Tag archive for: QR code scanner

How to use pycrypto, python-qrcode and Flask-RESTPlus to create QR codes that can send encrypted data to an endpoint

If you want to direct someone to a web page without saying a word, then you can use QR codes to do so.

For example, your QR code reader will direct your phone’s browser to visit our home page when you scan the following QR Code:

Given that, you can use QR codes to send HTTP requests to an endpoint of your HTTP server. In addition, you can embed data that you wish to send to the endpoint in the QR codes.

With this in mind, let’s look at how we can use pycrypto, python-qrcode and Flask-RESTPlus to create QR codes that can send encrypted data to an endpoint.

How to detect keyboard presses made to the browser screen with JavaScript

When you are building a browser-based game, being able to track key presses is helpful.

For this purpose, you can register a JavaScript function that gets called when the browser detects a key is being pressed.

After the browser detects a key press, it will send information about the key to your function.

When your function is able to get the key that is pressed, it can then use this information to update the game state.

In this post, let’s look at how we can detect keyboard presses made to the browser screen with JavaScript.