xref: /dokuwiki/inc/actions.php (revision 8d557116a19d366c0f00592e4fa6250017295105) 
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 $INFO;
20    global $ACT;
21    global $ID;
22    global $QUERY;
23    global $lang;
24    global $conf;
25    global $license;
26
27    $preact = $ACT;
28
29    // give plugins an opportunity to process the action
30    $evt = new Doku_Event('ACTION_ACT_PREPROCESS',$ACT);
31    if ($evt->advise_before()) {
32
33        //sanitize $ACT
34        $ACT = act_clean($ACT);
35
36        //check if searchword was given - else just show
37        $s = cleanID($QUERY);
38        if($ACT == 'search' && empty($s)){
39            $ACT = 'show';
40        }
41
42        //login stuff
43        if(in_array($ACT,array('login','logout'))){
44            $ACT = act_auth($ACT);
45        }
46
47        //check if user is asking to (un)subscribe a page
48        if($ACT == 'subscribe') {
49            try {
50                $ACT = act_subscription($ACT);
51            } catch (Exception $e) {
52                msg($e->getMessage(), -1);
53            }
54        }
55
56        //check permissions
57        $ACT = act_permcheck($ACT);
58
59        //register
60        $nil = array();
61        if($ACT == 'register' && $_POST['save'] && register()){
62            $ACT = 'login';
63        }
64
65        if ($ACT == 'resendpwd' && act_resendpwd()) {
66            $ACT = 'login';
67        }
68
69        //update user profile
70        if ($ACT == 'profile') {
71            if(!$_SERVER['REMOTE_USER']) {
72                $ACT = 'login';
73            } else {
74                if(updateprofile()) {
75                    msg($lang['profchanged'],1);
76                    $ACT = 'show';
77                }
78            }
79        }
80
81        //revert
82        if($ACT == 'revert'){
83            if(checkSecurityToken()){
84                $ACT = act_revert($ACT);
85            }else{
86                $ACT = 'show';
87            }
88        }
89
90        //save
91        if($ACT == 'save'){
92            if(checkSecurityToken()){
93                $ACT = act_save($ACT);
94            }else{
95                $ACT = 'show';
96            }
97        }
98
99        //cancel conflicting edit
100        if($ACT == 'cancel')
101            $ACT = 'show';
102
103        //draft deletion
104        if($ACT == 'draftdel')
105            $ACT = act_draftdel($ACT);
106
107        //draft saving on preview
108        if($ACT == 'preview')
109            $ACT = act_draftsave($ACT);
110
111        //edit
112        if(($ACT == 'edit' || $ACT == 'preview' || $ACT == 'recover') && $INFO['editable']){
113            $ACT = act_edit($ACT);
114        }else{
115            unlock($ID); //try to unlock
116        }
117
118        //handle export
119        if(substr($ACT,0,7) == 'export_')
120            $ACT = act_export($ACT);
121
122        //display some infos
123        if($ACT == 'check'){
124            check();
125            $ACT = 'show';
126        }
127
128        //handle admin tasks
129        if($ACT == 'admin'){
130            // retrieve admin plugin name from $_REQUEST['page']
131            if (!empty($_REQUEST['page'])) {
132                $pluginlist = plugin_list('admin');
133                if (in_array($_REQUEST['page'], $pluginlist)) {
134                    // attempt to load the plugin
135                    if ($plugin =& plugin_load('admin',$_REQUEST['page']) !== null)
136                        $plugin->handle();
137                }
138            }
139        }
140
141        // check permissions again - the action may have changed
142        $ACT = act_permcheck($ACT);
143    }  // end event ACTION_ACT_PREPROCESS default action
144    $evt->advise_after();
145    unset($evt);
146
147    // when action 'show', the intial not 'show' and POST, do a redirect
148    if($ACT == 'show' && $preact != 'show' && strtolower($_SERVER['REQUEST_METHOD']) == 'post'){
149        act_redirect($ID,$preact);
150    }
151
152    //call template FIXME: all needed vars available?
