src/com/owncloud/android/files/services/FileDownloader.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.files.services;
  20
  21 import java.io.File;
  22 import java.io.IOException;
  23 import java.util.AbstractList;
  24 import java.util.HashMap;
  25 import java.util.Iterator;
  26 import java.util.Map;
  27 import java.util.Vector;
  28 import java.util.concurrent.ConcurrentHashMap;
  29 import java.util.concurrent.ConcurrentMap;
  30
  31 import com.owncloud.android.R;
  32 import com.owncloud.android.authentication.AuthenticatorActivity;
  33 import com.owncloud.android.datamodel.FileDataStorageManager;
  34 import com.owncloud.android.datamodel.OCFile;
  35
  36 import com.owncloud.android.oc_framework.network.webdav.OnDatatransferProgressListener;
  37 import com.owncloud.android.oc_framework.network.webdav.OwnCloudClientFactory;
  38 import com.owncloud.android.oc_framework.network.webdav.WebdavClient;
  39 import com.owncloud.android.operations.DownloadFileOperation;
  40 import com.owncloud.android.oc_framework.operations.RemoteOperationResult;
  41 import com.owncloud.android.oc_framework.operations.RemoteOperationResult.ResultCode;
  42 import com.owncloud.android.ui.activity.FileActivity;
  43 import com.owncloud.android.ui.activity.FileDisplayActivity;
  44 import com.owncloud.android.ui.preview.PreviewImageActivity;
  45 import com.owncloud.android.ui.preview.PreviewImageFragment;
  46 import com.owncloud.android.utils.DisplayUtils;
  47 import com.owncloud.android.utils.Log_OC;
  48
  49 import android.accounts.Account;
  50 import android.accounts.AccountsException;
  51 import android.app.Notification;
  52 import android.app.NotificationManager;
  53 import android.app.PendingIntent;
  54 import android.app.Service;
  55 import android.content.Intent;
  56 import android.os.Binder;
  57 import android.os.Handler;
  58 import android.os.HandlerThread;
  59 import android.os.IBinder;
  60 import android.os.Looper;
  61 import android.os.Message;
  62 import android.os.Process;
  63 import android.widget.RemoteViews;
  64
  65 public class FileDownloader extends Service implements OnDatatransferProgressListener {
  66
  67     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  68     public static final String EXTRA_FILE = "FILE";
  69
  70     private static final String DOWNLOAD_ADDED_MESSAGE = "DOWNLOAD_ADDED";
  71     private static final String DOWNLOAD_FINISH_MESSAGE = "DOWNLOAD_FINISH";
  72     public static final String EXTRA_DOWNLOAD_RESULT = "RESULT";
  73     public static final String EXTRA_FILE_PATH = "FILE_PATH";
  74     public static final String EXTRA_REMOTE_PATH = "REMOTE_PATH";
  75     public static final String ACCOUNT_NAME = "ACCOUNT_NAME";
  76
  77     private static final String TAG = "FileDownloader";
  78
  79     private Looper mServiceLooper;
  80     private ServiceHandler mServiceHandler;
  81     private IBinder mBinder;
  82     private WebdavClient mDownloadClient = null;
  83     private Account mLastAccount = null;
  84     private FileDataStorageManager mStorageManager;
  85
  86     private ConcurrentMap<String, DownloadFileOperation> mPendingDownloads = new ConcurrentHashMap<String, DownloadFileOperation>();
  87     private DownloadFileOperation mCurrentDownload = null;
  88
  89     private NotificationManager mNotificationManager;
  90     private Notification mNotification;
  91     private int mLastPercent;
  92
  93
  94     public static String getDownloadAddedMessage() {
  95         return FileDownloader.class.getName().toString() + DOWNLOAD_ADDED_MESSAGE;
  96     }
  97
  98     public static String getDownloadFinishMessage() {
  99         return FileDownloader.class.getName().toString() + DOWNLOAD_FINISH_MESSAGE;
 100     }
 101
 102     /**
 103      * Builds a key for mPendingDownloads from the account and file to download
 104      *
 105      * @param account   Account where the file to download is stored
 106      * @param file      File to download
 107      */
 108     private String buildRemoteName(Account account, OCFile file) {
 109         return account.name + file.getRemotePath();
 110     }
 111
 112
 113     /**
 114      * Service initialization
 115      */
 116     @Override
 117     public void onCreate() {
 118         super.onCreate();
 119         mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
 120         HandlerThread thread = new HandlerThread("FileDownloaderThread",
 121                 Process.THREAD_PRIORITY_BACKGROUND);
 122         thread.start();
 123         mServiceLooper = thread.getLooper();
 124         mServiceHandler = new ServiceHandler(mServiceLooper, this);
 125         mBinder = new FileDownloaderBinder();
 126     }
 127
 128     /**
 129      * Entry point to add one or several files to the queue of downloads.
