(Swift 3,4,5...) Access SOAP Body XML

Demonstrates how to access the SOAP body in XML.

<?xml version="1.0" encoding="utf-8" ?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:cfdi="http://www.sat.gob.mx/cfd/3">
    <soapenv:Body>
        <tfd:TimbreFiscalDigital version="1.0" />
    </soapenv:Body>
</soapenv:Envelope>

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func chilkatTest() {
    let xSoapEnvelope = CkoXml()!

    var success: Bool
    success = xSoapEnvelope.loadFile("soapMessage.xml")
    if success != true {
        print("\(xSoapEnvelope.lastErrorText!)")
        return
    }

    // The root node is the SOAP envelope, and in this particular case has a Tag of "soapenv:Envelope"
    print("SOAP envelope tag: \(xSoapEnvelope.tag!)")

    // The SOAP body (in this case) is a direct child of the SOAP envelope
    // and has the tag "soapenv:Body"
    var xSoapBody: CkoXml? = xSoapEnvelope.findChild("soapenv:Body")
    if xSoapEnvelope.lastMethodSuccess == false {
        print("No direct child having the tag \"soapenv:Body\" was found.")
        return
    }

    // The SOAP message body is the direct child of the SOAP envelope body:
    var xMessageBody: CkoXml? = xSoapBody!.findChild("TimbreFiscalDigital")
    if xSoapBody!.lastMethodSuccess == false {
        print("No direct child having the tag \"TimbreFiscalDigital\" was found.")
        xSoapBody = nil
        return
    }

    // If desired, get the XML of just the SOAP message body:
    var soapMessageXml: String? = xSoapBody!.getXml()

    xMessageBody = nil
    xSoapBody = nil

    // --------------------------------------------------------------------------------
    // Also see Chilkat's Online WSDL Code Generator
    // to generate code and SOAP Request and Response XML for each operation in a WSDL.
    // --------------------------------------------------------------------------------

}