jupyterlab/packages/extensionmanager-extension/examples/listings/main.py

# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.

import os

HERE = os.path.dirname(__file__)

os.environ['JUPYTERLAB_SETTINGS_DIR'] = str(os.path.join(HERE, 'settings'))

from jupyterlab.labapp import LabApp
from jupyterlab_server import LabServerApp, LabConfig
from notebook.base.handlers import IPythonHandler, FileFindHandler
from notebook.utils import url_path_join as ujoin
import json
from traitlets import Unicode

with open(os.path.join(HERE, 'package.json')) as fid:
    version = json.load(fid)['version']

class ExampleApp(LabApp):
    base_url = '/'
    default_url = Unicode('/lab',
                          help='The default URL to redirect to from `/`')

    def init_webapp(self):
        """initialize tornado webapp and httpserver.
        """
        super().init_webapp()
        default_handlers = [
            (
                ujoin(self.base_url, r"/listings/(.*)"), FileFindHandler,
                 {'path': os.path.join(HERE, 'list')}
            )
        ]
        self.web_app.add_handlers('.*$', default_handlers)

    def start(self):
        settings = self.web_app.settings

        # By default, make terminals available.
        settings.setdefault('terminals_available', True)

        super().start()

if __name__ == '__main__':
    ExampleApp.launch_instance()