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 showform ($$$$) { #{{{
  25         my $form=shift;
  26         my $buttons=shift;
  27         my $session=shift;
  28         my $cgi=shift;
  29
  30         if (exists $hooks{formbuilder}) {
  31                 run_hooks(formbuilder => sub {
  32                         shift->(form => $form, cgi => $cgi, session => $session,
  33                                 buttons => $buttons);
  34                 });
  35         }
  36
  37         printheader($session);
  38         print misctemplate($form->title, $form->render(submit => $buttons));
  39 }
  40
  41 sub redirect ($$) { #{{{
  42         my $q=shift;
  43         my $url=shift;
  44         if (! $config{w3mmode}) {
  45                 print $q->redirect($url);
  46         }
  47         else {
  48                 print "Content-type: text/plain\n";
  49                 print "W3m-control: GOTO $url\n\n";
  50         }
  51 } #}}}
  52
  53 sub check_canedit ($$$;$) { #{{{
  54         my $page=shift;
  55         my $q=shift;
  56         my $session=shift;
  57         my $nonfatal=shift;
  58
  59         my $canedit;
  60         run_hooks(canedit => sub {
  61                 return if defined $canedit;
  62                 my $ret=shift->($page, $q, $session);
  63                 if (defined $ret && $ret eq "") {
  64                         $canedit=1;
  65                 }
  66                 elsif (defined $ret) {
  67                         $canedit=0;
  68                         error($ret) unless $nonfatal;
  69                 }
  70         });
  71         return $canedit;
  72 } #}}}
  73
  74 sub decode_cgi_utf8 ($) { #{{{
  75         my $cgi = shift;
  76         foreach my $f ($cgi->param) {
  77                 $cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
  78         }
  79 } #}}}
  80
  81 sub cgi_recentchanges ($) { #{{{
  82         my $q=shift;
  83
  84         # Optimisation: building recentchanges means calculating lots of
  85         # links. Memoizing htmllink speeds it up a lot (can't be memoized
  86         # during page builds as the return values may change, but they
  87         # won't here.)
  88         eval q{use Memoize};
  89         error($@) if $@;
  90         memoize("htmllink");
  91
  92         eval q{use Time::Duration};
  93         error($@) if $@;
  94
  95         my $changelog=[rcs_recentchanges(100)];
  96         foreach my $change (@$changelog) {
  97                 $change->{when} = concise(ago($change->{when}));
  98
  99                 $change->{user} = userlink($change->{user});
 100
 101                 my $is_excess = exists $change->{pages}[10]; # limit pages to first 10
 102                 delete @{$change->{pages}}[10 .. @{$change->{pages}}] if $is_excess;
 103                 $change->{pages} = [
 104                         map {
 105                                 $_->{link} = htmllink("", "", $_->{page},
 106                                         noimageinline => 1,
 107                                         linktext => pagetitle($_->{page}));
 108                                 $_;
 109                         } @{$change->{pages}}
 110                 ];
 111                 push @{$change->{pages}}, { link => '...' } if $is_excess;
 112         }
 113
 114         my $template=template("recentchanges.tmpl");
 115         $template->param(
 116                 title => "RecentChanges",
 117                 indexlink => indexlink(),
 118                 wikiname => $config{wikiname},
 119                 changelog => $changelog,
 120                 baseurl => baseurl(),
 121         );
 122         run_hooks(pagetemplate => sub {
 123                 shift->(page => "", destpage => "", template => $template);
 124         });
 125         print $q->header(-charset => 'utf-8'), $template->output;
 126 } #}}}
 127
 128 # Check if the user is signed in. If not, redirect to the signin form and
 129 # save their place to return to later.
