Rebuild for jessie-backports

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

diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index 53e151dc2696eb193dbabf9c61bb9986dcaa6f6a..243662386a55f84fc21c6959e136b4de3eaec27c 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;


@@ -7,11 +9,99 @@ use IkiWiki::UserInfo;
 use open qw{:utf8 :std};
 use Encode;
 
 use open qw{:utf8 :std};
 use Encode;
 

-package IkiWiki;
+sub printheader ($) {
+       my $session=shift;
+       
+       if (($ENV{HTTPS} && lc $ENV{HTTPS} ne "off") || $config{sslcookie}) {
+               print $session->header(-charset => 'utf-8',
+                       -cookie => $session->cookie(-httponly => 1, -secure => 1));
+       }
+       else {
+               print $session->header(-charset => 'utf-8',
+                       -cookie => $session->cookie(-httponly => 1));
+       }
+}
+
+sub prepform {
+       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);
+               });
+       }
+
+       return $form;
+}
+
+sub showform ($$$$;@) {
+       my $form=prepform(@_);
+       shift;
+       my $buttons=shift;
+       my $session=shift;
+       my $cgi=shift;
+
+       printheader($session);
+       print cgitemplate($cgi, $form->title,
+               $form->render(submit => $buttons), @_);
+}
+
+sub cgitemplate ($$$;@) {
+       my $cgi=shift;
+       my $title=shift;
+       my $content=shift;
+       my %params=@_;
+       
+       my $template=template("page.tmpl");
+
+       my $topurl = $config{url};
+       if (defined $cgi && ! $config{w3mmode} && ! $config{reverse_proxy}) {
+               $topurl = $cgi->url;
+       }
+
+       my $page="";
+       if (exists $params{page}) {
+               $page=delete $params{page};
+               $params{forcebaseurl}=urlto($page);
+       }
+       run_hooks(pagetemplate => sub {
+               shift->(
+                       page => $page,
+                       destpage => $page,
+                       template => $template,
+               );
+       });
+       templateactions($template, "");

 
 

-sub redirect ($$) { #{{{
+       my $baseurl = baseurl();
+
+       $template->param(
+               dynamic => 1,
+               title => $title,
+               wikiname => $config{wikiname},
+               content => $content,
+               baseurl => $baseurl,
+               html5 => $config{html5},
+               %params,
+       );
+       
+       return $template->output;
+}
+
+sub redirect ($$) {

        my $q=shift;
        my $q=shift;

-       my $url=shift;
+       eval q{use URI};
+
+       my $topurl;
+       if (defined $q && ! $config{w3mmode} && ! $config{reverse_proxy}) {
+               $topurl = $q->url;
+       }
+
+       my $url=URI->new(urlabs(shift, $topurl));

        if (! $config{w3mmode}) {
                print $q->redirect($url);
        }
        if (! $config{w3mmode}) {
                print $q->redirect($url);
        }


@@ -19,519 +109,325 @@ sub redirect ($$) { #{{{
                print "Content-type: text/plain\n";
                print "W3m-control: GOTO $url\n\n";
        }
                print "Content-type: text/plain\n";
                print "W3m-control: GOTO $url\n\n";
        }

-} #}}}
+}

 
 

-sub page_locked ($$;$) { #{{{
-       my $page=shift;
-       my $session=shift;
-       my $nonfatal=shift;
-       
-       my $user=$session->param("name");
-       return if defined $user && is_admin($user);
-
-       foreach my $admin (@{$config{adminuser}}) {
-               my $locked_pages=userinfo_get($admin, "locked_pages");
-               if (globlist_match($page, userinfo_get($admin, "locked_pages"))) {
-                       return 1 if $nonfatal;
-                       error(htmllink("", "", $page, 1)." is locked by ".
-                             htmllink("", "", $admin, 1)." and cannot be edited.");
+sub decode_cgi_utf8 ($) {
+       # decode_form_utf8 method is needed for 5.01
+       if ($] < 5.01) {
+               my $cgi = shift;
+               foreach my $f ($cgi->param) {
+                       $cgi->param($f, map { decode_utf8 $_ }
+                               @{$cgi->param_fetch($f)});

