(Visual FoxPro) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loPfx
LOCAL lnSuccess
LOCAL loGAuth
LOCAL loTlsSock

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

* First load the PKCS12 (.p12 / .pfx) into a PFX object.
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Pfx')
loPfx = CreateObject('Chilkat.Pfx')
lnSuccess = loPfx.LoadPfxFile("qa_data/googleSvcAccountKeys/ChilkatCloud-6ba1b17d6d16.p12","notasecret")
IF (lnSuccess <> 1) THEN
    ? loPfx.LastErrorText
    RELEASE loPfx
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.AuthGoogle')
loGAuth = CreateObject('Chilkat.AuthGoogle')
lnSuccess = loGAuth.SetP12(loPfx)

* Set the client email address.
loGAuth.EmailAddress = "pip-563@chilkatcloud.iam.gserviceaccount.com"

* Choose a scope.
loGAuth.Scope = "https://www.googleapis.com/auth/cloud-platform"

* Request an access token that is valid for this many seconds.
loGAuth.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.)
loGAuth.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')
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