ACE Compression Query (deflate / gzip)

[Steev112]

                  HI,

i have one query what the difference between compress default-method  ( deflate / gzip ), and if you can give an example when we can use deflate or gzip?

Thanks

[Cesar Roque]

HI Steven,

this may be useful:

Deflate is a compression method and compressed data format.  It can be  called a "raw" compressed data format, since there is no additional information in a deflate stream such as file names, lengths, check values, etc.  There are not even magic bytes at the start so you can recognize it as a deflate stream.  It is simply the encoding of a string of bytes.  The deflate format is self-terminating, so when decoding, you know when to stop without having an input length.

gzip is a wrapper for the deflate format.  It provides those missing items mentioned, such as magic bytes, file name, modification time, and check values with header and trailer bytes around a deflate stream.  Currently gzip only allows the deflate compression method. Only one deflate stream can be present in a gzip stream, and so effectively can represent only one file.

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Cesar R
ANS Team

[Steev112]

HI Cesar,

Thanks alot for the bove information, now i understood between them.

thanks,

Steven