How can I implement JWT error logging in Flask?

How can I implement JWT error logging in Flask?

You can use Flask's built-in logging module along with the PyJWT library to log errors related to JWT authentication.

Can you show me a code example for that?

Sure! Here's a simple example:

import logging
from flask import Flask, request, jsonify
import jwt

app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key'

logging.basicConfig(level=logging.ERROR)

@app.route('/protected', methods=['GET'])
def protected():
    token = request.headers.get('Authorization')
    if not token:
        app.logger.error('Token is missing!')
        return jsonify({'message': 'Token is missing!'}), 403
    try:
        jwt.decode(token, app.config['SECRET_KEY'], algorithms=['HS256'])
    except jwt.ExpiredSignatureError:
        app.logger.error('Token has expired!')
        return jsonify({'message': 'Token has expired!'}), 403
    except jwt.InvalidTokenError:
        app.logger.error('Invalid token!')
        return jsonify({'message': 'Invalid token!'}), 403
    return jsonify({'message': 'Access granted!'}), 200

What should I do if I want to log additional information?

You can customize the logging messages by including more context, such as the user's IP address or the endpoint being accessed.