Convert Kafka headers to HTTP headers

[KevinMengSF]

Hello,

Would it be possible to add the feature of converting Kafka headers to HTTP headers?

1. There is one scenario that for some events stored in Kafka by CloudEvent "Binary Content Mode" or "Structured Content Mode" format.

There is a mapping relationship between Kafka and HTTP, more details please check:
https://github.com/cloudevents/spec/blob/v1.0.1/http-protocol-binding.md#3-http-message-mapping