From: greg <eegreg@...>
Date: 2007-03-15T00:31:54+09:00
Subject: Re: zlib large files problem

ruby -r zlib -e 'puts Zlib::ZLIB_VERSION'
1.2.3

On Mar 14, 8:15 am, "eden li" <eden...@gmail.com> wrote:
> strange... all I can think of is that the ruby installer you used has
> a foobar'ed zlib1.dll.  Have you tried upgrading to 1.8.5?  Also, what
> version ofzlibdoes your ruby claim to have?
>
> > ruby -rzlib-e 'putsZlib::ZLIB_VERSION'
>
> 1.2.3
>
> On Mar 14, 10:13 am, "greg" <eeg...@gmail.com> wrote:
>
> > ruby -v
> > ruby 1.8.4 (2006-04-14) [i386-mswin32]
>
> > I should also say that the same code I am using works fine on a file
> > of 20MB that expands to 60MB
>
> > does the zip gem (or any other gem) handle .gz files?
>
> > Thanks,
> > Greg
>
> > On Mar 13, 7:56 pm, "eden li" <eden...@gmail.com> wrote:
>
> > > The default decompress method works for me...
>
> > > $ irb -rzlib
> > > irb(main):001:0> File.stat('threehundred.gz').size / (1024**2)
> > > => 81
> > > irb(main):002:0>Zlib::GzipReader.open('threehundred.gz') { |r|
> > > File.open('threehundred', 'wb') { |f| f.write r.read } }
> > > => 314835846
> > > irb(main):003:0> File.stat('threehundred').size / (1024**2)
> > > => 300
>
> > > What version of ruby are you using?
>
> > > On Mar 14, 2:42 am, "greg" <eeg...@gmail.com> wrote:
>
> > > > I am trying to decompress a 80MB file (decompresses to 300MB), but I
> > > > keep getting a buffer error.  I thought I had a workaround using
> > > > chunks, but it fails with 20M left to go.  Any help or suggestions are
> > > > greatly appreciated.
>
> > > > in `read': buffer error (Zlib::BufError)
>
> > > > classZlib::GzipReader
> > > >   def each_chunk(chunk_size=1024)
> > > >     yield read(chunk_size) until eof
> > > >   end
> > > > end
>
> > > > gz =Zlib::GzipReader.open(zip_file)
>
> > > > File.open( non_zip_file, 'wb' ) do |f|
> > > >   gz.each_chunk {|chunk| f.write(chunk)}
> > > > end