mirror of
https://github.com/Rapptz/discord.py.git
synced 2025-05-07 06:19:56 +00:00
3802780f77
Some of the logs were only useful for debug scenarios, so they have been downgraded to DEBUG. Others were in INFO but supposed to be in WARNING so those were upgraded.
688 lines
24 KiB
Python
688 lines
24 KiB
Python
"""
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The MIT License (MIT)
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Copyright (c) 2015-present 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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Some documentation to refer to:
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- Our main web socket (mWS) sends opcode 4 with a guild ID and channel ID.
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- The mWS receives VOICE_STATE_UPDATE and VOICE_SERVER_UPDATE.
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- We pull the session_id from VOICE_STATE_UPDATE.
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- We pull the token, endpoint and server_id from VOICE_SERVER_UPDATE.
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- Then we initiate the voice web socket (vWS) pointing to the endpoint.
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- We send opcode 0 with the user_id, server_id, session_id and token using the vWS.
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- The vWS sends back opcode 2 with an ssrc, port, modes(array) and heartbeat_interval.
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- We send a UDP discovery packet to endpoint:port and receive our IP and our port in LE.
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- Then we send our IP and port via vWS with opcode 1.
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- When that's all done, we receive opcode 4 from the vWS.
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- Finally we can transmit data to endpoint:port.
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"""
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from __future__ import annotations
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import asyncio
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import socket
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import logging
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import struct
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import threading
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from typing import Any, Callable, List, Optional, TYPE_CHECKING, Tuple, Union
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from . import opus, utils
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from .backoff import ExponentialBackoff
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from .gateway import *
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from .errors import ClientException, ConnectionClosed
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from .player import AudioPlayer, AudioSource
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from .utils import MISSING
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if TYPE_CHECKING:
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from .client import Client
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from .guild import Guild
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from .state import ConnectionState
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from .user import ClientUser
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from .opus import Encoder
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from .channel import StageChannel, VoiceChannel
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from . import abc
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from .types.voice import (
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GuildVoiceState as GuildVoiceStatePayload,
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VoiceServerUpdate as VoiceServerUpdatePayload,
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SupportedModes,
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)
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VocalGuildChannel = Union[VoiceChannel, StageChannel]
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has_nacl: bool
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try:
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import nacl.secret # type: ignore
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import nacl.utils # type: ignore
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has_nacl = True
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except ImportError:
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has_nacl = False
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__all__ = (
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'VoiceProtocol',
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'VoiceClient',
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)
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_log = logging.getLogger(__name__)
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class VoiceProtocol:
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"""A class that represents the Discord voice protocol.
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This is an abstract class. The library provides a concrete implementation
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under :class:`VoiceClient`.
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This class allows you to implement a protocol to allow for an external
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method of sending voice, such as Lavalink_ or a native library implementation.
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These classes are passed to :meth:`abc.Connectable.connect <VoiceChannel.connect>`.
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.. _Lavalink: https://github.com/freyacodes/Lavalink
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Parameters
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------------
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client: :class:`Client`
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The client (or its subclasses) that started the connection request.
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channel: :class:`abc.Connectable`
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The voice channel that is being connected to.
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"""
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def __init__(self, client: Client, channel: abc.Connectable) -> None:
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self.client: Client = client
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self.channel: abc.Connectable = channel
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async def on_voice_state_update(self, data: GuildVoiceStatePayload) -> None:
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"""|coro|
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An abstract method that is called when the client's voice state
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has changed. This corresponds to ``VOICE_STATE_UPDATE``.
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Parameters
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------------
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data: :class:`dict`
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The raw :ddocs:`voice state payload <resources/voice#voice-state-object>`.
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"""
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raise NotImplementedError
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async def on_voice_server_update(self, data: VoiceServerUpdatePayload) -> None:
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"""|coro|
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An abstract method that is called when initially connecting to voice.
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This corresponds to ``VOICE_SERVER_UPDATE``.
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Parameters
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------------
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data: :class:`dict`
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The raw :ddocs:`voice server update payload <topics/gateway#voice-server-update>`.
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"""
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raise NotImplementedError
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async def connect(self, *, timeout: float, reconnect: bool, self_deaf: bool = False, self_mute: bool = False) -> None:
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"""|coro|
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An abstract method called when the client initiates the connection request.
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When a connection is requested initially, the library calls the constructor
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under ``__init__`` and then calls :meth:`connect`. If :meth:`connect` fails at
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some point then :meth:`disconnect` is called.
