]> git.vanrenterghem.biz Git - git.ikiwiki.info.git/blobdiff - IkiWiki/CGI.pm
remove incorrect comment
[git.ikiwiki.info.git] / IkiWiki / CGI.pm
index 31b1f748a6b3a1c0a8fa009ed54f476ecc02d5d8..a050434782c6445d8cb9d05738305bee3ea5833e 100644 (file)
@@ -1,5 +1,7 @@
 #!/usr/bin/perl
 
+package IkiWiki;
+
 use warnings;
 use strict;
 use IkiWiki;
@@ -7,8 +9,6 @@ use IkiWiki::UserInfo;
 use open qw{:utf8 :std};
 use Encode;
 
-package IkiWiki;
-
 sub printheader ($) { #{{{
        my $session=shift;
        
@@ -18,9 +18,25 @@ sub printheader ($) { #{{{
        } else {
                print $session->header(-charset => 'utf-8');
        }
-
 } #}}}
 
+sub showform ($$$$;@) { #{{{
+       my $form=shift;
+       my $buttons=shift;
+       my $session=shift;
+       my $cgi=shift;
+
+       if (exists $hooks{formbuilder}) {
+               run_hooks(formbuilder => sub {
+                       shift->(form => $form, cgi => $cgi, session => $session,
+                               buttons => $buttons);
+               });
+       }
+
+       printheader($session);
+       print misctemplate($form->title, $form->render(submit => $buttons), @_);
+}
+
 sub redirect ($$) { #{{{
        my $q=shift;
        my $url=shift;
@@ -43,73 +59,43 @@ sub check_canedit ($$$;$) { #{{{
        run_hooks(canedit => sub {
                return if defined $canedit;
                my $ret=shift->($page, $q, $session);
-               if (defined $ret && $ret eq "") {
-                       $canedit=1;
-               }
-               elsif (defined $ret) {
-                       $canedit=0;
-                       error($ret) unless $nonfatal;
+               if (defined $ret) {
+                       if ($ret eq "") {
+                               $canedit=1;
+                       }
+                       elsif (ref $ret eq 'CODE') {
+                               $ret->() unless $nonfatal;
+                               $canedit=0;
+                       }
+                       elsif (defined $ret) {
+                               error($ret) unless $nonfatal;
+                               $canedit=0;
+                       }
                }
        });
        return $canedit;
 } #}}}
 
-sub decode_form_utf8 ($) { #{{{
-       my $form = shift;
-       foreach my $f ($form->field) {
-               next if Encode::is_utf8(scalar $form->field($f));
-               $form->field(name  => $f,
-                            value => decode_utf8($form->field($f)),
-                            force => 1,
-                           );
+sub decode_cgi_utf8 ($) { #{{{
+       # decode_form_utf8 method is needed for 5.10
+       if ($] < 5.01) {
+               my $cgi = shift;
+               foreach my $f ($cgi->param) {
+                       $cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
+               }
        }
 } #}}}
 
-sub cgi_recentchanges ($) { #{{{
-       my $q=shift;
-       
-       # Optimisation: building recentchanges means calculating lots of
-       # links. Memoizing htmllink speeds it up a lot (can't be memoized
-       # during page builds as the return values may change, but they
-       # won't here.)
-       eval q{use Memoize};
-       error($@) if $@;
-       memoize("htmllink");
-
-       eval q{use Time::Duration};
-       error($@) if $@;
-
-       my $changelog=[rcs_recentchanges(100)];
-       foreach my $change (@$changelog) {
-               $change->{when} = concise(ago($change->{when}));
-
-               $change->{user} = userlink($change->{user});
-
-               my $is_excess = exists $change->{pages}[10]; # limit pages to first 10
-               delete @{$change->{pages}}[10 .. @{$change->{pages}}] if $is_excess;
-               $change->{pages} = [
-                       map {
-                               $_->{link} = htmllink("", "", $_->{page},
-                                       noimageinline => 1,
-                                       linktext => pagetitle($_->{page}));
-                               $_;
-                       } @{$change->{pages}}
-               ];
-               push @{$change->{pages}}, { link => '...' } if $is_excess;
-       }
-
-       my $template=template("recentchanges.tmpl"); 
-       $template->param(
-               title => "RecentChanges",
-               indexlink => indexlink(),
-               wikiname => $config{wikiname},
-               changelog => $changelog,
-               baseurl => baseurl(),
-       );
-       run_hooks(pagetemplate => sub {
-               shift->(page => "", destpage => "", template => $template);
-       });
-       print $q->header(-charset => 'utf-8'), $template->output;
+sub decode_form_utf8 ($) { #{{{
+       if ($] >= 5.01) {
+               my $form = shift;
+               foreach my $f ($form->field) {
+                       $form->field(name  => $f,
+                                    value => decode_utf8($form->field($f)),
+                                    force => 1,
+                       );
+               }
+       }
 } #}}}
 
