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83 lines
3.1 KiB
Python
83 lines
3.1 KiB
Python
from __future__ import annotations
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from typing import Callable
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from django.conf import settings
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from django.contrib import auth
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from django.contrib.auth.models import User
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from django.core.exceptions import MiddlewareNotUsed
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from django.http import HttpRequest, HttpResponse
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from hc.accounts.models import Profile
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MiddlewareFunc = Callable[[HttpRequest], HttpResponse]
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class TeamAccessMiddleware:
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def __init__(self, get_response: MiddlewareFunc) -> None:
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self.get_response = get_response
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def __call__(self, request: HttpRequest) -> HttpResponse:
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if not request.user.is_authenticated:
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return self.get_response(request)
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setattr(request, "profile", Profile.objects.for_user(request.user))
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return self.get_response(request)
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class CustomHeaderMiddleware:
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"""
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Middleware for utilizing Web-server-provided authentication.
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If request.user is not authenticated, then this middleware:
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- looks for an email address in request.META[settings.REMOTE_USER_HEADER]
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- looks up and automatically logs in the user with a matching email
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"""
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def __init__(self, get_response: MiddlewareFunc) -> None:
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if not settings.REMOTE_USER_HEADER:
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raise MiddlewareNotUsed()
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self.get_response = get_response
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def __call__(self, request: HttpRequest) -> HttpResponse:
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assert settings.REMOTE_USER_HEADER
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# Make sure AuthenticationMiddleware is installed
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assert hasattr(request, "user")
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email = request.META.get(settings.REMOTE_USER_HEADER)
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if not email:
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# If specified header doesn't exist or is empty then log out any
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# authenticated user and return
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if request.user.is_authenticated:
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auth.logout(request)
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return self.get_response(request)
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# The email address from the external authentication system may be in
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# in upper case or mixed case. Convert it to lower case, as we do
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# elsewhere in the system (when registering new users, when inviting users
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# into projects, when changing email address) to avoid naming conflicts.
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email = email.lower()
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# If the user is already authenticated and that user is the user we are
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# getting passed in the headers, then the correct user is already
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# persisted in the session and we don't need to continue.
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if request.user.is_authenticated:
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if request.user.email == email:
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return self.get_response(request)
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else:
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# An authenticated user is associated with the request, but
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# it does not match the authorized user in the header.
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auth.logout(request)
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# We are seeing this user for the first time in this session, attempt
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# to authenticate the user.
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if user := auth.authenticate(request, remote_user_email=email):
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assert isinstance(user, User)
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# User is valid. Set request.user and persist user in the session
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# by logging the user in.
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request.user = user
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auth.login(request, user)
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return self.get_response(request)
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