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.ArrayList;
  25 import java.util.HashMap;
  26 import java.util.Iterator;
  27 import java.util.Map;
  28 import java.util.Vector;
  29 import java.util.concurrent.ConcurrentHashMap;
  30 import java.util.concurrent.ConcurrentMap;
  31
  32 import com.owncloud.android.R;
  33 import com.owncloud.android.authentication.AuthenticatorActivity;
  34 import com.owncloud.android.datamodel.FileDataStorageManager;
  35 import com.owncloud.android.datamodel.OCFile;
  36
  37 import com.owncloud.android.lib.common.network.OnDatatransferProgressListener;
  38 import com.owncloud.android.lib.common.OwnCloudAccount;
  39 import com.owncloud.android.lib.common.OwnCloudClient;
  40 import com.owncloud.android.lib.common.OwnCloudClientManagerFactory;
  41 import com.owncloud.android.notifications.NotificationBuilderWithProgressBar;
  42 import com.owncloud.android.notifications.NotificationDelayer;
  43 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  44 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  45 import com.owncloud.android.lib.common.utils.Log_OC;
  46 import com.owncloud.android.lib.resources.files.FileUtils;
  47 import com.owncloud.android.operations.DownloadFileOperation;
  48 import com.owncloud.android.ui.activity.FileActivity;
  49 import com.owncloud.android.ui.activity.FileDisplayActivity;
  50 import com.owncloud.android.ui.preview.PreviewImageActivity;
  51 import com.owncloud.android.ui.preview.PreviewImageFragment;
  52 import com.owncloud.android.utils.ErrorMessageAdapter;
  53
  54 import android.accounts.Account;
  55 import android.accounts.AccountsException;
  56 import android.app.NotificationManager;
  57 import android.app.PendingIntent;
  58 import android.app.Service;
  59 import android.content.Intent;
  60 import android.os.Binder;
  61 import android.os.Handler;
  62 import android.os.HandlerThread;
  63 import android.os.IBinder;
  64 import android.os.Looper;
  65 import android.os.Message;
  66 import android.os.Process;
  67 import android.support.v4.app.NotificationCompat;
  68
  69 public class FileDownloader extends Service implements OnDatatransferProgressListener {
  70
  71     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  72     public static final String EXTRA_FILE = "FILE";
  73
  74     public static final String ACTION_CANCEL_FILE_DOWNLOAD = "CANCEL_FILE_DOWNLOAD";
  75
  76     private static final String DOWNLOAD_ADDED_MESSAGE = "DOWNLOAD_ADDED";
  77     private static final String DOWNLOAD_FINISH_MESSAGE = "DOWNLOAD_FINISH";
  78     public static final String EXTRA_DOWNLOAD_RESULT = "RESULT";
  79     public static final String EXTRA_FILE_PATH = "FILE_PATH";
  80     public static final String EXTRA_REMOTE_PATH = "REMOTE_PATH";
  81     public static final String ACCOUNT_NAME = "ACCOUNT_NAME";
  82
  83     private static final String TAG = "FileDownloader";
  84
  85     private Looper mServiceLooper;
  86     private ServiceHandler mServiceHandler;
  87     private IBinder mBinder;
  88     private OwnCloudClient mDownloadClient = null;
  89     private Account mLastAccount = null;
  90     private FileDataStorageManager mStorageManager;
  91
  92     private ConcurrentMap<String, DownloadFileOperation> mPendingDownloads = new ConcurrentHashMap<String, DownloadFileOperation>();
  93     private DownloadFileOperation mCurrentDownload = null;
  94
  95     private NotificationManager mNotificationManager;
  96     private NotificationCompat.Builder mNotificationBuilder;
  97     private int mLastPercent;
  98
  99
 100     public static String getDownloadAddedMessage() {
 101         return FileDownloader.class.getName().toString() + DOWNLOAD_ADDED_MESSAGE;
 102     }
 103
 104     public static String getDownloadFinishMessage() {
 105         return FileDownloader.class.getName().toString() + DOWNLOAD_FINISH_MESSAGE;
 106     }
 107
 108     /**
 109      * Builds a key for mPendingDownloads from the account and file to download
 110      *
 111      * @param account   Account where the file to download is stored
 112      * @param file      File to download
 113      */
 114     private String buildRemoteName(Account account, OCFile file) {
 115         return account.name + file.getRemotePath();
 116     }
 117
 118
 119     /**
 120      * Service initialization
 121      */
 122     @Override
 123     public void onCreate() {
 124         super.onCreate();
 125         mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
 126         HandlerThread thread = new HandlerThread("FileDownloaderThread",
 127                 Process.THREAD_PRIORITY_BACKGROUND);
 128         thread.start();
 129         mServiceLooper = thread.getLooper();
 130         mServiceHandler = new ServiceHandler(mServiceLooper, this);
 131         mBinder = new FileDownloaderBinder();
 132     }
 133
 134     /**
 135      * Entry point to add one or several files to the queue of downloads.
