[jdev] [ANN] Jive Messenger is now Wildfire Server

Norman Rasmussen norman at rasmussen.co.za
Sun Dec 18 14:29:29 CST 2005

I was recently trying to convert some Java code to C# (to use
SharpZipLib), and I found the 'noHeader' parameters of the Inflater
constructor _HAD_ to be correct otherwise nothing would work.  AFAIK:
the Java implementations have something similar, so you might check
that those values are correct too.

On 12/18/05, Tijl Houtbeckers <thoutbeckers at splendo.com> wrote:
> On Sun, 18 Dec 2005 20:07:54 +0100, Jakob Schroeter <js at camaya.net> wrote:
> > Indeed, debug.log contains the following:
> >
> >  ...
> >  java.util.zip.ZipException: no current ZIP entry
> >  at java.util.zip.ZipOutputStream.write(Unknown Source)
> > ...
> Now, I haven't been looking at the Wildfire source or anything, but it's
> highly unlikely you can write a zlib compatible (as specified in the
> stream compression JEP) output with a ZipOutputStream, since that writes
> output specific to the ZIP file format. For "pure" ZLIB you can use
> DeflaterOutputStream and InflaterInputStream. (ZipOutputStream and
> ZipInputStream actually extend these). However AFAIK these still do not
> give you the ability to do "partial flushes" on your output which is
> needed to get good compression for XMPP.
> Thankfully, there is a lib available to do this:
> http://www.jcraft.com/jzlib/index.html (also explains the problem with the
> Sun implementation a bit more). It's also pure Java so you won't be
> vonurable to any ZLIB exploits.

- Norman Rasmussen
 - Email: norman at rasmussen.co.za
 - Home page: http://norman.rasmussen.co.za/

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