79 lines
2.8 KiB
Python
79 lines
2.8 KiB
Python
from authlib.integrations.base_client import OAuthError
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from authlib.integrations.django_client import OAuth
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from authlib.oauth2.rfc6749 import OAuth2Token
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from django.conf import settings
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from django.shortcuts import redirect
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from django.utils.deprecation import MiddlewareMixin
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class OAuthMiddleware(MiddlewareMixin):
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def __init__(self, get_response=None):
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super().__init__(get_response)
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self.oauth = OAuth()
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def process_request(self, request):
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if settings.OAUTH_URL_WHITELISTS is not None:
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for w in settings.OAUTH_URL_WHITELISTS:
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if request.path.startswith(w):
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return self.get_response(request)
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def update_token(token, refresh_token, access_token):
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request.session['token'] = token
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return None
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sso_client = self.oauth.register(
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settings.OAUTH_CLIENT_NAME, overwrite=True, **settings.OAUTH_CLIENT, update_token=update_token
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)
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if request.path.startswith('/oauth/callback'):
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self.clear_session(request)
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request.session['token'] = sso_client.authorize_access_token(request)
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if self.get_current_user(sso_client, request) is not None:
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redirect_uri = request.session.pop('redirect_uri', None)
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if redirect_uri is not None:
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return redirect(redirect_uri)
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return redirect("index")
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if request.session.get('token', None) is not None:
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current_user = self.get_current_user(sso_client, request)
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if current_user is not None:
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return self.get_response(request)
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# remember redirect URI for redirecting to the original URL.
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request.session['redirect_uri'] = request.path
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return sso_client.authorize_redirect(request, settings.OAUTH_CLIENT['redirect_uri'])
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# fetch current login user info
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# 1. check if it's in cache
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# 2. fetch from remote API when it's not in cache
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@staticmethod
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def get_current_user(sso_client, request):
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token = request.session.get('token', None)
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if token is None or 'access_token' not in token:
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return None
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if not OAuth2Token.from_dict(token).is_expired() and 'user' in request.session:
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return request.session['user']
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try:
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res = sso_client.get(settings.OAUTH_CLIENT['userinfo_endpoint'], token=OAuth2Token(token))
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if res.ok:
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request.session['user'] = res.json()
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return res.json()
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raise Exception(res, str(res.__dict__))
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except OAuthError as e:
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print(e)
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return None
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@staticmethod
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def clear_session(request):
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try:
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del request.session['user']
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del request.session['token']
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except KeyError:
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pass
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def __del__(self):
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print('destroyed')
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