(VBScript) Okta: Refresh Access Token with the Auth Code Flow

Demonstrates how to refresh a token that was obtained using the authorization code flow.

For more information, see https://developer.okta.com/docs/guides/implement-auth-code-pkce/use-flow/

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.

' See Get Okta Access Token using Authorization Code Flow with PKCE 
' for sample code showing how to obtain an Okta access token using the authorization code flow for native apps (with PKCE).

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set jsonToken = CreateObject("Chilkat.JsonObject")
success = jsonToken.LoadFile("qa_data/tokens/okta.json")
If (success <> 1) Then
    outFile.WriteLine("Failed to load myob.json")
    WScript.Quit
End If

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

oauth2.TokenEndpoint = "https://{yourOktaDomain}/oauth2/default/v1/token"

' Replace these with actual values.
oauth2.ClientId = "OKTA_CLIENT_ID"
oauth2.ClientSecret = "OKTA_CLIENT_SECRET"

' Get the "refresh_token"
oauth2.RefreshToken = jsonToken.StringOf("refresh_token")

' Send the HTTP POST to refresh the access token..
oauth2.VerboseLogging = 1
success = oauth2.RefreshAccessToken()
If (success <> 1) Then
    outFile.WriteLine(oauth2.LastErrorText)
    WScript.Quit
End If

' Load the access token response into the json object 
success = jsonToken.Load(oauth2.AccessTokenResponse)

' Save the new JSON access token response to a file.
' The access + refresh tokens contained in this JSON will be needed for the next refresh.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder")
set sbJson = CreateObject("Chilkat.StringBuilder")
jsonToken.EmitCompact = 0
success = jsonToken.EmitSb(sbJson)
success = sbJson.WriteFile("qa_data/tokens/okta.json","utf-8",0)

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

outFile.Close