I needed to lookup geolocation info for a list of IPs, and came upon IP
Location Lite. You will need to
download the latest IP2LOCATION-LITE-DB11.BIN file (DB11.LITE, IPv4 Database,
BIN format).
I haven't made any pretty command-line flags or anything either. It reads stdin and writes csv to stdout. Running this:
cat << EOF | go run main.go
8.8.8.8
4.4.4.4
EOF
should return:
ip,country_short,country_long,region,city,latitude,longitude
8.8.8.8,US,United States of America,California,Mountain View,37.405991,-122.078514
4.4.4.4,US,United States of America,Minnesota,Minneapolis,44.979969,-93.263840
What you'll more likely do in practice is
cat some-ips.txt | go run main.go > some-ips-with-geo.csv