在IIS上搭建WebSocket服务器

服务器端代码编写

1.新建一个ASP.net Web MVC5项目

2.新建一个“一般处理程序”

3.Handler1.ashx代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.WebSockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Web;
using System.Web.WebSockets;
namespace WebApplicationWebsocketHandler
{
/// <summary>
/// 离线消息
/// </summary>
public class MessageInfo
{
public MessageInfo(DateTime _MsgTime, ArraySegment<byte> _MsgContent)
{
MsgTime = _MsgTime;
MsgContent = _MsgContent;
}
public DateTime MsgTime { get; set; }
public ArraySegment<byte> MsgContent { get; set; }
}
/// <summary>
/// Handler1 的摘要说明
/// </summary>
public class Handler1 : IHttpHandler
{
private static Dictionary<string, WebSocket> CONNECT_POOL = new Dictionary<string, WebSocket>();//用户连接池
private static Dictionary<string, List<MessageInfo>> MESSAGE_POOL = new Dictionary<string, List<MessageInfo>>();//离线消息池
public void ProcessRequest(HttpContext context)
{
//context.Response.ContentType = "text/plain";
//context.Response.Write("Hello World");
if (context.IsWebSocketRequest)
{
context.AcceptWebSocketRequest(ProcessChat);
}
}
private async Task ProcessChat(AspNetWebSocketContext context)
{
WebSocket socket = context.WebSocket;
string user = context.QueryString["user"].ToString();
try
{
#region 用户添加连接池
//第一次open时，添加到连接池中
if (!CONNECT_POOL.ContainsKey(user))
CONNECT_POOL.Add(user, socket);//不存在，添加
else
if (socket != CONNECT_POOL[user])//当前对象不一致，更新
CONNECT_POOL[user] = socket;
#endregion
#region 离线消息处理
if (MESSAGE_POOL.ContainsKey(user))
{
List<MessageInfo> msgs = MESSAGE_POOL[user];
foreach (MessageInfo item in msgs)
{
await socket.SendAsync(item.MsgContent, WebSocketMessageType.Text, true, CancellationToken.None);
}
MESSAGE_POOL.Remove(user);//移除离线消息
}
#endregion
string descUser = string.Empty;//目的用户
while (true)
{
if (socket.State == WebSocketState.Open)
{
ArraySegment<byte> buffer = new ArraySegment<byte>(new byte[2048]);
WebSocketReceiveResult result = await socket.ReceiveAsync(buffer, CancellationToken.None);
#region 消息处理（字符截取、消息转发）
try
{
#region 关闭Socket处理，删除连接池
if (socket.State != WebSocketState.Open)//连接关闭
{
if (CONNECT_POOL.ContainsKey(user)) CONNECT_POOL.Remove(user);//删除连接池
break;
}
#endregion
string userMsg = Encoding.UTF8.GetString(buffer.Array, 0, result.Count);//发送过来的消息
string[] msgList = userMsg.Split('|');
if (msgList.Length == 2)
{
if (msgList[0].Trim().Length > 0)
descUser = msgList[0].Trim();//记录消息目的用户
buffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(msgList[1]));
}
else
buffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(userMsg));
if (CONNECT_POOL.ContainsKey(descUser))//判断客户端是否在线
{
WebSocket destSocket = CONNECT_POOL[descUser];//目的客户端
if (destSocket != null && destSocket.State == WebSocketState.Open)
await destSocket.SendAsync(buffer, WebSocketMessageType.Text, true, CancellationToken.None);
}
else
{
Task.Run(() =>
{
if (!MESSAGE_POOL.ContainsKey(descUser))//将用户添加至离线消息池中
MESSAGE_POOL.Add(descUser, new List<MessageInfo>());
MESSAGE_POOL[descUser].Add(new MessageInfo(DateTime.Now, buffer));//添加离线消息
});
}
}
catch (Exception exs)
{
//消息转发异常处理，本次消息忽略继续监听接下来的消息
}
#endregion
}
else
{
break;
}
}//while end
}
catch (Exception ex)
{
//整体异常处理
if (CONNECT_POOL.ContainsKey(user)) CONNECT_POOL.Remove(user);
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
}

复制代码

4.运行看是否报错，若没错将我们的服务器网站发布到IIS（支持WebSocket的IIS上，win7的系统时不可以的）上

点击“生成”->"发布........",以文件系统的方式发布，目标位置为我们创建的IIS网站对应的物理路径