async Task<TokenInfo> IDeviceOAuth2Stepwise.WaitForUserConsent(AuthInfo info, CancellationToken cancelToken)
{
return await PollForUserAuth(info, cancelToken);
}
private void OnPromptUser(AuthInfo info)
{
Debug.WriteLine(info.UserCode);
var e = PromptUser;
if (e != null)
{
e.BeginInvoke(this, info, null, null);
}
}
/// <summary> /// Polls the service endpoint until the user gives authorization or the <see cref="AuthInfo.Expiration"/> passes /// </summary> /// <param name="info">The end point to authorize</param> /// <param name="cancelToken">A cancellation token</param> /// <returns>An auth token</returns> /// <exception cref="UnauthorizedAccessException">Thrown when the user denies access</exception> /// <exception cref="TimeoutException">Thrown when the user does not respond in the time alotted by the service</exception> /// <exception cref="DynamicRestClientResponseException">When there is an http failure</exception> async Task <TokenInfo> IDeviceOAuth2Stepwise.WaitForUserConsent(AuthInfo info, CancellationToken cancelToken) => await PollForUserAuth(info, cancelToken);
private async Task<TokenInfo> PollForUserAuth(AuthInfo authInfo, CancellationToken cancelToken)
{
if (authInfo == null) throw new ArgumentNullException("authInfo");
using (dynamic authEndPoint = new DynamicRestClient(_endPoint.AuthUri))
{
// here poll for success
while (DateTimeOffset.UtcNow < authInfo.Expiration)
{
await Task.Delay(authInfo.PollInterval * 1000);
// check the oauth token endpoint ot see if access has been authorized yet
using (HttpResponseMessage message = await authEndPoint(_endPoint.TokenPath).post(typeof(HttpResponseMessage), cancelToken, client_id: _clientId, client_secret: _clientSecret, code: authInfo.DeviceCode, type: "device_token", grant_type: "http://oauth.net/grant_type/device/1.0"))
{
// for some reason facebook returns 400 bad request while waiting for authorization from the user
if (message.StatusCode != HttpStatusCode.BadRequest)
{
message.EnsureSuccessStatusCode();
}
var tokenResponse = await message.Deserialize<dynamic>(new JsonSerializerSettings()) as IDictionary<string, object>;
if (tokenResponse.ContainsKey("access_token"))
{
return new TokenInfo()
{
Site = _endPoint.Name,
AccessToken = (string)tokenResponse["access_token"],
RefreshToken = tokenResponse.ContainsKey("refresh_token") ? (string)tokenResponse["refresh_token"] : null,
Expiry = tokenResponse.ContainsKey("expires_in") ? DateTime.UtcNow + TimeSpan.FromSeconds((long)tokenResponse["expires_in"]) : DateTime.MaxValue,
Scheme = _endPoint.Scheme
};
}
tokenResponse.ThrowIfError();
// if we made it this far it inidcates that the rest endpoint is still in a pending state, so go around again
}
OnWaitingForConfirmation((int)(authInfo.Expiration - DateTimeOffset.UtcNow).TotalSeconds);
}
throw new TimeoutException("Access timeout expired");
}
}
async Task <TokenInfo> IDeviceOAuth2Stepwise.WaitForUserConsent(AuthInfo info)
{
return(await PollForUserAuth(info, CancellationToken.None));
}