ScoDoc/app/api/auth.py

# -*- coding: UTF-8 -*
# Authentication code borrowed from Miguel Grinberg's Mega Tutorial
# (see https://github.com/miguelgrinberg/microblog)
# and modified for ScoDoc

# Under The MIT License (MIT)

# Copyright (c) 2017 Miguel Grinberg

# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

from functools import wraps


from flask import abort
from flask import g
from flask_httpauth import HTTPBasicAuth, HTTPTokenAuth

from app import log
from app.auth.models import User
from app.api.errors import error_response

basic_auth = HTTPBasicAuth()
token_auth = HTTPTokenAuth()


@basic_auth.verify_password
def verify_password(username, password):
    "Verify password for this user"
    user = User.query.filter_by(user_name=username).first()
    if user and user.check_password(password):
        g.current_user = user
        # note: est aussi basic_auth.current_user()
        return user


@basic_auth.error_handler
def basic_auth_error(status):
    "error response (401 for invalid auth.)"
    return error_response(status)


@token_auth.verify_token
def verify_token(token) -> User:
    "Retrouve l'utilisateur à partir du jeton"
    user = User.check_token(token) if token else None
    g.current_user = user
    return user


@token_auth.error_handler
def token_auth_error(status):
    "rréponse en cas d'erreur d'auth."
    return error_response(status)


@token_auth.get_user_roles
def get_user_roles(user):
    return user.roles


def token_permission_required(permission):
    "Décorateur pour les fontions de l'API ScoDoc"

    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            # token_auth.login_required()
            current_user = basic_auth.current_user()
            if not current_user or not current_user.has_permission(permission, None):
                if current_user:
                    log(f"API permission denied (user {current_user})")
                else:
                    log("API permission denied (no user supplied)")
                abort(403)
            return f(*args, **kwargs)

        # return decorated_function(token_auth.login_required())
        return decorated_function

    return decorator