Unity中新建場景
建UI（UGUI）
有一個連接按鈕Button
一個信息輸入框InputField
一個發送按鈕Button
一個斷開按鈕Button
一個消息顯示框Text

場景中建一個GameObject，在上面加個腳本，就叫WSMgr好了
用到了BestHTTP這個插件

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BestHTTP;
using BestHTTP.WebSocket;
using System;
using BestHTTP.Examples;
using UnityEngine.UI;
using System.Text;

public class WSMgr : MonoBehaviour {

    //public string url = "ws://localhost:8080/web1/websocket";
    public string url = "ws://localhost:8080/web1/ws";
    public InputField msg;
    public Text console;

    private WebSocket webSocket;

    private void Start()
    {
        init();
    }

    private void init()
    {
        webSocket = new WebSocket(new Uri(url));
        webSocket.OnOpen += OnOpen;
        webSocket.OnMessage += OnMessageReceived;
        webSocket.OnError += OnError;
        webSocket.OnClosed += OnClosed;
    }

    private void antiInit()
    {
        webSocket.OnOpen = null;
        webSocket.OnMessage = null;
        webSocket.OnError = null;
        webSocket.OnClosed = null;
        webSocket = null;
    }

    private void setConsoleMsg(string msg)
    {
        console.text = "Message: " + msg;
    }

    public void Connect()
    {
        webSocket.Open();
    }

    private byte[] getBytes(string message)
    {

        byte[] buffer = Encoding.Default.GetBytes(message);
        return buffer;
    }

    public void Send()
    {
        webSocket.Send(msg.text);
    }

    public void Send(string str)
    {
        webSocket.Send(str);
    }

    public void Close()
    {
        webSocket.Close();
    }

    #region WebSocket Event Handlers

    /// <summary>
    /// Called when the web socket is open, and we are ready to send and receive data
    /// </summary>
    void OnOpen(WebSocket ws)
    {
        Debug.Log("connected");
        setConsoleMsg("Connected");
    }

    /// <summary>
    /// Called when we received a text message from the server
    /// </summary>
    void OnMessageReceived(WebSocket ws, string message)
    {
        Debug.Log(message);
        setConsoleMsg(message);
    }

    /// <summary>
    /// Called when the web socket closed
    /// </summary>
    void OnClosed(WebSocket ws, UInt16 code, string message)
    {
        Debug.Log(message);
        setConsoleMsg(message);
        antiInit();
        init();
    }

    private void OnDestroy()
    {
        if(webSocket!=null && webSocket.IsOpen)
        {
            webSocket.Close();
            antiInit();
        }
    }

    /// <summary>
    /// Called when an error occured on client side
    /// </summary>
    void OnError(WebSocket ws, Exception ex)
    {
        string errorMsg = string.Empty;
#if !UNITY_WEBGL || UNITY_EDITOR
        if (ws.InternalRequest.Response != null)
            errorMsg = string.Format("Status Code from Server: {0} and Message: {1}", ws.InternalRequest.Response.StatusCode, ws.InternalRequest.Response.Message);
#endif
        Debug.Log(errorMsg);
        setConsoleMsg(errorMsg);
        antiInit();
        init();
    }

    #endregion
}
 

Connect Send Close 三個方法對應的就是三個按鈕的功能
OnOpen OnMessage OnError OnClose這四個一看就是Websocket的四個事件對應的方法

首先在Start方法中init()
點擊Connect，連接

在輸入框中輸入，點擊Send就發送

點擊Close斷開連接

底部的Text中會顯示消息

同樣，Tomcat服務端也有顯示

發布WebGL測試可用

Unity中Websocket的簡單使用