index.js

// Calling the packages that we need

const express = require("express");
const app = express();
const port = 5000;
const bp = require("body-parser");
const qr = require("qrcode");

// Using the ejs (Embedded JavaScript templates) as our template engine
// and call the body parser  - middleware for parsing bodies from URL
//                           - middleware for parsing json objects

app.set("view engine", "ejs");
app.use(bp.urlencoded({ extended: false }));
app.use(bp.json());

// Simple routing to the index.ejs file
app.get("/", (req, res) => {
    res.render("index");
});

// Blank input
// Incase of blank in the index.ejs file, return error 
// Error  - Empty Data!
app.post("/scan", (req, res) => {
    const url = req.body.url;

    if (url.length === 0) res.send("Empty Data!");
    qr.toDataURL(url, (err, src) => {
        if (err) res.send("Error occured");

        res.render("scan", { src });
    });
});

// Setting up the port for listening requests
app.listen(port, () => console.log("Server at 5000"));
















// Creating the data
let data = {
    name:"Employee Name",
    age:27,
    department:"Police",
    id:"aisuoiqu3234738jdhf100223"
}
 
// Converting the data into String format
let stringdata = JSON.stringify(data)
 
// Print the QR code to terminal
qr.toString(stringdata,{type:'terminal'},
                    function (err, QRcode) {
 
    if(err) return console.log("error occurred")
 
    // Printing the generated code
    //console.log(QRcode)
})
   
// Converting the data into base64
qr.toDataURL(stringdata, function (err, code) {
    if(err) return console.log("error occurred")
 
    // Printing the code
    //console.log(code)
})