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detect-port

1.3.0 • Public • Published

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Node.js implementation of port detector

Usage

$ npm i detect-port --save
const detect = require('detect-port');
 
/**
 * callback usage
 */
 
detect(port, (err, _port) => {
  if (err) {
    console.log(err);
  }
 
  if (port == _port) {
    console.log(`port: ${port} was not occupied`);
  } else {
    console.log(`port: ${port} was occupied, try port: ${_port}`);
  }
});
 
/**
 * for a yield syntax instead of callback function implement
 */
 
const co = require('co');
 
co(function *() {
  const _port = yield detect(port);
 
  if (port == _port) {
    console.log(`port: ${port} was not occupied`);
  } else {
    console.log(`port: ${port} was occupied, try port: ${_port}`);
  }
});
 
/**
 * use as a promise
 */
 
detect(port)
  .then(_port => {
    if (port == _port) {
      console.log(`port: ${port} was not occupied`);
    } else {
      console.log(`port: ${port} was occupied, try port: ${_port}`);
    }
  })
  .catch(err => {
    console.log(err);
  });
 

Command Line Tool

$ npm i detect-port -g

Quick Start

# get an available port randomly 
$ detect
 
# detect pointed port 
$ detect 80
 
# output verbose log 
$ detect --verbose
 
# more help 
$ detect --help

FAQ

Most likely network error, check that your /etc/hosts and make sure the content below:

127.0.0.1       localhost
255.255.255.255 broadcasthost
::1             localhost

Contributors


xudafeng


fengmk2


ziczhu


gaearon


popomore


jsw0528

This project follows the git-contributor spec, auto upated at Tue Aug 14 2018 12:43:52 GMT+0800.

License

MIT

Keywords

install

npm i detect-port

Downloadsweekly downloads

1,207,770

version

1.3.0

license

MIT

homepage

github.com

repository

Gitgithub

last publish

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