mirror of
https://github.com/Ultimaker/Cura.git
synced 2025-07-07 23:17:32 -06:00
920d9b9d44
Now it calls checkToken correctly. However now this _parseJWT is not called correctly since there are things calling this one in an attempt to be synchronous again. There is the additional issue that we can't call getAccessTokenUsingRefreshToken synchronously now, because this runs on the main thread and it will then block the main thread until the request is made, which is never because the request is also done on the main thread via Qt's event loop. Contributes to issue CURA-8539.
282 lines
14 KiB
Python
282 lines
14 KiB
Python
# Copyright (c) 2021 Ultimaker B.V.
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# Cura is released under the terms of the LGPLv3 or higher.
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import json
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from datetime import datetime, timedelta
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from typing import Callable, Dict, Optional, TYPE_CHECKING
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from urllib.parse import urlencode, quote_plus
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import requests.exceptions
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from PyQt5.QtCore import QUrl
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from PyQt5.QtGui import QDesktopServices
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from UM.Logger import Logger
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from UM.Message import Message
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from UM.Signal import Signal
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from UM.i18n import i18nCatalog
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from cura.OAuth2.AuthorizationHelpers import AuthorizationHelpers, TOKEN_TIMESTAMP_FORMAT
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from cura.OAuth2.LocalAuthorizationServer import LocalAuthorizationServer
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from cura.OAuth2.Models import AuthenticationResponse
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i18n_catalog = i18nCatalog("cura")
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if TYPE_CHECKING:
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from cura.OAuth2.Models import UserProfile, OAuth2Settings
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from UM.Preferences import Preferences
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MYCLOUD_LOGOFF_URL = "https://account.ultimaker.com/logoff?utm_source=cura&utm_medium=software&utm_campaign=change-account-before-adding-printers"
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class AuthorizationService:
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"""The authorization service is responsible for handling the login flow, storing user credentials and providing
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account information.
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"""
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# Emit signal when authentication is completed.
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onAuthStateChanged = Signal()
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# Emit signal when authentication failed.
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onAuthenticationError = Signal()
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accessTokenChanged = Signal()
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def __init__(self, settings: "OAuth2Settings", preferences: Optional["Preferences"] = None) -> None:
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self._settings = settings
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self._auth_helpers = AuthorizationHelpers(settings)
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self._auth_url = "{}/authorize".format(self._settings.OAUTH_SERVER_URL)
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self._auth_data = None # type: Optional[AuthenticationResponse]
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self._user_profile = None # type: Optional["UserProfile"]
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self._preferences = preferences
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self._server = LocalAuthorizationServer(self._auth_helpers, self._onAuthStateChanged, daemon=True)
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self._unable_to_get_data_message = None # type: Optional[Message]
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self.onAuthStateChanged.connect(self._authChanged)
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def _authChanged(self, logged_in):
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if logged_in and self._unable_to_get_data_message is not None:
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self._unable_to_get_data_message.hide()
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def initialize(self, preferences: Optional["Preferences"] = None) -> None:
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if preferences is not None:
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self._preferences = preferences
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if self._preferences:
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self._preferences.addPreference(self._settings.AUTH_DATA_PREFERENCE_KEY, "{}")
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def getUserProfile(self) -> Optional["UserProfile"]:
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"""Get the user profile as obtained from the JWT (JSON Web Token).
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If the JWT is not yet parsed, calling this will take care of that.
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:return: UserProfile if a user is logged in, None otherwise.
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See also: :py:method:`cura.OAuth2.AuthorizationService.AuthorizationService._parseJWT`
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"""
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if not self._user_profile:
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# If no user profile was stored locally, we try to get it from JWT.
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try:
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self._user_profile = self._parseJWT()
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except requests.exceptions.ConnectionError:
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# Unable to get connection, can't login.
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Logger.logException("w", "Unable to validate user data with the remote server.")
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return None
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if not self._user_profile and self._auth_data:
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# If there is still no user profile from the JWT, we have to log in again.
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Logger.log("w", "The user profile could not be loaded. The user must log in again!")
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self.deleteAuthData()
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return None
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return self._user_profile
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def _parseJWT(self, callback: Callable[[Optional[UserProfile]], None]) -> None:
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"""
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Tries to parse the JWT (JSON Web Token) data, which it does if all the needed data is there.
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:param callback: A function to call asynchronously once the user profile has been obtained. It will be called
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with `None` if it failed to obtain a user profile.
