Vary header and cache_key

[Guilherme]

Hello!

Before Nginx 1.7.7, the file name in a cache was a result of applying the
MD5 function to the cache_key.

Now the file name, when Vary header is present in a response of the proxied
request, is not the MD5 of the cache_key anymore.

The above requests generate two different cache files (response header
include *Vary: Accept-Encoding*):

curl -H 'Accept-Encoding: gzip' http://example.com/script.js
curl http://example.com/script.js

*proxy_cache_key: *$scheme://$http_host$uri$is_args$args


How is calculated the file name in this case?

Tks,

Guilherme
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