add websetup to auto setup
[ikiwiki.git] / IkiWiki / CGI.pm
1 #!/usr/bin/perl
2
3 package IkiWiki;
4
5 use warnings;
6 use strict;
7 use IkiWiki;
8 use IkiWiki::UserInfo;
9 use open qw{:utf8 :std};
10 use Encode;
11
12 sub printheader ($) { #{{{
13         my $session=shift;
14         
15         if ($config{sslcookie}) {
16                 print $session->header(-charset => 'utf-8',
17                         -cookie => $session->cookie(-secure => 1));
18         } else {
19                 print $session->header(-charset => 'utf-8');
20         }
21 } #}}}
22
23 sub showform ($$$$;@) { #{{{
24         my $form=shift;
25         my $buttons=shift;
26         my $session=shift;
27         my $cgi=shift;
28
29         if (exists $hooks{formbuilder}) {
30                 run_hooks(formbuilder => sub {
31                         shift->(form => $form, cgi => $cgi, session => $session,
32                                 buttons => $buttons);
33                 });
34         }
35
36         printheader($session);
37         print misctemplate($form->title, $form->render(submit => $buttons), @_);
38 }
39
40 sub redirect ($$) { #{{{
41         my $q=shift;
42         my $url=shift;
43         if (! $config{w3mmode}) {
44                 print $q->redirect($url);
45         }
46         else {
47                 print "Content-type: text/plain\n";
48                 print "W3m-control: GOTO $url\n\n";
49         }
50 } #}}}
51
52 sub check_canedit ($$$;$) { #{{{
53         my $page=shift;
54         my $q=shift;
55         my $session=shift;
56         my $nonfatal=shift;
57         
58         my $canedit;
59         run_hooks(canedit => sub {
60                 return if defined $canedit;
61                 my $ret=shift->($page, $q, $session);
62                 if (defined $ret) {
63                         if ($ret eq "") {
64                                 $canedit=1;
65                         }
66                         elsif (ref $ret eq 'CODE') {
67                                 $ret->() unless $nonfatal;
68                                 $canedit=0;
69                         }
70                         elsif (defined $ret) {
71                                 error($ret) unless $nonfatal;
72                                 $canedit=0;
73                         }
74                 }
75         });
76         return $canedit;
77 } #}}}
78
79 sub decode_cgi_utf8 ($) { #{{{
80         # decode_form_utf8 method is needed for 5.10
81         if ($] < 5.01) {
82                 my $cgi = shift;
83                 foreach my $f ($cgi->param) {
84                         $cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
85                 }
86         }
87 } #}}}
88
89 sub decode_form_utf8 ($) { #{{{
90         if ($] >= 5.01) {
91                 my $form = shift;
92                 foreach my $f ($form->field) {
93                         $form->field(name  => $f,
94                                      value => decode_utf8($form->field($f)),
95                                      force => 1,
96                         );
97                 }
98         }
99 } #}}}
100
101 # Check if the user is signed in. If not, redirect to the signin form and
102 # save their place to return to later.
103 sub needsignin ($$) { #{{{
104         my $q=shift;
105         my $session=shift;
106
107         if (! defined $session->param("name") ||
108             ! userinfo_get($session->param("name"), "regdate")) {
109                 $session->param(postsignin => $ENV{QUERY_STRING});
110                 cgi_signin($q, $session);
111                 cgi_savesession($session);
112                 exit;
113         }
114 } #}}}  
115
116 sub cgi_signin ($$) { #{{{
117         my $q=shift;
118         my $session=shift;
119
120         decode_cgi_utf8($q);
121         eval q{use CGI::FormBuilder};
122         error($@) if $@;
123         my $form = CGI::FormBuilder->new(
124                 title => "signin",
125                 name => "signin",
126                 charset => "utf-8",
127                 method => 'POST',
128                 required => 'NONE',
129                 javascript => 0,
130                 params => $q,
131                 action => $config{cgiurl},
132                 header => 0,
133                 template => {type => 'div'},
134                 stylesheet => baseurl()."style.css",
135         );
136         my $buttons=["Login"];
137         
138         if ($q->param("do") ne "signin" && !$form->submitted) {
139                 $form->text(gettext("You need to log in first."));
140         }
141         $form->field(name => "do", type => "hidden", value => "signin",
142                 force => 1);
143         
144         decode_form_utf8($form);
145         run_hooks(formbuilder_setup => sub {
146                 shift->(form => $form, cgi => $q, session => $session,
147                         buttons => $buttons);
148         });
149         decode_form_utf8($form);
150
151         if ($form->submitted) {
152                 $form->validate;
153         }
154
155         showform($form, $buttons, $session, $q);
156 } #}}}
157
158 sub cgi_postsignin ($$) { #{{{
159         my $q=shift;
160         my $session=shift;
161         
162         # Continue with whatever was being done before the signin process.