 136      *
 137      * New downloads are added calling to startService(), resulting in a call to this method. This ensures the service will keep on working
 138      * although the caller activity goes away.
 139      */
 140     @Override
 141     public int onStartCommand(Intent intent, int flags, int startId) {
 142         if (    !intent.hasExtra(EXTRA_ACCOUNT) ||
 143                 !intent.hasExtra(EXTRA_FILE)
 144                 /*!intent.hasExtra(EXTRA_FILE_PATH) ||
 145                 !intent.hasExtra(EXTRA_REMOTE_PATH)*/
 146            ) {
 147             Log_OC.e(TAG, "Not enough information provided in intent");
 148             return START_NOT_STICKY;
 149         } else {
 150             final Account account = intent.getParcelableExtra(EXTRA_ACCOUNT);
 151             final OCFile file = intent.getParcelableExtra(EXTRA_FILE);
 152
 153             if (ACTION_CANCEL_FILE_DOWNLOAD.equals(intent.getAction())) {
 154
 155                 new Thread(new Runnable() {
 156                     public void run() {
 157                         // Cancel the download
 158                         cancel(account, file);
 159                     }
 160                 }).start();
 161
 162             } else {
 163
 164                 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)
 165                 String downloadKey = buildRemoteName(account, file);
 166                 try {
 167                     DownloadFileOperation newDownload = new DownloadFileOperation(account, file);
 168                     mPendingDownloads.putIfAbsent(downloadKey, newDownload);
 169                     newDownload.addDatatransferProgressListener(this);
 170                     newDownload.addDatatransferProgressListener((FileDownloaderBinder) mBinder);
 171                     requestedDownloads.add(downloadKey);
 172
 173                     // Store file on db with state 'downloading'
 174                     FileDataStorageManager storageManager = new FileDataStorageManager(account, getContentResolver());
 175                     file.setDownloading(true);
 176                     storageManager.saveFile(file);
 177
 178                     sendBroadcastNewDownload(newDownload);
 179
 180                 } catch (IllegalArgumentException e) {
 181                     Log_OC.e(TAG, "Not enough information provided in intent: " + e.getMessage());
 182                     return START_NOT_STICKY;
 183                 }
 184
 185                 if (requestedDownloads.size() > 0) {
 186                     Message msg = mServiceHandler.obtainMessage();
 187                     msg.arg1 = startId;
 188                     msg.obj = requestedDownloads;
 189                     mServiceHandler.sendMessage(msg);
 190                 }
 191             }
 192         }
 193
 194         return START_NOT_STICKY;
 195     }
 196
 197
 198     /**
 199      * Provides a binder object that clients can use to perform operations on the queue of downloads, excepting the addition of new files.
 200      *
 201      * Implemented to perform cancellation, pause and resume of existing downloads.
 202      */
 203     @Override
 204     public IBinder onBind(Intent arg0) {
 205         return mBinder;
 206     }
 207
 208
 209     /**
 210      * Called when ALL the bound clients were onbound.
 211      */
 212     @Override
 213     public boolean onUnbind(Intent intent) {
 214         ((FileDownloaderBinder)mBinder).clearListeners();
 215         return false;   // not accepting rebinding (default behaviour)
 216     }
 217
 218
 219     /**
 220      *  Binder to let client components to perform operations on the queue of downloads.
 221      *
 222      *  It provides by itself the available operations.
