IkiWiki/CGI.pm

   1 #!/usr/bin/perl
   2
   3 use warnings;
   4 use strict;
   5 use IkiWiki;
   6 use IkiWiki::UserInfo;
   7 use open qw{:utf8 :std};
   8 use Encode;
   9
  10 package IkiWiki;
  11
  12 sub printheader ($) { #{{{
  13         my $session=shift;
  14
  15         if ($config{sslcookie}) {
  16                 print $session->header(-charset => 'utf-8',
  17                         -cookie => $session->cookie(-secure => 1));
  18         } else {
  19                 print $session->header(-charset => 'utf-8');
  20         }
  21
  22 } #}}}
  23
  24 sub redirect ($$) { #{{{
  25         my $q=shift;
  26         my $url=shift;
  27         if (! $config{w3mmode}) {
  28                 print $q->redirect($url);
  29         }
  30         else {
  31                 print "Content-type: text/plain\n";
  32                 print "W3m-control: GOTO $url\n\n";
  33         }
  34 } #}}}
  35
  36 sub page_locked ($$;$) { #{{{
  37         my $page=shift;
  38         my $session=shift;
  39         my $nonfatal=shift;
  40
  41         my $user=$session->param("name");
  42         return if defined $user && is_admin($user);
  43
  44         foreach my $admin (@{$config{adminuser}}) {
  45                 my $locked_pages=userinfo_get($admin, "locked_pages");
  46                 if (pagespec_match($page, userinfo_get($admin, "locked_pages"))) {
  47                         return 1 if $nonfatal;
  48
  49                         error(sprintf(gettext("%s is locked by %s and cannot be edited"),
  50                                 htmllink("", "", $page, 1),
  51                                 userlink($admin)));
  52                 }
  53         }
  54
  55         return 0;
  56 } #}}}
  57
  58 sub decode_form_utf8 ($) { #{{{
  59         my $form = shift;
  60         foreach my $f ($form->field) {
  61                 next if Encode::is_utf8(scalar $form->field($f));
  62                 $form->field(name  => $f,
  63                              value => decode_utf8($form->field($f)),
  64                              force => 1,
  65                             );
  66         }
  67 } #}}}
  68
  69 sub cgi_recentchanges ($) { #{{{
  70         my $q=shift;
  71
  72         # Optimisation: building recentchanges means calculating lots of
  73         # links. Memoizing htmllink speeds it up a lot (can't be memoized
  74         # during page builds as the return values may change, but they
  75         # won't here.)
  76         eval q{use Memoize};
  77         error($@) if $@;
  78         memoize("htmllink");
  79
  80         eval q{use Time::Duration};
  81         error($@) if $@;
  82
  83         my $changelog=[rcs_recentchanges(100)];
  84         foreach my $change (@$changelog) {
  85                 $change->{when} = concise(ago($change->{when}));
  86
  87                 $change->{user} = userlink($change->{user});
  88
  89                 my $is_excess = exists $change->{pages}[10]; # limit pages to first 10
  90                 delete @{$change->{pages}}[10 .. @{$change->{pages}}] if $is_excess;
  91                 $change->{pages} = [
  92                         map {
  93                                 $_->{link} = htmllink("", "", $_->{page}, 1);
  94                                 $_;
  95                         } @{$change->{pages}}
  96                 ];
  97                 push @{$change->{pages}}, { link => '...' } if $is_excess;
  98         }
  99
 100         my $template=template("recentchanges.tmpl");
 101         $template->param(
 102                 title => "RecentChanges",
 103                 indexlink => indexlink(),
 104                 wikiname => $config{wikiname},
 105                 changelog => $changelog,
 106                 baseurl => baseurl(),
 107         );
 108         run_hooks(pagetemplate => sub {
 109                 shift->(page => "", destpage => "", template => $template);
 110         });
 111         print $q->header(-charset => 'utf-8'), $template->output;
 112 } #}}}
 113
 114 sub cgi_signin ($$) { #{{{
 115         my $q=shift;
 116         my $session=shift;
 117
 118         eval q{use CGI::FormBuilder};
 119         error($@) if $@;
 120         my $form = CGI::FormBuilder->new(
 121                 title => "signin",
 122                 header => 1,
 123                 charset => "utf-8",
 124                 method => 'POST',
 125                 required => 'NONE',
 126                 javascript => 0,
 127                 params => $q,
 128                 action => $config{cgiurl},
 129                 header => 0,
 130                 template => (-e "$config{templatedir}/signin.tmpl" ?
