Custom Authenticator to use MediaWiki OAuth with JupyterHub

Requires mwoauth package.

class oauthenticator.mediawiki.MWOAuthenticator(**kwargs: Any)#
admin_users c.MWOAuthenticator.admin_users = Set()#

Set of users that will have admin rights on this JupyterHub.

Note: As of JupyterHub 2.0, full admin rights should not be required, and more precise permissions can be managed via roles.

Admin users have extra privileges:
  • Use the admin panel to see list of users logged in

  • Add / remove users in some authenticators

  • Restart / halt the hub

  • Start / stop users’ single-user servers

  • Can access each individual users’ single-user server (if configured)

Admin access should be treated the same way root access is.

Defaults to an empty set, in which case no user has admin access.

allowed_users c.MWOAuthenticator.allowed_users = Set()#

Set of usernames that are allowed to log in.

Use this with supported authenticators to restrict which users can log in. This is an additional list that further restricts users, beyond whatever restrictions the authenticator has in place. Any user in this list is granted the ‘user’ role on hub startup.

If empty, does not perform any additional restriction.

Changed in version 1.2: Authenticator.whitelist renamed to allowed_users

auth_refresh_age c.MWOAuthenticator.auth_refresh_age = Int(300)#

The max age (in seconds) of authentication info before forcing a refresh of user auth info.

Refreshing auth info allows, e.g. requesting/re-validating auth tokens.

See refresh_user() for what happens when user auth info is refreshed (nothing by default).

authorize_url c.MWOAuthenticator.authorize_url = Unicode('')#

The authenticate url for initiating oauth

auto_login c.MWOAuthenticator.auto_login = Bool(False)#

Automatically begin the login process

rather than starting with a “Login with…” link at /hub/login

To work, .login_url() must give a URL other than the default /hub/login, such as an oauth handler or another automatic login handler, registered with .get_handlers().

New in version 0.8.

auto_login_oauth2_authorize c.MWOAuthenticator.auto_login_oauth2_authorize = Bool(False)#

Automatically begin login process for OAuth2 authorization requests

When another application is using JupyterHub as OAuth2 provider, it sends users to /hub/api/oauth2/authorize. If the user isn’t logged in already, and auto_login is not set, the user will be dumped on the hub’s home page, without any context on what to do next.

Setting this to true will automatically redirect users to login if they aren’t logged in only on the /hub/api/oauth2/authorize endpoint.

New in version 1.5.

basic_auth c.MWOAuthenticator.basic_auth = Bool(False)#

Whether or not to use basic authentication for access token request

blocked_users c.MWOAuthenticator.blocked_users = Set()#

Set of usernames that are not allowed to log in.

Use this with supported authenticators to restrict which users can not log in. This is an additional block list that further restricts users, beyond whatever restrictions the authenticator has in place.

If empty, does not perform any additional restriction.

Changed in version 1.2: Authenticator.blacklist renamed to blocked_users

build_access_tokens_request_params(handler, data=None)#

Builds the parameters that should be passed to the URL request that exchanges the OAuth code for the Access Token. Called by the oauthenticator.OAuthenticator.authenticate().

build_auth_state_dict(token_info, user_info)#

Builds the auth_state dict that will be returned by a succesfull authenticate method call.

  • token_info – the dictionary returned by the token request (exchanging the OAuth code for an Access Token)

  • user_info – the dictionary returned by the userdata request


a dictionary of auth state that should be persisted with the following keys:
  • ”access_token”: the access_token

  • ”refresh_token”: the refresh_token, if available

  • ”id_token”: the id_token, if available

  • ”scope”: the scopes, if available

  • ”token_response”: the full token_info response

  • self.user_auth_state_key: the full user_info response

Return type:


Called by the oauthenticator.OAuthenticator.authenticate()


alias of MWCallbackHandler

client_id c.MWOAuthenticator.client_id = Unicode('')#

No help string is provided.

client_secret c.MWOAuthenticator.client_secret = Unicode('')#

No help string is provided.

custom_403_message c.MWOAuthenticator.custom_403_message = Unicode('Sorry, you are not currently authorized to use this hub. Please contact the hub administrator.')#

The message to be shown when user was not allowed

delete_invalid_users c.MWOAuthenticator.delete_invalid_users = Bool(False)#

Delete any users from the database that do not pass validation

When JupyterHub starts, .add_user will be called on each user in the database to verify that all users are still valid.

If delete_invalid_users is True, any users that do not pass validation will be deleted from the database. Use this if users might be deleted from an external system, such as local user accounts.

If False (default), invalid users remain in the Hub’s database and a warning will be issued. This is the default to avoid data loss due to config changes.

enable_auth_state c.MWOAuthenticator.enable_auth_state = Bool(False)#

Enable persisting auth_state (if available).

auth_state will be encrypted and stored in the Hub’s database. This can include things like authentication tokens, etc. to be passed to Spawners as environment variables.

Encrypting auth_state requires the cryptography package.

Additionally, the JUPYTERHUB_CRYPT_KEY environment variable must contain one (or more, separated by ;) 32B encryption keys. These can be either base64 or hex-encoded.

If encryption is unavailable, auth_state cannot be persisted.

New in JupyterHub 0.8

executor_threads c.MWOAuthenticator.executor_threads = Int(12)#

Number of executor threads.

