(VBScript) GeoOp Exchange Refresh Token for New Access Token

Demonstrates how to use the /oauth2/token endpoint to exchange it for a new access token once the current access token has expired.

Note: This example requires Chilkat v9.5.0.65 or greater.

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

' This example also assumes that OAuth2 access and refresh tokens were previously fetched.
' and saved in a JSON file.  

' First get our previously obtained refresh token.
' { .... "refresh_token":"e6dqdG....mzjpT04w==", .... }
' 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/geoop.json")

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

' Connect to GeoOp...
bAutoReconnect = 1
success = rest.Connect("login.geoop.com",443,1,bAutoReconnect)
If (success <> 1) Then
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

' Set the X-Version header.
success = rest.AddHeader("X-Version","1.0")

' Provide the required form params to get the new access token
outFile.WriteLine("refresh_token = " & jsonToken.StringOf("refresh_token"))
success = rest.AddQueryParam("refresh_token",jsonToken.StringOf("refresh_token"))
success = rest.AddQueryParam("grant_type","refresh_token")
success = rest.AddQueryParam("client_id","GEOOP-CLIENT-ID")
success = rest.AddQueryParam("client_secret","GEOOP-CLIENT-SECRET")

responseBody = rest.FullRequestFormUrlEncoded("POST","/oauth2/token")
If (rest.LastMethodSuccess <> 1) Then
    outFile.WriteLine(rest.LastErrorText)
    WScript.Quit
End If

' If the response status code did not indicate success, then see what happened..
If (rest.ResponseStatusCode <> 200) Then
    outFile.WriteLine("Request Header: ")
    outFile.WriteLine(rest.LastRequestHeader)
    outFile.WriteLine("----")
    outFile.WriteLine("Response StatusCode = " & rest.ResponseStatusCode)
    outFile.WriteLine("Response StatusLine: " & rest.ResponseStatusText)
    outFile.WriteLine("Response Header:")
    outFile.WriteLine(rest.ResponseHeader)
    outFile.WriteLine(responseBody)
    WScript.Quit
End If

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json = CreateObject("Chilkat.JsonObject")
json.EmitCompact = 0
success = json.Load(responseBody)

' Show the full JSON response.  It should contain the new access token...
outFile.WriteLine(json.Emit())

outFile.Close