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