(VBScript) Get a Google Drive Access Token using a JSON Private Key

Demonstrates how to get a Google Drive API access token using a JSON service account private key.

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.

' First load the JSON key into a string.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.FileAccess")
set fac = CreateObject("Chilkat.FileAccess")
jsonKey = fac.ReadEntireTextFile("qa_data/googleApi/chilkatcloud-b8826e030499.json","utf-8")
If (fac.LastMethodSuccess <> 1) Then
    outFile.WriteLine(fac.LastErrorText)
    WScript.Quit
End If

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.AuthGoogle")
set gAuth = CreateObject("Chilkat.AuthGoogle")
gAuth.JsonKey = jsonKey

' Choose a scope.
gAuth.Scope = "https://www.googleapis.com/auth/drive"

' Request an access token that is valid for this many seconds.
gAuth.ExpireNumSeconds = 3600

' If the application is requesting delegated access:
' The email address of the user for which the application is requesting delegated access,
' then set the email address here. (Otherwise leave it empty.)
gAuth.SubEmailAddress = ""

' Connect to www.googleapis.com using TLS (TLS 1.2 is the default.)
' The Chilkat socket object is used so that the connection can be established
' through proxies or an SSH tunnel if desired.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Socket")
set tlsSock = CreateObject("Chilkat.Socket")
success = tlsSock.Connect("www.googleapis.com",443,1,5000)
If (success <> 1) Then
    outFile.WriteLine(tlsSock.LastErrorText)
    WScript.Quit
End If

' Send the request to obtain the access token.
success = gAuth.ObtainAccessToken(tlsSock)
If (success <> 1) Then
    outFile.WriteLine(gAuth.LastErrorText)
    WScript.Quit
End If

' Examine the access token:
outFile.WriteLine("Access Token: " & gAuth.AccessToken)

outFile.Close