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