Is it possible to use AuthorizationCodeMvcApp for authorization in google contacts API access?

Question

I am currently working on a web app where I sync the user's google contact list.

Currently I am able to sync the calendar just fine. Unfortunately the same approach doesn't seem feasible in the case of contacts.

Below was my approach for Calendars v3.

public async Task<ActionResult> Index(CancellationToken cancellationToken)
        {
            var user = User.Identity.GetUserId();
            var result = await new AuthorizationCodeMvcApp(this, new AppFlowMetadata()).
              AuthorizeAsync(user, cancellationToken);

            if (result.Credential != null)
            {
                CalendarService service = new CalendarService(new BaseClientService.Initializer()
                {
                    HttpClientInitializer = result.Credential,
                    ApplicationName = "Calendar API Sample",
                });
                var list = service.CalendarList.List().Execute();

                var calendar = list.Items.ElementAt(0);
                var events = service.Events.List(calendar.Id).Execute();



                foreach (var e in events.Items)
                {
                    try { 
                    EventLoot.data.Entities.Event model = new EventLoot.data.Entities.Event();
                    model.User_id = User.Identity.GetUserId();
                    model.Venue = e.Location != null ? e.Location : "" ;
                    model.Name = e.Summary;
                    model.Date = DateTime.Today;
                    model.start_date = e.Start.DateTime;
                    model.end_date = e.End.DateTime;
                    model.start_time = e.Start.DateTime.Value.TimeOfDay;
                    model.end_time = e.End.DateTime.Value.TimeOfDay;

                    dbcontext.Events.Add(model);
                    dbcontext.SaveChanges();
                    }
                    catch (Exception a)
                    {
                        Console.Write(a);
                    }
                }
                list.ToString();

                return View("index");
            }

I like this approach since the DataStore handles ensuring that I have a refresh token. Can this approach be adapted for Google Contacts as well? If so how?

score 2 · Accepted Answer · edited May 23 '17 at 12:28

Unfortunately Google Contacts supports the old GData protocol and the API doesn't have an equivalent library in the new Google APIs client library for .NET.

But... I also have good news, take a look in this thread - How to create a ContactsService using Google Contact API v3 with OAuth v2 UserCredentials.
You can add a new scope for the contacts API, "https://www.google.com/m8/feeds/" besides the calendar scope, and after the user finishes authenticating, you can use tokens stored in the DataStore to work with the GData API for Contacts.

Is it possible to use AuthorizationCodeMvcApp for authorization in google contacts API access?

1 Answers1