xref: /dokuwiki/inc/actions.php (revision e7f921dcad959dc0d27e53da4d77f5b1211c030a) 
1<?php
2/**
3 * DokuWiki Actions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9if(!defined('DOKU_INC')) die('meh.');
10
11/**
12 * Call the needed action handlers
13 *
14 * @author Andreas Gohr <andi@splitbrain.org>
15 * @triggers ACTION_ACT_PREPROCESS
16 * @triggers ACTION_HEADERS_SEND
17 */
18function act_dispatch(){
19    global $ACT;
20    global $ID;
21    global $INFO;
22    global $QUERY;
23    global $lang;
24    global $conf;
25
26    $preact = $ACT;
27
28    // give plugins an opportunity to process the action
29    $evt = new Doku_Event('ACTION_ACT_PREPROCESS',$ACT);
30    if ($evt->advise_before()) {
31
32        //sanitize $ACT
33        $ACT = act_clean($ACT);
34
35        //check if searchword was given - else just show
36        $s = cleanID($QUERY);
37        if($ACT == 'search' && empty($s)){
38            $ACT = 'show';
39        }
40
41        //login stuff
42        if(in_array($ACT,array('login','logout'))){
43            $ACT = act_auth($ACT);
44        }
45
46        //check if user is asking to (un)subscribe a page
47        if($ACT == 'subscribe') {
48            try {
49                $ACT = act_subscription($ACT);
50            } catch (Exception $e) {
51                msg($e->getMessage(), -1);
52            }
53        }
54
55        //display some infos
56        if($ACT == 'check'){
57            check();
58            $ACT = 'show';
59        }
60
61        //check permissions
62        $ACT = act_permcheck($ACT);
63
64        //sitemap
65        if ($ACT == 'sitemap'){
66            $ACT = act_sitemap($ACT);
67        }
68
69        //register
70        if($ACT == 'register' && $_POST['save'] && register()){
71            $ACT = 'login';
72        }
73
74        if ($ACT == 'resendpwd' && act_resendpwd()) {
75            $ACT = 'login';
76        }
77
78        //update user profile
79        if ($ACT == 'profile') {
80            if(!$_SERVER['REMOTE_USER']) {
81                $ACT = 'login';
82            } else {
83                if(updateprofile()) {
84                    msg($lang['profchanged'],1);
85                    $ACT = 'show';
86                }
87            }
88        }
89
90        //revert
91        if($ACT == 'revert'){
92            if(checkSecurityToken()){
93                $ACT = act_revert($ACT);
94            }else{
95                $ACT = 'show';
96            }
97        }
98
99        //save
100        if($ACT == 'save'){
101            if(checkSecurityToken()){
102                $ACT = act_save($ACT);
103            }else{
104                $ACT = 'show';
105            }
106        }
107
108        //cancel conflicting edit
109        if($ACT == 'cancel')
110            $ACT = 'show';
111
112        //draft deletion
113        if($ACT == 'draftdel')
114            $ACT = act_draftdel($ACT);
115
116        //draft saving on preview
117        if($ACT == 'preview')
118            $ACT = act_draftsave($ACT);
119
120        //edit
121        if(in_array($ACT, array('edit', 'preview', 'recover'))) {
122            $ACT = act_edit($ACT);
123        }else{
124            unlock($ID); //try to unlock
125        }
126
127        //handle export
128        if(substr($ACT,0,7) == 'export_')
129            $ACT = act_export($ACT);
130
131        //handle admin tasks
132        if($ACT == 'admin'){
133            // retrieve admin plugin name from $_REQUEST['page']
134            if (!empty($_REQUEST['page'])) {
135                $pluginlist = plugin_list('admin');
136                if (in_array($_REQUEST['page'], $pluginlist)) {
137                    // attempt to load the plugin
138                    if ($plugin =& plugin_load('admin',$_REQUEST['page']) !== null){
139                        if($plugin->forAdminOnly() && !$INFO['isadmin']){
140                            // a manager tried to load a plugin that's for admins only
141                            unset($_REQUEST['page']);
142                            msg('For admins only',-1);
143                        }else{
144                            $plugin->handle();
145                        }
146                    }
147                }
148            }
149        }
150
151        // check permissions again - the action may have changed
152        $ACT = act_permcheck($ACT);
153    }  // end event ACTION_ACT_PREPROCESS default action
154    $evt->advise_after();
155    // Make sure plugs can handle 'denied'
156    if($conf['send404'] && $ACT == 'denied') {
157        header('HTTP/1.0 403 Forbidden');
158    }
159    unset($evt);
160
161    // when action 'show', the intial not 'show' and POST, do a redirect
162    if($ACT == 'show' && $preact != 'show' && strtolower($_SERVER['REQUEST_METHOD']) == 'post'){
163        act_redirect($ID,$preact);
164    }
165
166    global $INFO;
167    global $conf;
168    global $license;
169
170    //call template FIXME: all needed vars available?
