private async Task HandleWebSocket(WebSocketContext context)
{
var closed = false;
var maxMessageSize = 2 * 1024 * 1024;
var data = new byte[maxMessageSize];
var socket = context.WebSocket;
UploadEntry uploadModel = null;
while (!closed)
{
try
{
var receive = await socket.ReceiveAsync(new ArraySegment <byte>(data), CancellationToken.None);
if (receive.MessageType == WebSocketMessageType.Close)
{
new Database().SaveUploadEntryInDatabase(uploadModel);
await socket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, CancellationToken.None);
closed = true;
}
else if (receive.MessageType == WebSocketMessageType.Binary && uploadModel != null)
{
using (var writer = new BinaryWriter(new FileStream(Server.MapPath("~/" + uploadModel.UploadUrl), FileMode.Append)))
{
writer.Write(data, 0, receive.Count);
await socket.SendAsync(new ArraySegment <byte>(Encoding.UTF8.GetBytes("{ \"received\": " + writer.BaseStream.Position + " }")),
WebSocketMessageType.Text, true, CancellationToken.None);
}
}
else
{
var receivedString = Encoding.UTF8.GetString(data, 0, receive.Count);
uploadModel = JsonConvert.DeserializeObject <UploadEntry>(receivedString);
var path = "/Content/Uploads/" + uploadModel.FileName;
//path = Path.ChangeExtension(path, "png");
uploadModel.UploadUrl = path;
IOWrapper.DeleteFileFromUploads(uploadModel.FileName);
var output = new ArraySegment <byte>(Encoding.UTF8.GetBytes("{ \"accepted\": true }"));
await socket.SendAsync(output, WebSocketMessageType.Text, true, CancellationToken.None);
}
}
catch (Exception ex)
{
if (socket != null)
{
await socket.CloseAsync(WebSocketCloseStatus.InternalServerError, ex.Message, CancellationToken.None);
}
closed = true;
}
}
}
internal ActionResult Upload(UploadEntry entry)
{
if (entry.UploadFile != null && entry.UploadFile.ContentLength > 0)
{
var path = uploadsPath + Path.GetRandomFileName();
path = Path.ChangeExtension(path, Path.GetExtension(entry.UploadFile.FileName));
entry.UploadFile.SaveAs(Server.MapPath(path));
entry.UploadUrl = path;
}
else if (!string.IsNullOrEmpty(entry.CameraImage))
{
var path = uploadsPath + Path.GetRandomFileName();
System.IO.File.WriteAllBytes(Server.MapPath(path), Convert.FromBase64String(entry.CameraImage.Substring(DataUrlPrefix.Length)));
entry.UploadUrl = path;
}
new Database().SaveUploadEntryInDatabase(entry);
return(RedirectToAction("Index"));
}
