🚀 go-pugleaf

Ronaldo wrote:

> 
> Hi all !! My name is Ronaldo. I4m from Brazil.
> Im having a hard time on reading a file generated by a Software
> created through Delphi, its not a regular text file, though it is a
> file that was generated by a component, which main goal is to
> compress any file using a Zlib, and then to save the bytes from that
> compressed file as binary fields. That was just a brief introduction
> so as you can have an idea of the general issue My real problem is
> reading the header and the footer generated by that component (I do
> not have any problem in reading and decompressing the data compressed
> with Zlib). At that header, there is information, such as backup
> title, size of the backup title, total bytes from the original file,
> total files in backup, the size in bytes of the path + name of the
> file that was compressed, path + name of the file compressed, date &
> time of last update on that file, and a signature EC2 or ECS,
> where the first one indicates that the content is compressed, and the
> second one indicates that is not The component writes some data with
> more frequency; if I manage to read those, I think Ill be able of
> reading the others. I created a Delphi code very simple in order to
> generate that header, and another one, to read it. I did the same in
> Java. However, what I generate in Delphi, cannot be read in Java, and
> vice versa.  Im going to leave here the source codes in Java and
> Delphi, in case someone can help me out. Probably somebody already
> passed through this issue, or at least knows both languages.
> 
> I appreciate your help in advance, and apologize for the size of this
> message.

Without going into your code in too much detail, I would guess that the
problem you're experiencing is byte order.  Delphi is Intel-based and
so writes/reads the low byte first; Java is platform-independent and
writes/reads the high byte first.

I strongly suggest that if you're trying to write code to read a ZIP
file that you start with a known good ZIP file, run it through the
Delphi and Java readers, and determine which one breaks.  Creating a
file with one language and reading it with another doesn't tell you
which one is at fault; you need the independent arbiter of a known good
ZIP file.

-- 
Kevin Dean [TeamB]
Dolphin Data Development Ltd.
http://www.datadevelopment.com/

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