                }
        }
                }
        }

+}

 
 

-       return 0;
-} #}}}
+sub safe_decode_utf8 ($) {
+    my $octets = shift;
+    if (!Encode::is_utf8($octets)) {
+        return decode_utf8($octets);
+    }
+    else {
+        return $octets;
+    }
+}

 
 

-sub cgi_recentchanges ($) { #{{{
-       my $q=shift;
-       
-       unlockwiki();
+sub decode_form_utf8 ($) {
+       if ($] >= 5.01) {
+               my $form = shift;
+               foreach my $f ($form->field) {
+                       my @value=map { safe_decode_utf8($_) } $form->field($f);
+                       $form->field(name  => $f,
+                                    value => \@value,
+                                    force => 1,
+                       );
+               }
+       }
+}

 
 

-       # 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};
-       memoize("htmllink");
+# Check if the user is signed in. If not, redirect to the signin form and
+# save their place to return to later.
+sub needsignin ($$) {
+       my $q=shift;
+       my $session=shift;

 
 

-       my $template=template("recentchanges.tmpl"); 
-       $template->param(
-               title => "RecentChanges",
-               indexlink => indexlink(),
-               wikiname => $config{wikiname},
-               changelog => [rcs_recentchanges(100)],
-               styleurl => styleurl(),
-               baseurl => "$config{url}/",
-       );
-       print $q->header(-charset=>'utf-8'), $template->output;
-} #}}}
+       if (! defined $session->param("name") ||
+           ! userinfo_get($session->param("name"), "regdate")) {
+               $session->param(postsignin => $q->query_string);
+               cgi_signin($q, $session);
+               cgi_savesession($session);
+               exit;
+       }
+}

 
 

-sub cgi_signin ($$) { #{{{
+sub cgi_signin ($$;$) {

        my $q=shift;
        my $session=shift;
        my $q=shift;
        my $session=shift;

+       my $returnhtml=shift;

 
 

+       decode_cgi_utf8($q);

        eval q{use CGI::FormBuilder};
        eval q{use CGI::FormBuilder};

+       error($@) if $@;

        my $form = CGI::FormBuilder->new(
                title => "signin",
        my $form = CGI::FormBuilder->new(
                title => "signin",

-               fields => [qw(do title page subpage from name password confirm_password email)],
-               header => 1,
+               name => "signin",

                charset => "utf-8",
                method => 'POST',
                charset => "utf-8",
                method => 'POST',

-               validate => {
-                       confirm_password => {
-                               perl => q{eq $form->field("password")},
-                       },
-                       email => 'EMAIL',
-               },

                required => 'NONE',
                javascript => 0,
                params => $q,
                required => 'NONE',
                javascript => 0,
                params => $q,

-               action => $config{cgiurl},
+               action => cgiurl(),

                header => 0,
                header => 0,

-               template => (-e "$config{templatedir}/signin.tmpl" ?
-                            {template_params("signin.tmpl")} : ""),
-               stylesheet => styleurl(),
+               template => {type => 'div'},
+               stylesheet => 1,

        );
        );

+       my $buttons=["Login"];

        
        

-       $form->field(name => "name", required => 0);
-       $form->field(name => "do", type => "hidden");
-       $form->field(name => "page", type => "hidden");
-       $form->field(name => "title", type => "hidden");
-       $form->field(name => "from", type => "hidden");
-       $form->field(name => "subpage", type => "hidden");
-       $form->field(name => "password", type => "password", required => 0);
-       $form->field(name => "confirm_password", type => "password", required => 0);
-       $form->field(name => "email", required => 0);
-       if ($q->param("do") ne "signin") {
-               $form->text("You need to log in first.");
-       }
+       $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 => $buttons);
+       });
+       decode_form_utf8($form);
+