MediaWiki OAuth requests happen in this thread, so it is mostly waiting for network replies.

extra_authorize_params c.MWOAuthenticator.extra_authorize_params = Dict()#

Extra GET params to send along with the initial OAuth request to the OAuth provider.

async get_token_info(handler, params)#

Makes a “POST” request to self.token_url, with the parameters received as argument.


the JSON response to the token_url the request.

Called by the oauthenticator.OAuthenticator.authenticate()

http_request_kwargs c.MWOAuthenticator.http_request_kwargs = Dict()#

Extra default kwargs passed to all HTTPRequests.

For example, to use a HTTP proxy for all requests:

c.OAuthenticator.http_request_kwargs = {“proxy_host”: “proxy.example.com”, “proxy_port”: 8080}

See the tornado.httpclient.HTTPRequest documentation for all options and limitations: https://www.tornadoweb.org/en/stable/httpclient.html#tornado.httpclient.HTTPRequest

Note that some of these are dependent on the httpclient implementation.


alias of MWLoginHandler

logout_redirect_url c.MWOAuthenticator.logout_redirect_url = Unicode('')#

URL for logging out of Auth0

manage_groups c.MWOAuthenticator.manage_groups = Bool(False)#

Let authenticator manage user groups

If True, Authenticator.authenticate and/or .refresh_user may return a list of group names in the ‘groups’ field, which will be assigned to the user.

All group-assignment APIs are disabled if this is True.

mw_index_url c.MWOAuthenticator.mw_index_url = Unicode('https://meta.wikimedia.org/w/index.php')#

Full path to index.php of the MW instance to use to log in


Override normalize_username to avoid lowercasing usernames

oauth_callback_url c.MWOAuthenticator.oauth_callback_url = Unicode('')#

Callback URL to use. Typically https://{host}/hub/oauth_callback

post_auth_hook c.MWOAuthenticator.post_auth_hook = Any(None)#

An optional hook function that you can implement to do some bootstrapping work during authentication. For example, loading user account details from an external system.

This function is called after the user has passed all authentication checks and is ready to successfully authenticate. This function must return the authentication dict reguardless of changes to it.

This maybe a coroutine.


import os, pwd
def my_hook(authenticator, handler, authentication):
    user_data = pwd.getpwnam(authentication['name'])
    spawn_data = {
        'pw_data': user_data
        'gid_list': os.getgrouplist(authentication['name'], user_data.pw_gid)

    if authentication['auth_state'] is None:
        authentication['auth_state'] = {}
    authentication['auth_state']['spawn_data'] = spawn_data

    return authentication

c.Authenticator.post_auth_hook = my_hook
refresh_pre_spawn c.MWOAuthenticator.refresh_pre_spawn = Bool(False)#

Force refresh of auth prior to spawn.

This forces refresh_user() to be called prior to launching a server, to ensure that auth state is up-to-date.

This can be important when e.g. auth tokens that may have expired are passed to the spawner via environment variables from auth_state.

If refresh_user cannot refresh the user auth data, launch will fail until the user logs in again.

scope c.MWOAuthenticator.scope = List()#

The OAuth scopes to request. See the OAuth documentation of your OAuth provider for options. For GitHub in particular, you can see github_scopes.md in this repo.

token_params c.MWOAuthenticator.token_params = Dict()#

Extra parameters for first POST request exchanging the OAuth code for an Access Token

async token_to_user(token_info)#

Determines who the logged-in user by sending a “GET” request to oauthenticator.OAuthenticator.userdata_url using the access_token.


token_info – the dictionary returned by the token request (exchanging the OAuth code for an Access Token)


the JSON response to the userdata_url request.

Called by the oauthenticator.OAuthenticator.authenticate()

token_url c.MWOAuthenticator.token_url = Unicode('')#

The url retrieving an access token at the completion of oauth

async update_auth_model(auth_model)#

Updates auth_model dict if any fields have changed or additional information is available or returns the unchanged auth_model.

Returns the model unchanged by default.

Should be overridden to take into account changes like group/admin membership.

Args: auth_model - the auth model dictionary dict instead, containing:
  • the name key holding the username

  • the auth_state key, the dictionary of of auth state

    returned by oauthenticator.OAuthenticator.build_auth_state_dict()

Called by the oauthenticator.OAuthenticator.authenticate()

userdata_params c.MWOAuthenticator.userdata_params = Dict()#

Userdata params to get user data login information

userdata_token_method c.MWOAuthenticator.userdata_token_method = Unicode('header')#

Method for sending access token in userdata request. Supported methods: header, url. Default: header

userdata_url c.MWOAuthenticator.userdata_url = Unicode('')#

The url for retrieving user data with a completed access token

username_claim c.MWOAuthenticator.username_claim = Unicode('username')#

Field in userdata reply to use for username The field in the userdata response from which to get the JupyterHub username. Examples include: email, username, nickname

What keys are available will depend on the scopes requested and the authenticator used.

username_map c.MWOAuthenticator.username_map = Dict()#

Dictionary mapping authenticator usernames to JupyterHub users.

Primarily used to normalize OAuth user names to local users.

username_pattern c.MWOAuthenticator.username_pattern = Unicode('')#

Regular expression pattern that all valid usernames must match.

If a username does not match the pattern specified here, authentication will not be attempted.

If not set, allow any username.

validate_server_cert c.MWOAuthenticator.validate_server_cert = Bool(False)#

No help string is provided.

whitelist c.MWOAuthenticator.whitelist = Set()#

Deprecated, use Authenticator.allowed_users