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package org.happysanta.gd.API;
import android.content.Context;
import android.os.AsyncTask;
import android.os.PowerManager;
import org.apache.http.HttpException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import static org.happysanta.gd.Helpers.getGDActivity;
public class DownloadFile {
private String urlString;
private DownloadHandler handler;
private FileOutputStream output;
private AsyncDownloadTask task;
public DownloadFile(String url, FileOutputStream output) {
this.urlString = url;
this.output = output;
}
public DownloadFile(String url, FileOutputStream output, DownloadHandler handler) {
this(url, output);
this.handler = handler;
}
public void setDownloadHandler(DownloadHandler handler) {
this.handler = handler;
}
public void start() {
task = new AsyncDownloadTask();
task.execute();
}
public void cancel() {
if (task != null) {
task.cancel(true);
task = null;
}
}
protected class AsyncDownloadTask extends AsyncTask<Void, Integer, Throwable> {
private PowerManager.WakeLock lock;
@Override
protected Throwable doInBackground(Void... params) {
// OutputStream output = (FileOutputStream)params[1];
InputStream input = null;
HttpURLConnection connection = null;
try {
URL url = new URL(urlString);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
// expect HTTP 200 OK, so we don't mistakenly save error report
// instead of the file
if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
return new HttpException("Server returned HTTP " + connection.getResponseCode()
+ " " + connection.getResponseMessage());
}
// this will be useful to display download percentage
// might be -1: server did not report the length
int fileLength = connection.getContentLength();
// download the file
input = connection.getInputStream();
byte data[] = new byte[4096];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
// allow canceling with back button
if (isCancelled()) {
input.close();
return null;
}
total += count;
// publishing the progress....
if (fileLength > 0) // only if total length is known
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
} catch (Exception e) {
return e;
} finally {
try {
if (output != null)
output.close();
if (input != null)
input.close();
} catch (IOException ignored) {
}
if (connection != null)
connection.disconnect();
}
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
// take CPU lock to prevent CPU from going off if the user
// presses the power button during download
PowerManager pm = (PowerManager) getGDActivity().getSystemService(Context.POWER_SERVICE);
lock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
getClass().getName());
lock.acquire();
handler.onStart();
}
@Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
handler.onProgress(progress[0]);
}
@Override
protected void onPostExecute(Throwable error) {
lock.release();
handler.onFinish(error);
}
}
}
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