[lnkForumImage]
TotalShareware - Download Free Software
Confronta i prezzi di migliaia di prodotti.
Asp Forum
 Home | Login | Register | Search 


 

Forums >

comp.lang.ruby

Windows platform, test if a file is fully flushed to disk.

Brian Wallace

4/17/2009 8:32:00 PM

[Note: parts of this message were removed to make it a legal post.]

Hi all,

I've written a Ruby script that scans a directory for new files at a
specified interval, using Directory_Watcher (Thanks for the great gem Tim
Pease!), and when a new file is added to the directory - it streams it off
to my Web Application.

The problem I'm having is with large files that take a long time to copy
into a folder in Windows, the file is added and picked up immediately ... So
the application tries to begin streaming, but ends up getting a
"Errno::EACCES: Permission denied" on the file because it is still being
copied.

I've been trying to find a way to test a file in windows to see if it is
readable/writable? I've tried all of the usual ruby methods:

File.size = reports the total size of the file, even if its still copying
File.readable? ==> always returns true even during the copy
File.writeable? ==> always returns true even during the copy.

So I guess my question is: Does anyone know how to test if a file is
complete in Windows?

Thanks,

Brian
2 Answers

Eric Hodel

4/17/2009 8:36:00 PM

0

On Apr 17, 2009, at 13:32, Brian Wallace wrote:
> The problem I'm having is with large files that take a long time to
> copy
> into a folder in Windows, the file is added and picked up
> immediately ... So
> the application tries to begin streaming, but ends up getting a
> "Errno::EACCES: Permission denied" on the file because it is still
> being
> copied.
>
> I've been trying to find a way to test a file in windows to see if
> it is
> readable/writable? I've tried all of the usual ruby methods:
>
> File.size = reports the total size of the file, even if its still
> copying
> File.readable? ==> always returns true even during the copy
> File.writeable? ==> always returns true even during the copy.
>
> So I guess my question is: Does anyone know how to test if a file is
> complete in Windows?

Why not rescue Errno::EACCESS and retry at a later time?

Brian Wallace

4/17/2009 9:52:00 PM

0

[Note: parts of this message were removed to make it a legal post.]

Thanks for replying Eric..

Obviously I'm fairly inexperienced and didnt even think that :) I guess I'll
have to focus on learning the proper ways to use rescue / retry.


On Fri, Apr 17, 2009 at 4:36 PM, Eric Hodel <drbrain@segment7.net> wrote:

> On Apr 17, 2009, at 13:32, Brian Wallace wrote:
>
>> The problem I'm having is with large files that take a long time to copy
>> into a folder in Windows, the file is added and picked up immediately ...
>> So
>> the application tries to begin streaming, but ends up getting a
>> "Errno::EACCES: Permission denied" on the file because it is still being
>> copied.
>>
>> I've been trying to find a way to test a file in windows to see if it is
>> readable/writable? I've tried all of the usual ruby methods:
>>
>> File.size = reports the total size of the file, even if its still copying
>> File.readable? ==> always returns true even during the copy
>> File.writeable? ==> always returns true even during the copy.
>>
>> So I guess my question is: Does anyone know how to test if a file is
>> complete in Windows?
>>
>
> Why not rescue Errno::EACCESS and retry at a later time?
>
>