michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.updater;
michael@0: 
michael@0: import org.mozilla.gecko.AppConstants;
michael@0: import org.mozilla.gecko.R;
michael@0: 
michael@0: import org.mozilla.apache.commons.codec.binary.Hex;
michael@0: 
michael@0: import org.w3c.dom.Document;
michael@0: import org.w3c.dom.Node;
michael@0: import org.w3c.dom.NodeList;
michael@0: 
michael@0: import android.app.AlarmManager;
michael@0: import android.app.IntentService;
michael@0: import android.app.Notification;
michael@0: import android.app.NotificationManager;
michael@0: import android.app.PendingIntent;
michael@0: import android.app.Service;
michael@0: import android.content.Context;
michael@0: import android.content.Intent;
michael@0: import android.content.SharedPreferences;
michael@0: import android.net.ConnectivityManager;
michael@0: import android.net.NetworkInfo;
michael@0: import android.net.Uri;
michael@0: import android.os.Environment;
michael@0: import android.support.v4.app.NotificationCompat;
michael@0: import android.support.v4.app.NotificationCompat.Builder;
michael@0: import android.util.Log;
michael@0: 
michael@0: import java.io.BufferedInputStream;
michael@0: import java.io.BufferedOutputStream;
michael@0: import java.io.File;
michael@0: import java.io.FileInputStream;
michael@0: import java.io.FileOutputStream;
michael@0: import java.io.InputStream;
michael@0: import java.io.OutputStream;
michael@0: import java.net.Proxy;
michael@0: import java.net.ProxySelector;
michael@0: import java.net.URL;
michael@0: import java.net.URLConnection;
michael@0: import java.security.MessageDigest;
michael@0: import java.util.Calendar;
michael@0: import java.util.GregorianCalendar;
michael@0: import java.util.List;
michael@0: import java.util.TimeZone;
michael@0: 
michael@0: import javax.xml.parsers.DocumentBuilder;
michael@0: import javax.xml.parsers.DocumentBuilderFactory;
michael@0: 
michael@0: public class UpdateService extends IntentService {
michael@0:     private static final int BUFSIZE = 8192;
michael@0:     private static final int NOTIFICATION_ID = 0x3e40ddbd;
michael@0: 
michael@0:     private static final String LOGTAG = "UpdateService";
michael@0: 
michael@0:     private static final int INTERVAL_LONG = 86400000; // in milliseconds
michael@0:     private static final int INTERVAL_SHORT = 14400000; // again, in milliseconds
michael@0:     private static final int INTERVAL_RETRY = 3600000;
michael@0: 
michael@0:     private static final String PREFS_NAME = "UpdateService";
michael@0:     private static final String KEY_LAST_BUILDID = "UpdateService.lastBuildID";
michael@0:     private static final String KEY_LAST_HASH_FUNCTION = "UpdateService.lastHashFunction";
michael@0:     private static final String KEY_LAST_HASH_VALUE = "UpdateService.lastHashValue";
michael@0:     private static final String KEY_LAST_FILE_NAME = "UpdateService.lastFileName";
michael@0:     private static final String KEY_LAST_ATTEMPT_DATE = "UpdateService.lastAttemptDate";
michael@0:     private static final String KEY_AUTODOWNLOAD_POLICY = "UpdateService.autoDownloadPolicy";
michael@0: 
michael@0:     private SharedPreferences mPrefs;
michael@0: 
michael@0:     private NotificationManager mNotificationManager;
michael@0:     private ConnectivityManager mConnectivityManager;
michael@0:     private Builder mBuilder;
michael@0: 
michael@0:     private boolean mDownloading;
michael@0:     private boolean mCancelDownload;
michael@0:     private boolean mApplyImmediately;
michael@0: 
michael@0:     public UpdateService() {
michael@0:         super("updater");
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void onCreate () {
michael@0:         super.onCreate();
michael@0: 
michael@0:         mPrefs = getSharedPreferences(PREFS_NAME, 0);
michael@0:         mNotificationManager = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
michael@0:         mConnectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
michael@0:         mCancelDownload = false;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public synchronized int onStartCommand (Intent intent, int flags, int startId) {
michael@0:         // If we are busy doing a download, the new Intent here would normally be queued for
michael@0:         // execution once that is done. In this case, however, we want to flip the boolean
michael@0:         // while that is running, so handle that now.
