Exploring Flask Framework Features

This code demonstrates how to use some common features of the Flask framework. This includes retrieving form data from requests, returning JSON responses with jsonify, creating RESTful APIs, storing user data with session, and handling user sessions with Flask-Login.

Technology Stack : This code demonstrates how to use some common features of the Flask framework. This includes retrieving form data from requests, returning JSON responses with jsonify, creating RESTful APIs, storing user data with session, and handling user sessions with Flask-Login.

Code Type : Flask Function

Code Difficulty : Intermediate

                
                    
from flask import Flask, request, jsonify
import random

def random_flask_function():
    # Randomly select a Flask extension or feature to use
    features = {
        '1': ('request', 'Use the request object to access form data or query parameters.'),
        '2': ('jsonify', 'Use jsonify to convert Python dictionaries to JSON responses.'),
        '3': ('Flask-RESTful', 'Use Flask-RESTful to create REST APIs.'),
        '4': ('session', 'Use session to store user-specific data across requests.'),
        '5': ('flask_login', 'Use Flask-Login for handling user sessions.')
    }
    
    # Randomly select a feature
    selected_feature_key = random.choice(list(features.keys()))
    selected_feature, explanation = features[selected_feature_key]
    
    # Generate the function based on the selected feature
    if selected_feature == 'request':
        code = """
def get_form_data():
    name = request.form.get('name')
    email = request.form.get('email')
    return jsonify({'name': name, 'email': email})
"""
    elif selected_feature == 'jsonify':
        code = """
def list_users():
    users = [{'id': 1, 'name': 'Alice'}, {'id': 2, 'name': 'Bob'}]
    return jsonify(users)
"""
    elif selected_feature == 'Flask-RESTful':
        code = """
from flask import Flask, reqparse
from flask_restful import Resource, Api

app = Flask(__name__)
api = Api(app)

class UserList(Resource):
    def get(self):
        users = [{'id': 1, 'name': 'Alice'}, {'id': 2, 'name': 'Bob'}]
        return {'users': users}

api.add_resource(UserList, '/users')

if __name__ == '__main__':
    app.run(debug=True)
"""
    elif selected_feature == 'session':
        code = """
def set_user_session():
    session['user_id'] = 123
    return jsonify({'user_id': session['user_id']})
"""
    elif selected_feature == 'flask_login':
        code = """
from flask import Flask, request, redirect, url_for, flash
from flask_login import LoginManager, UserMixin, login_user, logout_user, login_required

app = Flask(__name__)
app.secret_key = 'supersecretkey'
login_manager = LoginManager()
login_manager.init_app(app)

class User(UserMixin):
    def __init__(self, id):
        self.id = id

@login_manager.user_loader
def load_user(user_id):
    return User(user_id)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        user = User(123)
        login_user(user)
        return redirect(url_for('index'))
    return 'Login Page'

@app.route('/logout')
@login_required
def logout():
    logout_user()
    return 'Logged out'

@app.route('/')
@login_required
def index():
    return 'Welcome to the Home Page!'