org.ulteo.utils.ProxyManager.java Source code

Introduction

Here is the source code for org.ulteo.utils.ProxyManager.java

Source

/*
 * Copyright (C) 2011 Ulteo SAS
 * http://www.ulteo.com
 * Author David LECHEVALIER <david@ulteo.com> 2011 
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; version 2
 * of the License.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package org.ulteo.utils;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.Socket;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;

import net.propero.rdp.RdesktopException;

import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.ProxyClient;
import org.apache.commons.httpclient.UsernamePasswordCredentials;
import org.apache.commons.httpclient.auth.AuthScope;

import org.ulteo.Logger;
import org.ulteo.ovd.client.profile.ProfileProperties;

public class ProxyManager {
    private String host = null;
    private int port = -1;
    private String login = null;
    private String password = null;
    private boolean useProxy = false;

    public ProxyManager() {
        this.host = System.getProperty("https.proxyHost");
        try {
            this.port = Integer.parseInt(System.getProperty("https.proxyPort"));
        } catch (NumberFormatException e) {
            this.port = -1;
        }
        this.useProxy = (this.host != null) && (this.port != -1);

        this.login = System.getProperty("https.proxyUsername");
        this.password = System.getProperty("https.proxyPassword");
    }

    public boolean available() {
        return this.useProxy;
    }

    public void detect(String remoteHost) {
        Logger.debug("Detect proxy");
        List<Proxy> proxyList = null;
        System.setProperty("java.net.useSystemProxies", "true");
        ProxySelector ps = ProxySelector.getDefault();

        if (ps == null) {
            Logger.warn("Unable to detect a proxy: no proxySelector available");
            return;
        }
        try {
            URI uri = new URI("https://" + remoteHost);
            proxyList = ps.select(uri);
        } catch (URISyntaxException e) {
            Logger.warn("Unable to detect a proxy: bad URL");
            return;
        }
        if (proxyList != null) {
            for (Proxy proxy : proxyList) {
                InetSocketAddress addr = (InetSocketAddress) proxy.address();
                if (addr != null) {
                    this.host = addr.getHostName();
                    this.port = addr.getPort();
                    System.setProperty("https.proxyHost", this.host);
                    System.setProperty("https.proxyPort", new Integer(this.port).toString());
                    Logger.debug("using proxy[" + this.host + ":" + this.port + "]");
                    break;
                }
            }
        }
    }

    public boolean updateProxy(ProfileProperties properties) {
        String proxyHost = properties.getProxyHost();
        String proxyPort = properties.getProxyPort();

        if (properties.getProxyUsername() != null) {
            this.login = properties.getProxyUsername();
            this.password = properties.getProxyPassword();
        }

        switch (properties.getProxyType()) {
        case auto:
            Logger.debug("Using auto proxy");
            this.detect(properties.getHost());
            break;

        case custom:
            Logger.debug("Using custom proxy");
            this.host = proxyHost;
            System.setProperty("https.proxyHost", proxyHost);
            try {
                this.port = new Integer(proxyPort);
                System.setProperty("https.proxyPort", proxyPort);
            } catch (NumberFormatException e) {
                Logger.warn("Invalid proxy port in the custom configuration");
                this.useProxy = false;
                this.host = null;
                this.port = -1;
                System.setProperty("https.proxyHost", "");
                System.setProperty("https.proxyPort", "");
            }
            break;

        case none:
            Logger.debug("No proxy used");
            this.host = null;
            this.port = -1;
            this.useProxy = false;
            System.setProperty("https.proxyHost", "");
            System.setProperty("https.proxyPort", "");
            break;
        }
        return true;
    }

    public Socket connect(String remoteHost, int remotePort) throws IOException, RdesktopException {
        ProxyClient proxyClient = new ProxyClient();

        Logger.debug("Connecting to proxy[" + this.host + ":" + this.port + "]");

        proxyClient.getHostConfiguration().setProxy(this.host, this.port);
        proxyClient.getHostConfiguration().setHost(remoteHost, remotePort);

        if (this.login != null && this.password != null) {
            Logger.debug("Use credentials");
            proxyClient.getState().setProxyCredentials(AuthScope.ANY,
                    new UsernamePasswordCredentials(this.login, this.password));
        }
        Logger.debug("Connected to proxy[" + this.host + ":" + this.port + "]");
        ProxyClient.ConnectResponse resp = proxyClient.connect();

        if (resp.getConnectMethod().getStatusCode() != HttpStatus.SC_OK) {
            Logger.debug("Failed to connect to proxy[" + this.host + ":" + this.port + "]"
                    + resp.getConnectMethod().getStatusLine());
            return null;
        }
        Logger.debug("Proxy OK");
        return resp.getSocket();
    }
}