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main.go
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main.go
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package main
import (
"log"
"net"
"os"
"github.com/maxmind/mmdbwriter"
"github.com/maxmind/mmdbwriter/inserter"
"github.com/maxmind/mmdbwriter/mmdbtype"
)
func main() {
// Load the database we wish to enrich.
writer, err := mmdbwriter.Load("GeoLite2-Country.mmdb", mmdbwriter.Options{})
if err != nil {
log.Fatal(err)
}
// Define and insert the new data.
_, sreNet, err := net.ParseCIDR("56.0.0.0/16")
if err != nil {
log.Fatal(err)
}
sreData := mmdbtype.Map{
"AcmeCorp.DeptName": mmdbtype.String("SRE"),
"AcmeCorp.Environments": mmdbtype.Slice{
mmdbtype.String("development"),
mmdbtype.String("staging"),
mmdbtype.String("production"),
},
}
if err := writer.InsertFunc(sreNet, inserter.TopLevelMergeWith(sreData)); err != nil {
log.Fatal(err)
}
_, devNet, err := net.ParseCIDR("56.1.0.0/16")
if err != nil {
log.Fatal(err)
}
devData := mmdbtype.Map{
"AcmeCorp.DeptName": mmdbtype.String("Development"),
"AcmeCorp.Environments": mmdbtype.Slice{
mmdbtype.String("development"),
mmdbtype.String("staging"),
},
}
if err := writer.InsertFunc(devNet, inserter.TopLevelMergeWith(devData)); err != nil {
log.Fatal(err)
}
_, mgmtNet, err := net.ParseCIDR("56.2.0.0/16")
if err != nil {
log.Fatal(err)
}
mgmtData := mmdbtype.Map{
"AcmeCorp.DeptName": mmdbtype.String("Management"),
"AcmeCorp.Environments": mmdbtype.Slice{
mmdbtype.String("development"),
mmdbtype.String("staging"),
},
}
if err := writer.InsertFunc(mgmtNet, inserter.TopLevelMergeWith(mgmtData)); err != nil {
log.Fatal(err)
}
// Write the newly enriched DB to the filesystem.
fh, err := os.Create("GeoLite2-Country-with-Department-Data.mmdb")
if err != nil {
log.Fatal(err)
}
_, err = writer.WriteTo(fh)
if err != nil {
log.Fatal(err)
}
}