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package gorequest
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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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// ClientIp 尽最大努力实现获取客户端 IP 的算法。
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// 解析 X-Real-IP 和 X-Forwarded-For 以便于反向代理(nginx 或 haproxy)可以正常工作。
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func ClientIp(r *http.Request) string {
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// 转发IP
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xForwardedFor := r.Header.Get("X-Forwarded-For")
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ip := strings.TrimSpace(strings.Split(xForwardedFor, ",")[0])
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if ip != "" {
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return ip
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}
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// 真实Ip
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ip = strings.TrimSpace(r.Header.Get("X-Real-Ip"))
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if ip != "" {
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return ip
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}
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// HTTP客户端IP
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httpClientIp := r.Header.Get("HTTP_CLIENT_IP")
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ip = strings.TrimSpace(strings.Split(httpClientIp, ",")[0])
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if ip != "" {
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return ip
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}
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// HTTP转发IP
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HttpXForwardedFor := r.Header.Get("HTTP_X_FORWARDED_FOR")
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ip = strings.TrimSpace(strings.Split(HttpXForwardedFor, ",")[0])
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if ip != "" {
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return ip
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}
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// 系统
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if ip, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr)); err == nil {
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return ip
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}
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return ""
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}
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