(Go) Hungary NAV Token Exchange

Demonstrates the tokenExchange 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:

    // Use this online tool to generate code from sample XML: 
    // Generate Code to Create XML

    // <?xml version="1.0" encoding="UTF-8"?>
    // <TokenExchangeRequest xmlns="http://schemas.nav.gov.hu/OSA/2.0/api">
    // 	<header>
    // 		<requestId>RID896801578348</requestId>
    // 		<timestamp>2019-09-11T10:55:31.440Z</timestamp>
    // 		<requestVersion>2.0</requestVersion>
    // 		<headerVersion>1.0</headerVersion>
    // 	</header>
    // 	<user>
    // 		<login>lwilsmn0uqdxe6u</login>
    // 		<passwordHash>2F43840A882CFDB7DB0FEC07D419D030D864B47B6B541DC280EF81B937B7A176E33C052B0D26638CC18A7A2C08D8D311733078A774BF43F6CA57FE8CD74DC28E</passwordHash>
    // 		<taxNumber>11111111</taxNumber>
    // 		<requestSignature>B4B5E0F197BFFD3DF69BCC98D3BE775F65FD5445EEF95C9D6B6C59425F2B81C4F6DA1FD563B0C7E7D98AF1E1725E5C63C2803B5D3A93D1C02ED354AC92F2CC94</requestSignature>
    // 		<!--<signKey>ac-ac3a-7f661bff7d342N43CYX4U9FG</signKey>-->
    // 	</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>
    // </TokenExchangeRequest>

    var success bool
    crypt := chilkat.NewCrypt2()

    dtNow := chilkat.NewCkDateTime()
    dtNow.SetFromCurrentSystemTime()
    fmt.Println(*dtNow.GetAsTimestamp(false))

    // The hash algorithm for the password is SHA512 (not SHA3-512).
    crypt.SetHashAlgorithm("sha512")
    crypt.SetEncodingMode("hex")
    myPassword := "my-password"
    passwordHash := crypt.HashStringENC(myPassword)

    // Generate a random request ID like "RID215118906689"
    prng := chilkat.NewPrng()
    sbRequestId := chilkat.NewStringBuilder()
    sbRequestId.Append("RID")
    sbRequestId.Append(*prng.RandomString(12,true,false,false))
    fmt.Println("generated requestId = ", *sbRequestId.GetAsString())

    // Calculate the requestSignature
    crypt.SetHashAlgorithm("sha3-512")
    signatureKey := "ce-8f5e-215119fa7dd621DLMRHRLH2S"

    sbFinalHashBase := chilkat.NewStringBuilder()

    // First append the timestamp because we are going to remove certain chars/parts.
    sbFinalHashBase.Append(*dtNow.GetAsTimestamp(false))
    numReplaced := 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)

    requestSignature := crypt.HashStringENC(*sbFinalHashBase.GetAsString())

    xml := chilkat.NewXml()
    xml.SetTag("TokenExchangeRequest")
    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")

    // POST the XML to https://api-test.onlineszamla.nav.gov.hu/invoiceService/v2/tokenExchange
    http := chilkat.NewHttp()
    http.SetAccept("application/xml")
    http.SetRequestHeader("Content-Type","application/xml")
    endpoint := "https://api-test.onlineszamla.nav.gov.hu/invoiceService/v2/tokenExchange"
    resp := http.PostXml(endpoint,*xml.GetXml(),"utf-8")
    if http.LastMethodSuccess() == false {
        fmt.Println(http.LastErrorText())
        crypt.DisposeCrypt2()
        dtNow.DisposeCkDateTime()
        prng.DisposePrng()
        sbRequestId.DisposeStringBuilder()
        sbFinalHashBase.DisposeStringBuilder()
        xml.DisposeXml()
        http.DisposeHttp()
        return
    }

    fmt.Println("Response status code = ", resp.StatusCode())

    respXml := chilkat.NewXml()
    respXml.LoadXml(resp.BodyStr())
    fmt.Println("Response body:")
    fmt.Println(*respXml.GetXml())

    // Save our exchange token to a file to be used for subsequent requests.
    respXml.SaveXml("qa_data/tokens/nav_exchange_token.xml")

    resp.DisposeHttpResponse()

    // The result looks like this:

    // <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    // <TokenExchangeResponse xmlns="http://schemas.nav.gov.hu/OSA/2.0/api" xmlns:ns2="http://schemas.nav.gov.hu/OSA/2.0/data">
    //     <header>
    //         <requestId>RID789246611489</requestId>
    //         <timestamp>2020-03-25T14:14:36Z</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>
    //     <encodedExchangeToken>2lR5v57Tl ... 9n4tIWCYgjKQ==</encodedExchangeToken>
    //     <tokenValidityFrom>2020-03-25T15:14:36.987+01:00</tokenValidityFrom>
    //     <tokenValidityTo>2020-03-25T15:19:36.987+01:00</tokenValidityTo>
    // </TokenExchangeResponse>

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

    TokenExchangeResponse_xmlns := respXml.GetAttrValue("xmlns")
    TokenExchangeResponse_xmlns_ns2 := respXml.GetAttrValue("xmlns:ns2")
    requestId := respXml.GetChildContent("header|requestId")
    timestamp := respXml.GetChildContent("header|timestamp")
    requestVersion := respXml.GetChildContent("header|requestVersion")
    headerVersion := respXml.GetChildContent("header|headerVersion")
    funcCode := respXml.GetChildContent("result|funcCode")
    softwareId := respXml.GetChildContent("software|softwareId")
    softwareName := respXml.GetChildContent("software|softwareName")
    softwareOperation := respXml.GetChildContent("software|softwareOperation")
    softwareMainVersion := respXml.GetChildContent("software|softwareMainVersion")
    softwareDevName := respXml.GetChildContent("software|softwareDevName")
    softwareDevContact := respXml.GetChildContent("software|softwareDevContact")
    softwareDevCountryCode := respXml.GetChildContent("software|softwareDevCountryCode")
    softwareDevTaxNumber := respXml.GetChildContent("software|softwareDevTaxNumber")
    encodedExchangeToken := respXml.GetChildContent("encodedExchangeToken")
    tokenValidityFrom := respXml.GetChildContent("tokenValidityFrom")
    tokenValidityTo := respXml.GetChildContent("tokenValidityTo")

    crypt.DisposeCrypt2()
    dtNow.DisposeCkDateTime()
    prng.DisposePrng()
    sbRequestId.DisposeStringBuilder()
    sbFinalHashBase.DisposeStringBuilder()
    xml.DisposeXml()
    http.DisposeHttp()
    respXml.DisposeXml()