httptunnel v1.97 can create a two-way data path through an HTTP proxy, from your isolated computer forced to use an HTTP proxy, to a system on the Internet you have access to.
Changes: This version has a major incompatibility change in the protocol and is generally more robust. This is a beta release in anticipation of 2.0. Changes: Improved poll() emulation and HTTP parsing. hts --content-length works now. Experimental setsockopt() settings to make connections more reliable.