51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
// Copyright 2018 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package request // import "miniflux.app/http/request"
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import (
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"net"
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"net/http"
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"strings"
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)
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func dropIPv6zone(address string) string {
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i := strings.IndexByte(address, '%')
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if i != -1 {
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address = address[:i]
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}
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return address
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}
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// FindClientIP returns client real IP address.
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func FindClientIP(r *http.Request) string {
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headers := []string{"X-Forwarded-For", "X-Real-Ip"}
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for _, header := range headers {
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value := r.Header.Get(header)
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if value != "" {
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addresses := strings.Split(value, ",")
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address := strings.TrimSpace(addresses[0])
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address = dropIPv6zone(address)
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if net.ParseIP(address) != nil {
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return address
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}
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}
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}
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// Fallback to TCP/IP source IP address.
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remoteIP, _, err := net.SplitHostPort(r.RemoteAddr)
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if err != nil {
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remoteIP = r.RemoteAddr
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}
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remoteIP = dropIPv6zone(remoteIP)
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// When listening on a Unix socket, RemoteAddr is empty.
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if remoteIP == "" {
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remoteIP = "127.0.0.1"
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}
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return remoteIP
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}
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