (count(idx_getIndex($index.'_w', '')) != count(idx_getIndex($index.'_i', ''))) {
257            $index_corrupted = true;
258            break;
259        }
260    }
261
262    if($index_corrupted) {
263        msg(
264            'The search index is corrupted. It might produce wrong results and most
265                probably needs to be rebuilt. See
266                <a href="http://www.dokuwiki.org/faq:searchindex">faq:searchindex</a>
267                for ways to rebuild the search index.', -1
268        );
269    } elseif(!empty($lengths)) {
270        msg('The search index seems to be working', 1);
271    } else {
272        msg(
273            'The search index is empty. See
274                <a href="http://www.dokuwiki.org/faq:searchindex">faq:searchindex</a>
275                for help on how to fix the search index. If the default indexer
276                isn\'t used or the wiki is actually empty this is normal.'
277        );
278    }
279
280    // rough time check
281    $http = new DokuHTTPClient();
282    $http->max_redirect = 0;
283    $http->timeout = 3;
284    $http->sendRequest('http://www.dokuwiki.org', '', 'HEAD');
285    $now = time();
286    if(isset($http->resp_headers['date'])) {
287        $time = strtotime($http->resp_headers['date']);
288        $diff = $time - $now;
289
290        if(abs($diff) < 4) {
291            msg("Server time seems to be okay. Diff: {$diff}s", 1);
292        } else {
293            msg("Your server's clock seems to be out of sync! Consider configuring a sync with a NTP server.  Diff: {$diff}s");
294        }
295    }
296
297}
298
299/**
300 * print a message
301 *
302 * If HTTP headers were not sent yet the message is added
303 * to the global message array else it's printed directly
304 * using html_msgarea()
305 *
306 *
307 * Levels can be:
308 *
309 * -1 error
310 *  0 info
311 *  1 success
312 *
313 * @author Andreas Gohr <andi@splitbrain.org>
314 * @see    html_msgarea
315 */
316
317define('MSG_PUBLIC', 0);
318define('MSG_USERS_ONLY', 1);
319define('MSG_MANAGERS_ONLY',2);
320define('MSG_ADMINS_ONLY',4);
321
322/**
323 * Display a message to the user
324 *
325 * @param string $message
326 * @param int    $lvl   -1 = error, 0 = info, 1 = success, 2 = notify
327 * @param string $line  line number
328 * @param string $file  file number
329 * @param int    $allow who's allowed to see the message, see MSG_* constants
330 */
331function msg($message,$lvl=0,$line='',$file='',$allow=MSG_PUBLIC){
332    global $MSG, $MSG_shown;
333    $errors = array();
334    $errors[-1] = 'error';
335    $errors[0]  = 'info';
336    $errors[1]  = 'success';
337    $errors[2]  = 'notify';
338
339    if($line || $file) $message.=' ['.utf8_basename($file).':'.$line.']';
340
341    if(!isset($MSG)) $MSG = array();
342    $MSG[]=array('lvl' => $errors[$lvl], 'msg' => $message, 'allow' => $allow);
343    if(isset($MSG_shown) || headers_sent()){
344        if(function_exists('html_msgarea')){
345            html_msgarea();
346        }else{
347            print "ERROR($lvl) $message";
348        }
349        unset($GLOBALS['MSG']);
350    }
351}
352/**
353 * Determine whether the current user is allowed to view the message
354 * in the $msg data structure
355 *
356 * @param  $msg   array    dokuwiki msg structure
357 *                         msg   => string, the message
358 *                         lvl   => int, level of the message (see msg() function)
359 *                         allow => int, flag used to determine who is allowed to see the message
360 *                                       see MSG_* constants
361 * @return bool
362 */
363function info_msg_allowed($msg){
364    global $INFO, $auth;
365
366    // is the message public? - everyone and anyone can see it
367    if (empty($msg['allow']) || ($msg['allow'] == MSG_PUBLIC)) return true;
368
369    // restricted msg, but no authentication
370    if (empty($auth)) return false;
371
372    switch ($msg['allow']){
373        case MSG_USERS_ONLY:
374            return !empty($INFO['userinfo']);
375
376        case MSG_MANAGERS_ONLY:
377            return $INFO['ismanager'];
378
379        case MSG_ADMINS_ONLY:
380            return $INFO['isadmin'];
381
382        default:
383            trigger_error('invalid msg allow restriction.  msg="'.$msg['msg'].'" allow='.$msg['allow'].'"', E_USER_WARNING);
384            return $INFO['isadmin'];
385    }
386
387    return false;
388}
389
390/**
391 * print debug messages
392 *
393 * little function to print the content of a var
394 *
395 * @author Andreas Gohr <andi@splitbrain.org>
396 *
397 * @param string $msg
398 * @param bool $hidden
399 */
400function dbg($msg,$hidden=false){
401    if($hidden){
402        echo "<!--\n";
403        print_r($msg);
404        echo "\n-->";
405    }else{
406        echo '<pre class="dbg">';
407        echo hsc(print_r($msg,true));
408        echo '</pre>';
409    }
410}
411
412/**
413 * Print info to a log file
414 *
415 * @author Andreas Gohr <andi@splitbrain.org>
416 *
417 * @param string $msg
418 * @param string $header
419 */
420function dbglog($msg,$header=''){
421    global $conf;
422    /* @var Input $INPUT */
423    global $INPUT;
424
425    // The debug log isn't automatically cleaned thus only write it when
426    // debugging has been enabled by the user.
