skip merges
[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(-httponly => 1, -secure => 1));
18         } else {
19                 print $session->header(-charset => 'utf-8',
20                         -cookie => $session->cookie(-httponly => 1));
21         }
22 }
23
24 sub showform ($$$$;@) {
25         my $form=shift;
26         my $buttons=shift;
27         my $session=shift;
28         my $cgi=shift;
29
30         if (exists $hooks{formbuilder}) {
31                 run_hooks(formbuilder => sub {
32                         shift->(form => $form, cgi => $cgi, session => $session,
33                                 buttons => $buttons);
34                 });
35         }
36
37         printheader($session);
38         print misctemplate($form->title, $form->render(submit => $buttons), @_);
39 }
40
41 sub redirect ($$) {
42         my $q=shift;
43         my $url=shift;
44         if (! $config{w3mmode}) {
45                 print $q->redirect($url);
46         }
47         else {
48                 print "Content-type: text/plain\n";
49                 print "W3m-control: GOTO $url\n\n";
50         }
51 }
52
53 sub decode_cgi_utf8 ($) {
54         # decode_form_utf8 method is needed for 5.10
55         if ($] < 5.01) {
56                 my $cgi = shift;
57                 foreach my $f ($cgi->param) {
58                         $cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
59                 }
60         }
61 }
62
63 sub decode_form_utf8 ($) {
64         if ($] >= 5.01) {
65                 my $form = shift;
66                 foreach my $f ($form->field) {
67                         $form->field(name  => $f,
68                                      value => decode_utf8($form->field($f)),
69                                      force => 1,
70                         );
71                 }
72         }
73 }
74
75 # Check if the user is signed in. If not, redirect to the signin form and
76 # save their place to return to later.
77 sub needsignin ($$) {
78         my $q=shift;
79         my $session=shift;
80
81         if (! defined $session->param("name") ||
82             ! userinfo_get($session->param("name"), "regdate")) {
83                 $session->param(postsignin => $ENV{QUERY_STRING});
84                 cgi_signin($q, $session);
85                 cgi_savesession($session);
86                 exit;
87         }
88 }
89
90 sub cgi_signin ($$) {
91         my $q=shift;
92         my $session=shift;
93
94         decode_cgi_utf8($q);
95         eval q{use CGI::FormBuilder};
96         error($@) if $@;
97         my $form = CGI::FormBuilder->new(
98                 title => "signin",
99                 name => "signin",
100                 charset => "utf-8",
101                 method => 'POST',
102                 required => 'NONE',
103                 javascript => 0,
104                 params => $q,
105                 action => $config{cgiurl},
106                 header => 0,
107                 template => {type => 'div'},
108                 stylesheet => baseurl()."style.css",
109         );
110         my $buttons=["Login"];
111         
112         if ($q->param("do") ne "signin" && !$form->submitted) {
113                 $form->text(gettext("You need to log in first."));
114         }
115         $form->field(name => "do", type => "hidden", value => "signin",
116                 force => 1);
117         
118         decode_form_utf8($form);
119         run_hooks(formbuilder_setup => sub {
120                 shift->(form => $form, cgi => $q, session => $session,
121                         buttons => $buttons);
122         });
123         decode_form_utf8($form);
124
125         if ($form->submitted) {
126                 $form->validate;
127         }
128
129         showform($form, $buttons, $session, $q);
130 }
131
132 sub cgi_postsignin ($$) {
133         my $q=shift;
134         my $session=shift;
135         
136         # Continue with whatever was being done before the signin process.
137         if (defined $session->param("postsignin")) {
138                 my $postsignin=CGI->new($session->param("postsignin"));
139                 $session->clear("postsignin");
140                 cgi($postsignin, $session);
141                 cgi_savesession($session);
142                 exit;
143         }
144         else {
145                 if ($config{sslcookie} && ! $q->https()) {
146                         error(gettext("probable misconfiguration: sslcookie is set, but you are attempting to login via http, not https"));
147                 }
148                 else {
149                         error(gettext("login failed, perhaps you need to turn on cookies?"));
150                 }
151         }
152 }
153
154 sub cgi_prefs ($$) {
155         my $q=shift;
156         my $session=shift;
157
158         needsignin($q, $session);
159         decode_cgi_utf8($q);
160         
161         # The session id is stored on the form and checked to
162         # guard against CSRF.