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Within this method, to start the voice connection flow it is recommended to
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use :meth:`Guild.change_voice_state` to start the flow. After which,
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:meth:`on_voice_server_update` and :meth:`on_voice_state_update` will be called.
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The order that these two are called is unspecified.
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Parameters
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------------
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timeout: :class:`float`
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The timeout for the connection.
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reconnect: :class:`bool`
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Whether reconnection is expected.
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self_mute: :class:`bool`
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Indicates if the client should be self-muted.
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.. versionadded:: 2.0
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self_deaf: :class:`bool`
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Indicates if the client should be self-deafened.
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.. versionadded:: 2.0
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"""
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raise NotImplementedError
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async def disconnect(self, *, force: bool) -> None:
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"""|coro|
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An abstract method called when the client terminates the connection.
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See :meth:`cleanup`.
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Parameters
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------------
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force: :class:`bool`
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Whether the disconnection was forced.
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"""
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raise NotImplementedError
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def cleanup(self) -> None:
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"""This method *must* be called to ensure proper clean-up during a disconnect.
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It is advisable to call this from within :meth:`disconnect` when you are
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completely done with the voice protocol instance.
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This method removes it from the internal state cache that keeps track of
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currently alive voice clients. Failure to clean-up will cause subsequent
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connections to report that it's still connected.
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"""
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key_id, _ = self.channel._get_voice_client_key()
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self.client._connection._remove_voice_client(key_id)
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class VoiceClient(VoiceProtocol):
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"""Represents a Discord voice connection.
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You do not create these, you typically get them from
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e.g. :meth:`VoiceChannel.connect`.
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Warning
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--------
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In order to use PCM based AudioSources, you must have the opus library
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installed on your system and loaded through :func:`opus.load_opus`.
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Otherwise, your AudioSources must be opus encoded (e.g. using :class:`FFmpegOpusAudio`)
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or the library will not be able to transmit audio.
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Attributes
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-----------
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session_id: :class:`str`
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The voice connection session ID.
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token: :class:`str`
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The voice connection token.
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endpoint: :class:`str`
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The endpoint we are connecting to.
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channel: Union[:class:`VoiceChannel`, :class:`StageChannel`]
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The voice channel connected to.
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"""
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channel: VocalGuildChannel
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endpoint_ip: str
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voice_port: int
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ip: str
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port: int
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secret_key: List[int]
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ssrc: int
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def __init__(self, client: Client, channel: abc.Connectable) -> None:
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if not has_nacl:
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raise RuntimeError("PyNaCl library needed in order to use voice")
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super().__init__(client, channel)
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state = client._connection
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self.token: str = MISSING
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self.server_id: int = MISSING
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self.socket = MISSING
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self.loop: asyncio.AbstractEventLoop = state.loop
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self._state: ConnectionState = state
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# this will be used in the AudioPlayer thread
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self._connected: threading.Event = threading.Event()
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self._handshaking: bool = False
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self._potentially_reconnecting: bool = False
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self._voice_state_complete: asyncio.Event = asyncio.Event()
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self._voice_server_complete: asyncio.Event = asyncio.Event()
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self.mode: str = MISSING
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self._connections: int = 0
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self.sequence: int = 0
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self.timestamp: int = 0
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self.timeout: float = 0
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self._runner: asyncio.Task = MISSING
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self._player: Optional[AudioPlayer] = None
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self.encoder: Encoder = MISSING
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self._lite_nonce: int = 0
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self.ws: DiscordVoiceWebSocket = MISSING
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warn_nacl: bool = not has_nacl
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supported_modes: Tuple[SupportedModes, ...] = (
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'xsalsa20_poly1305_lite',
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'xsalsa20_poly1305_suffix',
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'xsalsa20_poly1305',
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)
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@property
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def guild(self) -> Guild:
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""":class:`Guild`: The guild we're connected to."""
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return self.channel.guild
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@property
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def user(self) -> ClientUser:
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""":class:`ClientUser`: The user connected to voice (i.e. ourselves)."""
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return self._state.user # type: ignore
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def checked_add(self, attr: str, value: int, limit: int) -> None:
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val = getattr(self, attr)
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if val + value > limit:
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setattr(self, attr, 0)
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else:
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setattr(self, attr, val + value)
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# connection related
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async def on_voice_state_update(self, data: GuildVoiceStatePayload) -> None:
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self.session_id: str = data['session_id']
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channel_id = data['channel_id']
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if not self._handshaking or self._potentially_reconnecting:
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# If we're done handshaking then we just need to update ourselves
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# If we're potentially reconnecting due to a 4014, then we need to differentiate
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# a channel move and an actual force disconnect
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if channel_id is None:
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# We're being disconnected so cleanup
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await self.disconnect()
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else:
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self.channel = channel_id and self.guild.get_channel(int(channel_id)) # type: ignore
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else:
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self._voice_state_complete.set()
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async def on_voice_server_update(self, data: VoiceServerUpdatePayload) -> None:
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if self._voice_server_complete.is_set():
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_log.warning('Ignoring extraneous voice server update.')
