这篇文章主要为大家展示了“Asp.Net Core中WebSocket绑定的示例分析”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“Asp.Net Core中WebSocket绑定的示例分析”这篇文章吧。
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说明
Websocket是html5后的产物，对于asp.net core中也得到了支持，Asp.Net Core中WebScoket的操作使用基本上和Asp.net中相同，不同的是，绑定监听。
Asp.Net Core2.0默认已经支持WebSocket，不需要另外安装Nuget包。
通过对HttpContext中的WebSockets.AcceptWebSocketAsync方法，接受WebSocket请求；并返回WebScoket对象。
下面话不多说了，来一起看看详细的介绍吧。
一、示例1,
1.后台启动文件Startup的configure中绑定WebSocket的路由监听
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IServiceProvider svp)
{
......
//绑定WebSocket
app.Map("/wsone/Connect", (con) =>
{
con.UseWebSockets();
WSHanleTwo _two = new WSHanleTwo();
con.Use(_two.Connect);
});
}2.定义请求处理类
using System.Net.WebSockets;
using System.Threading;
using System.Threading.Tasks;
namespace Core_Razor_2
{
public class WSHanleTwo
{
private WebSocket socket = null;
//创建链接
public async Task Connect(HttpContext context, Func n)
{
try
{
//执行接收
WebSocket socket = await context.WebSockets.AcceptWebSocketAsync();
this.socket = socket;
//执行监听
await EchoLoop();
}
catch (Exception ex)
{
throw ex;
}
}
///
/// 响应处理
///
///
async Task EchoLoop()
{
var buffer = new byte[1024];
var seg = new ArraySegment(buffer);
while (this.socket.State == WebSocketState.Open)
{
var incoming = await this.socket.ReceiveAsync(seg, CancellationToken.None);
byte[] backInfo = System.Text.UTF8Encoding.Default.GetBytes("服务端相应内容");
var outgoing = new ArraySegment(backInfo, 0, incoming.Count);
await this.socket.SendAsync(outgoing, WebSocketMessageType.Text, true, CancellationToken.None);
}
}
}
}3.前台请求代码
var socket;
//var uri = "ws://" + window.location.host + "/ws";
var uri = "ws://" + window.location.host + "@Url.Action("Connect")";
var output;
var text = "test echo";
function write(s) {
var p = document.createElement("p");
p.innerHTML = s;
output.appendChild(p);
}
function doConnect() {
socket = new WebSocket(uri);
socket.onopen = function (e) { write("opened " + uri); doSend(); };
socket.onclose = function (e) { write("closed"); };
socket.onmessage = function (e) { write("Received: " + e.data); socket.close(); };
socket.onerror = function (e) { write("Error: " + e.data); };
}
function doSend() {
write("Sending: " + text);
socket.send(text);
}
function onInit() {
output = document.getElementById("output");
doConnect();
}
window.onload = onInit;二、为了简单绑定，可以这样封装
public class SocketHandler
{
public const int BufferSize = 4096;
WebSocket socket;
SocketHandler(WebSocket socket)
{
this.socket = socket;
}
async Task EchoLoop()
{
var buffer = new byte[BufferSize];
var seg = new ArraySegment(buffer);
while (this.socket.State == WebSocketState.Open)
{
var incoming = await this.socket.ReceiveAsync(seg, CancellationToken.None);
var outgoing = new ArraySegment(buffer, 0, incoming.Count);
await this.socket.SendAsync(outgoing, WebSocketMessageType.Text, true, CancellationToken.None);
}
}
static async Task Acceptor(HttpContext hc, Func n)
{
if (!hc.WebSockets.IsWebSocketRequest)
return;
var socket = await hc.WebSockets.AcceptWebSocketAsync();
var h = new SocketHandler(socket);
await h.EchoLoop();
}
///
/// 路由绑定处理
///
///
public static void Map(IApplicationBuilder app)
{
app.UseWebSockets();
app.Use(SocketHandler.Acceptor);
}
}路由绑定：
[csharp] view plain copy
//绑定websocket
app.Map("/ws", SocketHandler.Map);以上是“Asp.Net Core中WebSocket绑定的示例分析”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
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