get-fqdn
Lookup the fully qualified domain name ("FQDN") of the current server's IP (default) or a custom IP. 90x faster than
hostname -fand works with Node v6.4+.
Table of Contents
Install
npm:
npm install get-fqdnyarn:
yarn add get-fqdnUsage
const getFQDN = require('get-fqdn');
// async/await usage
(async () => {
try {
const fqdn = await getFQDN();
console.log('fqdn', fqdn);
} catch (err) {
console.error(err);
}
});
// then/catch usage
getFQDN().then(fqdn => console.log('fqdn', fqdn)).catch(console.error);
// callback usage
getFQDN((err, fqdn) => {
if (err) return console.error(err);
console.log('fqdn', fqdn);
});Note that you can also pass a custom IP:
const fqdn = await getFQDN('1.1.1.1');
console.log('fqdn', fqdn);Performance
This package runs approximately 90x faster than the alternative of using hostname -f. It was built to ensure that my project ForwardEmail.net is as optimized as possible. No other NPM packages existed that were similar, as all the others were written in CoffeeScript, used deasync, or used the hostname -f approach (also see the fqdn package that uses the wrong approach too!).
Test #1: uses native
osanddnspackage:
const os = require('os');
const dns = require('dns');
console.time('native nodejs dns lookup');
dns.lookup(os.hostname(), { hints: dns.ADDRCONFIG }, (err, ip) => {
if (err) throw err;
dns.lookupService(ip, 0, (err, fqdn) => {
if (err) throw err;
console.timeEnd('native nodejs dns lookup');
console.log('fqdn', fqdn);
process.exit(0);
});
});deploy@mx1:~/test$ node test1.js
native nodejs dns lookup: 1.603ms
fqdn mx1.forwardemail.netTest #2: uses
shelljsandhostname -f:
deploy@mx1:~/test$ node test2.js
fqdn mx1.forwardemail.net
shelljs with hostname -f: 88.311msContributors
| Name | Website |
|---|---|
| Nick Baugh | http://niftylettuce.com/ |
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