 223      */
 224     public class FileDownloaderBinder extends Binder implements OnDatatransferProgressListener {
 225
 226         /**
 227          * Map of listeners that will be reported about progress of downloads from a {@link FileDownloaderBinder} instance
 228          */
 229         private Map<String, OnDatatransferProgressListener> mBoundListeners = new HashMap<String, OnDatatransferProgressListener>();
 230
 231
 232         /**
 233          * Cancels a pending or current download of a remote file.
 234          *
 235          * @param account       Owncloud account where the remote file is stored.
 236          * @param file          A file in the queue of pending downloads
 237          */
 238         public void cancel(Account account, OCFile file) {
 239             DownloadFileOperation download = null;
 240             synchronized (mPendingDownloads) {
 241                 download = mPendingDownloads.remove(buildRemoteName(account, file));
 242             }
 243             if (download != null) {
 244                 download.cancel();
 245             }
 246         }
 247
 248
 249         public void clearListeners() {
 250             mBoundListeners.clear();
 251         }
 252
 253
 254         /**
 255          * Returns True when the file described by 'file' in the ownCloud account 'account' is downloading or waiting to download.
 256          *
 257          * If 'file' is a directory, returns 'true' if some of its descendant files is downloading or waiting to download.
 258          *
 259          * @param account       Owncloud account where the remote file is stored.
 260          * @param file          A file that could be in the queue of downloads.
 261          */
 262         public boolean isDownloading(Account account, OCFile file) {
 263             if (account == null || file == null) return false;
 264             String targetKey = buildRemoteName(account, file);
 265             synchronized (mPendingDownloads) {
 266                 if (file.isFolder()) {
 267                     // this can be slow if there are many downloads :(
 268                     Iterator<String> it = mPendingDownloads.keySet().iterator();
 269                     boolean found = false;
 270                     while (it.hasNext() && !found) {
 271                         found = it.next().startsWith(targetKey);
 272                     }
 273                     return found;
 274                 } else {
 275                     return (mPendingDownloads.containsKey(targetKey));
 276                 }
 277             }
 278         }
 279
 280
 281         /**
 282          * Adds a listener interested in the progress of the download for a concrete file.
 283          *
 284          * @param listener      Object to notify about progress of transfer.
 285          * @param account       ownCloud account holding the file of interest.
 286          * @param file          {@link OCfile} of interest for listener.
 287          */
 288         public void addDatatransferProgressListener (OnDatatransferProgressListener listener, Account account, OCFile file) {
 289             if (account == null || file == null || listener == null) return;
 290             String targetKey = buildRemoteName(account, file);
 291             mBoundListeners.put(targetKey, listener);
 292         }
 293
 294
 295         /**
 296          * Removes a listener interested in the progress of the download for a concrete file.
 297          *
 298          * @param listener      Object to notify about progress of transfer.
 299          * @param account       ownCloud account holding the file of interest.
 300          * @param file          {@link OCfile} of interest for listener.
 301          */
 302         public void removeDatatransferProgressListener (OnDatatransferProgressListener listener, Account account, OCFile file) {
 303             if (account == null || file == null || listener == null) return;
 304             String targetKey = buildRemoteName(account, file);
 305             if (mBoundListeners.get(targetKey) == listener) {
 306                 mBoundListeners.remove(targetKey);
 307             }
 308         }
 309
 310         @Override
 311         public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer,
 312                 String fileName) {
 313             String key = buildRemoteName(mCurrentDownload.getAccount(), mCurrentDownload.getFile());
 314             OnDatatransferProgressListener boundListener = mBoundListeners.get(key);
 315             if (boundListener != null) {
 316                 boundListener.onTransferProgress(progressRate, totalTransferredSoFar, totalToTransfer, fileName);
 317             }
 318         }
 319
 320     }
 321
 322
 323     /**
 324      * Download worker. Performs the pending downloads in the order they were requested.
 325      *
 326      * Created with the Looper of a new thread, started in {@link FileUploader#onCreate()}.
