Visual FoxPro

Get Google API Access Token using P12 Service Account Key

See more Google APIs Examples

Demonstrates how to get a Google API access token using a P12 service account key. Visual FoxPro

LOCAL lnSuccess
LOCAL loPfx
LOCAL loGAuth
LOCAL lcIss
LOCAL lcScope
LOCAL lcOauth_sub
LOCAL lnNumSec
LOCAL loTlsSock

lnSuccess = 0

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

* --------------------------------------------------------------------------------
* 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
* --------------------------------------------------------------------------------

* First load the PKCS12 (.p12 / .pfx) into a PFX object.
loPfx = CreateObject('Chilkat.Pfx')
lnSuccess = loPfx.LoadPfxFile("qa_data/pfx/chilkat25-cbd7b42afbd8.p12","notasecret")
IF (lnSuccess <> 1) THEN
    ? loPfx.LastErrorText
    RELEASE loPfx
    CANCEL
ENDIF

loGAuth = CreateObject('Chilkat.AuthGoogle')
lnSuccess = loGAuth.SetP12(loPfx)

* The ISS is your service account email address ending in gserviceaccount.com.
lcIss = "chilkatsvc@chilkat25.iam.gserviceaccount.com"

* The scope is always the following string:
lcScope = "https://mail.google.com/"

* The sub is your company email address
lcOauth_sub = "info@chilkat.xyz"

* The access token is valid for this number of seconds.
lnNumSec = 3600

loGAuth.EmailAddress = lcIss
loGAuth.Scope = lcScope
loGAuth.ExpireNumSeconds = lnNumSec
loGAuth.SubEmailAddress = lcOauth_sub

* Connect to www.googleapis.com
loTlsSock = CreateObject('Chilkat.Socket')
lnSuccess = loTlsSock.Connect("www.googleapis.com",443,1,5000)
IF (lnSuccess <> 1) THEN
    ? loTlsSock.LastErrorText
    RELEASE loPfx
    RELEASE loGAuth
    RELEASE loTlsSock
    CANCEL
ENDIF

* Send the request to obtain the access token.
lnSuccess = loGAuth.ObtainAccessToken(loTlsSock)
IF (lnSuccess <> 1) THEN
    ? loGAuth.LastErrorText
    RELEASE loPfx
    RELEASE loGAuth
    RELEASE loTlsSock
    CANCEL
ENDIF

* Examine the access token:
? "Access Token: " + loGAuth.AccessToken

RELEASE loPfx
RELEASE loGAuth
RELEASE loTlsSock