クライアント/サーバー プログラミングについて学んでおり、非同期クライアント/サーバー チャット アプリケーションを作成しています。
クライアントをサーバーに接続してメッセージを送信できますが、同じメッセージを (テスト目的で) クライアントに送り返すのに問題があります。助けていただければ幸いです...
クライアントコード
byte[] dataBuffer = new byte[10];
public AsyncCallback callBack;
public Socket clientSocket;
IAsyncResult ar;
Random rnd=new Random();
private void btnSend_Click(object sender, RoutedEventArgs e)
{
try
{
Object objData = txtMessage.Text;
byte[] byData = Encoding.ASCII.GetBytes(objData.ToString());
if (clientSocket != null)
{
clientSocket.Send(byData);
lbxMessages.Items.Add(txtMessage.Text);
}
txtMessage.Text = "";
btnSend.IsEnabled = false;
}
catch(SocketException se)
{
MessageBox.Show(se.Message);
}
}
//SocketPacket CLASS
public class SocketPacket
{
public Socket thisSocket;
public byte[] dataBuffer = new byte[10];//test no, prevous [1]
}
//METHODS
private void WaitForData()
{
try
{
if (callBack == null)
{
callBack = new AsyncCallback(OnDataReceived);
}
SocketPacket sckPack = new SocketPacket();
sckPack.thisSocket = clientSocket;
ar = clientSocket.BeginReceive(sckPack.dataBuffer, 0, sckPack.dataBuffer.Length, SocketFlags.None, callBack, sckPack);
}
catch(SocketException se)
{
MessageBox.Show(se.Message);
}
}
public void OnDataReceived(IAsyncResult ar)
{
try
{
SocketPacket sckID = (SocketPacket)ar.AsyncState;
int iRx = sckID.thisSocket.EndReceive(ar);
char[] chars = new char[iRx + 1];
Decoder d = Encoding.UTF8.GetDecoder();
int charLen = d.GetChars(sckID.dataBuffer, 0, iRx, chars, 0);
String szData = new String(chars);
this.Dispatcher.Invoke((Action)(() =>
{
lbxMessages.Items.Add(txtMessage.Text + szData);
}));
WaitForData();
}
catch (ObjectDisposedException)
{
Debugger.Log(0, "1", "\n OnDataRecieved: Socket has been closed\n");
}
catch(SocketException se)
{
MessageBox.Show(se.Message);
}
}
サーバーコード
private void OnClientConnect(IAsyncResult asyncResult)
{
try
{
workerSocket[clientCount] = listenSocket.EndAccept(asyncResult);
WaitForData(workerSocket[clientCount]);
++clientCount;
if (clientCount<4)//allow max 3 clients
{
String str = String.Format("Client # {0} connected", clientCount);
this.Dispatcher.Invoke((Action)(() =>
{
lbxMessages.Items.Add(str);
lblConnectionStatus.Content =clientCount + " Connected";
}));
listenSocket.BeginAccept(OnClientConnect, null);
}
}
catch (ObjectDisposedException)
{
System.Diagnostics.Debugger.Log(0, "1", "\n OnClientConnection: Socket has been closed\n");
}
catch (SocketException se)
{
MessageBox.Show(se.Message);
}
}
public class SocketPacket
{
public Socket currentSocket;
public byte[] dataBuffer = new byte[50];//allowing the 50 digist to be sent at once
}
private void WaitForData(Socket socket)
{
try
{
if (workerCallBack == null)
{
workerCallBack = OnDataReceived;
}
SocketPacket sckPack = new SocketPacket();
sckPack.currentSocket = socket;
socket.BeginReceive(sckPack.dataBuffer, 0, sckPack.dataBuffer.Length, SocketFlags.None, workerCallBack, sckPack);
}
catch(SocketException se)
{
MessageBox.Show(se.Message);
}
}
public void OnDataReceived(IAsyncResult asyncResult)
{
try
{
SocketPacket socketData = (SocketPacket)asyncResult.AsyncState;
int iRx = 0;
iRx = socketData.currentSocket.EndReceive(asyncResult);
char[] chars = new char[iRx];
Decoder decoder = Encoding.UTF8.GetDecoder();
int charLen = decoder.GetChars(socketData.dataBuffer, 0, iRx, chars, 0);
String receivedData = new String(chars);
this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() => lbxMessages.Items.Add(receivedData)));
//Does not work - does not send same message back to client
//byte[] byData = Encoding.ASCII.GetBytes(receivedData);
//if (listenSocket != null)
//{
// listenSocket.Send(byData);
//}
WaitForData(socketData.currentSocket);
}
catch (ObjectDisposedException)
{
System.Diagnostics.Debugger.Log(0, "1", "\n OnDataRecieved: Socket has been closed\n");
}
catch (SocketException se)
{
MessageBox.Show(se.Message);
}
}