 327      */
 328     private static class ServiceHandler extends Handler {
 329         // don't make it a final class, and don't remove the static ; lint will warn about a possible memory leak
 330         FileDownloader mService;
 331         public ServiceHandler(Looper looper, FileDownloader service) {
 332             super(looper);
 333             if (service == null)
 334                 throw new IllegalArgumentException("Received invalid NULL in parameter 'service'");
 335             mService = service;
 336         }
 337
 338         @Override
 339         public void handleMessage(Message msg) {
 340             @SuppressWarnings("unchecked")
 341             AbstractList<String> requestedDownloads = (AbstractList<String>) msg.obj;
 342             if (msg.obj != null) {
 343                 Iterator<String> it = requestedDownloads.iterator();
 344                 while (it.hasNext()) {
 345                     mService.downloadFile(it.next());
 346                 }
 347             }
 348             mService.stopSelf(msg.arg1);
 349         }
 350     }
 351
 352
 353     /**
 354      * Core download method: requests a file to download and stores it.
 355      *
 356      * @param downloadKey   Key to access the download to perform, contained in mPendingDownloads
 357      */
 358     private void downloadFile(String downloadKey) {
 359
 360         synchronized(mPendingDownloads) {
 361             mCurrentDownload = mPendingDownloads.get(downloadKey);
 362         }
 363
 364         if (mCurrentDownload != null) {
 365
 366             notifyDownloadStart(mCurrentDownload);
 367
 368             RemoteOperationResult downloadResult = null;
 369             try {
 370                 /// prepare client object to send the request to the ownCloud server
 371                 if (mDownloadClient == null || !mLastAccount.equals(mCurrentDownload.getAccount())) {
 372                     mLastAccount = mCurrentDownload.getAccount();
 373                     mStorageManager =
 374                             new FileDataStorageManager(mLastAccount, getContentResolver());
 375                     OwnCloudAccount ocAccount = new OwnCloudAccount(mLastAccount, this);
 376                     mDownloadClient = OwnCloudClientManagerFactory.getDefaultSingleton().
 377                             getClientFor(ocAccount, this);
 378                 }
 379
 380                 /// perform the download
 381                 downloadResult = mCurrentDownload.execute(mDownloadClient);
 382                 if (downloadResult.isSuccess()) {
 383                     saveDownloadedFile();
 384                 }
 385
 386             } catch (AccountsException e) {
 387                 Log_OC.e(TAG, "Error while trying to get autorization for " + mLastAccount.name, e);
 388                 downloadResult = new RemoteOperationResult(e);
 389             } catch (IOException e) {
 390                 Log_OC.e(TAG, "Error while trying to get autorization for " + mLastAccount.name, e);
 391                 downloadResult = new RemoteOperationResult(e);
 392
 393             } finally {
 394                 synchronized(mPendingDownloads) {
 395                     mPendingDownloads.remove(downloadKey);
 396                 }
 397             }
 398
 399
 400             /// notify result
 401             notifyDownloadResult(mCurrentDownload, downloadResult);
 402
 403             sendBroadcastDownloadFinished(mCurrentDownload, downloadResult);
 404         }
 405     }
 406
 407
 408     /**
 409      * Updates the OC File after a successful download.
 410      */
 411     private void saveDownloadedFile() {
 412         OCFile file = mStorageManager.getFileById(mCurrentDownload.getFile().getFileId());
 413         long syncDate = System.currentTimeMillis();
 414         file.setLastSyncDateForProperties(syncDate);
 415         file.setLastSyncDateForData(syncDate);
 416         file.setNeedsUpdateThumbnail(true);
 417         file.setModificationTimestamp(mCurrentDownload.getModificationTimestamp());
 418         file.setModificationTimestampAtLastSyncForData(mCurrentDownload.getModificationTimestamp());
 419         // file.setEtag(mCurrentDownload.getEtag());    // TODO Etag, where available
 420         file.setMimetype(mCurrentDownload.getMimeType());
 421         file.setStoragePath(mCurrentDownload.getSavePath());
 422         file.setFileLength((new File(mCurrentDownload.getSavePath()).length()));
 423         file.setRemoteId(mCurrentDownload.getFile().getRemoteId());
 424         file.setDownloading(false);
 425         mStorageManager.saveFile(file);
 426         mStorageManager.triggerMediaScan(file.getStoragePath());
 427     }
 428
 429
 430     /**
 431      * Creates a status notification to show the download progress
 432      *
 433      * @param download  Download operation starting.