171    $headers[] = 'Content-Type: text/html; charset=utf-8';
172    trigger_event('ACTION_HEADERS_SEND',$headers,'act_sendheaders');
173
174    include(template('main.php'));
175    // output for the commands is now handled in inc/templates.php
176    // in function tpl_content()
177}
178
179function act_sendheaders($headers) {
180    foreach ($headers as $hdr) header($hdr);
181}
182
183/**
184 * Sanitize the action command
185 *
186 * Add all allowed commands here.
187 *
188 * @author Andreas Gohr <andi@splitbrain.org>
189 */
190function act_clean($act){
191    global $lang;
192    global $conf;
193    global $INFO;
194
195    // check if the action was given as array key
196    if(is_array($act)){
197        list($act) = array_keys($act);
198    }
199
200    //remove all bad chars
201    $act = strtolower($act);
202    $act = preg_replace('/[^1-9a-z_]+/','',$act);
203
204    if($act == 'export_html') $act = 'export_xhtml';
205    if($act == 'export_htmlbody') $act = 'export_xhtmlbody';
206
207    if($act === '') $act = 'show';
208
209    // check if action is disabled
210    if(!actionOK($act)){
211        msg('Command disabled: '.htmlspecialchars($act),-1);
212        return 'show';
213    }
214
215    //disable all acl related commands if ACL is disabled
216    if(!$conf['useacl'] && in_array($act,array('login','logout','register','admin',
217                    'subscribe','unsubscribe','profile','revert',
218                    'resendpwd','subscribens','unsubscribens',))){
219        msg('Command unavailable: '.htmlspecialchars($act),-1);
220        return 'show';
221    }
222
223    //is there really a draft?
224    if($act == 'draft' && !file_exists($INFO['draft'])) return 'edit';
225
226    if(!in_array($act,array('login','logout','register','save','cancel','edit','draft',
227                    'preview','search','show','check','index','revisions',
228                    'diff','recent','backlink','admin','subscribe','revert',
229                    'unsubscribe','profile','resendpwd','recover',
230                    'draftdel','subscribens','unsubscribens','sitemap')) && substr($act,0,7) != 'export_' ) {
231        msg('Command unknown: '.htmlspecialchars($act),-1);
232        return 'show';
233    }
234    return $act;
235}
236
237/**
238 * Run permissionchecks
239 *
240 * @author Andreas Gohr <andi@splitbrain.org>
241 */
242function act_permcheck($act){
243    global $INFO;
244    global $conf;
245
246    if(in_array($act,array('save','preview','edit','recover'))){
247        if($INFO['exists']){
248            if($act == 'edit'){
249                //the edit function will check again and do a source show
250                //when no AUTH_EDIT available
251                $permneed = AUTH_READ;
252            }else{
253                $permneed = AUTH_EDIT;
254            }
255        }else{
256            $permneed = AUTH_CREATE;
257        }
258    }elseif(in_array($act,array('login','search','recent','profile','index', 'sitemap'))){
259        $permneed = AUTH_NONE;
260    }elseif($act == 'revert'){
261        $permneed = AUTH_ADMIN;
262        if($INFO['ismanager']) $permneed = AUTH_EDIT;
263    }elseif($act == 'register'){
264        $permneed = AUTH_NONE;
265    }elseif($act == 'resendpwd'){
266        $permneed = AUTH_NONE;
267    }elseif($act == 'admin'){
268        if($INFO['ismanager']){
269            // if the manager has the needed permissions for a certain admin
270            // action is checked later
271            $permneed = AUTH_READ;
272        }else{
273            $permneed = AUTH_ADMIN;
274        }
275    }else{
