cloud cmd api for platform client

opencv-motion-detect/evcloudsvc.cpp

@@ -568,7 +568,7 @@ private:
         json ret;
         ret["code"] = -1;
         ret["msg"] = "unkown msg";
-        spdlog::info("handle cmd");
+        spdlog::info("evcloudsvc handle cmd: {}", body.dump());
         if(body.count("target") != 0 && body["target"].is_string() && body.count("metaType") !=0  && body["metaType"].is_string() &&
             body.count("data") != 0 && body["data"].is_object() && body.count("metaValue") !=0  && body["metaValue"].is_string()) {
             // it's msg to edge.

opencv-motion-detect/evslicer.cpp

@@ -182,8 +182,8 @@ private:
                         }catch(exception &e) {
                             spdlog::error("evslicer {} exception in handleCloudMsg: {}", selfId, e.what());
                         }
-                    }else{
-                        //
+                    }else if(metaValue == "debug:list_files"){
+                        debugFilesRing();
                     }
                 }
             }