michael@0:         if (mDownloading && UpdateServiceHelper.ACTION_APPLY_UPDATE.equals(intent.getAction())) {
michael@0:             Log.i(LOGTAG, "will apply update when download finished");
michael@0: 
michael@0:             mApplyImmediately = true;
michael@0:             showDownloadNotification();
michael@0:         } else if (UpdateServiceHelper.ACTION_CANCEL_DOWNLOAD.equals(intent.getAction())) {
michael@0:             mCancelDownload = true;
michael@0:         } else {
michael@0:             super.onStartCommand(intent, flags, startId);
michael@0:         }
michael@0: 
michael@0:         return Service.START_REDELIVER_INTENT;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onHandleIntent (Intent intent) {
michael@0:         if (UpdateServiceHelper.ACTION_REGISTER_FOR_UPDATES.equals(intent.getAction())) {
michael@0:             int policy = intent.getIntExtra(UpdateServiceHelper.EXTRA_AUTODOWNLOAD_NAME, -1);
michael@0:             if (policy >= 0) {
michael@0:                 setAutoDownloadPolicy(policy);
michael@0:             }
michael@0: 
michael@0:             registerForUpdates(false);
michael@0:         } else if (UpdateServiceHelper.ACTION_CHECK_FOR_UPDATE.equals(intent.getAction())) {
michael@0:             startUpdate(intent.getIntExtra(UpdateServiceHelper.EXTRA_UPDATE_FLAGS_NAME, 0));
michael@0:             // Use this instead for forcing a download from about:fennec
michael@0:             // startUpdate(UpdateServiceHelper.FLAG_FORCE_DOWNLOAD | UpdateServiceHelper.FLAG_REINSTALL);
michael@0:         } else if (UpdateServiceHelper.ACTION_DOWNLOAD_UPDATE.equals(intent.getAction())) {
michael@0:             // We always want to do the download and apply it here
michael@0:             mApplyImmediately = true;
michael@0:             startUpdate(UpdateServiceHelper.FLAG_FORCE_DOWNLOAD);
michael@0:         } else if (UpdateServiceHelper.ACTION_APPLY_UPDATE.equals(intent.getAction())) {
michael@0:             applyUpdate(intent.getStringExtra(UpdateServiceHelper.EXTRA_PACKAGE_PATH_NAME));
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private static boolean hasFlag(int flags, int flag) {
michael@0:         return (flags & flag) == flag;
michael@0:     }
michael@0: 
michael@0:     private void sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult result) {
michael@0:         Intent resultIntent = new Intent(UpdateServiceHelper.ACTION_CHECK_UPDATE_RESULT);
michael@0:         resultIntent.putExtra("result", result.toString());
michael@0:         sendBroadcast(resultIntent);
michael@0:     }
michael@0: 
michael@0:     private int getUpdateInterval(boolean isRetry) {
michael@0:         int interval;
michael@0:         if (isRetry) {
michael@0:             interval = INTERVAL_RETRY;
michael@0:         } else if (!AppConstants.RELEASE_BUILD) {
michael@0:             interval = INTERVAL_SHORT;
michael@0:         } else {
michael@0:             interval = INTERVAL_LONG;
michael@0:         }
michael@0: 
michael@0:         return interval;
michael@0:     }
michael@0: 
michael@0:     private void registerForUpdates(boolean isRetry) {
michael@0:         Calendar lastAttempt = getLastAttemptDate();
michael@0:         Calendar now = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
michael@0: 
michael@0:         int interval = getUpdateInterval(isRetry);
michael@0: 
michael@0:         if (lastAttempt == null || (now.getTimeInMillis() - lastAttempt.getTimeInMillis()) > interval) {
michael@0:             // We've either never attempted an update, or we are passed the desired
michael@0:             // time. Start an update now.