276        $permneed = AUTH_READ;
277    }
278    if($INFO['perm'] >= $permneed) return $act;
279
280    return 'denied';
281}
282
283/**
284 * Handle 'draftdel'
285 *
286 * Deletes the draft for the current page and user
287 */
288function act_draftdel($act){
289    global $INFO;
290    @unlink($INFO['draft']);
291    $INFO['draft'] = null;
292    return 'show';
293}
294
295/**
296 * Saves a draft on preview
297 *
298 * @todo this currently duplicates code from ajax.php :-/
299 */
300function act_draftsave($act){
301    global $INFO;
302    global $ID;
303    global $conf;
304    if($conf['usedraft'] && $_POST['wikitext']){
305        $draft = array('id'     => $ID,
306                'prefix' => substr($_POST['prefix'], 0, -1),
307                'text'   => $_POST['wikitext'],
308                'suffix' => $_POST['suffix'],
309                'date'   => (int) $_POST['date'],
310                'client' => $INFO['client'],
311                );
312        $cname = getCacheName($draft['client'].$ID,'.draft');
313        if(io_saveFile($cname,serialize($draft))){
314            $INFO['draft'] = $cname;
315        }
316    }
317    return $act;
318}
319
320/**
321 * Handle 'save'
322 *
323 * Checks for spam and conflicts and saves the page.
324 * Does a redirect to show the page afterwards or
325 * returns a new action.
326 *
327 * @author Andreas Gohr <andi@splitbrain.org>
328 */
329function act_save($act){
330    global $ID;
331    global $DATE;
332    global $PRE;
333    global $TEXT;
334    global $SUF;
335    global $SUM;
336    global $lang;
337    global $INFO;
338
339    //spam check
340    if(checkwordblock()) {
341        msg($lang['wordblock'], -1);
342        return 'edit';
343    }
344    //conflict check
345    if($DATE != 0 && $INFO['meta']['date']['modified'] > $DATE )
346        return 'conflict';
347
348    //save it
349    saveWikiText($ID,con($PRE,$TEXT,$SUF,1),$SUM,$_REQUEST['minor']); //use pretty mode for con
350    //unlock it
351    unlock($ID);
352
353    //delete draft
354    act_draftdel($act);
355    session_write_close();
356
357    // when done, show page
358    return 'show';
359}
360
361/**
362 * Revert to a certain revision
363 *
364 * @author Andreas Gohr <andi@splitbrain.org>
365 */
366function act_revert($act){
367    global $ID;
368    global $REV;
369    global $lang;
370    // FIXME $INFO['writable'] currently refers to the attic version
371    // global $INFO;
372    // if (!$INFO['writable']) {
373    //     return 'show';
374    // }
375
376    // when no revision is given, delete current one
377    // FIXME this feature is not exposed in the GUI currently
378    $text = '';
379    $sum  = $lang['deleted'];
380    if($REV){
381        $text = rawWiki($ID,$REV);
382        if(!$text) return 'show'; //something went wrong
383        $sum  = $lang['restored'];
384    }
385
386    // spam check
387
388    if (checkwordblock($text)) {
389        msg($lang['wordblock'], -1);
390        return 'edit';
391    }
392
393    saveWikiText($ID,$text,$sum,false);
394    msg($sum,1);
395
396    //delete any draft
397    act_draftdel($act);
398    session_write_close();
399
400    // when done, show current page
401    $_SERVER['REQUEST_METHOD'] = 'post'; //should force a redirect
402    $REV = '';
403    return 'show';
404}
405
406/**
407 * Do a redirect after receiving post data
408 *
409 * Tries to add the section id as hash mark after section editing
410 */
411function act_redirect($id,$preact){
412    global $PRE;
413    global $TEXT;
414
415    $opts = array(
416            'id'       => $id,
417            'preact'   => $preact
