190.4.67.219 runtime error: index out of range

[vanbroup]

I'm getting the following error with some IP addresses:

190.4.67.219 runtime error: index out of range

/opt/_/src/ip/ip2country.go:32 (0x535a1e)
func.001: debug.PrintStack()
/usr/local/go/src/pkg/runtime/panic.c:229 (0x413581)
/usr/local/go/src/pkg/runtime/panic.c:487 (0x413d23)
/usr/local/go/src/pkg/runtime/panic.c:442 (0x413b55)
/opt/gopkg/src/github.com/nranchev/go-libGeoIP/libgeo.go:223 (0x5a1be1)
com/nranchev/go-libGeoIP.(_GeoIP).GetLocationByIPNum: location.CountryCode = countryCode[offset-countryBegin]
/opt/gopkg/src/github.com/nranchev/go-libGeoIP/libgeo.go:204 (0x5a1a85)
com/nranchev/go-libGeoIP.(GeoIP).GetLocationByIP: return gi.GetLocationByIPNum(AddrToNum(ip))
/opt/_/src/ip/ip2country.go:37 (0x5354a3)
Ip2country: loc := gi.GetLocationByIP(ip.String())
/opt/__/src/***/program.go:171 (0x4617ec)
saveCert: ipcountry := ip.Ip2country(conn.RemoteAddr().(net.TCPAddr).IP)
/opt/******/src/**_****/program.go:142 (0x461622)
queue: doSomething(next)
/usr/local/go/src/pkg/runtime/proc.c:1223 (0x4170e0)

[aurelienb]

I dont know if this is similar, but I also have an index out of range error, what ever is the IP I test

goroutine 15 [running]:
github.com/nranchev/libgeo.(_GeoIP).lookupByIPNum(0xc20018b540, 0x1010
101, 0x0)
/my_path/src/github.com/nranchev/libgeo/libgeo.go:29
4 +0x2c1
github.com/nranchev/libgeo.(_GeoIP).GetLocationByIPNum(0xc20018b540, 0
x1010101, 0x1010101)
/my_path/src/github.com/nranchev/libgeo/libgeo.go:21
0 +0x3b
github.com/nranchev/libgeo.(*GeoIP).GetLocationByIP(0xc20018b540, 0xc2
00189f48, 0x7, 0x0)
/my_path/src/github.com/nranchev/libgeo/libgeo.go:20
4 +0x45

[vanbroup]

@aurellenb Have you downloaded an loaded the correct MaxMind GeoIP database?

[aurelienb]

Yes, and we use it in production.
And when I use another lib (abh/geoip, forked in SoCloz/geoip) it works.

[nranchev]

Which DB are you using? I need to reproduce the error before fixing the bug.

[vanbroup]

GeoLite Country (Binary)
http://dev.maxmind.com/geoip/legacy/geolite/

[ThomasRooney]

As somebody who ran into this issue, this is fixed by using the legacy database as opposed to the newest format. (as above)

For an example of using this take a quick look at my repo: https://github.com/ThomasRooney/GeoIP-echo. It grabs and unzips the relevant database itself using wget and gz.

Thanks @vanbroup