Check for 406 status code when handling referrers API endpoint response #2026
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Signed-off-by: Meredith Lancaster <malancas@github.com>
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While using the remote.Referrers function with the Artifactory registry, I found the function was unexpectedly failing. Digging into the error, I found the registry was returning a 406 instead of a 404 when the
remote.Referrersfunction attempted to make a request to the referrers endpoint. Adding http.StatusNotAcceptable to the list of handled status codes intransport.CheckErrorfixed the problem for me.This PR adds
http.StatusNotAcceptableto the list of status codes handled by transport.CheckError. Since it is a 4XX error,remote.Referrersis able to fallback and try the manifests API endpoint.I had filed #1962 asking about this change but realized the change is small enough a pull request might be easier.