jazzlib-discuss — List for discussion of jazzlib

Re: [Jazzlib-discuss] ZipExecption

[Jochen H. <Hoe...@In...>]

On Wednesday 22 September 2004 19:55, Hulse, Michael wrote:
> Hi,
> =20
> I'm kind of new to using zip in Java so please excuse.
> =20
> I have just downloaded jazzlib 0.07 and I am trying to unzip a file that=
=20
> I can mount in NetBeans and see it's contents.
> =20
> My error is=20
>  net.sf.jazzlib.ZipException: Wrong Local header signature: a5a4d

This looks like an exe file, probably a self-extracting zip file, which sta=
rts
with some executable program and after that follows the zip archive.

The jazzlib.ZipInputStream can only handle pure zip files without anything
in front. I think java.util.zip.ZipInputStream has a similar behaviour.  Th=
e main
reason is that for those self-extracting files one normally seeks to the en=
d of=20
the file, where the table of contents is stored, and then seeks back to the=
=20
first entry. This is not possible for input stream as they are not seekable.

  Jochen

=2D-=20
Jochen Hoenicke, University of Oldenburg, 26111 Oldenburg, Germany
Email: hoe...@in...  Tel: +49 441 798 3124

[Jazzlib-discuss] ZipExecption

[Hulse, M. <mh...@ca...>]

Hi,
 
I'm kind of new to using zip in Java so please excuse.
 
I have just downloaded jazzlib 0.07 and I am trying to unzip a file that 
I can mount in NetBeans and see it's contents.
 
My error is 
 net.sf.jazzlib.ZipException: Wrong Local header signature: a5a4d

       java/lang/Throwable.<init>(Ljava/lang/String;)V+4 (Throwable.java:85)

       java/lang/Exception.<init>(Ljava/lang/String;)V+1 (Exception.java:33)

       java/io/IOException.<init>(Ljava/lang/String;)V+1
(IOException.java:38)                                                    
       net/sf/jazzlib/ZipException.<init>(Ljava/lang/String;)V+1
(ZipException.java:70)                                           
 
net/sf/jazzlib/ZipInputStream.getNextEntry()Lnet/sf/jazzlib/ZipEntry;+77(Zip
InputStream.java:156)                         
 
com/cavtel/rswt/CopyIFStoDB400rcl.getZipStream(Lcom/ibm/as400/access/IFSJava
File;)Lnet/sf/jazzlib/ZipInputStream;+0 (CopyIF
 StoDB400rcl.java:343)

       com/cavtel/rswt/CopyIFStoDB400rcl.copyIFS()V+0
(CopyIFStoDB400rcl.java:80)                                                 
       com/cavtel/Util/DataQueTestMonitorRecl.main([Ljava/lang/String;)V+0
(DataQueTestMonitorRecl.java:25)   
 
My code is:
 
        try{
            zipin = new ZipInputStream(new
FileInputStream(_ifsjf.getAbsolutePath()));
            ZipEntry ze = null;
            ze = zipin.getNextEntry();
                System.out.println("zipin.available():     " +
zipin.available());
                System.out.println("Zip getName:           " +
ze.getName());
                System.out.println("Zip getCompressedSize: " +
ze.getCompressedSize());
                System.out.println("Zip getCrc:            " + ze.getCrc());
                System.out.println("Zip getSize:           " +
ze.getSize());
                System.out.println("Zip isDirectory:       " +
ze.isDirectory());
                System.out.println("Zip toString:          " +
ze.toString());
        }
                    
If there is something else I need to do please let me know.  If this looks
ok then why can NetBeans read it?  I'm just stuck.  Any help would be
appreciated.  
 
Thanks,
Mike