Reject NUL bytes in HTTP request lines

[andrewkernel]

Summary

• reject request lines containing NUL bytes with a 400 Bad Request response
• add a regression test covering a request line with an embedded NUL byte

Testing

• python -m pytest --no-cov -n 0 cheroot/test/test_core.py -k null_byte_in_request_line

Note: the targeted test passed in the workspace, but pytest emitted a cache-permission warning in this sandbox after completion.

[read-the-docs-community]

Documentation build overview

📚 cheroot | 🛠️ Build #33334420 | 📁 Comparing 0f32bcb against latest (3937fe1)

  🔍 Preview build  

6 files changed · ± 6 modified

± Modified

• genindex/index.html
• history/index.html
• pkg/cheroot/index.html
• pkg/cheroot.server/index.html
• pkg/cheroot.test/index.html
• pkg/cheroot.test.test_core/index.html

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.05%. Comparing base (3937fe1) to head (0f32bcb).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #832      +/-   ##
==========================================
- Coverage   78.15%   78.05%   -0.10%     
==========================================
  Files          41       41              
  Lines        4788     4799      +11     
  Branches      547      548       +1     
==========================================
+ Hits         3742     3746       +4     
- Misses        906      912       +6     
- Partials      140      141       +1