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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ"""WebSocket client for asyncio.""" import asyncio from typing import Any, Optional, cast import async_timeout from .client_exceptions import ClientError from .client_reqrep import ClientResponse from .helpers import call_later, set_result from .http import ( WS_CLOSED_MESSAGE, WS_CLOSING_MESSAGE, WebSocketError, WSCloseCode, WSMessage, WSMsgType, ) from .http_websocket import WebSocketWriter # WSMessage from .streams import EofStream, FlowControlDataQueue from .typedefs import ( DEFAULT_JSON_DECODER, DEFAULT_JSON_ENCODER, JSONDecoder, JSONEncoder, ) class ClientWebSocketResponse: def __init__( self, reader: "FlowControlDataQueue[WSMessage]", writer: WebSocketWriter, protocol: Optional[str], response: ClientResponse, timeout: float, autoclose: bool, autoping: bool, loop: asyncio.AbstractEventLoop, *, receive_timeout: Optional[float] = None, heartbeat: Optional[float] = None, compress: int = 0, client_notakeover: bool = False, ) -> None: self._response = response self._conn = response.connection self._writer = writer self._reader = reader self._protocol = protocol self._closed = False self._closing = False self._close_code: Optional[int] = None self._timeout = timeout self._receive_timeout = receive_timeout self._autoclose = autoclose self._autoping = autoping self._heartbeat = heartbeat self._heartbeat_cb: Optional[asyncio.TimerHandle] = None if heartbeat is not None: self._pong_heartbeat = heartbeat / 2.0 self._pong_response_cb: Optional[asyncio.TimerHandle] = None self._loop = loop self._waiting: Optional[asyncio.Future[bool]] = None self._exception: Optional[BaseException] = None self._compress = compress self._client_notakeover = client_notakeover self._reset_heartbeat() def _cancel_heartbeat(self) -> None: if self._pong_response_cb is not None: self._pong_response_cb.cancel() self._pong_response_cb = None if self._heartbeat_cb is not None: self._heartbeat_cb.cancel() self._heartbeat_cb = None def _reset_heartbeat(self) -> None: self._cancel_heartbeat() if self._heartbeat is not None: self._heartbeat_cb = call_later( self._send_heartbeat, self._heartbeat, self._loop ) def _send_heartbeat(self) -> None: if self._heartbeat is not None and not self._closed: # fire-and-forget a task is not perfect but maybe ok for # sending ping. Otherwise we need a long-living heartbeat # task in the class. self._loop.create_task(self._writer.ping()) if self._pong_response_cb is not None: self._pong_response_cb.cancel() self._pong_response_cb = call_later( self._pong_not_received, self._pong_heartbeat, self._loop ) def _pong_not_received(self) -> None: if not self._closed: self._closed = True self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = asyncio.TimeoutError() self._response.close() @property def closed(self) -> bool: return self._closed @property def close_code(self) -> Optional[int]: return self._close_code @property def protocol(self) -> Optional[str]: return self._protocol @property def compress(self) -> int: return self._compress @property def client_notakeover(self) -> bool: return self._client_notakeover def get_extra_info(self, name: str, default: Any = None) -> Any: """extra info from connection transport""" conn = self._response.connection if conn is None: return default transport = conn.transport if transport is None: return default return transport.get_extra_info(name, default) def exception(self) -> Optional[BaseException]: return self._exception async def ping(self, message: bytes = b"") -> None: await self._writer.ping(message) async def pong(self, message: bytes = b"") -> None: await self._writer.pong(message) async def send_str(self, data: str, compress: Optional[int] = None) -> None: if not isinstance(data, str): raise TypeError("data argument must be str (%r)" % type(data)) await self._writer.send(data, binary=False, compress=compress) async def send_bytes(self, data: bytes, compress: Optional[int] = None) -> None: if not isinstance(data, (bytes, bytearray, memoryview)): raise TypeError("data argument must be byte-ish (%r)" % type(data)) await self._writer.send(data, binary=True, compress=compress) async def send_json( self, data: Any, compress: Optional[int] = None, *, dumps: JSONEncoder = DEFAULT_JSON_ENCODER, ) -> None: await self.send_str(dumps(data), compress=compress) async def close(self, *, code: int = WSCloseCode.OK, message: bytes = b"") -> bool: # we need to break `receive()` cycle first, # `close()` may be called from different task if self._waiting is not None and not self._closed: self._reader.feed_data(WS_CLOSING_MESSAGE, 0) await self._waiting if not self._closed: self._cancel_heartbeat() self._closed = True try: await self._writer.close(code, message) except asyncio.CancelledError: self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._response.close() raise except Exception as exc: self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = exc self._response.close() return True if self._closing: self._response.close() return True while True: try: async with async_timeout.timeout(self._timeout): msg = await self._reader.read() except asyncio.CancelledError: self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._response.close() raise except Exception as exc: self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = exc self._response.close() return True if msg.type == WSMsgType.CLOSE: self._close_code = msg.data self._response.close() return True else: return False async def receive(self, timeout: Optional[float] = None) -> WSMessage: while True: if self._waiting is not None: raise RuntimeError("Concurrent call to receive() is not allowed") if self._closed: return WS_CLOSED_MESSAGE elif self._closing: await self.close() return WS_CLOSED_MESSAGE try: self._waiting = self._loop.create_future() try: async with async_timeout.timeout(timeout or self._receive_timeout): msg = await self._reader.read() self._reset_heartbeat() finally: waiter = self._waiting self._waiting = None set_result(waiter, True) except (asyncio.CancelledError, asyncio.TimeoutError): self._close_code = WSCloseCode.ABNORMAL_CLOSURE raise except EofStream: self._close_code = WSCloseCode.OK await self.close() return WSMessage(WSMsgType.CLOSED, None, None) except ClientError: self._closed = True self._close_code = WSCloseCode.ABNORMAL_CLOSURE return WS_CLOSED_MESSAGE except WebSocketError as exc: self._close_code = exc.code await self.close(code=exc.code) return WSMessage(WSMsgType.ERROR, exc, None) except Exception as exc: self._exception = exc self._closing = True self._close_code = WSCloseCode.ABNORMAL_CLOSURE await self.close() return WSMessage(WSMsgType.ERROR, exc, None) if msg.type == WSMsgType.CLOSE: self._closing = True self._close_code = msg.data if not self._closed and self._autoclose: await self.close() elif msg.type == WSMsgType.CLOSING: self._closing = True elif msg.type == WSMsgType.PING and self._autoping: await self.pong(msg.data) continue elif msg.type == WSMsgType.PONG and self._autoping: continue return msg async def receive_str(self, *, timeout: Optional[float] = None) -> str: msg = await self.receive(timeout) if msg.type != WSMsgType.TEXT: raise TypeError(f"Received message {msg.type}:{msg.data!r} is not str") return cast(str, msg.data) async def receive_bytes(self, *, timeout: Optional[float] = None) -> bytes: msg = await self.receive(timeout) if msg.type != WSMsgType.BINARY: raise TypeError(f"Received message {msg.type}:{msg.data!r} is not bytes") return cast(bytes, msg.data) async def receive_json( self, *, loads: JSONDecoder = DEFAULT_JSON_DECODER, timeout: Optional[float] = None, ) -> Any: data = await self.receive_str(timeout=timeout) return loads(data) def __aiter__(self) -> "ClientWebSocketResponse": return self async def __anext__(self) -> WSMessage: msg = await self.receive() if msg.type in (WSMsgType.CLOSE, WSMsgType.CLOSING, WSMsgType.CLOSED): raise StopAsyncIteration return msg