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I want to configure varnish to generate etag of html requested content (maybe with md5 of html and vary headers) and to deal with 304 and If-None-Match headers.

Is this posible with configuration or vlc scripting?

thanks in advance

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For ETags to work your backend need to generate the correct Etags along with the content. If the Etags are present Varnish will use them.

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