(VB.NET) Hungary NAV Query Taxpayer

Demonstrates the queryTaxpayer request for the Hungarian NAV Online Invoicing System REST API v2.0.

Note: This example requires Chilkat v9.5.0.83 or greater.

For more information, see https://onlineszamla.nav.gov.hu/api/files/container/download/Online%20Szamla_Interfesz%20specifik%C3%A1ci%C3%B3_EN_v2.0.pdf

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

' Build the following XML:

' <?xml version="1.0" encoding="UTF-8"?>
' <QueryTaxpayerRequest xmlns="http://schemas.nav.gov.hu/OSA/2.0/api">
' 	<header>
' 		<requestId>RID215118906689</requestId>
' 		<timestamp>2019-09-11T11:11:08.579Z</timestamp>
' 		<requestVersion>2.0</requestVersion>
' 		<headerVersion>1.0</headerVersion>
' 	</header>
' 	<user>
' 		<login>lwilsmn0uqdxe6u</login>
' 		<passwordHash>2F43840A882CFDB7DB0FEC07D419D030D864B47B6B541DC280EF81B937B7A176E33C052B0D26638CC18A7A2C08D8D311733078A774BF43F6CA57FE8CD74DC28E</passwordHash>
' 		<taxNumber>11111111</taxNumber>
' 		<requestSignature>C5ADE8A2231C509D2887E6C2C4406CC5F72CA25B070AD3E94FADFA3F91A8A3667AF882DEDC7D67E9086E3D34A95886E929ACD8C924CD1E8357C89BEF43BA9126</requestSignature>
' 	</user>
' 	<software>
' 		<softwareId>123456789123456789</softwareId>
' 		<softwareName>string</softwareName>
' 		<softwareOperation>LOCAL_SOFTWARE</softwareOperation>
' 		<softwareMainVersion>string</softwareMainVersion>
' 		<softwareDevName>string</softwareDevName>
' 		<softwareDevContact>string</softwareDevContact>
' 		<softwareDevCountryCode>HU</softwareDevCountryCode>
' 		<softwareDevTaxNumber>string</softwareDevTaxNumber>
' 	</software>
' 	<taxNumber>22222222</taxNumber>
' </QueryTaxpayerRequest>

Dim success As Boolean
Dim crypt As New Chilkat.Crypt2

Dim dtNow As New Chilkat.CkDateTime
dtNow.SetFromCurrentSystemTime()
Debug.WriteLine(dtNow.GetAsTimestamp(False))

' The hash algorithm for the password is SHA512 (not SHA3-512).
crypt.HashAlgorithm = "sha512"
crypt.EncodingMode = "hex"
Dim myPassword As String = "my-password"
Dim passwordHash As String = crypt.HashStringENC(myPassword)

' Generate a random request ID like "RID215118906689"
Dim prng As New Chilkat.Prng
Dim sbRequestId As New Chilkat.StringBuilder
sbRequestId.Append("RID")
sbRequestId.Append(prng.RandomString(12,True,False,False))
Debug.WriteLine("generated requestId = " & sbRequestId.GetAsString())

' Calculate the requestSignature
' IMPORTANT: This example requires Chilkat v9.5.0.83 or greater.  The SHA3 hash algorithm is implemented in Chilkat v9.5.0.83, but not in earlier versions.
' IMPORTANT: This example requires Chilkat v9.5.0.83 or greater.  The SHA3 hash algorithm is implemented in Chilkat v9.5.0.83, but not in earlier versions.
' IMPORTANT: This example requires Chilkat v9.5.0.83 or greater.  The SHA3 hash algorithm is implemented in Chilkat v9.5.0.83, but not in earlier versions.
' IMPORTANT: This example requires Chilkat v9.5.0.83 or greater.  The SHA3 hash algorithm is implemented in Chilkat v9.5.0.83, but not in earlier versions.
' IMPORTANT: This example requires Chilkat v9.5.0.83 or greater.  The SHA3 hash algorithm is implemented in Chilkat v9.5.0.83, but not in earlier versions.
crypt.HashAlgorithm = "sha3-512"
Dim signatureKey As String = "ce-8f5e-215119fa7dd621DLMRHRLH2S"

