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341 lines (293 loc) · 13.1 KB
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from datetime import datetime
import functools
import os
import socket
import time
from urllib.parse import parse_qs
HOSTNAME = socket.gethostname()
PID = os.getpid()
class EventBuffer:
def __init__(self):
self.buffer = {}
def push(self, type, count=1):
timestamp = int(time.time()) * 1000
key = '{};{}'.format(timestamp, type)
if key not in self.buffer:
self.buffer[key] = {
'timestamp': timestamp,
'type': type,
'count': count,
}
else:
self.buffer[key]['count'] += count
def get_and_clear(self):
buffer = self.buffer
self.buffer = {}
return [value for value in buffer.values()]
class InstrumentedServer:
def __init__(self, sio, auth=None, namespace='/admin', read_only=False,
server_id=None, mode='development'):
"""Instrument the Socket.IO server for monitoring with the `Socket.IO
Admin UI <https://socket.io/docs/v4/admin-ui/>`_.
"""
if auth is None:
raise ValueError('auth must be specified')
self.sio = sio
self.auth = auth
self.admin_namespace = namespace
self.read_only = read_only
self.server_id = server_id or (
self.sio.manager.host_id if hasattr(self.sio.manager, 'host_id')
else HOSTNAME
)
self.mode = mode
self.event_buffer = EventBuffer()
# monkey-patch the server to report metrics to the admin UI
self.instrument()
# start thread that emits "server_stats" every 2 seconds
self.stop_stats_event = sio.eio.create_event()
self.stats_task = None
def instrument(self):
self.sio.on('connect', self.admin_connect,
namespace=self.admin_namespace)
if self.mode == 'development':
if not self.read_only:
self.sio.on('emit', self.admin_emit,
namespace=self.admin_namespace)
self.sio.on('join', self.admin_enter_room,
namespace=self.admin_namespace)
self.sio.on('leave', self.admin_leave_room,
namespace=self.admin_namespace)
self.sio.on('_disconnect', self.admin_disconnect,
namespace=self.admin_namespace)
# track socket connection times
self.sio.manager._timestamps = {}
# report socket.io connections
self.sio.manager.__connect = self.sio.manager.connect
self.sio.manager.connect = self._connect
# report socket.io disconnection
self.sio.manager.__disconnect = self.sio.manager.disconnect
self.sio.manager.disconnect = self._disconnect
# report join rooms
self.sio.manager.__enter_room = self.sio.manager.enter_room
self.sio.manager.enter_room = self._enter_room
# report leave rooms
self.sio.manager.__leave_room = self.sio.manager.leave_room
self.sio.manager.leave_room = self._leave_room
# report emit events
self.sio.__emit_internal = self.sio._emit_internal
self.sio._emit_internal = self._emit_internal
# report receive events
self.sio.__handle_event_internal = self.sio._handle_event_internal
self.sio._handle_event_internal = self._handle_event_internal
# report engine.io connections
self.sio.eio.on('connect', self._handle_eio_connect)
self.sio.eio.on('disconnect', self._handle_eio_disconnect)
# report polling packets
from engineio.socket import Socket
self.sio.eio.__ok = self.sio.eio._ok
self.sio.eio._ok = self._eio_http_response
Socket.__handle_post_request = Socket.handle_post_request
Socket.handle_post_request = functools.partialmethod(
self._eio_handle_post_request)
# report websocket packets
Socket.__websocket_handler = Socket._websocket_handler
Socket._websocket_handler = functools.partialmethod(
self._eio_websocket_handler)
def admin_connect(self, sid, environ, client_auth):
if self.auth:
if not self.auth(client_auth):
raise ConnectionRefusedError('Invalid credentials')
def config(sid):
self.sio.sleep(0.1)
# supported features
features = ['EMIT', 'JOIN', 'LEAVE', 'DISCONNECT', 'MJOIN',
'MLEAVE', 'MDISCONNECT', 'AGGREGATED_EVENTS']
if self.mode == 'development':
features.append('ALL_EVENTS')
self.sio.emit('config', {'supportedFeatures': features},
to=sid, namespace=self.admin_namespace)
# send current sockets
if self.mode == 'development':
all_sockets = []
for nsp in self.sio.manager.get_namespaces():
for sid, eio_sid in self.sio.manager.get_participants(
nsp, None):
all_sockets.append(
self.serialize_socket(sid, nsp, eio_sid))
self.sio.emit('all_sockets', all_sockets, to=sid,
namespace=self.admin_namespace)
self.sio.start_background_task(config, sid)
if self.stats_task is None:
self.stats_task = self.sio.start_background_task(
self._emit_server_stats)
def admin_emit(self, _, namespace, room_filter, event, *data):
self.sio.emit(event, data, to=room_filter, namespace=namespace)
def admin_enter_room(self, _, namespace, room, room_filter=None):
for sid, _ in self.sio.manager.get_participants(
namespace, room_filter):
self.sio.enter_room(sid, room, namespace=namespace)
def admin_leave_room(self, _, namespace, room, room_filter=None):
for sid, _ in self.sio.manager.get_participants(
namespace, room_filter):
self.sio.leave_room(sid, room, namespace=namespace)
def admin_disconnect(self, _, namespace, close, room_filter=None):
for sid, _ in self.sio.manager.get_participants(
namespace, room_filter):
self.sio.disconnect(sid, namespace=namespace)
def shutdown(self):
