为什么dispatch抛出“java.net.ConnectException：General SSLEngine ...”。和“意外状态”特定网址的例外情况？ [英] Why does dispatch throw "java.net.ConnectException: General SSLEngine ..." and "unexpected status" exceptions for a particular URL?

问题描述

我有以下非工作代码：

object Main extends App {
  import dispatch._

  def test(address: String) = {
    Await.result(Http.default(url(address).GET OK as.String), Duration.Inf)
  }

  // This works fine
  val s1 = test("http://download.finance.yahoo.com/d/quotes.csv?s=MSFT&f=sohgbav")
  println(s1)

  // This throws Exception 1
  val s2 = test("http://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&apikey=demo&datatype=csv")
  println(s2) 

  // This throws Exception 2
  val s3 = test("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&apikey=demo&datatype=csv")
  println(s3) 
}

我想知道为什么s1工作正常，而s2和s3抛出异常。抛出的例外是：

I would like to know why "s1" works fine, whereas "s2" and "s3" throw exceptions. The exceptions thrown are:

例外1：

[error]   ! access URL
[error]    java.util.concurrent.ExecutionException: dispatch.StatusCode: Unexpected response status: 301 (NettyResponseFuture.java:172)
[error] org.asynchttpclient.netty.NettyResponseFuture.get(NettyResponseFuture.java:172)
[error] dispatch.HttpExecutor.$anonfun$apply$3(execution.scala:123) 

例外2：

[error]   ! access URL
[error]    java.util.concurrent.ExecutionException: java.net.ConnectException: General SSLEngine problem (NettyResponseFuture.java:172)
[error] org.asynchttpclient.netty.NettyResponseFuture.get(NettyResponseFuture.java:172)
[error] dispatch.HttpExecutor.$anonfun$apply$3(execution.scala:123)

此外，当我通过Safari Web浏览器访问它们时，所有三个URL都按预期工作。为什么第一个URL通过调度工作正常，但最后两个没有？

Also, all three URLs work as expected when I access them through the Safari web browser. Why does the first URL work fine through dispatch, but the last two don't?

推荐答案

如果你想信任所有证书，如在链接的Play示例中，然后尝试：

If you want to trust all certificates, as in the linked Play example, then try this:

Http.withConfiguration(config => config.setAcceptAnyCertificate(true))(url(address).GET OK as.String)

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