Dim sbFinalHashBase As New Chilkat.StringBuilder

' First append the timestamp because we are going to remove certain chars/parts.
sbFinalHashBase.Append(dtNow.GetAsTimestamp(False))
Dim numReplaced As Integer = sbFinalHashBase.Replace("Z","")
numReplaced = sbFinalHashBase.Replace("-","")
numReplaced = sbFinalHashBase.Replace(":","")
numReplaced = sbFinalHashBase.Replace("T","")

' Prepend the requestId and append the signatureKey
sbFinalHashBase.Prepend(sbRequestId.GetAsString())
sbFinalHashBase.Append(signatureKey)

Dim requestSignature As String = crypt.HashStringENC(sbFinalHashBase.GetAsString())

Dim xml As New Chilkat.Xml
xml.Tag = "QueryTaxpayerRequest"
xml.AddAttribute("xmlns","http://schemas.nav.gov.hu/OSA/2.0/api")
xml.UpdateChildContent("header|requestId",sbRequestId.GetAsString())
xml.UpdateChildContent("header|timestamp",dtNow.GetAsTimestamp(False))
xml.UpdateChildContent("header|requestVersion","2.0")
xml.UpdateChildContent("header|headerVersion","1.0")
xml.UpdateChildContent("user|login","lwilsmn0uqdxe6u")
xml.UpdateChildContent("user|passwordHash",passwordHash)
xml.UpdateChildContent("user|taxNumber","11111111")
xml.UpdateChildContent("user|requestSignature",requestSignature)
xml.UpdateChildContent("software|softwareId","123456789123456789")
xml.UpdateChildContent("software|softwareName","string")
xml.UpdateChildContent("software|softwareOperation","LOCAL_SOFTWARE")
xml.UpdateChildContent("software|softwareMainVersion","string")
xml.UpdateChildContent("software|softwareDevName","string")
xml.UpdateChildContent("software|softwareDevContact","string")
xml.UpdateChildContent("software|softwareDevCountryCode","HU")
xml.UpdateChildContent("software|softwareDevTaxNumber","string")
xml.UpdateChildContent("taxNumber","22222222")

' POST the XML to https://api-test.onlineszamla.nav.gov.hu/invoiceService/v2/queryTaxpayer
Dim http As New Chilkat.Http
http.Accept = "application/xml"
http.SetRequestHeader("Content-Type","application/xml")
Dim endpoint As String = "https://api-test.onlineszamla.nav.gov.hu/invoiceService/v2/queryTaxpayer"
Dim resp As Chilkat.HttpResponse = http.PostXml(endpoint,xml.GetXml(),"utf-8")
If (http.LastMethodSuccess = False) 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 body:")
Debug.WriteLine(respXml.GetXml())



' The result looks like this:

