Configure proxy to Jersey client

Question

I would like to configure a proxy server to my Jersey client.
I don't want to configure the proxy to the whole application (using JVM arguments such as http.proxyHost), and Id'e rather not use Apache client.
I read here that there is an option to do it by providing HttpUrlConnection via HttpUrlConnectionFactory, but I couldn't find any code example.
Does anyone know how can I do it?
Thanks!

Answer 1

Try

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

Answer 2

With the help of Luca, I got it done:

1. Implement HttpURLConnectionFactory, and override the method getHttpURLConnection, my implementation is (thanks to Luca):

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

2. Before instantiating the Jersey Client, create a new URLConnectionClientHandler, and provide your HttpURLConnectionFactory in its constructor. Then create a new Client, and provide your ClientHandler in the Client constructor. My code:

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

Hope that's help.

Answer 3

First of all I created this class

    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;
            }
        };
    }

}

then I also create another class called SecureTrustManager

    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;
    }

}

then after creation this class i'm calling the client like this

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

replace webProxy.getWeserviceHost by your proxyHost and webProxy.getWebserviceProxyPort() by the proxy port.

This worked for me and it should work also for you. Note that i'm using Jersey 1.8 but it should also work for Jersey 2