Загрузить файлы в «venv/Lib/site-packages/uvicorn/protocols/websockets»

venv/Lib/site-packages/uvicorn/protocols/websockets/auto.py

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+from __future__ import annotations
+
+import asyncio
+from collections.abc import Callable
+
+AutoWebSocketsProtocol: Callable[..., asyncio.Protocol] | None
+try:
+    import websockets  # noqa
+except ImportError:  # pragma: no cover
+    try:
+        import wsproto  # noqa
+    except ImportError:
+        AutoWebSocketsProtocol = None
+    else:
+        from uvicorn.protocols.websockets.wsproto_impl import WSProtocol
+
+        AutoWebSocketsProtocol = WSProtocol
+else:
+    from uvicorn.protocols.websockets.websockets_impl import WebSocketProtocol
+
+    AutoWebSocketsProtocol = WebSocketProtocol

venv/Lib/site-packages/uvicorn/protocols/websockets/websockets_impl.py

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+from __future__ import annotations
+
+import asyncio
+import http
+import logging
+from collections.abc import Sequence
+from typing import Any, Literal, cast
+from urllib.parse import unquote
+
+import websockets
+import websockets.legacy.handshake
+from websockets.datastructures import Headers
+from websockets.exceptions import ConnectionClosed
+from websockets.extensions.base import ServerExtensionFactory
+from websockets.extensions.permessage_deflate import ServerPerMessageDeflateFactory
+from websockets.legacy.server import HTTPResponse
+from websockets.server import WebSocketServerProtocol
+from websockets.typing import Subprotocol
+
+from uvicorn._types import (
+    ASGI3Application,
+    ASGISendEvent,
+    WebSocketConnectEvent,
+    WebSocketDisconnectEvent,
+    WebSocketReceiveEvent,
+    WebSocketScope,
+)
+from uvicorn.config import Config
+from uvicorn.logging import TRACE_LOG_LEVEL
+from uvicorn.protocols.utils import (
+    ClientDisconnected,
+    get_client_addr,
+    get_local_addr,
+    get_path_with_query_string,
+    get_remote_addr,
+    is_ssl,
+)
+from uvicorn.server import ServerState
+
+
+class Server:
+    closing = False
+
+    def register(self, ws: WebSocketServerProtocol) -> None:
+        pass
+
+    def unregister(self, ws: WebSocketServerProtocol) -> None:
+        pass
+
+    def is_serving(self) -> bool:
+        return not self.closing
+
+
+class WebSocketProtocol(WebSocketServerProtocol):
+    extra_headers: list[tuple[str, str]]
+    logger: logging.Logger | logging.LoggerAdapter[Any]
+
+    def __init__(
+        self,
+        config: Config,
+        server_state: ServerState,
+        app_state: dict[str, Any],
+        _loop: asyncio.AbstractEventLoop | None = None,
+    ):
+        if not config.loaded:
+            config.load()
+
+        self.config = config
+        self.app = cast(ASGI3Application, config.loaded_app)
+        self.loop = _loop or asyncio.get_event_loop()
+        self.root_path = config.root_path
+        self.app_state = app_state
+
+        # Shared server state
+        self.connections = server_state.connections
+        self.tasks = server_state.tasks
+
+        # Connection state
+        self.transport: asyncio.Transport = None  # type: ignore[assignment]
+        self.server: tuple[str, int | None] | None = None
+        self.client: tuple[str, int] | None = None
+        self.scheme: Literal["wss", "ws"] = None  # type: ignore[assignment]
+
+        # Connection events
+        self.scope: WebSocketScope
+        self.handshake_started_event = asyncio.Event()
+        self.handshake_completed_event = asyncio.Event()
+        self.closed_event = asyncio.Event()
+        self.initial_response: HTTPResponse | None = None
+        self.connect_sent = False
+        self.lost_connection_before_handshake = False
+        self.accepted_subprotocol: Subprotocol | None = None
+
+        self.ws_server: Server = Server()  # type: ignore[assignment]
+
+        extensions: list[ServerExtensionFactory] = []
+        if self.config.ws_per_message_deflate:
+            extensions.append(ServerPerMessageDeflateFactory())
+
+        super().__init__(
+            ws_handler=self.ws_handler,
+            ws_server=self.ws_server,  # type: ignore[arg-type]
+            max_size=self.config.ws_max_size,
+            max_queue=self.config.ws_max_queue,
+            ping_interval=self.config.ws_ping_interval,
+            ping_timeout=self.config.ws_ping_timeout,
+            extensions=extensions,
+            logger=logging.getLogger("uvicorn.error"),
+        )
+        self.server_header = None
+        self.extra_headers = [
+            (name.decode("latin-1"), value.decode("latin-1")) for name, value in server_state.default_headers
+        ]
+
+    def connection_made(  # type: ignore[override]
+        self, transport: asyncio.Transport
+    ) -> None:
+        self.connections.add(self)
+        self.transport = transport
+        self.server = get_local_addr(transport)
+        self.client = get_remote_addr(transport)
+        self.scheme = "wss" if is_ssl(transport) else "ws"
+
+        if self.logger.isEnabledFor(TRACE_LOG_LEVEL):
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket connection made", prefix)
+
+        super().connection_made(transport)
+
+    def connection_lost(self, exc: Exception | None) -> None:
+        self.connections.remove(self)
+
+        if self.logger.isEnabledFor(TRACE_LOG_LEVEL):
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket connection lost", prefix)
+
+        self.lost_connection_before_handshake = not self.handshake_completed_event.is_set()
+        self.handshake_completed_event.set()
+        super().connection_lost(exc)
+        if exc is None:
+            self.transport.close()
+
+    def shutdown(self) -> None:
+        self.ws_server.closing = True
+        if self.handshake_completed_event.is_set():
+            self.fail_connection(1012)
+        else:
+            self.send_500_response()
+        self.transport.close()
+
+    def on_task_complete(self, task: asyncio.Task[None]) -> None:
+        self.tasks.discard(task)
+
+    async def process_request(self, path: str, request_headers: Headers) -> HTTPResponse | None:
+        """
+        This hook is called to determine if the websocket should return
+        an HTTP response and close.
+
+        Our behavior here is to start the ASGI application, and then wait
+        for either `accept` or `close` in order to determine if we should
+        close the connection.
