http://www.c-sharpcorner.com/Forums/Thread/59726/
c# windows service tcp socket server
Posted on: 27 May 2009
Hi,
I think this is the closest thread I could find, I have been going crazy trying to find what is wrong with my code. I am writing a Windows Service which is a TCP server that executes Power Shell scripts and send the result back to clients. I call the service by sending a simple string as paramater like: perl client.pl get-command . The server returns the results and my perl client receives and displays them. Here is the code, and I will be very thankful for any tips and pointers:
namespace WindowsService1
{
public partial class Service1 : ServiceBase
{
public TcpListener threadListener;
public Service1()
{
InitializeComponent();
}
TcpListener server = null;
Thread serverThread = null;
bool serverPaused = false;
protected override void OnStart(string[] args)
{
serverThread = new Thread(new ThreadStart(Serve));
serverThread.Start();
}
protected override void OnStop()
{
}
private void Serve()
{
server = new TcpListener(IPAddress.Any, 8888);
server.Start();
while (server != null)
{
try
{
if (serverPaused) { Thread.Sleep(10); continue; }
Socket s = server.AcceptSocket();
EventLog.WriteEntry("Accepted " + ((IPEndPoint)s.RemoteEndPoint));
string welcome = "Message from PowerShell Server ...";
byte[] b = System.Text.Encoding.ASCII.GetBytes(welcome);
s.Send(b, b.Length, 0);
EventLog.WriteEntry("Sent welcome to " + ((IPEndPoint)s.RemoteEndPoint));
//PS Server Code
byte[] data = new byte[204800];
int recv;
TcpClient client = threadListener.AcceptTcpClient();
NetworkStream ns = client.GetStream();
recv = ns.Read(data, 0, data.Length);
string cmd = Encoding.ASCII.GetString(data, 0, recv);
string stringRunShell = RunShell(cmd);
byte[] byteData = Encoding.ASCII.GetBytes(stringRunShell.ToString());
// Begin sending the data to the remote machine.
if (byteData.Length > 0)
{
ns.Write(byteData, 0, byteData.Length);
ns.Close();
}
else
{
ns.Write(data, 0, recv);
}
s.Close();
}
catch (System.Exception ex)
{
System.Console.WriteLine(ex.Message);
}
}
}
public string RunShell(string cmd)
{
Runspace runspace = RunspaceFactory.CreateRunspace();
runspace.Open();
Pipeline pipeline = runspace.CreatePipeline();
pipeline.Commands.AddScript(cmd);
//Conver the objects returned to formatted strings
pipeline.Commands.Add("Out-String");
Collection<PSObject> results = pipeline.Invoke();
runspace.Close();
StringBuilder builtString = new StringBuilder();
foreach (PSObject obj in results)
{
builtString.AppendLine(obj.ToString());
}
//Console.WriteLine(stringBuilder.ToString());
return builtString.ToString();
}
}
}
Thanks
-Sami
