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country.go
54 lines (45 loc) · 925 Bytes
/
country.go
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package router
import (
"context"
"net"
"time"
"github.com/rs/zerolog/log"
)
func (r *Router) localSite(domain string) bool {
// parse domain to IP
ip := net.ParseIP(domain)
if ip == nil {
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
ips, err := net.DefaultResolver.LookupIP(ctx, "ip", domain)
if err != nil || len(ips) == 0 {
log.Warn().Err(err).
Str("domain", domain).
Int("ips", len(ips)).
Msg("resolve domain")
return false
}
ip = ips[0]
}
// CIDR match
for _, cidr := range r.country.cidrs {
if cidr.Contains(ip) {
return true
}
}
// MMDB match CN
if r.country.Reader != nil {
city, err := r.country.City(ip)
if err != nil {
log.Warn().Err(err).
Str("domain", domain).
IPAddr("ip", ip).
Msg("mmdb search")
return false
}
if city.Country.IsoCode == "CN" {
return true
}
}
return false
}