+        """
+        path_portion, _, query_string = path.partition("?")
+
+        websockets.legacy.handshake.check_request(request_headers)
+
+        subprotocols: list[str] = []
+        for header in request_headers.get_all("Sec-WebSocket-Protocol"):
+            subprotocols.extend([token.strip() for token in header.split(",")])
+
+        asgi_headers = [
+            (name.encode("ascii"), value.encode("ascii", errors="surrogateescape"))
+            for name, value in request_headers.raw_items()
+        ]
+        path = unquote(path_portion)
+        full_path = self.root_path + path
+        full_raw_path = self.root_path.encode("ascii") + path_portion.encode("ascii")
+
+        self.scope = {
+            "type": "websocket",
+            "asgi": {"version": self.config.asgi_version, "spec_version": "2.4"},
+            "http_version": "1.1",
+            "scheme": self.scheme,
+            "server": self.server,
+            "client": self.client,
+            "root_path": self.root_path,
+            "path": full_path,
+            "raw_path": full_raw_path,
+            "query_string": query_string.encode("ascii"),
+            "headers": asgi_headers,
+            "subprotocols": subprotocols,
+            "state": self.app_state.copy(),
+            "extensions": {"websocket.http.response": {}},
+        }
+        task = self.loop.create_task(self.run_asgi())
+        task.add_done_callback(self.on_task_complete)
+        self.tasks.add(task)
+        await self.handshake_started_event.wait()
+        return self.initial_response
+
+    def process_subprotocol(
+        self, headers: Headers, available_subprotocols: Sequence[Subprotocol] | None
+    ) -> Subprotocol | None:
+        """
+        We override the standard 'process_subprotocol' behavior here so that
+        we return whatever subprotocol is sent in the 'accept' message.
+        """
+        return self.accepted_subprotocol
+
+    def send_500_response(self) -> None:
+        msg = b"Internal Server Error"
+        content = [
+            b"HTTP/1.1 500 Internal Server Error\r\ncontent-type: text/plain; charset=utf-8\r\n",
+            b"content-length: " + str(len(msg)).encode("ascii") + b"\r\n",
+            b"connection: close\r\n",
+            b"\r\n",
+            msg,
+        ]
+        self.transport.write(b"".join(content))
+        # Allow handler task to terminate cleanly, as websockets doesn't cancel it by
+        # itself (see https://github.com/Kludex/uvicorn/issues/920)
+        self.handshake_started_event.set()
+
+    async def ws_handler(self, protocol: WebSocketServerProtocol, path: str) -> Any:  # type: ignore[override]
+        """
+        This is the main handler function for the 'websockets' implementation
+        to call into. We just wait for close then return, and instead allow
+        'send' and 'receive' events to drive the flow.
+        """
+        self.handshake_completed_event.set()
+        await self.wait_closed()
+
+    async def run_asgi(self) -> None:
+        """
+        Wrapper around the ASGI callable, handling exceptions and unexpected
+        termination states.
+        """
+        try:
+            result = await self.app(self.scope, self.asgi_receive, self.asgi_send)  # type: ignore[func-returns-value]
+        except ClientDisconnected:  # pragma: full coverage
+            self.closed_event.set()
+        except BaseException:
+            self.closed_event.set()
+            self.logger.exception("Exception in ASGI application\n")
+            if not self.handshake_started_event.is_set():
+                self.send_500_response()
+            else:
+                await self.handshake_completed_event.wait()
+        else:
+            self.closed_event.set()
+            if not self.handshake_started_event.is_set():
+                self.logger.error("ASGI callable returned without sending handshake.")
+                self.send_500_response()
+            elif result is not None:
+                self.logger.error("ASGI callable should return None, but returned '%s'.", result)
+            await self.handshake_completed_event.wait()
+        self.transport.close()
+
+    async def asgi_send(self, message: ASGISendEvent) -> None:
+        if not self.handshake_started_event.is_set():
+            if message["type"] == "websocket.accept":
+                self.logger.info(
+                    '%s - "WebSocket %s" [accepted]',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                )
+                self.initial_response = None
+                self.accepted_subprotocol = cast(Subprotocol | None, message.get("subprotocol"))
+                if "headers" in message:
+                    self.extra_headers.extend(
+                        # ASGI spec requires bytes
+                        # But for compatibility we need to convert it to strings
+                        (name.decode("latin-1"), value.decode("latin-1"))
+                        for name, value in message["headers"]
+                    )
+                self.handshake_started_event.set()
+
+            elif message["type"] == "websocket.close":
+                self.logger.info(
+                    '%s - "WebSocket %s" 403',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                )
+                self.initial_response = (http.HTTPStatus.FORBIDDEN, [], b"")
+                self.handshake_started_event.set()
+                self.closed_event.set()
+
+            elif message["type"] == "websocket.http.response.start":
+                self.logger.info(
+                    '%s - "WebSocket %s" %d',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                    message["status"],
+                )
+                # websockets requires the status to be an enum. look it up.
+                status = http.HTTPStatus(message["status"])
+                headers = [
+                    (name.decode("latin-1"), value.decode("latin-1")) for name, value in message.get("headers", [])
+                ]
+                self.initial_response = (status, headers, b"")
+                self.handshake_started_event.set()
+
+            else:
+                raise RuntimeError(
+                    "Expected ASGI message 'websocket.accept', 'websocket.close', "
+                    f"or 'websocket.http.response.start' but got '{message['type']}'."
+                )
+
+        elif not self.closed_event.is_set() and self.initial_response is None:
+            await self.handshake_completed_event.wait()
+
+            try:
+                if message["type"] == "websocket.send":
+                    bytes_data = message.get("bytes")
+                    text_data = message.get("text")
+                    data = text_data if bytes_data is None else bytes_data
+                    await self.send(data)  # type: ignore[arg-type]
+
+                elif message["type"] == "websocket.close":
+                    code = message.get("code", 1000)
+                    reason = message.get("reason", "") or ""
+                    await self.close(code, reason)
+                    self.closed_event.set()
+
+                else:
+                    raise RuntimeError(
+                        f"Expected ASGI message 'websocket.send' or 'websocket.close', but got '{message['type']}'."
