websocket练习

html代码

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <title>WebSocket DEMO</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <style>
        ul,
        li {
            padding: 0;
            margin: 0;
            list-style: none;
        }
    </style>
</head>
<body>
    <div>
        a:<input type="text" id="inpA" /> b:<input type="text" id="inpB" />
        <button type="button" id="btnSub">submit</button>
    </div>
    <ul id="outCnt"></ul>
    <script>
      let wsc;
      var echo = function(text) {
        var echoone = function(text) {
          var dom = document.createElement("li");
          var t = document.createTextNode(text);
          dom.appendChild(t);
          var cnt = document.getElementById("outCnt");
          cnt.appendChild(dom);
        };
        if (Array.isArray(text)) {
          text.map(function(t) {
            echoone(t);
          });
        } else {
          echoone(text);
        }
      };
      (function() {
        if ("WebSocket" in window) {
          // init the websocket client
          wsc = new WebSocket("ws://localhost:6690/add");
          wsc.onopen = function() {
            echo("connected");
          };
          wsc.onclose = function() {
            echo("closed");
          };
          wsc.onmessage = function(e) {
            var data = JSON.parse(e.data);
            echo(data.msg || e.data);
            console.log(data.msg || e.data);
          };

          // define click event for submit button
          document.getElementById("btnSub").addEventListener('click', function() {
            var a = parseInt(document.getElementById("inpA").value);
            var b = parseInt(document.getElementById("inpB").value);
            if (wsc.readyState == 1) {
              wsc.send(JSON.stringify({ a: a, b: b }));
            } else {
              echo("service is not available");
            }
          });
        }
      })();
    </script>
</body>
</html>

服务端代码

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WebSocketSharp;
using WebSocketSharp.Server;

namespace ConsoleServer
{
   public class Add : WebSocketBehavior
    {

        protected override void OnOpen()
        {
            Console.WriteLine("Connection Open");
            base.OnOpen();
        }
        protected override void OnMessage(MessageEventArgs e)
        {
            var data = e.Data;
            if (TestJson(data))
            {
                var param = JToken.Parse(data);
                if (param["a"] != null && param["b"] != null)
                {
                    var a = param["a"].ToObject<int>();
                    var b = param["b"].ToObject<int>();
                    Send(JsonConvert.SerializeObject(new { code = 200, msg = "result is " + (a + b) }));
                    Task.Factory.StartNew(() => {
                        Task.Delay(10000).Wait();
                        Send(JsonConvert.SerializeObject(new { code = 200, msg = "I just to tell you, the connection is different from http, i still alive and could send message to you." }));
                    });
                }
            }
            else
            {
                Send(JsonConvert.SerializeObject(new { code = 400, msg = "request is not a json string." }));
            }
        }

        protected override void OnClose(CloseEventArgs e)
        {
            Console.WriteLine("Connection Closed");
            base.OnClose(e);
        }

        protected override void OnError(ErrorEventArgs e)
        {
            Console.WriteLine("Error: " + e.Message);
            base.OnError(e);
        }

        private static bool TestJson(string json)
        {
            try
            {
                JToken.Parse(json);
                return true;
            }
            catch (JsonReaderException ex)
            {
                Console.WriteLine(ex);
                return false;
            }
        }
    }
}

Program启动项代码

 var wssv = new WebSocketServer(6690);
            wssv.AddWebSocketService<Add>("/add");
            wssv.Start();
            Console.WriteLine("Server starting, press any key to terminate the server.");
            Console.ReadKey(true);
            wssv.Stop();

注意引用 Newtonsoft.JSON和DSharpPlus.WebSocket.WebSocketSharp

package代码

  Install-Package DSharpPlus.WebSocket.WebSocketSharp 

  Install-Package Newtonsoft.JSON

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