 130      *
 131      * New downloads are added calling to startService(), resulting in a call to this method. This ensures the service will keep on working
 132      * although the caller activity goes away.
 133      */
 134     @Override
 135     public int onStartCommand(Intent intent, int flags, int startId) {
 136         if (    !intent.hasExtra(EXTRA_ACCOUNT) ||
 137                 !intent.hasExtra(EXTRA_FILE)
 138                 /*!intent.hasExtra(EXTRA_FILE_PATH) ||
 139                 !intent.hasExtra(EXTRA_REMOTE_PATH)*/
 140            ) {
 141             Log_OC.e(TAG, "Not enough information provided in intent");
 142             return START_NOT_STICKY;
 143         }
 144         Account account = intent.getParcelableExtra(EXTRA_ACCOUNT);
 145         OCFile file = intent.getParcelableExtra(EXTRA_FILE);
 146
 147         AbstractList<String> requestedDownloads = new Vector<String>(); // dvelasco: now this always contains just one element, but that can change in a near future (download of multiple selection)
 148         String downloadKey = buildRemoteName(account, file);
 149         try {
 150             DownloadFileOperation newDownload = new DownloadFileOperation(account, file);
 151             mPendingDownloads.putIfAbsent(downloadKey, newDownload);
 152             newDownload.addDatatransferProgressListener(this);
 153             newDownload.addDatatransferProgressListener((FileDownloaderBinder)mBinder);
 154             requestedDownloads.add(downloadKey);
 155             sendBroadcastNewDownload(newDownload);
 156
 157         } catch (IllegalArgumentException e) {
 158             Log_OC.e(TAG, "Not enough information provided in intent: " + e.getMessage());
 159             return START_NOT_STICKY;
 160         }
 161
 162         if (requestedDownloads.size() > 0) {
 163             Message msg = mServiceHandler.obtainMessage();
 164             msg.arg1 = startId;
 165             msg.obj = requestedDownloads;
 166             mServiceHandler.sendMessage(msg);
 167         }
 168
 169         return START_NOT_STICKY;
 170     }
 171
 172
 173     /**
 174      * Provides a binder object that clients can use to perform operations on the queue of downloads, excepting the addition of new files.
 175      *
 176      * Implemented to perform cancellation, pause and resume of existing downloads.
 177      */
 178     @Override
 179     public IBinder onBind(Intent arg0) {
 180         return mBinder;
 181     }
 182
 183
 184     /**
 185      * Called when ALL the bound clients were onbound.
 186      */
 187     @Override
 188     public boolean onUnbind(Intent intent) {
 189         ((FileDownloaderBinder)mBinder).clearListeners();
 190         return false;   // not accepting rebinding (default behaviour)
 191     }
 192
 193
 194     /**
 195      *  Binder to let client components to perform operations on the queue of downloads.
 196      *
 197      *  It provides by itself the available operations.
 198      */
 199     public class FileDownloaderBinder extends Binder implements OnDatatransferProgressListener {
 200
 201         /**
 202          * Map of listeners that will be reported about progress of downloads from a {@link FileDownloaderBinder} instance
 203          */
 204         private Map<String, OnDatatransferProgressListener> mBoundListeners = new HashMap<String, OnDatatransferProgressListener>();
 205
 206
 207         /**
 208          * Cancels a pending or current download of a remote file.
 209          *
 210          * @param account       Owncloud account where the remote file is stored.
 211          * @param file          A file in the queue of pending downloads
 212          */
 213         public void cancel(Account account, OCFile file) {
 214             DownloadFileOperation download = null;
 215             synchronized (mPendingDownloads) {
 216                 download = mPendingDownloads.remove(buildRemoteName(account, file));
 217             }
 218             if (download != null) {
 219                 download.cancel();
 220             }
 221         }
 222
 223
 224         public void clearListeners() {
 225             mBoundListeners.clear();
 226         }
 227
 228
 229         /**
 230          * Returns True when the file described by 'file' in the ownCloud account 'account' is downloading or waiting to download.
 231          *
 232          * If 'file' is a directory, returns 'true' if some of its descendant files is downloading or waiting to download.
 233          *
 234          * @param account       Owncloud account where the remote file is stored.
 235          * @param file          A file that could be in the queue of downloads.
