[jira] [Comment Edited] (COMPRESS-508) Bug: cannot get file size of ArchiveEntry using ZipArchiveInputStream

["Peter Lee (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/COMPRESS-508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17072314#comment-17072314 ] 

Peter Lee edited comment on COMPRESS-508 at 4/1/20, 2:35 AM:
-------------------------------------------------------------

Tried with the test.zip. I found that there will be an exception when reading the entry *icon.png.*

I found that this file is using the STORED compression method, and the general purpose bit shows that this entry is using data descriptor.

In this case, you should set the *allowStoredEntriesWithDataDescriptor* as *true* with the constructor of ZipArchiveInputStream, which is false by default.

I can successfully go through all the entries in this zip using the following code(JAVA):
{code:java}
File f = new File("/home/test/test.zip");
InputStream fileInputStream = new FileInputStream(f);
try (ZipArchiveInputStream inputStream = new ZipArchiveInputStream(fileInputStream, ZipEncodingHelper.UTF8, true, true)) {
    ArchiveEntry entry = inputStream.getNextEntry();
    while(entry != null) {
        entry = inputStream.getNextEntry();
        entry = entry;
    }
}
{code}
Please note that I'm using *new ZipArchiveInputStream(fileInputStream, ZipEncodingHelper.UTF8, true, true)*

I'm not familiar with kotlin. Maybe you can try it on yourself.

 

 


was (Author: peterlee):
Tried with the test.zip. I found that there will be an exception when reading the entry *icon.png.*

I found that this file is using the STORED compression method, and the general purpose bit shows that this entry is using data descriptor.

In this case, you should set the *allowStoredEntriesWithDataDescriptor* as *true* with the constructor of ZipArchiveInputStream, which is false by default.

I can successfully go through all the entries in this zip using the following code(JAVA):
{code:java}
// code placeholder
File f = new File("/home/test/test.zip");
 InputStream fileInputStream = new FileInputStream(f);
 try (ZipArchiveInputStream inputStream = new ZipArchiveInputStream(fileInputStream, ZipEncodingHelper.UTF8, true, true)) {
    ArchiveEntry entry = inputStream.getNextEntry();
    while(entry != null) {
        entry = inputStream.getNextEntry();
        entry = entry;
    }
}
{code}
Please note that I'm using *new ZipArchiveInputStream(fileInputStream, ZipEncodingHelper.UTF8, true, true)*

I'm not familiar with kotlin. Maybe you can try it on yourself.

 

 

> Bug: cannot get file size of ArchiveEntry using ZipArchiveInputStream
> ---------------------------------------------------------------------
>
>                 Key: COMPRESS-508
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-508
>             Project: Commons Compress
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: 1.20
>         Environment: Android 9 and Android 10, on both emulator and real device .
>            Reporter: AD_LB
>            Priority: Major
>         Attachments: 2020-03-31_20-53-36.png, ZipTest.zip, test.zip
>
>
> I'm trying to use ZipArchiveInputStream to iterate over the items of a zip file (which may or may not be a real file on the file-system, which is why I use a stream), optionally creating a stream from specific entries.
> One of the operations I need is to get the size of the files within.
> For some reason, it fails to do so. Not only that, but it throws an exception when I'm done with it:
> {code:java}
> Error:org.apache.commons.compress.archivers.zip.UnsupportedZipFeatureException: Unsupported feature data descriptor used in entry ...
> {code}
> I've attached here 3 files:sample project, the problematic zip file (remember that you need to put it in the correct path and grant storage permission), and a screenshot of the issue.
> Note that if I open the file using a third party PC app (such as [7-zip|https://www.7-zip.org/]  ), it works fine, including showing the file size inside.
> Here's the relevant code (kotlin) :
>  
> {code:java}
>         thread {
>             try {
>                 val file = File("/storage/emulated/0/test.zip")
>                 ZipArchiveInputStream(FileInputStream(file)).use {
>                     while (true) {
>                         val entry = it.nextEntry ?: break
>                         Log.d("AppLog", "entry:${entry.name} ${entry.size} ")
>                     }
>                 }
>                 Log.d("AppLog", "got archive ")
>             } catch (e: Exception) {
>                 Log.d("AppLog", "Error:$e")
>                 e.printStackTrace()
>             }
>         }
> {code}



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