Classic ASP
Rabobank Refresh OAuth2 Access Token

Demonstrates how to refresh an expired Rabobank OAuth2 access token. (No interactive user interaction is required to refresh an access 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 requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' We previously obtained an access token and saved the JSON to a file using this example:
' Get Rabobank OAuth2 Access Token

set json = Server.CreateObject("Chilkat.JsonObject")
success = json.LoadFile("qa_data/tokens/rabobank.json")
If (success <> 1) Then
    Response.End
End If

' {
'   "token_type": "Bearer",
'   "access_token": "AAIkYTU0ZWM ... sxE0KL0HHWw",
'   "expires_in": 3600,
'   "consented_on": 1584641121,
'   "scope": "ais.balances.read ais.transactions.read-90days ais.transactions.read-history",
'   "refresh_token": "AAJXXSdN ... Uiblz9ILkxNBlytRGA",
'   "refresh_token_expires_in": 157784760,
'   "expires_on": "1584644722"
' }

' Refresh the access token by sending a POST like this:
' 

' POST /oauth2/token
' Headers:
'     Content-Type: application/x-www-form-urlencoded
'     Authorization: Basic BASE64(CLIENT_ID + ":" + CLIENT_SECRET)
' 
' Body (x-www-form-urlencoded):
'     grant_type: refresh_token
'     refresh_token: REFRESH_TOKEN

set req = Server.CreateObject("Chilkat.HttpRequest")
req.AddParam "grant_type","refresh_token"
req.AddParam "refresh_token",json.StringOf("refresh_token")

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

' Causes the "Authorization: Basic BASE64(CLIENT_ID + ":" + CLIENT_SECRET)" header to be added..
http.BasicAuth = 1
http.Login = "YOUR_APP_CLIENT_ID"
http.Password = "YOUR_APP_CLIENT_SECRET"

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

set resp = Server.CreateObject("Chilkat.HttpResponse")
success = http.HttpReq("https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/token",req,resp)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( http.LastErrorText) & "</pre>"
    Response.End
End If

' Load the JSON response.
success = json.Load(resp.BodyStr)
json.EmitCompact = 0

' Show the JSON response.
Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"

Response.Write "<pre>" & Server.HTMLEncode( "Response status code: " & resp.StatusCode) & "</pre>"

' If the response status code is not 200, then it's an error.
If (resp.StatusCode <> 200) Then
    Response.End
End If

' Save the refreshed access token JSON to a file for future requests.
set fac = Server.CreateObject("Chilkat.FileAccess")
success = fac.WriteEntireTextFile("qa_data/tokens/rabobank.json",json.Emit(),"utf-8",0)

%>
</body>
</html>