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cache files without extension

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far lock (flock)

unread,
Nov 12, 2007, 6:51:10 AM11/12/07
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hello

I'm experincing this problem: in all the 9.50 alphas I've tested so far, in
the cache directory (C:\Program Files\Opera\profile\cache4 in my case, being
a single user setup) I can't see the extensions anymore

in opera:config I found nothing about; can the old behavioiur (with
extensions) turned on?

thank you!

--
flock
Oper 9.5 b9649 on Windows XP PRO SP2


Eik

unread,
Nov 12, 2007, 7:26:03 AM11/12/07
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On Mon, 12 Nov 2007 11:51:10 -0000, far lock (flock) <floc...@yahoo.it>
wrote:

> in the cache directory I can't see the extensions anymore

This is a deliberate change designed to improve safety/security,
apparently.

http://www.opera.com/docs/changelogs/windows/950b1/

The theory is that not using file extensions means that users (typically
Windows users using Explorer) can't easily click on files in the cache
directory and run them, while virus scanners won't sometimes report false
problems with the files Opera downloads.

The down side is of course that a user who can be trusted to browse the
cache directory without running a potentially harmful file Opera has
downloaded from a dodgy website will now find it harder to identify the
files they're looking for. There's no way of changing this new behaviour,
it is hard-coded into Opera 9.5.

far lock (flock)

unread,
Nov 12, 2007, 7:39:39 AM11/12/07
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E> The theory is that not using file extensions means that users (typically
E> Windows users using Explorer) can't easily click on files in the cache
E> directory and run them, while virus scanners won't sometimes report
E> false problems with the files Opera downloads.

thank you for the prompt and exhaustive reply :)

I switch this post in a suggestion: add a sort of extension at the beginning
or at the end of the (extension-less) filenames

e.g.: let's suppose opr01HBD is a gif image -> gif-opr01HBD or opr01HBD-gif
(or something similar)

--
bye, flock
Opera 9.5 b9649 on Windows XP PRO SP2


Andrew Gregory

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Nov 12, 2007, 8:13:28 AM11/12/07
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On Mon, 12 Nov 2007 21:39:39 +0900, far lock (flock) <floc...@yahoo.it>
wrote:

> I switch this post in a suggestion: add a sort of extension at the

> beginning or at the end of the (extension-less) filenames

Is Tools>Advanced>Cache useful? i.e. you can identify which cache file
corresponds to the web file you're interested in.

HTH,
--
Andrew Gregory
<URL: http://www.scss.com.au/family/andrew/ >

flocksoft

unread,
Nov 12, 2007, 8:21:21 AM11/12/07
to
AG> Is Tools>Advanced>Cache useful? i.e. you can identify which cache file
AG> corresponds to the web file you're interested in.

hello, thank you for the suggestion

for a single file this is good, but it's unpratical with a lot of files;
with my previous suggestion using some file managers or some scripts, all
the files could be renamed in only one step

--

Matthew Winn

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Nov 13, 2007, 9:39:26 AM11/13/07
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On Mon, 12 Nov 2007 22:13:28 +0900, Andrew Gregory <and...@no.spam.scss.com.au.invalid> wrote:
> On Mon, 12 Nov 2007 21:39:39 +0900, far lock (flock) <floc...@yahoo.it>
> wrote:
>
> > I switch this post in a suggestion: add a sort of extension at the
> > beginning or at the end of the (extension-less) filenames
>
> Is Tools>Advanced>Cache useful?

Not if your source viewer has syntax highlighting that doesn't work
because it depends on the extension of the file. Until this is fixed
(and some other regressions are fixed) I can't use Opera 9.5 at all.

This change actually makes things far _more_ dangerous, because the
sort of people who'd open files in the cache without thinking about it
will still try anyway, only now Windows will ask them what application
they want to use first. They'll pick any old thing, and God only knows
what sort of mess they'll get into.

I've seen it happen. If someone who doesn't know what they're doing
wants to open a file then they'll try and try and try. They're not
going to be put off by the fact that there's no default application.
They'll just choose the first application that looks familiar: Word
or something.

--
Matthew Winn
[If replying by email remove the "r" from "urk"]

Andrew Gregory

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Nov 14, 2007, 6:41:15 AM11/14/07
to
I know this idea will horrify some, but when Opera embeds an SQL engine
(as required by the new client-side storage feature in the WHAT-WG web
apps spec), I wouldn't mind if the entire cache disappeared inside an SQL
database. It would have the dual benefit of hiding the files and names
away from pesky anti-virus apps, plus being able to preserve meta-data
such as MIME-types and the original name.

If opera:cache was enhanced to link to the data so you could do a "Save
target as..." then I'd be quite happy.

Leon Fisk

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Nov 14, 2007, 3:00:56 PM11/14/07
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Maybe, Matthew Winn <o*@matthewwinn.me.urk>
Wrote in <slrnfjjdou.8gf.o*@mwinn.powernet.co.uk>

>On Mon, 12 Nov 2007 22:13:28 +0900, Andrew Gregory <and...@no.spam.scss.com.au.invalid> wrote:
>> On Mon, 12 Nov 2007 21:39:39 +0900, far lock (flock) <floc...@yahoo.it>
>> wrote:
>>
>> > I switch this post in a suggestion: add a sort of extension at the
>> > beginning or at the end of the (extension-less) filenames
>>
>> Is Tools>Advanced>Cache useful?
>
>Not if your source viewer has syntax highlighting that doesn't work
>because it depends on the extension of the file. Until this is fixed
>(and some other regressions are fixed) I can't use Opera 9.5 at all.

I'm going to pile on this too in hopes that it will be
changed or at least we get a choice in the preferences.

I chuck cached image files at an alternate viewer and it
doesn't like/care for the missing extension either.

This behavior was noticed almost right away after the first
9.50 alpha was released. Several of us sounded off about it
at the time, but comments from Opera were pretty much
silent.

--
Leon Fisk
Grand Rapids MI
Remove no.spam for email
Opera 9.24-8816/PII/NT4sp6a

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