// RemoteIP finds IP Address given http.Request struct.
func RemoteIP(ipLookups []string, r engine.Request) string {
realIP := r.Header().Get("X-Real-IP")
forwardedFor := r.Header().Get("X-Forwarded-For")
for _, lookup := range ipLookups {
if lookup == "RemoteAddr" {
return ipAddrFromRemoteAddr(r.RemoteAddress())
}
if lookup == "X-Forwarded-For" && forwardedFor != "" {
// X-Forwarded-For is potentially a list of addresses separated with ","
parts := strings.Split(forwardedFor, ",")
for i, p := range parts {
parts[i] = strings.TrimSpace(p)
}
return parts[0]
}
if lookup == "X-Real-IP" && realIP != "" {
return realIP
}
}
return ""
}
