/// <summary>
/// Async HTTP Read Callback
/// IAsyncResult asyncResult (input) -> data necesary to access the webdonwload instance, because
/// This is a static method and has not the Webdownload instance
/// </summary>
private static void AsyncReadCallback(IAsyncResult asyncResult)
{
WebDownload webDL = (WebDownload)asyncResult.AsyncState;
Stream responseStream = webDL.responseStream;
try
{
int read = responseStream.EndRead(asyncResult);
if (read > 0)
{
webDL.ContentStream.Write(webDL.readBuffer, 0, read);
webDL.BytesProcessed += read;
webDL.OnProgressCallback(webDL.BytesProcessed, webDL.ContentLength);
IAsyncResult asynchronousResult = responseStream.BeginRead(webDL.readBuffer, 0, webDL.readBuffer.Length, new AsyncCallback(AsyncReadCallback), webDL);
return;
}
else
{
if (webDL.BytesProcessed <= 0)
{
Exception myException = new Exception("400 No tile");
webDL.SaveException(myException);
webDL.AsyncFinishDownload();
return;
}
webDL.SaveException(null);
webDL.AsyncFinishDownload();
}
}
catch (IOException ex)
{
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncReadCallback(): IOException: " + ex.Message.ToString() + webDL.BytesProcessed);
if (webDL.num_retry > 5)
{
webDL.SaveException(new Exception("Unable to connect to the remote server several Async Read tries have been broke"));
webDL.AsyncFinishDownload();
return;
}
webDL.num_retry++;
webDL.AsyncFinishPrepareRetry();
webDL.DownloadAsync();
}
catch (WebException e)
{
if (webDL.timedOut == false)
{
// request cancelled.
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncReadCallback(): WebException: " + e.Status.ToString());
webDL.SaveException(e);
webDL.AsyncFinishDownload();
//webDL.Cancel();
}
}
catch (NullReferenceException e)
{
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncReadCallback(): NullReferenceException: " + e.Message);
webDL.SaveException(e);
webDL.AsyncFinishDownload();
}
catch (Exception e)
{
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncReadCallback(): Exception: " + e.Message);
webDL.SaveException(e);
//Cancel();
webDL.AsyncFinishDownload();
}
}
/// <summary>
/// Async HTTP response Callback
/// IAsyncResult asyncResult (input) -> data necesary to access the webdonwload instance, because
/// This is a static method and has not the Webdownload instance
/// </summary>
private static void AsyncResponseCallback(IAsyncResult asyncResult)
{
WebDownload webDL = (WebDownload)asyncResult.AsyncState;
try
{
webDL.response = webDL.request.EndGetResponse(asyncResult) as HttpWebResponse;
// only if server responds 200 OK
if (webDL.response.StatusCode == HttpStatusCode.OK)
{
webDL.ContentType = webDL.response.ContentType;
webDL.ContentEncoding = webDL.response.ContentEncoding;
// Find the data size from the headers.
string strContentLength = webDL.response.Headers["Content-Length"];
if (strContentLength != null)
{
webDL.ContentLength = int.Parse(strContentLength, CultureInfo.InvariantCulture);
}
// If if (webDL.ContentLength <= 0) ?????
webDL.responseStream = webDL.response.GetResponseStream();
IAsyncResult result = webDL.responseStream.BeginRead(webDL.readBuffer, 0, webDL.readBuffer.Length, new AsyncCallback(AsyncReadCallback), webDL);
return;
}
else
{
Exception myException = new Exception(webDL.response.StatusCode.ToString());
webDL.SaveException(myException);
webDL.AsyncFinishDownload();
}
}
catch (WebException e)
{
if (webDL.timedOut == false)
{
// request cancelled.
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncResponseCallback(): WebException: " + e.Status.ToString());
webDL.SaveException(e);
webDL.AsyncFinishDownload();
//webDL.Cancel();
}
}
catch (ArgumentNullException e)
{
// request cancelled.
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncResponseCallback(): ArgumentNullException: " + e.Message);
webDL.SaveException(e);
webDL.AsyncFinishDownload();
}
catch (InvalidOperationException e)
{
// request cancelled.
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncResponseCallback(): InvalidOperationException: " + e.Message);
webDL.SaveException(e);
webDL.AsyncFinishDownload();
}
catch (ArgumentException e)
{
// request cancelled.
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncResponseCallback(): ArgumentException: " + e.Message);
webDL.SaveException(e);
webDL.AsyncFinishDownload();
}
catch (NullReferenceException e)
{
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncResponseCallback(): NullReferenceException: " + e.Message);
webDL.SaveException(e);
webDL.AsyncFinishDownload();
}
catch (Exception e)
{
Utility.Log.Write(Log.Levels.Debug, "NET", "AsyncResponseCallback(): Exception: " + e.Message);
webDL.SaveException(e);
//Cancel();
webDL.AsyncFinishDownload();
}
}
