/// <summary>
/// Query Google Async.
/// </summary>
/// <param name="request"></param>
/// <param name="timeout"></param>
/// <param name="token"></param>
/// <returns>Task[TResponse]</returns>
protected internal static Task <TResponse> QueryGoogleApiAsync(TRequest request, TimeSpan timeout, CancellationToken token = default(CancellationToken))
{
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
var uri = request.GetUri();
var webClient = new WebClientTimeout(timeout);
var taskCompletionSource = new TaskCompletionSource <TResponse>();
if (request is IJsonRequest)
{
webClient.Headers.Add(HttpRequestHeader.ContentType, "application/json");
var jsonSerializerSettings = new JsonSerializerSettings {
NullValueHandling = NullValueHandling.Ignore
};
var jsonString = JsonConvert.SerializeObject(request, jsonSerializerSettings);
webClient.UploadStringTaskAsync(uri, WebRequestMethods.Http.Post, jsonString)
.ContinueWith(x => GenericEngine <TRequest, TResponse> .JsonRequestAsync(x, taskCompletionSource), TaskContinuationOptions.ExecuteSynchronously);
return(taskCompletionSource.Task);
}
if (request is IQueryStringRequest)
{
webClient.DownloadDataTaskAsync(uri, timeout, token)
.ContinueWith(x => GenericEngine <TRequest, TResponse> .QuerystringRequestAsync(x, taskCompletionSource), TaskContinuationOptions.ExecuteSynchronously);
return(taskCompletionSource.Task);
}
throw new InvalidOperationException("Invalid Request. Request class missing Request interface implementation.");
}
