Classic ASP
Amazon SP-API Request an LWA access token

Request an LWA access token, make a secure HTTP POST to the LWA authentication server (https://api.amazon.com/auth/o2/token)
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Classic ASP
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

set http = Server.CreateObject("Chilkat.Http")

' Implements the following CURL command:

' curl -X POST https://example.com/auth/o2/token \
'   -H "Host: api.amazon.com" \
'   -H "Content-Type: application/x-www-form-urlencoded;charset=UTF-8" \
'   -d "grant_type=refresh_token" \
'   -d "refresh_token=Aztr|..." \
'   -d "client_id=foodev" \
'   -d "client_secret=Y76SDl2F"

' Use the following online tool to generate HTTP code from a CURL command
' Convert a cURL Command to HTTP Source Code

set req = Server.CreateObject("Chilkat.HttpRequest")
req.AddParam "grant_type","refresh_token"
req.AddParam "refresh_token","Aztr|..."
req.AddParam "client_id","foodev"
req.AddParam "client_secret","Y76SDl2F"

req.AddHeader "Host","api.amazon.com"

req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

set resp = Server.CreateObject("Chilkat.HttpResponse")
success = http.HttpReq("https://api.amazon.com/auth/o2/token",req,resp)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>"
    Response.End
End If

statusCode = resp.StatusCode
Response.Write "<pre>" & Server.HTMLEncode( "Status Code = " & statusCode) & "</pre>"

set json = Server.CreateObject("Chilkat.JsonObject")
success = json.Load(resp.BodyStr)

json.EmitCompact = 0
Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"

If (statusCode <> 200) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Failed.") & "</pre>"
    Response.End
End If

' Success returns this JSON:

' {
'   "access_token": "Atza|...",
'   "refresh_token": "Atzr|...",
'   "token_type": "bearer",
'   "expires_in": 3600
' }

' Save the JSON token to a file for use in subsequent calls.
' (this example is passing a relative file path.  You don't need to save to a file
' if, for example, you keep the access token in-memory for subsequent use...)
success = json.WriteFile("qa_data/tokens/sp_api_lwa_token.json")

Response.Write "<pre>" & Server.HTMLEncode( "access_token: " & json.StringOf("access_token")) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Success.") & "</pre>"

%>
</body>
</html>