igmdvc opened a new issue #1660: Override webp lossless decision logic
URL: https://github.com/apache/incubator-pagespeed-ngx/issues/1660
 
 
   Hi,
   
   I have been doing some tests on IPRO to be able to convert from PNG to webp 
lossless, but looking at the documentation it seems it is using the user agent 
to determine that capability. As I plan to have a CDN, it is not recommended to 
have Vary on User-Agent due to poor cache hit ratio.
   
   I was wondering if there is a way to configure pagespeed to force the 
conversion to webp (lossless) just by detecting the webp support in the accept 
header, as some of the test images I am using are not converted when I use 
pagespeed AllowVaryOn Accept;. I know that this is not accurate enough as older 
versions of certain browsers don“t support lossless.
   
   Thanks in advance.

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