WebSocket.cs for Unity Tutorial (http://auycro.github.io/blog/2015/09/02/implement-websocket-unity-webgl-javascript-plugin2/)

WebSocket.cs

//Copyright (c) 2015 Gumpanat Keardkeawfa
//Licensed under the MIT license

//Websocket C# for UnityWebgl
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;

public class WebSocket : MonoBehaviour {

	#region WebSocketJSLib Implement
	Queue<string> recvList = new Queue<string> (); //keep receive messages

	[DllImport("__Internal")]
	private static extern void Hello(); //test javascript plugin

	[DllImport("__Internal")]
	private static extern void InitWebSocket(string url); //create websocket connection

	[DllImport("__Internal")]
	private static extern int State(); //check websocket state

	[DllImport("__Internal")]
	private static extern void Send(string message); //send message

	[DllImport("__Internal")]
	private static extern void Close(); //close websocket connection

  //For Receive Message, this function was call by plugin, we need to keep this name.
	void RecvString(string message){
		recvList.Enqueue (message);   //We will put the new message to the recvList queue.
	}
 
  //For Receive Message, this function was call by plugin, we need to keep this name.
	void ErrorString(string message){
		//We can do the same as RecvString here.
	}
	#endregion

	void Start () {
		Hello ();        //We start with testing plugin
		StartCoroutine("RecvEvent");    //Then run the receive message loop
	}
	
	//Receive message loop function
	IEnumerator RecvEvent(){
		int j = 0;
		InitWebSocket ("ws://echo.websocket.org/"); //First we create the connection.
		while (true) {
			if (recvList.Count > 0) {         //When our message queue has string coming.
				Dispatch(recvList.Dequeue());    //We will dequeue message and send to Dispatch function.
			}
			yield return null;
		}
	}
	
	//You can implement your game method here :)
	void Dispatch(string msg) {
		string[] splits = msg.Split(' ') ;
		switch (splits[0]) {
		case "turn" :
			//DO SOMETHING
			Debug.LogWarning("Turn "+splits[1]);
			break;
		default :
			Debug.Log("Distpatch : "+msg);
			break;
		}
	}

  //For UI, we defined it here
	void OnGUI() {
		if (GUI.Button(new Rect(10, 10, 150, 30), "Helllo,World"))
			Send("Helllo, World");
			
		if (GUI.Button(new Rect(10, 60, 150, 30), "Turn Right"))
			Send("turn r");
			
		if (GUI.Button(new Rect(10, 110, 150, 30), "Turn Left"))
			Send("turn l");
	}
}