163         if (defined $session->param("postsignin")) {
164                 my $postsignin=CGI->new($session->param("postsignin"));
165                 $session->clear("postsignin");
166                 cgi($postsignin, $session);
167                 cgi_savesession($session);
168                 exit;
169         }
170         else {
171                 error(gettext("login failed, perhaps you need to turn on cookies?"));
172         }
173 } #}}}
174
175 sub cgi_prefs ($$) { #{{{
176         my $q=shift;
177         my $session=shift;
178
179         needsignin($q, $session);
180         decode_cgi_utf8($q);
181         
182         # The session id is stored on the form and checked to
183         # guard against CSRF.
184         my $sid=$q->param('sid');
185         if (! defined $sid) {
186                 $q->delete_all;
187         }
188         elsif ($sid ne $session->id) {
189                 error(gettext("Your login session has expired."));
190         }
191
192         eval q{use CGI::FormBuilder};
193         error($@) if $@;
194         my $form = CGI::FormBuilder->new(
195                 title => "preferences",
196                 name => "preferences",
197                 header => 0,
198                 charset => "utf-8",
199                 method => 'POST',
200                 validate => {
201                         email => 'EMAIL',
202                 },
203                 required => 'NONE',
204                 javascript => 0,
205                 params => $q,
206                 action => $config{cgiurl},
207                 template => {type => 'div'},
208                 stylesheet => baseurl()."style.css",
209                 fieldsets => [
210                         [login => gettext("Login")],
211                         [preferences => gettext("Preferences")],
212                         [admin => gettext("Admin")]
213                 ],
214         );
215         my $buttons=["Save Preferences", "Logout", "Cancel"];
216         
217         decode_form_utf8($form);
218         run_hooks(formbuilder_setup => sub {
219                 shift->(form => $form, cgi => $q, session => $session,
220                         buttons => $buttons);
221         });
222         decode_form_utf8($form);
223         
224         $form->field(name => "do", type => "hidden", value => "prefs",
225                 force => 1);
226         $form->field(name => "sid", type => "hidden", value => $session->id,
227                 force => 1);
228         $form->field(name => "email", size => 50, fieldset => "preferences");
229         
230         my $user_name=$session->param("name");
231
232         # XXX deprecated, should be removed eventually
233         $form->field(name => "banned_users", size => 50, fieldset => "admin");
234         if (! is_admin($user_name)) {
235                 $form->field(name => "banned_users", type => "hidden");
236         }
237         if (! $form->submitted) {
238                 $form->field(name => "email", force => 1,
239                         value => userinfo_get($user_name, "email"));
240                 if (is_admin($user_name)) {
241                         my $value=join(" ", get_banned_users());
242                         if (length $value) {
243                                 $form->field(name => "banned_users", force => 1,
244                                         value => join(" ", get_banned_users()),
245                                         comment => "deprecated; please move to banned_users in setup file");
246                         }
247                         else {
248                                 $form->field(name => "banned_users", type => "hidden");
249                         }
250                 }
251         }
252         
253         if ($form->submitted eq 'Logout') {
254                 $session->delete();
255                 redirect($q, $config{url});
256                 return;
257         }
258         elsif ($form->submitted eq 'Cancel') {
259                 redirect($q, $config{url});
260                 return;
261         }
262         elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
263                 if (defined $form->field('email')) {
264                         userinfo_set($user_name, 'email', $form->field('email')) ||
265                                 error("failed to set email");
266                 }
267
268                 # XXX deprecated, should be removed eventually
269                 if (is_admin($user_name)) {
270                         set_banned_users(grep { ! is_admin($_) }
271                                         split(' ',
272                                                 $form->field("banned_users"))) ||
273                                 error("failed saving changes");
274                         if (! length $form->field("banned_users")) {
275                                 $form->field(name => "banned_users", type => "hidden");
276                         }
277                 }
278
279                 $form->text(gettext("Preferences saved."));
280         }
281         
282         showform($form, $buttons, $session, $q);
283 } #}}}
284
285 sub cgi_editpage ($$) { #{{{
286         my $q=shift;
287         my $session=shift;
288         
289         decode_cgi_utf8($q);
290
291         my @fields=qw(do rcsinfo subpage from page type editcontent comments);
292         my @buttons=("Save Page", "Preview", "Cancel");
293         eval q{use CGI::FormBuilder};
294         error($@) if $@;
295         my $form = CGI::FormBuilder->new(
296                 fields => \@fields,
297                 charset => "utf-8",
298                 method => 'POST',
299                 required => [qw{editcontent}],
300                 javascript => 0,
301                 params => $q,
302                 action => $config{cgiurl},
303                 header => 0,
304                 table => 0,
305                 template => scalar template_params("editpage.tmpl"),
306                 wikiname => $config{wikiname},
307         );
308         
309         decode_form_utf8($form);
310         run_hooks(formbuilder_setup => sub {
311                 shift->(form => $form, cgi => $q, session => $session,
312                         buttons => \@buttons);
313         });
314         decode_form_utf8($form);
315         
316         # This untaint is safe because we check file_pruned.
