A cacheable dns.lookup(…) that respects the TTL. 

A cacheable dns.lookup(…) that respects TTL

sindresorhus

szmarczak

cacheable-lookup

A cacheable dns.lookup(…) that respects the TTL

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  "description": "A cacheable dns.lookup(…) that respects the TTL",

    "url": "git+https://github.com/szmarczak/cacheable-lookup.git"

    "url": "https://github.com/szmarczak/cacheable-lookup/issues"

  "homepage": "https://github.com/szmarczak/cacheable-lookup#readme",

> A cacheable [`dns.lookup(…)`](https://nodejs.org/api/dns.html#dns_dns_lookup_hostname_options_callback) that respects TTL :tada:

[![Build Status](https://travis-ci.org/szmarczak/cacheable-lookup.svg?branch=master)](https://travis-ci.org/szmarczak/cacheable-lookup)

[![Coverage Status](https://coveralls.io/repos/github/szmarczak/cacheable-lookup/badge.svg?branch=master)](https://coveralls.io/github/szmarczak/cacheable-lookup?branch=master)

[![npm](https://img.shields.io/npm/dm/cacheable-lookup.svg)](https://www.npmjs.com/package/cacheable-lookup)

[![install size](https://packagephobia.now.sh/badge?p=cacheable-lookup)](https://packagephobia.now.sh/result?p=cacheable-lookup)

Making lots of HTTP requests? You can save some time by caching DNS lookups.

Don't worry, this package respects TTL :smiley:

Making lots of HTTP requests? You can save some time by caching DNS lookups :zap:

const CacheableLookup = require('cacheable-lookup');

http.get('https://example.com', {lookup: cacheable.lookup}, response => {

### Attaching CacheableLookup to an Agent

http.get('https://example.com', response => {

Returns a new instance of `CacheableLookup`.

Type: [Keyv adapter instance](https://github.com/lukechilds/keyv)

If set to `0`, it will make a new DNS query each time.

Default: [`new dns.Resolver()`](https://nodejs.org/api/dns.html#dns_class_dns_resolver)

An instance of [DNS Resolver](https://nodejs.org/api/dns.html#dns_class_dns_resolver) used to make DNS queries.

The IP address (can be an IPv4 or IPv6 address).

**Note**: This is not present when using the native `dns.lookup(...)`!

The timestamp (`Date.now() + ttl * 1000`) when the entry expires.

When `options.all` is `false`, then `callback(error, address, family, expires, ttl)` is called.

When `options.all` is `true`, then `callback(error, entries)` is called.

		{
		"name": "cacheable-lookup",
		"version": "2.0.0",
		"version": "2.0.1",
		"description": "A cacheable dns.lookup(…) that respects the TTL",
		@@ -33,3 +33,2 @@ "engines": {
		"devDependencies": {
		"@types/keyv": "^3.1.1",
		"ava": "^3.1.0",
		@@ -44,4 +43,5 @@ "benchmark": "^2.1.4",
		"dependencies": {
		"@types/keyv": "^3.1.1",
		"keyv": "^4.0.0"
		}
		}

		@@ -10,4 +10,3 @@ # cacheable-lookup

		Making lots of HTTP requests? You can save some time by caching DNS lookups.<br>
		Don't worry, this package respects TTL :smiley:
		Making lots of HTTP requests? You can save some time by caching DNS lookups :zap:

		@@ -14,0 +13,0 @@ ## Usage

Improved metrics

Worsened metrics

Dependency changes