README.md

Node.js Helloworld Server

• Served at path /helloworld/node/
• Created by express js

API

HelloWorld

• GET API
• Routed at /helloworld/node/
• Returns a text/plain response containing Hello World!!

Adder

• POST API

• Routed at /helloworld/node/adder

• Request body example:

  POST /helloworld/node/adder application/json
  {
    "a": 523,
    "b": 10
  }

• JSON response body example:

  200 OK application/json
  {
     "sha256": "fb8a0d2da8683cec6cc64542f95ae11e085c72d56c744b2be5be335295976610"
  }

Write

• GET API

• Routed at /helloworld/node/write

• request example:

  GET /helloworld/node/write?line=40

• response example:

  200 OK text/plain
  Line 40 : This is just a sample text

Depoyment

• Systemd service configuration is available at /os/helloworld-node.service

• In the mentioned file, change <path/to/nodejs/main/file> to absolute path of indes.js file

• Save the service file at /lib/systemd/system/helloworld-node.service

• Enable the service:

  > sudo systemctl enable helloworld-node

• start the service:

  > sudo systemctl start helloworld-node

• Now, the server is listening on 0.0.0.0:3000

Use reverse proxy with nginx

• Add proxy config to Nginx server as bellow:

  location /helloworld/node {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_pass http://localhost:3000;
  }

• Restart Nginx service:

> sudo systemctl restart nginx

• Full Nginx config is available at /nginx/nginx-server-config