Edit report at http://bugs.php.net/bug.php?id=52091&edit=1
ID: 52091
Comment by: schmale at froglogic dot com
Reported by: hardcorevenom at gmx dot de
Summary: ZipArchive: CRC32 errors / corrupted archives not
reported
Status: Assigned
Type: Bug
Package: Zip Related
Operating System: Linux
PHP Version: 5.2.13
Assigned To: pajoye
Block user comment: N
Private report: N
New Comment:
Not the same bug, but related, as "ZipArchive::extractTo" seems to fail
in giving a meaningful return value at all.
I used the method and specified an existing directory without write
privileges, and got TRUE as return value (although
"ZipArchive::extractTo" didn't do anything, due to lack of write
privileges).
Previous Comments:
------------------------------------------------------------------------
[2010-06-23 18:38:26] hardcorevenom at gmx dot de
File "_test.php" is bad in this archive
http://www-user.tu-chemnitz.de/~womar/test/zipview/test_broken.zip
Can be seen here:
http://www-user.tu-chemnitz.de/~womar/test/zipview/ziptest.php?file=test_broken.zip
------------------------------------------------------------------------
[2010-06-20 17:57:17] [email protected]
Do you have an archive to reproduce this problem (small if possible :)?
------------------------------------------------------------------------
[2010-06-16 00:35:49] hardcorevenom at gmx dot de
"Actual result" should be
CRC32 errors are reported not always.
------------------------------------------------------------------------
[2010-06-15 23:29:45] hardcorevenom at gmx dot de
Summary modified.
------------------------------------------------------------------------
[2010-06-15 23:26:34] hardcorevenom at gmx dot de
Description:
------------
I corrupted a file using a hex editor.
"echo shell_exec('unzip -t file')" shows the CRC32 mismatch.
ZipArchive::extractTo() doesn't report CRC32 errors.
Reading a stream received from ZipArchive::getStream('myfile') echoes a
CRC error if the number of bytes read with one fread() is below 2157
bytes.
Test script:
---------------
$zip = new ZipArchive();
if ($zip->open('test.zip')) {
zip->extractTo('mydir'); //no error printed
$fp = $z->getStream('brokenfile');
while (!feof($fp)) {
$buf .= fread($fp, 2048+108); //CRC error printed
}
$fclose($fp);
$fp = $z->getStream('brokenfile');
while (!feof($fp)) {
$buf .= fread($fp, 2048+109); //CRC error NOT printed
}
$fclose($fp);
zip.close()
}
Expected result:
----------------
A CRC32 error report that can be handled.
The one from "fread($fp, 2048+108)" is fine: "Warning: fread()
[function.fread]: Zip stream error: CRC error in ..." (can be handled
with "ob_get_contents()");
For "ZipArchive::extractTo()" the corrupt file(s) should be printed.
Actual result:
--------------
CRC32 errors are reported always.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=52091&edit=1