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

-               # Set required fields based on how form was submitted.
-               my %required=(
-                       "Login" => [qw(name password)],
-                       "Register" => [qw(name password confirm_password email)],
-                       "Mail Password" => [qw(name)],
-               );
-               foreach my $opt (@{$required{$form->submitted}}) {
-                       $form->field(name => $opt, required => 1);
-               }
-       
-               # Validate password differently depending on how
-               # form was submitted.
-               if ($form->submitted eq 'Login') {
-                       $form->field(
-                               name => "password",
-                               validate => sub {
-                                       length $form->field("name") &&
-                                       shift eq userinfo_get($form->field("name"), 'password');
-                               },
-                       );
-                       $form->field(name => "name", validate => '/^\w+$/');
-               }
-               else {
-                       $form->field(name => "password", validate => 'VALUE');
-               }
-               # And make sure the entered name exists when logging
-               # in or sending email, and does not when registering.
-               if ($form->submitted eq 'Register') {
-                       $form->field(
-                               name => "name",
-                               validate => sub {
-                                       my $name=shift;
-                                       length $name &&
-                                       $name=~/$config{wiki_file_regexp}/ &&
-                                       ! userinfo_get($name, "regdate");
-                               },
-                       );
-               }
-               else {
-                       $form->field(
-                               name => "name",
-                               validate => sub {
-                                       my $name=shift;
-                                       length $name &&
-                                       userinfo_get($name, "regdate");
-                               },
-                       );
-               }
+               $form->validate;

        }
        }

-       else {
-               # First time settings.
-               $form->field(name => "name", comment => "use FirstnameLastName");
-               $form->field(name => "confirm_password", comment => "(only needed");
-               $form->field(name => "email",            comment => "for registration)");
-               if ($session->param("name")) {
-                       $form->field(name => "name", value => $session->param("name"));
-               }
+
+       if ($returnhtml) {
+               $form=prepform($form, $buttons, $session, $q);
+               return $form->render(submit => $buttons);

        }
 
        }
 

-       if ($form->submitted && $form->validate) {
-               if ($form->submitted eq 'Login') {
-                       $session->param("name", $form->field("name"));
-                       if (defined $form->field("do") && 
-                           $form->field("do") ne 'signin') {
-                               redirect($q, cgiurl(
-                                       do => $form->field("do"),
-                                       page => $form->field("page"),
-                                       title => $form->field("title"),
-                                       subpage => $form->field("subpage"),
-                                       from => $form->field("from"),
-                               ));
-                       }
-                       else {
-                               redirect($q, $config{url});
-                       }
-               }
-               elsif ($form->submitted eq 'Register') {
-                       my $user_name=$form->field('name');
-                       if (userinfo_setall($user_name, {
-                                          'email' => $form->field('email'),
-                                          'password' => $form->field('password'),
-                                          'regdate' => time
-                                        })) {
-                               $form->field(name => "confirm_password", type => "hidden");
-                               $form->field(name => "email", type => "hidden");
-                               $form->text("Registration successful. Now you can Login.");
-                               print $session->header(-charset=>'utf-8');
-                               print misctemplate($form->title, $form->render(submit => ["Login"]));
-                       }
-                       else {
-                               error("Error saving registration.");
-                       }
-               }
-               elsif ($form->submitted eq 'Mail Password') {
-                       my $user_name=$form->field("name");
-                       my $template=template("passwordmail.tmpl");
-                       $template->param(
-                               user_name => $user_name,
-                               user_password => userinfo_get($user_name, "password"),
-                               wikiurl => $config{url},
-                               wikiname => $config{wikiname},
-                               REMOTE_ADDR => $ENV{REMOTE_ADDR},
-                       );
-                       
-                       eval q{use Mail::Sendmail};
-                       sendmail(
-                               To => userinfo_get($user_name, "email"),
-                               From => "$config{wikiname} admin <$config{adminemail}>",
-                               Subject => "$config{wikiname} information",
-                               Message => $template->output,
-                       ) or error("Failed to send mail");
-                       
-                       $form->text("Your password has been emailed to you.");
-                       $form->field(name => "name", required => 0);
-                       print $session->header(-charset=>'utf-8');
-                       print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
-               }
+       showform($form, $buttons, $session, $q);
+}
+
+sub cgi_postsignin ($$) {
+       my $q=shift;
+       my $session=shift;
+       
+       # Continue with whatever was being done before the signin process.
+       if (defined $session->param("postsignin")) {
+               my $postsignin=CGI->new($session->param("postsignin"));
+               $session->clear("postsignin");
+               cgi($postsignin, $session);
+               cgi_savesession($session);
+               exit;

