IkiWiki/CGI.pm

   1 #!/usr/bin/perl
   2
   3 use warnings;
   4 use strict;
   5 use IkiWiki;
   6 use IkiWiki::UserInfo;
   7 use open qw{:utf8 :std};
   8 use Encode;
   9
  10 package IkiWiki;
  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
  24 sub redirect ($$) { #{{{
  25         my $q=shift;
  26         my $url=shift;
  27         if (! $config{w3mmode}) {
  28                 print $q->redirect($url);
  29         }
  30         else {
  31                 print "Content-type: text/plain\n";
  32                 print "W3m-control: GOTO $url\n\n";
  33         }
  34 } #}}}
  35
  36 sub page_locked ($$;$) { #{{{
  37         my $page=shift;
  38         my $session=shift;
  39         my $nonfatal=shift;
  40
  41         my $user=$session->param("name");
  42         return if defined $user && is_admin($user);
  43
  44         foreach my $admin (@{$config{adminuser}}) {
  45                 my $locked_pages=userinfo_get($admin, "locked_pages");
  46                 if (pagespec_match($page, userinfo_get($admin, "locked_pages"))) {
  47                         return 1 if $nonfatal;
  48                         error(htmllink("", "", $page, 1)." is locked by ".
  49                               htmllink("", "", $admin, 1)." and cannot be edited.");
  50                 }
  51         }
  52
  53         return 0;
  54 } #}}}
  55
  56 sub decode_form_utf8 ($) { #{{{
  57         my $form = shift;
  58         foreach my $f ($form->field) {
  59                 next if Encode::is_utf8(scalar $form->field($f));
  60                 $form->field(name  => $f,
  61                              value => decode_utf8($form->field($f)),
  62                              force => 1,
  63                             );
  64         }
  65 } #}}}
  66
  67 sub cgi_recentchanges ($) { #{{{
  68         my $q=shift;
  69
  70         # Optimisation: building recentchanges means calculating lots of
  71         # links. Memoizing htmllink speeds it up a lot (can't be memoized
  72         # during page builds as the return values may change, but they
  73         # won't here.)
  74         eval q{use Memoize};
  75         error($@) if $@;
  76         memoize("htmllink");
  77
  78         eval q{use Time::Duration};
  79         error($@) if $@;
  80         eval q{use CGI 'escapeHTML'};
  81         error($@) if $@;
  82
  83         my $changelog=[rcs_recentchanges(100)];
  84         foreach my $change (@$changelog) {
  85                 $change->{when} = concise(ago($change->{when}));
  86
  87                 if ($change->{user} =~ m!^https?://! &&
  88                     eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
  89                         # Munge user-urls, as used by eg, OpenID.
  90                         my $oid=Net::OpenID::VerifiedIdentity->new(identity => $change->{user});
  91                         $change->{user} = "<a href=\"".$change->{user}."\">".escapeHTML($oid->display)."</a>";
  92                 }
  93                 else {
  94                         $change->{user} = htmllink("", "", escapeHTML($change->{user}), 1);
  95                 }
  96
  97                 my $is_excess = exists $change->{pages}[10]; # limit pages to first 10
  98                 delete @{$change->{pages}}[10 .. @{$change->{pages}}] if $is_excess;
  99                 $change->{pages} = [
 100                         map {
 101                                 $_->{link} = htmllink("", "", $_->{page}, 1);
 102                                 $_;
 103                         } @{$change->{pages}}
 104                 ];
 105                 push @{$change->{pages}}, { link => '...' } if $is_excess;
 106         }
 107
 108         my $template=template("recentchanges.tmpl");
 109         $template->param(
 110                 title => "RecentChanges",
 111                 indexlink => indexlink(),
 112                 wikiname => $config{wikiname},
 113                 changelog => $changelog,
 114                 baseurl => baseurl(),
 115         );
 116         run_hooks(pagetemplate => sub {
 117                 shift->(page => "", destpage => "", template => $template);
 118         });
 119         print $q->header(-charset => 'utf-8'), $template->output;
 120 } #}}}
 121
 122 sub cgi_signin ($$) { #{{{
 123         my $q=shift;
 124         my $session=shift;
 125
 126         eval q{use CGI::FormBuilder};
 127         error($@) if $@;
 128         my $form = CGI::FormBuilder->new(
 129                 title => "signin",
 130                 fields => [qw(do name password openid_url)],
 131                 header => 1,
 132                 charset => "utf-8",
 133                 method => 'POST',
 134                 validate => {
 135                         confirm_password => {
 136                                 perl => q{eq $form->field("password")},
 137                         },
 138                         email => 'EMAIL',
 139                 },
 140                 required => 'NONE',
 141                 javascript => 0,
 142                 params => $q,
 143                 action => $config{cgiurl},
 144                 header => 0,
 145                 template => (-e "$config{templatedir}/signin.tmpl" ?
