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"""Various checkers for OAuth2"""
from functools import wraps
from urllib.parse import urljoin
from authlib.integrations.requests_client import OAuth2Session
from flask import (
flash, request, redirect, session as flask_session)
from . import session
from .client import (
authserver_uri, oauth2_clientid, oauth2_clientsecret, oauth2_get)
from .session import clear_session_info
def require_oauth2(func):
"""Decorator for ensuring user is logged in."""
@wraps(func)
def __token_valid__(*args, **kwargs):
"""Check that the user is logged in and their token is valid."""
def __clear_session__(_no_token):
session.clear_session_info()
flask_session.pop("oauth2_token", None)
flask_session.pop("user_details", None)
flash("You need to be logged in.", "alert-warning")
return redirect("/")
def __with_token__(token):
client = OAuth2Session(
oauth2_clientid(), oauth2_clientsecret(), token=token)
resp = client.get(
urljoin(authserver_uri(), "auth/user/"))
user_details = resp.json()
if not user_details.get("error", False):
return func(*args, **kwargs)
return clear_session_info(token)
return session.user_token().either(__clear_session__, __with_token__)
return __token_valid__
def require_oauth2_edit_resource_access(func):
"""Check if a user has edit access for a given resource."""
@wraps(func)
def __check_edit_access__(*args, **kwargs):
# Check edit access, if not return to the same page.
# This is for a GET
resource_name = request.args.get("name", "")
# And for a POST request.
if request.method == "POST":
resource_name = request.form.get("name", "")
result = oauth2_get(
f"auth/resource/authorisation/{resource_name}"
).either(
lambda _: {"roles": []},
lambda val: val
)
if "group:resource:edit-resource" not in result.get("roles", []):
return redirect(f"/datasets/{resource_name}")
return func(*args, **kwargs)
return __check_edit_access__
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