/// <summary>
/// Main callback invoked in response to the Stream.BeginRead method, when we have some data.
/// </summary>
private void ReadCallback(IAsyncResult asyncResult)
{
Network.WebDownload.State requestState = ((Network.WebDownload.State)(asyncResult.AsyncState));
try {
Stream responseStream = requestState.streamResponse;
// Get results of read operation
int bytesRead = responseStream.EndRead(asyncResult);
// Got some data, need to read more
if (bytesRead > 0)
{
// Save Data
requestState.downloadDest.Write(requestState.bufferRead, 0, bytesRead);
// Report some progress, including total # bytes read, % complete, and transfer rate
requestState.bytesRead += bytesRead;
double percentComplete = ((double)requestState.bytesRead / (double)requestState.totalBytes) * 100.0f;
//Callback to GUI to update progress
if (requestState.progCB != null)
{
requestState.progCB(percentComplete);
}
// Kick off another read
IAsyncResult ar = responseStream.BeginRead(requestState.bufferRead, 0, requestState.bufferRead.Length, new AsyncCallback(ReadCallback), requestState);
return;
}
// EndRead returned 0, so no more data to be read
else
{
responseStream.Close();
requestState.response.Close();
requestState.downloadDest.Flush();
requestState.downloadDest.Close();
//Callback to GUI to report download has completed
if (requestState.doneCB != null)
{
requestState.doneCB();
}
}
}
catch (PluginAlreadyLoadedException) {
Logger.ReportWarning("Attempting to install a plugin that is already loaded: " + requestState.fileURI);
}
catch (WebException ex) {
//Callback to GUI to report an error has occured.
if (requestState.errorCB != null)
{
requestState.errorCB(ex);
}
}
}
/// <summary>
/// Main response callback, invoked once we have first Response packet from
/// server. This is where we initiate the actual file transfer, reading from
/// a stream.
/// </summary>
/// <param name="asyncResult"></param>
private void ResponseCallback(IAsyncResult asyncResult)
{
Network.WebDownload.State requestState = ((Network.WebDownload.State)(asyncResult.AsyncState));
try {
WebRequest req = requestState.request;
// HTTP
if (requestState.fileURI.Scheme == Uri.UriSchemeHttp)
{
HttpWebResponse resp = ((HttpWebResponse)(req.EndGetResponse(asyncResult)));
requestState.response = resp;
requestState.totalBytes = requestState.response.ContentLength;
}
else
{
throw new ApplicationException("Unexpected URI");
}
// Set up a stream, for reading response data into it
Stream responseStream = requestState.response.GetResponseStream();
requestState.streamResponse = responseStream;
// Begin reading contents of the response data
IAsyncResult ar = responseStream.BeginRead(requestState.bufferRead, 0, requestState.bufferRead.Length, new AsyncCallback(ReadCallback), requestState);
return;
}
catch (WebException ex) {
//Callback to GUI to report an error has occured.
if (requestState.errorCB != null)
{
requestState.errorCB(ex);
}
}
}
