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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package request // import "miniflux.app/v2/internal/http/request"
import (
"net"
"net/http"
"strings"
)
// FindClientIP returns the client real IP address based on trusted Reverse-Proxy HTTP headers.
func FindClientIP(r *http.Request) string {
headers := []string{"X-Forwarded-For", "X-Real-Ip"}
for _, header := range headers {
value := r.Header.Get(header)
if value != "" {
addresses := strings.Split(value, ",")
address := strings.TrimSpace(addresses[0])
address = dropIPv6zone(address)
if net.ParseIP(address) != nil {
return address
}
}
}
// Fallback to TCP/IP source IP address.
return FindRemoteIP(r)
}
// FindRemoteIP returns remote client IP address without considering HTTP headers.
func FindRemoteIP(r *http.Request) string {
remoteIP, _, err := net.SplitHostPort(r.RemoteAddr)
if err != nil {
remoteIP = r.RemoteAddr
}
return dropIPv6zone(remoteIP)
}
func dropIPv6zone(address string) string {
i := strings.IndexByte(address, '%')
if i != -1 {
address = address[:i]
}
return address
}
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