X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/d7fdd04b5a113b6dded40cb79b670b16570c11b3..9fca7f2f8b64f4caded4a0099cef1f4d152dabee:/IkiWiki/CGI.pm

diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index 55ee5d86a..65136a269 100644
--- a/IkiWiki/CGI.pm
+++ b/IkiWiki/CGI.pm
@@ -21,7 +21,7 @@ sub printheader ($) { #{{{
 
 } #}}}
 
-sub showform ($$$$) { #{{{
+sub showform ($$$$;@) { #{{{
 	my $form=shift;
 	my $buttons=shift;
 	my $session=shift;
@@ -35,7 +35,7 @@ sub showform ($$$$) { #{{{
 	}
 
 	printheader($session);
-	print misctemplate($form->title, $form->render(submit => $buttons));
+	print misctemplate($form->title, $form->render(submit => $buttons), @_);
 }
 
 sub redirect ($$) { #{{{
@@ -84,53 +84,6 @@ sub decode_cgi_utf8 ($) { #{{{
 	}
 } #}}}
 
-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(time - $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;
-} #}}}
-
 # Check if the user is signed in. If not, redirect to the signin form and
 # save their place to return to later.
 sub needsignin ($$) { #{{{
@@ -208,8 +161,18 @@ sub cgi_prefs ($$) { #{{{
 	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 $@;
 	my $form = CGI::FormBuilder->new(
@@ -240,7 +203,10 @@ sub cgi_prefs ($$) { #{{{
 		        buttons => $buttons);
 	});
 	
-	$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");
@@ -288,11 +254,11 @@ sub cgi_prefs ($$) { #{{{
 sub cgi_editpage ($$) { #{{{
 	my $q=shift;
 	my $session=shift;
-
-	my @fields=qw(do rcsinfo subpage from page type editcontent comments);
-	my @buttons=("Save Page", "Preview", "Cancel");
 	
 	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(
@@ -323,6 +289,8 @@ sub cgi_editpage ($$) { #{{{
 	    file_pruned($page, $config{srcdir}) || $page=~/^\//) {
 		error("bad page name");
 	}
+
+	my $baseurl=$config{url}."/".htmlpage($page);
 	
 	my $from;
 	if (defined $form->field('from')) {
@@ -361,6 +329,8 @@ sub cgi_editpage ($$) { #{{{
 	}
 
 	$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');
@@ -372,10 +342,9 @@ sub cgi_editpage ($$) { #{{{
 	$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"));
-	$form->tmpl_param("baseurl", baseurl());
 	
 	if ($form->submitted eq "Cancel") {
 		if ($form->field("do") eq "create" && defined $from) {
@@ -390,6 +359,12 @@ sub cgi_editpage ($$) { #{{{
 		return;
 	}
 	elsif ($form->submitted eq "Preview") {
+		my $new=not exists $pagesources{$page};
+		if ($new) {
+			# temporarily record its type
+			$pagesources{$page}=$page.".".$type;
+		}
+
 		my $content=$form->field('editcontent');
 		run_hooks(editcontent => sub {
 			$content=shift->(
@@ -401,9 +376,15 @@ sub cgi_editpage ($$) { #{{{
 		});
 		$form->tmpl_param("page_preview",
 			htmlize($page, $type,
-			linkify($page, "",
+			linkify($page, $page,
 			preprocess($page, $page,
 			filter($page, $page, $content), 0, 1))));
+		
+		if ($new) {
+			delete $pagesources{$page};
+		}
+		# previewing may have created files on disk
+		saveindex();
 	}
 	elsif ($form->submitted eq "Save Page") {
 		$form->tmpl_param("page_preview", "");
@@ -439,9 +420,10 @@ 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 $_}
@@ -449,8 +431,16 @@ 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 {
@@ -494,12 +484,21 @@ sub cgi_editpage ($$) { #{{{
 			$form->title(sprintf(gettext("editing %s"), pagetitle($page)));
 		}
 		
-		showform($form, \@buttons, $session, $q);
-		saveindex();
+		showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
 	}
 	else {
 		# save page
 		check_canedit($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";
 
@@ -511,7 +510,7 @@ sub cgi_editpage ($$) { #{{{
 			$form->field(name => "page", type => 'hidden');
 			$form->field(name => "type", type => 'hidden');
 			$form->title(sprintf(gettext("editing %s"), $page));
-			showform($form, \@buttons, $session, $q);
+			showform($form, \@buttons, $session, $q, forcebaseurl => $baseurl);
 			return;
 		}
 		elsif ($form->field("do") eq "create" && $exists) {
@@ -525,7 +524,7 @@ sub cgi_editpage ($$) { #{{{
 				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;
 		}
 		
@@ -555,7 +554,8 @@ sub cgi_editpage ($$) { #{{{
 			$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;
 		}
 		
@@ -573,7 +573,7 @@ sub cgi_editpage ($$) { #{{{
 
 			# 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"),
@@ -586,10 +586,6 @@ sub cgi_editpage ($$) { #{{{
 		# may have been committed while the post-commit hook was
 		# disabled.
 		require IkiWiki::Render;
-		# Reload index, since the first time it's loaded is before
-		# the wiki is locked, and things may have changed in the
-		# meantime.
-		loadindex();
 		refresh();
 		saveindex();
 
@@ -603,7 +599,8 @@ sub cgi_editpage ($$) { #{{{
 			$form->field(name => "page", type => 'hidden');
 			$form->field(name => "type", type => 'hidden');
 			$form->title(sprintf(gettext("editing %s"), $page));
-			showform($form, \@buttons, $session, $q);
+			showform($form, \@buttons, $session, $q,
+				forcebaseurl => $baseurl);
 			return;
 		}
 		else {
@@ -661,14 +658,9 @@ sub cgi (;$$) { #{{{
 		}
 	}
 	
-	# 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);