REST = Representational State Transfer. Transfer data instead fo user interfaces.
-
Uniform interface
- Clearly defined API endpoints with clearly defined request + response data structure
-
Stateless interactions
- Server and client don't store any connection history, every request is handled separately.
-
PUT
- Put a resource onto the Server (i.e. create or overwrite a Resouce)
-
PATCH
- Update parts of an existing resource on the server.
-
200- Success
-
201- Successful to create a resource
CORS is Cross-Origin Resource Sharing. When client and server runs on different domains, it has CORS error. But we want to share data between client and server.
Typically, CORS error is solved in server side, not in client side.
const express = require("express");
const app = express();
app.use((req, res, next) => {
res.setHeader("Access-Control-Allow-Origin", "*");
res.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE");
res.setHeader("Access-Control-Allow-Headers", "Content-Type, Authorization");
next();
});
- Postman
- Node.js
- Express.js
npm init
npm install
--save express
--save mongoose
dotenv
--save-dev nodemon
(--save body-parser)
package.json, "scripts": {"start": "nodemon app.js"}.
Deployment
- Creat Docker image of Node.js/Express API
- Create Kubernetes Deployment of the Docker image and deploy to Kubernetes
- Set small
limitsandrequestsinresources
- Set small
- Create Kubernetes Service for the deployment and deploy to Kubernetes
- Create Kubernetes Ingress, define path for the API, and deploy to Kubernetes
- Set up HTTPS between client and load balancer.
- Details: https://github.com/yukikitayama/kubernetes/tree/main