H5WebSocket消息推送

@{
ViewBag.Title = "Home Page";
}

@*HTML5 WebSocket
WebSocket是HTML5开始提供的一种在单个 TCP 连接上进行全双工通讯的协议。
在WebSocket API中，浏览器和服务器只需要做一个握手的动作，然后，浏览器和服务器之间就形成了一条快速通道。两者之间就直接可以数据互相传送。
浏览器通过 JavaScript 向服务器发出建立 WebSocket 连接的请求，连接建立以后，客户端和服务器端就可以通过 TCP 连接直接交换数据。
当你获取 Web Socket 连接后，你可以通过 send() 方法来向服务器发送数据，并通过 onmessage 事件来接收服务器返回的数据。
以下 API 用于创建 WebSocket 对象。
var Socket = new WebSocket(url, [protocol] );*@

<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script type="text/javascript">

var ws;
$().ready(function () {
$('#conn').click(function () {
ws = new WebSocket('ws://' + window.location.hostname + ':' + window.location.port + '/Home/Demo');
$('#tips').text('正在连接');
ws.onopen = function () {
$('#tips').text('已经连接');
}
ws.onmessage = function (evt) {
$('#tips').text(evt.data);
}
ws.onerror = function (evt) {
$('#tips').text(JSON.stringify(evt));
}
ws.onclose = function () {
$('#tips').text('已经关闭');
}
});

$('#close').click(function () {
ws.close();
});

$('#send').click(function () {
if (ws.readyState == WebSocket.OPEN) {
ws.send($('#content').val());
}
else {
$('#tips').text('连接已经关闭');
}
});

});
</script>
<br/>

<div class="row">

<form id="form1" runat="server">
<div>

<input id="conn" type="button" value="连接" />
<input id="close" type="button" value="关闭" />
<span id="tips"></span>
<input id="content" type="text" />
<input id="send" type="button" value="发送" />
</div>
</form>

</div>

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.Mvc;
using System.Web.WebSockets;

namespace H5WebSocket.Controllers
{
public class HomeController : Controller
{
WebSocket socket = null;
public ActionResult Index()
{
return View();
}

public ActionResult About()
{
ViewBag.Message = "Your application description page.";

return View();
}

public ActionResult Contact()
{
ViewBag.Message = "Your contact page.";

return View();
}

public void Demo() {
//return "Hello World";
HttpContextBase content = this.HttpContext;
content.AcceptWebSocketRequest(ProcessChat);
//return "I am a beautiful girl";
}

public String onMessage(String message)
{
while (true)
{
var buffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")));
socket.SendAsync(buffer, WebSocketMessageType.Text, true, CancellationToken.None);
}
}

private async Task ProcessChat(AspNetWebSocketContext context)
{
//HttpContextBase  content = this.HttpContext;
socket = context.WebSocket;
while (true)
{
if (socket.State == WebSocketState.Open)
{
ArraySegment<byte> buffer = new ArraySegment<byte>(new byte[2048]);
WebSocketReceiveResult result = await socket.ReceiveAsync(buffer, CancellationToken.None);

while (true) {
Thread.Sleep(100);
string userMsg = Encoding.UTF8.GetString(buffer.Array, 0, result.Count);
userMsg = "你发送了：" + DateTime.Now.ToLongTimeString() + "于" + DateTime.Now.ToLongTimeString();
buffer = new ArraySegment<byte>(Encoding.UTF8.GetBytes(userMsg));
await socket.SendAsync(buffer, WebSocketMessageType.Text, true, CancellationToken.None);
}

}
else
{
break;
}
}
}
}
}