 # Check if the user is signed in. If not, redirect to the signin form and
@@ -120,9 +106,7 @@ sub needsignin ($$) { #{{{
 
        if (! defined $session->param("name") ||
            ! userinfo_get($session->param("name"), "regdate")) {
-               if (! defined $session->param("postsignin")) {
-                       $session->param(postsignin => $ENV{QUERY_STRING});
-               }
+               $session->param(postsignin => $ENV{QUERY_STRING});
                cgi_signin($q, $session);
                cgi_savesession($session);
                exit;
@@ -133,6 +117,7 @@ sub cgi_signin ($$) { #{{{
        my $q=shift;
        my $session=shift;
 
+       decode_cgi_utf8($q);
        eval q{use CGI::FormBuilder};
        error($@) if $@;
        my $form = CGI::FormBuilder->new(
@@ -156,25 +141,18 @@ sub cgi_signin ($$) { #{{{
        $form->field(name => "do", type => "hidden", value => "signin",
                force => 1);
        
+       decode_form_utf8($form);
        run_hooks(formbuilder_setup => sub {
-               shift->(form => $form, cgi => $q, session => $session);
+               shift->(form => $form, cgi => $q, session => $session,
+                       buttons => $buttons);
        });
-       
        decode_form_utf8($form);
 
-       if (exists $hooks{formbuilder}) {
-               run_hooks(formbuilder => sub {
-                       shift->(form => $form, cgi => $q, session => $session,
-                               buttons => $buttons);
-               });
-       }
-       else {
-               if ($form->submitted) {
-                       $form->validate;
-               }
-               printheader($session);
-               print misctemplate($form->title, $form->render(submit => $buttons));
+       if ($form->submitted) {
+               $form->validate;
        }
+
+       showform($form, $buttons, $session, $q);
 } #}}}
 
 sub cgi_postsignin ($$) { #{{{
@@ -190,9 +168,7 @@ sub cgi_postsignin ($$) { #{{{
                exit;
        }
        else {
-               # This can occur, for example, if a user went to the signin
-               # url via a bookmark.
-               redirect($q, $config{url});
+               error(gettext("login failed, perhaps you need to turn on cookies?"));
        }
 } #}}}
 
@@ -201,6 +177,17 @@ sub cgi_prefs ($$) { #{{{
        my $session=shift;
 
        needsignin($q, $session);
+       decode_cgi_utf8($q);
+       
+       # The session id is stored on the form and checked to
+       # guard against CSRF.
+       my $sid=$q->param('sid');
+       if (! defined $sid) {
+               $q->delete_all;
+       }
+       elsif ($sid ne $session->id) {
+               error(gettext("Your login session has expired."));
+       }
 
        eval q{use CGI::FormBuilder};
        error($@) if $@;
@@ -226,37 +213,43 @@ sub cgi_prefs ($$) { #{{{
                ],
        );
        my $buttons=["Save Preferences", "Logout", "Cancel"];
-
+       
+       decode_form_utf8($form);
        run_hooks(formbuilder_setup => sub {
-               shift->(form => $form, cgi => $q, session => $session);
+               shift->(form => $form, cgi => $q, session => $session,
+                       buttons => $buttons);
        });
+       decode_form_utf8($form);
        
