为 Jersey 客户端配置代理

Question

我想为我的 Jersey 客户端配置一个代理服务器。
我不想为整个应用程序配置代理（使用 JVM 参数，例如 http.proxyHost），我宁愿不使用 Apache 客户端。
我读到here 有一个选项可以通过提供 HttpUrlConnection 通过 HttpUrlConnectionFactory，但我找不到任何代码示例。
有谁知道我该怎么做？
谢谢！

Answer 1

在卢卡的帮助下，我完成了：

1. 实现HttpURLConnectionFactory，并覆盖方法getHttpURLConnection，我的实现是（感谢Luca）：

   Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("127.0.0.1", 3128));
   return new HttpURLConnection(url, proxy);
   

2. 在实例化 Jersey 客户端之前，创建一个新的 URLConnectionClientHandler，并在其构造函数中提供您的 HttpURLConnectionFactory。然后创建一个新的Client，并在Client 构造函数中提供您的ClientHandler。我的代码：

   URLConnectionClientHandler urlConnectionClientHandler = new URLConnectionClientHandler(new MyHttpURLConnectionFactory());
   _client = new Client(urlConnectionClientHandler);
   

希望对您有所帮助。

Answer 2

首先我创建了这个类

    import com.sun.jersey.client.urlconnection.HttpURLConnectionFactory;
    import java.io.IOException;
    import java.net.HttpURLConnection;
    import java.net.InetSocketAddress;
    import java.net.Proxy;
    import java.net.URL;
    import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;

/**
 *
 * @author Aimable
 */
public class ConnectionFactory implements HttpURLConnectionFactory {

    Proxy proxy;

    String proxyHost;

    Integer proxyPort;

    SSLContext sslContext;

    public ConnectionFactory() {
    }

    public ConnectionFactory(String proxyHost, Integer proxyPort) {
        this.proxyHost = proxyHost;
        this.proxyPort = proxyPort;
    }

    private void initializeProxy() {
        proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, proxyPort));
    }

    @Override
    public HttpURLConnection getHttpURLConnection(URL url) throws IOException {
        initializeProxy();
        HttpURLConnection con = (HttpURLConnection) url.openConnection(proxy);
        if (con instanceof HttpsURLConnection) {
            System.out.println("The valus is....");
            HttpsURLConnection httpsCon = (HttpsURLConnection) url.openConnection(proxy);
            httpsCon.setHostnameVerifier(getHostnameVerifier());
            httpsCon.setSSLSocketFactory(getSslContext().getSocketFactory());
            return httpsCon;
        } else {
            return con;
        }

    }

    public SSLContext getSslContext() {
        try {
            sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, new TrustManager[]{new SecureTrustManager()}, new SecureRandom());
        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(ConnectionFactory.class.getName()).log(Level.SEVERE, null, ex);
        } catch (KeyManagementException ex) {
            Logger.getLogger(ConnectionFactory.class.getName()).log(Level.SEVERE, null, ex);
        }
        return sslContext;
    }

    private HostnameVerifier getHostnameVerifier() {
        return new HostnameVerifier() {
            @Override
            public boolean verify(String hostname,
                    javax.net.ssl.SSLSession sslSession) {
                return true;
            }
        };
    }

}

然后我还创建了另一个名为 SecureTrustManager 的类

    import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.X509TrustManager;

/**
 *
 * @author Aimable
 */
public class SecureTrustManager implements X509TrustManager {

    @Override
    public void checkClientTrusted(X509Certificate[] arg0, String arg1)
            throws CertificateException {
    }

    @Override
    public void checkServerTrusted(X509Certificate[] arg0, String arg1)
            throws CertificateException {
    }

    @Override
    public X509Certificate[] getAcceptedIssuers() {
        return new X509Certificate[0];
    }

    public boolean isClientTrusted(X509Certificate[] arg0) {
        return true;
    }

    public boolean isServerTrusted(X509Certificate[] arg0) {
        return true;
    }

}

然后在创建这个类之后，我像这样调用客户端

URLConnectionClientHandler cc = new URLConnectionClientHandler(new ConnectionFactory(webProxy.getWebserviceProxyHost(), webProxy.getWebserviceProxyPort()));
    client = new Client(cc);
    client.setConnectTimeout(2000000);

将 webProxy.getWeserviceHost 替换为您的 proxyHost，将 webProxy.getWebserviceProxyPort() 替换为代理端口。

这对我有用，它也应该对你有用。请注意，我使用的是 Jersey 1.8，但它也应该适用于 Jersey 2

Answer 3

试试

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(host, port));
conn = new URL(url).openConnection(proxy);