 434      */
 435     private void notifyDownloadStart(DownloadFileOperation download) {
 436         /// create status notification with a progress bar
 437         mLastPercent = 0;
 438         mNotificationBuilder =
 439                 NotificationBuilderWithProgressBar.newNotificationBuilderWithProgressBar(this);
 440         mNotificationBuilder
 441                 .setSmallIcon(R.drawable.notification_icon)
 442                 .setTicker(getString(R.string.downloader_download_in_progress_ticker))
 443                 .setContentTitle(getString(R.string.downloader_download_in_progress_ticker))
 444                 .setOngoing(true)
 445                 .setProgress(100, 0, download.getSize() < 0)
 446                 .setContentText(
 447                         String.format(getString(R.string.downloader_download_in_progress_content), 0,
 448                                 new File(download.getSavePath()).getName())
 449                 );
 450
 451         /// includes a pending intent in the notification showing the details view of the file
 452         Intent showDetailsIntent = null;
 453         if (PreviewImageFragment.canBePreviewed(download.getFile())) {
 454             showDetailsIntent = new Intent(this, PreviewImageActivity.class);
 455         } else {
 456             showDetailsIntent = new Intent(this, FileDisplayActivity.class);
 457         }
 458         showDetailsIntent.putExtra(FileActivity.EXTRA_FILE, download.getFile());
 459         showDetailsIntent.putExtra(FileActivity.EXTRA_ACCOUNT, download.getAccount());
 460         showDetailsIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 461
 462         mNotificationBuilder.setContentIntent(PendingIntent.getActivity(
 463             this, (int) System.currentTimeMillis(), showDetailsIntent, 0
 464         ));
 465
 466         mNotificationManager.notify(R.string.downloader_download_in_progress_ticker, mNotificationBuilder.build());
 467     }
 468
 469
 470     /**
 471      * Callback method to update the progress bar in the status notification.
 472      */
 473     @Override
 474     public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer, String filePath) {
 475         int percent = (int)(100.0*((double)totalTransferredSoFar)/((double)totalToTransfer));
 476         if (percent != mLastPercent) {
 477             mNotificationBuilder.setProgress(100, percent, totalToTransfer < 0);
 478             String fileName = filePath.substring(filePath.lastIndexOf(FileUtils.PATH_SEPARATOR) + 1);
 479             String text = String.format(getString(R.string.downloader_download_in_progress_content), percent, fileName);
 480             mNotificationBuilder.setContentText(text);
 481             mNotificationManager.notify(R.string.downloader_download_in_progress_ticker, mNotificationBuilder.build());
 482         }
 483         mLastPercent = percent;
 484     }
 485
 486
 487     /**
 488      * Updates the status notification with the result of a download operation.
 489      *
 490      * @param downloadResult    Result of the download operation.
 491      * @param download          Finished download operation
 492      */
 493     private void notifyDownloadResult(DownloadFileOperation download, RemoteOperationResult downloadResult) {
 494         mNotificationManager.cancel(R.string.downloader_download_in_progress_ticker);
 495         if (!downloadResult.isCancelled()) {
 496             int tickerId = (downloadResult.isSuccess()) ? R.string.downloader_download_succeeded_ticker :
 497                 R.string.downloader_download_failed_ticker;
 498
 499             boolean needsToUpdateCredentials = (
 500                     downloadResult.getCode() == ResultCode.UNAUTHORIZED ||
 501                     downloadResult.isIdPRedirection()
 502             );
 503             tickerId = (needsToUpdateCredentials) ?