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"""
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if not self._auth_data or self._auth_data.access_token is None:
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# If no auth data exists, we should always log in again.
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Logger.debug("There was no auth data or access token")
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callback(None)
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# When we checked the token we may get a user profile. This callback checks if that is a valid one and tries to refresh the token if it's not.
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def check_user_profile(user_profile):
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if user_profile:
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# If the profile was found, we call it back immediately.
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callback(user_profile)
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return
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# The JWT was expired or invalid and we should request a new one.
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if self._auth_data.refresh_token is None:
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Logger.warning("There was no refresh token in the auth data.")
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callback(None)
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return
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self._auth_data = self._auth_helpers.getAccessTokenUsingRefreshToken(self._auth_data.refresh_token) # TODO: Blocks main thread, preventing HttpRequestManager from functioning?
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if not self._auth_data or self._auth_data.access_token is None:
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Logger.warning("Unable to use the refresh token to get a new access token.")
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callback(None)
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return
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# Ensure it gets stored as otherwise we only have it in memory. The stored refresh token has been deleted
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# from the server already. Do not store the auth_data if we could not get new auth_data (e.g. due to a
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# network error), since this would cause an infinite loop trying to get new auth-data.
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if self._auth_data.success:
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self._storeAuthData(self._auth_data)
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self._auth_helpers.checkToken(self._auth_data.access_token, callback, lambda: callback(None))
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self._auth_helpers.checkToken(self._auth_data.access_token, check_user_profile)
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def getAccessToken(self) -> Optional[str]:
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"""Get the access token as provided by the response data."""
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if self._auth_data is None:
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Logger.log("d", "No auth data to retrieve the access_token from")
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return None
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# Check if the current access token is expired and refresh it if that is the case.
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# We have a fallback on a date far in the past for currently stored auth data in cura.cfg.
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received_at = datetime.strptime(self._auth_data.received_at, TOKEN_TIMESTAMP_FORMAT) \
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if self._auth_data.received_at else datetime(2000, 1, 1)
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expiry_date = received_at + timedelta(seconds = float(self._auth_data.expires_in or 0) - 60)
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if datetime.now() > expiry_date:
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self.refreshAccessToken()
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return self._auth_data.access_token if self._auth_data else None
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def refreshAccessToken(self) -> None:
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"""Try to refresh the access token. This should be used when it has expired."""
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if self._auth_data is None or self._auth_data.refresh_token is None:
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Logger.log("w", "Unable to refresh access token, since there is no refresh token.")
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return
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response = self._auth_helpers.getAccessTokenUsingRefreshToken(self._auth_data.refresh_token)
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if response.success:
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self._storeAuthData(response)
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self.onAuthStateChanged.emit(logged_in = True)
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else:
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Logger.log("w", "Failed to get a new access token from the server.")
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self.onAuthStateChanged.emit(logged_in = False)
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def deleteAuthData(self) -> None:
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"""Delete the authentication data that we have stored locally (eg; logout)"""
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if self._auth_data is not None:
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self._storeAuthData()
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self.onAuthStateChanged.emit(logged_in = False)
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def startAuthorizationFlow(self, force_browser_logout: bool = False) -> None:
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"""Start the flow to become authenticated. This will start a new webbrowser tap, prompting the user to login."""
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Logger.log("d", "Starting new OAuth2 flow...")
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# Create the tokens needed for the code challenge (PKCE) extension for OAuth2.
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# This is needed because the CuraDrivePlugin is a untrusted (open source) client.
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# More details can be found at https://tools.ietf.org/html/rfc7636.
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verification_code = self._auth_helpers.generateVerificationCode()
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challenge_code = self._auth_helpers.generateVerificationCodeChallenge(verification_code)
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state = AuthorizationHelpers.generateVerificationCode()
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# Create the query dict needed for the OAuth2 flow.
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query_parameters_dict = {
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"client_id": self._settings.CLIENT_ID,
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"redirect_uri": self._settings.CALLBACK_URL,
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"scope": self._settings.CLIENT_SCOPES,
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"response_type": "code",
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"state": state, # Forever in our Hearts, RIP "(.Y.)" (2018-2020)
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"code_challenge": challenge_code,
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"code_challenge_method": "S512"
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}
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# Start a local web server to receive the callback URL on.
