38 lines
638 B
JavaScript
38 lines
638 B
JavaScript
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/**
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* Module dependencies.
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*/
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var dns = require('dns');
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/**
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* Module exports.
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*/
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module.exports = dnsResolve;
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dnsResolve.async = true;
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/**
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* Resolves the given DNS hostname into an IP address, and returns it in the dot
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* separated format as a string.
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*
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* Example:
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*
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* ``` js
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* dnsResolve("home.netscape.com")
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* // returns the string "198.95.249.79".
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* ```
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*
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* @param {String} host hostname to resolve
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* @return {String} resolved IP address
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*/
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function dnsResolve (host, fn) {
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var family = 4;
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dns.lookup(host, family, function (err, ip) {
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if (err) return fn(err);
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fn(null, ip || '127.0.0.1');
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});
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}
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