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We do not deal a lot with URIs which need encoding, but then we do it is
a pain that we store it decoded in the acquire system as it means we
have to decode and reencode URIs eventually which is potentially giving
us slightly different URIs.
We see that in our own testing framework while setting up redirects as
the config options are effectively double-encoded and decoded to pass
them around successfully as otherwise %2f and / in an URI are treated
the same.
This commit adds the infrastructure for methods to opt into getting URIs
send in encoded form (and returning them to us in encoded form, too) so
that we eventually do not have to touch the URIs which is how it should
be. This means though that we have to deal with methods who do not
support this yet (aka: all at the moment) for which we decode and encode
while communicating with them.
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This gets rid of byte-range requests and 416 responses.
Gbp-Dch: ignore
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This should make the test less flaky and hopefully fix the failure
on Ubuntu's armhf CI nodes.
Gbp-Dch: ignore
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This doesn't allow all tests to run cleanly, but it at least allows to
write tests which could run successfully in such environments.
Git-Dch: Ignore
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This allows running tests in parallel.
Git-Dch: Ignore
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Not all tests work yet, most notable the cdrom tests, but those require
changes in libapt itself to have a proper fix and what we have fixed so
far is good enough progress for now.
Git-Dch: Ignore
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We had a very similar method previously for our own private usage, but
with some generalisation we can move this check into the acquire system
proper so that all frontends profit from this compatibility change.
As we are disabling a security feature here a warning is issued and
frontends are advised to consider reworking their download logic if
possible.
Note that this is implemented as an all or nothing situation: We can't
just (not) drop privileges for a subset of the files in a fetcher, so in
case you have to download some files with and some without you need to
use two fetchers.
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It shouldn't be too common, but sometimes people have multiple mirrors
in the sources or otherwise repositories with the same content. Now that
we gracefully can handle multiple requests to the same URI, we can also
fold multiple requests with the same expected hashes into one. Note that
this isn't trying to find oppertunities for merging, but just merges if
it happens to encounter the oppertunity for it.
This is most obvious in the new testcase actually as it needs to delay
the action to give the acquire system enough time to figure out that
they can be merged.
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This is an unlikely event for indexes and co, but it can happen quiet
easily e.g. for changelogs where you want to get the changelogs for
multiple binary package(version)s which happen to all be built from a
single source.
The interesting part is that the Acquire system actually detected this
already and set the item requesting the URI again to StatDone - expect
that this is hardly sufficient: an Item must be Complete=true as well
to be considered truely done and that is only the tip of the ::Done
handling iceberg. So instead of this StatDone hack we allow QItems to be
owned by multiple items and notify all owners about everything now,
so that for the point of each item they got it downloaded just for them.
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