feat(添加功能): client作为本地查询工具，server作为服务给其他服务调用

server/server.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"github.com/xiaoqidun/qqwry"
+	"github.com/xiaoqidun/qqwry/assets"
+	"net"
+	"net/http"
+)
+
+type resp struct {
+	IP   string `json:"ip"`
+	Err  string `json:"err"`
+	City string `json:"city"`
+	Area string `json:"area"`
+}
+
+func init() {
+	qqwry.LoadData(assets.QQWryDat)
+}
+
+func main() {
+	listen := flag.String("listen", "127.0.0.1:80", "http server listen addr")
+	flag.Parse()
+	http.HandleFunc("/ip/", IpAPI)
+	if err := http.ListenAndServe(*listen, nil); err != nil {
+		panic(err)
+	}
+}
+
+func IpAPI(writer http.ResponseWriter, request *http.Request) {
+	ip := request.URL.Path[4:]
+	if ip == "" {
+		ip, _, _ = net.SplitHostPort(request.RemoteAddr)
+	}
+	rw := &resp{IP: ip}
+	city, area, err := qqwry.QueryIP(ip)
+	if err != nil {
+		rw.Err = err.Error()
+	} else {
+		rw.City = city
+		rw.Area = area
+	}
+	b, _ := json.MarshalIndent(rw, "", "    ")
+	_, _ = writer.Write(b)
+}