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83 lines
2.7 KiB
83 lines
2.7 KiB
"""Tornado handlers for dynamic listings loading."""
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# Copyright (c) Jupyter Development Team.
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# Distributed under the terms of the Modified BSD License.
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import os
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import time
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import json
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import re
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import tornado
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from .server import APIHandler
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from traitlets import Instance
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import requests
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LISTINGS_URL_SUFFIX='@jupyterlab/extensionmanager-extension/listings.json'
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def fetch_listings(logger):
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if not logger:
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from traitlets import log
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logger = log.get_logger()
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if len(ListingsHandler.blacklist_uris) > 0:
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blacklist = []
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for blacklist_uri in ListingsHandler.blacklist_uris:
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logger.info('Fetching blacklist from {}'.format(ListingsHandler.blacklist_uris))
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r = requests.request('GET', blacklist_uri, **ListingsHandler.listings_request_opts)
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j = json.loads(r.text)
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for b in j['blacklist']:
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blacklist.append(b)
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ListingsHandler.blacklist = blacklist
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if len(ListingsHandler.whitelist_uris) > 0:
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whitelist = []
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for whitelist_uri in ListingsHandler.whitelist_uris:
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logger.info('Fetching whitelist from {}'.format(ListingsHandler.whitelist_uris))
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r = requests.request('GET', whitelist_uri, **ListingsHandler.listings_request_opts)
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j = json.loads(r.text)
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for w in j['whitelist']:
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whitelist.append(w)
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ListingsHandler.whitelist = whitelist
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ListingsHandler.listings = json.dumps({
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'blacklist_uris': list(ListingsHandler.blacklist_uris),
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'whitelist_uris': list(ListingsHandler.whitelist_uris),
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'blacklist': ListingsHandler.blacklist,
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'whitelist': ListingsHandler.whitelist,
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})
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class ListingsHandler(APIHandler):
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"""An handler that returns the listings specs."""
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"""Below fields are class level fields that are accessed and populated
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by the initialization and the fetch_listings methods.
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Some fields are initialized before the handler creation in the
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handlers.py#add_handlers method.
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Having those fields predefined reduces the guards in the methods using
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them.
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"""
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# The list of blacklist URIS.
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blacklist_uris = set()
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# The list of whitelist URIS.
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whitelist_uris = set()
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# The blacklisted extensions.
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blacklist = []
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# The whitelisted extensions.
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whitelist = []
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# The provider request options to be used for the request library.
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listings_request_opts = {}
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# The PeriodicCallback that schedule the call to fetch_listings method.
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pc = None
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def get(self, path):
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self.set_header('Content-Type', 'application/json')
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if path == LISTINGS_URL_SUFFIX:
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self.write(ListingsHandler.listings)
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else:
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raise tornado.web.HTTPError(400)
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