如何尽可能折叠这些指令?
我能够将三个指令折叠到 mainHeader 中,但如何包括身份验证和响应与媒体类型?
val mainHeaders = cors & headerValueByName("Access_Token") & headerValueByName("Tenant_Name")
override def getLayer = path("api" / Segment / "model" / "layers") { modeledSystemName =>
mainHeaders { (accessToken, tenantName) =>
authenticate(validate(accessToken)) { authInfo =>
respondWithMediaType(`application/json`) {
get {
onComplete(service.getlayers(modeledSystemName, tenantName)) {
case Success(layers) => complete(layers)
//case Success(None) => complete(NotFound, "Release version not found")
case Failure(ex) => complete(InternalServerError, s"An error occurred: ${ex.getMessage}")
}
}
}
}
}
}
喷雾路线超级复杂,所以你可以做任何你想做的事情。例如,我会这样写这条路线:
val authWithHeader = headerValueByName("Access_Token")
.flatMap(accessToken => authenticate(validate(accessToken)))
val authenticatedJsonRoute = cors &
authWithHeader &
headerValueByName("Tenant_Name") &
respondWithMediaType(MediaTypes.`application/json`)
override val getLayer =
(get & path("api" / Segment / "model" / "layers")) { modeledSystemName =>
authenticatedJsonRoute { (authInfo, tenantName) =>
onComplete(service.getlayers(modeledSystemName, tenantName)) {
case Success(layers) => complete(layers)
//case Success(None) => complete(NotFound, "Release version not found")
case Failure(ex) => complete(InternalServerError, s"An error occurred: ${ex.getMessage}")
}
}
}
让我解释一下这段代码。首先,我创建了读取标头值的指令authWithHeader
,然后使用此值进行身份验证。它超级简单,所有的魔术都由flatMap
完成。
然后,我创建了authenticatedJsonRoute
它只是其他简单指令的组合。合成魔术是通过&
运算符完成的(在这种情况下,我将其发音为"然后"),并且这些指令将按顺序执行。
最后,我在完整的路线getLayer
中使用了我编写的指令 authenticatedJsonRoute
。