+                    )
+            except ConnectionClosed as exc:
+                raise ClientDisconnected from exc
+
+        elif self.initial_response is not None:
+            if message["type"] == "websocket.http.response.body":
+                body = self.initial_response[2] + message["body"]
+                self.initial_response = self.initial_response[:2] + (body,)
+                if not message.get("more_body", False):
+                    self.closed_event.set()
+            else:
+                raise RuntimeError(f"Expected ASGI message 'websocket.http.response.body' but got '{message['type']}'.")
+
+        else:
+            raise RuntimeError(
+                f"Unexpected ASGI message '{message['type']}', after sending 'websocket.close' "
+                "or response already completed."
+            )
+
+    async def asgi_receive(self) -> WebSocketDisconnectEvent | WebSocketConnectEvent | WebSocketReceiveEvent:
+        if not self.connect_sent:
+            self.connect_sent = True
+            return {"type": "websocket.connect"}
+
+        await self.handshake_completed_event.wait()
+
+        if self.lost_connection_before_handshake:
+            # If the handshake failed or the app closed before handshake completion,
+            # use 1006 Abnormal Closure.
+            return {"type": "websocket.disconnect", "code": 1006}
+
+        if self.closed_event.is_set():
+            return {"type": "websocket.disconnect", "code": 1005}
+
+        try:
+            data = await self.recv()
+        except ConnectionClosed:
+            self.closed_event.set()
+            if self.ws_server.closing:
+                return {"type": "websocket.disconnect", "code": 1012}
+            return {"type": "websocket.disconnect", "code": self.close_code or 1005, "reason": self.close_reason}
+
+        if isinstance(data, str):
+            return {"type": "websocket.receive", "text": data}
+        return {"type": "websocket.receive", "bytes": data}

venv/Lib/site-packages/uvicorn/protocols/websockets/websockets_sansio_impl.py

@@ -0,0 +1,477 @@
+from __future__ import annotations
+
+import asyncio
+import logging
+import random
+import struct
+import sys
+from asyncio import TimerHandle
+from asyncio.transports import BaseTransport, Transport
+from http import HTTPStatus
+from typing import Any, Literal, cast
+from urllib.parse import unquote
+
+from websockets.exceptions import InvalidState
+from websockets.extensions.permessage_deflate import ServerPerMessageDeflateFactory
+from websockets.frames import Frame, Opcode
+from websockets.http11 import Request
+from websockets.server import ServerProtocol
+
+from uvicorn._types import (
+    ASGIReceiveEvent,
+    ASGISendEvent,
+    WebSocketScope,
+)
+from uvicorn.config import Config
+from uvicorn.logging import TRACE_LOG_LEVEL
+from uvicorn.protocols.utils import (
+    ClientDisconnected,
+    get_client_addr,
+    get_local_addr,
+    get_path_with_query_string,
+    get_remote_addr,
+    is_ssl,
+)
+from uvicorn.server import ServerState
+
+if sys.version_info >= (3, 11):  # pragma: no cover
+    from typing import assert_never
+else:  # pragma: no cover
+    from typing_extensions import assert_never
+
+
+class WebSocketsSansIOProtocol(asyncio.Protocol):
+    def __init__(
+        self,
+        config: Config,
+        server_state: ServerState,
+        app_state: dict[str, Any],
+        _loop: asyncio.AbstractEventLoop | None = None,
+    ) -> None:
+        if not config.loaded:
+            config.load()  # pragma: no cover
+
+        self.config = config
+        self.app = config.loaded_app
+        self.loop = _loop or asyncio.get_event_loop()
+        self.logger = logging.getLogger("uvicorn.error")
+        self.root_path = config.root_path
+        self.app_state = app_state
+
+        # Shared server state
+        self.connections = server_state.connections
+        self.tasks = server_state.tasks
+        self.default_headers = server_state.default_headers
+
+        # Connection state
+        self.transport: asyncio.Transport = None  # type: ignore[assignment]
+        self.server: tuple[str, int | None] | None = None
+        self.client: tuple[str, int] | None = None
+        self.scheme: Literal["wss", "ws"] = None  # type: ignore[assignment]
+
+        # WebSocket state
+        self.queue: asyncio.Queue[ASGIReceiveEvent] = asyncio.Queue()
+        self.handshake_initiated = False
+        self.handshake_complete = False
+        self.close_sent = False
+        self.initial_response: tuple[int, list[tuple[str, str]], bytes] | None = None
+
+        extensions = []
+        if self.config.ws_per_message_deflate:
+            extensions = [
+                ServerPerMessageDeflateFactory(
+                    server_max_window_bits=12,
+                    client_max_window_bits=12,
+                    compress_settings={"memLevel": 5},
+                )
+            ]
+        self.conn = ServerProtocol(
+            extensions=extensions,
+            max_size=self.config.ws_max_size,
+            logger=logging.getLogger("uvicorn.error"),
+        )
+
+        self.read_paused = False
+        self.writable = asyncio.Event()
+        self.writable.set()
+
+        # Keepalive state
+        self.ping_interval = config.ws_ping_interval
+        self.ping_timeout = config.ws_ping_timeout
+        self.ping_timer: TimerHandle | None = None
+        self.pong_timer: TimerHandle | None = None
+        self.pending_ping_payload: bytes | None = None
+        self.ping_sent_at: float = 0.0
+        self.last_ping_rtt: float = 0.0
+
+        # Buffers
+        self.bytes = bytearray()
+
+    def connection_made(self, transport: BaseTransport) -> None:
+        """Called when a connection is made."""