 146                              {template_params("signin.tmpl")} : ""),
 147                 stylesheet => baseurl()."style.css",
 148         );
 149
 150         decode_form_utf8($form);
 151
 152         $form->field(name => "name", required => 0, size => 30);
 153         $form->field(name => "do", type => "hidden");
 154         $form->field(name => "password", type => "password", required => 0);
 155         if ($config{openid}) {
 156                 $form->field(name => "openid_url", label => "OpenID", size => 30,
 157                         comment => '('.
 158                                 htmllink("", "", "OpenID", 1, 0, "What's this?")
 159                                 .($config{openidsignup} ? " | <a href=\"$config{openidsignup}\">Get an OpenID</a>" : "")
 160                                 .')');
 161         }
 162         else {
 163                 $form->field(name => "openid_url", type => "hidden");
 164         }
 165         if ($form->submitted eq "Register" || $form->submitted eq "Create Account") {
 166                 $form->title("register");
 167                 $form->text("");
 168                 $form->fields(qw(do name password confirm_password email));
 169                 $form->field(name => "confirm_password", type => "password");
 170                 $form->field(name => "email", type => "text");
 171                 $form->field(name => "openid_url", type => "hidden");
 172         }
 173         if ($q->param("do") ne "signin" && !$form->submitted) {
 174                 $form->text("You need to log in first.");
 175         }
 176
 177         if ($form->submitted) {
 178                 my $submittype=$form->submitted;
 179                 # OpenID login uses the Login button, but validates
 180                 # differently.
 181                 if ($submittype eq "Login" && $config{openid} &&
 182                     length $form->field("openid_url")) {
 183                         $submittype="OpenID";
 184
 185                         $form->field(
 186                                 name => "openid_url",
 187                                 validate => sub {
 188                                         # FIXME: ugh
 189                                         IkiWiki::Plugin::openid::validate($q, $session, shift, $form);
 190                                 },
 191                         );
 192                 }
 193
 194                 # Set required fields based on how form was submitted.
 195                 my %required=(
 196                         "Login" => [qw(name password)],
 197                         "Register" => [],
 198                         "Create Account" => [qw(name password confirm_password email)],
 199                         "Mail Password" => [qw(name)],
 200                         "OpenID" => [qw(openid_url)],
 201                 );
 202                 foreach my $opt (@{$required{$submittype}}) {
 203                         $form->field(name => $opt, required => 1);
 204                 }
 205
 206                 # Validate password differently depending on how
 207                 # form was submitted.
 208                 if ($submittype eq 'Login') {
 209                         $form->field(
 210                                 name => "password",
 211                                 validate => sub {
 212                                         length $form->field("name") &&
 213                                         shift eq userinfo_get($form->field("name"), 'password');
 214                                 },
 215                         );
 216                         $form->field(name => "name", validate => '/^\w+$/');
 217                 }
 218                 elsif ($submittype ne 'OpenID') {
 219                         $form->field(name => "password", validate => 'VALUE');
 220                 }
 221                 # And make sure the entered name exists when logging
 222                 # in or sending email, and does not when registering.
