asking for clarification

[git.ikiwiki.info.git] / IkiWiki / CGI.pm

diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index 87cb9c3f3f12c637005cc06ecbbc04b18c5736c5..d805506aa9dd1a62940d82599375b8b284fde262 100644 (file)
--- a/IkiWiki/CGI.pm
+++ b/IkiWiki/CGI.pm
@@ -1,5 +1,7 @@
 #!/usr/bin/perl
 
 #!/usr/bin/perl
 

+package IkiWiki;
+

 use warnings;
 use strict;
 use IkiWiki;
 use warnings;
 use strict;
 use IkiWiki;


@@ -7,8 +9,6 @@ use IkiWiki::UserInfo;
 use open qw{:utf8 :std};
 use Encode;
 
 use open qw{:utf8 :std};
 use Encode;
 

-package IkiWiki;
-

 sub printheader ($) { #{{{
        my $session=shift;
        
 sub printheader ($) { #{{{
        my $session=shift;
        


@@ -21,7 +21,7 @@ sub printheader ($) { #{{{
 
 } #}}}
 
 
 } #}}}
 

-sub showform ($$$$) { #{{{
+sub showform ($$$$;@) { #{{{

        my $form=shift;
        my $buttons=shift;
        my $session=shift;
        my $form=shift;
        my $buttons=shift;
        my $session=shift;


@@ -35,7 +35,7 @@ sub showform ($$$$) { #{{{
        }
 
        printheader($session);
        }
 
        printheader($session);

-       print misctemplate($form->title, $form->render(submit => $buttons));
+       print misctemplate($form->title, $form->render(submit => $buttons), @_);

 }
 
 sub redirect ($$) { #{{{
 }
 
 sub redirect ($$) { #{{{


@@ -78,9 +78,24 @@ sub check_canedit ($$$;$) { #{{{
 } #}}}
 
 sub decode_cgi_utf8 ($) { #{{{
 } #}}}
 
 sub decode_cgi_utf8 ($) { #{{{

-       my $cgi = shift;
-       foreach my $f ($cgi->param) {
-               $cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
+       # 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 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,
+                       );
+               }

        }
 } #}}}
 
        }
 } #}}}
 


@@ -127,10 +142,12 @@ sub cgi_signin ($$) { #{{{
        $form->field(name => "do", type => "hidden", value => "signin",
                force => 1);
        
        $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,
                        buttons => $buttons);
        });
        run_hooks(formbuilder_setup => sub {
                shift->(form => $form, cgi => $q, session => $session,
                        buttons => $buttons);
        });

+       decode_form_utf8($form);

 
        if ($form->submitted) {
                $form->validate;
 
        if ($form->submitted) {
                $form->validate;


@@ -161,8 +178,18 @@ sub cgi_prefs ($$) { #{{{
        my $session=shift;
 
        needsignin($q, $session);
        my $session=shift;
 
        needsignin($q, $session);

-

        decode_cgi_utf8($q);
        decode_cgi_utf8($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 $@;
        my $form = CGI::FormBuilder->new(
        eval q{use CGI::FormBuilder};
        error($@) if $@;
        my $form = CGI::FormBuilder->new(


@@ -187,13 +214,18 @@ sub cgi_prefs ($$) { #{{{
                ],
        );
        my $buttons=["Save Preferences", "Logout", "Cancel"];
                ],
        );
        my $buttons=["Save Preferences", "Logout", "Cancel"];

-
+       
+       decode_form_utf8($form);

        run_hooks(formbuilder_setup => sub {
                shift->(form => $form, cgi => $q, session => $session,
                        buttons => $buttons);
        });
        run_hooks(formbuilder_setup => sub {
                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 => "banned_users", size => 50,
                fieldset => "admin");
        $form->field(name => "email", size => 50, fieldset => "preferences");
        $form->field(name => "banned_users", size => 50,
                fieldset => "admin");


@@ -241,15 +273,14 @@ sub cgi_prefs ($$) { #{{{
 sub cgi_editpage ($$) { #{{{
        my $q=shift;
        my $session=shift;
 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");
 
        my @fields=qw(do rcsinfo subpage from page type editcontent comments);
        my @buttons=("Save Page", "Preview", "Cancel");

