[FileUpload] uploaded files get corrupted (just few bytes....)

[Marc Baiges <ma...@gmail.com>]

Hi,
I'm having some problems with my application using the FileUpload package...

I'm working with pdf files and some different users. There's a specific user
who has problems with his uploads. He sends a pdf file of different weights
(from 1mb to 5mb aprox) and the copy that is stored in the file system has
the same file size, but several bytes are changed. Normaly, are from 4 to 12
bytes, usually 4 bytes packets.
for example... a chain  "7B F6 00 43" changes into "C9 8C 45 DB", but all
the other data info has its correct values and in the correct memory
address, just these four bytes change its values. (in the pdf file, this
info belongs to pages with big images, I don't know if it could be
important...)

I'm a bit confused about this problem. I thought it could be something
related to character encoding issues, but what surprises me is that in the
same file, there same "7B F6 00 43" string has some other occurrences and
does not cause error in the other cases.

Anybody has some idea about what to investigate?

Thanks

Marc

Re: [FileUpload] uploaded files get corrupted (just few bytes....)

[Marc Baiges <ma...@gmail.com>]

I'm not sure about the version... I think it's from 2004. I didn't know
about night builds.
I'm looking the logs about what have been the main changes, and there are
things like:

*****************************************
Bug #26194: Specify the encoding (ISO-8859-1) when converting the boundary
to a byte array.

Bug #32654: Detemining content type.
*****************************************

thank you Martin

2005/12/21, Martin Cooper <ma...@apache.org>:
>
> On 12/21/05, Marc Baiges <ma...@gmail.com> wrote:
> >
> > Hi,
> > I'm having some problems with my application using the FileUpload
> > package...
>
>
> You don't say which version of FileUpload you are using. There was a
> problem
> similar to what you are seeing, but that was fixed a long time ago. I
> would
> suggest picking up a recent nightly build and seeing if that fixes the
> problem. FileUpload 1.1 is currently up for a release vote, so a recent
> nightly will be almost identical to what is released within the next few
> days.
>
> --
> Martin Cooper
>
>
> I'm working with pdf files and some different users. There's a specific
> user
> > who has problems with his uploads. He sends a pdf file of different
> > weights
> > (from 1mb to 5mb aprox) and the copy that is stored in the file system
> has
> > the same file size, but several bytes are changed. Normaly, are from 4
> to
> > 12
> > bytes, usually 4 bytes packets.
> > for example... a chain  "7B F6 00 43" changes into "C9 8C 45 DB", but
> all
> > the other data info has its correct values and in the correct memory
> > address, just these four bytes change its values. (in the pdf file, this
> > info belongs to pages with big images, I don't know if it could be
> > important...)
> >
> > I'm a bit confused about this problem. I thought it could be something
> > related to character encoding issues, but what surprises me is that in
> the
> > same file, there same "7B F6 00 43" string has some other occurrences
> and
> > does not cause error in the other cases.
> >
> > Anybody has some idea about what to investigate?
> >
> > Thanks
> >
> > Marc
> >
> >
>
>

Re: [FileUpload] uploaded files get corrupted (just few bytes....)

[Martin Cooper <ma...@apache.org>]

On 12/21/05, Marc Baiges <ma...@gmail.com> wrote:
>
> Hi,
> I'm having some problems with my application using the FileUpload
> package...


You don't say which version of FileUpload you are using. There was a problem
similar to what you are seeing, but that was fixed a long time ago. I would
suggest picking up a recent nightly build and seeing if that fixes the
problem. FileUpload 1.1 is currently up for a release vote, so a recent
nightly will be almost identical to what is released within the next few
days.

--
Martin Cooper


I'm working with pdf files and some different users. There's a specific user
> who has problems with his uploads. He sends a pdf file of different
> weights
> (from 1mb to 5mb aprox) and the copy that is stored in the file system has
> the same file size, but several bytes are changed. Normaly, are from 4 to
> 12
> bytes, usually 4 bytes packets.
> for example... a chain  "7B F6 00 43" changes into "C9 8C 45 DB", but all
> the other data info has its correct values and in the correct memory
> address, just these four bytes change its values. (in the pdf file, this
> info belongs to pages with big images, I don't know if it could be
> important...)
>
> I'm a bit confused about this problem. I thought it could be something
> related to character encoding issues, but what surprises me is that in the
> same file, there same "7B F6 00 43" string has some other occurrences and
> does not cause error in the other cases.
>
> Anybody has some idea about what to investigate?
>
> Thanks
>
> Marc
>
>