Question

我是Spray的新手并尝试实现从服务器接收数据流的客户端。我当前的代码如下所示。客户端向HTTP服务器发送请求，然后HTTP服务器响应数据流（作为分块响应）。我检查它是否连接到服务器并可以得到响应。

但是，我不清楚我应该如何处理断开连接和重新连接。例如，（A）如果我丢失网络连接或（B）我的客户端超时，因为服务器当时可能没有任何数据要发送。任何指针/示例将不胜感激。

更新

首先，我想检测上面的事件（A）和（B）。当客户端遇到上述（A）或（B）时，它应该重新建立连接并重新进行身份验证，以便它可以继续（返回connected状态以获取数据流。

import spray.http._
import spray.client.pipelining._
import akka.actor._
import spray.can.Http
import akka.io.IO
import spray.http.HttpRequest
import spray.http.ChunkedResponseStart
import spray.http.HttpRequest
import spray.http.ChunkedResponseStart

trait Authorization {
  def authorize: HttpRequest => HttpRequest
}

trait OAuthAuthorization extends Authorization {

  import OAuth._

  val consumer = ???
  val token = ???
  val authorize: (HttpRequest) => HttpRequest = OAuthorizer(token, token)
}


class StreamerActor(uri: Uri) extends Actor with ActorLogging {
  this: Authorization =>
  val io = IO(Http)(context.system)

  //Initial state of the Actor
  def receive = ready

  def ready: Receive = {
    case query: String =>
      val body = HttpEntity(ContentType(MediaTypes.`application/x-www-form-urlencoded`), s"$query")
      val req = HttpRequest(HttpMethods.POST, uri = uri, entity = body) ~> authorize
      sendTo(io).withResponsesReceivedBy(self)(req)
      //As soon as you get the data you should change state to "connected" by using a "become"
      context become connected
  }

  def connected: Receive = {
    case ChunkedResponseStart(_) => log.info("Chunked Response started.")
    case MessageChunk(entity, _) => log.info(entity.asString)
    case ChunkedMessageEnd(_, _) => log.info("Chunked Message Ended")
    case Http.Closed => log.info("HTTP closed")
    case _ =>
  }
}

object SprayStreamer extends App {

  val system = ActorSystem("simple-spray-http")
  val Uri = Uri("https://.....")
  val streamClient = system.actorOf(Props(new StreamerActor(Uri) with OAuthAuthorization), name = "spray-client")
  streamClient ! "keyword"

}

这些是我resources/application.conf

的内容

spray {
  can.server {
    idle-timeout = 90 s
    request-timeout = 80 s
    connection-timeout = 90 s
    reqiest-chunk-aggregation-limit = 0
  }

  can.client {
    idle-timeout = 90 s
    request-timeout = 80 s
    connection-timeout = 90 s
    response-chunk-aggregation-limit = 0
  }

  io.confirm-sends = on

}

使用Chunked Response处理Spray和自定义actor中的断开连接和重新连接

0 个答案: