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package main
import (
"flag"
"log"
"os"
"github.com/mpolden/echoip/http"
"github.com/mpolden/echoip/iputil"
"github.com/mpolden/echoip/iputil/geo"
)
type multiValueFlag []string
func (f *multiValueFlag) String() string {
vs := ""
for i, v := range *f {
vs += v
if i < len(*f)-1 {
vs += ", "
}
}
return vs
}
func (f *multiValueFlag) Set(v string) error {
*f = append(*f, v)
return nil
}
func main() {
countryFile := flag.String("f", "", "Path to GeoIP country database")
cityFile := flag.String("c", "", "Path to GeoIP city database")
asnFile := flag.String("a", "", "Path to GeoIP ASN database")
listen := flag.String("l", ":8080", "Listening address")
reverseLookup := flag.Bool("r", false, "Perform reverse hostname lookups")
portLookup := flag.Bool("p", false, "Enable port lookup")
template := flag.String("t", "index.html", "Path to template")
cacheSize := flag.Int("C", 0, "Size of response cache. Set to 0 to disable")
var headers multiValueFlag
flag.Var(&headers, "H", "Header to trust for remote IP, if present (e.g. X-Real-IP)")
flag.Parse()
log := log.New(os.Stderr, "echoip: ", 0)
r, err := geo.Open(*countryFile, *cityFile, *asnFile)
if err != nil {
log.Fatal(err)
}
cache := http.NewCache(*cacheSize)
server := http.New(r, cache)
server.IPHeaders = headers
if _, err := os.Stat(*template); err == nil {
server.Template = *template
} else {
log.Printf("Not configuring default handler: Template not found: %s", *template)
}
if *reverseLookup {
log.Println("Enabling reverse lookup")
server.LookupAddr = iputil.LookupAddr
}
if *portLookup {
log.Println("Enabling port lookup")
server.LookupPort = iputil.LookupPort
}
if len(headers) > 0 {
log.Printf("Trusting remote IP from header(s): %s", headers.String())
}
if *cacheSize > 0 {
log.Printf("Cache capacity set to %d", *cacheSize)
}
log.Printf("Listening on http://%s", *listen)
if err := server.ListenAndServe(*listen); err != nil {
log.Fatal(err)
}
}
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