I still haven't figured it out, but I found some things. I wrote a small class that removes the header and the crc32/length stuff at the end. Only the remaining data still can't be uncompressed.
So I looked at data compressed with compress() and instantly noticed that it always begins with a short integer (0x78da). There also seems to be some significance to the two (possibly four) bytes at the end but I can't figure it out. Adding 0x78da alone doesn't make it work. I'm out of ideas, does anybody else have any? The class I wrote is attached to this email. I really think this would be useful to everyone, as you could compress any binary file and decompress it within flash. As far as I can tell there's no way to do this right now. On 8/9/06, Max <[EMAIL PROTECTED]> wrote:
It seems your right, I tried removing the header info already, but it looks more complex than I thought. I can actually see the original filename in the header. After all that experimenting with a hex editor I forgot to actually check the file itself. Why is it every time I post on a forum or mailing list about a problem I could've always solved it myself but I overlooked something obvious? I'll get right on this. Tomorrow. Thanks Nicolas, this is not the first time you saved me. On 8/9/06, Nicolas Cannasse < [EMAIL PROTECTED]> wrote: > > I'm writing a program that processes a huge 4MB binary file in Flash 9. > > Thing is, if I compress it (specifically with gzip) I can lower the size to > > 1.67MB. My problem is that I can't uncompress it using ByteArray's > > uncompress() feature on the gzipped file. > > > > The documentation for compress() says that it uses zlib compression. > > Zlib is > > a compression library that is based on gzip. The even use the same > > algorithim, DEFLATE. I'm sure there's a way to do this. > > > > Does anybody have any ideas? Since they're roughly the same it seems like > > all you'd need is to change some header values, but I can't find anything > > myself. > > There's a GZ header before the DEFLATE stream, see > http://www.faqs.org/rfcs/rfc1952.html > > Nicolas > _______________________________________________ > [email protected] > To change your subscription options or search the archive: > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > Brought to you by Fig Leaf Software > Premier Authorized Adobe Consulting and Training > http://www.figleaf.com > http://training.figleaf.com >
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