29 lines
425 B
JavaScript
29 lines
425 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 = isResolvable;
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isResolvable.async = true;
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/**
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* Tries to resolve the hostname. Returns true if succeeds.
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*
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* @param {String} host is the hostname from the URL.
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* @return {Boolean}
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*/
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function isResolvable (host, fn) {
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var family = 4;
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dns.lookup(host, family, function (err, ip) {
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fn(null, !err);
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});
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}
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