Helper.java

/*
 * This file is part of ZSE Info.
 *
 *     ZSE Info 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; either version 3 of the License, or
 *     any later version.
 *
 *     ZSE Info 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 Foobar; if not, write to the Free Software
 *     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

package org.enbyted.android.zseinfo.data.synchronise;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * Created by Bartosz Grabias on 25.02.14.
 */
public class Helper {
    public static void downloadFile(URL url, OutputStream output) throws IOException {
        InputStream input = null;
        HttpURLConnection connection = null;
        try {
            connection = (HttpURLConnection) url.openConnection();
            connection.connect();

            if(connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
                throw new IOException("Błąd połączenia z serwerem: " + connection.getResponseCode() + " " + connection.getResponseMessage());
            }

            int fileLength = connection.getContentLength();

            input = connection.getInputStream();

            byte[] data = new byte[4096];
            long total = 0;
            int count;
            while((count = input.read(data)) != -1) {

                total += count;

                output.write(data, 0, count);
            }
        } finally {
            try {
                if(output != null)
                    output.close();
                if(input != null)
                    input.close();
            } catch (IOException ignore) {}
            if(connection != null)
                connection.disconnect();
        }
    }
}