How to get raw value of `content-type` header in Akka Http?

Question

I am migrating from code spray (version: 1.3.4) to akka-http (version: 10.0.13).

We have an existing clients they send Content-Type like application/vnd.awesome.value; mykey="custom/custom"

Following code works fine in spray but in akka-http parameter (mykey) is stripped off

request.header[`Content-Type`].map { header =>
  // HERE PARAMS IS EMPTY MAP
  val myKeyValue = header.contentType.mediaType.params.get("mykey").map(_.replace("\"", ""))
  myKeyValue.flatMap(_.toMediaType).getOrElse(header.contentType.mediaType)
}.getOrElse(defaultMediaType)

StringToMediaTypeConversion.scala

val customMediaTypes: List[MediaType] = ???
implicit class StringToMediaType(private val str: String) extends AnyVal {
  private def parseMediaType(input: String): Option[MediaType] = MediaType.parse(input).fold(_ => None, Some(_))
  private def isSupportedType(mediaType: MediaType): Boolean = customMediaTypes.contains(mediaType)
  private def extractMediaTypeParamIfExists(mediaType: MediaType): Option[MediaType] = mediaType.params.get("mykey") match {
    case Some(value) => parseMediaType(value)
    case None        => Some(mediaType)
  }

  def toMediaType: Option[MediaType] = parseMediaType(str).flatMap(extractMediaTypeParamIfExists).filter(isSupportedType)

}

Following unit test is working is passing

val customMediaType: Option[MediaType] = """application/vnd.awesome.value; mykey="custom/custom""""".toMediaType
customMediaType should not be None
customMediaType.get.mainType shouldBe "custom"
customMediaType.get.subType shouldBe "custom"

Any help is appreciated.

How to extract raw value? or How to extract param value of media type?

Answer 1

I was registering custom media types as specified in the documentation, if I remove it I am seeing expected behaviour.