private Task <OAuthLoginResult> FetchToken(string tokenUri)
{
var httpClient = new HttpClient(new HttpClientHandler(), disposeHandler: true);
return(httpClient.GetAsync(tokenUri)
.ContinueWith(async t =>
{
using (httpClient)
{
if (t.IsFaulted || t.IsCanceled)
{
return new OAuthLoginResult(OAuthLoginState.UnknownError, null);
}
var response = t.Result;
if (!response.IsSuccessStatusCode)
{
return new OAuthLoginResult(OAuthLoginState.UnknownError, null);
}
var responseBody = await response.Content.ReadAsStreamAsync();
if (responseBody == null)
{
return new OAuthLoginResult(OAuthLoginState.UnknownError, null);
}
using (var reader = new StreamReader(responseBody))
using (var jsonReader = new JsonTextReader(reader))
{
var json = JObject.Load(jsonReader);
var result = OAuthResponse.FromJson(json);
return new OAuthLoginResult(OAuthLoginState.Success, result);
}
}
})
.Unwrap());
}
public OAuthLoginResult(OAuthLoginState state,
OAuthResponse tokenResponse)
{
this.State = state;
this.TokenResponse = tokenResponse;
}