Medium - Image Manipulation using NodeJS - Resize endpoint

resize.js

const express = require('express');
const app = express();
const gm = require('gm');
const fs = require('fs');
const port = 1337;

app.get('/ping', (request, response) => {
  response.send('Pong!');
});

app.get('/resize/:width/:height', (request, response) => {

  const  { width, height } = request.params;
  
  // Simple checks to see if the value was passed in the url
  // If it wasn't, the value is changed from undefined to null
  width = width || null;
  height = height || null;
  
  gm('/path/to/image/file')
    .resize(width, height)
    .write('./tmp.png', (err) => {
      if (err) {
        console.log(err); 
      } else {
        response.sendFile('./tmp.png');
      }
    })

   fs.unlinkSync('./tmp.png');
});

app.get('/crop/:width/:height', (request, response) => {
  
  const { width, height } = request.params;
  
  gm('/path/to/image/file')
    .gravity('Center')
    .crop(width, height)
    .write('./tmp.png', (err) => {
      if (err) {
        console.log(err); 
      } else {
        response.sendFile('./tmp.png');
      }
    })

   fs.unlinkSync('./tmp.png');
});

app.listen(port, () => {
  console.log(`Server running on port ${port}`);
});