+        transport = cast(Transport, transport)
+        self.connections.add(self)
+        self.transport = transport
+        self.server = get_local_addr(transport)
+        self.client = get_remote_addr(transport)
+        self.scheme = "wss" if is_ssl(transport) else "ws"
+
+        if self.logger.level <= TRACE_LOG_LEVEL:
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket connection made", prefix)
+
+    def connection_lost(self, exc: Exception | None) -> None:
+        self.stop_keepalive()
+        code = 1005 if self.handshake_complete else 1006
+        self.queue.put_nowait({"type": "websocket.disconnect", "code": code})
+        self.connections.remove(self)
+
+        if self.logger.level <= TRACE_LOG_LEVEL:
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket connection lost", prefix)
+
+        self.handshake_complete = True
+        if exc is None:
+            self.transport.close()
+
+    def eof_received(self) -> None:
+        pass
+
+    def shutdown(self) -> None:
+        self.stop_keepalive()
+        if self.handshake_complete:
+            self.queue.put_nowait({"type": "websocket.disconnect", "code": 1012})
+            self.conn.send_close(1012)
+            output = self.conn.data_to_send()
+            self.transport.write(b"".join(output))
+        else:
+            self.send_500_response()
+        self.transport.close()
+
+    def data_received(self, data: bytes) -> None:
+        self.conn.receive_data(data)
+        if self.conn.parser_exc is not None:  # pragma: no cover
+            self.handle_parser_exception()
+            return
+        self.handle_events()
+
+    def handle_events(self) -> None:
+        for event in self.conn.events_received():
+            if isinstance(event, Request):
+                self.handle_connect(event)
+            if isinstance(event, Frame):
+                if event.opcode == Opcode.CONT:
+                    self.handle_cont(event)  # pragma: no cover
+                elif event.opcode == Opcode.TEXT:
+                    self.handle_text(event)
+                elif event.opcode == Opcode.BINARY:
+                    self.handle_bytes(event)
+                elif event.opcode == Opcode.PING:
+                    self.handle_ping()
+                elif event.opcode == Opcode.PONG:
+                    self.handle_pong(event)
+                elif event.opcode == Opcode.CLOSE:
+                    self.handle_close(event)
+                else:
+                    assert_never(event.opcode)  # pragma: no cover
+
+    # Event handlers
+
+    def handle_connect(self, event: Request) -> None:
+        self.request = event
+        self.response = self.conn.accept(event)
+        self.handshake_initiated = True
+        if self.response.status_code != 101:
+            self.handshake_complete = True
+            self.close_sent = True
+            self.conn.send_response(self.response)
+            output = self.conn.data_to_send()
+            self.transport.write(b"".join(output))
+            self.transport.close()
+            return
+
+        headers = [
+            (key.encode("ascii"), value.encode("ascii", errors="surrogateescape"))
+            for key, value in event.headers.raw_items()
+        ]
+        raw_path, _, query_string = event.path.partition("?")
+        self.scope: WebSocketScope = {
+            "type": "websocket",
+            "asgi": {"version": self.config.asgi_version, "spec_version": "2.4"},
+            "http_version": "1.1",
+            "scheme": self.scheme,
+            "server": self.server,
+            "client": self.client,
+            "root_path": self.root_path,
+            "path": self.root_path + unquote(raw_path),
+            "raw_path": self.root_path.encode("ascii") + raw_path.encode("ascii"),
+            "query_string": query_string.encode("ascii"),
+            "headers": headers,
+            "subprotocols": event.headers.get_all("Sec-WebSocket-Protocol"),
+            "state": self.app_state.copy(),
+            "extensions": {"websocket.http.response": {}},
+        }
+        self.queue.put_nowait({"type": "websocket.connect"})
+        task = self.loop.create_task(self.run_asgi())
+        task.add_done_callback(self.on_task_complete)
+        self.tasks.add(task)
+
+    def handle_cont(self, event: Frame) -> None:
+        self.bytes.extend(event.data)
+        if event.fin:
+            self.send_receive_event_to_app()
+
+    def handle_text(self, event: Frame) -> None:
+        self.bytes = bytearray(event.data)
+        self.curr_msg_data_type: Literal["text", "bytes"] = "text"
+        if event.fin:
+            self.send_receive_event_to_app()
+
+    def handle_bytes(self, event: Frame) -> None:
+        self.bytes = bytearray(event.data)
+        self.curr_msg_data_type = "bytes"
+        if event.fin:
+            self.send_receive_event_to_app()
+
+    def send_receive_event_to_app(self) -> None:
+        if self.curr_msg_data_type == "text":
+            try:
+                self.queue.put_nowait({"type": "websocket.receive", "text": self.bytes.decode()})
+            except UnicodeDecodeError:  # pragma: no cover
+                self.logger.exception("Invalid UTF-8 sequence received from client.")
+                self.conn.send_close(1007)
+                self.handle_parser_exception()
+                return
+        else:
+            self.queue.put_nowait({"type": "websocket.receive", "bytes": bytes(self.bytes)})
+        if not self.read_paused:
+            self.read_paused = True
+            self.transport.pause_reading()
+
+    def handle_ping(self) -> None:
+        output = self.conn.data_to_send()
+        self.transport.write(b"".join(output))
+
+    def handle_pong(self, event: Frame) -> None:
+        # Ignore unsolicited pongs and stale pongs whose payload doesn't match the ping currently in flight
+        if self.pending_ping_payload is None or bytes(event.data) != self.pending_ping_payload:
+            return  # pragma: no cover
+
+        self.last_ping_rtt = self.loop.time() - self.ping_sent_at
+        self.pending_ping_payload = None
+        # The peer answered in time; cancel the pong deadline and chain the next ping. This `schedule_ping()` call is
+        # what keeps the keepalive loop running when ping_timeout is set. When ping_timeout is None the next ping is
+        # already scheduled by `send_keepalive_ping`, so we must not schedule a duplicate here.
+        if self.pong_timer is not None:
+            self.pong_timer.cancel()
+            self.pong_timer = None
+            self.schedule_ping()
+
+    def start_keepalive(self) -> None:
+        if self.ping_interval is not None and self.ping_interval > 0:
+            self.schedule_ping()
+
+    def stop_keepalive(self) -> None:
+        if self.ping_timer is not None:
+            self.ping_timer.cancel()
+            self.ping_timer = None
+        if self.pong_timer is not None:  # pragma: no cover
+            self.pong_timer.cancel()
+            self.pong_timer = None
+        self.pending_ping_payload = None
+
+    def schedule_ping(self) -> None:
+        assert self.ping_interval is not None
+        delay = max(0.0, self.ping_interval - self.last_ping_rtt)
+        self.ping_timer = self.loop.call_later(delay, self.send_keepalive_ping)
+
+    def send_keepalive_ping(self) -> None:
+        self.ping_timer = None
+        if self.close_sent or self.transport.is_closing():  # pragma: no cover
+            return
+        # Random 4-byte payload identifies this ping; `handle_pong` uses it to ignore stale or unsolicited pongs.
