(Lianja) Get Google API Access Token using P12 Service Account Key

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

Chilkat Lianja Extension Download Chilkat Lianja Extension

// 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("CkPfx")
llSuccess = loPfx.LoadPfxFile("qa_data/pfx/chilkat25-cbd7b42afbd8.p12","notasecret")
if (llSuccess <> .T.) then
    ? loPfx.LastErrorText
    release loPfx
    return
endif

loGAuth = createobject("CkAuthGoogle")
llSuccess = 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("CkSocket")
llSuccess = loTlsSock.Connect("www.googleapis.com",443,.T.,5000)
if (llSuccess <> .T.) then
    ? loTlsSock.LastErrorText
    release loPfx
    release loGAuth
    release loTlsSock
    return
endif

// Send the request to obtain the access token.
llSuccess = loGAuth.ObtainAccessToken(loTlsSock)
if (llSuccess <> .T.) then
    ? loGAuth.LastErrorText
    release loPfx
    release loGAuth
    release loTlsSock
    return
endif

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


release loPfx
release loGAuth
release loTlsSock