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