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Add middleware.NextOrFailure (#462)

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This checks if the next middleware to be called is nil, and if so returns
ServerFailure and an error. This makes the next calling more robust and
saves some lines of code.

Also prefix the error with the name of the middleware to aid in
debugging.
This commit is contained in:
Miek Gieben
2016-12-20 18:58:05 +00:00
committed by GitHub
parent 451a0bd529
commit c4ab98c6e3
23 changed files with 51 additions and 67 deletions
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2
middleware/backend_lookup.go
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@@ -410,7 +410,7 @@ func BackendError(b ServiceBackend, zone string, rcode int, state request.Reques
state.SizeAndDo(m)
state.W.WriteMsg(m)
// Return success as the rcode to signal we have written to the client.
return dns.RcodeSuccess, nil
return dns.RcodeSuccess, err
}
// ServicesToTxt puts debug in TXT RRs.