Feature: add update GEO databases to rest api

config/updateGeo.go

@@ -0,0 +1,69 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"runtime"
+
+	"github.com/Dreamacro/clash/component/geodata"
+	_ "github.com/Dreamacro/clash/component/geodata/standard"
+	C "github.com/Dreamacro/clash/constant"
+
+	"github.com/oschwald/geoip2-golang"
+)
+
+func UpdateGeoDatabases() error {
+	var (
+		tmpMMDB    = C.Path.Resolve("temp_country.mmdb")
+		tmpGeoSite = C.Path.Resolve("temp_geosite.dat")
+	)
+
+	if err := downloadMMDB(tmpMMDB); err != nil {
+		return fmt.Errorf("can't download MMDB database file: %w", err)
+	}
+
+	if err := verifyMMDB(tmpMMDB); err != nil {
+		_ = os.Remove(tmpMMDB)
+		return fmt.Errorf("invalid MMDB database file, %w", err)
+	}
+
+	if err := os.Rename(tmpMMDB, C.Path.MMDB()); err != nil {
+		return fmt.Errorf("can't rename MMDB database file: %w", err)
+	}
+
+	if err := downloadGeoSite(tmpGeoSite); err != nil {
+		return fmt.Errorf("can't download GeoSite database file: %w", err)
+	}
+
+	if err := verifyGeoSite(tmpGeoSite); err != nil {
+		_ = os.Remove(tmpGeoSite)
+		return fmt.Errorf("invalid GeoSite database file, %w", err)
+	}
+
+	if err := os.Rename(tmpGeoSite, C.Path.GeoSite()); err != nil {
+		return fmt.Errorf("can't rename GeoSite database file: %w", err)
+	}
+
+	return nil
+}
+
+func verifyMMDB(path string) error {
+	instance, err := geoip2.Open(path)
+	if err == nil {
+		_ = instance.Close()
+	}
+	return err
+}
+
+func verifyGeoSite(path string) error {
+	geoLoader, err := geodata.GetGeoDataLoader("standard")
+	if err != nil {
+		return err
+	}
+
+	_, err = geoLoader.LoadSite(path, "cn")
+
+	runtime.GC()
+
+	return err
+}