chore: 更新geox时通过内存存储

config/updateGeo.go

@@ -6,77 +6,75 @@ import (
 	_ "github.com/Dreamacro/clash/component/geodata/standard"
 	C "github.com/Dreamacro/clash/constant"
 	"github.com/oschwald/geoip2-golang"
-	"os"
+	"io/ioutil"
+	"net/http"
 	"runtime"
 )
 
 func UpdateGeoDatabases() error {
-	var (
-		tmpMMDB    = C.Path.Resolve("temp_country.mmdb")
-		tmpGepIP   = C.Path.Resolve("temp_geoip.dat")
-		tmpGeoSite = C.Path.Resolve("temp_geosite.dat")
-	)
-
-	if C.GeodataMode {
-		if err := downloadGeoIP(tmpGepIP); err != nil {
-			return fmt.Errorf("can't download GeoIP database file: %w", err)
-		}
-
-		if err := verifyGeoSite("temp_geoip.dat"); err != nil {
-			_ = os.Remove(tmpGepIP)
-			return fmt.Errorf("invalid GeoIP database file: %s", err)
-		}
-
-		if err := os.Rename(tmpGepIP, C.Path.GeoIP()); err != nil {
-			return fmt.Errorf("can't rename MMDB database file: %w", err)
-		}
-
-	} else {
-		if err := downloadMMDB(tmpMMDB); err != nil {
-			return fmt.Errorf("can't download MMDB database file: %w", err)
-		}
-
-		if err := verifyMMDB("temp_country.mmdb"); err != nil {
-			_ = os.Remove(tmpMMDB)
-			return fmt.Errorf("invalid MMDB database file: %s", 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("temp_geosite.dat"); err != nil {
-		_ = os.Remove(tmpGeoSite)
-		return fmt.Errorf("invalid GeoSite database file: %s", err)
-	}
-
-	if err := os.Rename(tmpGeoSite, C.Path.GeoSite()); err != nil {
-		return fmt.Errorf("can't rename GeoSite database file: %w", err)
-	}
-	runtime.GC()
-	return nil
-}
-
-func verifyMMDB(path string) error {
-	instance, err := geoip2.Open(path)
-	if err == nil {
-		_ = instance.Close()
-	}
-	return err
-}
-
-func verifyGeoSite(path string) error {
+	defer runtime.GC()
 	geoLoader, err := geodata.GetGeoDataLoader("standard")
 	if err != nil {
 		return err
 	}
 
-	_, err = geoLoader.LoadSite(path, "cn")
+	if C.GeodataMode {
+		data, err := downloadForBytes(C.GeoIpUrl)
+		if err != nil {
+			return fmt.Errorf("can't download GeoIP database file: %w", err)
+		}
 
-	return err
+		if _, err = geoLoader.LoadIPByBytes(data, "cn"); err != nil {
+			return fmt.Errorf("invalid GeoIP database file: %s", err)
+		}
+
+		if saveFile(data, C.Path.GeoIP()) != nil {
+			return fmt.Errorf("can't save GeoIP database file: %w", err)
+		}
+
+	} else {
+		data, err := downloadForBytes(C.MmdbUrl)
+		if err != nil {
+			return fmt.Errorf("can't download MMDB database file: %w", err)
+		}
+
+		instance, err := geoip2.FromBytes(data)
+		if err != nil {
+			return fmt.Errorf("invalid MMDB database file: %s", err)
+		}
+		_ = instance.Close()
+
+		if saveFile(data, C.Path.MMDB()) != nil {
+			return fmt.Errorf("can't save MMDB database file: %w", err)
+		}
+	}
+
+	data, err := downloadForBytes(C.GeoSiteUrl)
+	if err != nil {
+		return fmt.Errorf("can't download GeoSite database file: %w", err)
+	}
+
+	if _, err = geoLoader.LoadSiteByBytes(data, "cn"); err != nil {
+		return fmt.Errorf("invalid GeoSite database file: %s", err)
+	}
+
+	if saveFile(data, C.Path.GeoSite()) != nil {
+		return fmt.Errorf("can't save GeoSite database file: %w", err)
+	}
+
+	return nil
+}
+
+func downloadForBytes(url string) ([]byte, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	return ioutil.ReadAll(resp.Body)
+}
+
+func saveFile(bytes []byte, path string) error {
+	return ioutil.WriteFile(path, bytes, 0o644)
 }