B4X

Get Access Token for Google Tasks using Service Account JSON Key

See more Google Tasks Examples

Demonstrates how to get an access token for the Google Tasks API using a Service Account JSON key. B4X

Dim success As Boolean = False

'  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.
Dim fac As ChilkatFileAccess
fac.Initialize
Dim jsonKey As String = fac.ReadEntireTextFile("qa_data/googleSvcAccountKeys/ChilkatCloud-48f7737c7505.json", "utf-8")
If fac.LastMethodSuccess <> True Then
    Log(fac.LastErrorText)
    Return
End If


'  A JSON private key should look like this:

'  {
'    "type": "service_account",
'    "project_id": "chilkatcloud",
'    "private_key_id": "48f7737c7505bb88eee6a20d09993e10605d466e",
'    "private_key": "-----BEGIN PRIVATE KEY----- ... -----END PRIVATE KEY-----\n",
'    "client_email": "pip-564@chilkatcloud.iam.gserviceaccount.com",
'    "client_id": "109982228323456925225",
'    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
'    "token_uri": "https://oauth2.googleapis.com/token",
'    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
'    "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/pip-564%40chilkatcloud.iam.gserviceaccount.com"
'  }

Dim gAuth As ChilkatAuthGoogle
gAuth.Initialize("gAuth")
gAuth.JsonKey = jsonKey

'  Choose the scope for read/write access.
gAuth.Scope = "https://www.googleapis.com/auth/tasks"

'  Request an access token that is valid for this many seconds.
gAuth.ExpireNumSeconds = 3600

gAuth.SubEmailAddress = ""

'  Connect to www.googleapis.com using TLS
Dim tlsSock As ChilkatSocket
tlsSock.Initialize("tlsSock")
success = tlsSock.Connect("www.googleapis.com", 443, True, 5000)
If success <> True Then
    Log(tlsSock.LastErrorText)
    Return
End If


'  Send the request to obtain the access token.
success = gAuth.ObtainAccessToken(tlsSock)
If success <> True Then
    Log(gAuth.LastErrorText)
    Return
End If


'  Examine the access token:
Log("Access Token: " & gAuth.AccessToken)

'  Save our access token to a file.
success = fac.WriteEntireTextFile("qa_data/tokens/googleTasks.txt", gAuth.AccessToken, "utf-8", False)