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ip.go
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ip.go
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package gorequest
import (
"net"
"net/http"
"strings"
)
// ClientIp 尽最大努力实现获取客户端 IP 的算法。
// 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。
func ClientIp(r *http.Request) string {
// CloudFlare
CfConnectingIp := strings.TrimSpace(r.Header.Get("Cf-Connecting-Ip"))
if CfConnectingIp != "" {
return CfConnectingIp
}
// 转发IP
xForwardedFor := strings.TrimSpace(strings.Split(r.Header.Get("X-Forwarded-For"), ",")[0])
if xForwardedFor != "" {
return xForwardedFor
}
// 真实Ip
XRealIp := strings.TrimSpace(r.Header.Get("X-Real-Ip"))
if XRealIp != "" {
return XRealIp
}
// HTTP客户端IP
HttpClientIp := strings.TrimSpace(strings.Split(r.Header.Get("HTTP_CLIENT_IP"), ",")[0])
if HttpClientIp != "" {
return HttpClientIp
}
// HTTP转发IP
HttpXForwardedFor := strings.TrimSpace(strings.Split(r.Header.Get("HTTP_X_FORWARDED_FOR"), ",")[0])
if HttpXForwardedFor != "" {
return HttpXForwardedFor
}
// 系统
ip, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr))
if err == nil {
return ip
}
return ""
}