AutoIt

Get XOAUTH2 Access Token from Google OAuth 2.0 Authorization Server

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Obtains an OAUTH2 access token from the Google OAuth 2.0 Authorization Server. This is for Server to server applications using Google API's that need an access token. See https://developers.google.com/accounts/docs/OAuth2ServiceAccount AutoIt

Local $bSuccess = False

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

$oHttp = ObjCreate("Chilkat.Http")

; --------------------------------------------------------------------------------
; For a step-by-step guide for setting up your Google Workspace service account,
; see Setup Google Workspace Account for Sending SMTP GMail from a Service Account
; --------------------------------------------------------------------------------
; Begin by loading your Google service account key (.p12)
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadPfxFile("c:/someDirectory/keys/chilkat25-cbd7b42afbd8.p12","notasecret")
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

; The ISS is your service account email address ending in gserviceaccount.com.
Local $sIss = "chilkatsvc@chilkat25.iam.gserviceaccount.com"

; The scope is always the following string:
Local $scope = "https://mail.google.com/"

; The sub is your company email address
Local $sOauth_sub = "bob@yourcompany.com"

; The access token is valid for this number of seconds.
Local $iNumSec = 3600

Local $sAccessToken = $oHttp.G_SvcOauthAccessToken($sIss,$scope,$sOauth_sub,$iNumSec,$oCert)
If ($oHttp.LastMethodSuccess <> True) Then
    ConsoleWrite($oHttp.LastErrorText & @CRLF)
    Exit
Else
    ConsoleWrite("access token: " & $sAccessToken & @CRLF)
EndIf

; The access token allows us to send unlimited emails while it's valid. Once it expires, we must obtain and use a new one.