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Re: reading zip file

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From Arne Vajhøj <arne@vajhoej.dk>
Newsgroups comp.lang.java.programmer
Subject Re: reading zip file
Date Thu, 8 Aug 2019 10:48:05 -0400
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On 8/8/2019 10:12 AM, Eric Douglas wrote:
> I'm working on a new client-server application which requires saving client files to disk for every client that runs it.  All files required by the client are in a zip file, hosted by a web service on a local domain server.
> I'm writing the unzipped files to the client machine using this loop.
> 
> ZipEntry zipEntry = null;
> try (ByteArrayInputStream is = new ByteArrayInputStream(zipBytes); ZipInputStream zis = new ZipInputStream(is)) {
>       while ((zipEntry = zis.getNextEntry()) != null) {
> 
> The zipBytes is a byte[] array generated from org.apache.http.util.EntityUtils.toByteArray().  The zip file is currently over 400 MB.  I'm not sure how big this could potentially get.  Do I have to get the entire zip file into memory before extracting?  Should I be concerned how much memory this could require?  Is there a better way?

If the binary ZIP file is URL encoded then it is a big mess.

If the binary zip file is present as binary data, then I think you can
change from:

ZipInputStream zis = new ZipInputStream(new 
ByteArrayInputStream(EntityUtils.toByteArray(entity)));

to:

ZipInputStream zis = new ZipInputStream(entity.getContent());

(code simplified)

Arne

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Thread

reading zip file Eric Douglas <e.d.programmer@gmail.com> - 2019-08-08 07:12 -0700
  Re: reading zip file Arne Vajhøj <arne@vajhoej.dk> - 2019-08-08 10:48 -0400
    Re: reading zip file Eric Douglas <e.d.programmer@gmail.com> - 2019-08-08 08:00 -0700
      Re: reading zip file Arne Vajhøj <arne@vajhoej.dk> - 2019-08-08 11:30 -0400
        Re: reading zip file Eric Douglas <e.d.programmer@gmail.com> - 2019-08-08 08:42 -0700
          Re: reading zip file Andreas Leitgeb <avl@logic.at> - 2019-08-08 17:51 +0000
          Re: reading zip file Arne Vajhøj <arne@vajhoej.dk> - 2019-08-08 17:17 -0400
      Re: reading zip file Joerg Meier <joergmmeier@arcor.de> - 2019-08-08 22:06 +0200
        Re: reading zip file Eric Douglas <e.d.programmer@gmail.com> - 2019-08-08 13:49 -0700
  Re: reading zip file Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2019-08-08 19:49 +0200
    Re: reading zip file Eric Douglas <e.d.programmer@gmail.com> - 2019-08-08 12:58 -0700
      Re: reading zip file Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2019-08-08 22:38 +0200

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