feat: geo ip.

geoip/geolite/geolite.go

@@ -0,0 +1,73 @@
+package geolite
+
+import (
+	"errors"
+	"net"
+
+	"github.com/go-kratos/kratos/v2/log"
+	"github.com/oschwald/geoip2-golang"
+	"github.com/tx7do/kratos-utils/geoip/geolite/assets"
+)
+
+type Result struct {
+	Country  string // 国家
+	Province string // 省
+	City     string // 城市
+}
+
+const defaultOutputLanguage = "zh-CN"
+
+// Client 地理位置解析结构体
+type Client struct {
+	db             *geoip2.Reader
+	outputLanguage string
+}
+
+// NewClient .
+func NewClient() (*Client, error) {
+	db, err := geoip2.FromBytes(assets.GeoLite2CityData)
+	if err != nil {
+		return nil, err
+	}
+	return &Client{db: db, outputLanguage: defaultOutputLanguage}, nil
+}
+
+// Close 关闭客户端
+func (g *Client) Close() error {
+	if g.db == nil {
+		return nil
+	}
+	return g.db.Close()
+}
+
+// SetLanguage 设置输出的语言，默认为：zh-CN
+func (g *Client) SetLanguage(code string) {
+	g.outputLanguage = code
+}
+
+// query 查询城市级别数据
+func (g *Client) query(rawIP string) (city *geoip2.City, err error) {
+	ip := net.ParseIP(rawIP)
+	if ip == nil {
+		return nil, errors.New("invalid ip")
+	}
+
+	return g.db.City(ip)
+}
+
+// Query 通过IP获取地区
+func (g *Client) Query(rawIP string) (ret Result, err error) {
+	record, err := g.query(rawIP)
+	if err != nil {
+		log.Fatal(err)
+		return ret, err
+	}
+
+	ret.Country = record.Country.Names[g.outputLanguage]
+	if len(record.Subdivisions) > 0 {
+		ret.Province = record.Subdivisions[0].Names[g.outputLanguage]
+	}
+	ret.City = record.City.Names[g.outputLanguage]
+
+	return
+}