+        # See https://github.com/python-websockets/websockets/blob/4d229bf9f583d593aa103287aee0a77c9fbc3a79/src/websockets/asyncio/connection.py#L624
+        self.pending_ping_payload = struct.pack("!I", random.getrandbits(32))
+        self.ping_sent_at = self.loop.time()
+        self.conn.send_ping(self.pending_ping_payload)
+        self.transport.write(b"".join(self.conn.data_to_send()))
+        if self.ping_timeout is not None:
+            self.pong_timer = self.loop.call_later(self.ping_timeout, self.keepalive_timeout)
+        else:  # pragma: no cover
+            self.schedule_ping()
+
+    def keepalive_timeout(self) -> None:
+        self.pong_timer = None
+        self.pending_ping_payload = None
+        if self.close_sent or self.transport.is_closing():  # pragma: no cover
+            return
+        if self.logger.level <= TRACE_LOG_LEVEL:
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket keepalive ping timeout", prefix)
+        self.conn.fail(1011, "keepalive ping timeout")
+        self.transport.write(b"".join(self.conn.data_to_send()))
+        self.close_sent = True
+        self.transport.close()
+
+    def handle_close(self, event: Frame) -> None:
+        if not self.close_sent and not self.transport.is_closing():
+            assert self.conn.close_rcvd is not None
+            code = self.conn.close_rcvd.code
+            reason = self.conn.close_rcvd.reason
+            self.queue.put_nowait({"type": "websocket.disconnect", "code": code, "reason": reason})
+
+            output = self.conn.data_to_send()
+            self.transport.write(b"".join(output))
+            self.transport.close()
+
+    def handle_parser_exception(self) -> None:  # pragma: no cover
+        assert self.conn.close_sent is not None
+        code = self.conn.close_sent.code
+        reason = self.conn.close_sent.reason
+        self.queue.put_nowait({"type": "websocket.disconnect", "code": code, "reason": reason})
+
+        output = self.conn.data_to_send()
+        self.transport.write(b"".join(output))
+        self.close_sent = True
+        self.transport.close()
+
+    def on_task_complete(self, task: asyncio.Task[None]) -> None:
+        self.tasks.discard(task)
+
+    async def run_asgi(self) -> None:
+        try:
+            result = await self.app(self.scope, self.receive, self.send)
+        except ClientDisconnected:
+            pass  # pragma: full coverage
+        except BaseException:
+            self.logger.exception("Exception in ASGI application\n")
+            self.send_500_response()
+        else:
+            if not self.handshake_complete:
+                self.logger.error("ASGI callable returned without completing handshake.")
+                self.send_500_response()
+            elif result is not None:
+                self.logger.error("ASGI callable should return None, but returned '%s'.", result)
+        self.transport.close()
+
+    def send_500_response(self) -> None:
+        if self.initial_response or self.handshake_complete:
+            return
+        response = self.conn.reject(500, "Internal Server Error")
+        self.conn.send_response(response)
+        output = self.conn.data_to_send()
+        self.transport.write(b"".join(output))
+
+    async def send(self, message: ASGISendEvent) -> None:
+        await self.writable.wait()
+
+        if not self.handshake_complete and self.initial_response is None:
+            if message["type"] == "websocket.accept":
+                self.logger.info(
+                    '%s - "WebSocket %s" [accepted]',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                )
+                headers = [
+                    (name.decode("latin-1").lower(), value.decode("latin-1"))
+                    for name, value in (self.default_headers + list(message.get("headers", [])))
+                ]
+                accepted_subprotocol = message.get("subprotocol")
+                if accepted_subprotocol:
+                    headers.append(("Sec-WebSocket-Protocol", accepted_subprotocol))
+                self.response.headers.update(headers)
+
+                if not self.transport.is_closing():
+                    self.handshake_complete = True
+                    self.conn.send_response(self.response)
+                    output = self.conn.data_to_send()
+                    self.transport.write(b"".join(output))
+                    self.start_keepalive()
+
+            elif message["type"] == "websocket.close":
+                self.queue.put_nowait({"type": "websocket.disconnect", "code": 1006})
+                self.logger.info(
+                    '%s - "WebSocket %s" 403',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                )
+                response = self.conn.reject(HTTPStatus.FORBIDDEN, "")
+                self.conn.send_response(response)
+                output = self.conn.data_to_send()
+                self.close_sent = True
+                self.handshake_complete = True
+                self.transport.write(b"".join(output))
+                self.transport.close()
+            elif message["type"] == "websocket.http.response.start" and self.initial_response is None:
+                if not (100 <= message["status"] < 600):
+                    raise RuntimeError("Invalid HTTP status code '%d' in response." % message["status"])
+                self.logger.info(
+                    '%s - "WebSocket %s" %d',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                    message["status"],
+                )
+                headers = [
+                    (name.decode("latin-1"), value.decode("latin-1"))
+                    for name, value in list(message.get("headers", []))
+                ]
+                self.initial_response = (message["status"], headers, b"")
+            else:
+                raise RuntimeError(
+                    "Expected ASGI message 'websocket.accept', 'websocket.close' "
+                    f"or 'websocket.http.response.start' but got '{message['type']}'."
+                )
+
+        elif not self.close_sent and self.initial_response is None:
+            try:
+                if message["type"] == "websocket.send":
+                    bytes_data = message.get("bytes")
+                    text_data = message.get("text")
+                    if bytes_data is not None:
+                        self.conn.send_binary(bytes_data)
+                    elif text_data is not None:
+                        self.conn.send_text(text_data.encode())
+                    output = self.conn.data_to_send()
+                    self.transport.write(b"".join(output))
+
+                elif message["type"] == "websocket.close":
+                    if not self.transport.is_closing():
+                        code = message.get("code", 1000)
+                        reason = message.get("reason", "") or ""
+                        self.queue.put_nowait({"type": "websocket.disconnect", "code": code, "reason": reason})
+                        self.conn.send_close(code, reason)
+                        output = self.conn.data_to_send()
+                        self.transport.write(b"".join(output))
+                        self.close_sent = True
+                        self.transport.close()
+                else:
+                    raise RuntimeError(
+                        f"Expected ASGI message 'websocket.send' or 'websocket.close', but got '{message['type']}'."
