The [http] package also can do secure HTTP (HTTPS) with the help of [tls] package, as
[Michael A. Cleverly]'s example from the http manual illustrates:
    package require http
    package require tls
    http::register https 443 ::tls::socket
    set token [http::geturl https://my.secure.site/]

Also see [Matt Newman]'s example [http://www.sensus.org/tcl/tls.htm#HTTPS%20EXAMPLE].
[[Someone help fix up that URL?]]






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[[But none of this stuff knows how to tunnel proxies, as of December 2001.]]
[[But maybe [TclCurl] helps?]]