Quotes from Miguel Grinberg

Blueprints were introduced in Chapter 7 as a way to define routes in the global scope after the creation of the application was moved into a factory function. The routes related to the user authentication system can be added to a auth blueprint. Using different blueprints for different sets of application functionality is a great way to keep the code neatly organized.

Many users do not understand the warning from the browser. For this reason, it is considered good practice for web applications to never leave a POST request as a last request sent by the browser. This practice can be achieved by responding to POST requests with a redirect instead of a normal response.

The safety of user information stored in databases is often overlooked during the design of web applications.