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- #!/usr/bin/perl -w
- #
- # Copyright 1999 Clark Cooper <coopercc@netheaven.com>
- # All rights reserved.
- #
- # This program is free software; you can redistribute it and/or
- # modify it under the same terms as Perl itself.
- #
- # $Revision: 1.1.1.1 $
- #
- # $Date: 2003/07/27 11:07:11 $
- #
- # This program take an XML document (either on standard input or
- # from a filename supplied as an argument) and generates corresponding
- # canonical XML document on the standard output. The definition of
- # "Canonical XML" that I'm using is taken from the working draft
- # published by W3C on 19-Jan-2000:
- #
- # http://www.w3.org/TR/2000/WD-xml-c14n-20000119.html
- #
- # The latest version of this document is at:
- #
- # http://www.w3.org/TR/xml-c14n
- #
-
- use XML::Parser;
-
- my $indoctype = 0;
- my $inroot = 0;
- my $p = new XML::Parser(ErrorContext => 2,
- Namespaces => 1,
- ParseParamEnt => 1,
- Handlers => {Start => \&sthndl,
- End => \&endhndl,
- Char => \&chrhndl,
- Proc => \&proc,
- Doctype => sub {$indoctype = 1},
- DoctypeFin => sub {$indoctype = 0}
- }
- );
-
- my $file = shift;
- if (defined $file) {
- $p->parsefile($file);
- }
- else {
- $p->parse(*STDIN);
- }
-
- ################
- ## End main
- ################
-
- sub sthndl {
- my $xp = shift;
- my $el = shift;
-
- $inroot = 1 unless $inroot;
- my $ns_index = 1;
-
- my $elns = $xp->namespace($el);
- if (defined $elns) {
- my $pfx = 'n' . $ns_index++;
- print "<$pfx:$el xmlns:$pfx=\"$elns\"";
- }
- else {
- print "<$el";
- }
-
- if (@_) {
- for (my $i = 0; $i < @_; $i += 2) {
- my $nm = $_[$i];
- my $ns = $xp->namespace($nm);
- $_[$i] = defined($ns) ? "$ns\01$nm" : "\01$nm";
- }
-
- my %atts = @_;
- my @ids = sort keys %atts;
- foreach my $id (@ids) {
- my ($ns, $nm) = split(/\01/, $id);
- my $val = $xp->xml_escape($atts{$id}, '"', "\x9", "\xA", "\xD");
- if (length($ns)) {
- my $pfx = 'n' . $ns_index++;
- print " $pfx:$nm=\"$val\" xmlns:$pfx=\"$ns\"";
- }
- else {
- print " $nm=\"$val\"";
- }
- }
- }
-
- print '>';
- } # End sthndl
-
- sub endhndl {
- my ($xp, $el) = @_;
-
- my $nm = $xp->namespace($el) ? "n1:$el" : $el;
- print "</$nm>";
- if ($xp->depth == 0) {
- $inroot = 0;
- print "\n";
- }
- } # End endhndl
-
- sub chrhndl {
- my ($xp, $data) = @_;
-
- print $xp->xml_escape($data, '>', "\xD");
- } # End chrhndl
-
- sub proc {
- my ($xp, $target, $data) = @_;
-
- unless ($indoctype) {
- print "<?$target $data?>";
- print "\n" unless $inroot;
- }
- }
-
- # Tell emacs that this is really a perl script
- #Local Variables:
- #Mode: perl
- #End:
-