201506091403C# Socket Server
如題，在VS 2012環境用C#寫一個Socket Server，在本機開啟12345連接埠並listen...
大部分的code是從MSDN參考而來，再把一些不必要的東西拿掉。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
namespace SocketServer
{
class Program
{
static Socket listener;
private static ManualResetEvent allDone = new ManualResetEvent(false);
private static bool listening = true;
static string latestData = null;
static string localIp = "127.0.0.1";
static int port = 12345;
static void Main(string[] args)
{
new Thread(StartListening).Start();
Console.ReadLine();
}
/// <summary>
/// 開啟Socket監聽port
/// </summary>
private static void StartListening()
{
byte[] bytes = new Byte[1024];
IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Parse(localIp), port);
listener = new Socket(AddressFamily.InterNetwork,
SocketType.Stream, ProtocolType.Tcp);
try
{
listener.Bind(localEndPoint);
listener.Listen(100);
while (listening)
{
// Set the event to nonsignaled state.
allDone.Reset();
// Start an asynchronous socket to listen for connections.
Console.WriteLine("Waiting for a connection...");
listener.BeginAccept(
new AsyncCallback(AcceptCallback),
listener);
// Wait until a connection is made before continuing.
allDone.WaitOne();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private static void AcceptCallback(IAsyncResult ar)
{
allDone.Set();
Socket listener = (Socket)ar.AsyncState;
Socket handler = listener.EndAccept(ar);
StateObject state = new StateObject();
state.workSocket = handler;
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
private static void ReadCallback(IAsyncResult ar)
{
String content = String.Empty;
StateObject state = (StateObject)ar.AsyncState;
Socket handler = state.workSocket;
int bytesRead = handler.EndReceive(ar);
if (bytesRead > 0)
{
// There might be more data, so store the data received so far.
state.sb.Append(Encoding.ASCII.GetString(
state.buffer, 0, bytesRead));
// Check for end-of-file tag. If it is not there, read
// more data.
content = state.sb.ToString();
if (content.IndexOf("<EOF>") > -1)
{
// All the data has been read
latestData = content.Substring(0, content.Length - 5);
Console.WriteLine("Read {0} bytes from socket. \n Data : {1}",
content.Length, latestData);
handler.Shutdown(SocketShutdown.Both);
handler.Close();
}
else
{
// Not all data received. Get more.
handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
new AsyncCallback(ReadCallback), state);
}
}
}
}
public class StateObject
{
// Client socket.
public Socket workSocket = null;
// Size of receive buffer.
public const int BufferSize = 256;
// Receive buffer.
public byte[] buffer = new byte[BufferSize];
// Received data string.
public StringBuilder sb = new StringBuilder();
}
}
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