feat(middleware): add rateLimit feature. (#12)

* feat(middleware): add rateLimit feature.

*     "test": "NODE_ENV='test' TZ='UTC' jest --coverage --runInBand --forceExit",

Author: evenchange4

CHANGELOG.md

@@ -4,6 +4,7 @@
 > Unreleased
 
 * refactor: drop axios & introduce dataloader
+* feat(middleware): add rateLimit feature.
 
 ## [v2.0.1]
 > Aug 18, 2017

README.md

@@ -19,6 +19,7 @@
 
 - Use GraphQL.
 - Dataloader for per-request memory cache.
+- Rate-limiting 1 requests per sec.
 
 ## How To Use
 
@@ -109,6 +110,7 @@ Options:
 
 - [Micro](https://github.com/zeit/micro): Asynchronous HTTP microservices.
 - [Micro-router](https://github.com/pedronauck/micro-router): A tiny and functional router for Zeit's Micro.
+- [Micro-ratelimit](https://github.com/dotcypress/micro-ratelimit): Rate-limiting middleware for micro.
 - [Graphql-tools](https://github.com/apollographql/graphql-tools): 🔧 Build and mock your GraphQL.js schema using the schema language.
 - [Graphql-server-micro](https://github.com/apollographql/apollo-server/tree/master/packages/graphql-server-micro): 🌍 GraphQL server
 - [Dataloader](https://github.com/facebook/dataloader): DataLoader is a generic utility to be used as part of your application's data fetching layer to provide a consistent API over various backends and reduce requests to those backends via batching and caching.

package.json

@@ -25,7 +25,7 @@
     "pkg": "rm -rf pkg && pkg . --out-path pkg",
     "eslint": "eslint ./",
     "format": "prettier --trailing-comma all --single-quote --write '{src,bin}/**/*.js'",
-    "test": "NODE_ENV='test' TZ='UTC' jest --coverage --runInBand",
+    "test": "NODE_ENV='test' TZ='UTC' jest --coverage --runInBand --forceExit",
     "test:watch": "npm run test -- --watch"
   },
   "now": {
@@ -55,6 +55,7 @@
     "micro": "^8.0.2",
     "micro-compress": "^1.0.0",
     "micro-cors": "^0.0.4",
+    "micro-ratelimit": "^0.2.0",
     "microrouter": "^2.2.2",
     "query-string": "^5.0.0",
     "ramda": "^0.24.1",

src/utils/middleware.js

@@ -1,6 +1,7 @@
 const R = require('ramda');
 const compress = require('micro-compress');
 const cors = require('micro-cors');
+const rateLimit = require('micro-ratelimit');
 
 const ORIGIN = process.env.ORIGIN;
 
@@ -11,6 +12,8 @@ const middleware = R.compose(
     origin: ORIGIN || '*',
   }),
   compress,
+  // TODO: jest problem --forceExit
+  R.curry(rateLimit)({ window: 1000, limit: 1 }),
 );
 
 module.exports = middleware;

yarn.lock

@@ -2536,6 +2536,10 @@ micro-dev@^1.2.1:
     pretty-error "2.1.1"
     string-length "2.0.0"
 
+micro-ratelimit@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/micro-ratelimit/-/micro-ratelimit-0.2.0.tgz#68585fa8baed3b7dc696196889a0a7dfa6254bdf"
+
 micro@8.0.2:
   version "8.0.2"
   resolved "https://registry.yarnpkg.com/micro/-/micro-8.0.2.tgz#e49127185c8d1a61146f0555603bef2a7fc47b03"