self.stop_stats_event.set()
self.stats_thread.join()
def _connect(self, eio_sid, namespace):
sid = self.sio.manager.__connect(eio_sid, namespace)
t = time.time()
self.sio.manager._timestamps[sid] = t
serialized_socket = self.serialize_socket(sid, namespace, eio_sid)
self.sio.emit('socket_connected', (
serialized_socket,
datetime.utcfromtimestamp(t).isoformat() + 'Z',
), namespace=self.admin_namespace)
def check_for_upgrade():
for _ in range(5):
self.sio.sleep(5)
if self.sio.eio._get_socket(eio_sid).upgraded:
self.sio.emit('socket_updated', {
'id': sid,
'nsp': namespace,
'transport': 'websocket',
}, namespace=self.admin_namespace)
break
if serialized_socket['transport'] == 'polling':
self.sio.start_background_task(check_for_upgrade)
return sid
def _disconnect(self, sid, namespace, **kwargs):
del self.sio.manager._timestamps[sid]
self.sio.emit('socket_disconnected', (
namespace,
sid,
'N/A',
datetime.utcnow().isoformat() + 'Z',
), namespace=self.admin_namespace)
return self.sio.manager.__disconnect(sid, namespace, **kwargs)
def _enter_room(self, sid, namespace, room, eio_sid=None):
ret = self.sio.manager.__enter_room(sid, namespace, room, eio_sid)
if room:
self.sio.emit('room_joined', (
namespace,
room,
sid,
datetime.utcnow().isoformat() + 'Z',
), namespace=self.admin_namespace)
return ret
def _leave_room(self, sid, namespace, room):
if room:
self.sio.emit('room_left', (
namespace,
room,
sid,
datetime.utcnow().isoformat() + 'Z',
), namespace=self.admin_namespace)
return self.sio.manager.__leave_room(sid, namespace, room)
def _emit_internal(self, eio_sid, event, data, namespace=None, id=None):
ret = self.sio.__emit_internal(eio_sid, event, data,
namespace=namespace, id=id)
if namespace != self.admin_namespace:
sid = self.sio.manager.sid_from_eio_sid(eio_sid, namespace)
self.sio.emit('event_sent', (
namespace,
sid,
[event] + list(data) if isinstance(data, tuple) else [data],
datetime.utcnow().isoformat() + 'Z',
), namespace=self.admin_namespace)
return ret
def _handle_event_internal(self, server, sid, eio_sid, data, namespace,
id):
ret = self.sio.__handle_event_internal(server, sid, eio_sid, data,
namespace, id)
self.sio.emit('event_received', (
namespace,
sid,
data,
datetime.utcnow().isoformat() + 'Z',
), namespace=self.admin_namespace)
return ret
def _handle_eio_connect(self, eio_sid, environ):
self.event_buffer.push('rawConnection')
return self.sio._handle_eio_connect(eio_sid, environ)
def _handle_eio_disconnect(self, eio_sid):
self.event_buffer.push('rawDisconnection')
return self.sio._handle_eio_disconnect(eio_sid)
def _eio_http_response(self, packets=None, headers=None, jsonp_index=None):
ret = self.sio.eio.__ok(packets=packets, headers=headers,
jsonp_index=jsonp_index)
self.event_buffer.push('packetsOut')
self.event_buffer.push('bytesOut', len(ret['response']))
return ret
def _eio_handle_post_request(self, socket, environ):
ret = socket.__handle_post_request(environ)
self.event_buffer.push('packetsIn')
self.event_buffer.push(
'bytesIn', int(environ.get('CONTENT_LENGTH', 0)))
return ret
def _eio_websocket_handler(self, socket, ws):
def _send(ws, data, control_code=None):
self.event_buffer.push('packetsOut')
self.event_buffer.push('bytesOut', len(data))
return ws.__send(data, control_code=control_code)
def _wait(ws):
ret = ws.__wait()
self.event_buffer.push('packetsIn')
self.event_buffer.push('bytesIn', len(ret))
return ret
ws.__send = ws.send
ws.send = functools.partial(_send, ws)
ws.__wait = ws.wait
ws.wait = functools.partial(_wait, ws)
return socket.__websocket_handler(ws)
def _emit_server_stats(self):
start_time = time.time()
namespaces = list(self.sio.handlers.keys())
namespaces.sort()
while not self.stop_stats_event.is_set():
self.sio.sleep(2)
self.sio.emit('server_stats', {
'serverId': self.server_id,
'hostname': HOSTNAME,
'pid': PID,
'uptime': time.time() - start_time,
'clientsCount': len(self.sio.eio.sockets),
'pollingClientsCount': len(
[s for s in self.sio.eio.sockets.values()
if not s.upgraded]),
'aggregatedEvents': self.event_buffer.get_and_clear(),
'namespaces': [{
'name': nsp,
'socketsCount': len(self.sio.manager.rooms.get(
nsp, {None: []})[None])
} for nsp in namespaces],
}, namespace=self.admin_namespace)
def serialize_socket(self, sid, namespace, eio_sid=None):
if eio_sid is None:
eio_sid = self.sio.manager.eio_sid_from_sid(sid)
socket = self.sio.eio._get_socket(eio_sid)
environ = self.sio.environ.get(eio_sid, {})
return {
'id': sid,
'clientId': eio_sid,
'transport': 'websocket' if socket.upgraded else 'polling',
'nsp': namespace,
'data': {},
'handshake': {
'address': environ.get('REMOTE_ADDR', ''),
'headers': {k[5:].lower(): v for k, v in environ.items()
if k.startswith('HTTP_')},
'query': {k: v[0] if len(v) == 1 else v for k, v in parse_qs(
environ.get('QUERY_STRING', '')).items()},
'secure': environ.get('wsgi.url_scheme', '') == 'https',
'url': environ.get('PATH_INFO', ''),
'issued': self.sio.manager._timestamps[sid] * 1000,
'time': datetime.utcfromtimestamp(
self.sio.manager._timestamps[sid]).isoformat() + 'Z',
},
'rooms': self.sio.manager.get_rooms(sid, namespace),
}