1package eu.siacs.conversations.persistance;
  2
  3import android.annotation.TargetApi;
  4import android.content.ContentResolver;
  5import android.content.Context;
  6import android.content.Intent;
  7import android.database.Cursor;
  8import android.graphics.Bitmap;
  9import android.graphics.BitmapFactory;
 10import android.graphics.Canvas;
 11import android.graphics.Matrix;
 12import android.graphics.RectF;
 13import android.net.Uri;
 14import android.os.Build;
 15import android.os.Environment;
 16import android.os.ParcelFileDescriptor;
 17import android.provider.MediaStore;
 18import android.provider.OpenableColumns;
 19import android.system.Os;
 20import android.system.StructStat;
 21import android.util.Base64;
 22import android.util.Base64OutputStream;
 23import android.util.Log;
 24import android.util.LruCache;
 25import android.webkit.MimeTypeMap;
 26
 27import java.io.ByteArrayOutputStream;
 28import java.io.Closeable;
 29import java.io.File;
 30import java.io.FileDescriptor;
 31import java.io.FileInputStream;
 32import java.io.FileNotFoundException;
 33import java.io.FileOutputStream;
 34import java.io.IOException;
 35import java.io.InputStream;
 36import java.io.OutputStream;
 37import java.net.Socket;
 38import java.net.URL;
 39import java.security.DigestOutputStream;
 40import java.security.MessageDigest;
 41import java.security.NoSuchAlgorithmException;
 42import java.text.SimpleDateFormat;
 43import java.util.Date;
 44import java.util.List;
 45import java.util.Locale;
 46
 47import eu.siacs.conversations.Config;
 48import eu.siacs.conversations.R;
 49import eu.siacs.conversations.entities.DownloadableFile;
 50import eu.siacs.conversations.entities.Message;
 51import eu.siacs.conversations.services.XmppConnectionService;
 52import eu.siacs.conversations.utils.CryptoHelper;
 53import eu.siacs.conversations.utils.ExifHelper;
 54import eu.siacs.conversations.utils.FileUtils;
 55import eu.siacs.conversations.xmpp.pep.Avatar;
 56
 57public class FileBackend {
 58	private final SimpleDateFormat imageDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
 59
 60	private XmppConnectionService mXmppConnectionService;
 61
 62	public FileBackend(XmppConnectionService service) {
 63		this.mXmppConnectionService = service;
 64	}
 65
 66	private void createNoMedia() {
 67		final File nomedia = new File(getConversationsFileDirectory()+".nomedia");
 68		if (!nomedia.exists()) {
 69			try {
 70				nomedia.createNewFile();
 71			} catch (Exception e) {
 72				Log.d(Config.LOGTAG, "could not create nomedia file");
 73			}
 74		}
 75	}
 76
 77	public void updateMediaScanner(File file) {
 78		if (file.getAbsolutePath().startsWith(getConversationsImageDirectory())) {
 79			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 80			intent.setData(Uri.fromFile(file));
 81			mXmppConnectionService.sendBroadcast(intent);
 82		} else {
 83			createNoMedia();
 84		}
 85	}
 86
 87	public boolean deleteFile(Message message) {
 88		File file = getFile(message);
 89		if (file.delete()) {
 90			updateMediaScanner(file);
 91			return true;
 92		} else {
 93			return false;
 94		}
 95	}
 96
 97	public DownloadableFile getFile(Message message) {
 98		return getFile(message, true);
 99	}
100
101	public DownloadableFile getFile(Message message, boolean decrypted) {
102		final boolean encrypted = !decrypted
103				&& (message.getEncryption() == Message.ENCRYPTION_PGP
104				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
105		final DownloadableFile file;
106		String path = message.getRelativeFilePath();
107		if (path == null) {
108			path = message.getUuid();
109		}
110		if (path.startsWith("/")) {
111			file = new DownloadableFile(path);
112		} else {
113			String mime = message.getMimeType();
114			if (mime != null && mime.startsWith("image")) {
115				file = new DownloadableFile(getConversationsImageDirectory() + path);
116			} else {
117				file = new DownloadableFile(getConversationsFileDirectory() + path);
118			}
119		}
120		if (encrypted) {
121			return new DownloadableFile(getConversationsFileDirectory() + file.getName() + ".pgp");
122		} else {
123			return file;
124		}
125	}
126
127	private static long getFileSize(Context context, Uri uri) {
128		Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
129		if (cursor != null && cursor.moveToFirst()) {
130			return cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
131		} else {
132			return -1;
133		}
134	}
