(Lianja) XML Inclusive Canonicalization

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

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// 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.

loHttp = createobject("CkHttp")
loSbXml = createobject("CkStringBuilder")
loCanon = createobject("CkXmlDSig")

// Use inclusive XML canonicalization.
lcCanonVersion = "C14N"
llWithComments = .F.

lcUrl = "https://www.chilkatsoft.com/exampleData/c14n/test7.xml"
llSuccess = loHttp.QuickGetSb(lcUrl,loSbXml)

// 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>

lcXmlInclCanon = loCanon.CanonicalizeXml(loSbXml.GetAsString(),lcCanonVersion,llWithComments)
? lcXmlInclCanon

// 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..
lcCanonVersion = "EXCL_C14N"

lcXmlExclCanon = loCanon.CanonicalizeXml(loSbXml.GetAsString(),lcCanonVersion,llWithComments)
? lcXmlExclCanon

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


release loHttp
release loSbXml
release loCanon