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raise no-authorization warning once and allow disabled authorization #738

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Mar 16, 2022
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43 changes: 20 additions & 23 deletions jupyter_server/auth/decorator.py
Original file line number Diff line number Diff line change
Expand Up @@ -14,20 +14,6 @@
from .utils import HTTP_METHOD_TO_AUTH_ACTION


def raise_no_authorizer_warning():
warnings.warn(
"The Tornado web application does not have an 'authorizer' defined "
"in its settings. In future releases of jupyter_server, this will "
"be a required key for all subclasses of `JupyterHandler`. For an "
"example, see the jupyter_server source code for how to "
"add an authorizer to the tornado settings: "
"https://github.com/jupyter-server/jupyter_server/blob/"
"653740cbad7ce0c8a8752ce83e4d3c2c754b13cb/jupyter_server/serverapp.py"
"#L234-L256",
# stacklevel=2
)


def authorized(
action: Optional[Union[str, Callable]] = None,
resource: Optional[str] = None,
Expand Down Expand Up @@ -74,17 +60,28 @@ def inner(self, *args, **kwargs):
if not user:
app_log.warning("Attempting to authorize request without authentication!")
raise HTTPError(status_code=403, log_message=message)
# If the user is allowed to do this action,
# call the method.

# Handle the case where an authorizer wasn't attached to the handler.
if not self.authorizer:
with warnings.catch_warnings():
warnings.simplefilter("once")
raise_no_authorizer_warning()
elif self.authorizer.is_authorized(self, user, action, resource):
warnings.warn(
"The Tornado web application does not have an 'authorizer' defined "
"in its settings. In future releases of jupyter_server, this will "
"be a required key for all subclasses of `JupyterHandler`. For an "
"example, see the jupyter_server source code for how to "
"add an authorizer to the tornado settings: "
"https://github.com/jupyter-server/jupyter_server/blob/"
"653740cbad7ce0c8a8752ce83e4d3c2c754b13cb/jupyter_server/serverapp.py"
"#L234-L256",
FutureWarning,
)
return method(self, *args, **kwargs)
# else raise an exception.
else:
raise HTTPError(status_code=403, log_message=message)

# Only return the method if the action is authorized.
if self.authorizer.is_authorized(self, user, action, resource):
return method(self, *args, **kwargs)

# Raise an exception if the method wasn't returned (i.e. not authorized)
raise HTTPError(status_code=403, log_message=message)

return inner

Expand Down