Chess Image Generator Function

index.js

const functions = require('firebase-functions');
var ChessImageGenerator = require('chess-image-generator');
const express = require('express');
var bodyParser = require('body-parser')
var decode = require('urldecode')

const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
    extended: true
}));

app.get('/*', (request, response) => {

    var imageGenerator = new ChessImageGenerator({
        size: 1024,
        style: 'merida'
    })
    
    imageGenerator.loadFEN(decode(request.url.substring(1)));

    imageGenerator.generateBuffer()
        .then(function (buffer) {
            response.setHeader("Content-Type", "image/png")
            response.status(200).send(buffer)
        }, function (err) {
            response.status(400).send(err)
        });

});

exports.chess = functions.https.onRequest(app);