317         my $page=$form->field('page');
318         $page=possibly_foolish_untaint($page);
319         my $absolute=($page =~ s#^/+##);
320         if (! defined $page || ! length $page ||
321             file_pruned($page, $config{srcdir})) {
322                 error("bad page name");
323         }
324
325         my $baseurl=$config{url}."/".htmlpage($page);
326         
327         my $from;
328         if (defined $form->field('from')) {
329                 ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
330         }
331         
332         my $file;
333         my $type;
334         if (exists $pagesources{$page} && $form->field("do") ne "create") {
335                 $file=$pagesources{$page};
336                 $type=pagetype($file);
337                 if (! defined $type || $type=~/^_/) {
338                         error(sprintf(gettext("%s is not an editable page"), $page));
339                 }
340                 if (! $form->submitted) {
341                         $form->field(name => "rcsinfo",
342                                 value => rcs_prepedit($file), force => 1);
343                 }
344                 $form->field(name => "editcontent", validate => '/.*/');
345         }
346         else {
347                 $type=$form->param('type');
348                 if (defined $type && length $type && $hooks{htmlize}{$type}) {
349                         $type=possibly_foolish_untaint($type);
350                 }
351                 elsif (defined $from && exists $pagesources{$from}) {
352                         # favor the type of linking page
353                         $type=pagetype($pagesources{$from});
354                 }
355                 $type=$config{default_pageext} unless defined $type;
356                 $file=$page.".".$type;
357                 if (! $form->submitted) {
358                         $form->field(name => "rcsinfo", value => "", force => 1);
359                 }
360                 $form->field(name => "editcontent", validate => '/.+/');
361         }
362
363         $form->field(name => "do", type => 'hidden');
364         $form->field(name => "sid", type => "hidden", value => $session->id,
365                 force => 1);
366         $form->field(name => "from", type => 'hidden');
367         $form->field(name => "rcsinfo", type => 'hidden');
368         $form->field(name => "subpage", type => 'hidden');
369         $form->field(name => "page", value => $page, force => 1);
370         $form->field(name => "type", value => $type, force => 1);
371         $form->field(name => "comments", type => "text", size => 80);
372         $form->field(name => "editcontent", type => "textarea", rows => 20,
373                 cols => 80);
374         $form->tmpl_param("can_commit", $config{rcs});
375         $form->tmpl_param("indexlink", indexlink());
376         $form->tmpl_param("helponformattinglink",
377                 htmllink($page, $page, "ikiwiki/formatting",
378                         noimageinline => 1,
379                         linktext => "FormattingHelp"));
380         
381         if ($form->submitted eq "Cancel") {
382                 if ($form->field("do") eq "create" && defined $from) {
383                         redirect($q, "$config{url}/".htmlpage($from));
384                 }
385                 elsif ($form->field("do") eq "create") {
386                         redirect($q, $config{url});
387                 }
388                 else {
389                         redirect($q, "$config{url}/".htmlpage($page));
390                 }
391                 return;
392         }
393         elsif ($form->submitted eq "Preview") {
394                 my $new=not exists $pagesources{$page};
395                 if ($new) {
396                         # temporarily record its type
397                         $pagesources{$page}=$page.".".$type;
398                 }
399
400                 my $content=$form->field('editcontent');
401
402                 run_hooks(editcontent => sub {
403                         $content=shift->(
404                                 content => $content,
405                                 page => $page,
406                                 cgi => $q,
407                                 session => $session,
408                         );
409                 });
410                 my $preview=htmlize($page, $page, $type,
411                         linkify($page, $page,
412                         preprocess($page, $page,
413                         filter($page, $page, $content), 0, 1)));
414                 run_hooks(format => sub {
415                         $preview=shift->(
416                                 page => $page,
417                                 content => $preview,
418                         );
419                 });
420                 $form->tmpl_param("page_preview", $preview);
421         
422                 if ($new) {
423                         delete $pagesources{$page};
424                 }
425                 # previewing may have created files on disk
426                 saveindex();
427         }
428         elsif ($form->submitted eq "Save Page") {
429                 $form->tmpl_param("page_preview", "");
430         }
431         
432         if ($form->submitted ne "Save Page" || ! $form->validate) {
433                 if ($form->field("do") eq "create") {
434                         my @page_locs;
435                         my $best_loc;
