Downloader.java

/*
 * Copyright 2012 Rui Araújo, Luís Fonseca
 *
 * This file is part of Router Keygen.
 *
 * Router Keygen 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
 * (at your option) any later version.
 * 
 * Router Keygen 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 Router Keygen.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.exobel.routerkeygen;

import android.os.Environment;
import android.os.Handler;
import android.os.Message;

import java.io.DataInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.net.URL;
import java.net.URLConnection;

class Downloader extends Thread {
    private final Handler messHand;
    private final String urlDownload;
    private boolean stopRequested = false;
    private boolean deleteTemp = false;

    public Downloader(Handler messHand, String urlDownload) {
        this.messHand = messHand;
        this.urlDownload = urlDownload;
    }

    @SuppressWarnings("deprecation")
    public void run() {
        File myDicFile;
        URLConnection con;
        DataInputStream dis;
        FileOutputStream fos;
        int myProgress;
        int fileLen, byteRead;
        byte[] buf;
        try {

            con = new URL(urlDownload).openConnection();
            myDicFile = new File(Environment.getExternalStorageDirectory()
                    .getPath() + File.separator + "DicTemp.dic");

            // Append mode on
            fos = new FileOutputStream(myDicFile, true);

            // Resuming if possible
            myProgress = byteRead = (int) myDicFile.length();
            if (byteRead > 0)
                con.setRequestProperty("Range", "bytes=" + byteRead + "-");

            dis = new DataInputStream(con.getInputStream());
            fileLen = myProgress + con.getContentLength();
            messHand.sendMessage(Message.obtain(messHand, 2, myProgress,
                    fileLen));
            // Checking if external storage has enough memory ...
            android.os.StatFs stat = new android.os.StatFs(Environment
                    .getExternalStorageDirectory().getPath());
            if (stat.getBlockSize() * stat.getAvailableBlocks() < fileLen)
                messHand.sendEmptyMessage(1);

            buf = new byte[65536];
            while (myProgress < fileLen) {
                try {

                    if ((byteRead = dis.read(buf)) != -1) {
                        fos.write(buf, 0, byteRead);
                        myProgress += byteRead;
                    } else {
                        dis.close();
                        fos.close();
                        myProgress = fileLen;
                    }
                } catch (Exception e) {
                }
                messHand.sendMessage(Message.obtain(messHand, 4, myProgress,
                        fileLen));
                if (isStopRequested()) {
                    if (isDeleteTemp())
                        myDicFile.delete();
                    dis.close();
                    fos.close();
                    return;
                }
            }
            messHand.sendEmptyMessage(3);
        } catch (FileNotFoundException e) {
            messHand.sendEmptyMessage(0);
        } catch (Exception e) {
            messHand.sendEmptyMessage(-1);
        }
    }

    private boolean isStopRequested() {
        return stopRequested;
    }

    public void setStopRequested(boolean stopRequested) {
        this.stopRequested = stopRequested;
    }

    private boolean isDeleteTemp() {
        return deleteTemp;
    }

    public void setDeleteTemp(boolean deleteTemp) {
        this.deleteTemp = deleteTemp;
    }

}