Open a notebook via the command line (#98)

* Open a notebook via the command line

* Assign default_url to self.serverapp

* Update to latest jupyter server to open via the cli

* Add redirect handler to open non notebook files

jupyterlab_classic/app.py

@@ -6,7 +6,7 @@
     ExtensionHandlerMixin,
     ExtensionHandlerJinjaMixin,
 )
-from jupyter_server.utils import url_path_join as ujoin, url_escape
+from jupyter_server.utils import url_path_join as ujoin
 from jupyterlab.commands import get_app_dir, get_user_settings_dir, get_workspaces_dir
 from jupyterlab_server import LabServerApp
 from jupyterlab_server.config import get_page_config, recursive_update, LabConfig
@@ -105,17 +105,26 @@ class ClassicApp(NBClassicConfigShimMixin, LabServerApp):
     app_name = "JupyterLab Classic"
     description = "JupyterLab Classic - A JupyterLab Distribution with the Classic Notebook look and feel"
     app_version = version
-    extension_url = "/classic/tree"
+    extension_url = "/classic"
     default_url = "/classic/tree"
+    file_url_prefix = "/classic/notebooks"
     load_other_extensions = True
     app_dir = app_dir
     app_settings_dir = pjoin(app_dir, "settings")
     schemas_dir = pjoin(app_dir, "schemas")
     themes_dir = pjoin(app_dir, "themes")
     user_settings_dir = get_user_settings_dir()
     workspaces_dir = get_workspaces_dir()
+    subcommands = {}
 
     def initialize_handlers(self):
+        self.handlers.append(
+            (
+                rf"/{self.file_url_prefix}/((?!.*\.ipynb($|\?)).*)",
+                web.RedirectHandler,
+                {"url": "/classic/edit/{0}"}
+            )
+        )
         self.handlers.append(("/classic/tree(.*)", ClassicTreeHandler))
         self.handlers.append(("/classic/notebooks(.*)", ClassicNotebookHandler))
         self.handlers.append(("/classic/edit(.*)", ClassicFileHandler))
@@ -129,6 +138,13 @@ def initialize_templates(self):
         self.static_paths = [self.static_dir]
         self.template_paths = [self.templates_dir]
 
+    def initialize_settings(self):
+        super().initialize_settings()
+
+    def initialize(self, argv=None):
+        """Subclass because the ExtensionApp.initialize() method does not take arguments"""
+        super().initialize()
+
 
 main = launch_new_instance = ClassicApp.launch_instance
 

setup.py

@@ -84,7 +84,11 @@
     cmdclass=cmdclass,
     packages=setuptools.find_packages(),
     install_requires=[
-        "jupyterlab~=3.0",
+        "jupyterlab>=3.0.9,<4",
+        "jupyterlab_server~=2.3",
+        "jupyter_server~=1.4",
+        "nbclassic~=0.2",
+        "tornado>=6.1.0",
     ],
     zip_safe=False,
     include_package_data=True,