ats has problems handling if-none-match requests for compressed objects

[esmq2092]

When using the compress plugin, ats appends the “-df” suffix to the Etag for the generated compressed object.

However, when ats responds to the if-none-match conditional request on the compressed object, it always uses the original Etag（without "-df" suffix）, so it cannot return 304 properly.

currently i use lua plugin to get a workaround.

local c_req_hdr = ts.client_request.header['If-None-Match'] ts.client_request.header['If-None-Match'] = string.gsub(c_req_hdr, "-df", "")

[github-actions[bot]]

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