Enum Encoding 

enum Encoding {
    Protobuf,
    Json,
}

Which body encoding the client sent.

OTLP/HTTP names exactly two, and a request that claims a third has to be refused rather than guessed at: 415 tells the exporter to stop, where mis-decoding it as protobuf produces a 400 that reads like corrupt data. A missing content-type is treated as protobuf, which is what every pre-JSON client that omitted it meant.

Variants

Protobuf

Json