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(PowerBuilder) Canonicalize XML Fragment

Demonstrates how to canonicalize a fragment of an XML document. The fragment is identified by the element having an Id attribute equal to a specified value. (The Id attribute can have any namespace, and the attribute name is case-insensitive (thus "ID", "Id", "id", etc. match).

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Http
oleobject loo_SbXml
oleobject loo_Canon
string ls_CanonVersion
integer li_WithComments
string ls_PrefixList
string ls_Url
integer li_Success
string ls_XmlCanonFrag

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

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat_9_5_0.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_SbXml = create oleobject
li_rc = loo_SbXml.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_Canon = create oleobject
li_rc = loo_Canon.ConnectToNewObject("Chilkat_9_5_0.XmlDSig")

//  Use exclusive XML canonicalization.
ls_CanonVersion = "EXCL_C14N"
li_WithComments = 0
//  The optional inclusive namespaces prefix list if using exclusive canonicalization.
ls_PrefixList = ""

ls_Url = "https://www.chilkatsoft.com/exampleData/canonicalizeFragmentTest.xml"
li_Success = loo_Http.QuickGetSb(ls_Url,loo_SbXml)

//  This is the input XML:

//  <?xml version="1.0" encoding="UTF-8"?>
//  <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
//  <SignedInfo>
//    <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
//    <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
//    <Reference URI="#object">
//      <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
//      <DigestValue>OPnpF/ZNLDxJ/I+1F3iHhlmSwgo=</DigestValue>
//    </Reference>
//  </SignedInfo>
//  <SignatureValue>nihUFQg4mDhLgecvhIcKb9Gz8VRTOlw+adiZOBBXgK4JodEe5aFfCqm8WcRIT8GL
//  LXSk8PsUP4//SsKqUBQkpotcAqQAhtz2v9kCWdoUDnAOtFZkd/CnsZ1sge0ndha4
//  0wWDV+nOWyJxkYgicvB8POYtSmldLLepPGMz+J7/Uws=</SignatureValue>
//  <KeyInfo>
//    <KeyValue>
//      <RSAKeyValue>
//        <Modulus>4IlzOY3Y9fXoh3Y5f06wBbtTg94Pt6vcfcd1KQ0FLm0S36aGJtTSb6pYKfyX7PqC
//        UQ8wgL6xUJ5GRPEsu9gyz8ZobwfZsGCsvu40CWoT9fcFBZPfXro1Vtlh/xl/yYHm
//        +Gzqh0Bw76xtLHSfLfpVOrmZdwKmSFKMTvNXOFd0V18=</Modulus>
//        <Exponent>AQAB</Exponent>
//      </RSAKeyValue>
//    </KeyValue>
//  </KeyInfo>
//  <Object Id="object">some text
//    with spaces and CR-LF.</Object>
//  </Signature>

//  Canonicalize and return the fragment of XML starting at the element where the Id attribute equals "object".
ls_XmlCanonFrag = loo_Canon.CanonicalizeFragment(loo_SbXml.GetAsString(),"object",ls_CanonVersion,ls_PrefixList,li_WithComments)
Write-Debug ls_XmlCanonFrag

//  The output is:
// 
//  <Object xmlns="http://www.w3.org/2000/09/xmldsig#" Id="object">some text
//    with spaces and CR-LF.</Object>
// 


destroy loo_Http
destroy loo_SbXml
destroy loo_Canon

 

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