 131                              {template_params("signin.tmpl")} : ""),
 132                 stylesheet => baseurl()."style.css",
 133         );
 134         my $buttons=["Login"];
 135
 136         $form->field(name => "do", type => "hidden");
 137
 138         if ($q->param("do") ne "signin" && !$form->submitted) {
 139                 $form->text(gettext("You need to log in first."));
 140         }
 141
 142         run_hooks(formbuilder_setup => sub {
 143                 shift->(form => $form, cgi => $q, session => $session);
 144         });
 145
 146         decode_form_utf8($form);
 147
 148         if (exists $hooks{formbuilder}) {
 149                 run_hooks(formbuilder => sub {
 150                         shift->(form => $form, cgi => $q, session => $session,
 151                                 buttons => $buttons);
 152                 });
 153         }
 154         else {
 155                 if ($form->submitted) {
 156                         $form->validate;
 157                 }
 158                 printheader($session);
 159                 print misctemplate($form->title, $form->render(submit => $buttons));
 160         }
 161 } #}}}
 162
 163 sub cgi_postsignin ($$) { #{{{
 164         my $q=shift;
 165         my $session=shift;
 166
 167         # Continue with whatever was being done before the signin process.
 168         if (defined $q->param("do") && $q->param("do") ne "signin" &&
 169             defined $session->param("postsignin")) {
 170                 my $postsignin=CGI->new($session->param("postsignin"));
 171                 $session->clear("postsignin");
 172                 cgi($postsignin, $session);
 173                 cgi_savesession($session);
 174                 exit;
 175         }
 176         else {
 177                 redirect($q, $config{url});
 178         }
 179 } #}}}
 180
 181 sub cgi_prefs ($$) { #{{{
 182         my $q=shift;
 183         my $session=shift;
 184
 185         eval q{use CGI::FormBuilder};
 186         error($@) if $@;
 187         my $form = CGI::FormBuilder->new(
 188                 title => "preferences",
 189                 header => 0,
 190                 charset => "utf-8",
 191                 method => 'POST',
 192                 validate => {
 193                         email => 'EMAIL',
 194                 },
 195                 required => 'NONE',
 196                 javascript => 0,
 197                 params => $q,
 198                 action => $config{cgiurl},
 199                 template => (-e "$config{templatedir}/prefs.tmpl" ?
 200                              {template_params("prefs.tmpl")} : ""),
 201                 stylesheet => baseurl()."style.css",
 202         );
 203         my $buttons=["Save Preferences", "Logout", "Cancel"];
 204
 205         run_hooks(formbuilder_setup => sub {
 206                 shift->(form => $form, cgi => $q, session => $session);
 207         });
 208
 209         $form->field(name => "do", type => "hidden");
 210         $form->field(name => "email", size => 50);
 211         $form->field(name => "subscriptions", size => 50,
 212                 comment => "(".htmllink("", "", "PageSpec", 1).")");
 213         $form->field(name => "locked_pages", size => 50,
 214                 comment => "(".htmllink("", "", "PageSpec", 1).")");
 215         $form->field(name => "banned_users", size => 50);
 216
 217         my $user_name=$session->param("name");
 218         if (! is_admin($user_name)) {
 219                 $form->field(name => "locked_pages", type => "hidden");
 220                 $form->field(name => "banned_users", type => "hidden");
 221         }
 222
 223         if (! $form->submitted) {
 224                 $form->field(name => "email", force => 1,
 225                         value => userinfo_get($user_name, "email"));
 226                 $form->field(name => "subscriptions", force => 1,
 227                         value => userinfo_get($user_name, "subscriptions"));
 228                 $form->field(name => "locked_pages", force => 1,
 229                         value => userinfo_get($user_name, "locked_pages"));
 230                 if (is_admin($user_name)) {
 231                         $form->field(name => "banned_users", force => 1,
 232                                 value => join(" ", get_banned_users()));
 233                 }
 234         }
 235
 236         decode_form_utf8($form);
 237
