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Re: Unzipping large ZIP files

From: Jostein Austvik Jacobsen <josteinaj@gmail.com>
Date: Thu, 26 Feb 2015 18:19:28 +0100
Message-ID: <CAOCxfQe=_6KeC=cqnDdo1yHS78i0xGD5F=8Fu2N6Mwi_GN4wFw@mail.gmail.com>
To: "Imsieke, Gerrit, le-tex" <gerrit.imsieke@le-tex.de>
Cc: XProc Dev <xproc-dev@w3.org>
Cool, thanks! I will probably reuse your implementation then. :)

Best regards
Jostein

On 26 February 2015 at 17:48, Imsieke, Gerrit, le-tex <
gerrit.imsieke@le-tex.de> wrote:

> You might have already discovered it in the repo that Martin mentioned,
> but just to make sure you find the unzip extension step, it’s here:
> https://subversion.le-tex.de/common/calabash/lib/ltx/ltx-unzip/
> The calabash configuration that we use is here:
> https://subversion.le-tex.de/common/calabash/lib/ltx/ltx-config.xml
>
> Gerrit
>
> On 26.02.2015 17:36, Kraetke, Martin, le-tex wrote:
> > Hi Jostein,
> >
> > we developed a simple unzip step that extracts a zip file into a output
> > directory. You can either check out our entire calabash repository via
> > SVN here or simply adopt our Java class and xproc-configuration.
> >
> > https://subversion.le-tex.de/common/calabash/
> >
> > The output of the step is a XML representation of the unzip directory.
> > Here is a XProc example:
> >
> > <p:declare-step
> >     xmlns:p="http://www.w3.org/ns/xproc"
> >     xmlns:c="http://www.w3.org/ns/xproc-step"
> >     xmlns:letex="http://www.le-tex.de/namespace"
> >     version="1.0">
> >
> >     <p:input port="source">
> >         <p:empty/>
> >     </p:input>
> >     <p:output port="result"/>
> >
> >     <p:option name="zip" required="true"/>
> >     <p:option name="path" required="true"/>
> >
> >     <p:import href="../ltx-lib.xpl"/>
> >
> >     <letex:unzip name="unzip">
> >         <p:with-option name="zip" select="$zip"/>
> >         <p:with-option name="dest-dir" select="$path"/>
> >         <p:with-option name="overwrite" select="'yes'"/>
> >     </letex:unzip>
> >
> > </p:declare-step>
> >
> > Kind regards,
> >
> > Martin
> >
> > --
> > Martin Kraetke
> > Lead Content Engineer
> > le-tex publishing services GmbH
> >
> > Weissenfelser Str. 84, 04229 Leipzig, Germany
> > Phone +49 341 355356 143, Fax +49 341 355356 543
> > martin.kraetke@le-tex.de, http://www.le-tex.de
> >
> > Registergericht / Commercial Register: Amtsgericht Leipzig
> > Registernummer / Registration Number: HRB 24930
> >
> > Geschäftsführer: Gerrit Imsieke, Svea Jelonek,
> > Thomas Schmidt, Dr. Reinhard Vöckler
> >
> > Am 26.02.2015 um 16:36 schrieb Jostein Austvik Jacobsen:
> >> I want to unzip an EPUB which contains a lot of big image files.
> >>
> >> The EXProc extension step pxp:unzip
> >> <http://exproc.org/proposed/steps/other.html#unzip> seems to require
> >> that I unzip the image files as base64-encoded c:data elements which I
> >> then have to p:store. This loads all the images into memory.
> >>
> >> I want to basically unzip all the contents of a ZIP file to a
> >> directory without loading all its contents into memory. Is there a way
> >> to do this that I'm missing or do I have to implement a custom
> >> extension step for this?
> >>
> >> If unzip gets standardized into XProc 2.0, could a "target" or
> >> "output-dir" option maybe be added that allows unzipping directly to a
> >> directory instead of a c:data element?
> >>
> >> Regards
> >> Jostein
> >
>
>
>
Received on Thursday, 26 February 2015 17:20:20 UTC

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