Print array in node js server-CodePudding

Hi I have a website from witch I can send a message to node js server and there the message is saved in a a array. When a new message is sent to the server the old message in the array is overwritten by the new message. The array has to contain new and old messages. The output of console after sending message

const http = require('http');
const { Socket } = require('socket.io');
const WebSocketServer = require('websocket').server;
var steviloSporocil = 0;
const sporocila=[];

const server = http.createServer();
console.log('Server is on port 3000')
server.listen(3000);

const wsServer = new WebSocketServer({
    httpServer: server
});

wsServer.on('request', function(request) {
    const connection = request.accept(null, request.origin);

    connection.on('message', function(message) {
        sporocila[steviloSporocil]=[message.utf8Data];
        steviloSporocil  ;
        for (let i = 0; i < steviloSporocil; i  ) {
            connection.sendUTF(sporocila[i]);
            console.log('Received Message:', sporocila[i]);
        }

    });

    connection.on('close', function(reasonCode, description) {
        console.log('Client has disconnected.');
    });
});

<?php ob_start() ?>
    <?php $titel="Chat"; ?>

    <div  id="text"></div>

    <form name='form' method='post' >
        <div >
            <input type="text"  id="textbox" name="chat" placeholder="Chat">
            <button type="button"  name="gumb" id="gumb" onclick="Poslji()" autocomplete="off">Send</button>
        </div>
        </form>
        <script>
            function Poslji(){
                const ws = new WebSocket('ws://localhost:3000'); 
                ws.onopen = function() {
                    console.log('WebSocket Client Connected');
                    ws.send(document.getElementById('textbox').value);
                };
            
                ws.onmessage = function(e) {
                    console.log("Received: '"   e.data   "'");
                    document.getElementById('text').innerHTML=e.data;
                };   
            }
    </script>
<?php 
    $content=ob_get_clean();
    require "layout.html.php";
?>

CodePudding user response：

If I understood everything, here how to solve your problem: you take all previous message at the specified index and add the new one at the end. If you want to add it at the top, then just invert the two lines.

sporocila[steviloSporocil] = [
  ...sporocila[steviloSporocil],
  message.utf8Data
];

CodePudding user response：

You are sending the messages in the array to the client separately using a for-loop and connection.sendUTF(sporocila[i]); and then displaying the last message received using document.getElementById('text').innerHTML=e.data;.

Are you suprised then that your website only shows the last item in the array?

Why not send the entire array using JSON.stringify and then JSON.parse on the client?