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ASF GitHub Bot logged work on COMPRESS-477: ------------------------------------------- Author: ASF GitHub Bot Created on: 28/Oct/19 08:13 Start Date: 28/Oct/19 08:13 Worklog Time Spent: 10m Work Description: PeterAlfreadLee commented on issue #84: COMPRESS-477 Add support for extracting splitted zip files URL: https://github.com/apache/commons-compress/pull/84#issuecomment-546836930 I just pushed the code of adding support for splitted zip in `ZipArchiveInputStream`. I didn't change much. Just skip the markers here [ if (sig.equals(ZipLong.DD_SIG)) {](https://github.com/apache/commons-compress/blob/205876d6f9eb60ac31f3ec848b23d025f32995ab/src/main/java/org/apache/commons/compress/archivers/zip/ZipArchiveInputStream.java#L370) Sample code: ``` File lastFile = getFile("COMPRESS-477/split_zip_created_by_zip/split_zip_created_by_zip_zip64.zip"); // build the input stream by just concatenating the splitted zips together SeekableByteChannel channel = ZipSplitReadOnlySeekableByteChannel.buildFromLastSplitSegment(lastFile); InputStream inputStream = Channels.newInputStream(channel); ZipArchiveInputStream splitInputStream = new ZipArchiveInputStream(inputStream); ArchiveEntry entry; while((entry = splitInputStream.getNextEntry()) != null) { // read from ZipArchiveInputStream ... } ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 334803) Time Spent: 1.5h (was: 1h 20m) > Support for splitted zip files > ------------------------------ > > Key: COMPRESS-477 > URL: https://issues.apache.org/jira/browse/COMPRESS-477 > Project: Commons Compress > Issue Type: New Feature > Components: Archivers > Affects Versions: 1.18 > Reporter: Luís Filipe Nassif > Priority: Major > Labels: zip > Time Spent: 1.5h > Remaining Estimate: 0h > > It would be very useful to support splitted zip files. I've read > [https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT] and understood > that simply concatenating the segments and removing the split signature > 0x08074b50 from first segment would be sufficient, but it is not that simple > because compress fails with exception below: > {code} > Caused by: java.util.zip.ZipException: archive's ZIP64 end of central > directory locator is corrupt. > at > org.apache.commons.compress.archivers.zip.ZipFile.positionAtCentralDirectory64(ZipFile.java:924) > ~[commons-compress-1.18.jar:1.18] > at > org.apache.commons.compress.archivers.zip.ZipFile.positionAtCentralDirectory(ZipFile.java:901) > ~[commons-compress-1.18.jar:1.18] > at > org.apache.commons.compress.archivers.zip.ZipFile.populateFromCentralDirectory(ZipFile.java:621) > ~[commons-compress-1.18.jar:1.18] > at > org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:295) > ~[commons-compress-1.18.jar:1.18] > at > org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:280) > ~[commons-compress-1.18.jar:1.18] > at > org.apache.commons.compress.archivers.zip.ZipFile.<init>(ZipFile.java:236) > ~[commons-compress-1.18.jar:1.18] > {code} -- This message was sent by Atlassian Jira (v8.3.4#803005)