 238         if ($form->submitted eq 'Logout') {
 239                 $session->delete();
 240                 redirect($q, $config{url});
 241                 return;
 242         }
 243         elsif ($form->submitted eq 'Cancel') {
 244                 redirect($q, $config{url});
 245                 return;
 246         }
 247         elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
 248                 foreach my $field (qw(email subscriptions locked_pages)) {
 249                         if (defined $form->field($field) && length $form->field($field)) {
 250                                 userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
 251                         }
 252                 }
 253                 if (is_admin($user_name)) {
 254                         set_banned_users(grep { ! is_admin($_) }
 255                                         split(' ', $form->field("banned_users")));
 256                 }
 257                 $form->text(gettext("Preferences saved."));
 258         }
 259
 260         if (exists $hooks{formbuilder}) {
 261                 run_hooks(formbuilder => sub {
 262                         shift->(form => $form, cgi => $q, session => $session,
 263                                 buttons => $buttons);
 264                 });
 265         }
 266         else {
 267                 printheader($session);
 268                 print misctemplate($form->title, $form->render(submit => $buttons));
 269         }
 270 } #}}}
 271
 272 sub cgi_editpage ($$) { #{{{
 273         my $q=shift;
 274         my $session=shift;
 275
 276         my @fields=qw(do rcsinfo subpage from page type editcontent comments);
 277         my @buttons=("Save Page", "Preview", "Cancel");
 278
 279         eval q{use CGI::FormBuilder};
 280         error($@) if $@;
 281         my $form = CGI::FormBuilder->new(
 282                 fields => \@fields,
 283                 header => 1,
 284                 charset => "utf-8",
 285                 method => 'POST',
 286                 validate => {
 287                         editcontent => '/.+/',
 288                 },
 289                 required => [qw{editcontent}],
 290                 javascript => 0,
 291                 params => $q,
 292                 action => $config{cgiurl},
 293                 table => 0,
 294                 template => (-e "$config{templatedir}/editpage.tmpl" ?
 295                                 {template_params("editpage.tmpl")} : ""),
 296         );
 297
 298         run_hooks(formbuilder_setup => sub {
 299                 shift->(form => $form, cgi => $q, session => $session);
 300         });
 301
 302         decode_form_utf8($form);
 303
 304         # This untaint is safe because titlepage removes any problematic
 305         # characters.
 306         my ($page)=$form->field('page');
 307         $page=titlepage(possibly_foolish_untaint($page));
 308         if (! defined $page || ! length $page || file_pruned($page, $config{srcdir}) || $page=~/^\//) {
 309                 error("bad page name");
 310         }
 311
 312         my $from;
 313         if (defined $form->field('from')) {
 314                 ($from)=$form->field('from')=~/$config{wiki_file_regexp}/;
 315         }
 316
 317         my $file;
 318         my $type;
 319         if (exists $pagesources{$page}) {
 320                 $file=$pagesources{$page};
 321                 $type=pagetype($file);
 322         }
 323         else {
 324                 $type=$form->param('type');
 325                 if (defined $type && length $type && $hooks{htmlize}{$type}) {
 326                         $type=possibly_foolish_untaint($type);
 327                 }
 328                 elsif (defined $from) {
 329                         # favor the type of linking page
 330                         $type=pagetype($pagesources{$from});
 331                 }
 332                 $type=$config{default_pageext} unless defined $type;
 333                 $file=$page.".".$type;
 334         }
 335
 336         my $newfile=0;
 337         if (! -e "$config{srcdir}/$file") {
 338                 $newfile=1;
 339         }
 340
 341         $form->field(name => "do", type => 'hidden');
 342         $form->field(name => "from", type => 'hidden');
 343         $form->field(name => "rcsinfo", type => 'hidden');
 344         $form->field(name => "subpage", type => 'hidden');
 345         $form->field(name => "page", value => $page, force => 1);
 346         $form->field(name => "type", value => $type, force => 1);
 347         $form->field(name => "comments", type => "text", size => 80);
 348         $form->field(name => "editcontent", type => "textarea", rows => 20,
 349                 cols => 80);
 350         $form->tmpl_param("can_commit", $config{rcs});
 351         $form->tmpl_param("indexlink", indexlink());
 352         $form->tmpl_param("helponformattinglink",
 353                 htmllink("", "", "HelpOnFormatting", 1));
 354         $form->tmpl_param("baseurl", baseurl());
 355         if (! $form->submitted) {
 356                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 357                         force => 1);
 358         }
 359
 360         if ($form->submitted eq "Cancel") {
 361                 if ($newfile && defined $from) {
 362                         redirect($q, "$config{url}/".htmlpage($from));
 363                 }
 364                 elsif ($newfile) {
 365                         redirect($q, $config{url});
 366                 }
 367                 else {
 368                         redirect($q, "$config{url}/".htmlpage($page));
 369                 }
 370                 return;
 371         }
 372         elsif ($form->submitted eq "Preview") {
 373                 my $content=$form->field('editcontent');
 374                 my $comments=$form->field('comments');
 375                 $form->field(name => "editcontent",
 376                                 value => $content, force => 1);
 377                 $form->field(name => "comments",
 378                                 value => $comments, force => 1);
 379                 $config{rss}=$config{atom}=0; # avoid preview writing a feed!
 380                 $form->tmpl_param("page_preview",
 381                         htmlize($page, $type,
 382                         linkify($page, "",
 383                         preprocess($page, $page,
 384                         filter($page, $content)))));
 385         }
 386         else {
 387                 $form->tmpl_param("page_preview", "");
 388         }
 389         $form->tmpl_param("page_conflict", "");
 390
 391         if (! $form->submitted || $form->submitted eq "Preview" ||
 392             ! $form->validate) {
 393                 if ($form->field("do") eq "create") {
 394                         my @page_locs;
 395                         my $best_loc;
 396                         if (! defined $from || ! length $from ||
 397                             $from ne $form->field('from') ||
 398                             file_pruned($from, $config{srcdir}) ||
 399                             $from=~/^\// ||
 400                             $form->submitted eq "Preview") {
 401                                 @page_locs=$best_loc=$page;
 402                         }
 403                         else {
 404                                 my $dir=$from."/";
 405                                 $dir=~s![^/]+/+$!!;
 406
 407                                 if ((defined $form->field('subpage') && length $form->field('subpage')) ||
 408                                     $page eq gettext('discussion')) {
 409                                         $best_loc="$from/$page";
 410                                 }
 411                                 else {
 412                                         $best_loc=$dir.$page;
 413                                 }
 414
 415                                 push @page_locs, $dir.$page;
 416                                 push @page_locs, "$from/$page";
 417                                 while (length $dir) {
 418                                         $dir=~s![^/]+/+$!!;
 419                                         push @page_locs, $dir.$page;
 420                                 }
 421                         }
 422                         push @page_locs, "$config{userdir}/$page"
 423                                 if length $config{userdir};
 424
 425                         @page_locs = grep {
 426                                 ! exists $pagecase{lc $_} &&
 427                                 ! page_locked($_, $session, 1)
 428                         } @page_locs;
 429
 430                         if (! @page_locs) {
 431                                 # hmm, someone else made the page in the
 432                                 # meantime?
