How can I create a Flask RESTful API using JWT for authentication?

How can I create a Flask RESTful API using JWT for authentication?

To create a Flask RESTful API using JWT, you'll need to set up Flask, Flask-RESTful, and Flask-JWT-Extended. First, install the necessary packages.

What are the steps to install those packages?

You can install them using pip: pip install Flask Flask-RESTful Flask-JWT-Extended. After that, you can start building your API.

Can you provide a simple code example?

Sure! Here's a basic example:

from flask import Flask, jsonify, request
from flask_restful import Api, Resource
from flask_jwt_extended import JWTManager, create_access_token

app = Flask(__name__)
app.config['JWT_SECRET_KEY'] = 'your_secret_key'
jwt = JWTManager(app)
api = Api(app)

class User(Resource):
    def post(self):
        username = request.json.get('username')
        access_token = create_access_token(identity=username)
        return jsonify(access_token=access_token)

api.add_resource(User, '/login')

if __name__ == '__main__':
    app.run(debug=True)

This code sets up a simple login endpoint.

How do I test this API once it's running?

You can use tools like Postman or curl to send a POST request to the /login endpoint with a JSON body containing the username.