(Perl) XML Inclusive Canonicalization

Demonstrates how to convert XML to the Inclusive XML Canonicalization form as specified in http://www.w3.org/TR/xml-c14n/

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

# The XML digital signature verification class provides utility methods for
# XML canonicalization.  This example demonstrates how to do inclusive XML canonicalization.

$http = chilkat::CkHttp->new();
$sbXml = chilkat::CkStringBuilder->new();
$canon = chilkat::CkXmlDSig->new();

# Use inclusive XML canonicalization.
$canonVersion = "C14N";
$withComments = 0;

$url = "https://www.chilkatsoft.com/exampleData/c14n/test7.xml";
$success = $http->QuickGetSb($url,$sbXml);

# This is the input XML:
# The XML comment is referring to when exclusive XML canonicalization is applied.  With inclusive canonicalization, the namespace nodes
# are kept, as we'll see below..

# <doc>
# <!-- A namespace node N is ignored if the nearest ancestor element of the node's parent element that is in the node-set has a namespace node in the node-set with the same local name and value as N. -->
# 	<animal xmlns:aa="https://www.animal.com/">
# 		<reptile xmlns:bb="https://www.reptile.com/">
#   			<lizard xmlns="" type="african fat tailed" abc="xyz" xmlns:aa="https://www.animal.com/" />
#   			<snake type="poisonous rattler" xmlns:bb="https://www.reptile.com/" >
#   			</snake>
#   		</reptile>
#   	</animal>
# </doc>

$xmlInclCanon = $canon->canonicalizeXml($sbXml->getAsString(),$canonVersion,$withComments);
print $xmlInclCanon . "\r\n";

# The C14N (inclusive) canonicalization is:

# <doc>
# 
# 	<animal xmlns:aa="https://www.animal.com/">
# 		<reptile xmlns:bb="https://www.reptile.com/">
#   			<lizard abc="xyz" type="african fat tailed"></lizard>
#   			<snake type="poisonous rattler">
#   			</snake>
#   		</reptile>
#   	</animal>
# </doc>

# To see the difference, let's do exclusive canonicalization..
$canonVersion = "EXCL_C14N";

$xmlExclCanon = $canon->canonicalizeXml($sbXml->getAsString(),$canonVersion,$withComments);
print $xmlExclCanon . "\r\n";

# // The C14N (exclusive) canonicalization is:
# 
# <doc>
# 
# 	<animal>
# 		<reptile>
#   			<lizard abc="xyz" type="african fat tailed"></lizard>
#   			<snake type="poisonous rattler">
#   			</snake>
#   		</reptile>
#   	</animal>
# </doc>