153    $headers[] = 'Content-Type: text/html; charset=utf-8';
154    trigger_event('ACTION_HEADERS_SEND',$headers,'act_sendheaders');
155
156    include(template('main.php'));
157    // output for the commands is now handled in inc/templates.php
158    // in function tpl_content()
159}
160
161function act_sendheaders($headers) {
162    foreach ($headers as $hdr) header($hdr);
163}
164
165/**
166 * Sanitize the action command
167 *
168 * Add all allowed commands here.
169 *
170 * @author Andreas Gohr <andi@splitbrain.org>
171 */
172function act_clean($act){
173    global $lang;
174    global $conf;
175
176    // check if the action was given as array key
177    if(is_array($act)){
178        list($act) = array_keys($act);
179    }
180
181    //remove all bad chars
182    $act = strtolower($act);
183    $act = preg_replace('/[^1-9a-z_]+/','',$act);
184
185    if($act == 'export_html') $act = 'export_xhtml';
186    if($act == 'export_htmlbody') $act = 'export_xhtmlbody';
187
188    // check if action is disabled
189    if(!actionOK($act)){
190        msg('Command disabled: '.htmlspecialchars($act),-1);
191        return 'show';
192    }
193
194    //disable all acl related commands if ACL is disabled
195    if(!$conf['useacl'] && in_array($act,array('login','logout','register','admin',
196                    'subscribe','unsubscribe','profile','revert',
197                    'resendpwd','subscribens','unsubscribens',))){
198        msg('Command unavailable: '.htmlspecialchars($act),-1);
199        return 'show';
200    }
201
202    if(!in_array($act,array('login','logout','register','save','cancel','edit','draft',
203                    'preview','search','show','check','index','revisions',
204                    'diff','recent','backlink','admin','subscribe','revert',
205                    'unsubscribe','profile','resendpwd','recover',
206                    'draftdel','subscribens','unsubscribens',)) && substr($act,0,7) != 'export_' ) {
207        msg('Command unknown: '.htmlspecialchars($act),-1);
208        return 'show';
209    }
210    return $act;
211}
212
213/**
214 * Run permissionchecks
215 *
216 * @author Andreas Gohr <andi@splitbrain.org>
217 */
218function act_permcheck($act){
219    global $INFO;
220    global $conf;
221
222    if(in_array($act,array('save','preview','edit','recover'))){
223        if($INFO['exists']){
224            if($act == 'edit'){
225                //the edit function will check again and do a source show
226                //when no AUTH_EDIT available
227                $permneed = AUTH_READ;
228            }else{
229                $permneed = AUTH_EDIT;
230            }
231        }else{
232            $permneed = AUTH_CREATE;
233        }
234    }elseif(in_array($act,array('login','search','recent','profile'))){
235        $permneed = AUTH_NONE;
236    }elseif($act == 'revert'){
237        $permneed = AUTH_ADMIN;
238        if($INFO['ismanager']) $permneed = AUTH_EDIT;
239    }elseif($act == 'register'){
240        $permneed = AUTH_NONE;
241    }elseif($act == 'resendpwd'){
242        $permneed = AUTH_NONE;
243    }elseif($act == 'admin'){
244        if($INFO['ismanager']){
245            // if the manager has the needed permissions for a certain admin
246            // action is checked later
247            $permneed = AUTH_READ;
248        }else{
249            $permneed = AUTH_ADMIN;
250        }
251    }else{
252        $permneed = AUTH_READ;
253    }
254    if($INFO['perm'] >= $permneed) return $act;
255
256    return 'denied';
257}
258
259/**
260 * Handle 'draftdel'
261 *
262 * Deletes the draft for the current page and user
263 */
264function act_draftdel($act){
265    global $INFO;
266    @unlink($INFO['draft']);
267    $INFO['draft'] = null;
268    return 'show';
269}
270
271/**
272 * Saves a draft on preview
273 *
274 * @todo this currently duplicates code from ajax.php :-/
275 */
276function act_draftsave($act){
277    global $INFO;
278    global $ID;
279    global $conf;
280    if($conf['usedraft'] && $_POST['wikitext']){
281        $draft = array('id'     => $ID,
282                'prefix' => $_POST['prefix'],
283                'text'   => $_POST['wikitext'],
284                'suffix' => $_POST['suffix'],
285                'date'   => $_POST['date'],
286                'client' => $INFO['client'],
287                );
288        $cname = getCacheName($draft['client'].$ID,'.draft');
289        if(io_saveFile($cname,serialize($draft))){
290            $INFO['draft'] = $cname;
291        }
292    }
293    return $act;
294}
295
296/**
297 * Handle 'save'
298 *
299 * Checks for spam and conflicts and saves the page.
