feat: add func GetRequestPublicIp and IsInternalIP (#40)

* add: add func GetRequestPublicIp and IsInternalIP

* fix: fix test fileutil fail

Co-authored-by: zhanghu <305835360@qq.com>

netutil/net_test.go

@@ -2,6 +2,7 @@ package netutil
 
 import (
 	"net"
+	"net/http"
 	"testing"
 
 	"github.com/duke-git/lancet/v2/internal"
@@ -15,6 +16,30 @@ func TestGetInternalIp(t *testing.T) {
 	assert.IsNotNil(ip)
 }
 
+func TestGetRequestPublicIp(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGetPublicIpInfo")
+
+	ip := "36.112.24.10"
+
+	request := http.Request{
+		Method: "GET",
+		Header: http.Header{
+			"X-Forwarded-For": {ip},
+		},
+	}
+	publicIp := GetRequestPublicIp(&request)
+	assert.Equal(publicIp, ip)
+
+	request = http.Request{
+		Method: "GET",
+		Header: http.Header{
+			"X-Real-Ip": {ip},
+		},
+	}
+	publicIp = GetRequestPublicIp(&request)
+	assert.Equal(publicIp, ip)
+}
+
 func TestGetPublicIpInfo(t *testing.T) {
 	assert := internal.NewAssert(t, "TestGetPublicIpInfo")
 
@@ -43,6 +68,25 @@ func TestIsPublicIP(t *testing.T) {
 	}
 }
 
+func TestIsInternalIP(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIsInternalIP")
+
+	ips := []net.IP{
+		net.ParseIP("127.0.0.1"),
+		net.ParseIP("192.168.0.1"),
+		net.ParseIP("10.91.210.131"),
+		net.ParseIP("172.20.16.1"),
+		net.ParseIP("36.112.24.10"),
+	}
+
+	expected := []bool{true, true, true, true, false}
+
+	for i := 0; i < len(ips); i++ {
+		actual := IsInternalIP(ips[i])
+		assert.Equal(expected[i], actual)
+	}
+}
+
 func TestGetIps(t *testing.T) {
 	ips := GetIps()
 	t.Log(ips)