/// <summary>
/// Broadcasts a position message to all online users
/// </summary>
/// <param name="Message">The chat message to be broadcasted</param>
/// <param name="AContext">The user's connection context</param>
private static void SetPosition(RCATContext RContext, ServerMessage message)
{
try
{
User user = new User();
user = (User)serializer.Deserialize(new JTokenReader(message.Data), typeof(User));
dataConnector.SetPosition(user.n, user.p, message.TimeStamp);
string[] clients = dataConnector.GetAllUsersNames();
dynamic data = new { n = user.n, p = user.p };
RContext.Broadcast(data, clients, ResponseType.Position, message.TimeStamp);
}
catch (Exception e)
{
Log.Error(e);
}
}
/// <summary>
/// Informs a user of all the existing clients.
/// </summary>
private static void SendAllUsers(RCATContext RContext, string client)
{
try
{
ClientMessage r = new ClientMessage();
r = new ClientMessage();
r.Type = ResponseType.AllUsers;
r.clients = new string[1];
r.clients[0] = client;
// Using database
User[] arr = dataConnector.GetAllUsers();
r.Data = new { Users = arr };
RContext.Send(JsonConvert.SerializeObject(r));
}
catch (Exception e)
{
Log.Error("Exception in SendAllUsers:",e);
}
}
protected static void RunServer(IAsyncResult AResult)
{
// Server connection
//TcpClient TcpConnection = null;
try
{
proxy.EndConnect(AResult);
}
catch (Exception e) { Log.Error("Connect Failed", e); }
if (proxy != null)
{
using (RCATContext RContext = new RCATContext())
{
try
{
RContext.proxyConnection = proxy;
while (proxy.Connected)
{
if (RContext.ReceiveReady.Wait(TimeOut))
{
proxy.Client.BeginReceive(RContext.buffer, 0, RCATContext.DefaultBufferSize, SocketFlags.None, new AsyncCallback(DoReceive), RContext);
}
else
{
Log.Warn("[RCAT]: Server timed out connection with proxy.");
break;
}
}
}
catch (Exception e) { Log.Warn("Server Forcefully Disconnected", e); }
}
}
}
// Handles the server request. Broadcast is the only server side functionality at this point.
protected static void HandleRequest(RCATContext context, List<string> commands)
{
int i = 0; //index in server.sb
foreach (string s in commands)
{
try
{
if (s != "")
{
Log.Info("[PROXY->SERVANT]: Received: " + s);
ServerMessage message = Newtonsoft.Json.JsonConvert.DeserializeObject<ServerMessage>(s);
// a bug happens at this line when the servant has to concatenate multiple JSON msg together
if (message.Type == ResponseType.Connection)
OnConnect(context, message);
else if (message.Type == ResponseType.Disconnect)
OnDisconnect(context, message);
else if (message.Type == ResponseType.Position)
SetPosition(context, message);
else
Log.Warn("[RCAT]: Unknown message.Type: " + message.Type.ToString());
i++;
}
}
catch
{
Log.Warn("[RCAT]: Error parsing JSON in RCAT.HandleRequest. JSON message was: " + commands[i]);
//Log.Debug(e);s
}
}
}
// NOTE: This is not safe code. You may end up broadcasting to people who
// disconnected. Luckily for us, Alchemy handles exceptions in its event methods, so we don't
// have random, catastrophic changes.
/// <summary>
/// Event triggered when a user disconnected from a proxy
/// Remove a user from the online users list
/// and broadcast the disconnection message to all connected users.
/// </summary>
/// <param name="AContext">The user's connection context</param>
public static void OnDisconnect(RCATContext RContext, ServerMessage message)
{
try
{
Log.Info("[PROXY->SERVANT]: User disconnected: " + message.Data);
User user = dataConnector.GetUser(message.Data);
Message r = new Message();
if (!String.IsNullOrEmpty(user.n))
{
dataConnector.RemoveUser(user.n);
string[] clients = dataConnector.GetAllUsersNames();
RContext.Broadcast(new { n = user.n }, clients, ResponseType.Disconnect, message.TimeStamp);
}
else
Log.Warn("[PROXY->SERVANT]: User " + user.n + " not found OnDisconnect.");
}
catch (Exception e)
{
Log.Error("[PROXY->SERVANT]: Error in OnDisconnect.",e);
}
}
/// <summary>
/// Event fired when a client connects to the Alchemy Websockets server instance.
/// Adds the client to the online users list.
/// </summary>
/// <param name="AContext">The user's connection context</param>
public static void OnConnect(RCATContext RContext, ServerMessage message)
{
try
{
Log.Info("Client Connection From : " + (string)message.Data);
SendAllUsers(RContext, message.Data);
}
catch (Exception e)
{
Log.Error("Exception in OnConnect", e);
}
}