public void ReceiveAccessToken(string code)
{
try
{
Logger.Info("Receiving access token");
// https://developers.google.com/identity/protocols/OAuth2InstalledApp
var redirectURI = "urn:ietf:wg:oauth:2.0:oob";
code = WebUtility.UrlEncode(code);
var url = "https://www.googleapis.com/oauth2/v4/token";
string postData = $"code={code}";
postData += $"&client_id={AuthInfo.client_id}";
postData += $"&client_secret={AuthInfo.client_secret}";
postData += $"&redirect_uri={redirectURI}";
postData += $"&grant_type=authorization_code";
AccessToken = GAPICommunication.SendRequest <GAPIAccessToken>(url, postData, "POST", null);
AccessToken.expires_at = DateTime.Now.AddSeconds(Convert.ToDouble(AccessToken.expires_in));
AccessToken.SaveToFile("token.json");
}
catch (Exception ex)
{
Logger.Error(ex);
throw;
}
}
public void Connect()
{
try
{
var tokenPath = $"{GAPIBaseObject.AppDataDir}token.json";
if (File.Exists(tokenPath))
{
AccessToken = GAPIBaseObject.LoadFromFile <GAPIAccessToken>("token.json");
if (string.IsNullOrEmpty(AccessToken.refresh_token))
{
Logger.Info("Empty refresh token");
Authenticate();
}
else
{
if (AccessToken.expires_at < DateTime.Now)
{
Logger.Info($"Access token expired at [{AccessToken.expires_at.ToString()}]");
RefreshAccessToken();
}
}
}
else
{
Logger.Info("Access token does not exist");
Authenticate();
}
Logger.Debug($"Access token will expire at [{AccessToken.expires_at.ToString()}]");
}
catch (Exception ex)
{
Logger.Error(ex);
throw;
}
}