mirror of
https://github.com/morpheus65535/bazarr.git
synced 2024-09-20 07:25:58 +08:00
293 lines
11 KiB
Python
293 lines
11 KiB
Python
import itertools
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import logging
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import signal
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import threading
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from . import base_namespace
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from . import packet
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default_logger = logging.getLogger('socketio.client')
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reconnecting_clients = []
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def signal_handler(sig, frame): # pragma: no cover
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"""SIGINT handler.
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Notify any clients that are in a reconnect loop to abort. Other
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disconnection tasks are handled at the engine.io level.
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"""
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for client in reconnecting_clients[:]:
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client._reconnect_abort.set()
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if callable(original_signal_handler):
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return original_signal_handler(sig, frame)
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else: # pragma: no cover
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# Handle case where no original SIGINT handler was present.
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return signal.default_int_handler(sig, frame)
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original_signal_handler = None
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class BaseClient:
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reserved_events = ['connect', 'connect_error', 'disconnect',
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'__disconnect_final']
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def __init__(self, reconnection=True, reconnection_attempts=0,
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reconnection_delay=1, reconnection_delay_max=5,
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randomization_factor=0.5, logger=False, serializer='default',
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json=None, handle_sigint=True, **kwargs):
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global original_signal_handler
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if handle_sigint and original_signal_handler is None and \
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threading.current_thread() == threading.main_thread():
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original_signal_handler = signal.signal(signal.SIGINT,
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signal_handler)
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self.reconnection = reconnection
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self.reconnection_attempts = reconnection_attempts
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self.reconnection_delay = reconnection_delay
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self.reconnection_delay_max = reconnection_delay_max
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self.randomization_factor = randomization_factor
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self.handle_sigint = handle_sigint
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engineio_options = kwargs
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engineio_options['handle_sigint'] = handle_sigint
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engineio_logger = engineio_options.pop('engineio_logger', None)
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if engineio_logger is not None:
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engineio_options['logger'] = engineio_logger
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if serializer == 'default':
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self.packet_class = packet.Packet
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elif serializer == 'msgpack':
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from . import msgpack_packet
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self.packet_class = msgpack_packet.MsgPackPacket
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else:
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self.packet_class = serializer
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if json is not None:
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self.packet_class.json = json
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engineio_options['json'] = json
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self.eio = self._engineio_client_class()(**engineio_options)
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self.eio.on('connect', self._handle_eio_connect)
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self.eio.on('message', self._handle_eio_message)
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self.eio.on('disconnect', self._handle_eio_disconnect)
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if not isinstance(logger, bool):
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self.logger = logger
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else:
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self.logger = default_logger
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if self.logger.level == logging.NOTSET:
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if logger:
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self.logger.setLevel(logging.INFO)
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else:
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self.logger.setLevel(logging.ERROR)
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self.logger.addHandler(logging.StreamHandler())
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self.connection_url = None
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self.connection_headers = None
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self.connection_auth = None
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self.connection_transports = None
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self.connection_namespaces = []
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self.socketio_path = None
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self.sid = None
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self.connected = False #: Indicates if the client is connected or not.
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self.namespaces = {} #: set of connected namespaces.
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self.handlers = {}
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self.namespace_handlers = {}
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self.callbacks = {}
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self._binary_packet = None
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self._connect_event = None
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self._reconnect_task = None
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self._reconnect_abort = None
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def is_asyncio_based(self):
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return False
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def on(self, event, handler=None, namespace=None):
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"""Register an event handler.
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:param event: The event name. It can be any string. The event names
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``'connect'``, ``'message'`` and ``'disconnect'`` are
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reserved and should not be used. The ``'*'`` event name
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can be used to define a catch-all event handler.
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:param handler: The function that should be invoked to handle the
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event. When this parameter is not given, the method
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acts as a decorator for the handler function.
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:param namespace: The Socket.IO namespace for the event. If this
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argument is omitted the handler is associated with
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the default namespace. A catch-all namespace can be
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defined by passing ``'*'`` as the namespace.
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Example usage::
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# as a decorator:
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@sio.on('connect')
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def connect_handler():
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print('Connected!')
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# as a method:
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def message_handler(msg):
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print('Received message: ', msg)
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sio.send( 'response')
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sio.on('message', message_handler)
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The arguments passed to the handler function depend on the event type:
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- The ``'connect'`` event handler does not take arguments.
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- The ``'disconnect'`` event handler does not take arguments.
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- The ``'message'`` handler and handlers for custom event names receive
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the message payload as only argument. Any values returned from a
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message handler will be passed to the client's acknowledgement
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callback function if it exists.
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- A catch-all event handler receives the event name as first argument,
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followed by any arguments specific to the event.
