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https://issues.apache.org/jira/browse/COMPRESS-352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15322434#comment-15322434
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Tim Allison edited comment on COMPRESS-352 at 6/9/16 12:49 PM:
---------------------------------------------------------------
So sorry for delay!
I still haven't made time to figure out protobufs. Argh...
I found another implementation of this "dialect" --
[iwana|https://github.com/evernote/iwana/blob/master/iwana-extract/src/main/java/com/evernote/iwana/SnappyNoCRCFramedInputStream.java].
I compared its output to the output with commons, and they are identical.
So, I think a unit test with your current output is good enough for now.
Something like:
{code}
byte[] uncompressed = IOUtils.toByteArray(new FileInputStream(new
File(dir, "snappyIWATest.raw")));
assertEquals(6931, uncompressed.length);
assertEquals(0x23, uncompressed[0]);
assertEquals(0x08, uncompressed[1]);
assertEquals(0x01, uncompressed[2]);
{code}
Thank you, again!!!
was (Author: [email protected]):
So sorry for delay!
I still haven't made time to figure out protobufs. Argh...
I found another implementation of this "dialect" --
[iwana|https://github.com/evernote/iwana/blob/master/iwana-extract/src/main/java/com/evernote/iwana/SnappyNoCRCFramedInputStream.java].
I compared its output to the output with commons, and they are identical.
So, I think a unit test with your current output is good enough for now.
{code}
byte[] uncompressed = IOUtils.toByteArray(new FileInputStream(new
File(dir, "snappyIWATest.raw")));
assertTrue(new String(uncompressed, "US-ASCII").contains("Custom
Format"));
{code}
Thank you, again!!!
> Add snappy decompressor that handles Apple .iwa files
> -----------------------------------------------------
>
> Key: COMPRESS-352
> URL: https://issues.apache.org/jira/browse/COMPRESS-352
> Project: Commons Compress
> Issue Type: New Feature
> Reporter: Tim Allison
>
> On TIKA-1966, one of our users recently shared the newest iOS iWorks files.
> They've gotten rid of internal .zip and now rely exclusively on .iwa files.
> commons-compress doesn't currently appear to handle these
> (snappy-compressed?) files...probably because:
> bq. However, the variant of Snappy that is used does not comply with the spec
> for that format, omitting the stream identifier and checksum.
> from http://fileformats.archiveteam.org/wiki/IWA
> Any chance you'd be able to modify the snappy decompression to handle Apple's
> variant?
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