-       $form->field(name => "do", type => "hidden");
+       $form->field(name => "do", type => "hidden", value => "prefs",
+               force => 1);
+       $form->field(name => "sid", type => "hidden", value => $session->id,
+               force => 1);
        $form->field(name => "email", size => 50, fieldset => "preferences");
-       $form->field(name => "subscriptions", size => 50,
-               fieldset => "preferences",
-               comment => "(".htmllink("", "", "PageSpec", noimageinline => 1).")");
-       $form->field(name => "banned_users", size => 50,
-               fieldset => "admin");
        
        my $user_name=$session->param("name");
+
+       # XXX deprecated, should be removed eventually
+       $form->field(name => "banned_users", size => 50, fieldset => "admin");
        if (! is_admin($user_name)) {
                $form->field(name => "banned_users", type => "hidden");
        }
-
        if (! $form->submitted) {
                $form->field(name => "email", force => 1,
                        value => userinfo_get($user_name, "email"));
-               $form->field(name => "subscriptions", force => 1,
-                       value => userinfo_get($user_name, "subscriptions"));
                if (is_admin($user_name)) {
-                       $form->field(name => "banned_users", force => 1,
-                               value => join(" ", get_banned_users()));
+                       my $value=join(" ", get_banned_users());
+                       if (length $value) {
+                               $form->field(name => "banned_users", force => 1,
+                                       value => join(" ", get_banned_users()),
+                                       comment => "deprecated; please move to banned_users in setup file");
+                       }
+                       else {
+                               $form->field(name => "banned_users", type => "hidden");
+                       }
                }
        }
        
-       decode_form_utf8($form);
-       
        if ($form->submitted eq 'Logout') {
                $session->delete();
                redirect($q, $config{url});
@@ -267,49 +260,42 @@ sub cgi_prefs ($$) { #{{{
                return;
        }
        elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
-               foreach my $field (qw(email subscriptions)) {
-                       if (defined $form->field($field) && length $form->field($field)) {
-                               userinfo_set($user_name, $field, $form->field($field)) ||
-                                       error("failed to set $field");
-                       }
+               if (defined $form->field('email')) {
+                       userinfo_set($user_name, 'email', $form->field('email')) ||
+                               error("failed to set email");
                }
+
+               # XXX deprecated, should be removed eventually
                if (is_admin($user_name)) {
                        set_banned_users(grep { ! is_admin($_) }
                                        split(' ',
                                                $form->field("banned_users"))) ||
                                error("failed saving changes");
+                       if (! length $form->field("banned_users")) {
+                               $form->field(name => "banned_users", type => "hidden");
+                       }
                }
+
                $form->text(gettext("Preferences saved."));
        }
        
-       if (exists $hooks{formbuilder}) {
-               run_hooks(formbuilder => sub {
-                       shift->(form => $form, cgi => $q, session => $session,
-                               buttons => $buttons);
-               });
-       }
-       else {
-               printheader($session);
-               print misctemplate($form->title, $form->render(submit => $buttons));
-       }
+       showform($form, $buttons, $session, $q);
 } #}}}
 
 sub cgi_editpage ($$) { #{{{
        my $q=shift;
        my $session=shift;
+       
+       decode_cgi_utf8($q);
 
        my @fields=qw(do rcsinfo subpage from page type editcontent comments);
        my @buttons=("Save Page", "Preview", "Cancel");
-       
        eval q{use CGI::FormBuilder};
        error($@) if $@;
        my $form = CGI::FormBuilder->new(
                fields => \@fields,
                charset => "utf-8",
                method => 'POST',
-               validate => {
-                       editcontent => '/.+/',
-               },
                required => [qw{editcontent}],
                javascript => 0,
                params => $q,
@@ -320,19 +306,23 @@ sub cgi_editpage ($$) { #{{{
                wikiname => $config{wikiname},
        );
        
+       decode_form_utf8($form);
        run_hooks(formbuilder_setup => sub {
-               shift->(form => $form, cgi => $q, session => $session);
+               shift->(form => $form, cgi => $q, session => $session,
+                       buttons => \@buttons);
        });
-       
        decode_form_utf8($form);
        
