Core Apps » Bazaar

package org.fdroid.fdroid.net;

import android.content.Context;

import android.os.Build;

import java.io.File;

import java.io.IOException;

import java.net.URL;

public class DownloaderFactory {

    /**

     * Downloads to a temporary file, which *you must delete yourself when

     * you are done.  It is stored in {@link Context#getCacheDir()} and starts

     * with the prefix {@code dl-}.

     */

    public static Downloader create(Context context, String urlString)

            throws IOException {

        return create(context, new URL(urlString));

    }

    /**

     * Downloads to a temporary file, which *you must delete yourself when

     * you are done.  It is stored in {@link Context#getCacheDir()} and starts

     * with the prefix {@code dl-}.

     */

    public static Downloader create(Context context, URL url)

            throws IOException {

        File destFile = File.createTempFile("dl-", "", context.getCacheDir());

        destFile.deleteOnExit(); // this probably does nothing, but maybe...

        return create(context, url, destFile);

    }

    public static Downloader create(Context context, String urlString, File destFile)

            throws IOException {

        return create(context, new URL(urlString), destFile);

    }

    public static Downloader create(Context context, URL url, File destFile)

            throws IOException {

        if (isBluetoothAddress(url)) {

            String macAddress = url.getHost().replace("-", ":");

            return new BluetoothDownloader(context, macAddress, url, destFile);

        } else if (isOnionAddress(url)) {

            return new TorHttpDownloader(context, url, destFile);

        } else {

            return new HttpDownloader(context, url, destFile);

        }

    }

    private static boolean isBluetoothAddress(URL url) {

        return "bluetooth".equalsIgnoreCase(url.getProtocol());

    }

    public static AsyncDownloader createAsync(Context context, String urlString, File destFile, String title, String id, AsyncDownloader.Listener listener) throws IOException {

        return createAsync(context, new URL(urlString), destFile, title, id, listener);

    }

    public static AsyncDownloader createAsync(Context context, URL url, File destFile, String title, String id, AsyncDownloader.Listener listener)

            throws IOException {

        if (canUseDownloadManager(url)) {

            return new AsyncDownloaderFromAndroid(context, listener, title, id, url.toString(), destFile);

        } else {

            return new AsyncDownloadWrapper(create(context, url, destFile), listener);

        }

    }

    static boolean isOnionAddress(URL url) {

        return url.getHost().endsWith(".onion");

    }

    /**

     * Tests to see if we can use Android's DownloadManager to download the APK, instead of

     * a downloader returned from DownloadFactory.

     */

    private static boolean canUseDownloadManager(URL url) {

        return Build.VERSION.SDK_INT > Build.VERSION_CODES.FROYO && !isOnionAddress(url);

    }

}