Use shared middleware to enforce master key on logs API.

src/Routers/LogsRouter.js

@@ -1,23 +1,11 @@
 import { Parse } from 'parse/node';
 import PromiseRouter from '../PromiseRouter';
-
-// only allow request with master key
-let enforceSecurity = (auth) => {
-  if (!auth || !auth.isMaster) {
-    throw new Parse.Error(
-      Parse.Error.OPERATION_FORBIDDEN,
-      'Clients aren\'t allowed to perform the ' +
-      'get' + ' operation on logs.'
-    );
-  }
-}
+import * as middleware from "../middlewares";
 
 export class LogsRouter extends PromiseRouter {
   
   mountRoutes() {
-    this.route('GET','/logs', (req) => {
-      return this.handleGET(req);
-    });
+    this.route('GET','/logs', middleware.promiseEnforceMasterKeyAccess, req => { return this.handleGET(req); });
   }
 
   // Returns a promise for a {response} object.
@@ -29,31 +17,26 @@ export class LogsRouter extends PromiseRouter {
   // size (optional) Number of rows returned by search. Defaults to 10
   handleGET(req) {
     if (!req.config || !req.config.loggerController) {
-      throw new Parse.Error(Parse.Error.PUSH_MISCONFIGURED,
-        'Logger adapter is not availabe');
+      throw new Parse.Error(Parse.Error.PUSH_MISCONFIGURED, 'Logger adapter is not available.');
     }
 
-    let promise = new Parse.Promise();
     let from = req.query.from;
     let until = req.query.until;
     let size = req.query.size;
     let order = req.query.order
     let level = req.query.level;
-    enforceSecurity(req.auth);
     
     const options = {
       from,
       until,
       size,
       order,
-      level,
-    }
+      level
+    };
     
-    return req.config.loggerController.getLogs(options).then((result) => {
-      return Promise.resolve({
-        response: result
-      });
-    })
+    return req.config.loggerController
+      .getLogs(options)
+      .then(result => ({ response: result }));
   }
 }