我正在尝试编写一个Akka HTTP微服务(akka版本2.4.11,Scala版本2.11.8,这两个版本在撰写时都是最新版本),它们知道客户端服务的IP(即远程地址) ),我无法让它发挥作用。
我可以创建并运行一个服务,上面写着“你好!'使用这样的路线:
val routeHello: Route = path("SayHello") {
get {
entity(as[String]) {
body => complete {
HttpResponse(entity = HttpEntity("Hello!"))
}
}
}
}
我构建了一个与上面相似的路由,这个路由被扩展,以便它知道客户端的IP地址。
我注意到我需要编辑application.conf文件并设置' remote-address-header = on'允许添加保存客户端(远程)IP地址的Remote-Address
标头。如果需要,我已经这样做了。
这是路线:
val routeHelloIp: Route = path("SayHelloIp") {
get {
// extractClientIp appears to be working as a filter
// instead of an extractor - why?
extractClientIp {
clientIp => {
entity(as[String]) {
body => complete {
HttpResponse(entity = HttpEntity("Hello!"))
}
}
}
}
}
}
然而,当我运行此路线时,我收到一条消息'无法找到所请求的资源。'。
在上面的示例中,看起来我的Akka-http DSL语法糖错了。如果你能把我放在正确的道路上,我将不胜感激!
编辑:
我已经尝试了以下程序来回应Ramon的有用答案。不幸的是它没有编译,我无法看到我需要做什么才能使它编译。</ p>
import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.Http.IncomingConnection
import java.net.InetSocketAddress
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.Sink
import akka.http.scaladsl.server.Directives._
import java.net.InetSocketAddress
object TestHttp {
def main(args: Array[String]) {
implicit val system = ActorSystem("my-system")
implicit val materializer = ActorMaterializer()
// allow connections from any IP
val interface = "0.0.0.0"
//from the question
def createRoute(address: InetSocketAddress) = path("SayHelloIp") {
get {
extractRequestEntity { entity =>
entity(as[String]) { body =>
complete(entity = s"Hello ${address.getAddress().getHostAddress()}")
}
}
}
}
Http().bind(interface).runWith(Sink foreach { conn =>
val address = conn.remoteAddress
conn.handleWithAsyncHandler(createRoute(address))
})
}
}
我有以下build.sbt以确保使用最新版本的Scala和akka-http:
import sbt.Keys._
name := "Find my IP"
version := "1.0"
scalaVersion := "2.11.8"
resolvers ++= Seq(
"Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"
)
libraryDependencies ++= {
Seq(
"com.typesafe.akka" %% "akka-actor" % "2.4.11",
"com.typesafe.akka" %% "akka-stream" % "2.4.11",
"com.typesafe.akka" %% "akka-http-experimental" % "2.4.11",
"com.typesafe.akka" %% "akka-http-core" % "2.4.11"
)
}
我收到以下编译时错误:
[error] /Users/tilopa/temp/akka-test/src/main/scala/Test.scala:24: akka.http.scaladsl.model.RequestEntity does not take parameters
[error] entity(as[String]) { body =>
[error] ^
[error] /Users/tilopa/temp/akka-test/src/main/scala/Test.scala:25: reassignment to val
[error] complete(entity = s"Hello ${address.getAddress().getHostAddress()}")
[error] ^
[error] two errors found
[error] (compile:compileIncremental) Compilation failed
答案 0 :(得分:7)
使用extractClientIp
extractClientIp
不适合您,因为发件人未指定其中一个必需的标头字段。来自documentation:
提供X-Forwarded-For,Remote-Address或X-Real-IP的值 标头作为RemoteAddress的一个实例。
您只需在发件人中启用正确的设置:
akka-http服务器引擎将Remote-Address标头添加到每个 如果相应的设置,请自动请求 akka.http.server.remote-address-header设置为on。默认情况下是 设置为关闭。
通用解决方案
如果您希望这适用于任何HttpRequest,而不仅仅是具有正确标头设置的HttpRequest,那么您必须在HttpExt
上使用bind
方法而不是bindAndHandle
:
import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.Http.IncomingConnection
import java.net.InetSocketAddress
implicit val actorSystem : ActorSystem = ???
implicit val actorMat = ActorMaterializer()
//alow connections from any IP
val interface = "0.0.0.0"
//from the question
def createRoute(address : InetSocketAddress) = path("SayHelloIp") {
get {
extractRequestEntity { entity =>
entity(as[String]) { body =>
complete(entity = s"Hello ${address.getAddress().getHostAddress()}")
}
}
}
}
Http().bind(interface).runWith(Sink foreach { conn =>
val address = conn.remoteAddress
conn.handleWithAsyncHandler(createRoute(address))
})
修改强>
正如评论中所述:由于akka 10.0.13
使用conn.handleWith
。