A modern programming language that makes developers happier.

kotlinlang

Ktor Client: Is there anything built in that generates an HMAC over the request body and allows you to set the value as a header? I found StatelessHmacNonceManager but at least my understanding is that while it generates an HMAC, it's not generated over the request body

Unfortunately, there is no such built-in functionality in Ktor. You can intercept the `HttpSendPipeline`  at the `Monitoring` phase (or create a hook) to get access to the request body before sending. In the handler, the request body can be cast to the non-streaming type `OutgoingContent.ByteArrayContent` to get the request body as a byte array. The code from the `StatelessHmacNonceManager`  class can be used to generate an HMAC of the body and append it to the request as a header.