300 * Does a redirect to show the page afterwards or
301 * returns a new action.
302 *
303 * @author Andreas Gohr <andi@splitbrain.org>
304 */
305function act_save($act){
306    global $ID;
307    global $DATE;
308    global $PRE;
309    global $TEXT;
310    global $SUF;
311    global $SUM;
312    global $lang;
313    global $INFO;
314
315    //spam check
316    if(checkwordblock()) {
317        msg($lang['wordblock'], -1);
318        return 'edit';
319    }
320    //conflict check
321    if($DATE != 0 && $INFO['meta']['date']['modified'] > $DATE )
322        return 'conflict';
323
324    //save it
325    saveWikiText($ID,con($PRE,$TEXT,$SUF,1),$SUM,$_REQUEST['minor']); //use pretty mode for con
326    //unlock it
327    unlock($ID);
328
329    //delete draft
330    act_draftdel($act);
331    session_write_close();
332
333    // when done, show page
334    return 'show';
335}
336
337/**
338 * Revert to a certain revision
339 *
340 * @author Andreas Gohr <andi@splitbrain.org>
341 */
342function act_revert($act){
343    global $ID;
344    global $REV;
345    global $lang;
346
347    // when no revision is given, delete current one
348    // FIXME this feature is not exposed in the GUI currently
349    $text = '';
350    $sum  = $lang['deleted'];
351    if($REV){
352        $text = rawWiki($ID,$REV);
353        if(!$text) return 'show'; //something went wrong
354        $sum  = $lang['restored'];
355    }
356
357    // spam check
358
359    if (checkwordblock($text)) {
360        msg($lang['wordblock'], -1);
361        return 'edit';
362    }
363
364    saveWikiText($ID,$text,$sum,false);
365    msg($sum,1);
366
367    //delete any draft
368    act_draftdel($act);
369    session_write_close();
370
371    // when done, show current page
372    $_SERVER['REQUEST_METHOD'] = 'post'; //should force a redirect
373    $REV = '';
374    return 'show';
375}
376
377/**
378 * Do a redirect after receiving post data
379 *
380 * Tries to add the section id as hash mark after section editing
381 */
382function act_redirect($id,$preact){
383    global $PRE;
384    global $TEXT;
385    global $MSG;
386
387    //are there any undisplayed messages? keep them in session for display
388    //on the next page
389    if(isset($MSG) && count($MSG)){
390        //reopen session, store data and close session again
391        @session_start();
392        $_SESSION[DOKU_COOKIE]['msg'] = $MSG;
393        session_write_close();
394    }
395
396    $opts = array(
397            'id'       => $id,
398            'preact'   => $preact
399            );
400    //get section name when coming from section edit
401    if($PRE && preg_match('/^\s*==+([^=\n]+)/',$TEXT,$match)){
402        $check = false; //Byref
403        $opts['fragment'] = sectionID($match[0], $check);
404    }
405
406    trigger_event('ACTION_SHOW_REDIRECT',$opts,'act_redirect_execute');
407}
408
409function act_redirect_execute($opts){
410    $go = wl($opts['id'],'',true);
411    if(isset($opts['fragment'])) $go .= '#'.$opts['fragment'];
412
413    //show it
414    send_redirect($go);
415}
416
417/**
418 * Handle 'login', 'logout'
419 *
420 * @author Andreas Gohr <andi@splitbrain.org>
421 */
422function act_auth($act){
423    global $ID;
424    global $INFO;
425
426    //already logged in?
427    if(isset($_SERVER['REMOTE_USER']) && $act=='login'){
428        return 'show';
429    }
430
431    //handle logout
432    if($act=='logout'){
433        $lockedby = checklock($ID); //page still locked?
