Approach to create QR Code Generator Service

We will follow some industry standards to organize our code and write the application server. The separation of controller, routes, and services layer helps to make the code more readable, modify friendly and such modules can be easily debugged for server issues.

• app.js: This file will contain our basic server file details and also the express setup. To spin up the server we just use node app.js and you can find the server to be started at the specified port mentioned.
• routes.js: This file contains all our API routes, having a separate routes file is handy when there are large number of api endpoints.
• controller.js: This file contains the first place where our request for generating a QR Code will hit. Generally controller have all the authentications and permissions attached to the endpoints. Any middlewares are tested before entering into the controller functions. This also controls the response type and any validation of needed for the request body.
• service.js: This file will have the business logic/algorithms (the most important part of the application). The logic of qr code generation will be written here. For this we are using a library qrcode, to encode the data that we have received into 2D bar code image.

Nowadays, Quick Response (QR) codes have become an integral tool for transferring information quickly and conveniently. This project aims to develop a QR code generation API service using Node.js and Express.js. In addition, it goes further and extends the former by providing more customization options to follow RESTful API design principles and handle errors.

Output Preview: Let us have a look at how the final output will look like.