 130 sub needsignin ($$) { #{{{
 131         my $q=shift;
 132         my $session=shift;
 133
 134         if (! defined $session->param("name") ||
 135             ! userinfo_get($session->param("name"), "regdate")) {
 136                 $session->param(postsignin => $ENV{QUERY_STRING});
 137                 cgi_signin($q, $session);
 138                 cgi_savesession($session);
 139                 exit;
 140         }
 141 } #}}}
 142
 143 sub cgi_signin ($$) { #{{{
 144         my $q=shift;
 145         my $session=shift;
 146
 147         decode_cgi_utf8($q);
 148         eval q{use CGI::FormBuilder};
 149         error($@) if $@;
 150         my $form = CGI::FormBuilder->new(
 151                 title => "signin",
 152                 name => "signin",
 153                 charset => "utf-8",
 154                 method => 'POST',
 155                 required => 'NONE',
 156                 javascript => 0,
 157                 params => $q,
 158                 action => $config{cgiurl},
 159                 header => 0,
 160                 template => {type => 'div'},
 161                 stylesheet => baseurl()."style.css",
 162         );
 163         my $buttons=["Login"];
 164
 165         if ($q->param("do") ne "signin" && !$form->submitted) {
 166                 $form->text(gettext("You need to log in first."));
 167         }
 168         $form->field(name => "do", type => "hidden", value => "signin",
 169                 force => 1);
 170
 171         run_hooks(formbuilder_setup => sub {
 172                 shift->(form => $form, cgi => $q, session => $session,
 173                         buttons => $buttons);
 174         });
 175
 176         if ($form->submitted) {
 177                 $form->validate;
 178         }
 179
 180         showform($form, $buttons, $session, $q);
 181 } #}}}
 182
 183 sub cgi_postsignin ($$) { #{{{
 184         my $q=shift;
 185         my $session=shift;
 186
 187         # Continue with whatever was being done before the signin process.
 188         if (defined $session->param("postsignin")) {
 189                 my $postsignin=CGI->new($session->param("postsignin"));
 190                 $session->clear("postsignin");
 191                 cgi($postsignin, $session);
 192                 cgi_savesession($session);
 193                 exit;
 194         }
 195         else {
 196                 error(gettext("login failed, perhaps you need to turn on cookies?"));
 197         }
 198 } #}}}
 199
 200 sub cgi_prefs ($$) { #{{{
 201         my $q=shift;
 202         my $session=shift;
 203
 204         needsignin($q, $session);
 205
 206         decode_cgi_utf8($q);
 207         eval q{use CGI::FormBuilder};
 208         error($@) if $@;
 209         my $form = CGI::FormBuilder->new(
 210                 title => "preferences",
 211                 name => "preferences",
 212                 header => 0,
 213                 charset => "utf-8",
 214                 method => 'POST',
 215                 validate => {
 216                         email => 'EMAIL',
 217                 },
 218                 required => 'NONE',
 219                 javascript => 0,
 220                 params => $q,
 221                 action => $config{cgiurl},
 222                 template => {type => 'div'},
 223                 stylesheet => baseurl()."style.css",
 224                 fieldsets => [
 225                         [login => gettext("Login")],
 226                         [preferences => gettext("Preferences")],
 227                         [admin => gettext("Admin")]
 228                 ],
 229         );
 230         my $buttons=["Save Preferences", "Logout", "Cancel"];
 231
 232         run_hooks(formbuilder_setup => sub {
 233                 shift->(form => $form, cgi => $q, session => $session,
 234                         buttons => $buttons);
 235         });
 236
 237         $form->field(name => "do", type => "hidden");
 238         $form->field(name => "email", size => 50, fieldset => "preferences");
 239         $form->field(name => "subscriptions", size => 50,
 240                 fieldset => "preferences",
 241                 comment => "(".htmllink("", "", "ikiwiki/PageSpec", noimageinline => 1).")");
 242         $form->field(name => "banned_users", size => 50,
 243                 fieldset => "admin");
 244
 245         my $user_name=$session->param("name");
 246         if (! is_admin($user_name)) {
 247                 $form->field(name => "banned_users", type => "hidden");
 248         }
 249
 250         if (! $form->submitted) {
 251                 $form->field(name => "email", force => 1,
 252                         value => userinfo_get($user_name, "email"));
 253                 $form->field(name => "subscriptions", force => 1,
 254                         value => userinfo_get($user_name, "subscriptions"));
 255                 if (is_admin($user_name)) {
 256                         $form->field(name => "banned_users", force => 1,
 257                                 value => join(" ", get_banned_users()));
 258                 }
 259         }
 260
 261         if ($form->submitted eq 'Logout') {
 262                 $session->delete();
 263                 redirect($q, $config{url});
 264                 return;
 265         }
 266         elsif ($form->submitted eq 'Cancel') {
 267                 redirect($q, $config{url});
 268                 return;
 269         }
 270         elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
 271                 foreach my $field (qw(email subscriptions)) {
 272                         if (defined $form->field($field) && length $form->field($field)) {
 273                                 userinfo_set($user_name, $field, $form->field($field)) ||
 274                                         error("failed to set $field");
 275                         }
 276                 }
 277                 if (is_admin($user_name)) {
 278                         set_banned_users(grep { ! is_admin($_) }
 279                                         split(' ',
 280                                                 $form->field("banned_users"))) ||
