Uploaded image for project: 'Commons Compress'
  1. Commons Compress
  2. COMPRESS-189

ZipArchiveInputStream may read 0 bytes when reading from a nested Zip file

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 1.4.1
    • Fix Version/s: 1.5
    • Component/s: Archivers
    • Labels:
      None
    • Environment:

      JDK 1.6 64-bit, Windows 7

      Description

      When the following code is run an error "Underlying input stream returned zero bytes" is produced. If the commented line is uncommented it can be seen that the ZipArchiveInputStream returned 0 bytes. This only happens the first time read is called, subsequent calls work as expected i.e. the following code actually works correctly with that line uncommented!

      The zip file used to produce this behavious is available at http://wwmm.ch.cam.ac.uk/~dl387/test.ZIP

      If this is not the correct way of processing a zip file of zip files please let me know. Also I believe whilst ZipFile can iterate over entries fast due to being able to look at the master table whilst ZipArchiveInputStream cannot. Is there anyway of instantiating a ZipFile from a zip file inside another zip file without first extracting the nested zip file?

      ZipFile zipFile = new ZipFile("C:/test.ZIP");
      for (Enumeration<ZipArchiveEntry> iterator = zipFile.getEntries(); iterator.hasMoreElements(); ) {
      ZipArchiveEntry entry = iterator.nextElement();
      InputStream is = new BufferedInputStream(zipFile.getInputStream(entry));
      ZipArchiveInputStream zipInput = new ZipArchiveInputStream(is);
      ZipArchiveEntry innerEntry;
      while ((innerEntry = zipInput.getNextZipEntry()) != null){
      if (innerEntry.getName().endsWith("XML"))

      { //zipInput.read(); System.out.println(IOUtils.toString(zipInput)); }

      }
      }

        Attachments

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              dan2097 Daniel Lowe
            • Votes:
              1 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: