从JSON文件中读取头文件，并使用Play in SCALA将API调用中的头设置为元组

libraryDependencies += "com.typesafe.play" %% "play-json" % "2.9.2"

import play.api.libs.json._

object JsonReader {
  def readHeaderFromFile(filePath: String): Option[(String, String)] = {
    val json = Json.parse(scala.io.Source.fromFile(filePath).mkString)
    val header = (json \ "header").asOpt[String]
    val value = (json \ "value").asOpt[String]
    header.flatMap(h => value.map(v => (h, v)))
  }
}

import play.api.libs.ws._
import scala.concurrent.Future

object ApiCaller {
  def callApiWithHeader(header: (String, String)): Future[WSResponse] = {
    val wsClient: WSClient = ??? // 初始化WSClient
    val request: WSRequest = wsClient.url("https://api.example.com")
    val updatedRequest: WSRequest = request.withHttpHeaders(header)
    updatedRequest.get()
  }
}