 281                                 error("failed saving changes");
 282                 }
 283                 $form->text(gettext("Preferences saved."));
 284         }
 285
 286         showform($form, $buttons, $session, $q);
 287 } #}}}
 288
 289 sub cgi_editpage ($$) { #{{{
 290         my $q=shift;
 291         my $session=shift;
 292
 293         my @fields=qw(do rcsinfo subpage from page type editcontent comments);
 294         my @buttons=("Save Page", "Preview", "Cancel");
 295
 296         decode_cgi_utf8($q);
 297         eval q{use CGI::FormBuilder};
 298         error($@) if $@;
 299         my $form = CGI::FormBuilder->new(
 300                 title => "editpage",
 301                 fields => \@fields,
 302                 charset => "utf-8",
 303                 method => 'POST',
 304                 required => [qw{editcontent}],
 305                 javascript => 0,
 306                 params => $q,
 307                 action => $config{cgiurl},
 308                 header => 0,
 309                 table => 0,
 310                 template => scalar template_params("editpage.tmpl"),
 311                 wikiname => $config{wikiname},
 312         );
 313
 314         run_hooks(formbuilder_setup => sub {
 315                 shift->(form => $form, cgi => $q, session => $session,
 316                         buttons => \@buttons);
 317         });
 318
 319         # This untaint is safe because titlepage removes any problematic
 320         # characters.
 321         my ($page)=$form->field('page');
 322         $page=titlepage(possibly_foolish_untaint($page));
 323         if (! defined $page || ! length $page ||
 324             file_pruned($page, $config{srcdir}) || $page=~/^\//) {
 325                 error("bad page name");
 326         }
 327
 328         my $from;
 329         if (defined $form->field('from')) {
 330                 ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
 331         }
 332
 333         my $file;
 334         my $type;
 335         if (exists $pagesources{$page} && $form->field("do") ne "create") {
 336                 $file=$pagesources{$page};
 337                 $type=pagetype($file);
 338                 if (! defined $type) {
 339                         error(sprintf(gettext("%s is not an editable page"), $page));
 340                 }
 341                 if (! $form->submitted) {
 342                         $form->field(name => "rcsinfo",
 343                                 value => rcs_prepedit($file), force => 1);
 344                 }
 345                 $form->field(name => "editcontent", validate => '/.*/');
 346         }
 347         else {
 348                 $type=$form->param('type');
 349                 if (defined $type && length $type && $hooks{htmlize}{$type}) {
 350                         $type=possibly_foolish_untaint($type);
 351                 }
 352                 elsif (defined $from && exists $pagesources{$from}) {
 353                         # favor the type of linking page
 354                         $type=pagetype($pagesources{$from});
 355                 }
 356                 $type=$config{default_pageext} unless defined $type;
 357                 $file=$page.".".$type;
 358                 if (! $form->submitted) {
 359                         $form->field(name => "rcsinfo", value => "", force => 1);
 360                 }
 361                 $form->field(name => "editcontent", validate => '/.+/');
 362         }
 363
 364         $form->field(name => "do", type => 'hidden');
 365         $form->field(name => "from", type => 'hidden');
 366         $form->field(name => "rcsinfo", type => 'hidden');
 367         $form->field(name => "subpage", type => 'hidden');
 368         $form->field(name => "page", value => pagetitle($page, 1), force => 1);
 369         $form->field(name => "type", value => $type, force => 1);
 370         $form->field(name => "comments", type => "text", size => 80);
 371         $form->field(name => "editcontent", type => "textarea", rows => 20,
 372                 cols => 80);
 373         $form->tmpl_param("can_commit", $config{rcs});
 374         $form->tmpl_param("indexlink", indexlink());
 375         $form->tmpl_param("helponformattinglink",
 376                 htmllink("", "", "ikiwiki/formatting",
 377                         noimageinline => 1,
 378                         linktext => "FormattingHelp"));
 379         $form->tmpl_param("baseurl", baseurl());
 380
 381         if ($form->submitted eq "Cancel") {
 382                 if ($form->field("do") eq "create" && defined $from) {
 383                         redirect($q, "$config{url}/".htmlpage($from));
 384                 }
 385                 elsif ($form->field("do") eq "create") {
 386                         redirect($q, $config{url});
 387                 }
 388                 else {
 389                         redirect($q, "$config{url}/".htmlpage($page));
 390                 }
 391                 return;
 392         }
 393         elsif ($form->submitted eq "Preview") {
 394                 my $content=$form->field('editcontent');
 395                 run_hooks(editcontent => sub {
 396                         $content=shift->(
 397                                 content => $content,
 398                                 page => $page,
 399                                 cgi => $q,
 400                                 session => $session,
 401                         );
 402                 });
 403                 $form->tmpl_param("page_preview",
 404                         htmlize($page, $type,
 405                         linkify($page, "",
 406                         preprocess($page, $page,
 407                         filter($page, $page, $content), 0, 1))));
 408         }
 409         elsif ($form->submitted eq "Save Page") {
 410                 $form->tmpl_param("page_preview", "");
 411         }
 412         $form->tmpl_param("page_conflict", "");
 413
 414         if ($form->submitted ne "Save Page" || ! $form->validate) {
 415                 if ($form->field("do") eq "create") {