 504                     R.string.downloader_download_failed_credentials_error : tickerId;
 505
 506             mNotificationBuilder
 507             .setTicker(getString(tickerId))
 508             .setContentTitle(getString(tickerId))
 509             .setAutoCancel(true)
 510             .setOngoing(false)
 511             .setProgress(0, 0, false);
 512
 513             if (needsToUpdateCredentials) {
 514
 515                 // let the user update credentials with one click
 516                 Intent updateAccountCredentials = new Intent(this, AuthenticatorActivity.class);
 517                 updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACCOUNT, download.getAccount());
 518                 updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACTION, AuthenticatorActivity.ACTION_UPDATE_EXPIRED_TOKEN);
 519                 updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 520                 updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
 521                 updateAccountCredentials.addFlags(Intent.FLAG_FROM_BACKGROUND);
 522                 mNotificationBuilder
 523                     .setContentIntent(PendingIntent.getActivity(
 524                         this, (int) System.currentTimeMillis(), updateAccountCredentials, PendingIntent.FLAG_ONE_SHOT));
 525
 526                 mDownloadClient = null;   // grant that future retries on the same account will get the fresh credentials
 527
 528             } else {
 529                 // TODO put something smart in showDetailsIntent
 530                 Intent   showDetailsIntent = new Intent();
 531                 mNotificationBuilder
 532                     .setContentIntent(PendingIntent.getActivity(
 533                         this, (int) System.currentTimeMillis(), showDetailsIntent, 0));
 534             }
 535
 536             mNotificationBuilder.setContentText(ErrorMessageAdapter.getErrorCauseMessage(downloadResult, download, getResources()));
 537             mNotificationManager.notify(tickerId, mNotificationBuilder.build());
 538
 539             // Remove success notification
 540             if (downloadResult.isSuccess()) {
 541                 // Sleep 2 seconds, so show the notification before remove it
 542                 NotificationDelayer.cancelWithDelay(
 543                         mNotificationManager,
 544                         R.string.downloader_download_succeeded_ticker,
 545                         2000);
 546             }
 547
 548         }
 549     }
 550
 551
 552     /**
 553      * Sends a broadcast when a download finishes in order to the interested activities can update their view
 554      *
 555      * @param download          Finished download operation
 556      * @param downloadResult    Result of the download operation
 557      */
 558     private void sendBroadcastDownloadFinished(DownloadFileOperation download, RemoteOperationResult downloadResult) {
 559         Intent end = new Intent(getDownloadFinishMessage());
 560         end.putExtra(EXTRA_DOWNLOAD_RESULT, downloadResult.isSuccess());
 561         end.putExtra(ACCOUNT_NAME, download.getAccount().name);
 562         end.putExtra(EXTRA_REMOTE_PATH, download.getRemotePath());
 563         end.putExtra(EXTRA_FILE_PATH, download.getSavePath());
 564         sendStickyBroadcast(end);
 565     }
 566
 567
 568     /**
 569      * Sends a broadcast when a new download is added to the queue.
 570      *
 571      * @param download          Added download operation
 572      */
 573     private void sendBroadcastNewDownload(DownloadFileOperation download) {
 574         Intent added = new Intent(getDownloadAddedMessage());
 575         added.putExtra(ACCOUNT_NAME, download.getAccount().name);
 576         added.putExtra(EXTRA_REMOTE_PATH, download.getRemotePath());
 577         added.putExtra(EXTRA_FILE_PATH, download.getSavePath());
 578         sendStickyBroadcast(added);
 579     }
 580
 581     /**
 582      * Cancel operation
 583      * @param account       Owncloud account where the remote file is stored.
 584      * @param file          File OCFile
 585      */
 586     public void cancel(Account account, OCFile file){
 587         DownloadFileOperation download = null;
 588         String targetKey = buildRemoteName(account, file);
 589         ArrayList<String> keyItems = new ArrayList<String>();
 590         synchronized (mPendingDownloads) {
 591             if (file.isFolder()) {
 592                 Log_OC.d(TAG, "Folder download. Canceling pending downloads (from folder)");
 593                 Iterator<String> it = mPendingDownloads.keySet().iterator();
 594                 boolean found = false;
 595                 while (it.hasNext()) {
 596                     String keyDownloadOperation = it.next();
 597                     found = keyDownloadOperation.startsWith(targetKey);
 598                     if (found) {
 599                         keyItems.add(keyDownloadOperation);
 600                     }
 601                 }
 602             } else {
 603                 // this is not really expected...
 604                 Log_OC.d(TAG, "Canceling file download");
 605                 keyItems.add(buildRemoteName(account, file));
 606             }
 607         }
 608         for (String item: keyItems) {
 609             download = mPendingDownloads.remove(item);
 610             Log_OC.d(TAG, "Key removed: " + item);
 611
 612             if (download != null) {
 613                 download.cancel();
 614             }
 615         }
 616     }
 617 }