-       # This untaint is safe because titlepage removes any problematic
-       # characters.
-       my ($page)=$form->field('page');
-       $page=titlepage(possibly_foolish_untaint($page));
-       if (! defined $page || ! length $page || file_pruned($page, $config{srcdir}) || $page=~/^\//) {
+       # This untaint is safe because we check file_pruned.
+       my $page=$form->field('page');
+       $page=possibly_foolish_untaint($page);
+       my $absolute=($page =~ s#^/+##);
+       if (! defined $page || ! length $page ||
+           file_pruned($page, $config{srcdir})) {
                error("bad page name");
        }
+
+       my $baseurl=$config{url}."/".htmlpage($page);
        
        my $from;
        if (defined $form->field('from')) {
@@ -344,20 +334,21 @@ sub cgi_editpage ($$) { #{{{
        if (exists $pagesources{$page} && $form->field("do") ne "create") {
                $file=$pagesources{$page};
                $type=pagetype($file);
-               if (! defined $type) {
+               if (! defined $type || $type=~/^_/) {
                        error(sprintf(gettext("%s is not an editable page"), $page));
                }
                if (! $form->submitted) {
                        $form->field(name => "rcsinfo",
                                value => rcs_prepedit($file), force => 1);
                }
+               $form->field(name => "editcontent", validate => '/.*/');
        }
        else {
                $type=$form->param('type');
                if (defined $type && length $type && $hooks{htmlize}{$type}) {
                        $type=possibly_foolish_untaint($type);
                }
-               elsif (defined $from) {
+               elsif (defined $from && exists $pagesources{$from}) {
                        # favor the type of linking page
                        $type=pagetype($pagesources{$from});
                }
@@ -366,13 +357,16 @@ sub cgi_editpage ($$) { #{{{
                if (! $form->submitted) {
                        $form->field(name => "rcsinfo", value => "", force => 1);
                }
+               $form->field(name => "editcontent", validate => '/.+/');
        }
 
        $form->field(name => "do", type => 'hidden');
+       $form->field(name => "sid", type => "hidden", value => $session->id,
+               force => 1);
        $form->field(name => "from", type => 'hidden');
        $form->field(name => "rcsinfo", type => 'hidden');
        $form->field(name => "subpage", type => 'hidden');
-       $form->field(name => "page", value => pagetitle($page, 1), force => 1);
+       $form->field(name => "page", value => $page, force => 1);
        $form->field(name => "type", value => $type, force => 1);
        $form->field(name => "comments", type => "text", size => 80);
        $form->field(name => "editcontent", type => "textarea", rows => 20,
@@ -380,8 +374,9 @@ sub cgi_editpage ($$) { #{{{
        $form->tmpl_param("can_commit", $config{rcs});
        $form->tmpl_param("indexlink", indexlink());
        $form->tmpl_param("helponformattinglink",
-               htmllink("", "", "HelpOnFormatting", noimageinline => 1));
-       $form->tmpl_param("baseurl", baseurl());
+               htmllink($page, $page, "ikiwiki/formatting",
+                       noimageinline => 1,
+                       linktext => "FormattingHelp"));
        
        if ($form->submitted eq "Cancel") {
                if ($form->field("do") eq "create" && defined $from) {
@@ -396,26 +391,53 @@ sub cgi_editpage ($$) { #{{{
                return;
        }
        elsif ($form->submitted eq "Preview") {
-               $form->tmpl_param("page_preview",
-                       htmlize($page, $type,
-                       linkify($page, "",
+               my $new=not exists $pagesources{$page};
+               if ($new) {
+                       # temporarily record its type
+                       $pagesources{$page}=$page.".".$type;
+               }
+
+               my $content=$form->field('editcontent');
+
+               run_hooks(editcontent => sub {
+                       $content=shift->(
+                               content => $content,
+                               page => $page,
+                               cgi => $q,
+                               session => $session,
+                       );
+               });
+               my $preview=htmlize($page, $page, $type,
+                       linkify($page, $page,
                        preprocess($page, $page,
-                       filter($page, $page, $form->field('editcontent')), 0, 1))));
+                       filter($page, $page, $content), 0, 1)));
+               run_hooks(format => sub {
+                       $preview=shift->(
+                               page => $page,
+                               content => $preview,
+                       );
+               });
+               $form->tmpl_param("page_preview", $preview);
+       
+               if ($new) {
+                       delete $pagesources{$page};
+               }
+               # previewing may have created files on disk
+               saveindex();
        }
-       else {
+       elsif ($form->submitted eq "Save Page") {
                $form->tmpl_param("page_preview", "");
        }
-       $form->tmpl_param("page_conflict", "");
        
