private void PreparePostIfNecessary(string postData, HttpPostVerb postVerb, HttpWebRequest webRequest)
{
//if(!string.IsNullOrWhiteSpace(postData))
if (postVerb != HttpPostVerb.NON_POST__GET)
{
webRequest.Method = postVerb.ToString();
webRequest.ContentType = "application/json; charset=utf-8";
var ar = webRequest.BeginGetRequestStream(result => { }, null);
using (var writer = new StreamWriter(webRequest.EndGetRequestStream(ar)))
{
writer.Write(postData);
}
}
}
/// <typeparam name="T">A visszatérési érték típusa</typeparam>
/// <param name="todoWithResponse">A meghívott fv visszatérési értékét kapja paraméterül</param>
/// <param name="todoWithWebException">Ha WebException keletkezik, ebben lekezelhető</param>
/// <param name="todoAfterResponseReceived">Visszatérési érték nélküli fv-hívásoknál ez hívódik meg a Response megkérkezését követően (ha nincs WebException)</param>
/// <param name="existT">Van-e visszatérési érték</param>
private void GetAsyncDoWork <T>(string requestUrl, string postData, HttpPostVerb postVerb,
Action <T> todoWithResponse, Action <WebException> todoWithWebException,
Action todoAfterResponseReceived, bool existT)
{
var webRequest = WebRequest.CreateHttp(requestUrl);
webRequest.Headers[HttpRequestHeader.CacheControl] = "no-cache";
webRequest.Headers[HttpRequestHeader.IfModifiedSince] = DateTime.UtcNow.ToString();
SetRequestCookies(webRequest);
PreparePostIfNecessary(postData, postVerb, webRequest);
webRequest.BeginGetResponse(
ar =>
{
try
{
using (var response = (HttpWebResponse)webRequest.EndGetResponse(ar))
{
GetResponseCookies(response);
if (existT)
{
string responseObjectText;
using (var streamReader = new StreamReader(response.GetResponseStream()))
{
responseObjectText = streamReader.ReadToEnd();
}
var result = JsonConvert.DeserializeObject <T>(responseObjectText);
if (todoWithResponse != null)
{
todoWithResponse(result);
}
}
if (todoAfterResponseReceived != null)
{
todoAfterResponseReceived();
}
}
}
catch (WebException we)
{
bool handled = false;
var httpWebResponse = we.Response as HttpWebResponse;
if (httpWebResponse != null)
{
var isForbidden = httpWebResponse.StatusCode == HttpStatusCode.Forbidden;
var isUnauthorized = httpWebResponse.StatusCode == HttpStatusCode.Unauthorized;
//if(!UserData.IsAuthenticated && (isForbidden || isUnauthorized))
if (isForbidden || isUnauthorized)
{
Deployment.Current.Dispatcher.BeginInvoke(
() =>
{
var frame = (PhoneApplicationFrame)Application.Current.RootVisual;
frame.Navigate(new Uri("/Login.xaml", UriKind.Relative));
});
handled = true;
}
}
//TODO this way there will be a 'no connection' error msg even if we are just redircted to the login page
//(if changing, do sync with the Android version)
if (todoWithWebException != null && !handled)
{
todoWithWebException(we);
}
else
{
ShowDefaultErrorMsg();
}
}
catch (Exception e)
{
//todo error handling
}
}, null);
}
