CXF Soap 客户端首次连接失败 运行

Question

当我创建一个 cxf 客户端来调用 SOAP Web 服务时，它 returns connection refused 或 Unexpected end of file from server。问题是，它只是在第一次请求时发生，之后它就像客户端 "warmed up" 并且实际开始工作。

知道为什么会这样吗？

...
if(port == null) {
  JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean();
  factory.getInInterceptors().add(new LoggingInInterceptor());
  factory.getOutInterceptors().add(new LoggingOutInterceptor());
  factory.setAddress("http://localhost:9000/helloWorld");
  port = factory.create(HelloWorld.class);

  ... 
  Client client= ClientProxy.getClient(port);
  HTTPConduit http = (HTTPConduit) client.getConduit();
  HTTPClientPolicy httpClientPolicy = new HTTPClientPolicy();
  httpClientPolicy.setAllowChunking(false);
  http.setClient(httpClientPolicy);
}

port.someMethod();  // fails on first run, but succeeds on all following runs
...

删除 if 语句会导致客户端在每次调用时都失败，而不仅仅是第一次。我真的被困住了，非常感谢任何帮助。

Answer 1

这个问题似乎是由 TLS 1.2 引起的。在 Java8 中，default TLS version changed 从 TLSv1 到 TLSv1.2。即使使用最新版本的 CXF (3.1.7)，TLS 1.2 似乎也不起作用。所以解决方案是设置用于 CXF 的 TLS 版本：

...
HTTPClientPolicy httpClientPolicy = new HTTPClientPolicy();
httpClientPolicy.setAllowChunking(false);
httpClientPolicy.setAutoRedirect(true);
httpClientPolicy.setConnection(ConnectionType.KEEP_ALIVE);

String proxyUrl = "http://proxy.com";
String proxyPortString = "8080";
HTTPConduit http = (HTTPConduit)client.getConduit();
SSLContext sslContext = SSLContext.getInstance("TLSv1");
sslContext.init(null, null, null);
HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
TLSClientParameters tlsClientParameters = new TLSClientParameters();
tlsClientParameters.setUseHttpsURLConnectionDefaultSslSocketFactory(true);

http.setTlsClientParameters(tlsClientParameters);
http.setClient(httpClientPolicy);