be.fedict.eid.dss.client.DSSProxySelector.java Source code

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Here is the source code for be.fedict.eid.dss.client.DSSProxySelector.java

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/*
 * eID Digital Signature Service Project.
 * Copyright (C) 2009-2010 FedICT.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, see 
 * http://www.gnu.org/licenses/.
 */

package be.fedict.eid.dss.client;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.MalformedURLException;
import java.net.Proxy;
import java.net.Proxy.Type;
import java.net.ProxySelector;
import java.net.SocketAddress;
import java.net.URI;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * HTTP/HTTPS proxy selector for the eID DSS web service client.
 * 
 * @author Frank Cornelis
 * 
 */
public class DSSProxySelector extends ProxySelector {

    private static final Log LOG = LogFactory.getLog(DSSProxySelector.class);

    private final ProxySelector defaultProxySelector;

    private final Map<String, Proxy> proxies;

    /**
     * Main constructor.
     * 
     * @param proxySelector
     *            the default proxy selector.
     */
    public DSSProxySelector(ProxySelector proxySelector) {
        this.defaultProxySelector = proxySelector;
        this.proxies = new HashMap<String, Proxy>();
    }

    @Override
    public List<Proxy> select(URI uri) {
        LOG.debug("select: " + uri);
        String hostname = uri.getHost();
        Proxy proxy = this.proxies.get(hostname);
        if (null != proxy) {
            LOG.debug("using proxy: " + proxy);
            return Collections.singletonList(proxy);
        }
        return this.defaultProxySelector.select(uri);
    }

    @Override
    public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
        this.defaultProxySelector.connectFailed(uri, sa, ioe);
    }

    /**
     * Sets the proxy for a certain location URL. If the proxyHost is
     * <code>null</code, we go DIRECT.
     * 
     * @param location
     *            the location to proxy.
     * @param proxyHost
     *            proxy hostname
     * @param proxyPort
     *            proxy port
     */
    public void setProxy(String location, String proxyHost, int proxyPort) {
        String hostname;
        try {
            hostname = new URL(location).getHost();
        } catch (MalformedURLException e) {
            throw new RuntimeException("URL error: " + e.getMessage(), e);
        }
        if (null == proxyHost) {
            LOG.debug("removing proxy for: " + hostname);
            this.proxies.remove(hostname);
        } else {
            LOG.debug("setting proxy for: " + hostname);
            this.proxies.put(hostname, new Proxy(Type.HTTP, new InetSocketAddress(proxyHost, proxyPort)));
        }
    }
}