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try:
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self._server.start(verification_code, state)
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except OSError:
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Logger.logException("w", "Unable to create authorization request server")
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Message(i18n_catalog.i18nc("@info",
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"Unable to start a new sign in process. Check if another sign in attempt is still active."),
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title=i18n_catalog.i18nc("@info:title", "Warning"),
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message_type = Message.MessageType.WARNING).show()
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return
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auth_url = self._generate_auth_url(query_parameters_dict, force_browser_logout)
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# Open the authorization page in a new browser window.
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QDesktopServices.openUrl(QUrl(auth_url))
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def _generate_auth_url(self, query_parameters_dict: Dict[str, Optional[str]], force_browser_logout: bool) -> str:
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"""
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Generates the authentications url based on the original auth_url and the query_parameters_dict to be included.
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If there is a request to force logging out of mycloud in the browser, the link to logoff from mycloud is
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prepended in order to force the browser to logoff from mycloud and then redirect to the authentication url to
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login again. This case is used to sync the accounts between Cura and the browser.
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:param query_parameters_dict: A dictionary with the query parameters to be url encoded and added to the
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authentication link
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:param force_browser_logout: If True, Cura will prepend the MYCLOUD_LOGOFF_URL link before the authentication
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link to force the a browser logout from mycloud.ultimaker.com
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:return: The authentication URL, properly formatted and encoded
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"""
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auth_url = f"{self._auth_url}?{urlencode(query_parameters_dict)}"
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if force_browser_logout:
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connecting_char = "&" if "?" in MYCLOUD_LOGOFF_URL else "?"
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# The url after 'next=' should be urlencoded
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auth_url = f"{MYCLOUD_LOGOFF_URL}{connecting_char}next={quote_plus(auth_url)}"
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return auth_url
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def _onAuthStateChanged(self, auth_response: AuthenticationResponse) -> None:
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"""Callback method for the authentication flow."""
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if auth_response.success:
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Logger.log("d", "Got callback from Authorization state. The user should now be logged in!")
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self._storeAuthData(auth_response)
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self.onAuthStateChanged.emit(logged_in = True)
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else:
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Logger.log("d", "Got callback from Authorization state. Something went wrong: [%s]", auth_response.err_message)
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self.onAuthenticationError.emit(logged_in = False, error_message = auth_response.err_message)
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self._server.stop() # Stop the web server at all times.
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def loadAuthDataFromPreferences(self) -> None:
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"""Load authentication data from preferences."""
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Logger.log("d", "Attempting to load the auth data from preferences.")
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if self._preferences is None:
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Logger.log("e", "Unable to load authentication data, since no preference has been set!")
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return
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try:
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preferences_data = json.loads(self._preferences.getValue(self._settings.AUTH_DATA_PREFERENCE_KEY))
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if preferences_data:
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self._auth_data = AuthenticationResponse(**preferences_data)
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# Also check if we can actually get the user profile information.
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user_profile = self.getUserProfile()
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if user_profile is not None:
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self.onAuthStateChanged.emit(logged_in = True)
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Logger.log("d", "Auth data was successfully loaded")
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else:
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if self._unable_to_get_data_message is not None:
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self._unable_to_get_data_message.hide()
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self._unable_to_get_data_message = Message(i18n_catalog.i18nc("@info",
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"Unable to reach the Ultimaker account server."),
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title = i18n_catalog.i18nc("@info:title", "Warning"),
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message_type = Message.MessageType.ERROR)
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Logger.log("w", "Unable to load auth data from preferences")
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self._unable_to_get_data_message.show()
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except (ValueError, TypeError):
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Logger.logException("w", "Could not load auth data from preferences")
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def _storeAuthData(self, auth_data: Optional[AuthenticationResponse] = None) -> None:
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"""Store authentication data in preferences."""
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Logger.log("d", "Attempting to store the auth data for [%s]", self._settings.OAUTH_SERVER_URL)
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if self._preferences is None:
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Logger.log("e", "Unable to save authentication data, since no preference has been set!")
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return
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self._auth_data = auth_data
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if auth_data:
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self._user_profile = self.getUserProfile()
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self._preferences.setValue(self._settings.AUTH_DATA_PREFERENCE_KEY, json.dumps(auth_data.dump()))
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else:
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Logger.log("d", "Clearing the user profile")
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self._user_profile = None
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self._preferences.resetPreference(self._settings.AUTH_DATA_PREFERENCE_KEY)
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self.accessTokenChanged.emit()
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