private PayloadInfo GetRemotePayloadInfo(string url)
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "Head";
req.KeepAlive = false;
HttpWebResponse response;
PayloadInfo payloadInfo;
try
{
LegacyDownloader.Add64BitRange(req, 0L, 0L);
response = (HttpWebResponse)req.GetResponse();
string httpResponseHeaders = LegacyDownloader.GetHTTPResponseHeaders(response);
this.mResponseHeaders = response.Headers;
Logger.Warning(httpResponseHeaders);
payloadInfo = response.StatusCode != HttpStatusCode.PartialContent ? (response.StatusCode != HttpStatusCode.OK ? new PayloadInfo(false, 0L, true) : (!httpResponseHeaders.Contains("Accept-Ranges: bytes") ? new PayloadInfo(false, response.ContentLength, false) : new PayloadInfo(true, response.ContentLength, false))) : new PayloadInfo(true, LegacyDownloader.GetSizeFromContentRange(response), false);
}
catch (Exception ex)
{
Logger.Error(ex.ToString());
throw;
}
response.Close();
return(payloadInfo);
}
public void DoWork(object data)
{
LegacyDownloader.Worker worker = (LegacyDownloader.Worker)data;
Range range = worker?.Range;
Stream stream1 = (Stream)null;
HttpWebResponse res = (HttpWebResponse)null;
Stream stream2 = (Stream)null;
try
{
Logger.Info("WorkerId {0} range.From = {1}, range.To = {2}", (object)worker.Id, (object)range.From, (object)range.To);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(worker.URL);
req.KeepAlive = true;
if (System.IO.File.Exists(worker.PartFileName))
{
stream1 = (Stream) new FileStream(worker.PartFileName, FileMode.Append, FileAccess.Write, FileShare.None);
if (stream1.Length == range.Length)
{
worker.TotalFileDownloaded = stream1.Length;
worker.PercentComplete = 100;
Logger.Info("WorkerId {0} already downloaded", (object)worker.Id);
return;
}
worker.TotalFileDownloaded = stream1.Length;
worker.PercentComplete = (int)(stream1.Length * 100L / range.Length);
Logger.Info("WorkerId {0} Resuming from range.From = {1}, range.To = {2}", (object)worker.Id, (object)(range.From + stream1.Length), (object)range.To);
if (this.mNrWorkers > 1)
{
LegacyDownloader.Add64BitRange(req, range.From + stream1.Length, range.To);
}
}
else
{
worker.TotalFileDownloaded = 0L;
worker.PercentComplete = 0;
stream1 = (Stream) new FileStream(worker.PartFileName, FileMode.Create, FileAccess.Write, FileShare.None);
if (this.mNrWorkers > 1)
{
LegacyDownloader.Add64BitRange(req, range.From + stream1.Length, range.To);
}
}
req.ReadWriteTimeout = 60000;
res = (HttpWebResponse)req.GetResponse();
long contentLength = res.ContentLength;
stream2 = res.GetResponseStream();
int count1 = 65536;
byte[] buffer = new byte[count1];
long num = 0;
Logger.Warning(string.Format((IFormatProvider)CultureInfo.InvariantCulture, "WorkerId {0}\n", (object)worker.Id) + LegacyDownloader.GetHTTPResponseHeaders(res));
int count2;
while ((count2 = stream2.Read(buffer, 0, count1)) > 0)
{
if (worker.Cancelled)
{
throw new OperationCanceledException("Download cancelled by user.");
}
stream1.Write(buffer, 0, count2);
num += (long)count2;
worker.TotalFileDownloaded = stream1.Length;
worker.PercentComplete = (int)(stream1.Length * 100L / range.Length);
}
if (contentLength != num)
{
throw new Exception(string.Format((IFormatProvider)CultureInfo.InvariantCulture, "totalContentRead({0}) != contentLength({1})", (object)num, (object)contentLength));
}
}
catch (Exception ex)
{
worker.Exception = ex;
Logger.Error(ex.ToString());
}
finally
{
stream2?.Close();
res?.Close();
if (stream1 != null)
{
stream1.Flush();
stream1.Close();
}
}
Logger.Info("WorkerId {0} Finished", (object)worker.Id);
}