9157226e7b
The RemoteAddr and RemoteIP functions operate on *http.Request values, not contexts. They have very low cohesion with the rest of the package. Signed-off-by: Cory Snider <csnider@mirantis.com>
51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
package requestutil
|
|
|
|
import (
|
|
"net"
|
|
"net/http"
|
|
"strings"
|
|
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
func parseIP(ipStr string) net.IP {
|
|
ip := net.ParseIP(ipStr)
|
|
if ip == nil {
|
|
log.Warnf("invalid remote IP address: %q", ipStr)
|
|
}
|
|
return ip
|
|
}
|
|
|
|
// RemoteAddr extracts the remote address of the request, taking into
|
|
// account proxy headers.
|
|
func RemoteAddr(r *http.Request) string {
|
|
if prior := r.Header.Get("X-Forwarded-For"); prior != "" {
|
|
remoteAddr, _, _ := strings.Cut(prior, ",")
|
|
remoteAddr = strings.Trim(remoteAddr, " ")
|
|
if parseIP(remoteAddr) != nil {
|
|
return remoteAddr
|
|
}
|
|
}
|
|
// X-Real-Ip is less supported, but worth checking in the
|
|
// absence of X-Forwarded-For
|
|
if realIP := r.Header.Get("X-Real-Ip"); realIP != "" {
|
|
if parseIP(realIP) != nil {
|
|
return realIP
|
|
}
|
|
}
|
|
|
|
return r.RemoteAddr
|
|
}
|
|
|
|
// RemoteIP extracts the remote IP of the request, taking into
|
|
// account proxy headers.
|
|
func RemoteIP(r *http.Request) string {
|
|
addr := RemoteAddr(r)
|
|
|
|
// Try parsing it as "IP:port"
|
|
if ip, _, err := net.SplitHostPort(addr); err == nil {
|
|
return ip
|
|
}
|
|
|
|
return addr
|
|
}
|