(Go) Amazon MWS Upload Invoice

Demonstrates how to upload an invoice using _UPLOAD_VAT_INVOICE_FeedType to submit an invoice for an order.

For more information, see https://m.media-amazon.com/images/G/03/B2B/invoice-uploader-developer-documentation.pdf

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

    var success bool

    rest := chilkat.NewRest()

    // Connect to the Amazon MWS REST server.
    // 
    // Make sure to connect to the correct Amazon MWS Endpoint, otherwise
    // you'll get an HTTP 401 response code.
    // 
    // See Amazon MWS endpoints and MarketplaceId values

    bTls := true
    port := 443
    bAutoReconnect := true
    success = rest.Connect("mws.amazonservices.com",port,bTls,bAutoReconnect)

    rest.SetHost("mws.amazonservices.com")

    // MarketplaceList.Id parameter This should be the marketplace in which the order was placed. Only one marketplace must be used per order.T
    // Here are the marketplace ID's
    // Spain: A1RKKUPIHCS9HS
    // UK: A1F83G8C2ARO7P
    // France: A13V1IB3VIYZZH
    // Germany: A1PA6795UKMFR9
    // Italy: APJ6JRA9NG5V4
    // ...
    // (See https://docs.developer.amazonservices.com/en_US/dev_guide/DG_Endpoints.html)

    // FeedOptions parameter  Seller can input key value pairs to give important metadata along with the PDF invoice.
    rest.AddQueryParam("FeedOptions","metadata:orderid=206-2341234-3455465;metadata:invoicenumber=INT-3431-XJE3;metadata:documenttype=Invoice")

    // Load the PDF invoice file that is to be the body of the HTTP POST request.
    pdfData := chilkat.NewBinData()
    success = pdfData.LoadFile("qa_data/pdf/sample.pdf")

    // Get the MD5 hash of the PDF data.
    crypt := chilkat.NewCrypt2()
    crypt.SetHashAlgorithm("md5")
    crypt.SetEncodingMode("base64")
    md5Hash := crypt.HashBdENC(pdfData)

    rest.AddQueryParam("AWSAccessKeyId","0PB842ExampleN4ZTR2")
    rest.AddQueryParam("Action","SubmitFeed")
    rest.AddQueryParam("FeedType","_UPLOAD_VAT_INVOICE_")
    rest.AddQueryParam("MWSAuthToken","EXAMPLE-amzn.mws.4ea38b7b-f563-7709-4bae-87aea-EXAMPLE")

    rest.AddQueryParam("MarketplaceIdList.Id.1","ATVExampleDER")
    rest.AddQueryParam("SellerId","A1XExample5E6")
    rest.AddQueryParam("ContentMD5Value",*md5Hash)
    rest.AddQueryParam("SignatureMethod","HmacSHA256")
    rest.AddQueryParam("SignatureVersion","2")
    rest.AddQueryParam("Version","2009-01-01")

    // Add the MWS Signature param.  (Also adds the Timestamp parameter using the curent system date/time.)
    rest.AddMwsSignature("POST","/Feeds/2009-01-01","mws.amazonservices.com","YOUR_MWS_SECRET_ACCESS_KEY_ID")

    rest.AddHeader("Content-Type","application/octet-stream")
    sbResponseBody := chilkat.NewStringBuilder()
    success = rest.FullRequestBd("POST","/Feeds/2009-01-01",pdfData,sbResponseBody)
    if rest.LastMethodSuccess() != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        pdfData.DisposeBinData()
        crypt.DisposeCrypt2()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    if rest.ResponseStatusCode() != 200 {
        // Examine the request/response to see what happened.
        fmt.Println("response status code = ", rest.ResponseStatusCode())
        fmt.Println("response status text = ", rest.ResponseStatusText())
        fmt.Println("response header: ", rest.ResponseHeader())
        fmt.Println("response body: ", *sbResponseBody.GetAsString())
        fmt.Println("---")
        fmt.Println("LastRequestStartLine: ", rest.LastRequestStartLine())
        fmt.Println("LastRequestHeader: ", rest.LastRequestHeader())
    }

    // Examine the XML returned in the response body.
    fmt.Println(*sbResponseBody.GetAsString())
    fmt.Println("----")
    fmt.Println("Success.")

    rest.DisposeRest()
    pdfData.DisposeBinData()
    crypt.DisposeCrypt2()
    sbResponseBody.DisposeStringBuilder()