+                    )
+            except InvalidState:
+                raise ClientDisconnected()
+        elif self.initial_response is not None:
+            if message["type"] == "websocket.http.response.body":
+                body = self.initial_response[2] + message["body"]
+                self.initial_response = self.initial_response[:2] + (body,)
+                if not message.get("more_body", False):
+                    response = self.conn.reject(self.initial_response[0], body.decode())
+                    response.headers.update(self.initial_response[1])
+                    self.queue.put_nowait({"type": "websocket.disconnect", "code": 1006})
+                    self.conn.send_response(response)
+                    output = self.conn.data_to_send()
+                    self.close_sent = True
+                    self.transport.write(b"".join(output))
+                    self.transport.close()
+            else:  # pragma: no cover
+                raise RuntimeError(f"Expected ASGI message 'websocket.http.response.body' but got '{message['type']}'.")
+
+        else:
+            raise RuntimeError(f"Unexpected ASGI message '{message['type']}', after sending 'websocket.close'.")
+
+    async def receive(self) -> ASGIReceiveEvent:
+        message = await self.queue.get()
+        if self.read_paused and self.queue.empty():
+            self.read_paused = False
+            self.transport.resume_reading()
+        return message

venv/Lib/site-packages/uvicorn/protocols/websockets/wsproto_impl.py

@@ -0,0 +1,458 @@
+from __future__ import annotations
+
+import asyncio
+import logging
+import random
+import struct
+from asyncio import TimerHandle
+from io import BytesIO, StringIO
+from typing import Any, Literal, cast
+from urllib.parse import unquote
+
+import wsproto
+from wsproto import ConnectionType, events
+from wsproto.connection import ConnectionState
+from wsproto.extensions import Extension, PerMessageDeflate
+from wsproto.utilities import LocalProtocolError, RemoteProtocolError
+
+from uvicorn._types import ASGI3Application, ASGISendEvent, WebSocketEvent, WebSocketReceiveEvent, WebSocketScope
+from uvicorn.config import Config
+from uvicorn.logging import TRACE_LOG_LEVEL
+from uvicorn.protocols.utils import (
+    ClientDisconnected,
+    get_client_addr,
+    get_local_addr,
+    get_path_with_query_string,
+    get_remote_addr,
+    is_ssl,
+)
+from uvicorn.server import ServerState
+
+
+class FrameTooLargeError(Exception):
+    """Raised when accumulated websocket message bytes exceed `ws_max_size`."""
+
+
+class WebsocketBuffer:
+    def __init__(self, max_length: int) -> None:
+        self.value: BytesIO | StringIO | None = None
+        self.length = 0
+        self.max_length = max_length
+
+    def extend(self, event: events.TextMessage | events.BytesMessage) -> None:
+        if self.value is None:
+            self.value = StringIO() if isinstance(event, events.TextMessage) else BytesIO()
+        self.value.write(event.data)  # type: ignore[arg-type]
+        # `ws_max_size` is a byte budget, so count UTF-8 bytes for text.
+        self.length += len(event.data.encode()) if isinstance(event, events.TextMessage) else len(event.data)
+        if self.length > self.max_length:
+            raise FrameTooLargeError
+
+    def clear(self) -> None:
+        self.value = None
+        self.length = 0
+
+    def to_message(self) -> WebSocketReceiveEvent:
+        if isinstance(self.value, StringIO):
+            return {"type": "websocket.receive", "text": self.value.getvalue()}
+        assert isinstance(self.value, BytesIO)
+        return {"type": "websocket.receive", "bytes": self.value.getvalue()}
+
+
+class WSProtocol(asyncio.Protocol):
+    def __init__(
+        self,
+        config: Config,
+        server_state: ServerState,
+        app_state: dict[str, Any],
+        _loop: asyncio.AbstractEventLoop | None = None,
+    ) -> None:
+        if not config.loaded:
+            config.load()  # pragma: full coverage
+
+        self.config = config
+        self.app = cast(ASGI3Application, config.loaded_app)
+        self.loop = _loop or asyncio.get_event_loop()
+        self.logger = logging.getLogger("uvicorn.error")
+        self.root_path = config.root_path
+        self.app_state = app_state
+
+        # Shared server state
+        self.connections = server_state.connections
+        self.tasks = server_state.tasks
+        self.default_headers = server_state.default_headers
+
+        # Connection state
+        self.transport: asyncio.Transport = None  # type: ignore[assignment]
+        self.server: tuple[str, int | None] | None = None
+        self.client: tuple[str, int] | None = None
+        self.scheme: Literal["wss", "ws"] = None  # type: ignore[assignment]
+
+        # WebSocket state
+        self.queue: asyncio.Queue[WebSocketEvent] = asyncio.Queue()
+        self.handshake_complete = False
+        self.close_sent = False
+
+        # Rejection state
+        self.response_started = False
+
+        self.conn = wsproto.WSConnection(connection_type=ConnectionType.SERVER)
+
+        self.read_paused = False
+        self.writable = asyncio.Event()
+        self.writable.set()
+
+        # Keepalive state
+        self.ping_interval = config.ws_ping_interval
+        self.ping_timeout = config.ws_ping_timeout
+        self.ping_timer: TimerHandle | None = None
+        self.pong_timer: TimerHandle | None = None
+        self.pending_ping_payload: bytes | None = None
+        self.ping_sent_at: float = 0.0
+        self.last_ping_rtt: float = 0.0
+
+        # Buffer
+        self.buffer = WebsocketBuffer(self.config.ws_max_size)
+
+    # Protocol interface
+
+    def connection_made(self, transport: asyncio.Transport) -> None:  # type: ignore[override]
+        self.connections.add(self)
+        self.transport = transport
+        self.server = get_local_addr(transport)
+        self.client = get_remote_addr(transport)
+        self.scheme = "wss" if is_ssl(transport) else "ws"
+
+        if self.logger.level <= TRACE_LOG_LEVEL:
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket connection made", prefix)
+
+    def connection_lost(self, exc: Exception | None) -> None:
+        self.stop_keepalive()
+        code = 1005 if self.handshake_complete else 1006
+        self.queue.put_nowait({"type": "websocket.disconnect", "code": code})
+        self.connections.remove(self)
+
+        if self.logger.level <= TRACE_LOG_LEVEL:
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket connection lost", prefix)
+
+        self.handshake_complete = True
+        if exc is None:
+            self.transport.close()
+
+    def eof_received(self) -> None:
+        pass
+
+    def data_received(self, data: bytes) -> None:
+        try:
+            self.conn.receive_data(data)
+        except RemoteProtocolError as err:
+            # TODO: Remove `type: ignore` when wsproto fixes the type annotation.
