tomayac opened a new issue #1975: Only serves Brotli when `Accept-Encoding` header demands it exclusively URL: https://github.com/apache/incubator-pagespeed-mod/issues/1975 Chrome sends the following `Accept-Encoding` header: `accept-encoding: gzip, deflate, br`. This leads mod-pagespeed to serve `gzip` instead of `br`: ```bash $ curl -I -s -H 'Accept-Encoding: gzip, deflate, br' https://blog.tomayac.com/css/main.css | grep content-encoding content-encoding: gzip ``` However, when Brotli is requested *exclusively*, then `br` is correctly returned: ```bash $ curl -I -s -H 'Accept-Encoding: br' https://blog.tomayac.com/css/main.css | grep content-encoding content-encoding: br ``` Brotli should probably always be favored if the server *and* the client support it, even if for compatibility reasons other additional encoding formats are requested by the client.
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