Fixes an intermittent UnboundLocalError that could occur in send_request()
when anyio's fail_after context manager incorrectly suppresses exceptions
due to a race condition (anyio#589).
Changes:
- Initialize response_or_error to None before the try block
- Add _process_response static method with defensive None check
- Handle EndOfStream and ClosedResourceError exceptions explicitly
- Use try/except/else structure for cleaner control flow
- Add unit tests for _process_response
Closes#1717
Max Isbey
ee2a010de7