 223                 if ($submittype eq 'Create Account' ||
 224                     $submittype eq 'Register') {
 225                         $form->field(
 226                                 name => "name",
 227                                 validate => sub {
 228                                         my $name=shift;
 229                                         length $name &&
 230                                         $name=~/$config{wiki_file_regexp}/ &&
 231                                         ! userinfo_get($name, "regdate");
 232                                 },
 233                         );
 234                 }
 235                 elsif ($submittype ne 'OpenID') {
 236                         $form->field(
 237                                 name => "name",
 238                                 validate => sub {
 239                                         my $name=shift;
 240                                         length $name &&
 241                                         userinfo_get($name, "regdate");
 242                                 },
 243                         );
 244                 }
 245         }
 246         else {
 247                 # First time settings.
 248                 $form->field(name => "name", comment => "use FirstnameLastName");
 249                 if ($session->param("name")) {
 250                         $form->field(name => "name", value => $session->param("name"));
 251                 }
 252         }
 253
 254         if ($form->submitted && $form->validate) {
 255                 if ($form->submitted eq 'Login') {
 256                         $session->param("name", $form->field("name"));
 257                         cgi_postsignin($q, $session);
 258                 }
 259                 elsif ($form->submitted eq 'Create Account') {
 260                         my $user_name=$form->field('name');
 261                         if (userinfo_setall($user_name, {
 262                                            'email' => $form->field('email'),
 263                                            'password' => $form->field('password'),
 264                                            'regdate' => time
 265                                          })) {
 266                                 $form->field(name => "confirm_password", type => "hidden");
 267                                 $form->field(name => "email", type => "hidden");
 268                                 $form->text("Account creation successful. Now you can Login.");
 269                                 printheader($session);
 270                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
 271                         }
 272                         else {
 273                                 error("Error creating account.");
 274                         }
 275                 }
 276                 elsif ($form->submitted eq 'Mail Password') {
 277                         my $user_name=$form->field("name");
 278                         my $template=template("passwordmail.tmpl");
 279                         $template->param(
 280                                 user_name => $user_name,
 281                                 user_password => userinfo_get($user_name, "password"),
 282                                 wikiurl => $config{url},
 283                                 wikiname => $config{wikiname},
 284                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
 285                         );
 286
 287                         eval q{use Mail::Sendmail};
 288                         error($@) if $@;
 289                         sendmail(
 290                                 To => userinfo_get($user_name, "email"),
 291                                 From => "$config{wikiname} admin <$config{adminemail}>",
 292                                 Subject => "$config{wikiname} information",
 293                                 Message => $template->output,
 294                         ) or error("Failed to send mail");
 295
 296                         $form->text("Your password has been emailed to you.");
 297                         $form->field(name => "name", required => 0);
 298                         printheader($session);
 299                         print misctemplate($form->title, $form->render(submit => ["Login", "Mail Password"]));
 300                 }
 301                 elsif ($form->submitted eq "Register") {
 302                         printheader($session);
 303                         print misctemplate($form->title, $form->render(submit => ["Create Account"]));
 304                 }
 305         }
 306         elsif ($form->submitted eq "Create Account") {
 307                 printheader($session);
 308                 print misctemplate($form->title, $form->render(submit => ["Create Account"]));
 309         }
 310         else {
 311                 printheader($session);
 312                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
 313         }
 314 } #}}}
 315
 316 sub cgi_postsignin ($$) { #{{{
 317         my $q=shift;
 318         my $session=shift;
 319
 320         # Continue with whatever was being done before the signin process.
 321         if (defined $q->param("do") && $q->param("do") ne "signin" &&
 322             defined $session->param("postsignin")) {
 323                 my $postsignin=CGI->new($session->param("postsignin"));
 324                 $session->clear("postsignin");
 325                 cgi($postsignin, $session);
 326                 exit;
 327         }
 328         else {
 329                 redirect($q, $config{url});
 330         }
 331 } #}}}
 332
 333 sub cgi_prefs ($$) { #{{{
 334         my $q=shift;
 335         my $session=shift;
 336
 337         eval q{use CGI::FormBuilder};
 338         error($@) if $@;
 339         my $form = CGI::FormBuilder->new(
 340                 title => "preferences",
 341                 fields => [qw(do name password confirm_password email
 342                               subscriptions locked_pages)],
 343                 header => 0,
 344                 charset => "utf-8",
 345                 method => 'POST',
 346                 validate => {
 347                         confirm_password => {
 348                                 perl => q{eq $form->field("password")},
 349                         },
 350                         email => 'EMAIL',
 351                 },
 352                 required => 'NONE',
 353                 javascript => 0,
 354                 params => $q,
 355                 action => $config{cgiurl},
 356                 template => (-e "$config{templatedir}/prefs.tmpl" ?
