private async Task <string> RefreshAccessToken()
{
if (!configHandler.HasYoutubeRefreshToken)
{
return("");
}
string refreshToken = configHandler.Config.YoutubeRefreshToken;
string tokenRequestUrl = $"{tokenEndpoint}?refresh_token={refreshToken}&client_id={clientId}&client_secret={clientSecret}&grant_type=refresh_token";
HttpWebRequest tokenRequest = (HttpWebRequest)WebRequest.Create(tokenRequestUrl);
tokenRequest.Method = "POST";
tokenRequest.ContentType = "application/x-www-form-urlencoded";
tokenRequest.Accept = "Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
byte[] byteVersion = Encoding.ASCII.GetBytes(tokenRequestUrl);
tokenRequest.ContentLength = byteVersion.Length;
using (System.IO.Stream stream = tokenRequest.GetRequestStream())
{
await stream.WriteAsync(byteVersion, 0, byteVersion.Length);
}
WebResponse tokenResponse = await tokenRequest.GetResponseAsync();
using (StreamReader reader = new StreamReader(tokenResponse.GetResponseStream()))
{
string responseText = await reader.ReadToEndAsync();
Dictionary <string, string> tokenEndpointDecoded = JsonConvert.DeserializeObject <Dictionary <string, string> >(responseText);
string accessToken = tokenEndpointDecoded["access_token"];
configHandler.SetYoutubeAccessToken(accessToken);
return(accessToken);
}
}
