(VB.NET) PEPPOL Document Validation

Demonstrates how to call a Web service to validate your PEPPOL documents according to the latest PEPPOL rules. The validation service requires UBL files.

For more information, see https://peppol.helger.com/public/locale-en_US/menuitem-validation-ws2

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' This example assumes the Chilkat HTTP API to have been previously unlocked.
' See Global Unlock Sample for sample code.


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

Dim http As New Chilkat.Http

' We are sending the following POST:

' POST /wsdvs HTTP/1.1
' Host: peppol.helger.com
' Content-Type: application/soap+xml; charset=utf-8
' Content-Length: <length>
' 
' <?xml version="1.0"?>
' <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
' <S:Body>
' <validateRequestInput xmlns="http://peppol.helger.com/ws/documentvalidationservice/201701/" VESID="eu.peppol.bis2:t10:3.3.0" displayLocale="en">
' <XML>...ENTITY_ENCODED_INVOICE_XML_GOES_HERE...</XML>
' </validateRequestInput>
' </S:Body>
' </S:Envelope>

' Build the SOAP XML shown above.
' First load the PEPPOL invoice that will be the data contained in the <XML>...</XML> SOAP element.
' We are using the XML invoice obtained from https://github.com/austriapro/ebinterface-standards/blob/master/schemas/ebInterface5p0/samples/ebinterface_5p0_sample_ecosio.xml
Dim sbPeppolInvoiceXml As New Chilkat.StringBuilder
Dim success As Boolean = sbPeppolInvoiceXml.LoadFile("qa_data/xml/peppol_invoice.xml","utf-8")

Dim xml As New Chilkat.Xml
xml.Tag = "S:Envelope"
xml.AddAttribute("xmlns:S","http://schemas.xmlsoap.org/soap/envelope/")
xml.UpdateAttrAt("S:Body|validateRequestInput",True,"xmlns","http://peppol.helger.com/ws/documentvalidationservice/201701/")
xml.UpdateAttrAt("S:Body|validateRequestInput",True,"VESID","at.ebinterface:invoice:5.0")
xml.UpdateAttrAt("S:Body|validateRequestInput",True,"displayLocale","en")
xml.UpdateChildContent("S:Body|validateRequestInput|XML",sbPeppolInvoiceXml.GetAsString())

' Set the Content-Type of the request.
http.SetRequestHeader("Content-Type","text/xml")

' We don't need to specify the Content-Length or Host headers.  Chilkat automatically adds them.

' Send the request...
Dim resp As Chilkat.HttpResponse = http.PostXml("https://peppol.helger.com/wsdvs",xml.GetXml(),"utf-8")
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Response Status Code = " & resp.StatusCode)

Dim respXml As New Chilkat.Xml
respXml.LoadXml(resp.BodyStr)


Debug.WriteLine("Response XML:")
Debug.WriteLine(respXml.GetXml())

' A success repsonse looks like this:

' <?xml version="1.0" encoding="UTF-8"?>
' <S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
'     <S:Body>
'         <validateResponseOutput xmlns="http://peppol.helger.com/ws/documentvalidationservice/201701/" success="true" interrupted="false" mostSevereErrorLevel="SUCCESS">
'             <Result success="true" artifactType="xsd" artifactPath="/schemas/ebinterface/ebinterface-5.0.xsd"/>
'         </validateResponseOutput>
'     </S:Body>
' </S:Envelope>