 357                              {template_params("prefs.tmpl")} : ""),
 358                 stylesheet => baseurl()."style.css",
 359         );
 360         my @buttons=("Save Preferences", "Logout", "Cancel");
 361
 362         my $user_name=$session->param("name");
 363         $form->field(name => "do", type => "hidden");
 364         $form->field(name => "name", disabled => 1,
 365                 value => $user_name, force => 1, size => 30);
 366         $form->field(name => "password", type => "password");
 367         $form->field(name => "confirm_password", type => "password");
 368         $form->field(name => "subscriptions", size => 50,
 369                 comment => "(".htmllink("", "", "PageSpec", 1).")");
 370         $form->field(name => "locked_pages", size => 50,
 371                 comment => "(".htmllink("", "", "PageSpec", 1).")");
 372         $form->field(name => "banned_users", size => 50);
 373
 374         if (! is_admin($user_name)) {
 375                 $form->field(name => "locked_pages", type => "hidden");
 376                 $form->field(name => "banned_users", type => "hidden");
 377         }
 378
 379         if ($config{httpauth}) {
 380                 $form->field(name => "password", type => "hidden");
 381                 $form->field(name => "confirm_password", type => "hidden");
 382         }
 383
 384         if (! $form->submitted) {
 385                 $form->field(name => "email", force => 1,
 386                         value => userinfo_get($user_name, "email"));
 387                 $form->field(name => "subscriptions", force => 1,
 388                         value => userinfo_get($user_name, "subscriptions"));
 389                 $form->field(name => "locked_pages", force => 1,
 390                         value => userinfo_get($user_name, "locked_pages"));
 391                 if (is_admin($user_name)) {
 392                         $form->field(name => "banned_users", force => 1,
 393                                 value => join(" ", get_banned_users()));
 394                 }
 395         }
 396
 397         decode_form_utf8($form);
 398
 399         if ($form->submitted eq 'Logout') {
 400                 $session->delete();
 401                 redirect($q, $config{url});
 402                 return;
 403         }
 404         elsif ($form->submitted eq 'Cancel') {
 405                 redirect($q, $config{url});
 406                 return;
 407         }
 408         elsif ($form->submitted eq "Save Preferences" && $form->validate) {
 409                 foreach my $field (qw(password email subscriptions locked_pages)) {
 410                         if (length $form->field($field)) {
 411                                 userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
 412                         }
 413                 }
 414                 if (is_admin($user_name)) {
 415                         set_banned_users(grep { ! is_admin($_) }
 416                                         split(' ', $form->field("banned_users")));
 417                 }
 418                 $form->text("Preferences saved.");
 419         }
 420
 421         printheader($session);
 422         print misctemplate($form->title, $form->render(submit => \@buttons));
 423 } #}}}
 424
 425 sub cgi_editpage ($$) { #{{{
 426         my $q=shift;
 427         my $session=shift;
 428
 429         my @fields=qw(do rcsinfo subpage from page type editcontent comments);
 430         my @buttons=("Save Page", "Preview", "Cancel");
 431
 432         eval q{use CGI::FormBuilder; use CGI::FormBuilder::Template::HTML};
 433         error($@) if $@;
 434         my $renderer=CGI::FormBuilder::Template::HTML->new(
 435                 fields => \@fields,
 436                 template_params("editpage.tmpl"),
 437         );
 438         run_hooks(pagetemplate => sub {
 439                 shift->(page => "", destpage => "", template => $renderer->engine);
 440         });
 441         my $form = CGI::FormBuilder->new(
 442                 fields => \@fields,
 443                 header => 1,
 444                 charset => "utf-8",
 445                 method => 'POST',
 446                 validate => {
 447                         editcontent => '/.+/',
 448                 },
 449                 required => [qw{editcontent}],
 450                 javascript => 0,
 451                 params => $q,
 452                 action => $config{cgiurl},
 453                 table => 0,
 454                 template => $renderer,
 455         );
 456
 457         decode_form_utf8($form);
 458
 459         # This untaint is safe because titlepage removes any problematic
 460         # characters.
