scala - Akka-http and handling an empty body during POST -


suppose handling post message.

the content-type may application/xml or application/json. can unmarshal xml , json documents fine.

however, handle case post method called empty body (the content-type may still xml or json, document empty string). various logging , analytics purposes. right now, method fails since empty body cannot processed either 1 of unmarshallers.

how write unmarshaller case? or can unmarshaller handle null body?

somewhere in code have following. need more marshallers?

  implicit def myunmarshaller(implicit mat: materializer): fromentityunmarshaller[myclass] =     unmarshaller.firstof[httpentity, myclass](       /* mynullbodymarshaller, */ // need this?       myjsonunmarshaller,        myxmlunmarshaller     )

or can modify existing one? example, one?

def myjsonunmarshaller(implicit mat: materializer): fromentityunmarshaller[myclass] =     unmarshaller.bytestringunmarshaller.forcontenttypes(mediatypes.`application/json`).mapwithcharset { (data, charset) ⇒       val input: string = if (charset == httpcharsets.`utf-8`) data.utf8string else data.decodestring(charset.niocharset.name)       val tmp = input.parsejson.convertto[myclass]       myclass(tmp.a, tmp.b)     }


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