        }
        else {
        }
        else {

-               print $session->header(-charset=>'utf-8');
-               print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
+               if ($config{sslcookie} && ! $q->https()) {
+                       error(gettext("probable misconfiguration: sslcookie is set, but you are attempting to login via http, not https"));
+               }
+               else {
+                       error(gettext("login failed, perhaps you need to turn on cookies?"));
+               }

        }
        }

-} #}}}
+}

 
 

-sub cgi_prefs ($$) { #{{{
+sub cgi_prefs ($$) {

        my $q=shift;
        my $session=shift;
 
        my $q=shift;
        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};
        eval q{use CGI::FormBuilder};

+       error($@) if $@;

        my $form = CGI::FormBuilder->new(
                title => "preferences",
        my $form = CGI::FormBuilder->new(
                title => "preferences",

-               fields => [qw(do name password confirm_password email 
-                             subscriptions locked_pages)],
+               name => "preferences",

                header => 0,
                charset => "utf-8",
                method => 'POST',
                validate => {
                header => 0,
                charset => "utf-8",
                method => 'POST',
                validate => {

-                       confirm_password => {
-                               perl => q{eq $form->field("password")},
-                       },

                        email => 'EMAIL',
                },
                required => 'NONE',
                javascript => 0,
                params => $q,
                        email => 'EMAIL',
                },
                required => 'NONE',
                javascript => 0,
                params => $q,

-               action => $config{cgiurl},
-               template => (-e "$config{templatedir}/prefs.tmpl" ?
-                            {template_params("prefs.tmpl")} : ""),
-               stylesheet => styleurl(),
+               action => cgiurl(),
+               template => {type => 'div'},
+               stylesheet => 1,
+               fieldsets => [
+                       [login => gettext("Login")],
+                       [preferences => gettext("Preferences")],
+                       [admin => gettext("Admin")]
+               ],

        );
        );

-       my @buttons=("Save Preferences", "Logout", "Cancel");
+       my $buttons=["Save Preferences", "Logout", "Cancel"];

        
        

-       my $user_name=$session->param("name");
-       $form->field(name => "do", type => "hidden");
-       $form->field(name => "name", disabled => 1,
-               value => $user_name, force => 1);
-       $form->field(name => "password", type => "password");
-       $form->field(name => "confirm_password", type => "password");
-       $form->field(name => "subscriptions", size => 50,
-               comment => "(".htmllink("", "", "GlobList", 1).")");
-       $form->field(name => "locked_pages", size => 50,
-               comment => "(".htmllink("", "", "GlobList", 1).")");
+       decode_form_utf8($form);
+       run_hooks(formbuilder_setup => sub {
+               shift->(form => $form, cgi => $q, session => $session,
+                       buttons => $buttons);
+       });
+       decode_form_utf8($form);

        
        

-       if (! is_admin($user_name)) {
-               $form->field(name => "locked_pages", 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");

        
        

+       my $user_name=$session->param("name");
+

        if (! $form->submitted) {
                $form->field(name => "email", force => 1,
                        value => userinfo_get($user_name, "email"));
        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"));
-               $form->field(name => "locked_pages", force => 1,
-                       value => userinfo_get($user_name, "locked_pages"));

        }
        
        if ($form->submitted eq 'Logout') {
                $session->delete();
        }
        
        if ($form->submitted eq 'Logout') {
                $session->delete();

-               redirect($q, $config{url});
+               redirect($q, baseurl(undef));

                return;
        }
        elsif ($form->submitted eq 'Cancel') {
                return;
        }
        elsif ($form->submitted eq 'Cancel') {

