X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/6eb3cf7e76c53b05154bb2104e395922bd0eed4e..b0b87d15843db10b6ff7a4e30ff8bf110e229075:/IkiWiki/Plugin/external.pm

diff --git a/IkiWiki/Plugin/external.pm b/IkiWiki/Plugin/external.pm
index 43d2cbb28..ba6c7d8b9 100644
--- a/IkiWiki/Plugin/external.pm
+++ b/IkiWiki/Plugin/external.pm
@@ -1,6 +1,6 @@
 #!/usr/bin/perl
 # Support for external plugins written in other languages.
-# Communication via XML RPC a pipe.
+# Communication via XML RPC to a pipe.
 # See externaldemo for an example of a plugin that uses this.
 package IkiWiki::Plugin::external;
 
@@ -68,7 +68,22 @@ sub rpc_call ($$;@) { #{{{
 					return @{$value->value};
 				}
 				elsif ($value->isa('RPC::XML::struct')) {
-					return %{$value->value};
+					my %hash=%{$value->value};
+
+					# XML-RPC v1 does not allow for
+					# nil/null/None/undef values to be
+					# transmitted, so until
+					# XML::RPC::Parser honours v2
+					# (<nil/>), external plugins send
+					# a hash with one key "null" pointing
+					# to an empty string.
+					if (exists $hash{null} &&
+					    $hash{null} eq "" &&
+					    int(keys(%hash)) == 1) {
+						return undef;
+					}
+
+					return %hash;
 				}
 				else {
 					return $value->value;
@@ -92,6 +107,14 @@ sub rpc_call ($$;@) { #{{{
 				error("XML RPC call error, unknown function: $name");
 			}
 
+			# XML-RPC v1 does not allow for nil/null/None/undef
+			# values to be transmitted, so until XML::RPC::Parser
+			# honours v2 (<nil/>), send a hash with one key "null"
+			# pointing to an empty string.
+			if (! defined $ret) {
+				$ret={"null" => ""};
+			}
+
 			my $string=eval { RPC::XML::response->new($ret)->as_string };
 			if ($@ && ref $ret) {
 				# One common reason for serialisation to
@@ -150,8 +173,9 @@ sub setstate ($$$$;@) { #{{{
 	my $page=shift;
 	my $id=shift;
 	my $key=shift;
+	my $value=shift;
 
-	return $IkiWiki::pagestate{$page}{$id}{$key}=@_;
+	return $IkiWiki::pagestate{$page}{$id}{$key}=$value;
 } #}}}
 
 sub getargv ($) { #{{{
@@ -193,8 +217,7 @@ sub hook ($@) { #{{{
 	delete $params{call};
 
 	IkiWiki::hook(%params, call => sub {
-		my $ret=IkiWiki::Plugin::external::rpc_call($plugin, $callback, @_);
-		return $ret;
+		IkiWiki::Plugin::external::rpc_call($plugin, $callback, @_);
 	});
 } #}}}