d20772c680
The method log of Logger has never been documented as being a part of the standard logging module. It was renamed to warning when the module was included in the standard library, but the old name was kept for backward compatibility.
687 lines
23 KiB
Python
687 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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"""
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The MIT License (MIT)
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Copyright (c) 2015-2017 Rapptz
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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"""
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import sys
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import time
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import websockets
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import asyncio
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from . import utils
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from .activity import _ActivityTag
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from .errors import ConnectionClosed, InvalidArgument
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import logging
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import zlib, json
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from collections import namedtuple
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import threading
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import struct
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log = logging.getLogger(__name__)
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__all__ = ['DiscordWebSocket', 'KeepAliveHandler', 'VoiceKeepAliveHandler',
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'DiscordVoiceWebSocket', 'ResumeWebSocket']
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class ResumeWebSocket(Exception):
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"""Signals to initialise via RESUME opcode instead of IDENTIFY."""
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def __init__(self, shard_id):
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self.shard_id = shard_id
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EventListener = namedtuple('EventListener', 'predicate event result future')
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class KeepAliveHandler(threading.Thread):
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def __init__(self, *args, **kwargs):
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ws = kwargs.pop('ws', None)
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interval = kwargs.pop('interval', None)
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shard_id = kwargs.pop('shard_id', None)
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threading.Thread.__init__(self, *args, **kwargs)
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self.ws = ws
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self.interval = interval
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self.daemon = True
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self.shard_id = shard_id
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self.msg = 'Keeping websocket alive with sequence %s.'
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self._stop_ev = threading.Event()
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self._last_ack = time.monotonic()
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self._last_send = time.monotonic()
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self.heartbeat_timeout = ws._max_heartbeat_timeout
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def run(self):
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while not self._stop_ev.wait(self.interval):
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if self._last_ack + self.heartbeat_timeout < time.monotonic():
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log.warning("Shard ID %s has stopped responding to the gateway. Closing and restarting." % self.shard_id)
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coro = self.ws.close(4000)
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f = asyncio.run_coroutine_threadsafe(coro, loop=self.ws.loop)
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try:
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f.result()
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except:
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pass
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finally:
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self.stop()
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return
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data = self.get_payload()
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log.debug(self.msg, data['d'])
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coro = self.ws.send_as_json(data)
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f = asyncio.run_coroutine_threadsafe(coro, loop=self.ws.loop)
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try:
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# block until sending is complete
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f.result()
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except Exception:
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self.stop()
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else:
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self._last_send = time.monotonic()
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def get_payload(self):
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return {
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'op': self.ws.HEARTBEAT,
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'd': self.ws.sequence
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}
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def stop(self):
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self._stop_ev.set()
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def ack(self):
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self._last_ack = time.monotonic()
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class VoiceKeepAliveHandler(KeepAliveHandler):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.msg = 'Keeping voice websocket alive with timestamp %s.'
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def get_payload(self):
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return {
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'op': self.ws.HEARTBEAT,
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'd': int(time.time() * 1000)
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}
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class DiscordWebSocket(websockets.client.WebSocketClientProtocol):
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"""Implements a WebSocket for Discord's gateway v6.
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This is created through :func:`create_main_websocket`. Library
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users should never create this manually.
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Attributes
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-----------
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DISPATCH
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Receive only. Denotes an event to be sent to Discord, such as READY.
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HEARTBEAT
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When received tells Discord to keep the connection alive.
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When sent asks if your connection is currently alive.
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IDENTIFY
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Send only. Starts a new session.
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PRESENCE
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Send only. Updates your presence.
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VOICE_STATE
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Send only. Starts a new connection to a voice guild.
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VOICE_PING
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Send only. Checks ping time to a voice guild, do not use.
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RESUME
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Send only. Resumes an existing connection.
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RECONNECT
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Receive only. Tells the client to reconnect to a new gateway.
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REQUEST_MEMBERS
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Send only. Asks for the full member list of a guild.
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INVALIDATE_SESSION
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Receive only. Tells the client to optionally invalidate the session
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and IDENTIFY again.
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HELLO
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Receive only. Tells the client the heartbeat interval.
