Add idempotency (#6748)

* added idempotency router and middleware

* added idempotency rules for routes classes, functions, jobs, installaions, users

* fixed typo

* ignore requests without header

* removed unused var

* enabled feature only for MongoDB

* changed code comment

* fixed inconsistend storage adapter specification

* Trigger notification

* Travis CI trigger

* Travis CI trigger

* Travis CI trigger

* rebuilt option definitions

* fixed incorrect import path

* added new request ID header to allowed headers

* fixed typescript typos

* add new system class to spec helper

* fixed typescript typos

* re-added postgres conn parameter

* removed postgres conn parameter

* fixed incorrect schema for index creation

* temporarily disabling index creation to fix postgres issue

* temporarily disabling index creation to fix postgres issue

* temporarily disabling index creation to fix postgres issue

* temporarily disabling index creation to fix postgres issue

* temporarily disabling index creation to fix postgres issue

* temporarily disabling index creation to fix postgres issue

* temporarily disabling index creation to fix postgres issue

* trying to fix postgres issue

* fixed incorrect auth when writing to _Idempotency

* trying to fix postgres issue

* Travis CI trigger

* added test cases

* removed number grouping

* fixed test description

* trying to fix postgres issue

* added Github readme docs

* added change log

* refactored tests; fixed some typos

* fixed test case

* fixed default TTL value

* Travis CI Trigger

* Travis CI Trigger

* Travis CI Trigger

* added test case to increase coverage

* Trigger Travis CI

* changed configuration syntax to use regex; added test cases

* removed unused vars

* removed IdempotencyRouter

* Trigger Travis CI

* updated docs

* updated docs

* updated docs

* updated docs

* update docs

* Trigger Travis CI

* fixed coverage

* removed code comments

src/Routers/FunctionsRouter.js

@@ -4,7 +4,7 @@ var Parse = require('parse/node').Parse,
   triggers = require('../triggers');
 
 import PromiseRouter from '../PromiseRouter';
-import { promiseEnforceMasterKeyAccess } from '../middlewares';
+import { promiseEnforceMasterKeyAccess, promiseEnsureIdempotency } from '../middlewares';
 import { jobStatusHandler } from '../StatusHandler';
 import _ from 'lodash';
 import { logger } from '../logger';
@@ -34,11 +34,13 @@ export class FunctionsRouter extends PromiseRouter {
     this.route(
       'POST',
       '/functions/:functionName',
+      promiseEnsureIdempotency,
       FunctionsRouter.handleCloudFunction
     );
     this.route(
       'POST',
       '/jobs/:jobName',
+      promiseEnsureIdempotency,
       promiseEnforceMasterKeyAccess,
       function (req) {
         return FunctionsRouter.handleCloudJob(req);