436                         if (! defined $from || ! length $from ||
437                             $from ne $form->field('from') ||
438                             file_pruned($from, $config{srcdir}) ||
439                             $from=~/^\// || 
440                             $absolute ||
441                             $form->submitted eq "Preview") {
442                                 @page_locs=$best_loc=$page;
443                         }
444                         else {
445                                 my $dir=$from."/";
446                                 $dir=~s![^/]+/+$!!;
447                                 
448                                 if ((defined $form->field('subpage') && length $form->field('subpage')) ||
449                                     $page eq gettext('discussion')) {
450                                         $best_loc="$from/$page";
451                                 }
452                                 else {
453                                         $best_loc=$dir.$page;
454                                 }
455                                 
456                                 push @page_locs, $dir.$page;
457                                 push @page_locs, "$from/$page";
458                                 while (length $dir) {
459                                         $dir=~s![^/]+/+$!!;
460                                         push @page_locs, $dir.$page;
461                                 }
462                         
463                                 push @page_locs, "$config{userdir}/$page"
464                                         if length $config{userdir};
465                         }
466
467                         @page_locs = grep {
468                                 ! exists $pagecase{lc $_}
469                         } @page_locs;
470                         if (! @page_locs) {
471                                 # hmm, someone else made the page in the
472                                 # meantime?
473                                 if ($form->submitted eq "Preview") {
474                                         # let them go ahead with the edit
475                                         # and resolve the conflict at save
476                                         # time
477                                         @page_locs=$page;
478                                 }
479                                 else {
480                                         redirect($q, "$config{url}/".htmlpage($page));
481                                         return;
482                                 }
483                         }
484
485                         my @editable_locs = grep {
486                                 check_canedit($_, $q, $session, 1)
487                         } @page_locs;
488                         if (! @editable_locs) {
489                                 # let it throw an error this time
490                                 map { check_canedit($_, $q, $session) } @page_locs;
491                         }
492                         
493                         my @page_types;
494                         if (exists $hooks{htmlize}) {
495                                 @page_types=grep { !/^_/ }
496                                         keys %{$hooks{htmlize}};
497                         }
498                         
499                         $form->tmpl_param("page_select", 1);
500                         $form->field(name => "page", type => 'select',
501                                 options => [ map { [ $_, pagetitle($_, 1) ] } @editable_locs ],
502                                 value => $best_loc);
503                         $form->field(name => "type", type => 'select',
504                                 options => \@page_types);
505                         $form->title(sprintf(gettext("creating %s"), pagetitle($page)));
506                         
507                 }
508                 elsif ($form->field("do") eq "edit") {
509                         check_canedit($page, $q, $session);
510                         if (! defined $form->field('editcontent') || 
511                             ! length $form->field('editcontent')) {
512                                 my $content="";
513                                 if (exists $pagesources{$page}) {
514                                         $content=readfile(srcfile($pagesources{$page}));
515                                         $content=~s/\n/\r\n/g;
516                                 }
517                                 $form->field(name => "editcontent", value => $content,
518                                         force => 1);
519                         }
520                         $form->tmpl_param("page_select", 0);
521                         $form->field(name => "page", type => 'hidden');
522                         $form->field(name => "type", type => 'hidden');
523                         $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
524                 }
525                 
526                 showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
527         }
528         else {
529                 # save page
530                 check_canedit($page, $q, $session);
531         
532                 # The session id is stored on the form and checked to
533                 # guard against CSRF. But only if the user is logged in,
534                 # as anonok can allow anonymous edits.
