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"""Tornado handlers for the notebook."""
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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import datetime
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import json
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import logging
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import os
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import urllib
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from tornado import web
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from tornado import websocket
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#-----------------------------------------------------------------------------
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# Handlers
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#-----------------------------------------------------------------------------
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class MainHandler(web.RequestHandler):
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def get(self):
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self.render('notebook.html')
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class KernelHandler(web.RequestHandler):
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def get(self):
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self.write(json.dumps(self.application.kernel_ids))
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def post(self):
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kernel_id = self.application.start_kernel()
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self.write(json.dumps(kernel_id))
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class KernelActionHandler(web.RequestHandler):
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def post(self, kernel_id, action):
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# TODO: figure out a better way of handling RPC style calls.
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if action == 'interrupt':
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self.application.interrupt_kernel(kernel_id)
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if action == 'restart':
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new_kernel_id = self.application.restart_kernel(kernel_id)
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self.write(json.dumps(new_kernel_id))
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class ZMQStreamHandler(websocket.WebSocketHandler):
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def initialize(self, stream_name):
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self.stream_name = stream_name
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def open(self, kernel_id):
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self.router = self.application.get_router(kernel_id, self.stream_name)
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self.client_id = self.router.register_client(self)
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logging.info("Connection open: %s, %s" % (kernel_id, self.client_id))
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def on_message(self, msg):
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self.router.forward_msg(self.client_id, msg)
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def on_close(self):
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self.router.unregister_client(self.client_id)
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logging.info("Connection closed: %s" % self.client_id)
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class NotebookRootHandler(web.RequestHandler):
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def get(self):
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files = os.listdir(os.getcwd())
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files = [file for file in files if file.endswith(".ipynb")]
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self.write(json.dumps(files))
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class NotebookHandler(web.RequestHandler):
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SUPPORTED_METHODS = ("GET", "DELETE", "PUT")
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def find_path(self, filename):
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filename = urllib.unquote(filename)
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if not filename.endswith('.ipynb'):
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raise web.HTTPError(400)
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path = os.path.join(os.getcwd(), filename)
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return path
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def get(self, filename):
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path = self.find_path(filename)
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if not os.path.isfile(path):
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raise web.HTTPError(404)
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info = os.stat(path)
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self.set_header("Content-Type", "application/unknown")
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self.set_header("Last-Modified", datetime.datetime.utcfromtimestamp(
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info.st_mtime))
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f = open(path, "r")
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try:
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self.finish(f.read())
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finally:
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f.close()
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def put(self, filename):
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path = self.find_path(filename)
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f = open(path, "w")
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f.write(self.request.body)
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f.close()
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self.finish()
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def delete(self, filename):
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path = self.find_path(filename)
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if not os.path.isfile(path):
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raise web.HTTPError(404)
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os.unlink(path)
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self.set_status(204)
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self.finish()
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