BaseHTTPRequestHandler.send_response

http.server

method of BaseHTTPRequestHandler (source) not WASI

BaseHTTPRequestHandler.send_response(code, message=None)

Add the response header to the headers buffer and log the
response code.

Also send two standard headers with the server software
version and the current date.

© Python Software Foundation. PSF License Version 2 · Official docs ↗

Changed in 3.3

3.3: Headers are stored to an internal buffer and end_headers() needs to be called explicitly.