@sagi.io/maxmind/index.js

IP lookup using Maxmind databases

'use strict';

var assert = require('assert');
var fs = require('fs');
var Reader = require('./lib/reader');
var ip = require('./lib/ip');
var isGzip = require('./lib/is-gzip');
var utils = require('./lib/utils');

exports.Reader = Reader;

exports.open = function(filepath, opts, cb) {
  if (!cb) cb = opts;
  assert.equal(typeof cb, 'function', 'Callback function must be provided. \
    If you want to open library synchronously, use maxmind.openSync function.');

  fs.readFile(filepath, function(err, database) {
    if (err) return cb(err);
    if (isGzip(database)) {
      return cb(new Error('Looks like you are passing in a file in gzip format, please use mmdb database instead.'));
    }

    try {
      var reader = new Reader(database, opts);
    } catch (err) {
      cb(err);
      return;
    }

    if (opts && !!opts.watchForUpdates) {
      if (opts.watchForUpdatesHook && typeof opts.watchForUpdatesHook != 'function') {
        throw new Error('opts.watchForUpdatesHook should be a function');
      }
      var watcherOptions = {persistent: opts.watchForUpdatesNonPersistent !== true};
      fs.watch(filepath, watcherOptions, function() {
        fs.readFile(filepath, function(err, database) {
          if (err) return cb(err);
          reader.load(database, opts);
        });
        if (opts.watchForUpdatesHook) {
          opts.watchForUpdatesHook();
        }
      });
    }
    cb(null, reader);
  });
};

exports.openSync = function(filepath, opts) {
  var reader = new Reader(fs.readFileSync(filepath), opts);
  if (opts && !!opts.watchForUpdates) {
    if (opts.watchForUpdatesHook && typeof opts.watchForUpdatesHook != 'function') {
      throw new Error('opts.watchForUpdatesHook should be a function');
    }
    var watcherOptions = {persistent: opts.watchForUpdatesNonPersistent !== true};
    fs.watch(filepath, watcherOptions, function() {
      reader.load(fs.readFileSync(filepath), opts);
      if (opts.watchForUpdatesHook) {
        opts.watchForUpdatesHook();
      }
    });
  }

  return reader;
};

exports.init = function() {
  throw new Error(utils.legacyErrorMessage);
};

exports.validate = ip.validate;