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- A catch-all namespace event handler receives the namespace as first
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argument, followed by any arguments specific to the event.
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- A combined catch-all namespace and catch-all event handler receives
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the event name as first argument and the namespace as second
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argument, followed by any arguments specific to the event.
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"""
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namespace = namespace or '/'
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def set_handler(handler):
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if namespace not in self.handlers:
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self.handlers[namespace] = {}
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self.handlers[namespace][event] = handler
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return handler
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if handler is None:
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return set_handler
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set_handler(handler)
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def event(self, *args, **kwargs):
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"""Decorator to register an event handler.
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This is a simplified version of the ``on()`` method that takes the
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event name from the decorated function.
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Example usage::
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@sio.event
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def my_event(data):
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print('Received data: ', data)
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The above example is equivalent to::
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@sio.on('my_event')
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def my_event(data):
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print('Received data: ', data)
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A custom namespace can be given as an argument to the decorator::
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@sio.event(namespace='/test')
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def my_event(data):
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print('Received data: ', data)
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"""
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if len(args) == 1 and len(kwargs) == 0 and callable(args[0]):
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# the decorator was invoked without arguments
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# args[0] is the decorated function
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return self.on(args[0].__name__)(args[0])
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else:
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# the decorator was invoked with arguments
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def set_handler(handler):
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return self.on(handler.__name__, *args, **kwargs)(handler)
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return set_handler
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def register_namespace(self, namespace_handler):
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"""Register a namespace handler object.
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:param namespace_handler: An instance of a :class:`Namespace`
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subclass that handles all the event traffic
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for a namespace.
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"""
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if not isinstance(namespace_handler,
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base_namespace.BaseClientNamespace):
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raise ValueError('Not a namespace instance')
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if self.is_asyncio_based() != namespace_handler.is_asyncio_based():
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raise ValueError('Not a valid namespace class for this client')
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namespace_handler._set_client(self)
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self.namespace_handlers[namespace_handler.namespace] = \
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namespace_handler
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def get_sid(self, namespace=None):
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"""Return the ``sid`` associated with a connection.
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:param namespace: The Socket.IO namespace. If this argument is omitted
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the handler is associated with the default
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namespace. Note that unlike previous versions, the
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current version of the Socket.IO protocol uses
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different ``sid`` values per namespace.
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This method returns the ``sid`` for the requested namespace as a
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string.
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"""
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return self.namespaces.get(namespace or '/')
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def transport(self):
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"""Return the name of the transport used by the client.
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The two possible values returned by this function are ``'polling'``
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and ``'websocket'``.
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"""
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return self.eio.transport()
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def _get_event_handler(self, event, namespace, args):
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# return the appropriate application event handler
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#
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# Resolution priority:
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# - self.handlers[namespace][event]
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# - self.handlers[namespace]["*"]
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# - self.handlers["*"][event]
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# - self.handlers["*"]["*"]
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handler = None
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if namespace in self.handlers:
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if event in self.handlers[namespace]:
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handler = self.handlers[namespace][event]
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elif event not in self.reserved_events and \
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'*' in self.handlers[namespace]:
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handler = self.handlers[namespace]['*']
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args = (event, *args)
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elif '*' in self.handlers:
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if event in self.handlers['*']:
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handler = self.handlers['*'][event]
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args = (namespace, *args)
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elif event not in self.reserved_events and \
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'*' in self.handlers['*']:
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handler = self.handlers['*']['*']
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args = (event, namespace, *args)
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return handler, args
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def _get_namespace_handler(self, namespace, args):
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# Return the appropriate application event handler.
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#
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# Resolution priority:
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# - self.namespace_handlers[namespace]
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# - self.namespace_handlers["*"]
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handler = None
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if namespace in self.namespace_handlers:
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handler = self.namespace_handlers[namespace]
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elif '*' in self.namespace_handlers:
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handler = self.namespace_handlers['*']
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args = (namespace, *args)
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return handler, args
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def _generate_ack_id(self, namespace, callback):
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"""Generate a unique identifier for an ACK packet."""
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namespace = namespace or '/'
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if namespace not in self.callbacks:
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self.callbacks[namespace] = {0: itertools.count(1)}
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id = next(self.callbacks[namespace][0])
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self.callbacks[namespace][id] = callback
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return id
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def _handle_eio_connect(self): # pragma: no cover
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raise NotImplementedError()
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def _handle_eio_message(self, data): # pragma: no cover
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raise NotImplementedError()
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def _handle_eio_disconnect(self): # pragma: no cover
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raise NotImplementedError()
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def _engineio_client_class(self): # pragma: no cover
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raise NotImplementedError()
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