Public bug reported:
I'm stuck behind a proxy that seems to filter the if-range header from
requests from apt-cacher-ng.
This means that when apt-cacher-ng tries to refresh a volatile file by
passing "If-Range: <last known modification time" and "Range:
bytes=<last byte of the file>", all the remote server ever sees is the
request for the last byte. apt-cacher-ng gets a HTTP 206 response back
and concludes that the file hasn't changed.
This causes lots of grief because the Release file isn't updated, so the
trust path from Release.gpg -> Release -> Packages.bz2 -> checksums of
packages is busted.
I see this comment in apt-0.8.16~exp12ubuntu8/apt-pkg/acquire-item.cc:
// File was already in place. It needs to be re-downloaded/verified
// because Release might have changed, we do give it a differnt
// name than DestFile because otherwise the http method will
// send If-Range requests and there are too many broken servers
// out there that do not understand them
..suggesting that I'm far from alone with this problem.
** Affects: apt-cacher-ng (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/983128
Title:
Please provide a way to prevent If-Range header use
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