1 files changed, 144 insertions, 0 deletions
diff --git a/src/org/happysanta/gd/API/DownloadFile.java b/src/org/happysanta/gd/API/DownloadFile.java
new file mode 100644
index 0000000..2920c27
--- /dev/null
+++ b/src/org/happysanta/gd/API/DownloadFile.java
@@ -0,0 +1,144 @@
+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);
+		}
+
+	}
+
+
+}