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