 461         my ($page)=$form->field('page');
 462         $page=titlepage(possibly_foolish_untaint($page));
 463         if (! defined $page || ! length $page ||
 464             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
 465                 error("bad page name");
 466         }
 467
 468         my $from;
 469         if (defined $form->field('from')) {
 470                 ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
 471         }
 472
 473         my $file;
 474         my $type;
 475         if (exists $pagesources{$page}) {
 476                 $file=$pagesources{$page};
 477                 $type=pagetype($file);
 478         }
 479         else {
 480                 $type=$form->param('type');
 481                 if (defined $type && length $type && $hooks{htmlize}{$type}) {
 482                         $type=possibly_foolish_untaint($type);
 483                 }
 484                 elsif (defined $from) {
 485                         # favor the type of linking page
 486                         $type=pagetype($pagesources{$from});
 487                 }
 488                 $type=$config{default_pageext} unless defined $type;
 489                 $file=$page.".".$type;
 490         }
 491
 492         my $newfile=0;
 493         if (! -e "$config{srcdir}/$file") {
 494                 $newfile=1;
 495         }
 496
 497         $form->field(name => "do", type => 'hidden');
 498         $form->field(name => "from", type => 'hidden');
 499         $form->field(name => "rcsinfo", type => 'hidden');
 500         $form->field(name => "subpage", type => 'hidden');
 501         $form->field(name => "page", value => $page, force => 1);
 502         $form->field(name => "type", value => $type, force => 1);
 503         $form->field(name => "comments", type => "text", size => 80);
 504         $form->field(name => "editcontent", type => "textarea", rows => 20,
 505                 cols => 80);
 506         $form->tmpl_param("can_commit", $config{rcs});
 507         $form->tmpl_param("indexlink", indexlink());
 508         $form->tmpl_param("helponformattinglink",
 509                 htmllink("", "", "HelpOnFormatting", 1));
 510         $form->tmpl_param("baseurl", baseurl());
 511         if (! $form->submitted) {
 512                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 513                         force => 1);
 514         }
 515
 516         if ($form->submitted eq "Cancel") {
 517                 if ($newfile && defined $from) {
 518                         redirect($q, "$config{url}/".htmlpage($from));
 519                 }
 520                 elsif ($newfile) {
 521                         redirect($q, $config{url});
 522                 }
 523                 else {
 524                         redirect($q, "$config{url}/".htmlpage($page));
 525                 }
 526                 return;
 527         }
 528         elsif ($form->submitted eq "Preview") {
 529                 my $content=$form->field('editcontent');
 530                 my $comments=$form->field('comments');
 531                 $form->field(name => "editcontent",
 532                                 value => $content, force => 1);
 533                 $form->field(name => "comments",
 534                                 value => $comments, force => 1);
 535                 $config{rss}=$config{atom}=0; # avoid preview writing a feed!
 536                 $form->tmpl_param("page_preview",
 537                         htmlize($page, $type,
 538                         linkify($page, "",
 539                         preprocess($page, $page,
 540                         filter($page, $content)))));
 541         }
 542         else {
 543                 $form->tmpl_param("page_preview", "");
 544         }
 545         $form->tmpl_param("page_conflict", "");
 546
 547         if (! $form->submitted || $form->submitted eq "Preview" ||
 548             ! $form->validate) {
 549                 if ($form->field("do") eq "create") {
 550                         my @page_locs;
 551                         my $best_loc;
 552                         if (! defined $from || ! length $from ||
 553                             $from ne $form->field('from') ||
 554                             $from=~/$config{wiki_file_prune_regexp}/ ||
 555                             $from=~/^\// ||
 556                             $form->submitted eq "Preview") {
 557                                 @page_locs=$best_loc=$page;
 558                         }
 559                         else {
 560                                 my $dir=$from."/";
 561                                 $dir=~s![^/]+/+$!!;
 562
 563                                 if ((defined $form->field('subpage') && length $form->field('subpage')) ||
 564                                     $page eq 'discussion') {
 565                                         $best_loc="$from/$page";
 566                                 }
 567                                 else {
 568                                         $best_loc=$dir.$page;
 569                                 }
 570
 571                                 push @page_locs, $dir.$page;
 572                                 push @page_locs, "$from/$page";
 573                                 while (length $dir) {
 574                                         $dir=~s![^/]+/+$!!;
 575                                         push @page_locs, $dir.$page;
 576                                 }
 577                         }
 578
 579                         @page_locs = grep {
 580                                 ! exists $pagecase{lc $_} &&
 581                                 ! page_locked($_, $session, 1)
 582                         } @page_locs;
 583
 584                         if (! @page_locs) {
 585                                 # hmm, someone else made the page in the
 586                                 # meantime?
