If GZIP or ZLIB data is detected in recorded requests, the WebSetEncoding function and the respective parameters are scripted.
If the content encoding header of a response is set to gzip, responses are automatically unzipped with the GZIP algorithm. If the content encoding header is set to deflate, responses are automatically unzipped with either HTTP 1.1 compatible ZLIB algorithm (RFC1950) or raw deflate (RFC 1951).
To ensure backward compatibility, the GZIP transformation DLL is still supported. For more information on how to enable GZIP transformation, see Enabling Customization of GZIP POST Data.