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import json
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import logging
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import os
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import uuid
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import zmq
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# Install the pyzmq ioloop. This has to be done before anything else from
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# tornado is imported.
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from zmq.eventloop.zmqstream import ZMQStream
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from zmq.eventloop import ioloop
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import tornado.ioloop
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tornado.ioloop = ioloop
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from tornado import httpserver
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from tornado import options
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from tornado import web
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from tornado import websocket
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from kernelmanager import KernelManager
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options.define("port", default=8888, help="run on the given port", type=int)
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_kernel_id_regex = r"(?P<kernel_id>\w+-\w+-\w+-\w+-\w+)"
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_session_id_regex = r"(?P<session_id>\w+)"
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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_manager.kernel_ids))
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def post(self):
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kid = self.application.kernel_manager.start_kernel()
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logging.info("Starting kernel: %s" % kid)
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self.write(json.dumps(kid))
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class SessionHandler(web.RequestHandler):
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def post(self, *args, **kwargs):
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kernel_id = kwargs['kernel_id']
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session_id = kwargs['session_id']
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logging.info("Starting session: %s, %s" % (kernel_id,session_id))
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km = self.application.kernel_manager
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sm = km.get_session_manager(kernel_id)
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sm.start_session(session_id)
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self.finish()
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class ZMQStreamHandler(websocket.WebSocketHandler):
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stream_name = ''
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def open(self, *args, **kwargs):
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kernel_id = kwargs['kernel_id']
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session_id = kwargs['session_id']
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logging.info("Connection open: %s, %s" % (kernel_id,session_id))
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sm = self.application.kernel_manager.get_session_manager(kernel_id)
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method_name = "get_%s_stream" % self.stream_name
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method = getattr(sm, method_name)
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self.zmq_stream = method(session_id)
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self.zmq_stream.on_recv(self._on_zmq_reply)
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self.session_manager = sm
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self.session_id = session_id
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def on_message(self, msg):
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logging.info("Message received: %r" % msg)
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self.zmq_stream.send(msg)
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def on_close(self):
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logging.info("Connection closed: %s, %s" % (kernel_id,session_id))
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self.zmq_stream.close()
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def _on_zmq_reply(self, msg):
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logging.info("Message reply: %r" % msg)
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self.write_message(msg)
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class IOPubStreamHandler(ZMQStreamHandler):
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stream_name = 'iopub'
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class ShellStreamHandler(ZMQStreamHandler):
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stream_name = 'shell'
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class NotebookApplication(web.Application):
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def __init__(self):
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handlers = [
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(r"/", MainHandler),
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(r"/kernels", KernelHandler),
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(r"/kernels/%s/sessions/%s" % (_kernel_id_regex,_session_id_regex), SessionHandler),
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(r"/kernels/%s/sessions/%s/iopub" % (_kernel_id_regex,_session_id_regex), IOPubStreamHandler),
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(r"/kernels/%s/sessions/%s/shell" % (_kernel_id_regex,_session_id_regex), ShellStreamHandler),
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]
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settings = dict(
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template_path=os.path.join(os.path.dirname(__file__), "templates"),
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static_path=os.path.join(os.path.dirname(__file__), "static"),
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)
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web.Application.__init__(self, handlers, **settings)
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self.context = zmq.Context()
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self.kernel_manager = KernelManager(self.context)
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def main():
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options.parse_command_line()
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application = NotebookApplication()
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http_server = httpserver.HTTPServer(application)
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http_server.listen(options.options.port)
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ioloop.IOLoop.instance().start()
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if __name__ == "__main__":
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main()
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