-               redirect($q, $config{url});
+               redirect($q, baseurl(undef));

                return;
        }
                return;
        }

-       elsif ($form->submitted eq "Save Preferences" && $form->validate) {
-               foreach my $field (qw(password email subscriptions locked_pages)) {
-                       if (length $form->field($field)) {
-                               userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
-                       }
+       elsif ($form->submitted eq 'Save Preferences' && $form->validate) {
+               if (defined $form->field('email')) {
+                       userinfo_set($user_name, 'email', $form->field('email')) ||
+                               error("failed to set email");

                }
                }

-               $form->text("Preferences saved.");
+
+               $form->text(gettext("Preferences saved."));

        }
        
        }
        

-       print $session->header(-charset=>'utf-8');
-       print misctemplate($form->title, $form->render(submit => \@buttons));
-} #}}}
+       showform($form, $buttons, $session, $q,
+               prefsurl => "", # avoid showing the preferences link
+       );
+}

 
 

-sub cgi_editpage ($$) { #{{{
+sub cgi_custom_failure ($$$) {

        my $q=shift;
        my $q=shift;

-       my $session=shift;
+       my $httpstatus=shift;
+       my $message=shift;

 
 

-       eval q{use CGI::FormBuilder};
-       my $form = CGI::FormBuilder->new(
-               fields => [qw(do rcsinfo subpage from page editcontent comments)],
-               header => 1,
-               charset => "utf-8",
-               method => 'POST',
-               validate => {
-                       editcontent => '/.+/',
-               },
-               required => [qw{editcontent}],
-               javascript => 0,
-               params => $q,
-               action => $config{cgiurl},
-               table => 0,
-               template => {template_params("editpage.tmpl")},
+       print $q->header(
+               -status => $httpstatus,
+               -charset => 'utf-8',

        );
        );

-       my @buttons=("Save Page", "Preview", "Cancel");
-       
-       # This untaint is safe because titlepage removes any problimatic
-       # characters.
-       my ($page)=decode_utf8($form->param('page'));
-       $page=titlepage(possibly_foolish_untaint(lc($page)));
-       if (! defined $page || ! length $page ||
-           $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
-               error("bad page name");
-       }
-       $page=lc($page);
-       
-       my $file;
-       if (exists $pagesources{lc($page)}) {
-               $file=$pagesources{lc($page)};
-       }
-       else {
-               $file=$page.".".$config{default_pageext};
-       }
-       my $newfile=0;
-       if (! -e "$config{srcdir}/$file") {
-               $newfile=1;
-       }
-
-       $form->field(name => "do", type => 'hidden');
-       $form->field(name => "from", type => 'hidden');
-       $form->field(name => "rcsinfo", type => 'hidden');
-       $form->field(name => "subpage", type => 'hidden');
-       $form->field(name => "page", value => "$page", force => 1);
-       $form->field(name => "comments", type => "text", size => 80);
-       $form->field(name => "editcontent", type => "textarea", rows => 20,
-               cols => 80);
-       $form->tmpl_param("can_commit", $config{rcs});
-       $form->tmpl_param("indexlink", indexlink());
-       $form->tmpl_param("helponformattinglink",
-               htmllink("", "", "HelpOnFormatting", 1));
-       $form->tmpl_param("styleurl", styleurl());
-       $form->tmpl_param("baseurl", "$config{url}/");
-       if (! $form->submitted) {
-               $form->field(name => "rcsinfo", value => rcs_prepedit($file),
-                       force => 1);
+       print $message;
+
+       # Internet Explod^Hrer won't show custom 404 responses
+       # unless they're >= 512 bytes
+       print ' ' x 512;
+
+       exit;
+}
+
+sub check_banned ($$) {
+       my $q=shift;
+       my $session=shift;
+
+       my $banned=0;
+       my $name=$session->param("name");
+       my $cloak=cloak($name) if defined $name;
+       if (defined $name && 
+           grep { $name eq $_ || $cloak eq $_ } @{$config{banned_users}}) {
+               $banned=1;

