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