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Fix/h2 connection reset #5

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Oct 7, 2024
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9 changes: 9 additions & 0 deletions httpcore/_async/http2.py
Original file line number Diff line number Diff line change
Expand Up @@ -401,6 +401,9 @@ async def _receive_remote_settings_change(self, event: h2.events.Event) -> None:
await self._max_streams_semaphore.acquire()
self._max_streams -= 1

async def _reset_steam(self, stream_id: int, error_code: int) -> None:
self._h2_state.reset_stream(stream_id=stream_id, error_code=error_code)

async def _response_closed(self, stream_id: int) -> None:
await self._max_streams_semaphore.release()
del self._events[stream_id]
Expand Down Expand Up @@ -578,6 +581,12 @@ async def __aiter__(self) -> typing.AsyncIterator[bytes]:
# we want to close the response (and possibly the connection)
# before raising that exception.
with AsyncShieldCancellation():
# need send cancel frame when the exception is not from remote peer.
if not isinstance(exc, RemoteProtocolError):
await self._connection._reset_steam(
stream_id=self._stream_id,
error_code=h2.settings.ErrorCodes.CANCEL,
)
await self.aclose()
raise exc

Expand Down
9 changes: 9 additions & 0 deletions httpcore/_sync/http2.py
Original file line number Diff line number Diff line change
Expand Up @@ -401,6 +401,9 @@ def _receive_remote_settings_change(self, event: h2.events.Event) -> None:
self._max_streams_semaphore.acquire()
self._max_streams -= 1

def _reset_steam(self, stream_id: int, error_code: int) -> None:
self._h2_state.reset_stream(stream_id=stream_id, error_code=error_code)

def _response_closed(self, stream_id: int) -> None:
self._max_streams_semaphore.release()
del self._events[stream_id]
Expand Down Expand Up @@ -578,6 +581,12 @@ def __iter__(self) -> typing.Iterator[bytes]:
# we want to close the response (and possibly the connection)
# before raising that exception.
with ShieldCancellation():
# need send cancel frame when the exception is not from remote peer.
if not isinstance(exc, RemoteProtocolError):
self._connection._reset_steam(
stream_id=self._stream_id,
error_code=h2.settings.ErrorCodes.CANCEL,
)
self.close()
raise exc

Expand Down