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