HTTPConnection.endheaders

http.client

method of HTTPConnection (source) not WASI

HTTPConnection.endheaders(message_body=None, *, encode_chunked=False)

Indicate that the last header line has been sent to the server.

This method sends the request to the server.  The optional message_body
argument can be used to pass a message body associated with the
request.

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

Changed in 3.6

3.6: Added chunked encoding support and the encode_chunked parameter.