535                 if (defined $session->param("name")) {
536                         my $sid=$q->param('sid');
537                         if (! defined $sid || $sid ne $session->id) {
538                                 error(gettext("Your login session has expired."));
539                         }
540                 }
541
542                 my $exists=-e "$config{srcdir}/$file";
543
544                 if ($form->field("do") ne "create" && ! $exists &&
545                     ! defined srcfile($file, 1)) {
546                         $form->tmpl_param("message", template("editpagegone.tmpl")->output);
547                         $form->field(name => "do", value => "create", force => 1);
548                         $form->tmpl_param("page_select", 0);
549                         $form->field(name => "page", type => 'hidden');
550                         $form->field(name => "type", type => 'hidden');
551                         $form->title(sprintf(gettext("editing %s"), $page));
552                         showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
553                         return;
554                 }
555                 elsif ($form->field("do") eq "create" && $exists) {
556                         $form->tmpl_param("message", template("editcreationconflict.tmpl")->output);
557                         $form->field(name => "do", value => "edit", force => 1);
558                         $form->tmpl_param("page_select", 0);
559                         $form->field(name => "page", type => 'hidden');
560                         $form->field(name => "type", type => 'hidden');
561                         $form->title(sprintf(gettext("editing %s"), $page));
562                         $form->field("editcontent", 
563                                 value => readfile("$config{srcdir}/$file").
564                                          "\n\n\n".$form->field("editcontent"),
565                                 force => 1);
566                         showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
567                         return;
568                 }
569                 
570                 my $content=$form->field('editcontent');
571                 run_hooks(editcontent => sub {
572                         $content=shift->(
573                                 content => $content,
574                                 page => $page,
575                                 cgi => $q,
576                                 session => $session,
577                         );
578                 });
579                 $content=~s/\r\n/\n/g;
580                 $content=~s/\r/\n/g;
581                 $content.="\n" if $content !~ /\n$/;
582
583                 $config{cgi}=0; # avoid cgi error message
584                 eval { writefile($file, $config{srcdir}, $content) };
585                 $config{cgi}=1;
586                 if ($@) {
587                         $form->field(name => "rcsinfo", value => rcs_prepedit($file),
588                                 force => 1);
589                         my $mtemplate=template("editfailedsave.tmpl");
590                         $mtemplate->param(error_message => $@);
591                         $form->tmpl_param("message", $mtemplate->output);
592                         $form->field("editcontent", value => $content, force => 1);
593                         $form->tmpl_param("page_select", 0);
594                         $form->field(name => "page", type => 'hidden');
595                         $form->field(name => "type", type => 'hidden');
596                         $form->title(sprintf(gettext("editing %s"), $page));
597                         showform($form, \@buttons, $session, $q,
598                                 forcebaseurl => $baseurl);
599                         return;
600                 }
601                 
602                 my $conflict;
603                 if ($config{rcs}) {
604                         my $message="";
605                         if (defined $form->field('comments') &&
606                             length $form->field('comments')) {
607                                 $message=$form->field('comments');
608                         }
609                         
610                         if (! $exists) {
611                                 rcs_add($file);
612                         }
613
614                         # Prevent deadlock with post-commit hook by
615                         # signaling to it that it should not try to
616                         # do anything.
617                         disable_commit_hook();
618                         $conflict=rcs_commit($file, $message,
619                                 $form->field("rcsinfo"),
620                                 $session->param("name"), $ENV{REMOTE_ADDR});
621                         enable_commit_hook();
622                         rcs_update();
623                 }
624                 
625                 # Refresh even if there was a conflict, since other changes
626                 # may have been committed while the post-commit hook was
627                 # disabled.
628                 require IkiWiki::Render;
629                 refresh();
630                 saveindex();
631
632                 if (defined $conflict) {
633                         $form->field(name => "rcsinfo", value => rcs_prepedit($file),
634                                 force => 1);
635                         $form->tmpl_param("message", template("editconflict.tmpl")->output);
636                         $form->field("editcontent", value => $conflict, force => 1);
637                         $form->field("do", "edit", force => 1);
638                         $form->tmpl_param("page_select", 0);
639                         $form->field(name => "page", type => 'hidden');
640                         $form->field(name => "type", type => 'hidden');
641                         $form->title(sprintf(gettext("editing %s"), $page));
642                         showform($form, \@buttons, $session, $q,
643                                 forcebaseurl => $baseurl);
644                         return;
645                 }
646                 else {
647                         # The trailing question mark tries to avoid broken
648                         # caches and get the most recent version of the page.