 587                                 redirect($q, "$config{url}/".htmlpage($page));
 588                                 return;
 589                         }
 590
 591                         my @page_types;
 592                         if (exists $hooks{htmlize}) {
 593                                 @page_types=keys %{$hooks{htmlize}};
 594                         }
 595
 596                         $form->tmpl_param("page_select", 1);
 597                         $form->field(name => "page", type => 'select',
 598                                 options => \@page_locs, value => $best_loc);
 599                         $form->field(name => "type", type => 'select',
 600                                 options => \@page_types);
 601                         $form->title("creating ".pagetitle($page));
 602                 }
 603                 elsif ($form->field("do") eq "edit") {
 604                         page_locked($page, $session);
 605                         if (! defined $form->field('editcontent') ||
 606                             ! length $form->field('editcontent')) {
 607                                 my $content="";
 608                                 if (exists $pagesources{$page}) {
 609                                         $content=readfile(srcfile($pagesources{$page}));
 610                                         $content=~s/\n/\r\n/g;
 611                                 }
 612                                 $form->field(name => "editcontent", value => $content,
 613                                         force => 1);
 614                         }
 615                         $form->tmpl_param("page_select", 0);
 616                         $form->field(name => "page", type => 'hidden');
 617                         $form->field(name => "type", type => 'hidden');
 618                         $form->title("editing ".pagetitle($page));
 619                 }
 620
 621                 print $form->render(submit => \@buttons);
 622         }
 623         else {
 624                 # save page
 625                 page_locked($page, $session);
 626
 627                 my $content=$form->field('editcontent');
 628
 629                 $content=~s/\r\n/\n/g;
 630                 $content=~s/\r/\n/g;
 631                 writefile($file, $config{srcdir}, $content);
 632
 633                 my $message="web commit ";
 634                 if (defined $session->param("name") &&
 635                     length $session->param("name")) {
 636                         $message.="by ".$session->param("name");
 637                 }
 638                 else {
 639                         $message.="from $ENV{REMOTE_ADDR}";
 640                 }
 641                 if (defined $form->field('comments') &&
 642                     length $form->field('comments')) {
 643                         $message.=": ".$form->field('comments');
 644                 }
 645
 646                 if ($config{rcs}) {
 647                         if ($newfile) {
 648                                 rcs_add($file);
 649                         }
 650                         # prevent deadlock with post-commit hook
 651                         unlockwiki();
 652                         # presumably the commit will trigger an update
 653                         # of the wiki
 654                         my $conflict=rcs_commit($file, $message,
 655                                 $form->field("rcsinfo"));
 656
 657                         if (defined $conflict) {
 658                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 659                                         force => 1);
 660                                 $form->tmpl_param("page_conflict", 1);
 661                                 $form->field("editcontent", value => $conflict, force => 1);
 662                                 $form->field(name => "comments", value => $form->field('comments'), force => 1);
 663                                 $form->field("do", "edit)");
 664                                 $form->tmpl_param("page_select", 0);
 665                                 $form->field(name => "page", type => 'hidden');
 666                                 $form->field(name => "type", type => 'hidden');
 667                                 $form->title("editing $page");
 668                                 print $form->render(submit => \@buttons);
 669                                 return;
 670                         }
 671                 }
 672                 else {
 673                         require IkiWiki::Render;
 674                         refresh();
 675                         saveindex();
 676                 }
 677
 678                 # The trailing question mark tries to avoid broken
 679                 # caches and get the most recent version of the page.
