73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
|
package limiter
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net"
|
||
|
|
"net/http"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
// DefaultIPv4Mask defines the default IPv4 mask used to obtain user IP.
|
||
|
|
DefaultIPv4Mask = net.CIDRMask(32, 32)
|
||
|
|
// DefaultIPv6Mask defines the default IPv6 mask used to obtain user IP.
|
||
|
|
DefaultIPv6Mask = net.CIDRMask(128, 128)
|
||
|
|
)
|
||
|
|
|
||
|
|
// GetIP returns IP address from request.
|
||
|
|
func (limiter *Limiter) GetIP(r *http.Request) net.IP {
|
||
|
|
return GetIP(r, limiter.Options)
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetIPWithMask returns IP address from request by applying a mask.
|
||
|
|
func (limiter *Limiter) GetIPWithMask(r *http.Request) net.IP {
|
||
|
|
return GetIPWithMask(r, limiter.Options)
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetIPKey extracts IP from request and returns hashed IP to use as store key.
|
||
|
|
func (limiter *Limiter) GetIPKey(r *http.Request) string {
|
||
|
|
return limiter.GetIPWithMask(r).String()
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetIP returns IP address from request.
|
||
|
|
// If options is defined and TrustForwardHeader is true, it will lookup IP in
|
||
|
|
// X-Forwarded-For and X-Real-IP headers.
|
||
|
|
func GetIP(r *http.Request, options ...Options) net.IP {
|
||
|
|
if len(options) >= 1 && options[0].TrustForwardHeader {
|
||
|
|
ip := r.Header.Get("X-Forwarded-For")
|
||
|
|
if ip != "" {
|
||
|
|
parts := strings.SplitN(ip, ",", 2)
|
||
|
|
part := strings.TrimSpace(parts[0])
|
||
|
|
return net.ParseIP(part)
|
||
|
|
}
|
||
|
|
|
||
|
|
ip = strings.TrimSpace(r.Header.Get("X-Real-IP"))
|
||
|
|
if ip != "" {
|
||
|
|
return net.ParseIP(ip)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
remoteAddr := strings.TrimSpace(r.RemoteAddr)
|
||
|
|
host, _, err := net.SplitHostPort(remoteAddr)
|
||
|
|
if err != nil {
|
||
|
|
return net.ParseIP(remoteAddr)
|
||
|
|
}
|
||
|
|
|
||
|
|
return net.ParseIP(host)
|
||
|
|
}
|
||
|
|
|
||
|
|
// GetIPWithMask returns IP address from request by applying a mask.
|
||
|
|
func GetIPWithMask(r *http.Request, options ...Options) net.IP {
|
||
|
|
if len(options) == 0 {
|
||
|
|
return GetIP(r)
|
||
|
|
}
|
||
|
|
|
||
|
|
ip := GetIP(r, options[0])
|
||
|
|
if ip.To4() != nil {
|
||
|
|
return ip.Mask(options[0].IPv4Mask)
|
||
|
|
}
|
||
|
|
if ip.To16() != nil {
|
||
|
|
return ip.Mask(options[0].IPv6Mask)
|
||
|
|
}
|
||
|
|
return ip
|
||
|
|
}
|