[MM-56348] system/ping: add new method with options (#26079)

server/channels/api4/system.go

@@ -179,6 +179,7 @@ func getSystemPing(c *Context, w http.ResponseWriter, r *http.Request) {
 		s[filestoreStatusKey] = model.StatusOk
 		appErr := c.App.TestFileStoreConnection()
 		if appErr != nil {
+			c.Logger.Warn("Unable to test filestore connection.", mlog.Err(appErr))
 			s[filestoreStatusKey] = model.StatusUnhealthy
 			s[model.STATUS] = model.StatusUnhealthy
 		}
@@ -194,7 +195,7 @@ func getSystemPing(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	s["ActiveSearchBackend"] = c.App.ActiveSearchBackend()
 
-	if s[model.STATUS] != model.StatusOk {
+	if s[model.STATUS] != model.StatusOk && r.FormValue("use_rest_semantics") != "true" {
 		w.WriteHeader(http.StatusInternalServerError)
 	}
 	w.Write([]byte(model.MapToJSON(s)))