 416                         my @page_locs;
 417                         my $best_loc;
 418                         if (! defined $from || ! length $from ||
 419                             $from ne $form->field('from') ||
 420                             file_pruned($from, $config{srcdir}) ||
 421                             $from=~/^\// ||
 422                             $form->submitted eq "Preview") {
 423                                 @page_locs=$best_loc=$page;
 424                         }
 425                         else {
 426                                 my $dir=$from."/";
 427                                 $dir=~s![^/]+/+$!!;
 428
 429                                 if ((defined $form->field('subpage') && length $form->field('subpage')) ||
 430                                     $page eq gettext('discussion')) {
 431                                         $best_loc="$from/$page";
 432                                 }
 433                                 else {
 434                                         $best_loc=$dir.$page;
 435                                 }
 436
 437                                 push @page_locs, $dir.$page;
 438                                 push @page_locs, "$from/$page";
 439                                 while (length $dir) {
 440                                         $dir=~s![^/]+/+$!!;
 441                                         push @page_locs, $dir.$page;
 442                                 }
 443                         }
 444                         push @page_locs, "$config{userdir}/$page"
 445                                 if length $config{userdir};
 446
 447                         @page_locs = grep {
 448                                 ! exists $pagecase{lc $_}
 449                         } @page_locs;
 450                         if (! @page_locs) {
 451                                 # hmm, someone else made the page in the
 452                                 # meantime?
 453                                 redirect($q, "$config{url}/".htmlpage($page));
 454                                 return;
 455                         }
 456
 457                         my @editable_locs = grep {
 458                                 check_canedit($_, $q, $session, 1)
 459                         } @page_locs;
 460                         if (! @editable_locs) {
 461                                 # let it throw an error this time
 462                                 map { check_canedit($_, $q, $session) } @page_locs;
 463                         }
 464
 465                         my @page_types;
 466                         if (exists $hooks{htmlize}) {
 467                                 @page_types=keys %{$hooks{htmlize}};
 468                         }
 469
 470                         $form->tmpl_param("page_select", 1);
 471                         $form->field(name => "page", type => 'select',
 472                                 options => [ map { pagetitle($_, 1) } @editable_locs ],
 473                                 value => pagetitle($best_loc, 1));
 474                         $form->field(name => "type", type => 'select',
 475                                 options => \@page_types);
 476                         $form->title(sprintf(gettext("creating %s"), pagetitle($page)));
 477
 478                 }
 479                 elsif ($form->field("do") eq "edit") {
 480                         check_canedit($page, $q, $session);
 481                         if (! defined $form->field('editcontent') ||
 482                             ! length $form->field('editcontent')) {
 483                                 my $content="";
 484                                 if (exists $pagesources{$page}) {
 485                                         $content=readfile(srcfile($pagesources{$page}));
 486                                         $content=~s/\n/\r\n/g;
 487                                 }
 488                                 $form->field(name => "editcontent", value => $content,
 489                                         force => 1);
 490                         }
 491                         $form->tmpl_param("page_select", 0);
 492                         $form->field(name => "page", type => 'hidden');
 493                         $form->field(name => "type", type => 'hidden');
 494                         $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
 495                 }
 496
 497                 showform($form, \@buttons, $session, $q);
 498                 saveindex();
 499         }
 500         else {
 501                 # save page
 502                 check_canedit($page, $q, $session);
 503
 504                 my $exists=-e "$config{srcdir}/$file";
 505
 506                 if ($form->field("do") ne "create" && ! $exists &&
 507                     ! eval { srcfile($file) }) {
 508                         $form->tmpl_param("page_gone", 1);
 509                         $form->field(name => "do", value => "create", force => 1);
 510                         $form->tmpl_param("page_select", 0);
 511                         $form->field(name => "page", type => 'hidden');
 512                         $form->field(name => "type", type => 'hidden');
 513                         $form->title(sprintf(gettext("editing %s"), $page));
 514                         showform($form, \@buttons, $session, $q);
 515                         return;
 516                 }
 517                 elsif ($form->field("do") eq "create" && $exists) {
 518                         $form->tmpl_param("creation_conflict", 1);
 519                         $form->field(name => "do", value => "edit", force => 1);
 520                         $form->tmpl_param("page_select", 0);
 521                         $form->field(name => "page", type => 'hidden');
 522                         $form->field(name => "type", type => 'hidden');
 523                         $form->title(sprintf(gettext("editing %s"), $page));
 524                         $form->field("editcontent",
 525                                 value => readfile("$config{srcdir}/$file").