434        if($lockedby == $_SERVER['REMOTE_USER'])
435            unlock($ID); //try to unlock
436
437        // do the logout stuff
438        auth_logoff();
439
440        // rebuild info array
441        $INFO = pageinfo();
442
443        act_redirect($ID,'login');
444    }
445
446    return $act;
447}
448
449/**
450 * Handle 'edit', 'preview', 'recover'
451 *
452 * @author Andreas Gohr <andi@splitbrain.org>
453 */
454function act_edit($act){
455    global $ID;
456    global $INFO;
457
458    global $TEXT;
459    global $RANGE;
460    global $PRE;
461    global $SUF;
462    global $REV;
463    global $SUM;
464    global $lang;
465    global $DATE;
466
467    if (!isset($TEXT)) {
468        if ($INFO['exists']) {
469            if ($RANGE) {
470                list($PRE,$TEXT,$SUF) = rawWikiSlices($RANGE,$ID,$REV);
471            } else {
472                $TEXT = rawWiki($ID,$REV);
473            }
474        } else {
475            $TEXT = pageTemplate($ID);
476        }
477    }
478
479    //set summary default
480    if(!$SUM){
481        if($REV){
482            $SUM = $lang['restored'];
483        }elseif(!$INFO['exists']){
484            $SUM = $lang['created'];
485        }
486    }
487
488    // Use the date of the newest revision, not of the revision we edit
489    // This is used for conflict detection
490    if(!$DATE) $DATE = $INFO['meta']['date']['modified'];
491
492    //check if locked by anyone - if not lock for my self
493    $lockedby = checklock($ID);
494    if($lockedby) return 'locked';
495
496    lock($ID);
497    return $act;
498}
499
500/**
501 * Export a wiki page for various formats
502 *
503 * Triggers ACTION_EXPORT_POSTPROCESS
504 *
505 *  Event data:
506 *    data['id']      -- page id
507 *    data['mode']    -- requested export mode
508 *    data['headers'] -- export headers
509 *    data['output']  -- export output
510 *
511 * @author Andreas Gohr <andi@splitbrain.org>
512 * @author Michael Klier <chi@chimeric.de>
513 */
514function act_export($act){
515    global $ID;
516    global $REV;
517    global $conf;
518    global $lang;
519
520    $pre = '';
521    $post = '';
522    $output = '';
523    $headers = array();
524
525    // search engines: never cache exported docs! (Google only currently)
526    $headers['X-Robots-Tag'] = 'noindex';
527
528    $mode = substr($act,7);
529    switch($mode) {
530        case 'raw':
531            $headers['Content-Type'] = 'text/plain; charset=utf-8';
532            $headers['Content-Disposition'] = 'attachment; filename='.noNS($ID).'.txt';
533            $output = rawWiki($ID,$REV);
534            break;
535        case 'xhtml':
536            $pre .= '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"' . DOKU_LF;
537            $pre .= ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' . DOKU_LF;
538            $pre .= '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="'.$conf['lang'].'"' . DOKU_LF;
539            $pre .= ' lang="'.$conf['lang'].'" dir="'.$lang['direction'].'">' . DOKU_LF;
540            $pre .= '<head>' . DOKU_LF;
541            $pre .= '  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />' . DOKU_LF;
542            $pre .= '  <title>'.$ID.'</title>' . DOKU_LF;
543
544            // get metaheaders
545            ob_start();
546            tpl_metaheaders();
547            $pre .= ob_get_clean();
548
549            $pre .= '</head>' . DOKU_LF;
550            $pre .= '<body>' . DOKU_LF;
551            $pre .= '<div class="dokuwiki export">' . DOKU_LF;
552
553            // get toc
554            $pre .= tpl_toc(true);
555
556            $headers['Content-Type'] = 'text/html; charset=utf-8';
557            $output = p_wiki_xhtml($ID,$REV,false);
558
559            $post .= '</div>' . DOKU_LF;
560            $post .= '</body>' . DOKU_LF;
561            $post .= '</html>' . DOKU_LF;
562            break;
563        case 'xhtmlbody':
564            $headers['Content-Type'] = 'text/html; charset=utf-8';
565            $output = p_wiki_xhtml($ID,$REV,false);
566            break;
567        default:
568            $output = p_cached_output(wikiFN($ID,$REV), $mode);
569            $headers = p_get_metadata($ID,"format $mode");
570            break;
571    }
572
573    // prepare event data
574    $data = array();
575    $data['id'] = $ID;
576    $data['mode'] = $mode;
577    $data['headers'] = $headers;
578    $data['output'] =& $output;
579
580    trigger_event('ACTION_EXPORT_POSTPROCESS', $data);
581
582    if(!empty($data['output'])){
583        if(is_array($data['headers'])) foreach($data['headers'] as $key => $val){
584            header("$key: $val");
585        }
586        print $pre.$data['output'].$post;
587        exit;
588    }
589    return 'show';
590}
591
592/**
593 * Handle page 'subscribe'
594 *
595 * Throws exception on error.
