Go

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. Go

    success := 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.
    fac := chilkat.NewFileAccess()
    jsonKey := fac.ReadEntireTextFile("qa_data/googleSvcAccountKeys/ChilkatCloud-48f7737c7505.json","utf-8")
    if fac.LastMethodSuccess() != true {
        fmt.Println(fac.LastErrorText())
        fac.DisposeFileAccess()
        return
    }

    // 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"
    // }

    gAuth := chilkat.NewAuthGoogle()
    gAuth.SetJsonKey(*jsonKey)

    // Choose the scope for read/write access.
    gAuth.SetScope("https://www.googleapis.com/auth/tasks")

    // Request an access token that is valid for this many seconds.
    gAuth.SetExpireNumSeconds(3600)

    gAuth.SetSubEmailAddress("")

    // Connect to www.googleapis.com using TLS
    tlsSock := chilkat.NewSocket()
    success = tlsSock.Connect("www.googleapis.com",443,true,5000)
    if success != true {
        fmt.Println(tlsSock.LastErrorText())
        fac.DisposeFileAccess()
        gAuth.DisposeAuthGoogle()
        tlsSock.DisposeSocket()
        return
    }

    // Send the request to obtain the access token.
    success = gAuth.ObtainAccessToken(tlsSock)
    if success != true {
        fmt.Println(gAuth.LastErrorText())
        fac.DisposeFileAccess()
        gAuth.DisposeAuthGoogle()
        tlsSock.DisposeSocket()
        return
    }

    // Examine the access token:
    fmt.Println("Access Token: ", gAuth.AccessToken())

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

    fac.DisposeFileAccess()
    gAuth.DisposeAuthGoogle()
    tlsSock.DisposeSocket()