It's exactly what ArchView Firefox addon was doing (preview of RAR, ZIP and ISO files with selective downloading feature) in 2008 : http://archview.sourceforge.net/ - the only documentation left (after Mozilla anihilated traces of old extensions - what I don't know how to question, part of me is gone too) is the source code (clean and minimal javascript). Nice to have some reading for it.
It's exactly what ArchView Firefox addon was doing (preview of RAR, ZIP and ISO files with selective downloading feature) in 2008 : http://archview.sourceforge.net/ - the only documentation left (after Mozilla anihilated traces of old extensions - what I don't know how to question, part of me is gone too) is the source code (clean and minimal javascript). Nice to have some reading for it.