如何为websocket连接握手指定URL？

Question

I'm trying to use websocket with php and js. I referred to many online resources to understand how the connection is established. But I just can't understand how to specify the url.

I learnt from one of the resources I referref to, that URL is the server that I want to connect to.

My site structure now is this:

root/test/test.js

in the test.js , my code to make connection is this:

jQuery(document).ready(function($) {
 WebSocketTest();
  function WebSocketTest()
         {
            if ("WebSocket" in window)
            {
               alert("WebSocket is supported by your Browser!");

               // Let us open a web socket
               var ws = new WebSocket("ws://mysite.localhost.com");

               ws.onopen = function()
               {
                  // Web Socket is connected, send data using send()
                  ws.send("Message to send");
                  alert("Message is sent...");
               };

               ws.onmessage = function (evt) 
               { 
                  var received_msg = evt.data;
                  alert("Message is received...");
               };

               ws.onclose = function()
               { 
                  // websocket is closed.
                  alert("Connection is closed..."); 
               };
            }

            else
            {
               // The browser doesn't support WebSocket
               alert("WebSocket NOT supported by your Browser!");
            }
         }

 }
});

When I run the above code, it says..

1) websocket is supported by your browser

2) connection is closed...

3) in the console, WebSocket connection to 'ws://mysite.localhost.com/' failed: Error during WebSocket handshake: Unexpected response code: 200

Please explain to me only how to establish connection and to which file or server. Thanks in advance...

here.. https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_client_applications

this is the URL given for example.Can someone explain what that /socketserver means

var exampleSocket = new WebSocket("ws://www.example.com/socketserver", "protocolOne");

Connection is made, if connected to ws://echo.websocket.org/ , but I'm not clear on this concept..

Answer 1

Websocket requires you to create a endpoint on server side to etablish the connection.

But i can only see the js part of your code here, did you ever made a server endpoint for your websocket connection?

In "ws://www.example.com/socketserver" , the socketServer means the name of websocket server endpoint.

So you need to do something in server side to make it work.