Api: add cache reset (evcc-io#18941)

Author: andig

server/http.go

@@ -301,6 +301,7 @@ func (s *HTTPd) RegisterSystemHandler(valueChan chan<- util.Param, cache *util.P
 		routes := map[string]route{
 			"log":      {"GET", "/log", logHandler},
 			"logareas": {"GET", "/log/areas", logAreasHandler},
+			"reset":    {"POST", "/reset", resetHandler},
 			"shutdown": {"POST", "/shutdown", func(w http.ResponseWriter, r *http.Request) {
 				shutdown()
 				w.WriteHeader(http.StatusNoContent)

server/http_site_handler.go

@@ -292,6 +292,11 @@ func logAreasHandler(w http.ResponseWriter, r *http.Request) {
 	jsonResult(w, logstash.Areas())
 }
 
+func resetHandler(w http.ResponseWriter, r *http.Request) {
+	util.ResetCached()
+	jsonResult(w, "OK")
+}
+
 func logHandler(w http.ResponseWriter, r *http.Request) {
 	a := r.URL.Query()["area"]
 	l := logstash.LogLevelToThreshold(r.URL.Query().Get("level"))