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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
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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 [2011-05-01 14:15 UTC] seva dot lapsha at gmail dot com
zip:// stream wrapper doesn't support streams created from sources other than 
files. E.g. reading from zip:// will fail with


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

Test script:
$res = fopen('zip://');

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

Actual result:
Reading from zip wrapped URL gives warning:

fopen(zip:// failed to open stream: operation failed


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 [2011-05-01 14:24 UTC]
-Status: Open +Status: Bogus
 [2011-05-01 14:24 UTC]
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.
 [2011-05-01 15:18 UTC]
-Status: Bogus +Status: Open
 [2011-05-01 15:18 UTC]
ZipStream are something different but it is not supported anyway. Moving to FR.
 [2018-03-26 16:02 UTC]
-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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