        }
        }

-       
-       if ($form->submitted eq "Cancel") {
-               redirect($q, "$config{url}/".htmlpage($page));
-               return;
+
+       foreach my $b (@{$config{banned_users}}) {
+               if (pagespec_match("", $b,
+                       ip => $session->remote_addr(),
+                       name => defined $name ? $name : "")
+                  || pagespec_match("", $b,
+                       ip => cloak($session->remote_addr()),
+                       name => defined $cloak ? $cloak : "")) {
+                       $banned=1;
+                       last;
+               }

        }
        }

-       elsif ($form->submitted eq "Preview") {
-               require IkiWiki::Render;
-               # Apparently FormBuilder doesn't not treat input as
-               # utf-8, so decode from it.
-               my $content=decode_utf8($form->field('editcontent'));
-               my $comments=decode_utf8($form->field('comments'));
-               $form->field(name => "editcontent",
-                               value => $content, force => 1);
-               $form->field(name => "comments",
-                               value => $comments, force => 1);
-               $form->tmpl_param("page_preview",
-                       htmlize(pagetype($file),
-                               linkify($page, $page, $content)));
+
+       if ($banned) {
+               $session->delete();
+               cgi_savesession($session);
+               cgi_custom_failure(
+                       $q, "403 Forbidden",
+                       gettext("You are banned."));

        }
        }

-       else {
-               $form->tmpl_param("page_preview", "");
+}
+
+sub cgi_getsession ($) {
+       my $q=shift;
+
+       eval q{use CGI::Session; use HTML::Entities};
+       error($@) if $@;
+       CGI::Session->name("ikiwiki_session_".encode_entities($config{wikiname}));
+       
+       my $oldmask=umask(077);
+       my $session = eval {
+               CGI::Session->new("driver:DB_File", $q,
+                       { FileName => "$config{wikistatedir}/sessions.db" })
+       };
+       if (! $session || $@) {
+               my $error = $@;
+               error($error." ".CGI::Session->errstr());

        }
        }

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

        
        

-       if (! $form->submitted || $form->submitted eq "Preview" || 
-           ! $form->validate) {
-               if ($form->field("do") eq "create") {
-                       my @page_locs;
-                       my $best_loc;
-                       my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
-                       if (! defined $from || ! length $from ||
-                           $from ne $form->param('from') ||
-                           $from=~/$config{wiki_file_prune_regexp}/ ||
-                           $from=~/^\// ||
-                           $form->submitted eq "Preview") {
-                               @page_locs=$best_loc=$page;
-                       }
-                       else {
-                               my $dir=$from."/";
-                               $dir=~s![^/]+/+$!!;
-                               
-                               if ((defined $form->param('subpage') && length $form->param('subpage')) ||
-                                   $page eq 'discussion') {
-                                       $best_loc="$from/$page";
-                               }
-                               else {
-                                       $best_loc=$dir.$page;
-                               }
-                               
-                               push @page_locs, $dir.$page;
-                               push @page_locs, "$from/$page";
-                               while (length $dir) {
-                                       $dir=~s![^/]+/+$!!;
-                                       push @page_locs, $dir.$page;
-                               }
-                       }
+       umask($oldmask);

 
 