 680                 redirect($q, "$config{url}/".htmlpage($page)."?updated");
 681         }
 682 } #}}}
 683
 684 sub cgi (;$$) { #{{{
 685         my $q=shift;
 686         my $session=shift;
 687
 688         if (! $q) {
 689                 eval q{use CGI; use CGI::Session};
 690                 error($@) if $@;
 691
 692                 $q=CGI->new;
 693
 694                 run_hooks(cgi => sub { shift->($q) });
 695         }
 696
 697         my $do=$q->param('do');
 698         if (! defined $do || ! length $do) {
 699                 my $error = $q->cgi_error;
 700                 if ($error) {
 701                         error("Request not processed: $error");
 702                 }
 703                 else {
 704                         error("\"do\" parameter missing");
 705                 }
 706         }
 707
 708         # Things that do not need a session.
 709         if ($do eq 'recentchanges') {
 710                 cgi_recentchanges($q);
 711                 return;
 712         }
 713         elsif ($do eq 'hyperestraier') {
 714                 cgi_hyperestraier();
 715         }
 716
 717         # Need to lock the wiki before getting a session.
 718         lockwiki();
 719
 720         if (! $session) {
 721                 CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
 722
 723                 my $oldmask=umask(077);
 724                 $session = CGI::Session->new("driver:DB_File", $q,
 725                         { FileName => "$config{wikistatedir}/sessions.db" });
 726                 umask($oldmask);
 727         }
 728
 729         # Auth hooks can sign a user in.
 730         if ($do ne 'signin' && ! defined $session->param("name")) {
 731                 run_hooks(auth => sub {
 732                         shift->($q, $session)
 733                 });
 734                 if (defined $session->param("name")) {
 735                         # Make sure whatever user was authed is in the
 736                         # userinfo db.
 737                         if (! userinfo_get($session->param("name"), "regdate")) {
 738                                 userinfo_setall($session->param("name"), {
 739                                         email => "",
 740                                         password => "",
 741                                         regdate => time,
 742                                 });
 743                         }
 744                 }
 745         }
 746
 747         # Everything below this point needs the user to be signed in.
 748         if (((! $config{anonok} || $do eq 'prefs') &&
 749              (! defined $session->param("name") ||
 750              ! userinfo_get($session->param("name"), "regdate")))
 751             || $do eq 'signin') {
 752                 if ($do ne 'signin' && ! defined $session->param("postsignin")) {
 753                         $session->param(postsignin => $ENV{QUERY_STRING});
 754                 }
 755                 cgi_signin($q, $session);
 756
 757                 # Force session flush with safe umask.
 758                 my $oldmask=umask(077);
 759                 $session->flush;
 760                 umask($oldmask);
 761
 762                 return;
 763         }
 764         elsif (defined $session->param("postsignin")) {
 765                 cgi_postsignin($q, $session);
 766         }
 767
 768         if (defined $session->param("name") && userinfo_get($session->param("name"), "banned")) {
 769                 print $q->header(-status => "403 Forbidden");
 770                 $session->delete();
 771                 print "You are banned.";
 772                 exit;
 773         }
 774
 775         if ($do eq 'create' || $do eq 'edit') {
 776                 cgi_editpage($q, $session);
 777         }
 778         elsif ($do eq 'prefs') {
 779                 cgi_prefs($q, $session);
 780         }
 781         elsif ($do eq 'blog') {
 782                 my $page=titlepage(decode_utf8($q->param('title')));
 783                 # if the page already exists, munge it to be unique
 784                 my $from=$q->param('from');
 785                 my $add="";
 786                 while (exists $pagecase{lc "$from/$page$add"}) {
 787                         $add=1 unless length $add;
 788                         $add++;
 789                 }
 790                 $q->param('page', $page.$add);
 791                 # now run same as create
 792                 $q->param('do', 'create');
 793                 cgi_editpage($q, $session);
 794         }
 795         else {
 796                 error("unknown do parameter");
 797         }
 798 } #}}}
 799
 800 1