This is the source code of the freegeoip software. It contains both the web server that empowers freegeoip.net, and a package for the Go programming language that enables any web server to support IP geolocation with a simple and clean API.
See http://en.wikipedia.org/wiki/Geolocation for details about geolocation.
The freegeoip web server is a standalone program that serves an HTTP API for searching the geolocation of IP addresses. To serve the API, it uses an IP database that is automatically downloaded and auto-updated from the internet when the server is running.
The API returns data encoded in popular formats such as CSV, XML, JSON and JSONP.
If you're not a developer and is only looking for the web server, you can download binaries directly.
See https://github.com/fiorix/freegeoip/releases for tarballs for your platform.
Run the server:
Wait for it to download the IP database file for the first time. It does
it in background and writes a message to the console when ready. If you'd
like to use an alternative database source, see the
-db command line
If the server is queried when there is no database available, including this initial first run, it returns HTTP 503 (Service Unavailable), since it can't service requests before a proper database is in place.
You can use any HTTP client to test the server. The examples below use curl and the environment variable $freegeoip, which must be set to the address of your server, like http://localhost:8080 for example:
Querying the API is very straightforward: you just have to pick a format of your choice and provide either the IP address or hostname that you'd like to search for. The syntax is as follows:
curl -i $freegeoip/csv/220.127.116.11 curl -i $freegeoip/xml/18.104.22.168 curl -i $freegeoip/json/github.com
If a domain or hostname is passed in the URL, the server will resolve that name to its IP address and lookup the IP instead. If the hostname contains multiple IPs associated to it, the server picks one randomly, which means it could be either IPv4 or IPv6.
If no IP or hostname is provided, then the server queries the IP address of the HTTP client.
curl -i $freegeoip/json/ (this queries your own IP address)
The JSON endpoint also supports JSONP, by adding a
to the request query.
curl -i $freegeoip/json/22.214.171.124?callback=f
See http://en.wikipedia.org/wiki/JSONP for details on how JSONP works.
Build the docker image:
docker build -t my/freegeoip .
If you want just the API, not the front-end, edit the Dockerfile and
comment out the
-public command line flag.
Or use the official image:
docker run -d --name freegeoip -p 8080:8080 fiorix/freegeoip
If you need quota then link the container to a Redis container:
docker run -d --name redis -p 6379:6379 dockerfile/redis docker run -d --name freegeoip --link redis:redis -p 8080:8080 fiorix/freegeoip -redis redis:6379 -quota-max 10000
You can use
redis-cli monitor to assure things are working as expected.
freegeoip package for Go
The freegeoip package for the Go programming language provides two APIs:
- A database API that requires zero maintenance of the IP database;
- A geolocation
http.Handlerthat can be used/served by any http server.
tl;dr if all you want is code then see the
Otherwise check out the godoc reference.
- Zero maintenance
The DB object alone can download an IP database file from the internet and service lookups to your program right away. It will auto-update the file in background and always magically work.
- DevOps friendly
If you do care about the database and have the commercial version of the MaxMind database, you can update the database file with your program running and the DB object will load it in background. You can focus on your stuff.
Besides the database part, the package provides an
that you can add to your HTTP server to service IP geolocation lookups with
the same simplistic API of freegeoip.net. There's also an interface for
crafting your own HTTP responses encoded in any format.
Install the package:
go get github.com/fiorix/freegeoip
Install the web server:
go get github.com/fiorix/freegeoip/cmd/freegeoip
Test coverage is quite good and may help you find the stuff you need.