From: Axel Etzold <AEtzold@...>
Date: 2008-07-13T23:44:13+09:00
Subject: Re: [rubyzip + open-uri] reading zipfiles from a url?


-------- Original-Nachricht --------
> Datum: Sun, 13 Jul 2008 22:50:21 +0900
> Von: David Masover <ninja@slaphack.com>
> An: ruby-talk@ruby-lang.org
> Betreff: Re: [rubyzip + open-uri] reading zipfiles from a url?

> On Wednesday 02 July 2008 06:49:26 Janus Bor wrote:
> 
> > url = "http://www.cibiv.at/%7Ephuong/vien/8a375.zip"
> > zip_file = Zip::ZipFile.open(url)
> 
> Maybe there is a right way to do this...
> 
> I'm going to argue that it would be difficult at best. Zip files store 
> metadata, such as compressed file location, at the end of the file. After 
> that, you'd want to seek somewhere in the middle. Since open-uri is
> probably 
> meant to issue a single, straightforward HTTP request (that is, ask for
> the 
> whole file, from beginning to end), I'm not sure this would work well.
> 
> But that's just an educated guess.
> 
> Depending on how portable you need this to be, you might consider the 
> FUSE-based HTTPFS:
> 
> http://httpfs.sourceforge.net/
> 
> When I last tried this, performance was pretty terrible -- no caching, and
> it 
> would fetch the file in blocks, so _many_ separate HTTP requests. But it 
> would probably do what you want.


Hi ---

there is also rio  (http://rio.rubyforge.org/):

# Copy a file from a ftp server into a local file un-gzipping it
 rio('ftp://host/afile.gz').gzip > rio('afile')

I have no idea what its performance would be.

Best regards,

Axel 

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