-                       @page_locs = grep {
-                               ! exists $pagesources{lc($_)} &&
-                               ! page_locked($_, $session, 1)
-                       } @page_locs;
-                       
-                       if (! @page_locs) {
-                               # hmm, someone else made the page in the
-                               # meantime?
-                               redirect($q, "$config{url}/".htmlpage($page));
-                               return;
-                       }
-                               
-                       $form->tmpl_param("page_select", 1);
-                       $form->field(name => "page", type => 'select',
-                               options => \@page_locs, value => $best_loc);
-                       $form->title("creating ".pagetitle($page));
-               }
-               elsif ($form->field("do") eq "edit") {
-                       page_locked($page, $session);
-                       if (! defined $form->field('editcontent') || 
-                           ! length $form->field('editcontent')) {
-                               my $content="";
-                               if (exists $pagesources{lc($page)}) {
-                                       $content=readfile(srcfile($pagesources{lc($page)}));
-                                       $content=~s/\n/\r\n/g;
-                               }
-                               $form->field(name => "editcontent", value => $content,
-                                       force => 1);
-                       }
-                       $form->tmpl_param("page_select", 0);
-                       $form->field(name => "page", type => 'hidden');
-                       $form->title("editing ".pagetitle($page));
-               }
-               
-               print $form->render(submit => \@buttons);
-       }
-       else {
-               # save page
-               page_locked($page, $session);
-               
-               # Decode utf-8 since FormBuilder does not
-               my $content=decode_utf8($form->field('editcontent'));
-
-               $content=~s/\r\n/\n/g;
-               $content=~s/\r/\n/g;
-               writefile($file, $config{srcdir}, $content);
-               
-               my $message="web commit ";
-               if (defined $session->param("name") && 
-                   length $session->param("name")) {
-                       $message.="by ".$session->param("name");
-               }
-               else {
-                       $message.="from $ENV{REMOTE_ADDR}";
-               }
-               if (defined $form->field('comments') &&
-                   length $form->field('comments')) {
-                       $message.=": ".decode_utf8($form->field('comments'));
-               }
-               
-               if ($config{rcs}) {
-                       if ($newfile) {
-                               rcs_add($file);
-                       }
-                       # prevent deadlock with post-commit hook
-                       unlockwiki();
-                       # presumably the commit will trigger an update
-                       # of the wiki
-                       my $conflict=rcs_commit($file, $message,
-                               $form->field("rcsinfo"));
-               
-                       if (defined $conflict) {
-                               $form->field(name => "rcsinfo", value => rcs_prepedit($file),
-                                       force => 1);
-                               $form->tmpl_param("page_conflict", 1);
-                               $form->field("editcontent", value => $conflict, force => 1);
-                               $form->field(name => "comments", value => decode_utf8($form->field('comments')), force => 1);
-                               $form->field("do", "edit)");
-                               $form->tmpl_param("page_select", 0);
-                               $form->field(name => "page", type => 'hidden');
-                               $form->title("editing $page");
-                               print $form->render(submit => \@buttons);
-                               return;
-                       }
-               }
-               else {
-                       require IkiWiki::Render;
-                       refresh();
-                       saveindex();
+       return $session;
+}
+
+# To guard against CSRF, the user's session id (sid)
+# can be stored on a form. This function will check
+# (for logged in users) that the sid on the form matches
+# the session id in the cookie.
+sub checksessionexpiry ($$) {
+       my $q=shift;
+       my $session = shift;
+
+       if (defined $session->param("name")) {
+               my $sid=$q->param('sid');
+               if (! defined $sid || $sid ne $session->id) {
+                       error(gettext("Your login session has expired."));

                }
                }

-               
-               # The trailing question mark tries to avoid broken
-               # caches and get the most recent version of the page.
-               redirect($q, "$config{url}/".htmlpage($page)."?updated");

        }
        }

-} #}}}
+}
+
+sub cgi_savesession ($) {
+       my $session=shift;
+
+       # Force session flush with safe umask.
+       my $oldmask=umask(077);
+       $session->flush;
+       umask($oldmask);
+}
+
+sub cgi (;$$) {
+       my $q=shift;
+       my $session=shift;

 
 

-sub cgi () { #{{{

        eval q{use CGI};
        eval q{use CGI};

-       eval q{use CGI::Session};
-       
-       my $q=CGI->new;
+       error($@) if $@;
+       no warnings "once";
+       $CGI::DISABLE_UPLOADS=$config{cgi_disable_uploads};
+       use warnings;
+
+       if (! $q) {
+               binmode(STDIN);
+               $q=CGI->new;
+               binmode(STDIN, ":utf8");

        
        

