http and httpsThe http scheme refers to the Hypertext Transfer Protocol. The
url library supports HTTP version 1.1, specified in RFC 2616.
Its default port is 80.
The https scheme is a secure version of http, with
transmission via SSL. It is defined in RFC 2069, and its default port
is 443. When using https, the url library performs SSL
encryption via the ssl library, by forcing the ssl
gateway method to be used. See Gateways in General.
If this option is non-nil (the default), the url library
honors the HTTP ‘Refresh’ header, which is used by servers to
direct clients to reload documents from the same URL or a different
one. If the value is nil, the ‘Refresh’ header is
ignored; any other value means to ask the user on each request.