michael@0:             Log.i(LOGTAG, "no update has ever been attempted, checking now");
michael@0:             startUpdate(0);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         AlarmManager manager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
michael@0:         if (manager == null)
michael@0:             return;
michael@0: 
michael@0:         PendingIntent pending = PendingIntent.getService(this, 0, new Intent(UpdateServiceHelper.ACTION_CHECK_FOR_UPDATE, null, this, UpdateService.class), PendingIntent.FLAG_UPDATE_CURRENT);
michael@0:         manager.cancel(pending);
michael@0: 
michael@0:         lastAttempt.setTimeInMillis(lastAttempt.getTimeInMillis() + interval);
michael@0:         Log.i(LOGTAG, "next update will be at: " + lastAttempt.getTime());
michael@0: 
michael@0:         manager.set(AlarmManager.RTC_WAKEUP, lastAttempt.getTimeInMillis(), pending);
michael@0:     }
michael@0: 
michael@0:     private void startUpdate(int flags) {
michael@0:         setLastAttemptDate();
michael@0: 
michael@0:         NetworkInfo netInfo = mConnectivityManager.getActiveNetworkInfo();
michael@0:         if (netInfo == null || !netInfo.isConnected()) {
michael@0:             Log.i(LOGTAG, "not connected to the network");
michael@0:             registerForUpdates(true);
michael@0:             sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult.NOT_AVAILABLE);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         registerForUpdates(false);
michael@0: 
michael@0:         UpdateInfo info = findUpdate(hasFlag(flags, UpdateServiceHelper.FLAG_REINSTALL));
michael@0:         boolean haveUpdate = (info != null);
michael@0: 
michael@0:         if (!haveUpdate) {
michael@0:             Log.i(LOGTAG, "no update available");
michael@0:             sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult.NOT_AVAILABLE);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         Log.i(LOGTAG, "update available, buildID = " + info.buildID);
michael@0: 
michael@0:         int connectionType = netInfo.getType();
michael@0:         int autoDownloadPolicy = getAutoDownloadPolicy();
michael@0: 
michael@0: 
michael@0:         /**
michael@0:          * We only start a download automatically if one of following criteria are met:
michael@0:          *
michael@0:          * - We have a FORCE_DOWNLOAD flag passed in
michael@0:          * - The preference is set to 'always'
michael@0:          * - The preference is set to 'wifi' and we are actually using wifi (or regular ethernet)
michael@0:          */
michael@0:         boolean shouldStartDownload = hasFlag(flags, UpdateServiceHelper.FLAG_FORCE_DOWNLOAD) ||
michael@0:             autoDownloadPolicy == UpdateServiceHelper.AUTODOWNLOAD_ENABLED ||
michael@0:             (autoDownloadPolicy == UpdateServiceHelper.AUTODOWNLOAD_WIFI &&
michael@0:              (connectionType == ConnectivityManager.TYPE_WIFI || connectionType == ConnectivityManager.TYPE_ETHERNET));
michael@0: 
michael@0:         if (!shouldStartDownload) {
michael@0:             Log.i(LOGTAG, "not initiating automatic update download due to policy " + autoDownloadPolicy);
michael@0:             sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult.AVAILABLE);
michael@0: 
michael@0:             // We aren't autodownloading here, so prompt to start the update
michael@0:             Notification notification = new Notification(R.drawable.ic_status_logo, null, System.currentTimeMillis());
michael@0: 
michael@0:             Intent notificationIntent = new Intent(UpdateServiceHelper.ACTION_DOWNLOAD_UPDATE);
michael@0:             notificationIntent.setClass(this, UpdateService.class);
michael@0: 
michael@0:             PendingIntent contentIntent = PendingIntent.getService(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
michael@0:             notification.flags = Notification.FLAG_AUTO_CANCEL;
michael@0: 
michael@0:             notification.setLatestEventInfo(this, getResources().getString(R.string.updater_start_title),
michael@0:                                             getResources().getString(R.string.updater_start_select),
michael@0:                                             contentIntent);
michael@0: 
michael@0:             mNotificationManager.notify(NOTIFICATION_ID, notification);
michael@0: 
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         File pkg = downloadUpdatePackage(info, hasFlag(flags, UpdateServiceHelper.FLAG_OVERWRITE_EXISTING));
michael@0:         if (pkg == null) {
michael@0:             sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult.NOT_AVAILABLE);
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         Log.i(LOGTAG, "have update package at " + pkg);
