Grails GeoIP (MaxMind) Integration

Usage:

1) You must configure 2 properties in your Config.groovy:

• Path to your Maxmind database file. You can get a free Lite version here: http://www.maxmind.com/app/geolitecity. You must define one of the following:
• geoip.data.path = "/opt/geoip/GeoLiteCity.dat" - The path to the database on the file system ]
• geoip.data.resource= "/WEB-INF/GeoLiteCity.dat" - The path to the database, which is bundled as a resource in the war file ]
• geoip.data.cache - There are 4 possible values for this:
• 0 - GEOIP_STANDARD
• 1 - GEOIP_MEMORY_CACHE
• 2 - GEOIP_CHECK_CACHE
• 4 - GEOIP_INDEX_CACHE

Note that when you're using the cached versions it will load the database in memory. Its size is usually around 45 MB.

class MyController {
        def geoIpService
        def index = {
            def location = geoIpService.getLocation("88.158.9.150")
            render location.countryName + " " + location.city
        }
    }

Here is a list of the location's fields.

Note that some may not be properly populated if the information is missing.

• countryCode
• countryName
• region
• regionName
• city
• postalCode
• timezone
• latitude
• longitude
• dmaCode
• areaCode
• metroCode

A: Here is what I think:

• You can sell your customers very detailed statistics regarding the viewers of their products
• You can implement a very good targeted ad engine (customers can choose to display their commercials only for German people located in region 5 for example)
• If you're building a map driven application, you can position your users on their home area