C# question: trying to authenticate using a client_secrets.json file

[Dave S]

using System;

using System.IO;

using System.Collections.Generic;

using System.Collections;

using System.Linq;

using System.Text;

using System.Diagnostics;

//For use in class CalandarMainV3  :  An entirely new class needed to 

using System.Threading;

using System.Threading.Tasks;

using Google;

using Google.Apis.Auth.OAuth2;

using Google.Apis.Calendar.v3;

using Google.Apis.Calendar.v3.Data;

using Google.Apis.Services;

using Google.Apis.Util.Store;

namespace RepBusGoogleCalendarV3

{

    public class CalandarMainV3

    {

        const String ClientSecretsFile = "C:\\Users\\user1\\Documents\\Visual Studio 2010\\Projects\\Programming\\Projects\\Google Ops\\client_secrets.json";

        bool m_Init;

        public CalandarMainV3()

        {

            Console.WriteLine("Calling: AuthGoogleDataInterface()");

            m_Init = AuthGoogleDataInterface();

        }

        private bool AuthGoogleDataInterface()

        {

            bool b_success;

            try

            {

                Console.WriteLine("New User Credential");

                // New User Credential

                UserCredential credential;

                using (var stream = new FileStream(ClientSecretsFile, FileMode.Open, FileAccess.Read))

                {

                    credential = GoogleWebAuthorizationBroker.AuthorizeAsync(

                        GoogleClientSecrets.Load(stream).Secrets,

                        new[] { CalendarService.Scope.Calendar },

                        "user", CancellationToken.None,

                        null).Result;

                        //new FileDataStore("My.cal")).Result;

                }

                Console.WriteLine("New Service");

                // Create the service.

                var service = new CalendarService(new BaseClientService.Initializer

                {

                    HttpClientInitializer = credential,

                    ApplicationName = "My Calendar API",

                });

                

                Console.WriteLine("AuthGoogleDataInterface: Success");

                b_success = true;

            }

            catch (Exception e)

            {

                string cs_err;

                cs_err = e.Message;

                Console.WriteLine(cs_err);

                Console.WriteLine(e.Source);

                Console.WriteLine("AuthGoogleDataInterface: Fail");

                b_success = false;

                throw;

            }

            return b_success;

        }

    }

}

The code above complies correctly and runs, but I am now having a problem with the CLIENT SECRETS file.

Contents of the client_secrets.json file.

{"installed":{"auth_uri":"https://accounts.google.com/o/oauth2/auth","client_secret":"xxxxxxxxxxxxxxxxxxxxxxxx","token_uri":"https://accounts.google.com/o/oauth2/token","client_email":"","redirect_uris":["urn:ietf:wg:oauth:2.0:xxx","xxx"],"client_x509_cert_url":"","client_id":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs"}}

NOTE: I am testing this class in a simple console application.

When I run the program, it loads a web page with the following contents:

401. That’s an error.

Error: invalid_client

no application name

Request Details

scope=https://www.googleapis.com/auth/calendar

response_type=code

redirect_uri=http://localhost:00000/authorize/

access_type=offline

client_id=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com

That’s all we know.

What am I doing wrong?

Microsoft Visual Studio 2010

Version 10.0.40219.1 SP1Rel

Microsoft .NET Framework

Version 4.5.50938 SP1Rel

Microsoft Visual C# 2010

Microsoft Visual C# 2010

Thanks!

 - Dave

[Dave S]

http://stackoverflow.com/questions/18677244/error-invalid-client-no-application-name

At the link above I discovered that the error was being caused because I had not set up "Project Name" in my Google APIs Dashboard.

After setting it up the code ran with out error.  The first time I ran it a web page was displayed asking me to ok this device to use the service.