Allows users who know what they are getting themselves into with this
trick to e.g. disable privilege dropping for e.g. file:// until they can
fix up the permissions on those repositories. It helps also the test
framework and people with a similar setup (= me) to run in less modified
environments.
C++11 adds the 'override' specifier to mark that a method is overriding
a base class method and error out if not. We hide it in the APT_OVERRIDE
macro to ensure that we keep compiling in pre-c++11 standards.
Reported-By: clang-modernize -add-override -override-macros
Git-Dch: Ignore
If we have the expected hashes we can check with them if the file we
have in partial we got a 416 for is the expected file. We detected this
with same-size before, but not every server sends a good Content-Range
header with a 416 response.
We do this in HTTP already to give the CPU some exercise while the disk
is heavily spinning (or flashing?) to store the data avoiding the need
to reread the entire file again later on to calculate the hashes – which
happens outside of the eyes of progress reporting, so you might ended up
with a bunch of https workers 'stuck' at 100% while they were busy
calculating hashes.
This is a bummer for everyone using apt as a connection speedtest as the
https method works slower now (not really, it just isn't reporting done
too early anymore).
Methods get told which hashes are expected by the acquire system, which
means we can use this list to restrict what we calculate in the methods
as any extra we are calculating is wasted effort as we can't compare it
with anything anyway.
Adding support for a new hash algorithm is therefore 'free' now and if a
algorithm is no longer provided in a repository for a file, we
automatically stop calculating it.
In practice this results in a speed-up in Debian as we don't have SHA512
here (so far), so we practically stop calculating it.
The worker expects that the methods tell him when they start or finish
downloading a file. Various information pieces are passed along in this
report including the (expected) filesize. https was using a "global"
struct for reporting which made it 'reuse' incorrect values in some
cases like a non-existent InRelease fallbacking to Release{,.gpg}
resulting in a size-mismatch warning. Reducing the scope and redesigning
the setting of the values we can fix this and related issues.
Closes: 777565, 781509
Thanks: Robert Edmonds and Anders Kaseorg for initial patchs
Bug #778375 uncovered that https wasn't properly integrated in the class
family tree of http as it was supposed to be leading to a NULL pointer
dereference. Fixing this 'properly' was deemed to much diff for
practically no gain that late in the release, so commit
0c2dc43d4f just fixed the synptom, while
this commit here is fixing the cause plus adding a test.
Add a explicit ReceivedData to HttpsMethod that indicates when
we got data from the connection so that we can send URISTart()
to the parent.
This is needed because URIStart got moved in f9b4f12d from
the progress_callback to write_data() and it only checks for
Res.Size. In the old code if progress_callback is called by
libcurl (and sets Res.Size) before write_data is called then
URIStart() is never send. Making this a explicit ReceivedData
variable fixes this issue.
Do not drop privileges in the methods when using a older version of
libapt that does not support the chown magic in partial/ yet. To
do this DropPrivileges() now will ignore a empty Apt::Sandbox::User.
Cleanup all hardcoded _apt along the way.
Beside being a bit cleaner it hopefully also resolves oddball problems
I have with high levels of parallel jobs.
Git-Dch: Ignore
Reported-By: iwyu (include-what-you-use)
Servers might respond with a complete file either because they don't
support Ranges at all or the If-Range condition isn't statisfied, so we
have to parse the headers curl gets ourself to seek or truncate the file
we have so far.
This also finially adds the testcase testing a bunch of partial
situations for both, http and https - which is now all green.
Closes: 617643, 667699
LP: 1157943
David Kalnischkies
Michael Vogt
Michael Vogt
David Kalnischkies
Michael Vogt