michael@0: 
michael@0:         saveUpdateInfo(info, pkg);
michael@0:         sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult.DOWNLOADED);
michael@0: 
michael@0:         if (mApplyImmediately) {
michael@0:             applyUpdate(pkg);
michael@0:         } else {
michael@0:             // Prompt to apply the update
michael@0:             Notification notification = new Notification(R.drawable.ic_status_logo, null, System.currentTimeMillis());
michael@0: 
michael@0:             Intent notificationIntent = new Intent(UpdateServiceHelper.ACTION_APPLY_UPDATE);
michael@0:             notificationIntent.setClass(this, UpdateService.class);
michael@0:             notificationIntent.putExtra(UpdateServiceHelper.EXTRA_PACKAGE_PATH_NAME, pkg.getAbsolutePath());
michael@0: 
michael@0:             PendingIntent contentIntent = PendingIntent.getService(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
michael@0:             notification.flags = Notification.FLAG_AUTO_CANCEL;
michael@0: 
michael@0:             notification.setLatestEventInfo(this, getResources().getString(R.string.updater_apply_title),
michael@0:                                             getResources().getString(R.string.updater_apply_select),
michael@0:                                             contentIntent);
michael@0: 
michael@0:             mNotificationManager.notify(NOTIFICATION_ID, notification);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private URLConnection openConnectionWithProxy(URL url) throws java.net.URISyntaxException, java.io.IOException {
michael@0:         Log.i(LOGTAG, "opening connection with url: " + url);
michael@0: 
michael@0:         ProxySelector ps = ProxySelector.getDefault();
michael@0:         Proxy proxy = Proxy.NO_PROXY;
michael@0:         if (ps != null) {
michael@0:             List<Proxy> proxies = ps.select(url.toURI());
michael@0:             if (proxies != null && !proxies.isEmpty()) {
michael@0:                 proxy = proxies.get(0);
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         return url.openConnection(proxy);
michael@0:     }
michael@0: 
michael@0:     private UpdateInfo findUpdate(boolean force) {
michael@0:         try {
michael@0:             URL url = UpdateServiceHelper.getUpdateUrl(this, force);
michael@0: 
michael@0:             DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
michael@0:             Document dom = builder.parse(openConnectionWithProxy(url).getInputStream());
michael@0: 
michael@0:             NodeList nodes = dom.getElementsByTagName("update");
michael@0:             if (nodes == null || nodes.getLength() == 0)
michael@0:                 return null;
michael@0: 
michael@0:             Node updateNode = nodes.item(0);
michael@0:             Node buildIdNode = updateNode.getAttributes().getNamedItem("buildID");
michael@0:             if (buildIdNode == null)
michael@0:                 return null;
michael@0: 
michael@0:             nodes = dom.getElementsByTagName("patch");
michael@0:             if (nodes == null || nodes.getLength() == 0)
michael@0:                 return null;
michael@0: 
michael@0:             Node patchNode = nodes.item(0);
michael@0:             Node urlNode = patchNode.getAttributes().getNamedItem("URL");
michael@0:             Node hashFunctionNode = patchNode.getAttributes().getNamedItem("hashFunction");
michael@0:             Node hashValueNode = patchNode.getAttributes().getNamedItem("hashValue");
michael@0:             Node sizeNode = patchNode.getAttributes().getNamedItem("size");
michael@0: 
michael@0:             if (urlNode == null || hashFunctionNode == null ||
michael@0:                 hashValueNode == null || sizeNode == null) {
michael@0:                 return null;
michael@0:             }
michael@0: 
michael@0:             // Fill in UpdateInfo from the XML data
michael@0:             UpdateInfo info = new UpdateInfo();
michael@0:             info.url = new URL(urlNode.getTextContent());
michael@0:             info.buildID = buildIdNode.getTextContent();
michael@0:             info.hashFunction = hashFunctionNode.getTextContent();
michael@0:             info.hashValue = hashValueNode.getTextContent();
michael@0: 
michael@0:             try {
michael@0:                 info.size = Integer.parseInt(sizeNode.getTextContent());
michael@0:             } catch (NumberFormatException e) {
michael@0:                 Log.e(LOGTAG, "Failed to find APK size: ", e);
michael@0:                 return null;
michael@0:             }
michael@0: 
michael@0:             // Make sure we have all the stuff we need to apply the update
michael@0:             if (!info.isValid()) {
michael@0:                 Log.e(LOGTAG, "missing some required update information, have: " + info);
