public override void HandleGetCmd(SDSession session)
{
// read the document name from the client
string documentName = socketReader.ReadLine();
Console.WriteLine("Getting document " + documentName);
// lookup the document in the session
try
{
string documentContents = session.GetValue(documentName);
Console.WriteLine("Found value " + documentName);
// send the document name and length to the client
socketWriter.WriteLine("success");
socketWriter.WriteLine(documentName);
socketWriter.WriteLine(documentContents.Length.ToString());
socketWriter.Flush();
// send the document contents to the client
socketWriter.Write(documentContents);
socketWriter.Flush();
Console.WriteLine("Sent contents of " + documentName);
}
catch (Exception ex)
{
SendError(ex.Message);
}
}
public ClientThread(Socket clientSocket, SessionTable sessionTable)
{
this.clientSocket = clientSocket;
this.sessionTable = sessionTable;
session = null;
currentState = null;
theThread = new Thread(new ParameterizedThreadStart(ClientThreadFunc));
}
public SDSession NewSession()
{
// allocate a new session, with a unique ID and save it for later in the session table
ulong sessionId = nextSessionId++;
SDSession session = new SDSession(sessionId);
sessionTable[sessionId] = session;
return(session);
}
public SDSession Lookup(ulong Sessionid)
{
if (sessionTable.ContainsKey(Sessionid))
{
SDSession session = sessionTable[Sessionid];
return(session);
}
return(null);//no match found
}
public ClientThread(Socket clientSocket, SessionTable sessionTable)
{
socketNetworkStream = new NetworkStream(clientSocket);
socketReader = new StreamReader(socketNetworkStream);
socketWriter = new StreamWriter(socketNetworkStream);
this.clientSocket = clientSocket;
this.sessionTable = sessionTable;
session = null;
currentState = null;
theThread = new Thread(new ParameterizedThreadStart(ClientThreadFunc));
}
public override SDSession HandleResumeCmd()
{
ulong sessionId = System.Convert.ToUInt64(client.socketReader.ReadLine());
SDSession session = client.sessionTable.Lookup(sessionId); //lookup the session ID
if (session == null) //The lookup was not valid
{
client.socketWriter.WriteLine("rejected");
client.socketWriter.WriteLine("Session does not exist");
}
return(null);
}
override public SDSession HandleOpenCmd()
{
// create a new session for the client
SDSession session = sessionTable.NewSession();
Console.WriteLine("Creating new session with session ID" + session.ID);
// send Accepted(sessionId)
socketWriter.WriteLine("accepted");
socketWriter.WriteLine(session.ID.ToString());
socketWriter.Flush();
return(session);
}
private void Run()
{
currentState = new ReadyForSessionCmd(this);
bool done = false;
while (!done && clientSocket.Connected)
{
// read the next command from the client
string cmd = socketReader.ReadLine();
if (cmd == null)
{
// client disconnected
done = true;
break;
}
Console.WriteLine("Received cmd " + cmd);
switch (cmd)
{
case "close":
Console.WriteLine("Recieved Close command");
currentState.HandleCloseCmd(); //handle the command
currentState = new ReadyForSessionCmd(this);
break;
case "open":
{
Console.WriteLine("Received OPEN cmd from client");
session = currentState.HandleOpenCmd();
if (session == null)
{
Console.WriteLine("Unable to open new session");
}
else
{
currentState = new ReadyForDocumentCmd(this);
}
}
break;
case "resume":
{
Console.WriteLine("Received RESUME cmd from client");
// parse out the sessionId
session = currentState.HandleResumeCmd();
if (session != null)
{
// successfully resumed session
// change state
currentState = new ReadyForDocumentCmd(this);
}
else
{
Console.WriteLine("Unable to Resume session");
}
}
break;
case "post":
{
Console.WriteLine("Received POST cmd from client");
currentState.HandlePostCmd();
currentState = new ReadyForSessionCmd(this);
}
break;
case "get":
{
Console.WriteLine("Received GET cmd from client");
currentState.HandleGetCmd();
currentState = new ReadyForSessionCmd(this);
}
break;
case "exit":
Console.WriteLine("Received EXIT cmd from client");
done = true;
break;
default:
Console.WriteLine("Invalid Command Recieved from Client");
break;
}
}
// disconnect from client and close the socket, it's stream and reader/writer
Console.WriteLine("Disconnecting from client");
clientSocket.Disconnect(false);
socketNetworkStream.Close();
socketReader.Close();
socketWriter.Close();
clientSocket.Close();
Console.WriteLine("Disconnected from client");
}
public abstract void HandleGetCmd(SDSession session);
private void Run()
{
NetworkStream socketNetworkStream = new NetworkStream(clientSocket);
StreamReader socketReader = new StreamReader(socketNetworkStream);
StreamWriter socketWriter = new StreamWriter(socketNetworkStream);
currentState = new ReadyForSessionCmd(sessionTable, socketNetworkStream, socketReader, socketWriter);
bool done = false;
while (!done && clientSocket.Connected)
{
// read the next command from the client
string cmd = socketReader.ReadLine();
if (cmd == null)
{
// client disconnected
done = true;
break;
}
Console.WriteLine("Received cmd " + cmd);
switch (cmd)
{
case "open":
session = currentState.HandleOpenCmd();
currentState = new ReadyForDocumentCmd(sessionTable, socketNetworkStream, socketReader, socketWriter);
break;
case "resume":
{
// parse out the sessionId
ulong sessionId = 0;
session = currentState.HandleResumeCmd(sessionId);
if (session != null)
{
// successfully resumed session
// change state
currentState = new ReadyForDocumentCmd(sessionTable, socketNetworkStream, socketReader, socketWriter);
}
else
{
//???
}
}
break;
case "get":
{
Console.WriteLine("Received GET cmd from client");
currentState.HandleGetCmd(session);
}
break;
case "exit":
Console.WriteLine("Received EXIT cmd from client");
done = true;
break;
}
}
// disconnect from client and close the socket, it's stream and reader/writer
Console.WriteLine("Disconnecting from client");
clientSocket.Disconnect(false);
socketNetworkStream.Close();
socketReader.Close();
socketWriter.Close();
clientSocket.Close();
Console.WriteLine("Disconnected from client");
}
public override void HandleGetCmd(SDSession session)
{
SendError("No session open");
}
