node.js - handling TCP socket error ECONNREFUSED

Question

I\'m using node.js with socket.io to give my web page access to character data served by a TCP socket. I\'m quite new to node.js.

User ---->

Answer 1

The only way I found to fix this is wrapping the net stuff in a domain:

const domain = require('domain');
const net = require('net');

const d = domain.create();

d.on('error', (domainErr) => {
    console.log(domainErr.message);
});

d.run(() => {
    const client = net.createConnection(options, () => {

        client.on('error', (err) => {
            throw err;
        });
        client.write(...);
        client.on('data', (data) => {
            ...
        });
    });
});

The domain error captures error conditions which arise before the net client has been created, such as an invalid host.

See also: https://nodejs.org/api/domain.html