-       if (! $form->submitted || $form->submitted eq "Preview" || 
-           ! $form->validate) {
+       if ($form->submitted ne "Save Page" || ! $form->validate) {
                if ($form->field("do") eq "create") {
                        my @page_locs;
                        my $best_loc;
                        if (! defined $from || ! length $from ||
                            $from ne $form->field('from') ||
                            file_pruned($from, $config{srcdir}) ||
-                           $from=~/^\// ||
+                           $from=~/^\// || 
+                           $absolute ||
                            $form->submitted eq "Preview") {
                                @page_locs=$best_loc=$page;
                        }
@@ -437,9 +459,10 @@ sub cgi_editpage ($$) { #{{{
                                        $dir=~s![^/]+/+$!!;
                                        push @page_locs, $dir.$page;
                                }
+                       
+                               push @page_locs, "$config{userdir}/$page"
+                                       if length $config{userdir};
                        }
-                       push @page_locs, "$config{userdir}/$page"
-                               if length $config{userdir};
 
                        @page_locs = grep {
                                ! exists $pagecase{lc $_}
@@ -447,8 +470,16 @@ sub cgi_editpage ($$) { #{{{
                        if (! @page_locs) {
                                # hmm, someone else made the page in the
                                # meantime?
-                               redirect($q, "$config{url}/".htmlpage($page));
-                               return;
+                               if ($form->submitted eq "Preview") {
+                                       # let them go ahead with the edit
+                                       # and resolve the conflict at save
+                                       # time
+                                       @page_locs=$page;
+                               }
+                               else {
+                                       redirect($q, "$config{url}/".htmlpage($page));
+                                       return;
+                               }
                        }
 
                        my @editable_locs = grep {
@@ -461,13 +492,14 @@ sub cgi_editpage ($$) { #{{{
                        
                        my @page_types;
                        if (exists $hooks{htmlize}) {
-                               @page_types=keys %{$hooks{htmlize}};
+                               @page_types=grep { !/^_/ }
+                                       keys %{$hooks{htmlize}};
                        }
                        
                        $form->tmpl_param("page_select", 1);
                        $form->field(name => "page", type => 'select',
-                               options => [ map { pagetitle($_, 1) } @editable_locs ],
-                               value => pagetitle($best_loc, 1));
+                               options => [ map { [ $_, pagetitle($_, 1) ] } @editable_locs ],
+                               value => $best_loc);
                        $form->field(name => "type", type => 'select',
                                options => \@page_types);
                        $form->title(sprintf(gettext("creating %s"), pagetitle($page)));
@@ -491,28 +523,37 @@ sub cgi_editpage ($$) { #{{{
                        $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
                }
                
-               printheader($session);
-               print misctemplate($form->title, $form->render(submit => \@buttons));
+               showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
        }
        else {
                # save page
                check_canedit($page, $q, $session);
-               if (! -e "$config{srcdir}/$file" && 
-                   ! -e "$config{underlaydir}/$file" &&
-                   $form->field("do") ne "create") {
-                       $form->tmpl_param("page_gone", 1);
+       
+               # The session id is stored on the form and checked to
+               # guard against CSRF. But only if the user is logged in,
+               # as anonok can allow anonymous edits.
+               if (defined $session->param("name")) {
+                       my $sid=$q->param('sid');
+                       if (! defined $sid || $sid ne $session->id) {
+                               error(gettext("Your login session has expired."));
+                       }
+               }
+
+               my $exists=-e "$config{srcdir}/$file";
+
+               if ($form->field("do") ne "create" && ! $exists &&
+                   ! defined srcfile($file, 1)) {
+                       $form->tmpl_param("message", template("editpagegone.tmpl")->output);
                        $form->field(name => "do", value => "create", force => 1);
                        $form->tmpl_param("page_select", 0);
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));
-                       printheader($session);
-                       print misctemplate($form->title, $form->render(submit => \@buttons));
+                       showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
                        return;
                }
-               elsif (-e "$config{srcdir}/$file" &&
-                      $form->field("do") eq "create") {
-                       $form->tmpl_param("creation_conflict", 1);
+               elsif ($form->field("do") eq "create" && $exists) {
+                       $form->tmpl_param("message", template("editcreationconflict.tmpl")->output);
                        $form->field(name => "do", value => "edit", force => 1);
                        $form->tmpl_param("page_select", 0);
                        $form->field(name => "page", type => 'hidden');
@@ -522,15 +563,22 @@ sub cgi_editpage ($$) { #{{{
                                value => readfile("$config{srcdir}/$file").
                                         "\n\n\n".$form->field("editcontent"),
                                force => 1);
-                       printheader($session);
-                       print misctemplate($form->title, $form->render(submit => \@buttons));
+                       showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
                        return;
                }
                