 526                                          "\n\n\n".$form->field("editcontent"),
 527                                 force => 1);
 528                         showform($form, \@buttons, $session, $q);
 529                         return;
 530                 }
 531
 532                 my $content=$form->field('editcontent');
 533                 run_hooks(editcontent => sub {
 534                         $content=shift->(
 535                                 content => $content,
 536                                 page => $page,
 537                                 cgi => $q,
 538                                 session => $session,
 539                         );
 540                 });
 541                 $content=~s/\r\n/\n/g;
 542                 $content=~s/\r/\n/g;
 543                 $content.="\n" if $content !~ /\n$/;
 544
 545                 $config{cgi}=0; # avoid cgi error message
 546                 eval { writefile($file, $config{srcdir}, $content) };
 547                 $config{cgi}=1;
 548                 if ($@) {
 549                         $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 550                                 force => 1);
 551                         $form->tmpl_param("failed_save", 1);
 552                         $form->tmpl_param("error_message", $@);
 553                         $form->field("editcontent", value => $content, force => 1);
 554                         $form->tmpl_param("page_select", 0);
 555                         $form->field(name => "page", type => 'hidden');
 556                         $form->field(name => "type", type => 'hidden');
 557                         $form->title(sprintf(gettext("editing %s"), $page));
 558                         showform($form, \@buttons, $session, $q);
 559                         return;
 560                 }
 561
 562                 my $conflict;
 563                 if ($config{rcs}) {
 564                         my $message="";
 565                         if (defined $form->field('comments') &&
 566                             length $form->field('comments')) {
 567                                 $message=$form->field('comments');
 568                         }
 569
 570                         if (! $exists) {
 571                                 rcs_add($file);
 572                         }
 573
 574                         # Prevent deadlock with post-commit hook by
 575                         # signaling to it that it should not try to
 576                         # do anything (except send commit mails).
 577                         disable_commit_hook();
 578                         $conflict=rcs_commit($file, $message,
 579                                 $form->field("rcsinfo"),
 580                                 $session->param("name"), $ENV{REMOTE_ADDR});
 581                         enable_commit_hook();
 582                         rcs_update();
 583                 }
 584
 585                 # Refresh even if there was a conflict, since other changes
 586                 # may have been committed while the post-commit hook was
 587                 # disabled.
 588                 require IkiWiki::Render;
 589                 # Reload index, since the first time it's loaded is before
 590                 # the wiki is locked, and things may have changed in the
 591                 # meantime.
 592                 loadindex();
 593                 refresh();
 594                 saveindex();
 595
 596                 if (defined $conflict) {
 597                         $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 598                                 force => 1);
 599                         $form->tmpl_param("page_conflict", 1);
 600                         $form->field("editcontent", value => $conflict, force => 1);
 601                         $form->field("do", "edit", force => 1);
 602                         $form->tmpl_param("page_select", 0);
 603                         $form->field(name => "page", type => 'hidden');
 604                         $form->field(name => "type", type => 'hidden');
 605                         $form->title(sprintf(gettext("editing %s"), $page));
 606                         showform($form, \@buttons, $session, $q);
 607                         return;
 608                 }
 609                 else {
 610                         # The trailing question mark tries to avoid broken
 611                         # caches and get the most recent version of the page.