-       
-       decode_cgi_utf8($q);

        eval q{use CGI::FormBuilder};
        error($@) if $@;
        my $form = CGI::FormBuilder->new(
        eval q{use CGI::FormBuilder};
        error($@) if $@;
        my $form = CGI::FormBuilder->new(

-               title => "editpage",

                fields => \@fields,
                charset => "utf-8",
                method => 'POST',
                fields => \@fields,
                charset => "utf-8",
                method => 'POST',


@@ -263,19 +294,23 @@ sub cgi_editpage ($$) { #{{{
                wikiname => $config{wikiname},
        );
        
                wikiname => $config{wikiname},
        );
        

+       decode_form_utf8($form);

        run_hooks(formbuilder_setup => sub {
                shift->(form => $form, cgi => $q, session => $session,
                        buttons => \@buttons);
        });
        run_hooks(formbuilder_setup => sub {
                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));
+       # 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 ||
        if (! defined $page || ! length $page ||

-           file_pruned($page, $config{srcdir}) || $page=~/^\//) {
+           file_pruned($page, $config{srcdir})) {

                error("bad page name");
        }
                error("bad page name");
        }

+
+       my $baseurl=$config{url}."/".htmlpage($page);

        
        my $from;
        if (defined $form->field('from')) {
        
        my $from;
        if (defined $form->field('from')) {


@@ -314,10 +349,12 @@ sub cgi_editpage ($$) { #{{{
        }
 
        $form->field(name => "do", type => 'hidden');
        }
 
        $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 => "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,
        $form->field(name => "type", value => $type, force => 1);
        $form->field(name => "comments", type => "text", size => 80);
        $form->field(name => "editcontent", type => "textarea", rows => 20,


@@ -325,10 +362,9 @@ sub cgi_editpage ($$) { #{{{
        $form->tmpl_param("can_commit", $config{rcs});
        $form->tmpl_param("indexlink", indexlink());
        $form->tmpl_param("helponformattinglink",
        $form->tmpl_param("can_commit", $config{rcs});
        $form->tmpl_param("indexlink", indexlink());
        $form->tmpl_param("helponformattinglink",

-               htmllink("", "", "ikiwiki/formatting",
+               htmllink($page, $page, "ikiwiki/formatting",

                        noimageinline => 1,
                        linktext => "FormattingHelp"));
                        noimageinline => 1,
                        linktext => "FormattingHelp"));

-       $form->tmpl_param("baseurl", baseurl());

        
        if ($form->submitted eq "Cancel") {
                if ($form->field("do") eq "create" && defined $from) {
        
        if ($form->submitted eq "Cancel") {
                if ($form->field("do") eq "create" && defined $from) {


@@ -343,7 +379,14 @@ sub cgi_editpage ($$) { #{{{
                return;
        }
        elsif ($form->submitted eq "Preview") {
                return;
        }
        elsif ($form->submitted eq "Preview") {

+               my $new=not exists $pagesources{$page};
+               if ($new) {
+                       # temporarily record its type
+                       $pagesources{$page}=$page.".".$type;
+               }
+

                my $content=$form->field('editcontent');
                my $content=$form->field('editcontent');

+

                run_hooks(editcontent => sub {
                        $content=shift->(
                                content => $content,
                run_hooks(editcontent => sub {
                        $content=shift->(
                                content => $content,


@@ -352,11 +395,21 @@ sub cgi_editpage ($$) { #{{{
                                session => $session,
                        );
                });
                                session => $session,
                        );
                });

-               $form->tmpl_param("page_preview",
-                       htmlize($page, $type,
-                       linkify($page, "/",
-                       preprocess($page, "/",
-                       filter($page, "/", $content), 0, 1))));
+               my $preview=htmlize($page, $page, $type,
+                       linkify($page, $page,
+                       preprocess($page, $page,
+                       filter($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();
        }
                # previewing may have created files on disk
                saveindex();
        }


@@ -372,7 +425,8 @@ sub cgi_editpage ($$) { #{{{
                        if (! defined $from || ! length $from ||
                            $from ne $form->field('from') ||
                            file_pruned($from, $config{srcdir}) ||
                        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;
                        }
                            $form->submitted eq "Preview") {
                                @page_locs=$best_loc=$page;
                        }


