(VB.NET) Walmart - Get Inventory for an Item

Demonstrates how to get inventory for an item and parse the result.

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

' ---------------------------------------------------------------------------------------------------------
' Note: This example is deprecated.  The Walmart API no longer uses the Signature method of authenticating.
' Walmart now uses OAuth2.  
' ---------------------------------------------------------------------------------------------------------

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

' Sends the following GET request:
' GET https://marketplace.walmartapis.com/v2/inventory?sku={SKU}

Dim sbUrl As New Chilkat.StringBuilder
Dim success As Boolean = sbUrl.Append("https://marketplace.walmartapis.com/v2/inventory?sku={SKU}")
Dim numReplaced As Integer = sbUrl.Replace("{SKU}","HOPP~904~51041")

Dim requestMethod As String = "GET"

' First we need to generate a signature for our request.
' The signature needs to be re-generated for each new Walmart HTTP request.
Dim authUtil As New Chilkat.AuthUtil

Dim wmConsumerId As String = "WALMART_CONSUMER_ID"
Dim wmPrivateKey As String = "WALMART_PRIVATE_KEY"
Dim jsonStr As String = authUtil.WalmartSignature(sbUrl.GetAsString(),wmConsumerId,wmPrivateKey,requestMethod)
If (authUtil.LastMethodSuccess <> True) Then
    Debug.WriteLine(authUtil.LastErrorText)
    Exit Sub
End If


' The JSON returned by WalmartSignature contains the values to be used in the following
' header fields: WM_SEC.AUTH_SIGNATURE, WM_SEC.TIMESTAMP, and WM_QOS.CORRELATION_ID
Dim json As New Chilkat.JsonObject
json.Load(jsonStr)

Dim http As New Chilkat.Http
http.SetRequestHeader("WM_SVC.NAME","Walmart Marketplace")
http.SetRequestHeader("WM_QOS.CORRELATION_ID",json.StringOf("correlation_id"))
http.SetRequestHeader("WM_SEC.TIMESTAMP",json.StringOf("timestamp"))
http.SetRequestHeader("WM_SEC.AUTH_SIGNATURE",json.StringOf("signature"))
http.SetRequestHeader("WM_CONSUMER.ID",wmConsumerId)
http.Accept = "application/xml"

' Note: Do not explicitly set the "Host" header.  Chilkat will set it automatically.


Dim xmlStr As String = http.QuickGetStr(sbUrl.GetAsString())
If (http.LastMethodSuccess <> True) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim xml As New Chilkat.Xml
xml.LoadXml(xmlStr)

' A successful response should have a 200 response status
If (http.LastStatus <> 200) Then
    Debug.WriteLine(xml.GetXml())
    Debug.WriteLine("Response Status Code: " & http.LastStatus)
    Debug.WriteLine("Failed.")
    Exit Sub
End If



' A sample XML response is shown below..
Debug.WriteLine(xml.GetXml())
Debug.WriteLine("--")

' To get the quantity:
Dim quantity As Integer = xml.GetChildIntValue("quantity|amount")
Debug.WriteLine("quantity = " & quantity)



' ---------------------------------------
' Sample XML response
' ---------------------------------------

' <?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
' <inventory xmlns="http://walmart.com/">
'     <sku>HOPP~904~51041</sku>
'     <quantity>
'         <unit>EACH</unit>
'         <amount>234</amount>
'     </quantity>
'     <fulfillmentLagTime>5</fulfillmentLagTime>
' </inventory>