I share RDM's sentiment and I'm not keen to add more complexity.

The http.server module in Python's stdlib is a useful example implementation of a simple HTTP server. I'd rather keep it simple and see a full featured HTTP server on PyPI. These days we don't have to include all batteries in Python's standard library. PyPI and pip made it super easy to install additional packages.

I might be convinced to add transparent gzip compression if it is done properly. A temporary file, compress-than-send, and whole content handling (content-length) are all wrong. Your current implementation will result in at least one CVE and a bunch of mails to Python security mailing list. Transparent compression must use chunked encoding with a small in-memory buffer instead of a file and zlib.compressobj() instead of gzip.GzipFile.