try-net-connect

I use this in my startup scripts executed in Docker containers so that I can wait for another container's server to be ready before starting the dependent server.

Install

npm install try-net-connect

Usage

const tryConnect = require('try-net-connect')
 
tryConnect({
  host: process.env.HOST,
  port: process.env.PORT
}).on('connected', win)
  .on('retry', tryToWin)
  .on('timeout', feelBad)

tryConnect(options)

See node's net.connect parameters for connection options.

• options: object
  • retry: number, 1000 ms to wait before retrying connection
  • retries: number, null (infinite) number of retries
• returns: eventEmitter
  • .on('connected', client => {})
  • .on('retry', reason => {})
  • .on('timeout', mainReason => {})
  • stop: function stop retrying