418            );
419    //get section name when coming from section edit
420    if($PRE && preg_match('/^\s*==+([^=\n]+)/',$TEXT,$match)){
421        $check = false; //Byref
422        $opts['fragment'] = sectionID($match[0], $check);
423    }
424
425    trigger_event('ACTION_SHOW_REDIRECT',$opts,'act_redirect_execute');
426}
427
428function act_redirect_execute($opts){
429    $go = wl($opts['id'],'',true);
430    if(isset($opts['fragment'])) $go .= '#'.$opts['fragment'];
431
432    //show it
433    send_redirect($go);
434}
435
436/**
437 * Handle 'login', 'logout'
438 *
439 * @author Andreas Gohr <andi@splitbrain.org>
440 */
441function act_auth($act){
442    global $ID;
443    global $INFO;
444
445    //already logged in?
446    if(isset($_SERVER['REMOTE_USER']) && $act=='login'){
447        return 'show';
448    }
449
450    //handle logout
451    if($act=='logout'){
452        $lockedby = checklock($ID); //page still locked?
453        if($lockedby == $_SERVER['REMOTE_USER'])
454            unlock($ID); //try to unlock
455
456        // do the logout stuff
457        auth_logoff();
458
459        // rebuild info array
460        $INFO = pageinfo();
461
462        act_redirect($ID,'login');
463    }
464
465    return $act;
466}
467
468/**
469 * Handle 'edit', 'preview', 'recover'
470 *
471 * @author Andreas Gohr <andi@splitbrain.org>
472 */
473function act_edit($act){
474    global $ID;
475    global $INFO;
476
477    global $TEXT;
478    global $RANGE;
479    global $PRE;
480    global $SUF;
481    global $REV;
482    global $SUM;
483    global $lang;
484    global $DATE;
485
486    if (!isset($TEXT)) {
487        if ($INFO['exists']) {
488            if ($RANGE) {
489                list($PRE,$TEXT,$SUF) = rawWikiSlices($RANGE,$ID,$REV);
490            } else {
491                $TEXT = rawWiki($ID,$REV);
492            }
493        } else {
494            $TEXT = pageTemplate($ID);
495        }
496    }
497
498    //set summary default
499    if(!$SUM){
500        if($REV){
501            $SUM = $lang['restored'];
502        }elseif(!$INFO['exists']){
503            $SUM = $lang['created'];
504        }
505    }
506
507    // Use the date of the newest revision, not of the revision we edit
508    // This is used for conflict detection
509    if(!$DATE) $DATE = $INFO['meta']['date']['modified'];
510
511    //check if locked by anyone - if not lock for my self
512    //do not lock when the user can't edit anyway
513    if ($INFO['writable']) {
514        $lockedby = checklock($ID);
515        if($lockedby) return 'locked';
516
517        lock($ID);
518    }
519
520    return $act;
521}
522
523/**
524 * Export a wiki page for various formats
525 *
526 * Triggers ACTION_EXPORT_POSTPROCESS
527 *
528 *  Event data:
529 *    data['id']      -- page id
530 *    data['mode']    -- requested export mode
531 *    data['headers'] -- export headers
532 *    data['output']  -- export output
533 *
534 * @author Andreas Gohr <andi@splitbrain.org>
535 * @author Michael Klier <chi@chimeric.de>
536 */
537function act_export($act){
538    global $ID;
539    global $REV;
540    global $conf;
541    global $lang;
542
543    $pre = '';
544    $post = '';
545    $output = '';
546    $headers = array();
547
548    // search engines: never cache exported docs! (Google only currently)
549    $headers['X-Robots-Tag'] = 'noindex';
550
551    $mode = substr($act,7);
552    switch($mode) {
553        case 'raw':
554            $headers['Content-Type'] = 'text/plain; charset=utf-8';
555            $headers['Content-Disposition'] = 'attachment; filename='.noNS($ID).'.txt';
