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Groups > comp.lang.ruby > #6521

Re: Zlib::GzipReader doesn't work as expected

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Am 25.04.2012 21:03, schrieb Robert Klemme:
>> How do I force Zlib::GzipReader do read the whole file?
>
> That's a fairly common limitation of GZip libs (Java's standard lib also
> has this limitation, or at least hat last time I checked).
>
> You might get away with wrapping the GzipReader around an open IO object
> and wrapping another GzipReader when the first finishes.

Thank you.

I found the following thread:
http://www.velocityreviews.com/forums/t866074-zlib-gzipreader-and-multiple-compressed-blobs-in-a-single-stream.html

and that code works with ruby 1.9.3p0:

require 'stringio'
require 'zlib'

def inflate(filename)
   File.open(filename) do |file|
     zio = file
     loop do
       io = Zlib::GzipReader.new zio
       puts io.read
       unused = io.unused
       io.finish
       break if unused.nil?
       zio.pos -= unused.length
     end
   end
end

inflate "foo.gz"

Regards,
Thomas

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Thread

Zlib::GzipReader doesn't work as expected Thomas Wolf <thomasw@viacanale.de> - 2012-04-25 10:57 +0200
  Re: Zlib::GzipReader doesn't work as expected Robert Klemme <shortcutter@googlemail.com> - 2012-04-25 21:03 +0200
    Re: Zlib::GzipReader doesn't work as expected Simon Krahnke <overlord@gmx.li> - 2012-04-25 21:55 +0200
    Re: Zlib::GzipReader doesn't work as expected Thomas Wolf <thomasw@viacanale.de> - 2012-04-26 11:54 +0200
      Re: Zlib::GzipReader doesn't work as expected Simon Krahnke <overlord@gmx.li> - 2012-04-26 22:02 +0200
  Re: Zlib::GzipReader doesn't work as expected Simon Krahnke <overlord@gmx.li> - 2012-04-25 21:53 +0200

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