Read exactly n bytes from internal buffer. Waits for data via the callback-fed buffer instead of StreamReader.
(self, n)
| 342 | return (opcode, payload) |
| 343 | |
| 344 | async def _read_exact(self, n): |
| 345 | """Read exactly n bytes from internal buffer. |
| 346 | |
| 347 | Waits for data via the callback-fed buffer instead of StreamReader. |
| 348 | """ |
| 349 | while len(self._buffer) < n: |
| 350 | if self._eof: |
| 351 | return None |
| 352 | self._data_event.clear() |
| 353 | # Critical: check buffer AGAIN after clearing to avoid race |
| 354 | # condition where data arrives between clear() and wait() |
| 355 | if len(self._buffer) >= n: |
| 356 | break |
| 357 | await self._data_event.wait() |
| 358 | if self._eof and len(self._buffer) < n: |
| 359 | return None |
| 360 | |
| 361 | data = bytes(self._buffer[:n]) |
| 362 | del self._buffer[:n] |
| 363 | return data |
| 364 | |
| 365 | def _unmask(self, payload, masking_key): |
| 366 | """Unmask WebSocket payload data.""" |
no test coverage detected