Observe when something in your node app starts listening on a TCP port
npm install on-net-listenObserve when something in your node app starts listening on a TCP port.
``
npm install on-net-listen
Uses async_hooks behind the scenes and requires Node >=9
` js
var onnetlisten = require('on-net-listen')
onnetlisten(function (addr) {
// addr is the same object as server.address()
// for the port do addr.port
console.log('Someone started listening:', addr)
})
var http = require('http')
var server = http.createServer(function () {
// ...
})
server.listen(0) // will trigger the above listener
`
#### var emitter = onnetlisten(onlistening)
Start listening for when TCP servers start listening.
The returned event emitter emits listening when that happens
with the address object for the tcp server that started listening.
To stop the listener do emitter.destroy()`
Credit to @andreasmadsen for writing most of this module and being an async_hooks wizard
This project was kindly sponsored by nearForm.
MIT