(VBScript) Rabobank OAuth2 Access Token

Demonstrates how to get an OAuth 2.0 access token to access Rabobank API's

Important: This example is for desktop apps only. (It is not for web-based applications.)

Your app defined in the Rabobank portal should look something like this. (Our test app is named "chilkat". You should name your app something else.)

For more information, see https://developer-sandbox.rabobank.nl/implementoauth2

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

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

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.OAuth2")
set oauth2 = CreateObject("Chilkat.OAuth2")

' This should be the port in the localhost callback URL for your app.  
' The callback URL would look like "http://localhost:3017/" if the port number is 3017.
oauth2.ListenPort = 3017

' IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
' IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
' IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.
' IMPORTANT: Don't forget to subscribe your Rabobank application to the OAuth 2.0 services in the Rabobank Online Developer Portal.

' See also https://developer.rabobank.nl/faq

oauth2.AuthorizationEndpoint = "https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/authorize"
oauth2.TokenEndpoint = "https://api-sandbox.rabobank.nl/openapi/sandbox/oauth2/token"

' Replace these with actual values.
oauth2.ClientId = "YOUR_APP_CLIENT_ID"
' This is your app password:
oauth2.ClientSecret = "YOUR_APP_CLIENT_SECRET"

oauth2.CodeChallenge = 0
' Provide a SPACE separated list of scopes, as defined in the Rabobank API documentation, 
' such as at https://developer-sandbox.rabobank.nl/reference/accounts-ais-sb/3-0-8

' Important: To get a refresh token in the final response, you have to ask for "offline_access" scope
oauth2.Scope = "ais.balances.read ais.transactions.read-90days ais.transactions.read-history"

' Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
url = oauth2.StartAuth()
If (oauth2.LastMethodSuccess <> 1) Then
    outFile.WriteLine(oauth2.LastErrorText)
    WScript.Quit
End If

' At this point, your application should load the URL in a browser.
' For example, 
' in C#: System.Diagnostics.Process.Start(url);
' in Java: Desktop.getDesktop().browse(new URI(url));
' in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
'              wsh.Run url
' in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
' in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
' The Microsoft account owner would interactively accept or deny the authorization request.

' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...

' Now wait for the authorization.
' We'll wait for a max of 30 seconds.
numMsWaited = 0
Do While (numMsWaited < 30000) And (oauth2.AuthFlowState < 3)
    oauth2.SleepMs 100
    numMsWaited = numMsWaited + 100
Loop

' If there was no response from the browser within 30 seconds, then 
' the AuthFlowState will be equal to 1 or 2.
' 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
' 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
' In that case, cancel the background task started in the call to StartAuth.
If (oauth2.AuthFlowState < 3) Then
    success = oauth2.Cancel()
    outFile.WriteLine("No response from the browser!")
    WScript.Quit
End If

' Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
' The possible AuthFlowState values are:
' 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
' 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
' 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
If (oauth2.AuthFlowState = 5) Then
    outFile.WriteLine("OAuth2 failed to complete.")
    outFile.WriteLine(oauth2.FailureInfo)
    WScript.Quit
End If

If (oauth2.AuthFlowState = 4) Then
    outFile.WriteLine("OAuth2 authorization was denied.")
    outFile.WriteLine(oauth2.AccessTokenResponse)
    WScript.Quit
End If

If (oauth2.AuthFlowState <> 3) Then
    outFile.WriteLine("Unexpected AuthFlowState:" & oauth2.AuthFlowState)
    WScript.Quit
End If

outFile.WriteLine("OAuth2 authorization granted!")
outFile.WriteLine("Access Token = " & oauth2.AccessToken)

' Get the full JSON response:
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json = CreateObject("Chilkat.JsonObject")
success = json.Load(oauth2.AccessTokenResponse)
json.EmitCompact = 0

' The JSON response looks like this:

' {
'   "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"
' }

outFile.WriteLine(json.Emit())

' Save the JSON to a file to be used in future requests.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.FileAccess")
set fac = CreateObject("Chilkat.FileAccess")
success = fac.WriteEntireTextFile("qa_data/tokens/rabobank.json",json.Emit(),"utf-8",0)

outFile.Close