Configure Google Service Account Authentication for REST

See more REST Examples

Demonstrates Rest.SetAuthGoogle, which associates an AuthGoogle provider so Chilkat supplies a Google OAuth 2.0 bearer token on each request. The provider is configured with a service account JSON key and the required OAuth scope.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

LOCAL nSuccess
LOCAL oRest
LOCAL nBTls
LOCAL nBAutoReconnect
LOCAL oGAuth
LOCAL oSbJsonKey
LOCAL nBLoaded
LOCAL cJsonKey
LOCAL cResponseText

nSuccess := 0

oRest := CreateObject("Chilkat.Rest")
nBTls := 1
nBAutoReconnect := 1
nSuccess := oRest:Connect("example.com", 443, nBTls, nBAutoReconnect)
IF (nSuccess == 0)
    ? oRest:LastErrorText
    oRest:destroy()
    RETURN
ENDIF

//  Configure Google service-account authentication.  Load the service account JSON key and set the
//  required OAuth scope(s).
oGAuth := CreateObject("Chilkat.AuthGoogle")

oSbJsonKey := CreateObject("Chilkat.StringBuilder")
nBLoaded := oSbJsonKey:LoadFile("qa_data/service_account.json")
IF (nBLoaded != 1)
    ? "Failed to load the service account JSON key."
    oRest:destroy()
    oGAuth:destroy()
    oSbJsonKey:destroy()
    RETURN
ENDIF

cJsonKey := oSbJsonKey:GetAsString()
IF (oSbJsonKey:LastMethodSuccess == 0)
    ? oSbJsonKey:LastErrorText
    oRest:destroy()
    oGAuth:destroy()
    oSbJsonKey:destroy()
    RETURN
ENDIF

oGAuth:JsonKey := cJsonKey

//  A space-delimited list of the requested permissions.
oGAuth:Scope := "https://www.googleapis.com/auth/cloud-platform"

//  Associate the provider so Chilkat supplies a Google bearer token on each request.
nSuccess := oRest:SetAuthGoogle(oGAuth)
IF (nSuccess == 0)
    ? oRest:LastErrorText
    oRest:destroy()
    oGAuth:destroy()
    oSbJsonKey:destroy()
    RETURN
ENDIF

cResponseText := oRest:FullRequestNoBody("GET", "/storage/v1/b?project=my-project")
IF (oRest:LastMethodSuccess == 0)
    ? oRest:LastErrorText
    oRest:destroy()
    oGAuth:destroy()
    oSbJsonKey:destroy()
    RETURN
ENDIF

? cResponseText

oRest:destroy()
oGAuth:destroy()
oSbJsonKey:destroy()