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Request #54645 zip:// stream wrapper does not allow wrapping of non-filesystem http:// streams
Submitted: 2011-05-01 14:15 UTC Modified: 2018-03-26 16:02 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: seva dot lapsha at gmail dot com Assigned:
Status: Open Package: Zip Related
PHP Version: 5.3.6 OS:
Private report: No CVE-ID: None
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From: seva dot lapsha at gmail dot com
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 [2011-05-01 14:15 UTC] seva dot lapsha at gmail dot com 
Description:
------------
zip:// stream wrapper doesn't support streams created from sources other than 
files. E.g. reading from zip://http://example.com/file.zip will fail with

Warning: 

As far as I can see, this is just not implemented in ZipArchive.

Test script:
---------------
$res = fopen('zip://http://example.com/file.zip');

Expected result:
----------------
Reading from zip wrapped URL should be possible.

Actual result:
--------------
Reading from zip wrapped URL gives warning:

fopen(zip://http://example.com/file.zip): failed to open stream: operation failed

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 [2011-05-01 14:24 UTC] pajoye@php.net
-Status: Open +Status: Bogus
 [2011-05-01 14:24 UTC] pajoye@php.net 
it does support non file system, but the file system must be seekable, which is 
not the case for http.
 [2011-05-01 15:13 UTC] seva dot lapsha at gmail dot com 
back-seeking may be needed for more complex operations in ZipArchive, but to read 
a stream directly from the Zip archive, it's not required.

For instance, there is a Java Zip Input Stream, which is buffered but not seeking.
http://download.oracle.com/javase/6/docs/api/java/util/zip/ZipInputStream.html
 [2011-05-01 15:18 UTC] pajoye@php.net
-Status: Bogus +Status: Open
 [2011-05-01 15:18 UTC] pajoye@php.net 
ZipStream are something different but it is not supported anyway. Moving to FR.
 [2018-03-26 16:02 UTC] cmb@php.net
-Type: Bug +Type: Feature/Change Request
 [2021-04-15 19:36 UTC] steveh at brendata dot co dot uk 
I think this needs to be in the documentation, in the zlib wrapper as requiring that the wrapper be seekable, and an extra row in documentation table for each wrapper to indicate whether it's seekable or not?
 
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