mmdb-lib
v2.1.1
Published
Maxmind DB (MMDB) Library
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580,515
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mmdb-lib
Javascript library for working with Maxmind binary databases (aka mmdb or geoip2).
Library is designed to be agnostic to environment and works equally well in node.js and browser. Module is fully compatible with IPv6. There are no differences in API between IPv4 and IPv6.
Installation
npm i mmdb-lib
Usage
import fs from 'fs';
import * as mmdb from 'mmdb-lib';
// Get a buffer with mmdb database, from file system or whereever.
const db = fs.readFileSync('/path/to/GeoLite2-City.mmdb');
const reader = new mmdb.Reader<CityResponse>(db);
console.log(reader.get('66.6.44.4')); // inferred type `CityResponse`
console.log(reader.getWithPrefixLength('66.6.44.4')); // tuple with inferred type `[CityResponse|null, number]`
Supported response types:
- CountryResponse
- CityResponse
- AnonymousIPResponse
- AsnResponse
- ConnectionTypeResponse
- DomainResponse
- IspResponse
Usage in browser-like environments
Library expects to receive an instance of Buffer
during instantiation of Reader
. Since there is no direct alternative of node's Buffer
in browser, you can use https://github.com/feross/buffer that mimics native Buffer
interface. Neither ArrayBuffer
nor Uint8Array
is supported right now. Another requirement is BigInt object available.
Options
Reader(db:Buffer, [options])
options
:<Object>
cache
:<Object>
Cache helper. tiny-lru is great basic option. Only two methods expected:get(key: string | number): any
andset(key: string | number, val: any): void
.
References
- Loosely based on https://github.com/PaddeK/node-maxmind-db
- MaxMind DB file format specification http://maxmind.github.io/MaxMind-DB/
- MaxMind test/sample DB files https://github.com/maxmind/MaxMind-DB
- GeoLite2 Free Downloadable Databases http://dev.maxmind.com/geoip/geoip2/geolite2/
- Great talk about V8 performance https://www.youtube.com/watch?v=UJPdhx5zTaw
- V8 Optimization killers https://github.com/petkaantonov/bluebird/wiki/Optimization-killers
- More V8 performance tips http://www.html5rocks.com/en/tutorials/speed/v8/
License
MIT
Contributing
All contributions are welcome. Please make sure to add tests for your changes.
You need to initialise the repository with the following command:
git submodule update --init --recursive
Then you can run tests with:
npm test