596 *
597 * @author Adrian Lang <lang@cosmocode.de>
598 */
599function act_subscription($act){
600    global $lang;
601    global $INFO;
602    global $ID;
603
604    // get and preprocess data.
605    $params = array();
606    foreach(array('target', 'style', 'action') as $param) {
607        if (isset($_REQUEST["sub_$param"])) {
608            $params[$param] = $_REQUEST["sub_$param"];
609        }
610    }
611
612    // any action given? if not just return and show the subscription page
613    if(!$params['action'] || !checkSecurityToken()) return $act;
614
615    // Handle POST data, may throw exception.
616    trigger_event('ACTION_HANDLE_SUBSCRIBE', $params, 'subscription_handle_post');
617
618    $target = $params['target'];
619    $style  = $params['style'];
620    $data   = $params['data'];
621    $action = $params['action'];
622
623    // Perform action.
624    if (!subscription_set($_SERVER['REMOTE_USER'], $target, $style, $data)) {
625        throw new Exception(sprintf($lang["subscr_{$action}_error"],
626                                    hsc($INFO['userinfo']['name']),
627                                    prettyprint_id($target)));
628    }
629    msg(sprintf($lang["subscr_{$action}_success"], hsc($INFO['userinfo']['name']),
630                prettyprint_id($target)), 1);
631    act_redirect($ID, $act);
632
633    // Assure that we have valid data if act_redirect somehow fails.
634    $INFO['subscribed'] = get_info_subscribed();
635    return 'show';
636}
637
638/**
639 * Validate POST data
640 *
641 * Validates POST data for a subscribe or unsubscribe request. This is the
642 * default action for the event ACTION_HANDLE_SUBSCRIBE.
643 *
644 * @author Adrian Lang <lang@cosmocode.de>
645 */
646function subscription_handle_post(&$params) {
647    global $INFO;
648    global $lang;
649
650    // Get and validate parameters.
651    if (!isset($params['target'])) {
652        throw new Exception('no subscription target given');
653    }
654    $target = $params['target'];
655    $valid_styles = array('every', 'digest');
656    if (substr($target, -1, 1) === ':') {
657        // Allow “list” subscribe style since the target is a namespace.
658        $valid_styles[] = 'list';
659    }
660    $style  = valid_input_set('style', $valid_styles, $params,
661                              'invalid subscription style given');
662    $action = valid_input_set('action', array('subscribe', 'unsubscribe'),
663                              $params, 'invalid subscription action given');
664
665    // Check other conditions.
666    if ($action === 'subscribe') {
667        if ($INFO['userinfo']['mail'] === '') {
668            throw new Exception($lang['subscr_subscribe_noaddress']);
669        }
670    } elseif ($action === 'unsubscribe') {
671        $is = false;
672        foreach($INFO['subscribed'] as $subscr) {
673            if ($subscr['target'] === $target) {
674                $is = true;
675            }
676        }
677        if ($is === false) {
678            throw new Exception(sprintf($lang['subscr_not_subscribed'],
679                                        $_SERVER['REMOTE_USER'],
680                                        prettyprint_id($target)));
681        }
682        // subscription_set deletes a subscription if style = null.
683        $style = null;
684    }
685
686    $data = in_array($style, array('list', 'digest')) ? time() : null;
687    $params = compact('target', 'style', 'data', 'action');
688}
689
690//Setup VIM: ex: et ts=2 enc=utf-8 :
691