 612                         redirect($q, "$config{url}/".htmlpage($page)."?updated");
 613                 }
 614         }
 615 } #}}}
 616
 617 sub cgi_getsession ($) { #{{{
 618         my $q=shift;
 619
 620         eval q{use CGI::Session};
 621         CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
 622
 623         my $oldmask=umask(077);
 624         my $session = CGI::Session->new("driver:DB_File", $q,
 625                 { FileName => "$config{wikistatedir}/sessions.db" });
 626         umask($oldmask);
 627
 628         return $session;
 629 } #}}}
 630
 631 sub cgi_savesession ($) { #{{{
 632         my $session=shift;
 633
 634         # Force session flush with safe umask.
 635         my $oldmask=umask(077);
 636         $session->flush;
 637         umask($oldmask);
 638 } #}}}
 639
 640 sub cgi (;$$) { #{{{
 641         my $q=shift;
 642         my $session=shift;
 643
 644         if (! $q) {
 645                 eval q{use CGI};
 646                 error($@) if $@;
 647
 648                 $q=CGI->new;
 649
 650                 run_hooks(cgi => sub { shift->($q) });
 651         }
 652
 653         my $do=$q->param('do');
 654         if (! defined $do || ! length $do) {
 655                 my $error = $q->cgi_error;
 656                 if ($error) {
 657                         error("Request not processed: $error");
 658                 }
 659                 else {
 660                         error("\"do\" parameter missing");
 661                 }
 662         }
 663
 664         # Things that do not need a session.
 665         if ($do eq 'recentchanges') {
 666                 cgi_recentchanges($q);
 667                 return;
 668         }
 669
 670         # Need to lock the wiki before getting a session.
 671         lockwiki();
 672
 673         if (! $session) {
 674                 $session=cgi_getsession($q);
 675         }
 676
 677         # Auth hooks can sign a user in.
 678         if ($do ne 'signin' && ! defined $session->param("name")) {
 679                 run_hooks(auth => sub {
 680                         shift->($q, $session)
 681                 });
 682                 if (defined $session->param("name")) {
 683                         # Make sure whatever user was authed is in the
 684                         # userinfo db.
 685                         if (! userinfo_get($session->param("name"), "regdate")) {
 686                                 userinfo_setall($session->param("name"), {
 687                                         email => "",
 688                                         password => "",
 689                                         regdate => time,
 690                                 }) || error("failed adding user");
 691                         }
 692                 }
 693         }
 694
 695         if (defined $session->param("name") &&
 696             userinfo_get($session->param("name"), "banned")) {
 697                 print $q->header(-status => "403 Forbidden");
 698                 $session->delete();
 699                 print gettext("You are banned.");
 700                 cgi_savesession($session);
 701         }
 702
 703         run_hooks(sessioncgi => sub { shift->($q, $session) });
 704
 705         if ($do eq 'signin') {
 706                 cgi_signin($q, $session);
 707                 cgi_savesession($session);
 708         }
 709         elsif ($do eq 'prefs') {
 710                 cgi_prefs($q, $session);
 711         }
 712         elsif ($do eq 'create' || $do eq 'edit') {
 713                 cgi_editpage($q, $session);
 714         }
 715         elsif (defined $session->param("postsignin")) {
 716                 cgi_postsignin($q, $session);
 717         }
 718         else {
 719                 error("unknown do parameter");
 720         }
 721 } #}}}
 722
 723 sub userlink ($) { #{{{
 724         my $user=shift;
 725
 726         eval q{use CGI 'escapeHTML'};
 727         error($@) if $@;
 728         if ($user =~ m!^https?://! &&
 729             eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
 730                 # Munge user-urls, as used by eg, OpenID.
 731                 my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
 732                 my $display=$oid->display;
 733                 # Convert "user.somehost.com" to "user [somehost.com]".
 734                 if ($display !~ /\[/) {
 735                         $display=~s/^(.*?)\.([^.]+\.[a-z]+)$/$1 [$2]/;
 736                 }
 737                 # Convert "http://somehost.com/user" to "user [somehost.com]".
 738                 if ($display !~ /\[/) {
 739                         $display=~s/^https?:\/\/(.+)\/([^\/]+)$/$2 [$1]/;
 740                 }
 741                 $display=~s!^https?://!!; # make sure this is removed
 742                 return "<a href=\"$user\">".escapeHTML($display)."</a>";
 743         }
 744         else {
 745                 return htmllink("", "", escapeHTML(
 746                         length $config{userdir} ? $config{userdir}."/".$user : $user
 747                 ), noimageinline => 1);
 748         }
 749 } #}}}
 750
 751 1