Throw an error when the port has been used

[mustard-mh]

require('uWebSockets.js').App({}).get('/*', (res, req) => {
    console.log('hi')
    res.writeStatus('200 OK').writeHeader('IsExample', 'Yes').end('Hello there!');
}).listen(3000, (listenSocket) => {
    if (listenSocket) {
        console.log('Listening to port 3000');
    }
})

p1 p2 run $node index.js

all requests send to p1; p2 didn't throw any error

[joshxyzhimself]

• https://unetworking.github.io/uWebSockets.js/generated/enums/ListenOptions.html
• https://unetworking.github.io/uWebSockets.js/generated/interfaces/TemplatedApp.html#listen
• https://github.com/e3dio/uWebSockets.js/blob/master/docs/index.d.ts#L282

const listen_options = { SHARED: 0, EXCLUSIVE: 1 };
app.listen(8080, listen_options.EXCLUSIVE, (token) => {
  if (token) {
    console.log('uws :: listening to 8080..');
  } else {
    throw new Error('uws :: app.listen failed, invalid token');
  }
});

[mustard-mh]

thx ! 😁