556            $output = rawWiki($ID,$REV);
557            break;
558        case 'xhtml':
559            $pre .= '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"' . DOKU_LF;
560            $pre .= ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' . DOKU_LF;
561            $pre .= '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$conf['lang'].'"' . DOKU_LF;
562            $pre .= ' lang="'.$conf['lang'].'" dir="'.$lang['direction'].'">' . DOKU_LF;
563            $pre .= '<head>' . DOKU_LF;
564            $pre .= '  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />' . DOKU_LF;
565            $pre .= '  <title>'.$ID.'</title>' . DOKU_LF;
566
567            // get metaheaders
568            ob_start();
569            tpl_metaheaders();
570            $pre .= ob_get_clean();
571
572            $pre .= '</head>' . DOKU_LF;
573            $pre .= '<body>' . DOKU_LF;
574            $pre .= '<div class="dokuwiki export">' . DOKU_LF;
575
576            // get toc
577            $pre .= tpl_toc(true);
578
579            $headers['Content-Type'] = 'text/html; charset=utf-8';
580            $output = p_wiki_xhtml($ID,$REV,false);
581
582            $post .= '</div>' . DOKU_LF;
583            $post .= '</body>' . DOKU_LF;
584            $post .= '</html>' . DOKU_LF;
585            break;
586        case 'xhtmlbody':
587            $headers['Content-Type'] = 'text/html; charset=utf-8';
588            $output = p_wiki_xhtml($ID,$REV,false);
589            break;
590        default:
591            $output = p_cached_output(wikiFN($ID,$REV), $mode);
592            $headers = p_get_metadata($ID,"format $mode");
593            break;
594    }
595
596    // prepare event data
597    $data = array();
598    $data['id'] = $ID;
599    $data['mode'] = $mode;
600    $data['headers'] = $headers;
601    $data['output'] =& $output;
602
603    trigger_event('ACTION_EXPORT_POSTPROCESS', $data);
604
605    if(!empty($data['output'])){
606        if(is_array($data['headers'])) foreach($data['headers'] as $key => $val){
607            header("$key: $val");
608        }
609        print $pre.$data['output'].$post;
610        exit;
611    }
612    return 'show';
613}
614
615/**
616 * Handle sitemap delivery
617 *
618 * @author Michael Hamann <michael@content-space.de>
619 */
620function act_sitemap($act) {
621    global $conf;
622
623    if ($conf['sitemap'] < 1 || !is_numeric($conf['sitemap'])) {
624        header("HTTP/1.0 404 Not Found");
625        print "Sitemap generation is disabled.";
626        exit;
627    }
628
629    $sitemap = Sitemapper::getFilePath();
630    if(strrchr($sitemap, '.') === '.gz'){
631        $mime = 'application/x-gzip';
632    }else{
633        $mime = 'application/xml; charset=utf-8';
634    }
635
636    // Check if sitemap file exists, otherwise create it
637    if (!is_readable($sitemap)) {
638        Sitemapper::generate();
639    }
640
641    if (is_readable($sitemap)) {
642        // Send headers
643        header('Content-Type: '.$mime);
644        header('Content-Disposition: attachment; filename='.basename($sitemap));
645
646        http_conditionalRequest(filemtime($sitemap));
647
648        // Send file
649        //use x-sendfile header to pass the delivery to compatible webservers
650        if (http_sendfile($sitemap)) exit;
651
652        readfile($sitemap);
653        exit;
654    }
655
656    header("HTTP/1.0 500 Internal Server Error");
657    print "Could not read the sitemap file - bad permissions?";
658    exit;
659}
660
661/**
662 * Handle page 'subscribe'
663 *
664 * Throws exception on error.
