|
|
"""Tornado handlers for the notebook."""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
from tornado import web
|
|
|
from tornado import websocket
|
|
|
|
|
|
from zmq.eventloop import ioloop
|
|
|
from zmq.utils import jsonapi
|
|
|
|
|
|
from IPython.zmq.session import Session
|
|
|
|
|
|
try:
|
|
|
from docutils.core import publish_string
|
|
|
except ImportError:
|
|
|
publish_string = None
|
|
|
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Top-level handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class NBBrowserHandler(web.RequestHandler):
|
|
|
def get(self):
|
|
|
nbm = self.application.notebook_manager
|
|
|
project = nbm.notebook_dir
|
|
|
self.render('nbbrowser.html', project=project)
|
|
|
|
|
|
|
|
|
class NewHandler(web.RequestHandler):
|
|
|
def get(self):
|
|
|
notebook_id = self.application.notebook_manager.new_notebook()
|
|
|
self.render('notebook.html', notebook_id=notebook_id)
|
|
|
|
|
|
|
|
|
class NamedNotebookHandler(web.RequestHandler):
|
|
|
def get(self, notebook_id):
|
|
|
nbm = self.application.notebook_manager
|
|
|
if not nbm.notebook_exists(notebook_id):
|
|
|
raise web.HTTPError(404)
|
|
|
self.render('notebook.html', notebook_id=notebook_id)
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Kernel handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class MainKernelHandler(web.RequestHandler):
|
|
|
|
|
|
def get(self):
|
|
|
km = self.application.kernel_manager
|
|
|
self.finish(jsonapi.dumps(km.kernel_ids))
|
|
|
|
|
|
def post(self):
|
|
|
km = self.application.kernel_manager
|
|
|
notebook_id = self.get_argument('notebook', default=None)
|
|
|
kernel_id = km.start_kernel(notebook_id)
|
|
|
self.set_header('Location', '/'+kernel_id)
|
|
|
self.finish(jsonapi.dumps(kernel_id))
|
|
|
|
|
|
|
|
|
class KernelHandler(web.RequestHandler):
|
|
|
|
|
|
SUPPORTED_METHODS = ('DELETE')
|
|
|
|
|
|
def delete(self, kernel_id):
|
|
|
km = self.application.kernel_manager
|
|
|
km.kill_kernel(kernel_id)
|
|
|
self.set_status(204)
|
|
|
self.finish()
|
|
|
|
|
|
|
|
|
class KernelActionHandler(web.RequestHandler):
|
|
|
|
|
|
def post(self, kernel_id, action):
|
|
|
km = self.application.kernel_manager
|
|
|
if action == 'interrupt':
|
|
|
km.interrupt_kernel(kernel_id)
|
|
|
self.set_status(204)
|
|
|
if action == 'restart':
|
|
|
new_kernel_id = km.restart_kernel(kernel_id)
|
|
|
self.write(jsonapi.dumps(new_kernel_id))
|
|
|
self.finish()
|
|
|
|
|
|
|
|
|
class ZMQStreamHandler(websocket.WebSocketHandler):
|
|
|
|
|
|
def _reserialize_reply(self, msg_list):
|
|
|
"""Reserialize a reply message using JSON.
|
|
|
|
|
|
This takes the msg list from the ZMQ socket, unserializes it using
|
|
|
self.session and then serializes the result using JSON. This method
|
|
|
should be used by self._on_zmq_reply to build messages that can
|
|
|
be sent back to the browser.