+            self.transport.write(self.conn.send(err.event_hint))  # type: ignore[arg-type]  # noqa: E501
+            self.transport.close()
+        else:
+            self.handle_events()
+
+    def handle_events(self) -> None:
+        for event in self.conn.events():
+            if self.close_sent:
+                return
+            if isinstance(event, events.Request):
+                self.handle_connect(event)
+            elif isinstance(event, (events.TextMessage, events.BytesMessage)):
+                self.handle_message(event)
+            elif isinstance(event, events.CloseConnection):
+                self.handle_close(event)
+            elif isinstance(event, events.Ping):
+                self.handle_ping(event)
+            elif isinstance(event, events.Pong):
+                self.handle_pong(event)
+
+    def pause_writing(self) -> None:
+        """
+        Called by the transport when the write buffer exceeds the high water mark.
+        """
+        self.writable.clear()  # pragma: full coverage
+
+    def resume_writing(self) -> None:
+        """
+        Called by the transport when the write buffer drops below the low water mark.
+        """
+        self.writable.set()  # pragma: full coverage
+
+    def shutdown(self) -> None:
+        self.stop_keepalive()
+        if self.handshake_complete:
+            self.queue.put_nowait({"type": "websocket.disconnect", "code": 1012})
+            output = self.conn.send(wsproto.events.CloseConnection(code=1012))
+            self.transport.write(output)
+        else:
+            self.send_500_response()
+        self.transport.close()
+
+    def on_task_complete(self, task: asyncio.Task[None]) -> None:
+        self.tasks.discard(task)
+
+    # Event handlers
+
+    def handle_connect(self, event: events.Request) -> None:
+        headers = [(b"host", event.host.encode())]
+        headers += [(key.lower(), value) for key, value in event.extra_headers]
+        raw_path, _, query_string = event.target.partition("?")
+        path = unquote(raw_path)
+        full_path = self.root_path + path
+        full_raw_path = self.root_path.encode("ascii") + raw_path.encode("ascii")
+        self.scope: WebSocketScope = {
+            "type": "websocket",
+            "asgi": {"version": self.config.asgi_version, "spec_version": "2.4"},
+            "http_version": "1.1",
+            "scheme": self.scheme,
+            "server": self.server,
+            "client": self.client,
+            "root_path": self.root_path,
+            "path": full_path,
+            "raw_path": full_raw_path,
+            "query_string": query_string.encode("ascii"),
+            "headers": headers,
+            "subprotocols": event.subprotocols,
+            "state": self.app_state.copy(),
+            "extensions": {"websocket.http.response": {}},
+        }
+        self.queue.put_nowait({"type": "websocket.connect"})
+        task = self.loop.create_task(self.run_asgi())
+        task.add_done_callback(self.on_task_complete)
+        self.tasks.add(task)
+
+    def handle_message(self, event: events.TextMessage | events.BytesMessage) -> None:
+        try:
+            self.buffer.extend(event)
+        except FrameTooLargeError:
+            self.close_sent = True
+            reason = f"Message exceeds the maximum size ({self.config.ws_max_size} bytes)"
+            self.queue.put_nowait({"type": "websocket.disconnect", "code": 1009, "reason": reason})
+            if not self.transport.is_closing():
+                self.transport.write(self.conn.send(wsproto.events.CloseConnection(code=1009, reason=reason)))
+                self.transport.close()
+            return
+        if event.message_finished:
+            self.queue.put_nowait(self.buffer.to_message())
+            self.buffer.clear()
+            if not self.read_paused:
+                self.read_paused = True
+                self.transport.pause_reading()
+
+    def handle_close(self, event: events.CloseConnection) -> None:
+        if self.conn.state == ConnectionState.REMOTE_CLOSING:
+            self.transport.write(self.conn.send(event.response()))
+        self.queue.put_nowait({"type": "websocket.disconnect", "code": event.code, "reason": event.reason})
+        self.transport.close()
+
+    def handle_ping(self, event: events.Ping) -> None:
+        self.transport.write(self.conn.send(event.response()))
+
+    def handle_pong(self, event: events.Pong) -> None:
+        # Ignore unsolicited pongs and stale pongs whose payload doesn't match the ping currently in flight.
+        if self.pending_ping_payload is None or bytes(event.payload) != self.pending_ping_payload:
+            return  # pragma: no cover
+
+        self.last_ping_rtt = self.loop.time() - self.ping_sent_at
+        self.pending_ping_payload = None
+        # The peer answered in time; cancel the pong deadline and chain the next ping. This `schedule_ping()` call is
+        # what keeps the keepalive loop running when ping_timeout is set. When ping_timeout is None the next ping is
+        # already scheduled by `send_keepalive_ping`, so we must not schedule a duplicate here.
+        if self.pong_timer is not None:
+            self.pong_timer.cancel()
+            self.pong_timer = None
+            self.schedule_ping()
+
+    def start_keepalive(self) -> None:
+        if self.ping_interval is not None and self.ping_interval > 0:
+            self.schedule_ping()
+
+    def stop_keepalive(self) -> None:
+        if self.ping_timer is not None:
+            self.ping_timer.cancel()
+            self.ping_timer = None
+        if self.pong_timer is not None:  # pragma: no cover
+            self.pong_timer.cancel()
+            self.pong_timer = None
+        self.pending_ping_payload = None
+
+    def schedule_ping(self) -> None:
+        assert self.ping_interval is not None
+        delay = max(0.0, self.ping_interval - self.last_ping_rtt)
+        self.ping_timer = self.loop.call_later(delay, self.send_keepalive_ping)
+
+    def send_keepalive_ping(self) -> None:
+        self.ping_timer = None
+        if self.close_sent or self.transport.is_closing():  # pragma: no cover
+            return
+        # Random 4-byte payload identifies this ping; `handle_pong` uses it to ignore stale or unsolicited pongs.