' <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
' <QueryTaxpayerResponse xmlns="http://schemas.nav.gov.hu/OSA/2.0/api" xmlns:ns2="http://schemas.nav.gov.hu/OSA/2.0/data">
'     <header>
'         <requestId>RID847153193061</requestId>
'         <timestamp>2020-03-24T16:00:34Z</timestamp>
'         <requestVersion>2.0</requestVersion>
'         <headerVersion>1.0</headerVersion>
'     </header>
'     <result>
'         <funcCode>OK</funcCode>
'     </result>
'     <software>
'         <softwareId>123456789123456789</softwareId>
'         <softwareName>string</softwareName>
'         <softwareOperation>LOCAL_SOFTWARE</softwareOperation>
'         <softwareMainVersion>string</softwareMainVersion>
'         <softwareDevName>string</softwareDevName>
'         <softwareDevContact>string</softwareDevContact>
'         <softwareDevCountryCode>HU</softwareDevCountryCode>
'         <softwareDevTaxNumber>string</softwareDevTaxNumber>
'     </software>
'     <infoDate>1993-01-01T00:00:00.000+01:00</infoDate>
'     <taxpayerValidity>true</taxpayerValidity>
'     <taxpayerData>
'         <taxpayerName>some taxpayer name</taxpayerName>
'         <taxNumberDetail>
'             <ns2:taxpayerId>22222222</ns2:taxpayerId>
'             <ns2:vatCode>2</ns2:vatCode>
'         </taxNumberDetail>
'         <taxpayerAddressList>
'             <taxpayerAddressItem>
'                 <taxpayerAddressType>HQ</taxpayerAddressType>
'                 <taxpayerAddress>
'                     <ns2:countryCode>HU</ns2:countryCode>
'                     <ns2:postalCode>1121</ns2:postalCode>
'                     <ns2:city>BUDAPEST 12</ns2:city>
'                     <ns2:streetName>ABCD</ns2:streetName>
'                     <ns2:publicPlaceCategory>UTCA</ns2:publicPlaceCategory>
'                     <ns2:number>20</ns2:number>
'                 </taxpayerAddress>
'             </taxpayerAddressItem>
'         </taxpayerAddressList>
'     </taxpayerData>
' </QueryTaxpayerResponse>

' Use this online tool to generate parsing code from sample XML: 
' Generate Parsing Code from XML



Dim QueryTaxpayerResponse_xmlns As String = respXml.GetAttrValue("xmlns")
Dim QueryTaxpayerResponse_xmlns_ns2 As String = respXml.GetAttrValue("xmlns:ns2")
Dim requestId As String = respXml.GetChildContent("header|requestId")
Dim timestamp As String = respXml.GetChildContent("header|timestamp")
Dim requestVersion As String = respXml.GetChildContent("header|requestVersion")
Dim headerVersion As String = respXml.GetChildContent("header|headerVersion")
Dim funcCode As String = respXml.GetChildContent("result|funcCode")
Dim softwareId As String = respXml.GetChildContent("software|softwareId")
Dim softwareName As String = respXml.GetChildContent("software|softwareName")
Dim softwareOperation As String = respXml.GetChildContent("software|softwareOperation")
Dim softwareMainVersion As String = respXml.GetChildContent("software|softwareMainVersion")
Dim softwareDevName As String = respXml.GetChildContent("software|softwareDevName")
Dim softwareDevContact As String = respXml.GetChildContent("software|softwareDevContact")
Dim softwareDevCountryCode As String = respXml.GetChildContent("software|softwareDevCountryCode")
Dim softwareDevTaxNumber As String = respXml.GetChildContent("software|softwareDevTaxNumber")
Dim infoDate As String = respXml.GetChildContent("infoDate")
Dim taxpayerValidity As String = respXml.GetChildContent("taxpayerValidity")
Dim taxpayerName As String = respXml.GetChildContent("taxpayerData|taxpayerName")
Dim ns2_taxpayerId As Integer = respXml.GetChildIntValue("taxpayerData|taxNumberDetail|ns2:taxpayerId")
Dim ns2_vatCode As Integer = respXml.GetChildIntValue("taxpayerData|taxNumberDetail|ns2:vatCode")
Dim taxpayerAddressType As String = respXml.GetChildContent("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddressType")
Dim ns2_countryCode As String = respXml.GetChildContent("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddress|ns2:countryCode")
Dim ns2_postalCode As Integer = respXml.GetChildIntValue("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddress|ns2:postalCode")
Dim ns2_city As String = respXml.GetChildContent("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddress|ns2:city")
Dim ns2_streetName As String = respXml.GetChildContent("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddress|ns2:streetName")
Dim ns2_publicPlaceCategory As String = respXml.GetChildContent("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddress|ns2:publicPlaceCategory")
Dim ns2_number As Integer = respXml.GetChildIntValue("taxpayerData|taxpayerAddressList|taxpayerAddressItem|taxpayerAddress|ns2:number")