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