Receive ASGI websocket messages, ensuring valid state transitions.
(self)
| 39 | self.application_state = WebSocketState.CONNECTING |
| 40 | |
| 41 | async def receive(self) -> Message: |
| 42 | """ |
| 43 | Receive ASGI websocket messages, ensuring valid state transitions. |
| 44 | """ |
| 45 | if self.client_state == WebSocketState.CONNECTING: |
| 46 | message = await self._receive() |
| 47 | message_type = message["type"] |
| 48 | if message_type != "websocket.connect": |
| 49 | raise RuntimeError(f'Expected ASGI message "websocket.connect", but got {message_type!r}') |
| 50 | self.client_state = WebSocketState.CONNECTED |
| 51 | return message |
| 52 | elif self.client_state == WebSocketState.CONNECTED: |
| 53 | message = await self._receive() |
| 54 | message_type = message["type"] |
| 55 | if message_type not in {"websocket.receive", "websocket.disconnect"}: |
| 56 | raise RuntimeError( |
| 57 | f'Expected ASGI message "websocket.receive" or "websocket.disconnect", but got {message_type!r}' |
| 58 | ) |
| 59 | if message_type == "websocket.disconnect": |
| 60 | self.client_state = WebSocketState.DISCONNECTED |
| 61 | return message |
| 62 | else: |
| 63 | raise WebSocketDisconnected('Cannot call "receive" once a disconnect message has been received.') |
| 64 | |
| 65 | async def send(self, message: Message) -> None: |
| 66 | """ |