GeoIP binding for nodejs

Get geolocation information based on domain or IP address.

##Important Notification

From v0.4.0, geoip will be bind to libgeoip >= 1.4.7, which is a C library, the api also has been changed.

###Technical Architecture

###Memory leak issue As up to the version 0.4.7 (commit 22dadd98646f75318412b54b3de90cc079d34b1d), there will be some memory leak when new a object from GeoIP class.

Here is the report, I'll update it frequently.

Fortunately, the number of leaked bytes is not huge, and you wont new a object very offen.

If you are willing to fix this but, please fork this project.

###Dependency

####libgeoip C library

If your os has a system package manager (e.g, on linux, apt of ubuntu, yum of fedora, pacman of arch. MacPorts and homebrew on OSX),

then, there is a very high possibility that there is alreay a geoip c library package inside the repository.

If not, you can build for yourself:

wget http://geolite.maxmind.com/download/geoip/api/c/GeoIP-1.4.7.tar.gz
tar -xvzf GeoIP-1.4.7.tar.gz
cd GeoIP-1.4.7
./configure --prefix=/usr
make
sudo make install

#####Dependency Policy

GeoIP takes the so call 'two steps' dependency policy, which means the minimal version of libgeoip is always the previous release of the latest one.

For example, currently(April 2012) latest release of libgeoip is 1.4.8, so the minimal dependency will be the previous release, which is 1.4.7, and so on.

##Data

Befor you can use this package, you need to download or buy some data from www.maxmind.com.

There are some free databases among some commercial versions, the free databases can be found here.

##Installation

for nodejs 0.8.x

[sudo] npm install geoip [-g]

for nodejs 0.6.x

[sudo] npm install geoip@0.4.5 [-g]

for nodejs 0.4.x

[sudo] npm install geoip@0.4.4 [-g]

for nodejs older than 0.4.0

From v0.4.0, geoip need nodejs >= 0.4.0, if you want to use it on old nodejs, you can:

npm install geoip@0.3.4-1

##Usage

###Check edition

var edition = geoip.check('/path/to/file');

console.log(edition); // output 'country', 'city', 'org'... so on

###Create a new instance of sub-module, for example:

var city = new geoip.City('/path/to/GeoLiteCity.dat', false);  // not to cache the database

var city = new geoip.City('/path/to/GeoLiteCity.dat');  // the default option is cache

###Update database on the fly:

city.update('/path/to/new/GeoLiteCity.dat');

##Modules

###Country

ipv4 address lookup

// Open the country data file
var Country = geoip.Country;

var country = new Country('/path/to/GeoIP.dat');

// Synchronous method(the recommended way):
var country_obj = country.lookupSync('8.8.8.8');

console.log(country_obj);
/*
  { country_code: 'US',
    country_code3: 'USA',
    country_name: 'United States',
    continent_code: 'NA'
  }
*/

// Asynchronous method:
country.lookup('www.google.com', function(err, data) {
    if (err) {throw err;}
    if (data) { // if not found, just return null
        console.log(data);  // same as lookup method
    }
});

ipv6 address lookup (Currently only Country and City module supports ipv6)

// Open the ipv6 edition of country module
var Country6 = geoip.Country6;

var country_v6 = new Country6('/path/to/GeoIPv6.dat');

// Synchronous method
var country_obj_v6 = country_v6.lookupSync('2607:f0d0:1002:0051:0000:0000:0000:0004');

console.log(country_obj_v6); // Same as ipv4
/*
  { country_code: 'US',
    country_code3: 'USA',
    country_name: 'United States',
    continent_code: 'NA'
  }
*/

// Asynchronous method
country_v6.lookup('2400:2352:b0f1:36c5:aa9d:694a:2f98:40bd', function(err, data_v6) {
    if (err) {throw err;}
    if (data_v6) {
        console.log(data_v6);
        /*
         {
           country_code: 'JP',
           country_code3: 'JPN',
           country_name: 'Japan',
           continent_code: 'AS'
          }

        */
    }
});

###City

ipv4 address lookup

// Open the GeoLiteCity.dat file first.
var City = geoip.City;
var city = new City('/path/to/GeoLiteCity.dat');

Synchronous method:

  var city_obj = city.lookupSync('8.8.8.8');
  console.log(city_obj);
  /*
  Return an object of city information
  {
   "country_code":"US",
   "country_code3":"USA",
   "country_name":"United States",
   "continet_code":"NA",
   "region":"CA",
   "city":"Mountain View",
   "postal_code":"94043",
   "latitude":37.41919999999999,
   "longitude":-122.0574,
   "dma_code":807,
   "metro_code":807,
   "area_code":650
   }
   */

Asynchronous method:

  city.lookup('www.google.com', function(err, data) {
    if (err) {throw err;}
    if (data) {
        console.log(data);
    }
  });

ipv6 address lookup

// Open the GeoLiteCityv6.dat file first.
var City6 = geoip.City6;
var city6 = new City6('/path/to/GeoLiteCityv6.dat');

Synchronous method:

  var city6_obj = city6.lookupSync('2002:7679:b9af:db9b:ab51:501a:db4e:2d');
  console.log(city6_obj);
  /*
  {
   country_code: 'CN',
   country_code3: 'CHN',
   country_name: 'China',
   region: '32',
   city: 'Chengdu',
   latitude: 30.66670036315918,
   longitude: 104.06670379638672,
   continent_code: 'AS'
  }
  */

Asynchronous method:

  city6.lookup('2002:c6aa:2dc8:b719:4314:2a7d:e31c:fe73', function(err, data) {
    if (err) {throw err;}
    if (data) {
        console.log(data);
        /* As expected ,return an object that contains city information
        {
         country_code: 'US',
         country_code3: 'USA',
         country_name: 'United States',
         region: 'CO',
         city: 'Englewood',
         postal_code: '80112',
         latitude: 39.569000244140625,
         longitude: -104.85820007324219,
         continent_code: 'NA'
        }
        */
      }
  });

###Organization

var Org = geoip.Org;
var org = new Org('/path/to/file')  // Org module can open three edition database 'org', 'asnum', 'isp'

Synchronous method:

var org_str = org.lookupSync('8.8.8.8');

console.log(org_str);
/*
  The type of returned data is string, for example:

  'Genuity'
  'AS15169 Google Inc.'

  no longer an object
*/

Asynchronous method:

org.lookup('www.google.com', function(err, data) {
    if (err) {throw err;}
    if (data) {
        console.log(data);
    }
});

###Region

var Region = geoip.Region;
var region = new Region('/path/to/GeoIPRegion.dat');

Synchronous method:

var region_obj = region.lookupSync('8.8.8.8');

console.log('region_obj);
/*
  region object has two properties:
  { country_code: 'US', region: 'CO' }

*/

Asynchronous method:

region.lookup('www.google.com', function(err, data) {
    if (err) {throw err;}
    if (data) {
      console.log(data);
    }
});

###NetSpeed

var NetSpeed = geoip.NetSpeed;
var netspeed = new NetSpeed('/path/to/GeoIPNetSpeed.dat');

Synchronous method:

var netspeed_str = netspeed.lookupSync('8.8.8.8');

console.log(netspeed_str);
/*
  netspeed_str just a simple string, 'Dialup', 'Corprate'... so on
*/

Asynchronous method:

netspeed.lookup('www.google.com', function(err, data) {
    if (err) {throw err;}
    if (data) {
      console.log(data);  // Maybe return 'unknow' or different from lookup method
    }
});