/// <summary>
/// Sends a request to stop a file transfer.
/// </summary>
private void CancelRequestFileFromServer()
{
if (FileStreamStatus == FileStreamerStatusEnum.Downloading)
{
FileRequestPacket packet = new FileRequestPacket
{
FileRequestType = FileRequestTypeEnum.CancelFileRequest
};
FileStreamStatus = FileStreamerStatusEnum.Stopped;
WinterEngineService.NetworkClient.SendPacket(packet, NetDeliveryMethod.ReliableSequenced);
// Remove partially downloaded file, if it exists.
string filePath = DirectoryPaths.ContentPackageDirectoryPath + LastReceivedFile;
if (File.Exists(filePath))
{
File.Delete(filePath);
}
FileSize = 0;
LastReceivedFile = "";
MissingFiles.Clear();
}
}
/// <summary>
/// Sends a request to start initiating a specific file's data transfer
/// </summary>
/// <param name="fileName"></param>
private void RequestFileFromServer(string fileName)
{
FileStreamStatus = FileStreamerStatusEnum.Downloading;
FileRequestPacket packet = new FileRequestPacket
{
FileRequestType = FileRequestTypeEnum.StartFileRequest,
FileName = fileName
};
WinterEngineService.NetworkClient.SendPacket(packet, NetDeliveryMethod.ReliableSequenced);
}
/// <summary>
/// Processes a packet containing a list of content package files.
/// Files which are not on the client's machine will be added to a list to be downloaded.
/// The first file in this list is requested at the end of this method call.
/// </summary>
/// <param name="packet"></param>
private void ProcessContentPackageListPacket(ContentPackageListPacket packet)
{
if (packet.FileNames != null)
{
foreach (string fileName in packet.FileNames)
{
string filePath = DirectoryPaths.ContentPackageDirectoryPath + fileName;
if (!File.Exists(filePath))
{
MissingFiles.Add(fileName);
}
}
}
if (MissingFiles.Count > 0)
{
RequestFileFromServer(MissingFiles[0]);
}
else
{
FileStreamStatus = FileStreamerStatusEnum.Complete;
}
}
/// <summary>
/// Processes a streaming file packet, building a file as bytes are received.
/// Files received must be content packages for security reasons.
/// </summary>
/// <param name="packet"></param>
private void ProcessStreamingFilePacket(StreamingFilePacket packet)
{
if (Path.GetExtension(packet.FileName) == FileExtensionFactory.GetFileExtension(FileTypeEnum.ContentPackage) && FileStreamStatus == FileStreamerStatusEnum.Downloading)
{
string filePath = DirectoryPaths.ContentPackageDirectoryPath + packet.FileName;
if (!File.Exists(filePath))
{
File.Create(filePath).Close();
}
LastReceivedFile = packet.FileName;
using (FileStream fileStream = new FileStream(filePath, FileMode.Append))
{
fileStream.Write(packet.FileBytes, 0, (int)packet.FileBytes.Length);
}
// If this is the end of the file, we need to remove it from the list
// and request the next file from the server.
if (packet.IsEndOfFile)
{
MissingFiles.Remove(packet.FileName);
if (MissingFiles.Count > 0)
{
FileStreamStatus = FileStreamerStatusEnum.Stopped;
RequestFileFromServer(MissingFiles[0]);
}
else
{
FileStreamStatus = FileStreamerStatusEnum.Complete;
}
}
}
}
