Xbase++

Get a Google Drive Access Token using a JSON Private Key

See more Google Drive Examples

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

LOCAL nSuccess
LOCAL oFac
LOCAL cJsonKey
LOCAL oGAuth
LOCAL oTlsSock

nSuccess := 0

//  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.
oFac := CreateObject("Chilkat.FileAccess")
cJsonKey := oFac:ReadEntireTextFile("qa_data/googleApi/chilkatcloud-b8826e030499.json", "utf-8")
IF (oFac:LastMethodSuccess != 1)
    ? oFac:LastErrorText
    oFac:destroy()
    RETURN
ENDIF

oGAuth := CreateObject("Chilkat.AuthGoogle")
oGAuth:JsonKey := cJsonKey

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

//  Request an access token that is valid for this many seconds.
oGAuth: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.)
oGAuth: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.
oTlsSock := CreateObject("Chilkat.Socket")
nSuccess := oTlsSock:Connect("www.googleapis.com", 443, 1, 5000)
IF (nSuccess != 1)
    ? oTlsSock:LastErrorText
    oFac:destroy()
    oGAuth:destroy()
    oTlsSock:destroy()
    RETURN
ENDIF

//  Send the request to obtain the access token.
nSuccess := oGAuth:ObtainAccessToken(oTlsSock)
IF (nSuccess != 1)
    ? oGAuth:LastErrorText
    oFac:destroy()
    oGAuth:destroy()
    oTlsSock:destroy()
    RETURN
ENDIF

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

oFac:destroy()
oGAuth:destroy()
oTlsSock:destroy()