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HEARTBEAT_ACK
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Receive only. Confirms receiving of a heartbeat. Not having it implies
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a connection issue.
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GUILD_SYNC
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Send only. Requests a guild sync.
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gateway
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The gateway we are currently connected to.
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token
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The authentication token for discord.
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"""
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DISPATCH = 0
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HEARTBEAT = 1
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IDENTIFY = 2
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PRESENCE = 3
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VOICE_STATE = 4
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VOICE_PING = 5
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RESUME = 6
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RECONNECT = 7
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REQUEST_MEMBERS = 8
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INVALIDATE_SESSION = 9
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HELLO = 10
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HEARTBEAT_ACK = 11
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GUILD_SYNC = 12
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.max_size = None
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# an empty dispatcher to prevent crashes
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self._dispatch = lambda *args: None
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# generic event listeners
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self._dispatch_listeners = []
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# the keep alive
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self._keep_alive = None
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# ws related stuff
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self.session_id = None
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self.sequence = None
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self._zlib = zlib.decompressobj()
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self._buffer = bytearray()
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@classmethod
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async def from_client(cls, client, *, shard_id=None, session=None, sequence=None, resume=False):
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"""Creates a main websocket for Discord from a :class:`Client`.
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This is for internal use only.
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"""
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gateway = await client.http.get_gateway()
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ws = await websockets.connect(gateway, loop=client.loop, klass=cls, compression=None)
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# dynamically add attributes needed
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ws.token = client.http.token
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ws._connection = client._connection
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ws._dispatch = client.dispatch
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ws.gateway = gateway
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ws.shard_id = shard_id
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ws.shard_count = client._connection.shard_count
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ws.session_id = session
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ws.sequence = sequence
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ws._max_heartbeat_timeout = client._connection.heartbeat_timeout
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client._connection._update_references(ws)
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log.info('Created websocket connected to %s', gateway)
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# poll event for OP Hello
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await ws.poll_event()
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if not resume:
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await ws.identify()
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return ws
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await ws.resume()
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try:
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await ws.ensure_open()
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except websockets.exceptions.ConnectionClosed:
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# ws got closed so let's just do a regular IDENTIFY connect.
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log.info('RESUME failed (the websocket decided to close) for Shard ID %s. Retrying.', shard_id)
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return (await cls.from_client(client, shard_id=shard_id))
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else:
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return ws
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def wait_for(self, event, predicate, result=None):
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"""Waits for a DISPATCH'd event that meets the predicate.
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Parameters
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-----------
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event : str
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The event name in all upper case to wait for.
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predicate
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A function that takes a data parameter to check for event
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properties. The data parameter is the 'd' key in the JSON message.
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result
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A function that takes the same data parameter and executes to send
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the result to the future. If None, returns the data.
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Returns
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--------
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asyncio.Future
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A future to wait for.
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"""
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future = self.loop.create_future()
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entry = EventListener(event=event, predicate=predicate, result=result, future=future)
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self._dispatch_listeners.append(entry)
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return future
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async def identify(self):
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"""Sends the IDENTIFY packet."""
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payload = {
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'op': self.IDENTIFY,
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'd': {
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'token': self.token,
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'properties': {
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'$os': sys.platform,
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'$browser': 'discord.py',
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'$device': 'discord.py',
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'$referrer': '',
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'$referring_domain': ''
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},
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'compress': True,
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'large_threshold': 250,
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'v': 3
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}
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}
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if not self._connection.is_bot:
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payload['d']['synced_guilds'] = []
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if self.shard_id is not None and self.shard_count is not None:
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payload['d']['shard'] = [self.shard_id, self.shard_count]
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state = self._connection
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if state._activity is not None or state._status is not None:
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payload['d']['presence'] = {
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'status': state._status,
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'game': state._activity,
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'since': 0,
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'afk': False
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}
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await self.send_as_json(payload)
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log.info('Shard ID %s has sent the IDENTIFY payload.', self.shard_id)
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async def resume(self):
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"""Sends the RESUME packet."""
