smcvpostcomment: always allow wikilinks, and do access control

wikilinks are harmless, so we might as well allow them.

Access control for this plugin is a bit odd, since we specifically
don't want to allow comments to be edited - so the check is whether the
user is allowed to edit a deliberately invalid page name,
page/commented/on[smcvpostcomment]. You can put smcvpostcomment(*)
or smcvpostcomment(some/subdir/*) in $config{anonok_pagespec}
or the opposite in $config{locked_pages} to allow "editing" (really
just posting) comments.

diff --git a/IkiWiki/Plugin/smcvpostcomment.pm b/IkiWiki/Plugin/smcvpostcomment.pm
index 59f0e8cfc9f5cf09b72bb75ab05c2c6960b975d3..43b1d3e6fbe8e927ac6bb0f642af59e094bdd5cb 100644 (file)
--- a/IkiWiki/Plugin/smcvpostcomment.pm
+++ b/IkiWiki/Plugin/smcvpostcomment.pm
@@ -113,7 +113,6 @@ sub sessioncgi ($$) { #{{{
        return unless $do eq PLUGIN;
 
        # These are theoretically configurable, but currently hard-coded
-       my $allow_wikilinks = 0;
        my $allow_directives = 0;
        my $commit_comments = 1;
 
@@ -187,15 +186,24 @@ sub sessioncgi ($$) { #{{{
                exit;
        }
 
+       IkiWiki::check_canedit($page . "[" . PLUGIN . "]", $cgi, $session);
+
        my ($authorurl, $author) = linkuser(getcgiuser($session));
 
        my $body = $form->field('body') || '';
        $body =~ s/\r\n/\n/g;
        $body =~ s/\r/\n/g;
-       $body .= "\n" if $body !~ /\n$/;
+       $body = "\n" if $body !~ /\n$/;
+
+       unless ($allow_directives) {
+               # don't allow new-style directives at all
+               $body =~ s/(^|[^\\])\[\[!/$1\\[[!/g;
 
-       $body =~ s/\[\[([^!])/[[$1/g unless $allow_wikilinks;
-       $body =~ s/\[\[!/[[!/g unless $allow_directives;
+               # don't allow [[ unless it begins an old-style
+               # wikilink, if prefix_directives is off
+               $body =~ s/(^|[^\\])\[\[(?![^\n\s\]+]\]\])/$1\\[[!/g
+                       unless $config{prefix_directives};
+       }
 
        # In this template, the [[!meta]] directives should stay at the end,
        # so that they will override anything the user specifies. (For
@@ -301,4 +309,16 @@ sub sessioncgi ($$) { #{{{
        exit;
 } #}}}
 
+package IkiWiki::PageSpec;
+
+sub match_smcvpostcomment ($$;@) {
+       my $page = shift;
+       my $glob = shift;
+
+       unless ($page =~ s/\[smcvpostcomment\]$//) {
+               return IkiWiki::FailReason->new("not posting a comment");
+       }
+       return match_glob($page, $glob);
+}
+
 1