+        self.pending_ping_payload = struct.pack("!I", random.getrandbits(32))
+        self.ping_sent_at = self.loop.time()
+        self.transport.write(self.conn.send(wsproto.events.Ping(payload=self.pending_ping_payload)))
+        if self.ping_timeout is not None:
+            self.pong_timer = self.loop.call_later(self.ping_timeout, self.keepalive_timeout)
+        else:  # pragma: no cover
+            self.schedule_ping()
+
+    def keepalive_timeout(self) -> None:
+        self.pong_timer = None
+        self.pending_ping_payload = None
+        if self.close_sent or self.transport.is_closing():  # pragma: no cover
+            return
+        if self.logger.level <= TRACE_LOG_LEVEL:
+            prefix = "%s:%d - " % self.client if self.client else ""
+            self.logger.log(TRACE_LOG_LEVEL, "%sWebSocket keepalive ping timeout", prefix)
+        reason = "keepalive ping timeout"
+        self.transport.write(self.conn.send(wsproto.events.CloseConnection(code=1011, reason=reason)))
+        self.close_sent = True
+        self.transport.close()
+
+    def send_500_response(self) -> None:
+        if self.response_started or self.handshake_complete:
+            return  # we cannot send responses anymore
+        headers: list[tuple[bytes, bytes]] = [
+            (b"content-type", b"text/plain; charset=utf-8"),
+            (b"connection", b"close"),
+            (b"content-length", b"21"),
+        ]
+        output = self.conn.send(wsproto.events.RejectConnection(status_code=500, headers=headers, has_body=True))
+        output += self.conn.send(wsproto.events.RejectData(data=b"Internal Server Error"))
+        self.transport.write(output)
+
+    async def run_asgi(self) -> None:
+        try:
+            result = await self.app(self.scope, self.receive, self.send)  # type: ignore[func-returns-value]
+        except ClientDisconnected:
+            pass  # pragma: full coverage
+        except BaseException:
+            self.logger.exception("Exception in ASGI application\n")
+            self.send_500_response()
+        else:
+            if not self.handshake_complete:
+                self.logger.error("ASGI callable returned without completing handshake.")
+                self.send_500_response()
+            elif result is not None:
+                self.logger.error("ASGI callable should return None, but returned '%s'.", result)
+        self.transport.close()
+
+    async def send(self, message: ASGISendEvent) -> None:
+        await self.writable.wait()
+
+        if not self.handshake_complete:
+            if message["type"] == "websocket.accept":
+                self.logger.info(
+                    '%s - "WebSocket %s" [accepted]',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                )
+                subprotocol = message.get("subprotocol")
+                extra_headers = self.default_headers + list(message.get("headers", []))
+                extensions: list[Extension] = []
+                if self.config.ws_per_message_deflate:
+                    extensions.append(PerMessageDeflate())
+                if not self.transport.is_closing():
+                    self.handshake_complete = True
+                    output = self.conn.send(
+                        wsproto.events.AcceptConnection(
+                            subprotocol=subprotocol,
+                            extensions=extensions,
+                            extra_headers=extra_headers,
+                        )
+                    )
+                    self.transport.write(output)
+                    self.start_keepalive()
+
+            elif message["type"] == "websocket.close":
+                self.queue.put_nowait({"type": "websocket.disconnect", "code": 1006})
+                self.logger.info(
+                    '%s - "WebSocket %s" 403',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                )
+                self.handshake_complete = True
+                self.close_sent = True
+                event = events.RejectConnection(status_code=403, headers=[])
+                output = self.conn.send(event)
+                self.transport.write(output)
+                self.transport.close()
+
+            elif message["type"] == "websocket.http.response.start":
+                # ensure status code is in the valid range
+                if not (100 <= message["status"] < 600):
+                    msg = "Invalid HTTP status code '%d' in response."
+                    raise RuntimeError(msg % message["status"])
+                self.logger.info(
+                    '%s - "WebSocket %s" %d',
+                    get_client_addr(self.scope),
+                    get_path_with_query_string(self.scope),
+                    message["status"],
+                )
+                self.handshake_complete = True
+                event = events.RejectConnection(
+                    status_code=message["status"],
+                    headers=list(message["headers"]),
+                    has_body=True,
+                )
+                output = self.conn.send(event)
+                self.transport.write(output)
+                self.response_started = True
+
+            else:
+                raise RuntimeError(
+                    "Expected ASGI message 'websocket.accept', 'websocket.close' "
+                    f"or 'websocket.http.response.start' but got '{message['type']}'."
+                )
+
+        elif not self.close_sent and not self.response_started:
+            try:
+                if message["type"] == "websocket.send":
+                    bytes_data = message.get("bytes")
+                    text_data = message.get("text")
+                    data = text_data if bytes_data is None else bytes_data
+                    output = self.conn.send(wsproto.events.Message(data=data))  # type: ignore
+                    if not self.transport.is_closing():
+                        self.transport.write(output)
+
+                elif message["type"] == "websocket.close":
+                    self.close_sent = True
+                    code = message.get("code", 1000)
+                    reason = message.get("reason", "") or ""
+                    self.queue.put_nowait({"type": "websocket.disconnect", "code": code, "reason": reason})
+                    output = self.conn.send(wsproto.events.CloseConnection(code=code, reason=reason))
+                    if not self.transport.is_closing():
+                        self.transport.write(output)
+                        self.transport.close()
+
+                else:
+                    raise RuntimeError(
+                        f"Expected ASGI message 'websocket.send' or 'websocket.close', but got '{message['type']}'."
+                    )
+            except LocalProtocolError as exc:
+                raise ClientDisconnected from exc
+        elif self.response_started:
+            if message["type"] == "websocket.http.response.body":
+                body_finished = not message.get("more_body", False)
+                reject_data = events.RejectData(data=message["body"], body_finished=body_finished)
+                output = self.conn.send(reject_data)
+                self.transport.write(output)
+
+                if body_finished:
+                    self.queue.put_nowait({"type": "websocket.disconnect", "code": 1006})
+                    self.close_sent = True
+                    self.transport.close()
+
+            else:
+                raise RuntimeError(f"Expected ASGI message 'websocket.http.response.body' but got '{message['type']}'.")
+
+        else:
+            raise RuntimeError(f"Unexpected ASGI message '{message['type']}', after sending 'websocket.close'.")
+
+    async def receive(self) -> WebSocketEvent:
+        message = await self.queue.get()
+        if self.read_paused and self.queue.empty():
+            self.read_paused = False
+            self.transport.resume_reading()
+        return message