def call(env)
status, headers, body = @app.call(env)
if etag_status?(status) && etag_body?(body) && !skip_caching?(headers)
original_body = body
digest, new_body = digest_body(body)
body = Rack::BodyProxy.new(new_body) do
original_body.close if original_body.respond_to?(:close)
end
headers[ETAG_STRING] = %(W/"#{digest}") if digest
end
unless headers[CACHE_CONTROL]
if digest
headers[CACHE_CONTROL] = @cache_control if @cache_control
else
headers[CACHE_CONTROL] = @no_cache_control if @no_cache_control
end
end
[status, headers, body]
end