java 使用 JAX-WS：如何设置用户代理属性
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Using JAX-WS: How can I set the user agent property
提问by soulTower
I've searched on this and found a few near misses. I've created a java client to consume a web service using JAX-WS. Is there a way when using JAX to set the HTTP_USER_AGENT value? I would like to have my web service log when specific clients (mine) access it so I wanted a customized value.
我对此进行了搜索，发现了一些未遂事件。我已经创建了一个 Java 客户端来使用 JAX-WS 来使用 Web 服务。使用 JAX 设置 HTTP_USER_AGENT 值时有没有办法？当特定客户端（我的）访问它时，我希望拥有我的 Web 服务日志，因此我想要一个自定义值。
I've seen options where you set it in the system properties but this doesn't seem to work. The generated JAX classes don't seem to have a direct reference to the connection object so I don't see how I can manipulate those classes.
我已经看到您在系统属性中设置它的选项，但这似乎不起作用。生成的 JAX 类似乎没有对连接对象的直接引用，所以我看不到如何操作这些类。
Any help would be great. Thanks ST
任何帮助都会很棒。谢谢 ST
回答by dertoni
The solution to this kind of problem in JAX-WS is to implement a SoapMessage Handler (Interface: SOAPHandler< SOAPMessageContext >). Within that handler you insert your HTTP header into maybe already existing headers, then you give control to the next handler in the handler chain.
在 JAX-WS 中解决这类问题的方法是实现一个 SoapMessage Handler（接口：SOAPHandler<SOAPMessageContext>）。在该处理程序中，您将 HTTP 标头插入可能已经存在的标头中，然后将控制权交给处理程序链中的下一个处理程序。
The concept of this handler chain is kind of nice, you can have small classes for a very specific purpose (Security, Logging etc.).
这个处理程序链的概念很好，您可以为非常特定的目的（安全、日志记录等）创建小类。
In your client you configure the handler chain prior to sending any request:
在您的客户端中，您在发送任何请求之前配置处理程序链：
// HandlerChain installieren
Binding binding = ((BindingProvider) port).getBinding();
List hchain = binding.getHandlerChain();
if (hchain == null) {
hchain = new ArrayList();
}
hchain.add(new HTTPUserAgentHandler());
binding.setHandlerChain(hchain);
And here is the code for the HTTPUserAgentHandler:
这是 HTTPUserAgentHandler 的代码：
public class HTTPUserAgentHandler implements SOAPHandler<SOAPMessageContext> {
@Override
public boolean handleMessage(SOAPMessageContext context) {
boolean request = ((Boolean) context.get(SOAPMessageContext.MESSAGE_OUTBOUND_PROPERTY)).booleanValue();
if (request) {
@SuppressWarnings("unchecked")
Map<String, List<String>> headers = (Map<String, List<String>>) context
.get(MessageContext.HTTP_REQUEST_HEADERS);
if (null == headers) {
headers = new HashMap<String, List<String>>();
}
headers.put("HTTP_USER_AGENT", Collections.singletonList("user_agent"));
context.put(MessageContext.HTTP_REQUEST_HEADERS, headers);
}
return true;
}
@Override
public boolean handleFault(SOAPMessageContext context) {
return true;
}
@Override
public void close(MessageContext context) {}
@Override
public Set<QName> getHeaders() {
return null;
}
}
回答by jtahlborn
not sure if this is the best/most direct way to do it, but i think you could add a custom javax.xml.ws.handler.Handler to the handler chain in the dispatch javax.xml.ws.Binding. in the Handler, you should be able to set a custom map of extra http headers on the outgoing MessageContext using the MessageContext.HTTP_REQUEST_HEADERS property.
不确定这是否是最好/最直接的方法，但我认为您可以将自定义 javax.xml.ws.handler.Handler 添加到调度 javax.xml.ws.Binding 中的处理程序链中。在处理程序中，您应该能够使用 MessageContext.HTTP_REQUEST_HEADERS 属性在传出的 MessageContext 上设置额外 http 标头的自定义映射。
回答by Vladimir Dyuzhev
Let me question the idea of having HTTP header first.
让我质疑首先拥有 HTTP 标头的想法。
A more correct (WS-centric) approach is to set SOAP Header, not HTTP header. Consider this: SOAP messages can be delivered not only by HTTP, but by JMS, SMTP or custom transports. By requiring to have user-agent HTTP Header, you unnecessary tie you code to only one transport, albeit currently prevailing.
更正确（以 WS 为中心）的方法是设置 SOAP 标头，而不是 HTTP 标头。考虑一下：SOAP 消息不仅可以通过 HTTP 传递，还可以通过 JMS、SMTP 或自定义传输传递。通过要求拥有用户代理 HTTP 标头，您不必将代码绑定到一种传输方式，尽管目前普遍存在。
This is the reason BTW why JAX-WS have no notion of HTTP headers except in handlers.
这就是为什么 JAX-WS 除了处理程序之外没有 HTTP 标头概念的原因。
And (of course) StackOverlow knowshow to create SOAP headers.
而且（当然）StackOverlow知道如何创建 SOAP 标头。
