simple google apps script router that routes based on `path` url query

Code.gs

const router = Router();
router.Method("GET", "/", function(req, vars) {
  return {"status": "ok"};
});

router.Method("GET", "/?<id>[A-Za-z0-9]+)", function(req, vars) {
  return {"status": "ok", "id": vars.id};
});

router.Method("POST", "/", function(req, vars) {
  return {"status": "ok"};
});



function doGet(req) {
  return router.Serve("GET", req);
}


function doPost(req) {
  return router.Serve("POST", req);
}

Router.gs

function Router() {
  return {
    Routes: [],
    Respond: function(data) {
      return ContentService
            .createTextOutput(JSON.stringify(data))
            .setMimeType(ContentService.MimeType.JSON);
    },
    Method: function(method, path, handler) {
      this.Routes.push({
        Method: method,
        Path: path,
        Regex: new RegExp('^'+path+'$'),
        Handler: handler,
      })
    },
    Serve: function(method, request) {
      for (const route of this.Routes) {
        if (route.Method != method) {
          continue;
        }
        if (request.parameter == undefined || request.parameter.path == undefined) {
          continue;
        }
        const re = new RegExp('^'+route.Path+'$');
        const result = re.exec(request.parameter.path);
        if (result != null) {
          delete request.parameter.path;
          return this.Respond(route.Handler(request, result.groups));
        }
      }
      return this.Respond({
        "status": 404,
      });
    }
  }
}