649                         redirect($q, "$config{url}/".htmlpage($page)."?updated");
650                 }
651         }
652 } #}}}
653         
654 sub check_banned ($$) { #{{{
655         my $q=shift;
656         my $session=shift;
657
658         my $name=$session->param("name");
659         if (defined $name) {
660                 # XXX banned in userinfo is deprecated, should be removed
661                 # eventually, and only banned_users be checked.
662                 if (userinfo_get($session->param("name"), "banned") ||
663                     grep { $name eq $_ } @{$config{banned_users}}) {
664                         print $q->header(-status => "403 Forbidden");
665                         $session->delete();
666                         print gettext("You are banned.");
667                         cgi_savesession($session);
668                         exit;
669                 }
670         }
671 }
672
673 sub cgi_getsession ($) { #{{{
674         my $q=shift;
675
676         eval q{use CGI::Session};
677         error($@) if $@;
678         CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
679         
680         my $oldmask=umask(077);
681         my $session = eval {
682                 CGI::Session->new("driver:DB_File", $q,
683                         { FileName => "$config{wikistatedir}/sessions.db" })
684         };
685         if (! $session || $@) {
686                 error($@." ".CGI::Session->errstr());
687         }
688         
689         umask($oldmask);
690
691         return $session;
692 } #}}}
693
694 sub cgi_savesession ($) { #{{{
695         my $session=shift;
696
697         # Force session flush with safe umask.
698         my $oldmask=umask(077);
699         $session->flush;
700         umask($oldmask);
701 } #}}}
702
703 sub cgi (;$$) { #{{{
704         my $q=shift;
705         my $session=shift;
706
707         eval q{use CGI};
708         error($@) if $@;
709         $CGI::DISABLE_UPLOADS=$config{cgi_disable_uploads};
710
711         if (! $q) {
712                 binmode(STDIN);
713                 $q=CGI->new;
714                 binmode(STDIN, ":utf8");
715         
716                 run_hooks(cgi => sub { shift->($q) });
717         }
718
719         my $do=$q->param('do');
720         if (! defined $do || ! length $do) {
721                 my $error = $q->cgi_error;
722                 if ($error) {
723                         error("Request not processed: $error");
724                 }
725                 else {
726                         error("\"do\" parameter missing");
727                 }
728         }
729         
730         # Need to lock the wiki before getting a session.
731         lockwiki();
732         loadindex();
733         
734         if (! $session) {
735                 $session=cgi_getsession($q);
736         }
737         
738         # Auth hooks can sign a user in.
739         if ($do ne 'signin' && ! defined $session->param("name")) {
740                 run_hooks(auth => sub {
741                         shift->($q, $session)
742                 });
743                 if (defined $session->param("name")) {
744                         # Make sure whatever user was authed is in the
745                         # userinfo db.
746                         if (! userinfo_get($session->param("name"), "regdate")) {
747                                 userinfo_setall($session->param("name"), {
748                                         email => "",
749                                         password => "",
750                                         regdate => time,
751                                 }) || error("failed adding user");
752                         }
753                 }
754         }
755         
756         check_banned($q, $session);
757         
758         run_hooks(sessioncgi => sub { shift->($q, $session) });
759
760         if ($do eq 'signin') {
761                 cgi_signin($q, $session);
762                 cgi_savesession($session);
763         }
764         elsif ($do eq 'prefs') {
765                 cgi_prefs($q, $session);
766         }
767         elsif ($do eq 'create' || $do eq 'edit') {
768                 cgi_editpage($q, $session);
769         }
770         elsif (defined $session->param("postsignin") || $do eq 'postsignin') {
771                 cgi_postsignin($q, $session);
772         }
773         else {
774                 error("unknown do parameter");
775         }
776 } #}}}
777
778 # Does not need tobe called directly; all errors will go through here.
779 sub cgierror ($) { #{{{
780         my $message=shift;
781
782         print "Content-type: text/html\n\n";
783         print misctemplate(gettext("Error"),
784                 "<p class=\"error\">".gettext("Error").": $message</p>");
785         die $@;
786 } #}}}
787
788 1