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#!/usr/bin/env python
"""Token authentication example
This example demonstrates how to protect Flask endpoints with token
authentication, using JWT tokens. To use this example you need to install the
PyJWT library:
pip install pyjwt
When this application starts, a token is generated for each of the two users.
To gain access, you can use a command line HTTP client such as curl, passing
one of the tokens:
curl -X GET -H "Authorization: Bearer <jws-token>" http://localhost:5000/
The response should include the username, which is obtained from the token. The
tokens have a validity time of one hour, after which they will be rejected.
"""
from time import time
from flask import Flask
from flask_httpauth import HTTPTokenAuth
import jwt
app = Flask(__name__)
app.config['SECRET_KEY'] = 'top secret!'
auth = HTTPTokenAuth('Bearer')
users = ['john', 'susan']
for user in users:
token = jwt.encode({'username': user, 'exp': int(time()) + 3600},
app.config['SECRET_KEY'], algorithm='HS256')
print('*** token for {}: {}\n'.format(user, token))
@auth.verify_token
def verify_token(token):
try:
data = jwt.decode(token, app.config['SECRET_KEY'],
algorithms=['HS256'])
except: # noqa: E722
return False
if 'username' in data:
return data['username']
@app.route('/')
@auth.login_required
def index():
return "Hello, %s!" % auth.current_user()
if __name__ == '__main__':
app.run()
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