Re: zip freezes - how to handle corrupt CRC in zip-file

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Ah, fine. How do i use this ZIPARCHIVE::CHECKCONS flag? 

Something like that should work, i think?

$zip = new ZipArchive;
$res = $zip->open ( $filename ZIPARCHIVE::CHECKCONS );
if (TRUE === $res) {
    # all looks fine
}
elseif {
    switch($res){
        case ZIPARCHIVE::ER_INCONS:
            # do some error handeling
        break;
    }
    # test these errors
    # ZIPARCHIVE::ER_EXISTS
    # ZIPARCHIVE::ER_INCONS
    # ZIPARCHIVE::ER_INVAL
    # ZIPARCHIVE::ER_MEMORY
    # ZIPARCHIVE::ER_NOENT
    # ZIPARCHIVE::ER_NOZIP
    #  ZIPARCHIVE::ER_OPEN
    # ZIPARCHIVE::ER_READ
    # ZIPARCHIVE::ER_SEEK 
}


Richard Lynch wrote:
> 
> On Tue, August 14, 2007 5:42 am, ecc wrote:
>> i´m reading zip-files with the php zip-functions without a problem.
>> Now i
>> got and Zip containing an corrupt crc (If i open this file via winzip,
>> the
>> error is shown).
>>
>> It looks like the php functions for zip-handeling "zip_entry_read" and
>> "ZipArchive::getFrom..." do not quit on a bad crc checksum.... so
>> these
>> functions read in the file and than are in an infinite loop. Because i
>> use
>> PHP-GTK2 my tool feezes and the process has to be killed. On an
>> web-enviroment this could also a big problem ..... ok, user-zip
>> handeling on
>> web is not the best idea :-)
>>
>> I´ve found no way to find out, if an file in the zip file is an valid
>> or
>> corrupt entry. The output of "ZipArchive::statName" give me no info
>> about
>> the state of an entry.
>>
>> Is there any trick out there, how to manage this problem. Maybe this
>> is an
>> bug or missing feature in the zip extensions. Dont know!
> 
> Perhaps checking the consistency with this ZIPARCHIVE::CHECKCONS flag
> would help.
> 
> This is just a wild guess.
> 
> -- 
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