How can I implement logging in Flask middleware?

How can I implement logging in Flask middleware?

You can implement logging in Flask middleware by creating a custom middleware class that logs requests and responses.

Can you show me a code example for that?

Sure! Here's a simple example:

from flask import Flask, request
import logging

app = Flask(__name__)

logging.basicConfig(level=logging.INFO)

class LoggingMiddleware:
    def __init__(self, app):
        self.app = app

    def __call__(self, environ, start_response):
        logging.info(f'Request: {environ}')
        return self.app(environ, start_response)

app.wsgi_app = LoggingMiddleware(app.wsgi_app)

@app.route('/')
def hello():
    return 'Hello, World!'

What kind of information should I log?

You should log the request method, URL, headers, and any relevant response data to help with debugging and monitoring.