 433                                 redirect($q, "$config{url}/".htmlpage($page));
 434                                 return;
 435                         }
 436
 437                         my @page_types;
 438                         if (exists $hooks{htmlize}) {
 439                                 @page_types=keys %{$hooks{htmlize}};
 440                         }
 441
 442                         $form->tmpl_param("page_select", 1);
 443                         $form->field(name => "page", type => 'select',
 444                                 options => \@page_locs, value => $best_loc);
 445                         $form->field(name => "type", type => 'select',
 446                                 options => \@page_types);
 447                         $form->title(sprintf(gettext("creating %s"), pagetitle($page)));
 448                 }
 449                 elsif ($form->field("do") eq "edit") {
 450                         page_locked($page, $session);
 451                         if (! defined $form->field('editcontent') ||
 452                             ! length $form->field('editcontent')) {
 453                                 my $content="";
 454                                 if (exists $pagesources{$page}) {
 455                                         $content=readfile(srcfile($pagesources{$page}));
 456                                         $content=~s/\n/\r\n/g;
 457                                 }
 458                                 $form->field(name => "editcontent", value => $content,
 459                                         force => 1);
 460                         }
 461                         $form->tmpl_param("page_select", 0);
 462                         $form->field(name => "page", type => 'hidden');
 463                         $form->field(name => "type", type => 'hidden');
 464                         $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
 465                 }
 466
 467                 print $form->render(submit => \@buttons);
 468         }
 469         else {
 470                 # save page
 471                 page_locked($page, $session);
 472
 473                 my $content=$form->field('editcontent');
 474
 475                 $content=~s/\r\n/\n/g;
 476                 $content=~s/\r/\n/g;
 477                 writefile($file, $config{srcdir}, $content);
 478
 479                 if ($config{rcs}) {
 480                         my $message="";
 481                         if (defined $form->field('comments') &&
 482                             length $form->field('comments')) {
 483                                 $message=$form->field('comments');
 484                         }
 485
 486                         if ($newfile) {
 487                                 rcs_add($file);
 488                         }
 489                         # prevent deadlock with post-commit hook
 490                         unlockwiki();
 491                         # presumably the commit will trigger an update
 492                         # of the wiki
 493                         my $conflict=rcs_commit($file, $message,
 494                                 $form->field("rcsinfo"),
 495                                 $session->param("name"), $ENV{REMOTE_ADDR});
 496
 497                         if (defined $conflict) {
 498                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
 499                                         force => 1);
 500                                 $form->tmpl_param("page_conflict", 1);
 501                                 $form->field("editcontent", value => $conflict, force => 1);
 502                                 $form->field(name => "comments", value => $form->field('comments'), force => 1);
 503                                 $form->field("do", "edit)");
 504                                 $form->tmpl_param("page_select", 0);
 505                                 $form->field(name => "page", type => 'hidden');
 506                                 $form->field(name => "type", type => 'hidden');
 507                                 $form->title(sprintf(gettext("editing %s"), $page));
 508                                 print $form->render(submit => \@buttons);
 509                                 return;
 510                         }
 511                 }
 512                 else {
 513                         require IkiWiki::Render;
 514                         refresh();
 515                         saveindex();
 516                 }
 517
 518                 # The trailing question mark tries to avoid broken
 519                 # caches and get the most recent version of the page.
 520                 redirect($q, "$config{url}/".htmlpage($page)."?updated");
 521         }
 522 } #}}}
 523
 524 sub cgi_getsession ($) { #{{{
 525         my $q=shift;
 526
 527         eval q{use CGI::Session};
 528         CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
 529
 530         my $oldmask=umask(077);
 531         my $session = CGI::Session->new("driver:DB_File", $q,
 532                 { FileName => "$config{wikistatedir}/sessions.db" });
 533         umask($oldmask);
 534
 535         return $session;
 536 } #}}}
 537
 538 sub cgi_savesession ($) { #{{{
 539         my $session=shift;
 540
 541         # Force session flush with safe umask.
 542         my $oldmask=umask(077);
 543         $session->flush;
 544         umask($oldmask);
 545 }
 546
 547 sub cgi (;$$) { #{{{
 548         my $q=shift;
 549         my $session=shift;
 550
 551         if (! $q) {
 552                 eval q{use CGI};
 553                 error($@) if $@;
 554
 555                 $q=CGI->new;
 556
 557                 run_hooks(cgi => sub { shift->($q) });
 558         }
 559
 560         my $do=$q->param('do');
 561         if (! defined $do || ! length $do) {
 562                 my $error = $q->cgi_error;
 563                 if ($error) {
 564                         error("Request not processed: $error");
 565                 }
 566                 else {
 567                         error("\"do\" parameter missing");
 568                 }
 569         }
 570
 571         # Things that do not need a session.