|
|
|
"""
|
|
|
idents, msg_list = self.session.feed_identities(msg_list)
|
|
|
msg = self.session.unserialize(msg_list)
|
|
|
try:
|
|
|
msg['header'].pop('date')
|
|
|
except KeyError:
|
|
|
pass
|
|
|
try:
|
|
|
msg['parent_header'].pop('date')
|
|
|
except KeyError:
|
|
|
pass
|
|
|
msg.pop('buffers')
|
|
|
return jsonapi.dumps(msg)
|
|
|
|
|
|
def _on_zmq_reply(self, msg_list):
|
|
|
try:
|
|
|
msg = self._reserialize_reply(msg_list)
|
|
|
except:
|
|
|
self.application.kernel_manager.log.critical("Malformed message: %r" % msg_list)
|
|
|
else:
|
|
|
self.write_message(msg)
|
|
|
|
|
|
|
|
|
class IOPubHandler(ZMQStreamHandler):
|
|
|
|
|
|
def initialize(self, *args, **kwargs):
|
|
|
self._kernel_alive = True
|
|
|
self._beating = False
|
|
|
|
|
|
def open(self, kernel_id):
|
|
|
km = self.application.kernel_manager
|
|
|
self.kernel_id = kernel_id
|
|
|
self.session = Session()
|
|
|
self.time_to_dead = km.time_to_dead
|
|
|
self.iopub_stream = km.create_iopub_stream(kernel_id)
|
|
|
self.hb_stream = km.create_hb_stream(kernel_id)
|
|
|
self.iopub_stream.on_recv(self._on_zmq_reply)
|
|
|
self.start_hb(self.kernel_died)
|
|
|
|
|
|
def on_close(self):
|
|
|
self.stop_hb()
|
|
|
self.iopub_stream.close()
|
|
|
self.hb_stream.close()
|
|
|
|
|
|
def start_hb(self, callback):
|
|
|
"""Start the heartbeating and call the callback if the kernel dies."""
|
|
|
if not self._beating:
|
|
|
self._kernel_alive = True
|
|
|
|
|
|
def ping_or_dead():
|
|
|
if self._kernel_alive:
|
|
|
self._kernel_alive = False
|
|
|
self.hb_stream.send(b'ping')
|
|
|
else:
|
|
|
try:
|
|
|
callback()
|
|
|
except:
|
|
|
pass
|
|
|
finally:
|
|
|
self._hb_periodic_callback.stop()
|
|
|
|
|
|
def beat_received(msg):
|
|
|
self._kernel_alive = True
|
|
|
|
|
|
self.hb_stream.on_recv(beat_received)
|
|
|
self._hb_periodic_callback = ioloop.PeriodicCallback(ping_or_dead, self.time_to_dead*1000)
|
|
|
self._hb_periodic_callback.start()
|
|
|
self._beating= True
|
|
|
|
|
|
def stop_hb(self):
|
|
|
"""Stop the heartbeating and cancel all related callbacks."""
|
|
|
if self._beating:
|
|
|
self._hb_periodic_callback.stop()
|
|
|
if not self.hb_stream.closed():
|
|
|
self.hb_stream.on_recv(None)
|
|
|
|
|
|
def kernel_died(self):
|
|
|
self.application.kernel_manager.delete_mapping_for_kernel(self.kernel_id)
|
|
|
self.write_message(
|
|
|
{'header': {'msg_type': 'status'},
|
|
|
'parent_header': {},
|
|
|
'content': {'execution_state':'dead'}
|
|
|
}
|
|
|
)
|
|
|
self.on_close()
|
|
|
|
|
|
|
|
|
class ShellHandler(ZMQStreamHandler):
|
|
|
|
|
|
def initialize(self, *args, **kwargs):
|
|
|
pass
|
|
|
|
|
|
def open(self, kernel_id):
|
|
|
km = self.application.kernel_manager
|
|
|
self.max_msg_size = km.max_msg_size
|
|
|
self.kernel_id = kernel_id
|
|
|
self.session = Session()
|
|
|
self.shell_stream = self.application.kernel_manager.create_shell_stream(kernel_id)
|
|
|
self.shell_stream.on_recv(self._on_zmq_reply)
|
|
|
|
|
|
def on_message(self, msg):
|
|
|
if len(msg) < self.max_msg_size:
|
|
|
msg = jsonapi.loads(msg)
|
|
|
self.session.send(self.shell_stream, msg)
|
|
|
|
|
|
