如何解决无法下载用于 Streams 的 Play 迁移的依赖项 (Scala/sbt)
我们将旧系统升级到新版本的 Play（Scala 2.12.8 -> 2.13.5，Play 2.6 -> 2.8） 现在我有了这行代码：
Ok.chunked(Source.fromPublisher(IterateeStreams.enumeratorToPublisher(MyEnumerator))).withHeaders(...)
在新项目中似乎缺少 IterateeStreams，但是当我尝试添加依赖项时
libraryDependencies += ....
"com.typesafe.play" %% "play-iteratees" % "2.6.1"
"com.typesafe.play" %% "play-iteratees-reactive-streams" % "2.6.1"
下载失败。我还尝试了 https://www.playframework.com/documentation/2.8.x/StreamsMigration25
中描述的 akka Streams但是 IntelliJ 也不知道“Stream”类。 （在类中导入 akka._）。 我试过玩依赖和其他东西，但似乎我做不到，现在我很困惑。
我对 Scala/Play 还是很陌生（两周前开始），所以我可能只是在这里犯了一些新手错误......
错误：
$ compile
[info] Updating
[info] Resolved dependencies
[warn]
[warn] Note: Unresolved dependencies path:
[error] stack trace is suppressed; run last update for the full output
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.play:play-iteratees-reactive-streams_2.13:2.6.1
[error] Not found
[error] Not found
[error] not found: /home/******/.ivy2/local/com.typesafe.play/play-iteratees-reactive-streams_2.13/2.6.1/ivys/ivy.xml
[error] not found: https://repo1.maven.org/maven2/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] not found: https://dl.bintray.com/scalaz/releases/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] not found: https://repo.akka.io/snapshots/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] Total time: 4 s,completed 26.04.2021,12:40:02
[myProject] $ last update
[debug] "not up to date. inChanged = true,force = false
[debug] Updating ...
[info] Updating
[info] Resolved dependencies
[warn]
[warn] Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading com.typesafe.play:play-iteratees-reactive-streams_2.13:2.6.1
[error] Not found
[error] Not found
[error] not found: /home/*******/.ivy2/local/com.typesafe.play/play-iteratees-reactive-streams_2.13/2.6.1/ivys/ivy.xml
[error] not found: https://repo1.maven.org/maven2/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] not found: https://dl.bintray.com/scalaz/releases/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] not found: https://repo.akka.io/snapshots/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] at lmcoursier.CoursierDependencyResolution.unresolvedWarningOrThrow(CoursierDependencyResolution.scala:247)
[error] at lmcoursier.CoursierDependencyResolution.$anonfun$update$35(CoursierDependencyResolution.scala:216)
[error] at scala.util.Either$LeftProjection.map(Either.scala:573)
[error] at lmcoursier.CoursierDependencyResolution.update(CoursierDependencyResolution.scala:216)
[error] at sbt.librarymanagement.DependencyResolution.update(DependencyResolution.scala:60)
[error] at sbt.internal.LibraryManagement$.resolve$1(LibraryManagement.scala:52)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$12(LibraryManagement.scala:102)
[error] at sbt.util.Tracked$.$anonfun$lastOutput$1(Tracked.scala:69)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$20(LibraryManagement.scala:115)
[error] at scala.util.control.Exception$Catch.apply(Exception.scala:228)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11(LibraryManagement.scala:115)
[error] at sbt.internal.LibraryManagement$.$anonfun$cachedUpdate$11$adapted(LibraryManagement.scala:96)
[error] at sbt.util.Tracked$.$anonfun$inputChanged$1(Tracked.scala:150)
[error] at sbt.internal.LibraryManagement$.cachedUpdate(LibraryManagement.scala:129)
[error] at sbt.Classpaths$.$anonfun$updateTask0$5(Defaults.scala:2950)
[error] at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:62)
[error] at sbt.std.Transform$$anon$4.work(Transform.scala:67)
[error] at sbt.Execute.$anonfun$submit$2(Execute.scala:281)
[error] at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:19)
[error] at sbt.Execute.work(Execute.scala:290)
[error] at sbt.Execute.$anonfun$submit$1(Execute.scala:281)
[error] at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:178)
[error] at sbt.CompletionService$$anon$2.call(CompletionService.scala:37)
[error] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
[error] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
[error] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
[error] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
[error] at java.base/java.lang.Thread.run(Thread.java:834)
[error] (update) sbt.librarymanagement.ResolveException: Error downloading com.typesafe.play:play-iteratees-reactive-streams_2.13:2.6.1
[error] Not found
[error] Not found
[error] not found: /home/******/.ivy2/local/com.typesafe.play/play-iteratees-reactive-streams_2.13/2.6.1/ivys/ivy.xml
[error] not found: https://repo1.maven.org/maven2/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] not found: https://dl.bintray.com/scalaz/releases/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
[error] not found: https://repo.akka.io/snapshots/com/typesafe/play/play-iteratees-reactive-streams_2.13/2.6.1/play-iteratees-reactive-streams_2.13-2.6.1.pom
看起来它首先尝试默认解析器，然后是自定义解析器。但据我所知，默认的应该可以工作。
顺便说一句：在旧项目中以相同的方式使用了相同的依赖项。
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