import (
	"github.com/thinkeridea/go-extend/exnet"
	"net"
	"net/http"
)

// RemoteIp 返回远程客户端的 IP，如 192.168.1.1
func RemoteIp(req *http.Request) string { 
	remoteAddr := req.RemoteAddr
	if ip := exnet.ClientPublicIP(req); ip != "" { 
		remoteAddr = ip
	} else if ip := exnet.ClientIP(req); ip != "" { 
		remoteAddr = ip
	} else if ip := req.Header.Get("X-Real-IP"); ip != "" { 
		remoteAddr = ip
	} else if ip = req.Header.Get("X-Forwarded-For"); ip != "" { 
		remoteAddr = ip
	} else { 
		remoteAddr, _, _ = net.SplitHostPort(remoteAddr)
	}

	if remoteAddr == "::1" { 
		remoteAddr = "127.0.0.1"
	}

	return remoteAddr
}