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payload = {
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'op': self.RESUME,
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'd': {
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'seq': self.sequence,
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'session_id': self.session_id,
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'token': self.token
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}
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}
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await self.send_as_json(payload)
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log.info('Shard ID %s has sent the RESUME payload.', self.shard_id)
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async def received_message(self, msg):
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self._dispatch('socket_raw_receive', msg)
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if isinstance(msg, bytes):
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self._buffer.extend(msg)
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if len(msg) >= 4:
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if msg[-4:] == b'\x00\x00\xff\xff':
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msg = self._zlib.decompress(self._buffer)
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msg = msg.decode('utf-8')
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self._buffer = bytearray()
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else:
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return
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else:
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return
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msg = json.loads(msg)
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log.debug('For Shard ID %s: WebSocket Event: %s', self.shard_id, msg)
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self._dispatch('socket_response', msg)
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op = msg.get('op')
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data = msg.get('d')
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seq = msg.get('s')
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if seq is not None:
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self.sequence = seq
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if op == self.RECONNECT:
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# "reconnect" can only be handled by the Client
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# so we terminate our connection and raise an
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# internal exception signalling to reconnect.
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log.info('Received RECONNECT opcode.')
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await self.close()
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raise ResumeWebSocket(self.shard_id)
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if op == self.HEARTBEAT_ACK:
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self._keep_alive.ack()
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return
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if op == self.HEARTBEAT:
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beat = self._keep_alive.get_payload()
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await self.send_as_json(beat)
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return
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if op == self.HELLO:
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interval = data['heartbeat_interval'] / 1000.0
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self._keep_alive = KeepAliveHandler(ws=self, interval=interval, shard_id=self.shard_id)
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# send a heartbeat immediately
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await self.send_as_json(self._keep_alive.get_payload())
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self._keep_alive.start()
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return
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if op == self.INVALIDATE_SESSION:
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if data == True:
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await asyncio.sleep(5.0, loop=self.loop)
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await self.close()
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raise ResumeWebSocket(self.shard_id)
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self.sequence = None
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self.session_id = None
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log.info('Shard ID %s session has been invalidated.' % self.shard_id)
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await self.identify()
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return
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if op != self.DISPATCH:
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log.warning('Unknown OP code %s.', op)
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return
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event = msg.get('t')
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if event == 'READY':
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self._trace = trace = data.get('_trace', [])
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self.sequence = msg['s']
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self.session_id = data['session_id']
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log.info('Shard ID %s has connected to Gateway: %s (Session ID: %s).',
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self.shard_id, ', '.join(trace), self.session_id)
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if event == 'RESUMED':
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self._trace = trace = data.get('_trace', [])
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log.info('Shard ID %s has successfully RESUMED session %s under trace %s.',
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self.shard_id, self.session_id, ', '.join(trace))
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parser = 'parse_' + event.lower()
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try:
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func = getattr(self._connection, parser)
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except AttributeError:
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log.warning('Unknown event %s.', event)
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else:
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func(data)
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# remove the dispatched listeners
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removed = []
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for index, entry in enumerate(self._dispatch_listeners):
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if entry.event != event:
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continue
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future = entry.future
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if future.cancelled():
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removed.append(index)
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continue
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try:
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valid = entry.predicate(data)
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except Exception as e:
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future.set_exception(e)
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removed.append(index)
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else:
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if valid:
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ret = data if entry.result is None else entry.result(data)
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future.set_result(ret)
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removed.append(index)
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for index in reversed(removed):
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del self._dispatch_listeners[index]
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@property
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def latency(self):
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""":obj:`float`: Measures latency between a HEARTBEAT and a HEARTBEAT_ACK in seconds."""
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heartbeat = self._keep_alive
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return float('inf') if heartbeat is None else heartbeat._last_ack - heartbeat._last_send
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def _can_handle_close(self, code):
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return code not in (1000, 4004, 4010, 4011)
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async def poll_event(self):
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"""Polls for a DISPATCH event and handles the general gateway loop.
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Raises
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------
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ConnectionClosed
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The websocket connection was terminated for unhandled reasons.
