55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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package request // import "miniflux.app/v2/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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// FindClientIP returns the client real IP address based on trusted Reverse-Proxy HTTP headers.
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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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return FindRemoteIP(r)
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}
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// FindRemoteIP returns remote client IP address.
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func FindRemoteIP(r *http.Request) string {
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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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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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