Jens-G opened a new pull request, #3864: URL: https://github.com/apache/thrift/pull/3864
JIRA: [THRIFT-6266](https://issues.apache.org/jira/browse/THRIFT-6266) Client: py `THttpServer` converted `Content-Length` with a bare `int()`. The field's grammar is `1*DIGIT` (RFC 9110 §8.6), but `int()` also accepts: - a leading sign (`+17`); - underscores between digits (`1_7`); - whitespace of kinds a header value can carry around the number: no-break space `\xa0`, vertical tab, form feed, NEL. `http.server` decodes headers as Latin-1, so all of these reach the handler. Each of these was taken as a length of 17 and the request was served. `-0` passed as zero, and the request then failed without a response. ### Change The value is stripped of spaces and tabs, which surround a field value without being part of it (RFC 9110 §5.5). What remains has to match `[0-9]+`; anything else gets the existing `400 Invalid Content-Length`. The `ValueError` handler stays: from Python 3.11 on, `int()` refuses more than 4300 digits. A note on the ticket's examples: `" 12 "` is still accepted, because the whitespace around a field value is not part of the value. `http.server` already drops the leading part. The D binding does the same since `2f7714ebf`. A list form such as `17, 17` is refused, which RFC 9110 permits. ### Tests New `lib/py/test/test_http_server_content_length.py`, registered in both lists in `lib/py/Makefile.am`. It sends raw requests to a running `THttpServer` and checks the status and whether the processor ran. - **Served:** `17`, `017`, and `17` with spaces or tabs on either side. - **Refused with 400:** a sign; underscores; `\xa0`, `\x0b`, `\x0c` or `\x85` before or after the digits; an empty value, `0x11`, `1e1`, `17.0`, `1 7`, `-0`; a list of lengths. - **Refused with 400 or 413:** a 5000-digit length (the status depends on the Python version). Results: - Against the unmodified server, the sign, underscore, whitespace and `-0` cases fail. - Three mutations each fail one case: - stripping all whitespace instead of spaces and tabs; - not stripping at all; - dropping the `ValueError` handler (on Python 3.12). - The new tests and the existing `test_http_server_body_size.py` pass on Python 3.10, 3.12 and 3.14. - flake8 is clean. 🤖 Generated with [Claude Code](https://claude.com/claude-code) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
