express-gateway

Example uses express-gateway for microservice

Install and run app

Setup env nodejs

Step 1: clone project with command [email protected]:linhbkhn95/express-gateway-example.git

Step 2: install dependencies with yarn command

Step 3: start project

• Start gateway service

  • Ensure port 80 is free, if run stop process use port 80
  • Run service with command node server

• Start backend services

  • Move into backend folder with cd /serives
  • Run backend services with node backend

Test

With current config in this project we will have

• http://localhost/users for service user
• http://localhost/shops fro service shop

Authentication

• For user service, we already set config about auth.

- jwt:
    action:
      secretOrPublicKey: 'the-secret-key'
      checkCredentialExistence: false
- log:
    action:
      message: '${req.method} ${req.originalUrl}'
- request-transformer:
    action:
      headers:
        add:
          requestID: 'requestID'

So, to can test, we can use example:

curl --location 'http://localhost/users/linhtd' \
--header 'Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.e30.79crTy8WpF6gVaCj3G7TsdU7JQzAMZCOuEf5Y8wmC4U'

Rate limit

• For shop api. We already had config for rate limit

shop:
  apiEndpoints:
    - shop
  policies:
    - rate-limit:
      -
        action:
          max: 10
          windowMs: 120000
          rateLimitBy: "${req.hostname}"

So, all of shop's API wil be rate limit that we allow maximum 10 req/2min per client.

(*): Error when reached up rate limit

Too many requests, please try again later.