def on_close(self):
|
|
|
self.shell_stream.close()
|
|
|
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Notebook web service handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class NotebookRootHandler(web.RequestHandler):
|
|
|
|
|
|
def get(self):
|
|
|
nbm = self.application.notebook_manager
|
|
|
files = nbm.list_notebooks()
|
|
|
self.finish(jsonapi.dumps(files))
|
|
|
|
|
|
def post(self):
|
|
|
nbm = self.application.notebook_manager
|
|
|
body = self.request.body.strip()
|
|
|
format = self.get_argument('format', default='json')
|
|
|
name = self.get_argument('name', default=None)
|
|
|
if body:
|
|
|
notebook_id = nbm.save_new_notebook(body, name=name, format=format)
|
|
|
else:
|
|
|
notebook_id = nbm.new_notebook()
|
|
|
self.set_header('Location', '/'+notebook_id)
|
|
|
self.finish(jsonapi.dumps(notebook_id))
|
|
|
|
|
|
|
|
|
class NotebookHandler(web.RequestHandler):
|
|
|
|
|
|
SUPPORTED_METHODS = ('GET', 'PUT', 'DELETE')
|
|
|
|
|
|
def get(self, notebook_id):
|
|
|
nbm = self.application.notebook_manager
|
|
|
format = self.get_argument('format', default='json')
|
|
|
last_mod, name, data = nbm.get_notebook(notebook_id, format)
|
|
|
if format == u'json':
|
|
|
self.set_header('Content-Type', 'application/json')
|
|
|
self.set_header('Content-Disposition','attachment; filename="%s.json"' % name)
|
|
|
elif format == u'xml':
|
|
|
self.set_header('Content-Type', 'application/xml')
|
|
|
self.set_header('Content-Disposition','attachment; filename="%s.ipynb"' % name)
|
|
|
elif format == u'py':
|
|
|
self.set_header('Content-Type', 'application/x-python')
|
|
|
self.set_header('Content-Disposition','attachment; filename="%s.py"' % name)
|
|
|
self.set_header('Last-Modified', last_mod)
|
|
|
self.finish(data)
|
|
|
|
|
|
def put(self, notebook_id):
|
|
|
nbm = self.application.notebook_manager
|
|
|
format = self.get_argument('format', default='json')
|
|
|
name = self.get_argument('name', default=None)
|
|
|
nbm.save_notebook(notebook_id, self.request.body, name=name, format=format)
|
|
|
self.set_status(204)
|
|
|
self.finish()
|
|
|
|
|
|
def delete(self, notebook_id):
|
|
|
nbm = self.application.notebook_manager
|
|
|
nbm.delete_notebook(notebook_id)
|
|
|
self.set_status(204)
|
|
|
self.finish()
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# RST web service handlers
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
class RSTHandler(web.RequestHandler):
|
|
|
|
|
|
def post(self):
|
|
|
if publish_string is None:
|
|
|
raise web.HTTPError(503)
|
|
|
body = self.request.body.strip()
|
|
|
source = body
|
|
|
# template_path=os.path.join(os.path.dirname(__file__), u'templates', u'rst_template.html')
|
|
|
defaults = {'file_insertion_enabled': 0,
|
|
|
'raw_enabled': 0,
|
|
|
'_disable_config': 1,
|
|
|
'stylesheet_path': 0
|
|
|
# 'template': template_path
|
|
|
}
|
|
|
try:
|
|
|
html = publish_string(source, writer_name='html',
|
|
|
settings_overrides=defaults
|
|
|
)
|
|
|
except:
|
|
|
raise web.HTTPError(400)
|
|
|
print html
|
|
|
self.set_header('Content-Type', 'text/html')
|
|
|
self.finish(html)
|
|
|
|
|
|
|
|
|
|
