如何在不设置系统范围属性的情况下对 JAX-WS 请求使用 HTTP 代理?

2022-09-01 05:29:00

我有一个应用程序需要向Internet上的系统发出SOAP客户端请求,因此它需要通过我们的HTTP代理。

可以通过设置系统范围的值(如系统属性)来执行此操作:

// Cowboy-style.  Blow away anything any other part of the application has set.
System.getProperties().put("proxySet", "true");
System.getProperties().put("https.proxyHost", HTTPS_PROXY_HOST);  
System.getProperties().put("https.proxyPort", HTTPS_PROXY_PORT);

或者通过设置默认的 ProxySelector(也是系统范围的设置):

// More Cowboy-style!  Every thing Google has found says to do it this way!?!?!
ProxySelector.setDefault(new MyProxySelector(HTTPS_PROXY_HOST, HTTPS_PROXY_PORT));

如果其他子系统可能希望通过不同的HTTP代理或没有任何代理来访问Web服务器,那么这两者都不是明智的选择。使用可以让我配置哪些连接使用代理,但是我必须为大型应用程序中的每一件事弄清楚这一点。ProxySelector

一个合理的API将有一个方法,就像构造函数一样获取对象。这样,必要的设置就位于需要设置它们的系统的一部分的本地。有没有办法用JAX-WS做到这一点?java.net.Proxyjava.net.Socket(java.net.Proxy proxy)

我不想设置系统范围的代理配置。


答案 1

我建议使用自定义 ProxySelector。我有同样的问题,它工作得很好,非常灵活。这也很简单。

这是我的CustomProxySelector:

import org.hibernate.validator.util.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

/**
 * So the way a ProxySelector works is that for all Connections made,
 * it delegates to a proxySelector(There is a default we're going to
 * override with this class) to know if it needs to use a proxy
 * for the connection.
 * <p>This class was specifically created with the intent to proxy connections
 * going to the allegiance soap service.</p>
 *
 * @author Nate
 */
class CustomProxySelector extends ProxySelector {

    private final ProxySelector def;

    private Proxy proxy;

    private static final Logger logger = Logger.getLogger(CustomProxySelector.class.getName());

    private List<Proxy> proxyList = new ArrayList<Proxy>();

    /*
     * We want to hang onto the default and delegate
     * everything to it unless it's one of the url's
     * we need proxied.
     */
    CustomProxySelector(String proxyHost, String proxyPort) {
        this.def = ProxySelector.getDefault();
        proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, (null == proxyPort) ? 80 : Integer.valueOf(proxyPort)));
        proxyList.add(proxy);
        ProxySelector.setDefault(this);
    }

    @Override
    public List<Proxy> select(URI uri) {
        logger.info("Trying to reach URL : " + uri);
        if (uri == null) {
            throw new IllegalArgumentException("URI can't be null.");
        }
        if (uri.getHost().contains("allegiancetech")) {
            logger.info("We're trying to reach allegiance so we're going to use the extProxy.");
            return proxyList;
        }
        return def.select(uri);
    }

    /*
    * Method called by the handlers when it failed to connect
    * to one of the proxies returned by select().
    */
    @Override
    public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
        logger.severe("Failed to connect to a proxy when connecting to " + uri.getHost());
        if (uri == null || sa == null || ioe == null) {
            throw new IllegalArgumentException("Arguments can't be null.");
        }
        def.connectFailed(uri, sa, ioe);
    }
}

答案 2

如果您使用的是 JAX-WS,那么也许能够设置底层 HttpURLConnection 使用的套接字工厂。我看到模糊的迹象表明这对于SSL是可能的(参见HTTPS SSLSocketFactory),但我不确定你是否可以为常规HTTP连接做到这一点(或者坦率地说,它是如何工作的:他们引用的JAXWSProperties类似乎是一个非标准的JDK类)。

如果可以设置套接字工厂,则可以配置使用所需特定代理的自定义套接字工厂。


推荐