how to start writing API request

In order to request data from API, we need to set up an express to do get request

1. npm install express

2. create file name index.js for my main server foler

3. const express = require('express')
   to call express

4. const db = require('../databasefolder')
   call db folder & file

5. start express by writing
   const app = express();
   const port = 1004;

port can be any 4 digit numbers

1. app.listen(port, () => console.log(Successfully connected to the port ${port}))

2. write your get, put, post requests

ex.

app.get('/products', (req, res) => {
  let { page, count } = req.query;
  if (page === undefined) {
    page = 0;
  };
  if (count === undefined) {
    count = 5;
  };
  db.getProducts(page, count, (err, result) => {
    if (err) {
      res.status(400)
      console.log(err);
    }
    res.status(200)
    res.send(result);
  })
});

app.get('/products/:product_id', (req, res) => {
  const { product_id } = req.params;
  db.getCurrentProduct(product_id, (err, result) => {
    if (err) {
      res.status(400)
      console.log(err);
    }
    res.status(200)
    res.send(result);
  })
});