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From:	Aleksey Midenkov <midenok AT gmail DOT com>
Date:	Tue, 27 Oct 2015 10:34:10 +0300
Message-ID:	<CAF8BazDLiRjrshKN4PxK6PcAz+3Z_i-wNxAgDra=CDdrABunbw@mail.gmail.com>
Subject:	Re: Why package cache is not used during setup download?
To:	cygwin AT cygwin DOT com

On Mon, Oct 26, 2015 at 2:48 PM, Andrey Repin <anrdaemon AT yandex DOT ru> wrote:
> Greetings, Aleksey Midenkov!
>
>>>> Cygwin setup process my turn to endless retry-error on bad internet
>>>> channels, because:
>>>
>>>> 1. setup doesn't know how to retry download (why it fails to download anyway?);
>>>
>>> Because your internet is bad?
>
>> On the second thought I believe that the problem is with setup.exe
>> itself. Because:
>
>> a) I tried different mirrors. It always fails in somewhere between
>> 80-90% (of total progress).
>> b) I never noticed any problems with downloading files except with
>> Cygwin. Gigabyte-sized files via http are downloading without fail.
>
> If you get consistent results from different mirrors (and since you're the
> only person reporting it), my second thought is that it is a local issue.
> Overly zealous antivirus/firewall coming to mind.

I remember this was also happening long time ago (about 10 years or
more) in completely different environment of course. Anyway, local
problem with *Cygwin-only* means problem with Cygwin. I rarely use
Cygwin and when I use it, I always stumble upon this. Maybe there is
another reason of why you don't know of other complaints.

>
>>>> 2. setup doesn't use cache of previously downloaded files and always
>>>> redownload all packages from the beginning.
>>>
>>> It do use cache, if checksum is correct.
>
>> Hmmm, on setup.ini doc says:
>
>> install: filename size-in-bytes MD5 sum
>
> As David pointed out already, MD5 hash proven weak and is no longer used in
> sensitive environments.

I don't need to know who the David is and what he pointed out. But
what does this mean in core, the documentation is wrong and checksum
is done with different algorithm?

>
>
> --
> With best regards,
> Andrey Repin
> Monday, October 26, 2015 14:45:39
>
> Sorry for my terrible english...
>

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