Req #78915 [Opn->Fbk]: Make zip streams seekable

From: Date: Wed, 18 Mar 2020 13:37:16 +0000
Subject: Req #78915 [Opn->Fbk]: Make zip streams seekable
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-226155@lists.php.net to get a copy of this message
Edit report at https://bugs.php.net/bug.php?id=78915&edit=1

 ID:                 78915
 Updated by:         remi@php.net
 Reported by:        arava dot box at gmail dot com
 Summary:            Make zip streams seekable
-Status:             Open
+Status:             Feedback
 Type:               Feature/Change Request
 Package:            Zip Related
 Operating System:   ubuntu 18.04
 PHP Version:        7.3.12
 Block user comment: N
 Private report:     N

 New Comment:

From libzip documentation: zip_fseek only works on uncompressed (stored) data. When called on
compressed data it will return an error.

So doesn't seems to be doable.

I propose to close as wont fix


Previous Comments:
------------------------------------------------------------------------
[2019-12-05 16:25:13] cmb@php.net

Thanks for the explanation!

I assume that zip streams are not seekable, because fseek()[1] has
only introduced recently (and maybe zip streams are already
seekable if ext/zip has been built against libzip >= 1.2.0?).
Anyhow, that wouldn't be a bug, but rather a feature request.

And yes, the current behavior should be documented anyway.  I'll
see to it, unless somebody else beats me to it.

[1] <https://libzip.org/documentation/zip_fseek.html>

------------------------------------------------------------------------
[2019-12-05 15:55:05] arava dot box at gmail dot com

Hello. Well, actually both of them. 

zip:// is not seekable, and if that's wrong then why it's not documented.

Anyway, I am wondering to know why compress://zlib is seekable.

Thx

------------------------------------------------------------------------
[2019-12-05 14:36:03] cmb@php.net

What's the bug you are reporting?  Is it that zip:// streams are
not seekable?  Or is it that this is not documented?

------------------------------------------------------------------------
[2019-12-05 13:54:11] arava dot box at gmail dot com

Description:
------------
---
From manual page: https://php.net/wrappers.compression
---


Test script:
---------------
$sourceHandle = new SplFileObject('zip://file.zip#content.txt', 'r');
//...
$sourceHandle->seek(PHP_INT_MAX);
$sourceHandle->rewind();


// SplFileObject::seek(): stream does not support seeking



------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=78915&edit=1


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