427    if($conf['allowdebug'] !== 1) return;
428    if(is_object($msg) || is_array($msg)){
429        $msg = print_r($msg,true);
430    }
431
432    if($header) $msg = "$header\n$msg";
433
434    $file = $conf['cachedir'].'/debug.log';
435    $fh = fopen($file,'a');
436    if($fh){
437        fwrite($fh,date('H:i:s ').$INPUT->server->str('REMOTE_ADDR').': '.$msg."\n");
438        fclose($fh);
439    }
440}
441
442/**
443 * Log accesses to deprecated fucntions to the debug log
444 *
445 * @param string $alternative The function or method that should be used instead
446 * @triggers INFO_DEPRECATION_LOG
447 */
448function dbg_deprecated($alternative = '') {
449    global $conf;
450    global $EVENT_HANDLER;
451    if(!$conf['allowdebug'] && !$EVENT_HANDLER->hasHandlerForEvent('INFO_DEPRECATION_LOG')) {
452        // avoid any work if no one cares
453        return;
454    }
455
456    $backtrace = debug_backtrace();
457    array_shift($backtrace);
458    $self = $backtrace[0];
459    $call = $backtrace[1];
460
461    $data = [
462        'trace' => $backtrace,
463        'alternative' => $alternative,
464        'called' => trim($self['class'] . '::' . $self['function'] . '()', ':'),
465        'caller' => trim($call['class'] . '::' . $call['function'] . '()', ':'),
466        'file' => $call['file'],
467        'line' => $call['line'],
468    ];
469
470    $event = new Doku_Event('INFO_DEPRECATION_LOG', $data);
471    if($event->advise_before()) {
472        $msg = $event->data['called'] . ' is deprecated. It was called from ';
473        $msg .= $event->data['caller'] . ' in ' . $event->data['file'] . ':' . $event->data['line'];
474        if($event->data['alternative']) {
475            $msg .= ' ' . $event->data['alternative'] . ' should be used instead!';
476        }
477        dbglog($msg);
478    }
479    $event->advise_after();
480}
481
482/**
483 * Print a reversed, prettyprinted backtrace
484 *
485 * @author Gary Owen <gary_owen@bigfoot.com>
486 */
487function dbg_backtrace(){
488    // Get backtrace
489    $backtrace = debug_backtrace();
490
491    // Unset call to debug_print_backtrace
492    array_shift($backtrace);
493
494    // Iterate backtrace
495    $calls = array();
496    $depth = count($backtrace) - 1;
497    foreach ($backtrace as $i => $call) {
498        $location = $call['file'] . ':' . $call['line'];
499        $function = (isset($call['class'])) ?
500            $call['class'] . $call['type'] . $call['function'] : $call['function'];
501
502        $params = array();
503        if (isset($call['args'])){
504            foreach($call['args'] as $arg){
505                if(is_object($arg)){
506                    $params[] = '[Object '.get_class($arg).']';
507                }elseif(is_array($arg)){
508                    $params[] = '[Array]';
509                }elseif(is_null($arg)){
510                    $params[] = '[NULL]';
511                }else{
512                    $params[] = (string) '"'.$arg.'"';
513                }
514            }
515        }
516        $params = implode(', ',$params);
517
518        $calls[$depth - $i] = sprintf('%s(%s) called at %s',
519                $function,
520                str_replace("\n", '\n', $params),
521                $location);
522    }
523    ksort($calls);
524
525    return implode("\n", $calls);
526}
527
528/**
529 * Remove all data from an array where the key seems to point to sensitive data
530 *
531 * This is used to remove passwords, mail addresses and similar data from the
532 * debug output
533 *
534 * @author Andreas Gohr <andi@splitbrain.org>
535 *
536 * @param array $data
537 */
538function debug_guard(&$data){
539    foreach($data as $key => $value){
540        if(preg_match('/(notify|pass|auth|secret|ftp|userinfo|token|buid|mail|proxy)/i',$key)){
541            $data[$key] = '***';
542            continue;
543        }
544        if(is_array($value)) debug_guard($data[$key]);
545    }
546}
547