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<Task> 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;
}
}
/// <summary> /// 响应处理 /// </summary> /// <returns></returns> async Task EchoLoop() {
var buffer = new byte[1024];
var seg = new ArraySegment<byte>(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<byte>(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<byte>(buffer);
while (this.socket.State == WebSocketState.Open) {
var incoming = await this.socket.ReceiveAsync(seg, CancellationToken.None);
var outgoing = new ArraySegment<byte>(buffer, 0, incoming.Count);
await this.socket.SendAsync(outgoing, WebSocketMessageType.Text, true, CancellationToken.None);
}
}
static async Task Acceptor(HttpContext hc, Func<Task> n) {
if (!hc.WebSockets.IsWebSocketRequest) return;
var socket = await hc.WebSockets.AcceptWebSocketAsync();
var h = new SocketHandler(socket);
await h.EchoLoop();
}
/// <summary> /// 路由绑定处理 /// </summary> /// <param name="app"></param> 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);
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总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对脚本之家的支持。
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