catch XML parsing errors, and skip DTD loading that requires net

diff --git a/lib/Text/Tradition/Stemma.pm b/lib/Text/Tradition/Stemma.pm
index e87b9c8..2e474e8 100644 (file)
--- a/lib/Text/Tradition/Stemma.pm
+++ b/lib/Text/Tradition/Stemma.pm
@@ -424,14 +424,19 @@ sub as_svg {
     # $dotfile->unlink_on_destroy(0);
     binmode $dotfile, ':utf8';
     print $dotfile $dot;
+    close $dotfile;
     push( @cmd, $dotfile->filename );
     run( \@cmd, ">", binary(), \$svg );
     # HACK: Parse the SVG and change the dimensions.
     # Get rid of width and height attributes to allow scaling.
     if( $opts->{'size'} ) {
        require XML::LibXML;
-               my $parser = XML::LibXML->new();
-               my $svgdoc = $parser->parse_string( decode_utf8( $svg ) );
+               my $parser = XML::LibXML->new( load_ext_dtd => 0 );
+               my $svgdoc;
+               eval {
+                       $svgdoc = $parser->parse_string( decode_utf8( $svg ) );
+               };
+               throw( "Could not reparse SVG: $@" ) if $@;
        my( $ew, $eh ) = @{$opts->{'size'}};
        # If the graph is wider than it is tall, set width to ew and remove height.
        # Otherwise set height to eh and remove width.