 236          */
 237         public boolean isDownloading(Account account, OCFile file) {
 238             if (account == null || file == null) return false;
 239             String targetKey = buildRemoteName(account, file);
 240             synchronized (mPendingDownloads) {
 241                 if (file.isFolder()) {
 242                     // this can be slow if there are many downloads :(
 243                     Iterator<String> it = mPendingDownloads.keySet().iterator();
 244                     boolean found = false;
 245                     while (it.hasNext() && !found) {
 246                         found = it.next().startsWith(targetKey);
 247                     }
 248                     return found;
 249                 } else {
 250                     return (mPendingDownloads.containsKey(targetKey));
 251                 }
 252             }
 253         }
 254
 255
 256         /**
 257          * Adds a listener interested in the progress of the download for a concrete file.
 258          *
 259          * @param listener      Object to notify about progress of transfer.
 260          * @param account       ownCloud account holding the file of interest.
 261          * @param file          {@link OCfile} of interest for listener.
 262          */
 263         public void addDatatransferProgressListener (OnDatatransferProgressListener listener, Account account, OCFile file) {
 264             if (account == null || file == null || listener == null) return;
 265             String targetKey = buildRemoteName(account, file);
 266             mBoundListeners.put(targetKey, listener);
 267         }
 268
 269
 270         /**
 271          * Removes a listener interested in the progress of the download for a concrete file.
 272          *
 273          * @param listener      Object to notify about progress of transfer.
 274          * @param account       ownCloud account holding the file of interest.
 275          * @param file          {@link OCfile} of interest for listener.
 276          */
 277         public void removeDatatransferProgressListener (OnDatatransferProgressListener listener, Account account, OCFile file) {
 278             if (account == null || file == null || listener == null) return;
 279             String targetKey = buildRemoteName(account, file);
 280             if (mBoundListeners.get(targetKey) == listener) {
 281                 mBoundListeners.remove(targetKey);
 282             }
 283         }
 284
 285         @Override
 286         public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer,
 287                 String fileName) {
 288             String key = buildRemoteName(mCurrentDownload.getAccount(), mCurrentDownload.getFile());
 289             OnDatatransferProgressListener boundListener = mBoundListeners.get(key);
 290             if (boundListener != null) {
 291                 boundListener.onTransferProgress(progressRate, totalTransferredSoFar, totalToTransfer, fileName);
 292             }
 293         }
 294
 295     }
 296
 297
 298     /**
 299      * Download worker. Performs the pending downloads in the order they were requested.
 300      *
 301      * Created with the Looper of a new thread, started in {@link FileUploader#onCreate()}.
 302      */
 303     private static class ServiceHandler extends Handler {
 304         // don't make it a final class, and don't remove the static ; lint will warn about a possible memory leak
 305         FileDownloader mService;
 306         public ServiceHandler(Looper looper, FileDownloader service) {
 307             super(looper);
 308             if (service == null)
 309                 throw new IllegalArgumentException("Received invalid NULL in parameter 'service'");
 310             mService = service;
 311         }
 312
 313         @Override
 314         public void handleMessage(Message msg) {
 315             @SuppressWarnings("unchecked")
 316             AbstractList<String> requestedDownloads = (AbstractList<String>) msg.obj;
 317             if (msg.obj != null) {
 318                 Iterator<String> it = requestedDownloads.iterator();
 319                 while (it.hasNext()) {
 320                     mService.downloadFile(it.next());
 321                 }
 322             }
 323             mService.stopSelf(msg.arg1);
 324         }
 325     }
 326
 327
 328     /**
 329      * Core download method: requests a file to download and stores it.
 330      *
 331      * @param downloadKey   Key to access the download to perform, contained in mPendingDownloads
 332      */
 333     private void downloadFile(String downloadKey) {
 334
 335         synchronized(mPendingDownloads) {
 336             mCurrentDownload = mPendingDownloads.get(downloadKey);
 337         }
 338
 339         if (mCurrentDownload != null) {
 340
 341             notifyDownloadStart(mCurrentDownload);
 342
 343             RemoteOperationResult downloadResult = null;
 344             try {
 345                 /// prepare client object to send the request to the ownCloud server
 346                 if (mDownloadClient == null || !mLastAccount.equals(mCurrentDownload.getAccount())) {
 347                     mLastAccount = mCurrentDownload.getAccount();
 348                     mStorageManager = new FileDataStorageManager(mLastAccount, getContentResolver());
 349                     mDownloadClient = OwnCloudClientFactory.createOwnCloudClient(mLastAccount, getApplicationContext());
 350                 }
 351
 352                 /// perform the download
 353                 downloadResult = mCurrentDownload.execute(mDownloadClient);
 354                 if (downloadResult.isSuccess()) {
 355                     saveDownloadedFile();
 356                 }
 357
 358             } catch (AccountsException e) {
 359                 Log_OC.e(TAG, "Error while trying to get autorization for " + mLastAccount.name, e);
 360                 downloadResult = new RemoteOperationResult(e);
 361             } catch (IOException e) {
 362                 Log_OC.e(TAG, "Error while trying to get autorization for " + mLastAccount.name, e);
 363                 downloadResult = new RemoteOperationResult(e);
 364
 365             } finally {
 366                 synchronized(mPendingDownloads) {
 367                     mPendingDownloads.remove(downloadKey);
 368                 }
 369             }
 370
 371
 372             /// notify result
 373             notifyDownloadResult(mCurrentDownload, downloadResult);
 374
 375             sendBroadcastDownloadFinished(mCurrentDownload, downloadResult);
 376         }
 377     }
 378
 379
 380     /**
 381      * Updates the OC File after a successful download.