michael@0:                 return null;
michael@0:             }
michael@0: 
michael@0:             return info;
michael@0:         } catch (Exception e) {
michael@0:             Log.e(LOGTAG, "failed to check for update: ", e);
michael@0:             return null;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private MessageDigest createMessageDigest(String hashFunction) {
michael@0:         String javaHashFunction = null;
michael@0: 
michael@0:         if ("sha512".equalsIgnoreCase(hashFunction)) {
michael@0:             javaHashFunction = "SHA-512";
michael@0:         } else {
michael@0:             Log.e(LOGTAG, "Unhandled hash function: " + hashFunction);
michael@0:             return null;
michael@0:         }
michael@0: 
michael@0:         try {
michael@0:             return MessageDigest.getInstance(javaHashFunction);
michael@0:         } catch (java.security.NoSuchAlgorithmException e) {
michael@0:             Log.e(LOGTAG, "Couldn't find algorithm " + javaHashFunction, e);
michael@0:             return null;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private void showDownloadNotification() {
michael@0:         showDownloadNotification(null);
michael@0:     }
michael@0: 
michael@0:     private void showDownloadNotification(File downloadFile) {
michael@0: 
michael@0:         Intent notificationIntent = new Intent(UpdateServiceHelper.ACTION_APPLY_UPDATE);
michael@0:         notificationIntent.setClass(this, UpdateService.class);
michael@0: 
michael@0:         Intent cancelIntent = new Intent(UpdateServiceHelper.ACTION_CANCEL_DOWNLOAD);
michael@0:         cancelIntent.setClass(this, UpdateService.class);
michael@0: 
michael@0:         if (downloadFile != null)
michael@0:             notificationIntent.putExtra(UpdateServiceHelper.EXTRA_PACKAGE_PATH_NAME, downloadFile.getAbsolutePath());
michael@0: 
michael@0:         PendingIntent contentIntent = PendingIntent.getService(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
michael@0:         PendingIntent deleteIntent = PendingIntent.getService(this, 0, cancelIntent, PendingIntent.FLAG_CANCEL_CURRENT);
michael@0: 
michael@0:         mBuilder = new NotificationCompat.Builder(this);
michael@0:         mBuilder.setContentTitle(getResources().getString(R.string.updater_downloading_title))
michael@0:     	    .setContentText(mApplyImmediately ? "" : getResources().getString(R.string.updater_downloading_select))
michael@0:     	    .setSmallIcon(android.R.drawable.stat_sys_download)
michael@0:     	    .setContentIntent(contentIntent)
michael@0:             .setDeleteIntent(deleteIntent);
michael@0: 
michael@0:         mBuilder.setProgress(100, 0, true);
michael@0:         mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
michael@0:     }
michael@0: 
michael@0:     private void showDownloadFailure() {
michael@0:         Notification notification = new Notification(R.drawable.ic_status_logo, null, System.currentTimeMillis());
michael@0: 
michael@0:         Intent notificationIntent = new Intent(UpdateServiceHelper.ACTION_CHECK_FOR_UPDATE);
michael@0:         notificationIntent.setClass(this, UpdateService.class);
michael@0: 
michael@0:         PendingIntent contentIntent = PendingIntent.getService(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
michael@0: 
michael@0:         notification.setLatestEventInfo(this, getResources().getString(R.string.updater_downloading_title_failed),
michael@0:                                         getResources().getString(R.string.updater_downloading_retry),
michael@0:                                         contentIntent);
michael@0: 
michael@0:         mNotificationManager.notify(NOTIFICATION_ID, notification);
michael@0:     }
michael@0: 
michael@0:     private File downloadUpdatePackage(UpdateInfo info, boolean overwriteExisting) {
michael@0:         File downloadFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), new File(info.url.getFile()).getName());
michael@0: 
michael@0:         if (!overwriteExisting && info.buildID.equals(getLastBuildID()) && downloadFile.exists()) {
michael@0:             // The last saved buildID is the same as the one for the current update. We also have a file
michael@0:             // already downloaded, so it's probably the package we want. Verify it to be sure and just
michael@0:             // return that if it matches.
michael@0: 
michael@0:             if (verifyDownloadedPackage(downloadFile)) {
michael@0:                 Log.i(LOGTAG, "using existing update package");
michael@0:                 return downloadFile;
michael@0:             } else {
michael@0:                 // Didn't match, so we're going to download a new one.
