Create IsDownstreamHTTPError method and add error source middleware #1102
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This PR:
backend.IsDownstreamHTTPError
method that can be used by plugins to check if returned HTTP error is downstreamThere was an issue with circular dependencies. I initially tried to move some stuff to
backend/error_source.go
orbackend/experimental/errorsource
, but none of these can be imported in http client, because:backend
importshttpclient
and therefore we can't importbackend
inhttpclient
experimental/errorsource
imports bothbackend
andhttpclient
But then landed with the current solution. Let me know what do you think.