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return
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self.token = data['token']
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self.server_id = int(data['guild_id'])
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endpoint = data.get('endpoint')
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if endpoint is None or self.token is None:
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_log.warning(
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'Awaiting endpoint... This requires waiting. '
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'If timeout occurred considering raising the timeout and reconnecting.'
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)
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return
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self.endpoint, _, _ = endpoint.rpartition(':')
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if self.endpoint.startswith('wss://'):
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# Just in case, strip it off since we're going to add it later
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self.endpoint: str = self.endpoint[6:]
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# This gets set later
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self.endpoint_ip = MISSING
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self.socket: socket.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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self.socket.setblocking(False)
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if not self._handshaking:
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# If we're not handshaking then we need to terminate our previous connection in the websocket
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await self.ws.close(4000)
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return
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self._voice_server_complete.set()
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async def voice_connect(self, self_deaf: bool = False, self_mute: bool = False) -> None:
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await self.channel.guild.change_voice_state(channel=self.channel, self_deaf=self_deaf, self_mute=self_mute)
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async def voice_disconnect(self) -> None:
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_log.info('The voice handshake is being terminated for Channel ID %s (Guild ID %s)', self.channel.id, self.guild.id)
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await self.channel.guild.change_voice_state(channel=None)
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def prepare_handshake(self) -> None:
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self._voice_state_complete.clear()
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self._voice_server_complete.clear()
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self._handshaking = True
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_log.info('Starting voice handshake... (connection attempt %d)', self._connections + 1)
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self._connections += 1
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def finish_handshake(self) -> None:
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_log.info('Voice handshake complete. Endpoint found %s', self.endpoint)
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self._handshaking = False
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self._voice_server_complete.clear()
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self._voice_state_complete.clear()
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async def connect_websocket(self) -> DiscordVoiceWebSocket:
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ws = await DiscordVoiceWebSocket.from_client(self)
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self._connected.clear()
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while ws.secret_key is None:
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await ws.poll_event()
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self._connected.set()
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return ws
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async def connect(self, *, reconnect: bool, timeout: float, self_deaf: bool = False, self_mute: bool = False) -> None:
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_log.info('Connecting to voice...')
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self.timeout = timeout
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for i in range(5):
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self.prepare_handshake()
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# This has to be created before we start the flow.
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futures = [
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self._voice_state_complete.wait(),
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self._voice_server_complete.wait(),
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]
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# Start the connection flow
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await self.voice_connect(self_deaf=self_deaf, self_mute=self_mute)
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try:
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await utils.sane_wait_for(futures, timeout=timeout)
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except asyncio.TimeoutError:
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await self.disconnect(force=True)
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raise
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self.finish_handshake()
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try:
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self.ws = await self.connect_websocket()
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break
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except (ConnectionClosed, asyncio.TimeoutError):
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if reconnect:
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_log.exception('Failed to connect to voice... Retrying...')
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await asyncio.sleep(1 + i * 2.0)
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await self.voice_disconnect()
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continue
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else:
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raise
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if self._runner is MISSING:
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self._runner = self.client.loop.create_task(self.poll_voice_ws(reconnect))
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async def potential_reconnect(self) -> bool:
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# Attempt to stop the player thread from playing early
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self._connected.clear()
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self.prepare_handshake()
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self._potentially_reconnecting = True
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try:
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# We only care about VOICE_SERVER_UPDATE since VOICE_STATE_UPDATE can come before we get disconnected
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await asyncio.wait_for(self._voice_server_complete.wait(), timeout=self.timeout)
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except asyncio.TimeoutError:
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self._potentially_reconnecting = False
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await self.disconnect(force=True)
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return False
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self.finish_handshake()
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self._potentially_reconnecting = False
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try:
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self.ws = await self.connect_websocket()
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except (ConnectionClosed, asyncio.TimeoutError):
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return False
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else:
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return True
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@property
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def latency(self) -> float:
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""":class:`float`: Latency between a HEARTBEAT and a HEARTBEAT_ACK in seconds.
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This could be referred to as the Discord Voice WebSocket latency and is
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an analogue of user's voice latencies as seen in the Discord client.