                my $content=$form->field('editcontent');
-
+               run_hooks(editcontent => sub {
+                       $content=shift->(
+                               content => $content,
+                               page => $page,
+                               cgi => $q,
+                               session => $session,
+                       );
+               });
                $content=~s/\r\n/\n/g;
                $content=~s/\r/\n/g;
+               $content.="\n" if $content !~ /\n$/;
 
                $config{cgi}=0; # avoid cgi error message
                eval { writefile($file, $config{srcdir}, $content) };
@@ -538,15 +586,16 @@ sub cgi_editpage ($$) { #{{{
                if ($@) {
                        $form->field(name => "rcsinfo", value => rcs_prepedit($file),
                                force => 1);
-                       $form->tmpl_param("failed_save", 1);
-                       $form->tmpl_param("error_message", $@);
+                       my $mtemplate=template("editfailedsave.tmpl");
+                       $mtemplate->param(error_message => $@);
+                       $form->tmpl_param("message", $mtemplate->output);
                        $form->field("editcontent", value => $content, force => 1);
                        $form->tmpl_param("page_select", 0);
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));
-                       printheader($session);
-                       print misctemplate($form->title, $form->render(submit => \@buttons));
+                       showform($form, \@buttons, $session, $q,
+                               forcebaseurl => $baseurl);
                        return;
                }
                
@@ -558,13 +607,13 @@ sub cgi_editpage ($$) { #{{{
                                $message=$form->field('comments');
                        }
                        
-                       if (! -e "$config{srcdir}/$file") {
+                       if (! $exists) {
                                rcs_add($file);
                        }
 
                        # Prevent deadlock with post-commit hook by
                        # signaling to it that it should not try to
-                       # do anything (except send commit mails).
+                       # do anything.
                        disable_commit_hook();
                        $conflict=rcs_commit($file, $message,
                                $form->field("rcsinfo"),
@@ -583,15 +632,15 @@ sub cgi_editpage ($$) { #{{{
                if (defined $conflict) {
                        $form->field(name => "rcsinfo", value => rcs_prepedit($file),
                                force => 1);
-                       $form->tmpl_param("page_conflict", 1);
+                       $form->tmpl_param("message", template("editconflict.tmpl")->output);
                        $form->field("editcontent", value => $conflict, force => 1);
                        $form->field("do", "edit", force => 1);
                        $form->tmpl_param("page_select", 0);
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));
-                       printheader($session);
-                       print misctemplate($form->title, $form->render(submit => \@buttons));
+                       showform($form, \@buttons, $session, $q,
+                               forcebaseurl => $baseurl);
                        return;
                }
                else {
@@ -601,16 +650,42 @@ sub cgi_editpage ($$) { #{{{
                }
        }
 } #}}}
+       
+sub check_banned ($$) { #{{{
+       my $q=shift;
+       my $session=shift;
+
+       my $name=$session->param("name");
+       if (defined $name) {
+               # XXX banned in userinfo is deprecated, should be removed
+               # eventually, and only banned_users be checked.
+               if (userinfo_get($session->param("name"), "banned") ||
+                   grep { $name eq $_ } @{$config{banned_users}}) {
+                       print $q->header(-status => "403 Forbidden");
+                       $session->delete();
+                       print gettext("You are banned.");
+                       cgi_savesession($session);
+                       exit;
+               }
+       }
+}
 
