feat(grpc): preserve unknown detail types when decoding gRPC errors #5905
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| @@ -45,7 +46,7 @@ func ToGRPC(ctx context.Context, err error) error { | |||
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| // If the original error was wrapped with more context than the GRPCStatus error, | |||
| // copy the original message to the GRPCStatus error | |||
| if err.Error() != st.Message() { | |||
| if errorHasMoreContext(err, st) { | |||
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What is the case where we don't want the original details (or ones set in FromGRPC) to not be added into this error?
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AsGRPCStatus() unwraps until it finds something implementing GRPCStatus(). So if we had something like errors.Wrap(errors.Wrap(st.Err(), "foo") "bar"), it would discard the foo: bar: prefix otherwise.
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As for the opposite, st.Err().Error() prepends the code to st.Message() so naively setting the message again would duplicate the prefix that corresponds to the codes.Code.
Check this playground https://go.dev/play/p/UKFRlAyVlYT
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util/grpcerrors/grpcerrors.go
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| if errMessage := err.Error(); len(errMessage) > len(st.Message()) { | ||
| // check if the longer message in errMessage is only due to | ||
| // prepending with the status code | ||
| prefix := st.Code().String() + ": " |
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is this trying to mimic grpcStatusError.Error(). In that case looks like it is more complicated as some codes have special meaning. Type checking to *grpcStatusError could be better.
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I've updated the check to use *grpcStatusError, let me know if that's what you had in mind. Thanks!
If decoding the status fails, retain the original proto message by registering it as a detail. This change also adds a test to verify that unknown types are preserved when: - Decoding a gRPC error with unknown detail types. - Re-encoding and decoding the error using ToGRPC / FromGRPC. Additionally, fix an issue where the codes.Code string prefix was not handled correctly, resulting in a duplicate prefix. Signed-off-by: Alberto Garcia Hierro <[email protected]>
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| // errorHasMoreContext checks if the original error provides more context by having | ||
| // a different message or additional details than the Status. | ||
| func errorHasMoreContext(err error, st *status.Status) bool { | ||
| if errMessage := err.Error(); len(errMessage) > len(st.Message()) { |
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what's this length check for?
If decoding the status fails, retain the original proto message by
registering it as a detail.
This change also adds a test to verify that unknown types are preserved when:
Additionally, fix an issue where the codes.Code string prefix was
not handled correctly, resulting in a duplicate prefix.