实例介绍
【实例简介】WEBSOCKET 在线实时聊天，基本代码引用网上教程，添加了离线消息和私聊功能
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Collections;
namespace WebSocketServer
{
public class Logger
{
public bool LogEvents { get; set; }
public Logger()
{
LogEvents = true;
}
public void Log(string Text)
{
if (LogEvents) Console.WriteLine(Text);
}
}
public enum ServerStatusLevel { Off, WaitingConnection, ConnectionEstablished };
public delegate void NewConnectionEventHandler(string loginName,EventArgs e);
public delegate void DataReceivedEventHandler(Object sender, string message, EventArgs e);
public delegate void DisconnectedEventHandler(Object sender,EventArgs e);
public delegate void BroadcastEventHandler(string message, EventArgs e);
public class WebSocketServer : IDisposable
{
private bool AlreadyDisposed;
private Socket Listener;
private int ConnectionsQueueLength;
private int MaxBufferSize;
private string Handshake;
private StreamReader ConnectionReader;
private StreamWriter ConnectionWriter;
private Logger logger;
private byte[] FirstByte;
private byte[] LastByte;
private byte[] ServerKey1;
private byte[] ServerKey2;
List<SocketConnection> connectionSocketList = new List<SocketConnection>();
public ServerStatusLevel Status { get; private set; }
public int ServerPort { get; set; }
public string ServerLocation { get; set; }
public string ConnectionOrigin { get; set; }
public bool LogEvents {
get { return logger.LogEvents; }
set { logger.LogEvents = value; }
}
public event NewConnectionEventHandler NewConnection;
public event DataReceivedEventHandler DataReceived;
public event DisconnectedEventHandler Disconnected;
public string OfflineUser = "";
public string OfflineMessage = "";
private void Initialize()
{
AlreadyDisposed = false;
logger = new Logger();
Status = ServerStatusLevel.Off;
//连接数量
ConnectionsQueueLength = 500;
//最大缓存
MaxBufferSize = 1024 * 100;
FirstByte = new byte[MaxBufferSize];
LastByte = new byte[MaxBufferSize];
FirstByte[0] = 0x00;
LastByte[0] = 0xFF;
logger.LogEvents = true;
}
public WebSocketServer()
{
ServerPort = 4141;
ServerLocation = string.Format("ws://{0}:4141/chat", getLocalmachineIPAddress());
Initialize();
}
public WebSocketServer(int serverPort, string serverLocation, string connectionOrigin)
{
ServerPort = serverPort;
ConnectionOrigin = connectionOrigin;
ServerLocation = serverLocation;
Initialize();
}
~WebSocketServer()
{
Close();
}
public void Dispose()
{
Close();
}
private void Close()
{
if (!AlreadyDisposed)
{
AlreadyDisposed = true;
if (Listener != null) Listener.Close();
foreach (SocketConnection item in connectionSocketList)
{
item.ConnectionSocket.Close();
}
connectionSocketList.Clear();
GC.SuppressFinalize(this);
}
}
public static IPAddress getLocalmachineIPAddress()
{
string strHostName = Dns.GetHostName();
IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
foreach (IPAddress ip in ipEntry.AddressList)
{
//IPV4
if (ip.AddressFamily == AddressFamily.InterNetwork)
return ip;
}
return ipEntry.AddressList[0];
}
public void StartServer()
{
Char char1 = Convert.ToChar(65533);
Listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
Listener.Bind(new IPEndPoint(getLocalmachineIPAddress(), ServerPort));
Listener.Listen(ConnectionsQueueLength);
logger.Log(string.Format("聊天服务器启动。监听地址：{0}, 端口：{1}",getLocalmachineIPAddress(),ServerPort));
logger.Log(string.Format("WebSocket服务器地址: ws://{0}:{1}/chat", getLocalmachineIPAddress(), ServerPort));
while (true)
{
Socket sc = Listener.Accept();
if (sc != null)
{
System.Threading.Thread.Sleep(100);
SocketConnection socketConn = new SocketConnection();
socketConn.ConnectionSocket = sc;
socketConn.NewConnection = new NewConnectionEventHandler(socketConn_NewConnection);
socketConn.DataReceived = new DataReceivedEventHandler(socketConn_BroadcastMessage);
socketConn.Disconnected = new DisconnectedEventHandler(socketConn_Disconnected);
socketConn.ConnectionSocket.BeginReceive(socketConn.receivedDataBuffer,
0, socketConn.receivedDataBuffer.Length,
0, new AsyncCallback(socketConn.ManageHandshake),
socketConn.ConnectionSocket.Available);
connectionSocketList.Add(socketConn);
}
}
}
void socketConn_Disconnected(Object sender, EventArgs e)
{
SocketConnection sConn = sender as SocketConnection;
if (sConn != null)
{
Send(string.Format("【{0}】离开了聊天室！", sConn.Name));
sConn.ConnectionSocket.Close();
//移除队列
connectionSocketList.Remove(sConn);
//添加离线成员
OfflineUser = sConn.Name ",";
}
}
void socketConn_BroadcastMessage(Object sender, string message, EventArgs e)
{
if (message.IndexOf("login:") != -1)
{
SocketConnection sConn = sender as SocketConnection;
sConn.Name = message.Substring(message.IndexOf("login:") "login:".Length);
message = string.Format("欢迎【{0}】来到聊天室！",message.Substring(message.IndexOf("login:") "login:".Length));
}
if (message.IndexOf("User:") != -1 && message.IndexOf("Content:") != -1)
{
SocketConnection sConn = sender as SocketConnection;
string user = message.Substring(message.IndexOf("User:") "User:".Length, message.IndexOf("Content:") - message.IndexOf("User:") - "User:".Length);
string mes = message.Substring(message.IndexOf("Content:") "Content:".Length);
Send(user, mes);
return;
}
Send(message);
}
void socketConn_NewConnection(string name, EventArgs e)
{
if (NewConnection != null)
NewConnection(name,EventArgs.Empty);
}
public void Send(string name, string message)
{
foreach (SocketConnection item in connectionSocketList)
{
if (!item.ConnectionSocket.Connected) { return; }
if (OfflineUser.Contains(name))
{
OfflineMessage = message;
}
if (name == item.Name)
{
try
{
if (item.IsDataMasked)
{
DataFrame dr = new DataFrame(message);
item.ConnectionSocket.Send(dr.GetBytes());
}
else
{
item.ConnectionSocket.Send(FirstByte);
item.ConnectionSocket.Send(Encoding.UTF8.GetBytes(message));
item.ConnectionSocket.Send(LastByte);
}
}
catch (Exception ex)
{
logger.Log(ex.Message);
}
}
}
}
public void Send(string message)
{
if (OfflineUser != "")
{
OfflineMessage = "离线消息" message "\n";
}
foreach (SocketConnection item in connectionSocketList)
{
if (!item.ConnectionSocket.Connected) { return; }
if (OfflineUser.Contains(item.Name))
{
message = OfflineMessage;
OfflineUser = "";
OfflineMessage = "";
}
try
{
if (item.IsDataMasked)
{
DataFrame dr = new DataFrame(message);
item.ConnectionSocket.Send(dr.GetBytes());
}
else
{
item.ConnectionSocket.Send(FirstByte);
item.ConnectionSocket.Send(Encoding.UTF8.GetBytes(message));
item.ConnectionSocket.Send(LastByte);
}
}
catch (Exception ex)
{
logger.Log(ex.Message);
}
}
}
}
}
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