This is the Go implementation of the Maxmind GeoIP API. It is incomplete and work in progress the initial goal is support only two of the database types – the City Lite and Country Lite. The only supported method is loading the full db on startup into memory (memory cache).

• In Memory (Load(string))

• Country Edition (dbType=1)
• City Edition REV 0 (dbType=6)
• City Edition REV 1 (dbType=2)

• By IP Address (GetLocationByIP(string))
• By IP Number (GetLocationByIPNum(uint32))

• CountryCode string (available in all databases)
• CountryName string (available in all databases)
• City string
• Region string
• PostalCode string
• Latitude float32
• Longitude float32

• Implement better error handling (report the error on load and lookups)
• Better returns, country edition has only code and name (perhaps use interfaces)
• Add test cases and benchmarking
• Add support for more database formats

make (See Makefile for more details)

./example DBFILE IPADDRESS (i.e. ./example GeoIP.dat 1.1.1.1)

Please see example.go for a complete example of how to use this library.