+#!/usr/bin/perl
+package IkiWiki::Plugin::goto;
+
+use warnings;
+use strict;
+use IkiWiki 3.00;
+
+sub import {
+ hook(type => "cgi", id => 'goto', call => \&cgi);
+}
+
+sub getsetup () {
+ return
+ plugin => {
+ safe => 1,
+ rebuild => 0,
+ }
+}
+
+# cgi_goto(CGI, [page])
+# Redirect to a specified page, or display "not found". If not specified,
+# the page param from the CGI object is used.
+sub cgi_goto ($;$) {
+ my $q = shift;
+ my $page = shift;
+
+ if (!defined $page) {
+ $page = IkiWiki::decode_utf8($q->param("page"));
+
+ if (!defined $page) {
+ error("missing page parameter");
+ }
+ }
+
+ IkiWiki::loadindex();
+
+ # If the page is internal (like a comment), see if it has a
+ # permalink. Comments do.
+ if (IkiWiki::isinternal($page) &&
+ defined $pagestate{$page}{meta}{permalink}) {
+ redirect($q, $pagestate{$page}{meta}{permalink});
+ }
+
+ my $link = bestlink("", $page);
+
+ if (! length $link) {
+ print $q->header(-status => "404 Not Found");
+ print IkiWiki::misctemplate(gettext("missing page"),
+ "<p>".
+ sprintf(gettext("The page %s does not exist."),
+ htmllink("", "", $page)).
+ "</p>".
+ # Internet Explorer won't show custom 404 responses
+ # unless they're >= 512 bytes
+ (" " x 512));
+ }
+ else {
+ IkiWiki::redirect($q, urlto($link, undef, 1));
+ }
+
+ exit;
+}
+
+sub cgi ($) {
+ my $cgi=shift;
+ my $do = $cgi->param('do');
+
+ if (defined $do && ($do eq 'goto' || $do eq 'commenter' ||
+ $do eq 'recentchanged_link')) {
+ # goto is the preferred name for this; recentchanges_link and
+ # commenter are for compatibility with any saved URLs
+ cgi_goto($cgi);
+ }
+}
+
+1;