reverse-proxy-server.js

const net = require("net");
const server = net.createServer();

server.on("connection", (clientToProxySocket) => {
    //console.log("Client connected to proxy");
    clientToProxySocket.once("data", (data) => {
        let isTLSConnection = data.toString().indexOf("CONNECT") !== -1;

        let serverPort = 8008;
        let serverAddress = '127.0.0.1';

        // Creating a connection from proxy to destination server
        const proxyToServerSocket = net.createConnection(
            {
                host: serverAddress,
                port: serverPort,
            },
            () => {
            //    console.log("Proxy to server set up");
            }
        );


        if (isTLSConnection) {
            clientToProxySocket.write("HTTP/1.1 200 OK\r\n\r\n");
        } else {
            proxyToServerSocket.write(data);
        }

        clientToProxySocket.pipe(proxyToServerSocket);
        proxyToServerSocket.pipe(clientToProxySocket);

	proxyToServerSocket.on('close', () => {
	  //console.log('server closed connection');
	});

	clientToProxySocket.on('close', () => {
	  try {
            proxyToServerSocket.destroy();
	  }
	  catch {}
	  //console.log('client closed connection');
	});

        proxyToServerSocket.on("error", (err) => {
            if (err.code.toString().trim() === 'ECONNRESET') return;
            if (err.code.toString().trim() === 'ECONNREFUSED') return;
            console.log("Proxy to server error");
            console.log(err);
        });

        clientToProxySocket.on("error", (err) => {
            if (err.code.toString().trim() === 'ECONNRESET') return;
	    if (err.code.toString().trim() === 'ECONNREFUSED') return;

	    console.log("Client to proxy error");
            console.log(err)
        });
    });
});

server.on("error", (err) => {
    console.log("Some internal server error occurred");
    console.log(err.message);
});

server.on("close", () => {
    //console.log("Client disconnected");
});

server.listen(
    {
        host: "0.0.0.0",
        port: 80,
    },
    () => {
        console.log("Server listening on 0.0.0.0:80");
    }
);