@@ -433,8 +487,8 @@ sub cgi_editpage ($$) { #{{{
                        
                        $form->tmpl_param("page_select", 1);
                        $form->field(name => "page", type => 'select',
                        
                        $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)));
                        $form->field(name => "type", type => 'select',
                                options => \@page_types);
                        $form->title(sprintf(gettext("creating %s"), pagetitle($page)));


@@ -458,23 +512,33 @@ sub cgi_editpage ($$) { #{{{
                        $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
                }
                
                        $form->title(sprintf(gettext("editing %s"), pagetitle($page)));
                }
                

-               showform($form, \@buttons, $session, $q);
+               showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);

        }
        else {
                # save page
                check_canedit($page, $q, $session);
        }
        else {
                # save page
                check_canedit($page, $q, $session);

+       
+               # 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 &&
 
                my $exists=-e "$config{srcdir}/$file";
 
                if ($form->field("do") ne "create" && ! $exists &&

-                   ! eval { srcfile($file) }) {
+                   ! defined srcfile($file, 1)) {

                        $form->tmpl_param("page_gone", 1);
                        $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));
                        $form->tmpl_param("page_gone", 1);
                        $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));

-                       showform($form, \@buttons, $session, $q);
+                       showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);

                        return;
                }
                elsif ($form->field("do") eq "create" && $exists) {
                        return;
                }
                elsif ($form->field("do") eq "create" && $exists) {


@@ -488,7 +552,7 @@ sub cgi_editpage ($$) { #{{{
                                value => readfile("$config{srcdir}/$file").
                                         "\n\n\n".$form->field("editcontent"),
                                force => 1);
                                value => readfile("$config{srcdir}/$file").
                                         "\n\n\n".$form->field("editcontent"),
                                force => 1);

-                       showform($form, \@buttons, $session, $q);
+                       showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);

                        return;
                }
                
                        return;
                }
                


@@ -518,7 +582,8 @@ sub cgi_editpage ($$) { #{{{
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));

-                       showform($form, \@buttons, $session, $q);
+                       showform($form, \@buttons, $session, $q,
+                               forcebaseurl => $baseurl);

                        return;
                }
                
                        return;
                }
                


@@ -562,7 +627,8 @@ sub cgi_editpage ($$) { #{{{
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));
                        $form->field(name => "page", type => 'hidden');
                        $form->field(name => "type", type => 'hidden');
                        $form->title(sprintf(gettext("editing %s"), $page));

-                       showform($form, \@buttons, $session, $q);
+                       showform($form, \@buttons, $session, $q,
+                               forcebaseurl => $baseurl);

                        return;
                }
                else {
                        return;
                }
                else {


@@ -577,11 +643,18 @@ sub cgi_getsession ($) { #{{{
        my $q=shift;
 
        eval q{use CGI::Session};
        my $q=shift;
 
        eval q{use CGI::Session};

+       error($@) if $@;

        CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
        
        my $oldmask=umask(077);
        CGI::Session->name("ikiwiki_session_".encode_utf8($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 $session;
        umask($oldmask);
 
        return $session;


@@ -600,11 +673,14 @@ sub cgi (;$$) { #{{{
        my $q=shift;
        my $session=shift;
 
        my $q=shift;
        my $session=shift;
 

+       eval q{use CGI};
+       error($@) if $@;
+       $CGI::DISABLE_UPLOADS=$config{cgi_disable_uploads};
+

        if (! $q) {
        if (! $q) {

-               eval q{use CGI};
-               error($@) if $@;
-       
+               binmode(STDIN);

                $q=CGI->new;
                $q=CGI->new;

+               binmode(STDIN, ":utf8");

        
                run_hooks(cgi => sub { shift->($q) });
        }
        
                run_hooks(cgi => sub { shift->($q) });
        }


@@ -674,4 +750,14 @@ sub cgi (;$$) { #{{{
        }
 } #}}}
 
        }
 } #}}}
 

+# Does not need tobe called directly; all errors will go through here.
+sub cgierror ($) { #{{{
+       my $message=shift;
+
+       print "Content-type: text/html\n\n";
+       print misctemplate(gettext("Error"),
+               "<p class=\"error\">".gettext("Error").": $message</p>");
+       die $@;
+} #}}}
+

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