163         my $sid=$q->param('sid');
164         if (! defined $sid) {
165                 $q->delete_all;
166         }
167         elsif ($sid ne $session->id) {
168                 error(gettext("Your login session has expired."));
169         }
170
171         eval q{use CGI::FormBuilder};
172         error($@) if $@;
173         my $form = CGI::FormBuilder->new(
174                 title => "preferences",
175                 name => "preferences",
176                 header => 0,
177                 charset => "utf-8",
178                 method => 'POST',
179                 validate => {
180                         email => 'EMAIL',
181                 },
182                 required => 'NONE',
183                 javascript => 0,
184                 params => $q,
185                 action => $config{cgiurl},
186                 template => {type => 'div'},
187                 stylesheet => baseurl()."style.css",
188                 fieldsets => [
189                         [login => gettext("Login")],
190                         [preferences => gettext("Preferences")],
191                         [admin => gettext("Admin")]
192                 ],
193         );
194         my $buttons=["Save Preferences", "Logout", "Cancel"];
195         
196         decode_form_utf8($form);
197         run_hooks(formbuilder_setup => sub {
198                 shift->(form => $form, cgi => $q, session => $session,
199                         buttons => $buttons);
200         });
201         decode_form_utf8($form);
202         
203         $form->field(name => "do", type => "hidden", value => "prefs",
204                 force => 1);
205         $form->field(name => "sid", type => "hidden", value => $session->id,
206                 force => 1);
207         $form->field(name => "email", size => 50, fieldset => "preferences");
208         
209         my $user_name=$session->param("name");
210
211         if (! $form->submitted) {
212                 $form->field(name => "email", force => 1,
213                         value => userinfo_get($user_name, "email"));
214         }
215         
216         if ($form->submitted eq 'Logout') {
217                 $session->delete();
218                 redirect($q, $config{url});
219                 return;
220         }
221         elsif ($form->submitted eq 'Cancel') {
222                 redirect($q, $config{url});
223                 return;
224         }
225         elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
226                 if (defined $form->field('email')) {
227                         userinfo_set($user_name, 'email', $form->field('email')) ||
228                                 error("failed to set email");
229                 }
230
231                 $form->text(gettext("Preferences saved."));
232         }
233         
234         showform($form, $buttons, $session, $q);
235 }
236
237 sub cgi_custom_failure ($$) {
238         my $header=shift;
239         my $message=shift;
240
241         print $header;
242         print $message;
243
244         # Internet Explod^Hrer won't show custom 404 responses
245         # unless they're >= 512 bytes
246         print ' ' x 512;
247
248         exit;
249 }
250
251 sub check_banned ($$) {
252         my $q=shift;
253         my $session=shift;
254
255         my $banned=0;
256         my $name=$session->param("name");
257         if (defined $name && 
258             grep { $name eq $_ } @{$config{banned_users}}) {
259                 $banned=1;
260         }
261
262         foreach my $b (@{$config{banned_users}}) {
263                 if (pagespec_match("", $b,
264                         ip => $ENV{REMOTE_ADDR},
265                         name => defined $name ? $name : "",
266                 )) {
267                         $banned=1;
268                         last;
269                 }
270         }
271
272         if ($banned) {
273                 $session->delete();
274                 cgi_savesession($session);
275                 cgi_custom_failure(
276                         $q->header(-status => "403 Forbidden"),
277                         gettext("You are banned."));
278         }
279 }
280
281 sub cgi_getsession ($) {
282         my $q=shift;
283
284         eval q{use CGI::Session; use HTML::Entities};
285         error($@) if $@;
286         CGI::Session->name("ikiwiki_session_".encode_entities($config{wikiname}));
287         
288         my $oldmask=umask(077);
289         my $session = eval {
290                 CGI::Session->new("driver:DB_File", $q,
291                         { FileName => "$config{wikistatedir}/sessions.db" })
292         };
293         if (! $session || $@) {
294                 error($@." ".CGI::Session->errstr());
295         }
296         
297         umask($oldmask);
298
299         return $session;
300 }
301
302 # To guard against CSRF, the user's session id (sid)
303 # can be stored on a form. This function will check
304 # (for logged in users) that the sid on the form matches
305 # the session id in the cookie.
306 sub checksessionexpiry ($$) {
307         my $q=shift;
308         my $session = shift;
309
310         if (defined $session->param("name")) {
311                 my $sid=$q->param('sid');
312                 if (! defined $sid || $sid ne $session->id) {
313                         error(gettext("Your login session has expired."));
314                 }
315         }
316 }
317
318 sub cgi_savesession ($) {
319         my $session=shift;
320
321         # Force session flush with safe umask.
322         my $oldmask=umask(077);
323         $session->flush;
324         umask($oldmask);
325 }
326
327 sub cgi (;$$) {
328         my $q=shift;
329         my $session=shift;
330
331         eval q{use CGI};
332         error($@) if $@;
333         $CGI::DISABLE_UPLOADS=$config{cgi_disable_uploads};
334
335         if (! $q) {
336                 binmode(STDIN);
337                 $q=CGI->new;
338                 binmode(STDIN, ":utf8");
339         
340                 run_hooks(cgi => sub { shift->($q) });
341         }
342
343         my $do=$q->param('do');
344         if (! defined $do || ! length $do) {
345                 my $error = $q->cgi_error;
346                 if ($error) {
347                         error("Request not processed: $error");
348                 }
349                 else {
350                         error("\"do\" parameter missing");
351                 }
352         }
353
354         # Need to lock the wiki before getting a session.
355         lockwiki();
356         loadindex();
357         
358         if (! $session) {
359                 $session=cgi_getsession($q);
360         }
361         
362         # Auth hooks can sign a user in.
363         if ($do ne 'signin' && ! defined $session->param("name")) {
364                 run_hooks(auth => sub {
365                         shift->($q, $session)
366                 });
367                 if (defined $session->param("name")) {
368                         # Make sure whatever user was authed is in the
369                         # userinfo db.
370                         if (! userinfo_get($session->param("name"), "regdate")) {
371                                 userinfo_setall($session->param("name"), {
372                                         email => "",
373                                         password => "",
374                                         regdate => time,
375                                 }) || error("failed adding user");
376                         }
377                 }
378         }
379         
380         check_banned($q, $session);
381         
382         run_hooks(sessioncgi => sub { shift->($q, $session) });
383
384         if ($do eq 'signin') {
385                 cgi_signin($q, $session);
386                 cgi_savesession($session);
387         }
388         elsif ($do eq 'prefs') {
389                 cgi_prefs($q, $session);
390         }
391         elsif (defined $session->param("postsignin") || $do eq 'postsignin') {
392                 cgi_postsignin($q, $session);
393         }
394         else {
395                 error("unknown do parameter");
396         }
397 }
398
399 # Does not need to be called directly; all errors will go through here.
400 sub cgierror ($) {
401         my $message=shift;
402
403         print "Content-type: text/html\n\n";
404         print misctemplate(gettext("Error"),
405                 "<p class=\"error\">".gettext("Error").": $message</p>");
406         die $@;
407 }
408
409 1