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"""
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try:
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msg = await self.recv()
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await self.received_message(msg)
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except websockets.exceptions.ConnectionClosed as e:
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if self._can_handle_close(e.code):
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log.info('Websocket closed with %s (%s), attempting a reconnect.', e.code, e.reason)
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raise ResumeWebSocket(self.shard_id) from e
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else:
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log.info('Websocket closed with %s (%s), cannot reconnect.', e.code, e.reason)
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raise ConnectionClosed(e, shard_id=self.shard_id) from e
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async def send(self, data):
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self._dispatch('socket_raw_send', data)
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await super().send(data)
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async def send_as_json(self, data):
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try:
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await super().send(utils.to_json(data))
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except websockets.exceptions.ConnectionClosed as e:
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if not self._can_handle_close(e.code):
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raise ConnectionClosed(e, shard_id=self.shard_id) from e
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async def change_presence(self, *, activity=None, status=None, afk=False, since=0.0):
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if activity is not None:
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if not isinstance(activity, _ActivityTag):
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raise InvalidArgument('activity must be one of Game, Streaming, or Activity.')
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activity = activity.to_dict()
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if status == 'idle':
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since = int(time.time() * 1000)
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payload = {
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'op': self.PRESENCE,
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'd': {
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'game': activity,
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'afk': afk,
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'since': since,
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'status': status
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}
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}
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sent = utils.to_json(payload)
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log.debug('Sending "%s" to change status', sent)
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await self.send(sent)
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async def request_sync(self, guild_ids):
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payload = {
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'op': self.GUILD_SYNC,
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'd': list(guild_ids)
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}
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await self.send_as_json(payload)
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async def voice_state(self, guild_id, channel_id, self_mute=False, self_deaf=False):
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payload = {
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'op': self.VOICE_STATE,
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'd': {
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'guild_id': guild_id,
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'channel_id': channel_id,
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'self_mute': self_mute,
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'self_deaf': self_deaf
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}
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}
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log.debug('Updating our voice state to %s.', payload)
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await self.send_as_json(payload)
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async def close_connection(self, *args, **kwargs):
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if self._keep_alive:
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self._keep_alive.stop()
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await super().close_connection(*args, **kwargs)
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|
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class DiscordVoiceWebSocket(websockets.client.WebSocketClientProtocol):
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"""Implements the websocket protocol for handling voice connections.
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Attributes
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-----------
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IDENTIFY
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Send only. Starts a new voice session.
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SELECT_PROTOCOL
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Send only. Tells discord what encryption mode and how to connect for voice.
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READY
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Receive only. Tells the websocket that the initial connection has completed.
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HEARTBEAT
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Send only. Keeps your websocket connection alive.
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SESSION_DESCRIPTION
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Receive only. Gives you the secret key required for voice.
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SPEAKING
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Send only. Notifies the client if you are currently speaking.
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HEARTBEAT_ACK
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Receive only. Tells you your heartbeat has been acknowledged.
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RESUME
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Sent only. Tells the client to resume its session.
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HELLO
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Receive only. Tells you that your websocket connection was acknowledged.
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|
INVALIDATE_SESSION
|
|
Sent only. Tells you that your RESUME request has failed and to re-IDENTIFY.
|
|
"""
|
|
|
|
IDENTIFY = 0
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|
SELECT_PROTOCOL = 1
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|
READY = 2
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|
HEARTBEAT = 3
|
|
SESSION_DESCRIPTION = 4
|
|
SPEAKING = 5
|
|
HEARTBEAT_ACK = 6
|
|
RESUME = 7
|
|
HELLO = 8
|
|
INVALIDATE_SESSION = 9
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self.max_size = None
|
|
self._keep_alive = None
|
|
|
|
async def send_as_json(self, data):
|
|
log.debug('Sending voice websocket frame: %s.', data)
|
|
await self.send(utils.to_json(data))
|
|
|
|
async def resume(self):
|
|
state = self._connection
|
|
payload = {
|
|
'op': self.RESUME,
|
|
'd': {
|
|
'token': state.token,
|
|
'server_id': str(state.server_id),
|
|
'session_id': state.session_id
|
|
}
|
|
}
|
|
await self.send_as_json(payload)
|
|
|
|
async def identify(self):
|
|
state = self._connection
|
|
payload = {
|
|
'op': self.IDENTIFY,
|
|
'd': {
|
|
'server_id': str(state.server_id),
|
|
'user_id': str(state.user.id),
|
|
'session_id': state.session_id,
|
|
'token': state.token
|
|
}
|
|
}
|
|
await self.send_as_json(payload)
|
|
|
|
@classmethod
|
|
async def from_client(cls, client, *, resume=False):
|
|
"""Creates a voice websocket for the :class:`VoiceClient`."""
