Google Calendar V3 hangs when used outside local environment (asp.net)

[Hewbhurt Gabon]

Hello again Google Calendar API Team!

I am somewhat in panic mode right now. I only got month left and Google will be shutting down v2 again. I am stock to a similar situation to this post at stockoverflow. http://stackoverflow.com/questions/25914644/google-calendar-v3-hangs-when-used-outside-local-environment-asp-net

 I'm working on a wrapper for the .net version of the Google Calendar API. The authentication is rather simple and working fine locally (localhost:port).

            var gFolder = System.Web.HttpContext.Current.Server.MapPath("/App_Data/MyGoogleStorage");
            UserCredential credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
                new ClientSecrets
                {
                    ClientId = "xxxxxxxxx.apps.googleusercontent.com",
                    ClientSecret = "xxxxxxxxxxxx0Kq9gwLdQwB1",
                },
                new[] { CalendarService.Scope.Calendar },
                "user",
                CancellationToken.None,
                new FileDataStore(gFolder)).Result;
            // Create the service.
            var service = new CalendarService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential
            });  

The issue is, though, when the same code is deployed to production (secrets changed, of course), the application just hangs whenever I try to access the data. There's no exception, no error code, it just keeps loading forever.

Any advice?

[Lucia Fedorova]

Hi Hewbhurt,

is the storage path accessible after deployment?

[Hewbhurt Gabon]

Hello ms. Lucia! First of all, I would like to thank you for replying to my post. I am happy that somehow, someone from Google Calendar API Team is showing concern to desperate v1/v2 developer like us. Ms Lucia, I have already solve or humbly got a solution for the above issue. I have shared it at stockoverflow. http://stackoverflow.com/a/27073729/4280827

The code below works for me. It is my own revision of Google API Simple Task ASP.NET sample.

Add these usings...

using System.IO;

using System.Threading;

using Google.Apis.Calendar.v3;

using Google.Apis.Calendar.v3.Data;

using Google.Apis.Auth.OAuth2;

using Google.Apis.Auth.OAuth2.Flows;

using Google.Apis.Auth.OAuth2.Web;

using Google.Apis.Services;

using Google.Apis.Util.Store;

And these...

CalendarService service;
static string gFolder = System.Web.HttpContext.Current.Server.MapPath("/App_Data/MyGoogleStorage");


protected void Page_Load(object sender, EventArgs e)
{
    IAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow(
        new GoogleAuthorizationCodeFlow.Initializer
        {
            ClientSecrets = GetClientConfiguration().Secrets,
            DataStore = new FileDataStore(gFolder),
            Scopes = new[] { CalendarService.Scope.Calendar }
        });

    var uri = Request.Url.ToString();
    var code = Request["code"];
    if (code != null)
    {
        var token = flow.ExchangeCodeForTokenAsync(UserId, code,
            uri.Substring(0, uri.IndexOf("?")), CancellationToken.None).Result;

        // Extract the right state.
        var oauthState = AuthWebUtility.ExtracRedirectFromState(
            flow.DataStore, UserId, Request["state"]).Result;
        Response.Redirect(oauthState);
    }
    else
    {
        var result = new AuthorizationCodeWebApp(flow, uri, uri).AuthorizeAsync(UserId,
            CancellationToken.None).Result;
        if (result.RedirectUri != null)
        {
            // Redirect the user to the authorization server.
            Response.Redirect(result.RedirectUri);
        }
        else
        {
            // The data store contains the user credential, so the user has been already authenticated.
            service = new CalendarService(new BaseClientService.Initializer
            {
                ApplicationName = "Calendar API Sample",
                HttpClientInitializer = result.Credential
            });
        }
    }
}


public static GoogleClientSecrets GetClientConfiguration()
{
    using (var stream = new FileStream(gFolder + @"\client_secrets.json", FileMode.Open, FileAccess.Read))
    {
        return GoogleClientSecrets.Load(stream);
    }
}

I know, a lot of us here is badly needing for this working sample. I hope this helps.