Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #30164

Re: Exception in thread "main" java.util.zip.ZipException: Not in GZIP format

Show all headers | View raw

On 23/10/14 09:51, takouarnauld@gmail.com wrote:
> I'm trying in my program to Compress/Decompress data using GZIP streams and when using the charset "ISO-8859-1", everything working well but when changing the charset to "UTF-8", i'm getting the Error message "Exception in thread "main" java.util.zip.ZipException: Not in GZIP format".
> this is my code:

> 	        ByteArrayOutputStream out = new ByteArrayOutputStream();
...
> 	        String outStr = out.toString("UTF-8");

I printed out the bytes from out.toByteArray() and outStr.getBytes("UTF-8"):

Bytes from gzip:
0000: 1F 8B 08 00 00 00 00 00 00 00 CB AD 54 48 49 2C
0010: 49 04 00 29 AD 56 16 07 00 00 00
Bytes as string:
0000: 1F EF BF BD 08 00 00 00 00 00 00 00 CB AD 54 48
0010: 49 2C 49 04 00 29 EF BF BD 56 16 07 00 00 00

The interpretation of the bytes from gzip as UTF-8 fails because 8B 08 
isn't a valid UTF-8 sequence.  The conversion seems to deal with this by 
replacing 8B with EF BF BD, which is the UTF-8 encoding for U+FFFD 
(REPLACEMENT CHARACTER).  It does the same with AD later.


-- 
ss at comp dot lancs dot ac dot uk

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Exception in thread "main" java.util.zip.ZipException: Not in GZIP format takouarnauld@gmail.com - 2014-10-23 01:51 -0700
  Re: Exception in thread "main" java.util.zip.ZipException: Not in GZIP format Martin Gregorie <martin@address-in-sig.invalid> - 2014-10-23 11:19 +0000
  Re: Exception in thread "main" java.util.zip.ZipException: Not in GZIP format Steven Simpson <ss@domain.invalid> - 2014-10-23 14:31 +0100
  Re: Exception in thread "main" java.util.zip.ZipException: Not in GZIP format Mike Amling <mamling@chaff.us> - 2014-10-23 09:30 -0500

csiph-web