private static IEnumerable <Task> RequestAsyncTask(string url, object userState,
TaskCompletionSource <WebServiceResponse> tcs)
{
Logs.Message("WebService -> Creating web request " + url);
var response = new WebServiceResponse();
response.RequestUri = url;
response.UserState = userState;
var httpRequest = (HttpWebRequest)WebRequest.Create(url);
Logs.Message("WebService -> Getting web response...");
var httpTask = Task.Factory.FromAsync <WebResponse>
(httpRequest.BeginGetResponse, httpRequest.EndGetResponse, null);
yield return(httpTask);
try
{
// get web response
using (var httpResponse = (HttpWebResponse)httpTask.Result)
{
response = Update(response, httpResponse);
tcs.TrySetResult(response);
}
}
catch (Exception error)
{
response = Update(response, error);
tcs.TrySetResult(response);
}
}
private static WebServiceResponse Update(WebServiceResponse response, Exception ex)
{
Logs.Message("WebService -> Getting web response failed: " + ex.Message);
response.StatusCode = HttpStatusCode.NotAcceptable;
response.ErrorMessage = ex.Message;
response.ErrorStack = ex.Message + "\n" + ex.StackTrace;
response.ErrorOccured = true;
return(response);
}
public static void Request(string url, object userState = null,
Action <WebServiceResponse> callback = null)
{
Logs.Message("WebService -> Creating web request " + url + "...");
try
{
var httpRequest = (HttpWebRequest)WebRequest.Create(url);
Logs.Message("WebService -> Getting web response...");
var result = (IAsyncResult)httpRequest.BeginGetResponse(
new AsyncCallback(delegate(IAsyncResult tempResult)
{
try
{
var httpResponse = (HttpWebResponse)httpRequest.EndGetResponse(tempResult);
var response = new WebServiceResponse();
response.RequestUri = url;
response.UserState = userState;
response = Update(response, httpResponse);
if (callback != null)
{
callback(response);
}
}
catch (WebException e)
{
var response = new WebServiceResponse();
response.RequestUri = url;
response.UserState = userState;
response = Update(response, e);
if (callback != null)
{
callback(response);
}
}
}), null);
}
catch (Exception error)
{
var response = new WebServiceResponse();
response.RequestUri = url;
response.UserState = userState;
response = Update(response, error);
if (callback != null)
{
callback(response);
}
}
}
private static WebServiceResponse Update(
WebServiceResponse response, HttpWebResponse httpResponse)
{
Logs.Message("WebService -> Getting web response completed: " + httpResponse.StatusDescription);
response.Uri = httpResponse.ResponseUri;
response.Method = httpResponse.Method;
response.StatusCode = httpResponse.StatusCode;
response.StatusInfo = httpResponse.StatusDescription;
response.ResultType = httpResponse.ContentType;
response.ResultLength = httpResponse.ContentLength;
Logs.Message("WebService -> Getting web response stream");
response.ResultStream = httpResponse.GetResponseStream();
return(response);
}