-       if (exists $hooks{cgi}) {
-               foreach my $id (keys %{$hooks{cgi}}) {
-                       $hooks{cgi}{$id}{call}->($q);
-               }
+               run_hooks(cgi => sub { shift->($q) });

        }
        }

-       
+

        my $do=$q->param('do');
        if (! defined $do || ! length $do) {
                my $error = $q->cgi_error;
        my $do=$q->param('do');
        if (! defined $do || ! length $do) {
                my $error = $q->cgi_error;


@@ -542,60 +438,63 @@ sub cgi () { #{{{
                        error("\"do\" parameter missing");
                }
        }
                        error("\"do\" parameter missing");
                }
        }

+
+       # Need to lock the wiki before getting a session.
+       lockwiki();
+       loadindex();

        
        

-       # Things that do not need a session.
-       if ($do eq 'recentchanges') {
-               cgi_recentchanges($q);
-               return;
+       if (! $session) {
+               $session=cgi_getsession($q);

        }
        }

-       elsif ($do eq 'hyperestraier') {
-               cgi_hyperestraier();
+       
+       # Auth hooks can sign a user in.
+       if ($do ne 'signin' && ! defined $session->param("name")) {
+               run_hooks(auth => sub {
+                       shift->($q, $session)
+               });
+               if (defined $session->param("name")) {
+                       # Make sure whatever user was authed is in the
+                       # userinfo db.
+                       if (! userinfo_get($session->param("name"), "regdate")) {
+                               userinfo_setall($session->param("name"), {
+                                       email => defined $session->param("email") ? $session->param("email") : "",
+                                       password => "",
+                                       regdate => time,
+                               }) || error("failed adding user");
+                       }
+               }

        }
        
        }
        

-       CGI::Session->name("ikiwiki_session_$config{wikiname}");
+       check_banned($q, $session);

        
        

-       my $oldmask=umask(077);
-       my $session = CGI::Session->new("driver:DB_File", $q,
-               { FileName => "$config{wikistatedir}/sessions.db" });
-       umask($oldmask);
-       
-       # Everything below this point needs the user to be signed in.
-       if ((! $config{anonok} &&
-            (! defined $session->param("name") ||
-            ! userinfo_get($session->param("name"), "regdate"))) || $do eq 'signin') {
+       run_hooks(sessioncgi => sub { shift->($q, $session) });
+
+       if ($do eq 'signin') {

                cgi_signin($q, $session);
                cgi_signin($q, $session);

-       
-               # Force session flush with safe umask.
-               my $oldmask=umask(077);
-               $session->flush;
-               umask($oldmask);
-               
-               return;
-       }
-       
-       if ($do eq 'create' || $do eq 'edit') {
-               cgi_editpage($q, $session);
+               cgi_savesession($session);

        }
        elsif ($do eq 'prefs') {
                cgi_prefs($q, $session);
        }
        }
        elsif ($do eq 'prefs') {
                cgi_prefs($q, $session);
        }

-       elsif ($do eq 'blog') {
-               my $page=titlepage(lc($q->param('title')));
-               # if the page already exists, munge it to be unique
-               my $from=$q->param('from');
-               my $add="";
-               while (exists $oldpagemtime{"$from/$page$add"}) {
-                       $add=1 unless length $add;
-                       $add++;
-               }
-               $q->param('page', $page.$add);
-               # now run same as create
-               $q->param('do', 'create');
-               cgi_editpage($q, $session);
+       elsif (defined $session->param("postsignin") || $do eq 'postsignin') {
+               cgi_postsignin($q, $session);

        }
        else {
                error("unknown do parameter");
        }
        }
        else {
                error("unknown do parameter");
        }

-} #}}}
+}
+
+# Does not need to be called directly; all errors will go through here.
+sub cgierror ($) {
+       my $message=shift;
+
+       eval q{use HTML::Entities};
+       $message = encode_entities($message);
+
+       print "Content-type: text/html\n\n";
+       print cgitemplate(undef, gettext("Error"),
+               "<p class=\"error\">".gettext("Error").": $message</p>");
+       die $@;
+}

 
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