|
|
gateway = 'wss://' + client.endpoint + '/?v=3'
|
|
ws = await websockets.connect(gateway, loop=client.loop, klass=cls, compression=None)
|
|
ws.gateway = gateway
|
|
ws._connection = client
|
|
ws._max_heartbeat_timeout = 60.0
|
|
|
|
if resume:
|
|
await ws.resume()
|
|
else:
|
|
await ws.identify()
|
|
|
|
return ws
|
|
|
|
async def select_protocol(self, ip, port):
|
|
payload = {
|
|
'op': self.SELECT_PROTOCOL,
|
|
'd': {
|
|
'protocol': 'udp',
|
|
'data': {
|
|
'address': ip,
|
|
'port': port,
|
|
'mode': 'xsalsa20_poly1305'
|
|
}
|
|
}
|
|
}
|
|
|
|
await self.send_as_json(payload)
|
|
|
|
async def speak(self, is_speaking=True):
|
|
payload = {
|
|
'op': self.SPEAKING,
|
|
'd': {
|
|
'speaking': is_speaking,
|
|
'delay': 0
|
|
}
|
|
}
|
|
|
|
await self.send_as_json(payload)
|
|
|
|
async def received_message(self, msg):
|
|
log.debug('Voice websocket frame received: %s', msg)
|
|
op = msg['op']
|
|
data = msg.get('d')
|
|
|
|
if op == self.READY:
|
|
interval = data['heartbeat_interval'] / 1000.0
|
|
self._keep_alive = VoiceKeepAliveHandler(ws=self, interval=interval)
|
|
self._keep_alive.start()
|
|
await self.initial_connection(data)
|
|
elif op == self.HEARTBEAT_ACK:
|
|
self._keep_alive.ack()
|
|
elif op == self.INVALIDATE_SESSION:
|
|
log.info('Voice RESUME failed.')
|
|
await self.identify()
|
|
elif op == self.SESSION_DESCRIPTION:
|
|
await self.load_secret_key(data)
|
|
|
|
async def initial_connection(self, data):
|
|
state = self._connection
|
|
state.ssrc = data['ssrc']
|
|
state.voice_port = data['port']
|
|
|
|
packet = bytearray(70)
|
|
struct.pack_into('>I', packet, 0, state.ssrc)
|
|
state.socket.sendto(packet, (state.endpoint_ip, state.voice_port))
|
|
recv = await self.loop.sock_recv(state.socket, 70)
|
|
log.debug('received packet in initial_connection: %s', recv)
|
|
|
|
# the ip is ascii starting at the 4th byte and ending at the first null
|
|
ip_start = 4
|
|
ip_end = recv.index(0, ip_start)
|
|
state.ip = recv[ip_start:ip_end].decode('ascii')
|
|
|
|
# the port is a little endian unsigned short in the last two bytes
|
|
# yes, this is different endianness from everything else
|
|
state.port = struct.unpack_from('<H', recv, len(recv) - 2)[0]
|
|
|
|
log.debug('detected ip: %s port: %s', state.ip, state.port)
|
|
await self.select_protocol(state.ip, state.port)
|
|
log.info('selected the voice protocol for use')
|
|
|
|
async def load_secret_key(self, data):
|
|
log.info('received secret key for voice connection')
|
|
self._connection.secret_key = data.get('secret_key')
|
|
await self.speak()
|
|
|
|
async def poll_event(self):
|
|
try:
|
|
msg = await asyncio.wait_for(self.recv(), timeout=30.0, loop=self.loop)
|
|
await self.received_message(json.loads(msg))
|
|
except websockets.exceptions.ConnectionClosed as e:
|
|
raise ConnectionClosed(e, shard_id=None) from e
|
|
|
|
async def close_connection(self, *args, **kwargs):
|
|
if self._keep_alive:
|
|
self._keep_alive.stop()
|
|
|
|
await super().close_connection(*args, **kwargs)
|