michael@0:                 downloadFile.delete();
michael@0:             }
michael@0:         }
michael@0: 
michael@0:         Log.i(LOGTAG, "downloading update package");
michael@0:         sendCheckUpdateResult(UpdateServiceHelper.CheckUpdateResult.DOWNLOADING);
michael@0: 
michael@0:         OutputStream output = null;
michael@0:         InputStream input = null;
michael@0: 
michael@0:         mDownloading = true;
michael@0:         mCancelDownload = false;
michael@0:         showDownloadNotification(downloadFile);
michael@0: 
michael@0:         try {
michael@0:             URLConnection conn = openConnectionWithProxy(info.url);
michael@0:             int length = conn.getContentLength();
michael@0: 
michael@0:             output = new BufferedOutputStream(new FileOutputStream(downloadFile));
michael@0:             input = new BufferedInputStream(conn.getInputStream());
michael@0: 
michael@0:             byte[] buf = new byte[BUFSIZE];
michael@0:             int len = 0;
michael@0: 
michael@0:             int bytesRead = 0;
michael@0:             int lastNotify = 0;
michael@0: 
michael@0:             while ((len = input.read(buf, 0, BUFSIZE)) > 0 && !mCancelDownload) {
michael@0:                 output.write(buf, 0, len);
michael@0:                 bytesRead += len;
michael@0:                 // Updating the notification takes time so only do it every 1MB
michael@0:                 if(bytesRead - lastNotify > 1048576) {
michael@0: 	                mBuilder.setProgress(length, bytesRead, false);
michael@0: 	                mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
michael@0: 	                lastNotify = bytesRead;
michael@0:                 }
michael@0:             }
michael@0: 
michael@0:             mNotificationManager.cancel(NOTIFICATION_ID);
michael@0: 
michael@0:             // if the download was canceled by the user
michael@0:             // delete the update package
michael@0:             if (mCancelDownload) {
michael@0:                 Log.i(LOGTAG, "download canceled by user!");
michael@0:                 downloadFile.delete();
michael@0: 
michael@0:                 return null;
michael@0:             } else {
michael@0:                 Log.i(LOGTAG, "completed update download!");
michael@0:                 return downloadFile;
michael@0:             }
michael@0:         } catch (Exception e) {
michael@0:             downloadFile.delete();
michael@0:             showDownloadFailure();
michael@0: 
michael@0:             Log.e(LOGTAG, "failed to download update: ", e);
michael@0:             return null;
michael@0:         } finally {
michael@0:             try {
michael@0:                 if (input != null)
michael@0:                     input.close();
michael@0:             } catch (java.io.IOException e) {}
michael@0: 
michael@0:             try {
michael@0:                 if (output != null)
michael@0:                     output.close();
michael@0:             } catch (java.io.IOException e) {}
michael@0: 
michael@0:             mDownloading = false;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     private boolean verifyDownloadedPackage(File updateFile) {
michael@0:         MessageDigest digest = createMessageDigest(getLastHashFunction());
michael@0:         if (digest == null)
michael@0:             return false;
michael@0: 
michael@0:         InputStream input = null;
michael@0: 
michael@0:         try {
michael@0:             input = new BufferedInputStream(new FileInputStream(updateFile));
michael@0: 
michael@0:             byte[] buf = new byte[BUFSIZE];
michael@0:             int len;
michael@0:             while ((len = input.read(buf, 0, BUFSIZE)) > 0) {
michael@0:                 digest.update(buf, 0, len);
michael@0:             }
michael@0:         } catch (java.io.IOException e) {
michael@0:             Log.e(LOGTAG, "Failed to verify update package: ", e);
michael@0:             return false;
michael@0:         } finally {
michael@0:             try {
michael@0:                 if (input != null)
michael@0:                     input.close();
michael@0:             } catch(java.io.IOException e) {}
michael@0:         }
michael@0: 
michael@0:         String hex = Hex.encodeHexString(digest.digest());
michael@0:         if (!hex.equals(getLastHashValue())) {
michael@0:             Log.e(LOGTAG, "Package hash does not match");
