feat: RESTful API support update Geo file

and can set update url by user, eg.
geox-url:
  geoip: "http://xxxx/gepip.dat"
  mmdb: "http://xxxx/country.mmdb"
  geosite: "http://xxxx/geosite.dat"

hub/route/configs.go

@@ -3,6 +3,7 @@ package route
 import (
 	"net/http"
 	"path/filepath"
+	"sync"
 
 	"github.com/Dreamacro/clash/component/resolver"
 	"github.com/Dreamacro/clash/config"
@@ -16,10 +17,16 @@ import (
 	"github.com/go-chi/render"
 )
 
+var (
+	updateGeoMux sync.Mutex
+	updatingGeo  = false
+)
+
 func configRouter() http.Handler {
 	r := chi.NewRouter()
 	r.Get("/", getConfigs)
 	r.Put("/", updateConfigs)
+	r.Post("/geo", updateGeoDatabases)
 	r.Patch("/", patchConfigs)
 	return r
 }
@@ -143,3 +150,42 @@ func updateConfigs(w http.ResponseWriter, r *http.Request) {
 	executor.ApplyConfig(cfg, force)
 	render.NoContent(w, r)
 }
+
+func updateGeoDatabases(w http.ResponseWriter, r *http.Request) {
+	updateGeoMux.Lock()
+
+	if updatingGeo {
+		updateGeoMux.Unlock()
+		render.Status(r, http.StatusBadRequest)
+		render.JSON(w, r, newError("updating..."))
+		return
+	}
+
+	updatingGeo = true
+	updateGeoMux.Unlock()
+
+	go func() {
+		defer func() {
+			updatingGeo = false
+		}()
+
+		log.Warnln("[REST-API] updating GEO databases...")
+
+		if err := config.UpdateGeoDatabases(); err != nil {
+			log.Errorln("[REST-API] update GEO databases failed: %v", err)
+			return
+		}
+
+		cfg, err := executor.ParseWithPath(constant.Path.Config())
+		if err != nil {
+			log.Errorln("[REST-API] update GEO databases failed: %v", err)
+			return
+		}
+
+		log.Warnln("[REST-API] update GEO databases successful, apply config...")
+
+		executor.ApplyConfig(cfg, false)
+	}()
+
+	render.NoContent(w, r)
+}