665 *
666 * @author Adrian Lang <lang@cosmocode.de>
667 */
668function act_subscription($act){
669    global $lang;
670    global $INFO;
671    global $ID;
672
673    // subcriptions work for logged in users only
674    if(!$_SERVER['REMOTE_USER']) return 'show';
675
676    // get and preprocess data.
677    $params = array();
678    foreach(array('target', 'style', 'action') as $param) {
679        if (isset($_REQUEST["sub_$param"])) {
680            $params[$param] = $_REQUEST["sub_$param"];
681        }
682    }
683
684    // any action given? if not just return and show the subscription page
685    if(!$params['action'] || !checkSecurityToken()) return $act;
686
687    // Handle POST data, may throw exception.
688    trigger_event('ACTION_HANDLE_SUBSCRIBE', $params, 'subscription_handle_post');
689
690    $target = $params['target'];
691    $style  = $params['style'];
692    $data   = $params['data'];
693    $action = $params['action'];
694
695    // Perform action.
696    if (!subscription_set($_SERVER['REMOTE_USER'], $target, $style, $data)) {
697        throw new Exception(sprintf($lang["subscr_{$action}_error"],
698                                    hsc($INFO['userinfo']['name']),
699                                    prettyprint_id($target)));
700    }
701    msg(sprintf($lang["subscr_{$action}_success"], hsc($INFO['userinfo']['name']),
702                prettyprint_id($target)), 1);
703    act_redirect($ID, $act);
704
705    // Assure that we have valid data if act_redirect somehow fails.
706    $INFO['subscribed'] = get_info_subscribed();
707    return 'show';
708}
709
710/**
711 * Validate POST data
712 *
713 * Validates POST data for a subscribe or unsubscribe request. This is the
714 * default action for the event ACTION_HANDLE_SUBSCRIBE.
715 *
716 * @author Adrian Lang <lang@cosmocode.de>
717 */
718function subscription_handle_post(&$params) {
719    global $INFO;
720    global $lang;
721
722    // Get and validate parameters.
723    if (!isset($params['target'])) {
724        throw new Exception('no subscription target given');
725    }
726    $target = $params['target'];
727    $valid_styles = array('every', 'digest');
728    if (substr($target, -1, 1) === ':') {
729        // Allow “list” subscribe style since the target is a namespace.
730        $valid_styles[] = 'list';
731    }
732    $style  = valid_input_set('style', $valid_styles, $params,
733                              'invalid subscription style given');
734    $action = valid_input_set('action', array('subscribe', 'unsubscribe'),
735                              $params, 'invalid subscription action given');
736
737    // Check other conditions.
738    if ($action === 'subscribe') {
739        if ($INFO['userinfo']['mail'] === '') {
740            throw new Exception($lang['subscr_subscribe_noaddress']);
741        }
742    } elseif ($action === 'unsubscribe') {
743        $is = false;
744        foreach($INFO['subscribed'] as $subscr) {
745            if ($subscr['target'] === $target) {
746                $is = true;
747            }
748        }
749        if ($is === false) {
750            throw new Exception(sprintf($lang['subscr_not_subscribed'],
751                                        $_SERVER['REMOTE_USER'],
752                                        prettyprint_id($target)));
753        }
754        // subscription_set deletes a subscription if style = null.
755        $style = null;
756    }
757
758    $data = in_array($style, array('list', 'digest')) ? time() : null;
759    $params = compact('target', 'style', 'data', 'action');
760}
761
762//Setup VIM: ex: et ts=2 :
763