 382      */
 383     private void saveDownloadedFile() {
 384         OCFile file = mCurrentDownload.getFile();
 385         long syncDate = System.currentTimeMillis();
 386         file.setLastSyncDateForProperties(syncDate);
 387         file.setLastSyncDateForData(syncDate);
 388         file.setModificationTimestamp(mCurrentDownload.getModificationTimestamp());
 389         file.setModificationTimestampAtLastSyncForData(mCurrentDownload.getModificationTimestamp());
 390         // file.setEtag(mCurrentDownload.getEtag());    // TODO Etag, where available
 391         file.setMimetype(mCurrentDownload.getMimeType());
 392         file.setStoragePath(mCurrentDownload.getSavePath());
 393         file.setFileLength((new File(mCurrentDownload.getSavePath()).length()));
 394         mStorageManager.saveFile(file);
 395     }
 396
 397
 398     /**
 399      * Creates a status notification to show the download progress
 400      *
 401      * @param download  Download operation starting.
 402      */
 403     private void notifyDownloadStart(DownloadFileOperation download) {
 404         /// create status notification with a progress bar
 405         mLastPercent = 0;
 406         mNotification = new Notification(DisplayUtils.getSeasonalIconId(), getString(R.string.downloader_download_in_progress_ticker), System.currentTimeMillis());
 407         mNotification.flags |= Notification.FLAG_ONGOING_EVENT;
 408         mNotification.contentView = new RemoteViews(getApplicationContext().getPackageName(), R.layout.progressbar_layout);
 409         mNotification.contentView.setProgressBar(R.id.status_progress, 100, 0, download.getSize() < 0);
 410         mNotification.contentView.setTextViewText(R.id.status_text, String.format(getString(R.string.downloader_download_in_progress_content), 0, new File(download.getSavePath()).getName()));
 411         mNotification.contentView.setImageViewResource(R.id.status_icon, DisplayUtils.getSeasonalIconId());
 412
 413         /// includes a pending intent in the notification showing the details view of the file
 414         Intent showDetailsIntent = null;
 415         if (PreviewImageFragment.canBePreviewed(download.getFile())) {
 416             showDetailsIntent = new Intent(this, PreviewImageActivity.class);
 417         } else {
 418             showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 419         }
 420         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, download.getFile());
 421         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, download.getAccount());
 422         showDetailsIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 423         mNotification.contentIntent = PendingIntent.getActivity(getApplicationContext(), (int)System.currentTimeMillis(), showDetailsIntent, 0);
 424
 425         mNotificationManager.notify(R.string.downloader_download_in_progress_ticker, mNotification);
 426     }
 427
 428
 429     /**
 430      * Callback method to update the progress bar in the status notification.
 431      */
 432     @Override
 433     public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer, String fileName) {
 434         int percent = (int)(100.0*((double)totalTransferredSoFar)/((double)totalToTransfer));
 435         if (percent != mLastPercent) {
 436             mNotification.contentView.setProgressBar(R.id.status_progress, 100, percent, totalToTransfer < 0);
 437             String text = String.format(getString(R.string.downloader_download_in_progress_content), percent, fileName);
 438             mNotification.contentView.setTextViewText(R.id.status_text, text);
 439             mNotificationManager.notify(R.string.downloader_download_in_progress_ticker, mNotification);
 440         }
 441         mLastPercent = percent;
 442     }
 443
 444
 445     /**
 446      * Updates the status notification with the result of a download operation.
 447      *
 448      * @param downloadResult    Result of the download operation.
