private static void DownloadStringAsync2Internal(this WebClient request, Uri address, DownloadStringCompletedEventHandler2 callback, object userToken, int attempt)
{
if (attempt == 1)
{
request.DownloadStringCompleted += delegate(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error != null && attempt == 1)
{
try
{
WebException ex = (WebException)e.Error;
HttpWebResponse httpWebResponse = (HttpWebResponse)ex.Response;
if (httpWebResponse.StatusCode == HttpStatusCode.ProxyAuthenticationRequired)
{
request.Proxy = new WebProxy();
request.UseDefaultCredentials = true;
request.Proxy.Credentials = CredentialCache.DefaultCredentials;
request.DownloadStringAsync2Internal(address, callback, userToken, ++attempt);
return;
}
}
catch
{
}
}
CallState callState = e.UserState as CallState;
DownloadStringCompletedEventHandler2 downloadStringCompletedEventHandler = callState.Callback as DownloadStringCompletedEventHandler2;
DownloadStringCompletedEventArgs2 e2 = new DownloadStringCompletedEventArgs2(e.Result, e.Error, e.Cancelled, callState.Data);
downloadStringCompletedEventHandler(callState.Data, e2);
};
}
request.DownloadStringAsync(address, new CallState
{
Callback = callback,
Data = userToken
});
}
public static void DownloadStringAsync2(this WebClient request, Uri address, DownloadStringCompletedEventHandler2 callback)
{
request.DownloadStringAsync2(address, callback, null);
}
public static void DownloadStringAsync2(this WebClient request, Uri address, DownloadStringCompletedEventHandler2 callback, object userToken)
{
request.DownloadStringAsync2Internal(address, callback, userToken, 1);
}
