From: Guido de Melo <guido.de-melo@...>
Date: 2005-11-15T01:07:16+09:00
Subject: Re: trouble reading a gzipped xml-file

Thank you very much! You solved it!

Robert Klemme wrote:
>>>You're not closing f here.
>>[...]
>>>I'm not so sure that it fails just because of this.
>>
>>It shouldn't, because ruby will determine the end of the file by
>>itself and close the handle on exiting.
> 
> I didn't mean to say that it fails because of the open file.  My point
> with the first remark was that it's a good habit to open files for only as
> long as they are actually used.  The block form is the idiom of choice
> here: it's not much longer as a simple File.open() or File.new() and it
> ensures the file is always properly closed.

You are right of course, I will try to do this in the future.

> But you can do this
> 
> xmldoc = Zlib::GzipReader.open('file.dia') {|gz| REXML::Document.new(
> gz.read )}

And this worked perfect for me :-)

> If there is no exception during GZIP reading I guess there might be a bug
> somewhere.  As a test I'd write the gunzipped content to another file and
> do a diff on the plain xml and this output to see whether GzipReader
> actually yields the same content.

They do

> Btw, did you actually try to make REXML read the first variant?  Maybe you
> have a problem in your XML file.

Thank goodness the XML produced by dia is sound :-)

Kind regards,
Guido