 sub cgi_getsession ($) { #{{{
        my $q=shift;
 
        eval q{use CGI::Session};
+       error($@) if $@;
        CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
        
        my $oldmask=umask(077);
-       my $session = CGI::Session->new("driver:DB_File", $q,
-               { FileName => "$config{wikistatedir}/sessions.db" });
+       my $session = eval {
+               CGI::Session->new("driver:DB_File", $q,
+                       { FileName => "$config{wikistatedir}/sessions.db" })
+       };
+       if (! $session || $@) {
+               error($@." ".CGI::Session->errstr());
+       }
+       
        umask($oldmask);
 
        return $session;
@@ -629,11 +704,14 @@ sub cgi (;$$) { #{{{
        my $q=shift;
        my $session=shift;
 
+       eval q{use CGI};
+       error($@) if $@;
+       $CGI::DISABLE_UPLOADS=$config{cgi_disable_uploads};
+
        if (! $q) {
-               eval q{use CGI};
-               error($@) if $@;
-       
+               binmode(STDIN);
                $q=CGI->new;
+               binmode(STDIN, ":utf8");
        
                run_hooks(cgi => sub { shift->($q) });
        }
@@ -649,14 +727,9 @@ sub cgi (;$$) { #{{{
                }
        }
        
-       # Things that do not need a session.
-       if ($do eq 'recentchanges') {
-               cgi_recentchanges($q);
-               return;
-       }
-
        # Need to lock the wiki before getting a session.
        lockwiki();
+       loadindex();
        
        if (! $session) {
                $session=cgi_getsession($q);
@@ -680,63 +753,36 @@ sub cgi (;$$) { #{{{
                }
        }
        
-       if (defined $session->param("name") &&
-           userinfo_get($session->param("name"), "banned")) {
-               print $q->header(-status => "403 Forbidden");
-               $session->delete();
-               print gettext("You are banned.");
-               cgi_savesession($session);
-       }
-
+       check_banned($q, $session);
+       
        run_hooks(sessioncgi => sub { shift->($q, $session) });
 
        if ($do eq 'signin') {
                cgi_signin($q, $session);
                cgi_savesession($session);
        }
-       elsif (defined $session->param("postsignin")) {
-               cgi_postsignin($q, $session);
-       }
        elsif ($do eq 'prefs') {
                cgi_prefs($q, $session);
        }
        elsif ($do eq 'create' || $do eq 'edit') {
                cgi_editpage($q, $session);
        }
-       elsif ($do eq 'postsignin') {
-               error(gettext("login failed, perhaps you need to turn on cookies?"));
+       elsif (defined $session->param("postsignin") || $do eq 'postsignin') {
+               cgi_postsignin($q, $session);
        }
        else {
                error("unknown do parameter");
        }
 } #}}}
 
-sub userlink ($) { #{{{
-       my $user=shift;
+# Does not need to be called directly; all errors will go through here.
+sub cgierror ($) { #{{{
+       my $message=shift;
 
-       eval q{use CGI 'escapeHTML'};
-       error($@) if $@;
-       if ($user =~ m!^https?://! &&
-           eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
-               # Munge user-urls, as used by eg, OpenID.
-               my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
-               my $display=$oid->display;
-               # Convert "user.somehost.com" to "user [somehost.com]".
-               if ($display !~ /\[/) {
-                       $display=~s/^(.*?)\.([^.]+\.[a-z]+)$/$1 [$2]/;
-               }
-               # Convert "http://somehost.com/user" to "user [somehost.com]".
-               if ($display !~ /\[/) {
-                       $display=~s/^https?:\/\/(.+)\/([^\/]+)$/$2 [$1]/;
-               }
-               $display=~s!^https?://!!; # make sure this is removed
-               return "<a href=\"$user\">".escapeHTML($display)."</a>";
-       }
-       else {
-               return htmllink("", "", escapeHTML(
-                       length $config{userdir} ? $config{userdir}."/".$user : $user
-               ), noimageinline => 1);
-       }
+       print "Content-type: text/html\n\n";
+       print misctemplate(gettext("Error"),
+               "<p class=\"error\">".gettext("Error").": $message</p>");
+       die $@;
 } #}}}
 
 1