Introduction to Flask and Version 3.0
Flask is one of the popular and lightweight frameworks for web development in Python, mainly used for creating small applications and also as a RESTful API service. Developers like it due to its simplicity and flexibility, allowing you to focus more on your own code rather than the framework.
Recently, version 3.0 of Flask was released, introducing new features and improvements that empower developers to code more efficiently. In this version, one of the new and interesting features introduced is the Request.scheme functionality.
The Feature Request.scheme in Flask
This feature allows you to easily inspect the protocol used in the user's request. Therefore, if your request is sent via HTTP or HTTPS, you can retrieve this information through Request.scheme. This feature helps you better manage the security of your applications or develop new capabilities based on the type of protocol used.
The Importance of Using Request.scheme
In the world of web development, security is a significant issue. Your applications must always manage sensitive user information securely. One of the first steps to ensure security is to use a secure communication protocol like HTTPS. By using Request.scheme, you can check whether requests were sent securely or not, and if necessary, take the required actions to resolve this.
Example Code Using Request.scheme in Flask
Now that we are familiar with the importance of this feature, let's take a look at how to utilize it in the code.
from flask import Flask, request
app = Flask(__name__)
@app.route('/')
def check_scheme():
scheme = request.scheme
return f'The request scheme is: {scheme}'
if __name__ == '__main__':
app.run(debug=True)Line-by-Line Code Explanation
from flask import Flask, request
This line imports the Flask and request modules for use in the program.
app = Flask(__name__)
This line creates an instance of the Flask class, representing our application.
@app.route('/')
This decorator defines a route in the application that is executed when the user accesses the root URL (/).
def check_scheme():
This function is defined to manage requests to the specified route.
scheme = request.scheme
This extracts the protocol used in the request.
return f'The request scheme is: {scheme}'
This returns the result with the protocol displayed to the user.
if __name__ == '__main__':
This line allows the program to run if it is executed as the main script.
app.run(debug=True)
This runs the Flask application in debug mode on localhost.