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.. versionadded:: 1.4
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"""
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ws = self.ws
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return float("inf") if not ws else ws.latency
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@property
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def average_latency(self) -> float:
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""":class:`float`: Average of most recent 20 HEARTBEAT latencies in seconds.
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.. versionadded:: 1.4
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"""
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ws = self.ws
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return float("inf") if not ws else ws.average_latency
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async def poll_voice_ws(self, reconnect: bool) -> None:
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backoff = ExponentialBackoff()
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while True:
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try:
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await self.ws.poll_event()
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except (ConnectionClosed, asyncio.TimeoutError) as exc:
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if isinstance(exc, ConnectionClosed):
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# The following close codes are undocumented so I will document them here.
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# 1000 - normal closure (obviously)
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# 4014 - voice channel has been deleted.
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# 4015 - voice server has crashed
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if exc.code in (1000, 4015):
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_log.info('Disconnecting from voice normally, close code %d.', exc.code)
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await self.disconnect()
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break
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if exc.code == 4014:
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_log.info('Disconnected from voice by force... potentially reconnecting.')
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successful = await self.potential_reconnect()
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if not successful:
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_log.info('Reconnect was unsuccessful, disconnecting from voice normally...')
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await self.disconnect()
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break
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else:
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continue
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if not reconnect:
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await self.disconnect()
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raise
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retry = backoff.delay()
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_log.exception('Disconnected from voice... Reconnecting in %.2fs.', retry)
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self._connected.clear()
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await asyncio.sleep(retry)
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await self.voice_disconnect()
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try:
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await self.connect(reconnect=True, timeout=self.timeout)
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except asyncio.TimeoutError:
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# at this point we've retried 5 times... let's continue the loop.
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_log.warning('Could not connect to voice... Retrying...')
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continue
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async def disconnect(self, *, force: bool = False) -> None:
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"""|coro|
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Disconnects this voice client from voice.
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"""
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if not force and not self.is_connected():
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return
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self.stop()
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self._connected.clear()
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try:
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if self.ws:
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await self.ws.close()
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await self.voice_disconnect()
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finally:
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self.cleanup()
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if self.socket:
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self.socket.close()
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async def move_to(self, channel: Optional[abc.Snowflake]) -> None:
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"""|coro|
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Moves you to a different voice channel.
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Parameters
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-----------
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channel: Optional[:class:`abc.Snowflake`]
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The channel to move to. Must be a voice channel.
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"""
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await self.channel.guild.change_voice_state(channel=channel)
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def is_connected(self) -> bool:
|
|
"""Indicates if the voice client is connected to voice."""
|
|
return self._connected.is_set()
|
|
|
|
# audio related
|
|
|
|
def _get_voice_packet(self, data):
|
|
header = bytearray(12)
|
|
|
|
# Formulate rtp header
|
|
header[0] = 0x80
|
|
header[1] = 0x78
|
|
struct.pack_into('>H', header, 2, self.sequence)
|
|
struct.pack_into('>I', header, 4, self.timestamp)
|
|
struct.pack_into('>I', header, 8, self.ssrc)
|
|
|
|
encrypt_packet = getattr(self, '_encrypt_' + self.mode)
|
|
return encrypt_packet(header, data)
|
|
|
|
def _encrypt_xsalsa20_poly1305(self, header: bytes, data) -> bytes:
|
|
box = nacl.secret.SecretBox(bytes(self.secret_key))
|
|
nonce = bytearray(24)
|
|
nonce[:12] = header
|
|
|
|
return header + box.encrypt(bytes(data), bytes(nonce)).ciphertext
|
|
|
|
def _encrypt_xsalsa20_poly1305_suffix(self, header: bytes, data) -> bytes:
|
|
box = nacl.secret.SecretBox(bytes(self.secret_key))
|
|
nonce = nacl.utils.random(nacl.secret.SecretBox.NONCE_SIZE)
|
|
|
|
return header + box.encrypt(bytes(data), nonce).ciphertext + nonce
|
|
|
|
def _encrypt_xsalsa20_poly1305_lite(self, header: bytes, data) -> bytes:
|
|
box = nacl.secret.SecretBox(bytes(self.secret_key))
|
|
nonce = bytearray(24)
|
|
|
|
nonce[:4] = struct.pack('>I', self._lite_nonce)
|
|
self.checked_add('_lite_nonce', 1, 4294967295)
|
|
|
|
return header + box.encrypt(bytes(data), bytes(nonce)).ciphertext + nonce[:4]
|
|
|
|
def play(self, source: AudioSource, *, after: Optional[Callable[[Optional[Exception]], Any]] = None) -> None:
|
|
"""Plays an :class:`AudioSource`.
