You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
193 lines
6.7 KiB
193 lines
6.7 KiB
import itertools
|
|
import logging
|
|
|
|
from bidict import bidict
|
|
|
|
default_logger = logging.getLogger('socketio')
|
|
|
|
|
|
class BaseManager(object):
|
|
"""Manage client connections.
|
|
|
|
This class keeps track of all the clients and the rooms they are in, to
|
|
support the broadcasting of messages. The data used by this class is
|
|
stored in a memory structure, making it appropriate only for single process
|
|
services. More sophisticated storage backends can be implemented by
|
|
subclasses.
|
|
"""
|
|
def __init__(self):
|
|
self.logger = None
|
|
self.server = None
|
|
self.rooms = {} # self.rooms[namespace][room][sio_sid] = eio_sid
|
|
self.eio_to_sid = {}
|
|
self.callbacks = {}
|
|
self.pending_disconnect = {}
|
|
|
|
def set_server(self, server):
|
|
self.server = server
|
|
|
|
def initialize(self):
|
|
"""Invoked before the first request is received. Subclasses can add
|
|
their initialization code here.
|
|
"""
|
|
pass
|
|
|
|
def get_namespaces(self):
|
|
"""Return an iterable with the active namespace names."""
|
|
return self.rooms.keys()
|
|
|
|
def get_participants(self, namespace, room):
|
|
"""Return an iterable with the active participants in a room."""
|
|
for sid, eio_sid in self.rooms[namespace][room]._fwdm.copy().items():
|
|
yield sid, eio_sid
|
|
|
|
def connect(self, eio_sid, namespace):
|
|
"""Register a client connection to a namespace."""
|
|
sid = self.server.eio.generate_id()
|
|
self.enter_room(sid, namespace, None, eio_sid=eio_sid)
|
|
self.enter_room(sid, namespace, sid, eio_sid=eio_sid)
|
|
return sid
|
|
|
|
def is_connected(self, sid, namespace):
|
|
if namespace in self.pending_disconnect and \
|
|
sid in self.pending_disconnect[namespace]:
|
|
# the client is in the process of being disconnected
|
|
return False
|
|
try:
|
|
return self.rooms[namespace][None][sid] is not None
|
|
except KeyError:
|
|
pass
|
|
|
|
def sid_from_eio_sid(self, eio_sid, namespace):
|
|
try:
|
|
return self.rooms[namespace][None]._invm[eio_sid]
|
|
except KeyError:
|
|
pass
|
|
|
|
def eio_sid_from_sid(self, sid, namespace):
|
|
if namespace in self.rooms:
|
|
return self.rooms[namespace][None].get(sid)
|
|
|
|
def can_disconnect(self, sid, namespace):
|
|
return self.is_connected(sid, namespace)
|
|
|
|
def pre_disconnect(self, sid, namespace):
|
|
"""Put the client in the to-be-disconnected list.
|
|
|
|
This allows the client data structures to be present while the
|
|
disconnect handler is invoked, but still recognize the fact that the
|
|
client is soon going away.
|
|
"""
|
|
if namespace not in self.pending_disconnect:
|
|
self.pending_disconnect[namespace] = []
|
|
self.pending_disconnect[namespace].append(sid)
|
|
return self.rooms[namespace][None].get(sid)
|
|
|
|
def disconnect(self, sid, namespace):
|
|
"""Register a client disconnect from a namespace."""
|
|
if namespace not in self.rooms:
|
|
return
|
|
rooms = []
|
|
for room_name, room in self.rooms[namespace].copy().items():
|
|
if sid in room:
|
|
rooms.append(room_name)
|
|
for room in rooms:
|
|
self.leave_room(sid, namespace, room)
|
|
if sid in self.callbacks:
|
|
del self.callbacks[sid]
|
|
if namespace in self.pending_disconnect and \
|
|
sid in self.pending_disconnect[namespace]:
|
|
self.pending_disconnect[namespace].remove(sid)
|
|
if len(self.pending_disconnect[namespace]) == 0:
|
|
del self.pending_disconnect[namespace]
|
|
|
|
def enter_room(self, sid, namespace, room, eio_sid=None):
|
|
"""Add a client to a room."""
|
|
if namespace not in self.rooms:
|
|
self.rooms[namespace] = {}
|
|
if room not in self.rooms[namespace]:
|
|
self.rooms[namespace][room] = bidict()
|
|
if eio_sid is None:
|
|
eio_sid = self.rooms[namespace][None][sid]
|
|
self.rooms[namespace][room][sid] = eio_sid
|
|
|
|
def leave_room(self, sid, namespace, room):
|
|
"""Remove a client from a room."""
|
|
try:
|
|
del self.rooms[namespace][room][sid]
|
|
if len(self.rooms[namespace][room]) == 0:
|
|
del self.rooms[namespace][room]
|
|
if len(self.rooms[namespace]) == 0:
|
|
del self.rooms[namespace]
|
|
except KeyError:
|
|
pass
|
|
|
|
def close_room(self, room, namespace):
|
|
"""Remove all participants from a room."""
|
|
try:
|
|
for sid, _ in self.get_participants(namespace, room):
|
|
self.leave_room(sid, namespace, room)
|
|
except KeyError:
|
|
pass
|
|
|
|
def get_rooms(self, sid, namespace):
|
|
"""Return the rooms a client is in."""
|
|
r = []
|
|
try:
|
|
for room_name, room in self.rooms[namespace].items():
|
|
if room_name is not None and sid in room:
|
|
r.append(room_name)
|
|
except KeyError:
|
|
pass
|
|
return r
|
|
|
|
def emit(self, event, data, namespace, room=None, skip_sid=None,
|
|
callback=None, **kwargs):
|
|
"""Emit a message to a single client, a room, or all the clients
|
|
connected to the namespace."""
|
|
if namespace not in self.rooms or room not in self.rooms[namespace]:
|
|
return
|
|
if not isinstance(skip_sid, list):
|
|
skip_sid = [skip_sid]
|
|
for sid, eio_sid in self.get_participants(namespace, room):
|
|
if sid not in skip_sid:
|
|
if callback is not None:
|
|
id = self._generate_ack_id(sid, callback)
|
|
else:
|
|
id = None
|
|
self.server._emit_internal(eio_sid, event, data, namespace, id)
|
|
|
|
def trigger_callback(self, sid, id, data):
|
|
"""Invoke an application callback."""
|
|
callback = None
|
|
try:
|
|
callback = self.callbacks[sid][id]
|
|
except KeyError:
|
|
# if we get an unknown callback we just ignore it
|
|
self._get_logger().warning('Unknown callback received, ignoring.')
|
|
else:
|
|
del self.callbacks[sid][id]
|
|
if callback is not None:
|
|
callback(*data)
|
|
|
|
def _generate_ack_id(self, sid, callback):
|
|
"""Generate a unique identifier for an ACK packet."""
|
|
if sid not in self.callbacks:
|
|
self.callbacks[sid] = {0: itertools.count(1)}
|
|
id = next(self.callbacks[sid][0])
|
|
self.callbacks[sid][id] = callback
|
|
return id
|
|
|
|
def _get_logger(self):
|
|
"""Get the appropriate logger
|
|
|
|
Prevents uninitialized servers in write-only mode from failing.
|
|
"""
|
|
|
|
if self.logger:
|
|
return self.logger
|
|
elif self.server:
|
|
return self.server.logger
|
|
else:
|
|
return default_logger
|