 572         if ($do eq 'recentchanges') {
 573                 cgi_recentchanges($q);
 574                 return;
 575         }
 576         elsif ($do eq 'hyperestraier') {
 577                 cgi_hyperestraier();
 578         }
 579
 580         # Need to lock the wiki before getting a session.
 581         lockwiki();
 582
 583         if (! $session) {
 584                 $session=cgi_getsession($q);
 585         }
 586
 587         # Auth hooks can sign a user in.
 588         if ($do ne 'signin' && ! defined $session->param("name")) {
 589                 run_hooks(auth => sub {
 590                         shift->($q, $session)
 591                 });
 592                 if (defined $session->param("name")) {
 593                         # Make sure whatever user was authed is in the
 594                         # userinfo db.
 595                         if (! userinfo_get($session->param("name"), "regdate")) {
 596                                 userinfo_setall($session->param("name"), {
 597                                         email => "",
 598                                         password => "",
 599                                         regdate => time,
 600                                 });
 601                         }
 602                 }
 603         }
 604
 605         # Everything below this point needs the user to be signed in.
 606         if (((! $config{anonok} || $do eq 'prefs') &&
 607              (! defined $session->param("name") ||
 608              ! userinfo_get($session->param("name"), "regdate")))
 609             || $do eq 'signin') {
 610                 if ($do ne 'signin' && ! defined $session->param("postsignin")) {
 611                         $session->param(postsignin => $ENV{QUERY_STRING});
 612                 }
 613                 cgi_signin($q, $session);
 614                 cgi_savesession($session);
 615                 return;
 616         }
 617         elsif (defined $session->param("postsignin")) {
 618                 cgi_postsignin($q, $session);
 619         }
 620
 621         if (defined $session->param("name") && userinfo_get($session->param("name"), "banned")) {
 622                 print $q->header(-status => "403 Forbidden");
 623                 $session->delete();
 624                 print gettext("You are banned.");
 625                 cgi_savesession($session);
 626                 exit;
 627         }
 628
 629         if ($do eq 'create' || $do eq 'edit') {
 630                 cgi_editpage($q, $session);
 631         }
 632         elsif ($do eq 'prefs') {
 633                 cgi_prefs($q, $session);
 634         }
 635         elsif ($do eq 'blog') {
 636                 my $page=titlepage(decode_utf8($q->param('title')));
 637                 $page=~s/(\/)/"__".ord($1)."__"/eg; # escape slashes too
 638                 # if the page already exists, munge it to be unique
 639                 my $from=$q->param('from');
 640                 my $add="";
 641                 while (exists $pagecase{lc "$from/$page$add"}) {
 642                         $add=1 unless length $add;
 643                         $add++;
 644                 }
 645                 $q->param('page', $page.$add);
 646                 # now run same as create
 647                 $q->param('do', 'create');
 648                 cgi_editpage($q, $session);
 649         }
 650         else {
 651                 error("unknown do parameter");
 652         }
 653 } #}}}
 654
 655 sub userlink ($) { #{{{
 656         my $user=shift;
 657
 658         eval q{use CGI 'escapeHTML'};
 659         error($@) if $@;
 660         if ($user =~ m!^https?://! &&
 661             eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
 662                 # Munge user-urls, as used by eg, OpenID.
 663                 my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
 664                 my $display=$oid->display;
 665                 # Convert "user.somehost.com" to "user [somehost.com]".
 666                 if ($display !~ /\[/) {
 667                         $display=~s/^(.*?)\.([^.]+\.[a-z]+)$/$1 [$2]/;
 668                 }
 669                 # Convert "http://somehost.com/user" to "user [somehost.com]".
 670                 if ($display !~ /\[/) {
 671                         $display=~s/^https?:\/\/(.+)\/([^\/]+)$/$2 [$1]/;
 672                 }
 673                 $display=~s!^https?://!!; # make sure this is removed
 674                 return "<a href=\"$user\">".escapeHTML($display)."</a>";
 675         }
 676         else {
 677                 return htmllink("", "", escapeHTML(
 678                         length $config{userdir} ? $config{userdir}."/".$user : $user
 679                 ), 1);
 680         }
 681 } #}}}
 682
 683 1