Oauth2 Implicit Flow with single-page-app refreshing access tokens

Question

I am using Thinktecture AuthorizationServer (AS) and it is working great.

I would like to write a native javascript single page app which can call a WebAPI directly, how

Answer 1

In Google o-Auth , the access token will only be valid for 1 hour, so you need to programmatically update your access token in each one hour, simple you can create web api to do so,you need to have a refresh token, and also that refresh token will not be expired , using c# code, I have done this.

 if (dateTimeDiff > 55)
            {
                var request = (HttpWebRequest)WebRequest.Create("https://www.googleapis.com/oauth2/v3/token");
                var postData = "refresh_token=your refresh token";
                postData += "&client_id=your client id";
                postData += "&client_secret=your client secrent";
                postData += "&grant_type=refresh_token";

                var data = Encoding.ASCII.GetBytes(postData);            
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;
                request.UseDefaultCredentials = true;

                using (var stream = request.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
                var response = (HttpWebResponse)request.GetResponse();
                string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();

            }

you need to save the last updated date time of the access token somewhere(say in database), so that , whenever you have to make a request , so you can subtract that with current date time , if it is more than 60 minutes , you need to call the webapi to get new token .