michael@0:             return false;
michael@0:         }
michael@0: 
michael@0:         return true;
michael@0:     }
michael@0: 
michael@0:     private void applyUpdate(String updatePath) {
michael@0:         if (updatePath == null) {
michael@0:             updatePath = mPrefs.getString(KEY_LAST_FILE_NAME, null);
michael@0:         }
michael@0:         applyUpdate(new File(updatePath));
michael@0:     }
michael@0: 
michael@0:     private void applyUpdate(File updateFile) {
michael@0:         mApplyImmediately = false;
michael@0: 
michael@0:         if (!updateFile.exists())
michael@0:             return;
michael@0: 
michael@0:         Log.i(LOGTAG, "Verifying package: " + updateFile);
michael@0: 
michael@0:         if (!verifyDownloadedPackage(updateFile)) {
michael@0:             Log.e(LOGTAG, "Not installing update, failed verification");
michael@0:             return;
michael@0:         }
michael@0: 
michael@0:         Intent intent = new Intent(Intent.ACTION_VIEW);
michael@0:         intent.setDataAndType(Uri.fromFile(updateFile), "application/vnd.android.package-archive");
michael@0:         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
michael@0:         startActivity(intent);
michael@0:     }
michael@0: 
michael@0:     private String getLastBuildID() {
michael@0:         return mPrefs.getString(KEY_LAST_BUILDID, null);
michael@0:     }
michael@0: 
michael@0:     private String getLastHashFunction() {
michael@0:         return mPrefs.getString(KEY_LAST_HASH_FUNCTION, null);
michael@0:     }
michael@0: 
michael@0:     private String getLastHashValue() {
michael@0:         return mPrefs.getString(KEY_LAST_HASH_VALUE, null);
michael@0:     }
michael@0: 
michael@0:     private Calendar getLastAttemptDate() {
michael@0:         long lastAttempt = mPrefs.getLong(KEY_LAST_ATTEMPT_DATE, -1);
michael@0:         if (lastAttempt < 0)
michael@0:             return null;
michael@0: 
michael@0:         GregorianCalendar cal = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
michael@0:         cal.setTimeInMillis(lastAttempt);
michael@0:         return cal;
michael@0:     }
michael@0: 
michael@0:     private void setLastAttemptDate() {
michael@0:         SharedPreferences.Editor editor = mPrefs.edit();
michael@0:         editor.putLong(KEY_LAST_ATTEMPT_DATE, System.currentTimeMillis());
michael@0:         editor.commit();
michael@0:     }
michael@0: 
michael@0:     private int getAutoDownloadPolicy() {
michael@0:         return mPrefs.getInt(KEY_AUTODOWNLOAD_POLICY, UpdateServiceHelper.AUTODOWNLOAD_WIFI);
michael@0:     }
michael@0: 
michael@0:     private void setAutoDownloadPolicy(int policy) {
michael@0:         SharedPreferences.Editor editor = mPrefs.edit();
michael@0:         editor.putInt(KEY_AUTODOWNLOAD_POLICY, policy);
michael@0:         editor.commit();
michael@0:     }
michael@0: 
michael@0:     private void saveUpdateInfo(UpdateInfo info, File downloaded) {
michael@0:         SharedPreferences.Editor editor = mPrefs.edit();
michael@0:         editor.putString(KEY_LAST_BUILDID, info.buildID);
michael@0:         editor.putString(KEY_LAST_HASH_FUNCTION, info.hashFunction);
michael@0:         editor.putString(KEY_LAST_HASH_VALUE, info.hashValue);
michael@0:         editor.putString(KEY_LAST_FILE_NAME, downloaded.toString());
michael@0:         editor.commit();
michael@0:     }
michael@0: 
michael@0:     private class UpdateInfo {
michael@0:         public URL url;
michael@0:         public String buildID;
michael@0:         public String hashFunction;
michael@0:         public String hashValue;
michael@0:         public int size;
michael@0: 
michael@0:         private boolean isNonEmpty(String s) {
michael@0:             return s != null && s.length() > 0;
michael@0:         }
michael@0: 
michael@0:         public boolean isValid() {
michael@0:             return url != null && isNonEmpty(buildID) &&
michael@0:                 isNonEmpty(hashFunction) && isNonEmpty(hashValue) && size > 0;
michael@0:         }
michael@0: 
michael@0:         @Override
michael@0:         public String toString() {
michael@0:             return "url = " + url + ", buildID = " + buildID + ", hashFunction = " + hashFunction + ", hashValue = " + hashValue + ", size = " + size;
michael@0:         }
michael@0:     }
michael@0: }