(VB.NET) 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

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

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

Dim success As Boolean


Dim rest As New Chilkat.Rest

' 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

Dim bTls As Boolean = True
Dim port As Integer = 443
Dim bAutoReconnect As Boolean = True
success = rest.Connect("mws.amazonservices.com",port,bTls,bAutoReconnect)

rest.Host = "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.
Dim pdfData As New Chilkat.BinData
success = pdfData.LoadFile("qa_data/pdf/sample.pdf")

' Get the MD5 hash of the PDF data.
Dim crypt As New Chilkat.Crypt2
crypt.HashAlgorithm = "md5"
crypt.EncodingMode = "base64"
Dim md5Hash As String = 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")
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestBd("POST","/Feeds/2009-01-01",pdfData,sbResponseBody)
If (rest.LastMethodSuccess <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


If (rest.ResponseStatusCode <> 200) Then
    ' Examine the request/response to see what happened.
    Debug.WriteLine("response status code = " & rest.ResponseStatusCode)
    Debug.WriteLine("response status text = " & rest.ResponseStatusText)
    Debug.WriteLine("response header: " & rest.ResponseHeader)
    Debug.WriteLine("response body: " & sbResponseBody.GetAsString())
    Debug.WriteLine("---")
    Debug.WriteLine("LastRequestStartLine: " & rest.LastRequestStartLine)
    Debug.WriteLine("LastRequestHeader: " & rest.LastRequestHeader)
End If


' Examine the XML returned in the response body.
Debug.WriteLine(sbResponseBody.GetAsString())
Debug.WriteLine("----")
Debug.WriteLine("Success.")