wip

voila/app.py

@@ -20,6 +20,8 @@
 import threading
 import webbrowser
 
+from .voila_identity_provider import VoilaLoginHandler
+
 try:
     from urllib.parse import urljoin
     from urllib.request import pathname2url
@@ -35,12 +37,29 @@
 from jupyter_core.paths import jupyter_config_path, jupyter_path
 from jupyter_server.base.handlers import FileFindHandler, path_regex
 from jupyter_server.config_manager import recursive_update
-from jupyter_server.services.config import ConfigManager
+from jupyter_server.services.config.manager import ConfigManager
 from jupyter_server.services.contents.largefilemanager import LargeFileManager
-from jupyter_server.services.kernels.handlers import KernelHandler, ZMQChannelsHandler
-from jupyter_server.utils import run_sync, url_path_join
+from jupyter_server.services.kernels.handlers import KernelHandler
+from jupyter_server.services.kernels.websocket import KernelWebsocketHandler
+from jupyter_server.auth.authorizer import AllowAllAuthorizer, Authorizer
+from jupyter_server.auth.identity import PasswordIdentityProvider
+from jupyter_server import DEFAULT_TEMPLATE_PATH_LIST, DEFAULT_STATIC_FILES_PATH
+from jupyter_server.services.kernels.connection.base import (
+    BaseKernelWebsocketConnection,
+)
+from jupyter_server.services.kernels.connection.channels import (
+    ZMQChannelsWebsocketConnection,
+)
+from jupyter_server.auth.identity import (
+    IdentityProvider,
+)
+from jupyter_server.utils import url_path_join
+from jupyter_core.utils import run_sync
+
 from jupyterlab_server.themes_handler import ThemesHandler
-from traitlets import Bool, Callable, Dict, Integer, List, Unicode, default
+
+
+from traitlets import Bool, Callable, Dict, Integer, List, Unicode, default, Type, Bytes
 from traitlets.config.application import Application
 from traitlets.config.loader import Config
 
@@ -272,6 +291,43 @@ def hook(req: tornado.web.RequestHandler,
         ),
     )
 
+    cookie_secret = Bytes(
+        b"",
+        config=True,
+        help="""The random bytes used to secure cookies.
+        By default this is a new random number every time you start the server.
+        Set it to a value in a config file to enable logins to persist across server sessions.
+
+        Note: Cookie secrets should be kept private, do not share config files with
+        cookie_secret stored in plaintext (you can read the value from a file).
+        """,
+    )
+
+    @default("cookie_secret")
+    def _default_cookie_secret(self):
+        return os.urandom(32)
+
+    authorizer_class = Type(
+        default_value=AllowAllAuthorizer,
+        klass=Authorizer,
+        config=True,
+        help=_("The authorizer class to use."),
+    )
+
+    identity_provider_class = Type(
+        default_value=PasswordIdentityProvider,
+        klass=IdentityProvider,
+        config=True,
+        help=_("The identity provider class to use."),
+    )
+
+    kernel_websocket_connection_class = Type(
+        default_value=ZMQChannelsWebsocketConnection,
+        klass=BaseKernelWebsocketConnection,
+        config=True,
+        help=_("The kernel websocket connection class to use."),
+    )
+
     @property
     def display_url(self):
         if self.custom_display_url:
@@ -282,13 +338,17 @@ def display_url(self):
             ip = "%s" % socket.gethostname() if self.ip in ("", "0.0.0.0") else self.ip
             url = self._url(ip)
         # TODO: do we want to have the token?
-        # if self.token:
-        #     # Don't log full token if it came from config
-        #     token = self.token if self._token_generated else '...'
-        #     url = (url_concat(url, {'token': token})
-        #           + '\n or '
-        #           + url_concat(self._url('127.0.0.1'), {'token': token}))
-        return url
+        if self.identity_provider.token:
+            # Don't log full token if it came from config
+            token = (
+                self.identity_provider.token
+                if self.identity_provider.token_generated
+                else "..."
+            )
+            query = f"?token={token}"
+        else:
+            query = ""
+        return f"{url}{query}"
 
     @property
     def connection_url(self):
@@ -405,6 +465,7 @@ def setup_template_dirs(self):
             self.static_paths = collect_static_paths(
                 ["voila", "nbconvert"], template_name
             )
+            self.static_paths.append(DEFAULT_STATIC_FILES_PATH)
             conf_paths = [os.path.join(d, "conf.json") for d in self.template_paths]
             for p in conf_paths:
                 # see if config file exists
@@ -428,17 +489,8 @@ def setup_template_dirs(self):
         if self.notebook_path and not os.path.exists(self.notebook_path):
             raise ValueError("Notebook not found: %s" % self.notebook_path)
 
