试图使用spring-ws-“连接超时”访问WS服务器，但服务器在使用SOAP UI测试时会响应

Question

我将接管java web服务客户机的开发工作，为了测试一个演化，我必须从远程web服务服务器（嵌入在tomcat实例中运行的Apache Axis2中）请求一个方法。

首先，我使用服务器提供的WSDL通过SOAP UI请求该方法。很好用。

现在我尝试通过我的Java web服务客户机请求该方法，但是我无法连接到服务器，尽管使用SOAP UI的测试证明它一切正常。

java web服务客户机依赖于Spring-WS。

// Setting the kycScoreRequest
...

// Trying to connect and to get the kycScoreResponse 
KycScoreResponse kycScoreResponse = (KycScoreResponse) getWebServiceTemplate().marshalSendAndReceive(kycScoreRequest);

[main] DEBUG com.foo.AbstractMain - org.springframework.ws.client.WebServiceIOException: I/O error: Connection timed out: connect; nested exception is java.net.ConnectException: Connection timed out: connect
    at org.springframework.ws.client.core.WebServiceTemplate.sendAndReceive(WebServiceTemplate.java:545)
    at org.springframework.ws.client.core.WebServiceTemplate.marshalSendAndReceive(WebServiceTemplate.java:386)
    at org.springframework.ws.client.core.WebServiceTemplate.marshalSendAndReceive(WebServiceTemplate.java:380)
    at org.springframework.ws.client.core.WebServiceTemplate.marshalSendAndReceive(WebServiceTemplate.java:372)
    at com.foo.MainKycScore.getReturn(MainKycScore.java:37)
    at com.foo.MainKycScore.main(MainKycScore.java:244)
Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:326)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445)
    at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
    at org.springframework.ws.transport.http.HttpComponentsConnection.onSendAfterWrite(HttpComponentsConnection.java:119)
    at org.springframework.ws.transport.AbstractWebServiceConnection.send(AbstractWebServiceConnection.java:47)
    at org.springframework.ws.client.core.WebServiceTemplate.sendRequest(WebServiceTemplate.java:624)
    at org.springframework.ws.client.core.WebServiceTemplate.doSendAndReceive(WebServiceTemplate.java:587)
    at org.springframework.ws.client.core.WebServiceTemplate.sendAndReceive(WebServiceTemplate.java:539)
    ... 5 more

WebServiceGatewaySupport.setDefaultUri("http://82.36.138.182:8080/axis2/services/KYCService01.KYCService01HttpSoap11Endpoint/")

<wsdl:service name="KYCService01">
    <wsdl:port name="KYCService01HttpSoap11Endpoint" binding="ns:KYCService01Soap11Binding">
        <soap:address location="http://82.36.138.182:8080/axis2/services/KYCService01.KYCService01HttpSoap11Endpoint/"/>
    </wsdl:port>
</wsdl:service>

WebServiceGatewaySupport.setDefaultUri("http://82.36.138.182:8080/axis2/services/KYCService01")

System.setProperty("http.proxyHost", "<my_proxy_hostname>");
System.setProperty("http.proxyPort", "<my_proxy_port>");

URL wsdlAddress = null;
HttpURLConnection connection = null;

wsdlAdress = new URL("<wsdl_url>");
connection = (HttpURLConnection) wsdlAdress.openConnection();
connection.connect(); // It works if the proxy is set as System properties

不幸的是，当我试图用我的代理集调用web服务服务器时，我仍然会遇到与上面提到的完全相同的错误。现在我已经不知道了。我的Java客户机怎么可能访问web服务WSDL而不能访问它的方法呢？

多亏了膜拦截器，我从SOAP UI和WS客户端拦截了HTTP消息。请参阅标题：

SOAP UI

POST http://82.36.138.182:8080/axis2/services/KYCService01.KYCService01HttpSoap11Endpoint/ HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: text/xml;charset=UTF-8
SOAPAction: "urn:kycScore"
Content-Length: 1301
Host: 84.37.138.182:8080
Proxy-Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1.1 (java 1.5)

WS客户机（目标URL是一个SOAP UI模拟服务器，因为很明显，如果我使用URL，我真的试图连接到没有发送任何东西，因此没有什么要拦截的东西）

POST /mock HTTP/1.1
Accept-Encoding: gzip
Accept: text/xml, text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
SOAPAction: ""
Content-Type: text/xml; charset=utf-8
Content-Length: 1032
Host: localhost:8088
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.5.3 (Java/1.8.0_101)

我对http头一无所知，但主要区别似乎是SOAPAction。我将ws客户端消息的SOAPAction属性设置为与SOAP UI相同的值，但没有改变任何内容。

public Object marshalWithSoapActionHeader(KycScore o) {

        return getWebServiceTemplate().marshalSendAndReceive(o, new WebServiceMessageCallback() {

            public void doWithMessage(WebServiceMessage message) {
                ((SoapMessage) message).setSoapAction("urn:kycScore");
            }
        });
    }

Answer 1

总结疑难解答提示，以尝试在注释中总结冗长的讨论：

1. 尝试检查是否缺少任何必需的标头。
2. 尝试访问服务的简单连接运行状况检查或pingendpoint。
3. 如果一直出现连接超时，请尝试缩短连接超时。
4. 如果无法连接，请检查防火墙规则。
5. 使用内部开发的自定义客户端库时，请向了解该库的开发人员寻求帮助。
6. 使用自定义客户端库时，将源附加到调试。
7. 尝试复制一个模板，比如MyKong的SOAP Web服务示例，如果可以的话。