Current File : //usr/share/doc/libxml-parser-perl/examples/canonical
#!/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:
Mini Shell