 449      * @param download          Finished download operation
 450      */
 451     private void notifyDownloadResult(DownloadFileOperation download, RemoteOperationResult downloadResult) {
 452         mNotificationManager.cancel(R.string.downloader_download_in_progress_ticker);
 453         if (!downloadResult.isCancelled()) {
 454             int tickerId = (downloadResult.isSuccess()) ? R.string.downloader_download_succeeded_ticker : R.string.downloader_download_failed_ticker;
 455             int contentId = (downloadResult.isSuccess()) ? R.string.downloader_download_succeeded_content : R.string.downloader_download_failed_content;
 456             Notification finalNotification = new Notification(DisplayUtils.getSeasonalIconId(), getString(tickerId), System.currentTimeMillis());
 457             finalNotification.flags |= Notification.FLAG_AUTO_CANCEL;
 458             boolean needsToUpdateCredentials = (downloadResult.getCode() == ResultCode.UNAUTHORIZED ||
 459                                                 // (downloadResult.isTemporalRedirection() && downloadResult.isIdPRedirection()
 460                                                   (downloadResult.isIdPRedirection()
 461                                                         && mDownloadClient.getCredentials() == null));
 462                                                         //&& MainApp.getAuthTokenTypeSamlSessionCookie().equals(mDownloadClient.getAuthTokenType())));
 463             if (needsToUpdateCredentials) {
 464                 // let the user update credentials with one click
 465                 Intent updateAccountCredentials = new Intent(this, AuthenticatorActivity.class);
 466                 updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACCOUNT, download.getAccount());
 467                 updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ENFORCED_UPDATE, true);
 468                 updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACTION, AuthenticatorActivity.ACTION_UPDATE_TOKEN);
 469                 updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 470                 updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
 471                 updateAccountCredentials.addFlags(Intent.FLAG_FROM_BACKGROUND);
 472                 finalNotification.contentIntent = PendingIntent.getActivity(this, (int)System.currentTimeMillis(), updateAccountCredentials, PendingIntent.FLAG_ONE_SHOT);
 473                 finalNotification.setLatestEventInfo(   getApplicationContext(),
 474                                                         getString(tickerId),
 475                                                         String.format(getString(contentId), new File(download.getSavePath()).getName()),
 476                                                         finalNotification.contentIntent);
 477                 mDownloadClient = null;   // grant that future retries on the same account will get the fresh credentials
 478
 479             } else {
 480                 Intent showDetailsIntent = null;
 481                 if (downloadResult.isSuccess()) {
 482                     if (PreviewImageFragment.canBePreviewed(download.getFile())) {
 483                         showDetailsIntent = new Intent(this, PreviewImageActivity.class);
 484                     } else {
 485                         showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 486                     }
 487                     showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, download.getFile());
 488                     showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, download.getAccount());
 489                     showDetailsIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 490
 491                 } else {
 492                     // TODO put something smart in showDetailsIntent
 493                     showDetailsIntent = new Intent();
 494                 }
 495                 finalNotification.contentIntent = PendingIntent.getActivity(getApplicationContext(), (int)System.currentTimeMillis(), showDetailsIntent, 0);
 496                 finalNotification.setLatestEventInfo(getApplicationContext(), getString(tickerId), String.format(getString(contentId), new File(download.getSavePath()).getName()), finalNotification.contentIntent);
 497             }
 498             mNotificationManager.notify(tickerId, finalNotification);
 499         }
 500     }
 501
 502
 503     /**
 504      * Sends a broadcast when a download finishes in order to the interested activities can update their view
 505      *
 506      * @param download          Finished download operation
 507      * @param downloadResult    Result of the download operation
 508      */
 509     private void sendBroadcastDownloadFinished(DownloadFileOperation download, RemoteOperationResult downloadResult) {
 510         Intent end = new Intent(getDownloadFinishMessage());
 511         end.putExtra(EXTRA_DOWNLOAD_RESULT, downloadResult.isSuccess());
 512         end.putExtra(ACCOUNT_NAME, download.getAccount().name);
 513         end.putExtra(EXTRA_REMOTE_PATH, download.getRemotePath());
 514         end.putExtra(EXTRA_FILE_PATH, download.getSavePath());
 515         sendStickyBroadcast(end);
 516     }
 517
 518
 519     /**
 520      * Sends a broadcast when a new download is added to the queue.
 521      *
 522      * @param download          Added download operation
 523      */
 524     private void sendBroadcastNewDownload(DownloadFileOperation download) {
 525         Intent added = new Intent(getDownloadAddedMessage());
 526         added.putExtra(ACCOUNT_NAME, download.getAccount().name);
 527         added.putExtra(EXTRA_REMOTE_PATH, download.getRemotePath());
 528         added.putExtra(EXTRA_FILE_PATH, download.getSavePath());
 529         sendStickyBroadcast(added);
 530     }
 531
 532 }