-    def _handle_signal_stop(self, sig, frame):
-        self.log.info("Handle signal %s." % sig)
-        self.ioloop.add_callback_from_signal(self.ioloop.stop)
-
-    def start(self):
-        self.connection_dir = tempfile.mkdtemp(
-            prefix="voila_", dir=self.connection_dir_root
-        )
-        self.log.info("Storing connection files in %s." % self.connection_dir)
-        self.log.info("Serving static files from %s." % self.static_root)
-
+    def init_settings(self) -> Dict:
+        """Initialize settings for Voila application."""
         # default server_url to base_url
         self.server_url = self.server_url or self.base_url
 
@@ -486,28 +538,55 @@ def start(self):
             extensions=["jinja2.ext.i18n"],
             **jenv_opt,
         )
+        server_env = jinja2.Environment(
+            loader=jinja2.FileSystemLoader(DEFAULT_TEMPLATE_PATH_LIST),
+            extensions=["jinja2.ext.i18n"],
+            **jenv_opt,
+        )
+
         nbui = gettext.translation(
             "nbui", localedir=os.path.join(ROOT, "i18n"), fallback=True
         )
         env.install_gettext_translations(nbui, newstyle=False)
+        server_env.install_gettext_translations(nbui, newstyle=False)
+
+        identity_provider_kwargs = {
+            "parent": self,
+            "log": self.log,
+            "login_handler_class": VoilaLoginHandler,
+        }
+        self.identity_provider = self.identity_provider_class(
+            **identity_provider_kwargs
+        )
 
-        self.app = tornado.web.Application(
+        self.authorizer = self.authorizer_class(
+            parent=self, log=self.log, identity_provider=self.identity_provider
+        )
+
+        settings = dict(
             base_url=self.base_url,
             server_url=self.server_url or self.base_url,
             kernel_manager=self.kernel_manager,
             kernel_spec_manager=self.kernel_spec_manager,
             allow_remote_access=True,
             autoreload=self.autoreload,
             voila_jinja2_env=env,
-            jinja2_env=env,
+            jinja2_env=server_env,
             static_path="/",
             server_root_dir="/",
             contents_manager=self.contents_manager,
             config_manager=self.config_manager,
+            cookie_secret=self.cookie_secret,
+            authorizer=self.authorizer,
+            identity_provider=self.identity_provider,
+            kernel_websocket_connection_class=self.kernel_websocket_connection_class,
+            login_url=url_path_join(self.base_url, "/login"),
         )
 
-        self.app.settings.update(self.tornado_settings)
+        return settings
 
+    def init_handlers(self) -> List:
+        """Initialize handlers for Voila application."""
         handlers = []
 
         handlers.extend(
@@ -522,7 +601,7 @@ def start(self):
                     url_path_join(
                         self.server_url, r"/api/kernels/%s/channels" % _kernel_id_regex
                     ),
-                    ZMQChannelsHandler,
+                    KernelWebsocketHandler,
                 ),
                 (
                     url_path_join(self.server_url, r"/voila/templates/(.*)"),
@@ -549,8 +628,8 @@ def start(self):
                 ),
             ]
         )
-
-        if preheat_kernel:
+        handlers.extend(self.identity_provider.get_handlers())
+        if self.voila_configuration.preheat_kernel:
             handlers.append(
                 (
                     url_path_join(
@@ -621,13 +700,30 @@ def start(self):
                     ),
                 ]
             )
+        return handlers
+
+    def start(self):
+        self.connection_dir = tempfile.mkdtemp(
+            prefix="voila_", dir=self.connection_dir_root
+        )
+        self.log.info("Storing connection files in %s." % self.connection_dir)
+        self.log.info("Serving static files from %s." % self.static_root)
+
+        settings = self.init_settings()
 
+        self.app = tornado.web.Application(**settings)
+        self.app.settings.update(self.tornado_settings)
+        handlers = self.init_handlers()
         self.app.add_handlers(".*$", handlers)
         self.listen()
 
+    def _handle_signal_stop(self, sig, frame):
+        self.log.info("Handle signal %s." % sig)
+        self.ioloop.add_callback_from_signal(self.ioloop.stop)
+
     def stop(self):
         shutil.rmtree(self.connection_dir)
-        run_sync(self.kernel_manager.shutdown_all())
+        run_sync(self.kernel_manager.shutdown_all)()
 
     def random_ports(self, port, n):
         """Generate a list of n random ports near the given port.

voila/voila_identity_provider.py

@@ -0,0 +1,21 @@
+from typing import Any, Optional
+from jupyter_server.auth.identity import IdentityProvider
+from jupyter_server.auth.login import LoginFormHandler
+
+
+class VoilaLoginHandler(LoginFormHandler):
+    def static_url(
+        self, path: str, include_host: Optional[bool] = None, **kwargs: Any
+    ) -> str:
+        settings = {
+            "static_url_prefix": "voila/static/",
+            "static_path": None,
+        }
+        return settings.get("static_url_prefix", "/static/") + path
+
+
+class VoilaIdentityProvider(IdentityProvider):
+    @property
+    def auth_enabled(self) -> bool:
+        """Return whether any auth is enabled"""
+        return bool(self.token)