|
|
|
|
The finalizer, ``after`` is called after the source has been exhausted
|
|
or an error occurred.
|
|
|
|
If an error happens while the audio player is running, the exception is
|
|
caught and the audio player is then stopped. If no after callback is
|
|
passed, any caught exception will be logged using the library logger.
|
|
|
|
.. versionchanged:: 2.0
|
|
Instead of writing to ``sys.stderr``, the library's logger is used.
|
|
|
|
Parameters
|
|
-----------
|
|
source: :class:`AudioSource`
|
|
The audio source we're reading from.
|
|
after: Callable[[Optional[:class:`Exception`]], Any]
|
|
The finalizer that is called after the stream is exhausted.
|
|
This function must have a single parameter, ``error``, that
|
|
denotes an optional exception that was raised during playing.
|
|
|
|
Raises
|
|
-------
|
|
ClientException
|
|
Already playing audio or not connected.
|
|
TypeError
|
|
Source is not a :class:`AudioSource` or after is not a callable.
|
|
OpusNotLoaded
|
|
Source is not opus encoded and opus is not loaded.
|
|
"""
|
|
|
|
if not self.is_connected():
|
|
raise ClientException('Not connected to voice.')
|
|
|
|
if self.is_playing():
|
|
raise ClientException('Already playing audio.')
|
|
|
|
if not isinstance(source, AudioSource):
|
|
raise TypeError(f'source must be an AudioSource not {source.__class__.__name__}')
|
|
|
|
if not self.encoder and not source.is_opus():
|
|
self.encoder = opus.Encoder()
|
|
|
|
self._player = AudioPlayer(source, self, after=after)
|
|
self._player.start()
|
|
|
|
def is_playing(self) -> bool:
|
|
"""Indicates if we're currently playing audio."""
|
|
return self._player is not None and self._player.is_playing()
|
|
|
|
def is_paused(self) -> bool:
|
|
"""Indicates if we're playing audio, but if we're paused."""
|
|
return self._player is not None and self._player.is_paused()
|
|
|
|
def stop(self) -> None:
|
|
"""Stops playing audio."""
|
|
if self._player:
|
|
self._player.stop()
|
|
self._player = None
|
|
|
|
def pause(self) -> None:
|
|
"""Pauses the audio playing."""
|
|
if self._player:
|
|
self._player.pause()
|
|
|
|
def resume(self) -> None:
|
|
"""Resumes the audio playing."""
|
|
if self._player:
|
|
self._player.resume()
|
|
|
|
@property
|
|
def source(self) -> Optional[AudioSource]:
|
|
"""Optional[:class:`AudioSource`]: The audio source being played, if playing.
|
|
|
|
This property can also be used to change the audio source currently being played.
|
|
"""
|
|
return self._player.source if self._player else None
|
|
|
|
@source.setter
|
|
def source(self, value: AudioSource) -> None:
|
|
if not isinstance(value, AudioSource):
|
|
raise TypeError(f'expected AudioSource not {value.__class__.__name__}.')
|
|
|
|
if self._player is None:
|
|
raise ValueError('Not playing anything.')
|
|
|
|
self._player._set_source(value)
|
|
|
|
def send_audio_packet(self, data: bytes, *, encode: bool = True) -> None:
|
|
"""Sends an audio packet composed of the data.
|
|
|
|
You must be connected to play audio.
|
|
|
|
Parameters
|
|
----------
|
|
data: :class:`bytes`
|
|
The :term:`py:bytes-like object` denoting PCM or Opus voice data.
|
|
encode: :class:`bool`
|
|
Indicates if ``data`` should be encoded into Opus.
|
|
|
|
Raises
|
|
-------
|
|
ClientException
|
|
You are not connected.
|
|
opus.OpusError
|
|
Encoding the data failed.
|
|
"""
|
|
|
|
self.checked_add('sequence', 1, 65535)
|
|
if encode:
|
|
encoded_data = self.encoder.encode(data, self.encoder.SAMPLES_PER_FRAME)
|
|
else:
|
|
encoded_data = data
|
|
packet = self._get_voice_packet(encoded_data)
|
|
try:
|
|
self.socket.sendto(packet, (self.endpoint_ip, self.voice_port))
|
|
except BlockingIOError:
|
|
_log.warning('A packet has been dropped (seq: %s, timestamp: %s)', self.sequence, self.timestamp)
|
|
|
|
self.checked_add('timestamp', opus.Encoder.SAMPLES_PER_FRAME, 4294967295)
|