private static void ReadCallback(IAsyncResult ar)
{
DotNetUrlDownloader.DownloadState downloadState = (DotNetUrlDownloader.DownloadState)ar.get_AsyncState();
bool flag = true;
try
{
Stream responseStream = downloadState.responseStream;
int num = responseStream.EndRead(ar);
if (num > 0)
{
flag = false;
Array.Copy(downloadState.readBuffer, 0, downloadState.downloadResult.downloadData, downloadState.readPos, num);
downloadState.readPos += num;
responseStream.BeginRead(downloadState.readBuffer, 0, downloadState.readBuffer.Length, new AsyncCallback(DotNetUrlDownloader.ReadCallback), downloadState);
}
else if (num == 0)
{
downloadState.downloadResult.succeeded = true;
}
}
catch (Exception)
{
}
if (flag)
{
DotNetUrlDownloader.FinishDownload(downloadState);
}
}
private static void FinishDownload(DotNetUrlDownloader.DownloadState state)
{
if (!state.downloadResult.succeeded && state.numRetriesLeft > 0)
{
state.numRetriesLeft--;
DotNetUrlDownloader.Download(state);
return;
}
List <DotNetUrlDownloader.DownloadResult> completedDownloads = state.downloader.m_completedDownloads;
lock (completedDownloads)
{
state.downloader.m_completedDownloads.Add(state.downloadResult);
}
}
public void Download(string url, UrlDownloadCompletedCallback cb, UrlDownloaderConfig config)
{
WebRequest request = WebRequest.Create(url);
DotNetUrlDownloader.DownloadResult downloadResult = new DotNetUrlDownloader.DownloadResult();
downloadResult.callback = cb;
DotNetUrlDownloader.Download(new DotNetUrlDownloader.DownloadState
{
downloader = this,
host = url,
downloadResult = downloadResult,
request = request,
numRetriesLeft = config.numRetries,
timeoutMs = config.timeoutMs
});
}
private static void ResponseCallback(IAsyncResult ar)
{
DotNetUrlDownloader.DownloadState asyncState = (DotNetUrlDownloader.DownloadState)ar.AsyncState;
try
{
WebResponse webResponse = asyncState.request.EndGetResponse(ar);
Stream responseStream = webResponse.GetResponseStream();
asyncState.responseStream = responseStream;
asyncState.downloadResult.downloadData = new byte[checked ((IntPtr)webResponse.ContentLength)];
responseStream.BeginRead(asyncState.readBuffer, 0, (int)asyncState.readBuffer.Length, new AsyncCallback(DotNetUrlDownloader.ReadCallback), asyncState);
}
catch (Exception exception)
{
DotNetUrlDownloader.FinishDownload(asyncState);
}
}
private static void ResponseCallback(IAsyncResult ar)
{
DotNetUrlDownloader.DownloadState downloadState = (DotNetUrlDownloader.DownloadState)ar.get_AsyncState();
try
{
WebRequest request = downloadState.request;
WebResponse webResponse = request.EndGetResponse(ar);
Stream responseStream = webResponse.GetResponseStream();
downloadState.responseStream = responseStream;
downloadState.downloadResult.downloadData = new byte[webResponse.get_ContentLength()];
responseStream.BeginRead(downloadState.readBuffer, 0, downloadState.readBuffer.Length, new AsyncCallback(DotNetUrlDownloader.ReadCallback), downloadState);
}
catch (Exception)
{
DotNetUrlDownloader.FinishDownload(downloadState);
}
}
private static void Download(DotNetUrlDownloader.DownloadState state)
{
try
{
IAsyncResult asyncResult = state.request.BeginGetResponse(new AsyncCallback(DotNetUrlDownloader.ResponseCallback), state);
int num = state.timeoutMs;
if (num < 0)
{
num = -1;
}
state.timeoutWatchHandle = asyncResult.get_AsyncWaitHandle();
state.timeoutWaitHandle = ThreadPool.RegisterWaitForSingleObject(state.timeoutWatchHandle, new WaitOrTimerCallback(DotNetUrlDownloader.TimeoutCallback), state, num, true);
}
catch (Exception)
{
DotNetUrlDownloader.FinishDownload(state);
}
}