135
136	public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
137		if (max <= 0) {
138			Log.d(Config.LOGTAG,"server did not report max file size for http upload");
139			return true; //exception to be compatible with HTTP Upload < v0.2
140		}
141		for(Uri uri : uris) {
142			if (FileBackend.getFileSize(context, uri) > max) {
143				Log.d(Config.LOGTAG,"not all files are under "+max+" bytes. suggesting falling back to jingle");
144				return false;
145			}
146		}
147		return true;
148	}
149
150	public static String getConversationsFileDirectory() {
151		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Conversations/";
152	}
153
154	public static String getConversationsImageDirectory() {
155		return Environment.getExternalStoragePublicDirectory(
156				Environment.DIRECTORY_PICTURES).getAbsolutePath()
157			+ "/Conversations/";
158	}
159
160	public Bitmap resize(Bitmap originalBitmap, int size) {
161		int w = originalBitmap.getWidth();
162		int h = originalBitmap.getHeight();
163		if (Math.max(w, h) > size) {
164			int scalledW;
165			int scalledH;
166			if (w <= h) {
167				scalledW = (int) (w / ((double) h / size));
168				scalledH = size;
169			} else {
170				scalledW = size;
171				scalledH = (int) (h / ((double) w / size));
172			}
173			Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
174			if (originalBitmap != null && !originalBitmap.isRecycled()) {
175				originalBitmap.recycle();
176			}
177			return result;
178		} else {
179			return originalBitmap;
180		}
181	}
182
183	public static Bitmap rotate(Bitmap bitmap, int degree) {
184		if (degree == 0) {
185			return bitmap;
186		}
187		int w = bitmap.getWidth();
188		int h = bitmap.getHeight();
189		Matrix mtx = new Matrix();
190		mtx.postRotate(degree);
191		Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
192		if (bitmap != null && !bitmap.isRecycled()) {
193			bitmap.recycle();
194		}
195		return result;
196	}
197
198	public boolean useImageAsIs(Uri uri) {
199		String path = getOriginalPath(uri);
200		if (path == null) {
201			return false;
202		}
203		File file = new File(path);
204		long size = file.length();
205		if (size == 0 || size >= Config.IMAGE_MAX_SIZE ) {
206			return false;
207		}
208		BitmapFactory.Options options = new BitmapFactory.Options();
209		options.inJustDecodeBounds = true;
210		try {
211			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
212			if (options == null || options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
213				return false;
214			}
215			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
216		} catch (FileNotFoundException e) {
217			return false;
218		}
219	}
220
221	public String getOriginalPath(Uri uri) {
222		return FileUtils.getPath(mXmppConnectionService,uri);
223	}
224
225	public void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
226		file.getParentFile().mkdirs();
227		OutputStream os = null;
228		InputStream is = null;
229		try {
230			file.createNewFile();
231			os = new FileOutputStream(file);
232			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
233			byte[] buffer = new byte[1024];
234			int length;
235			while ((length = is.read(buffer)) > 0) {
236				os.write(buffer, 0, length);
237			}
238			os.flush();
239		} catch(FileNotFoundException e) {
240			throw new FileCopyException(R.string.error_file_not_found);
241		} catch (IOException e) {
242			e.printStackTrace();
243			throw new FileCopyException(R.string.error_io_exception);
244		} finally {
245			close(os);
246			close(is);
247		}
248		Log.d(Config.LOGTAG, "output file name " + file.getAbsolutePath());
249	}
250
251	public void copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
252		String mime = mXmppConnectionService.getContentResolver().getType(uri);
253		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime="+mime+")");
254		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
255		if (extension == null) {
256			extension = getExtensionFromUri(uri);
257		}
258		message.setRelativeFilePath(message.getUuid() + "." + extension);
259		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
260	}
261
262	private String getExtensionFromUri(Uri uri) {
263		String[] projection = {MediaStore.MediaColumns.DATA};
264		String filename = null;
265		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
266		if (cursor != null) {
267			try {
268				if (cursor.moveToFirst()) {
269					filename = cursor.getString(0);
270				}
271			} finally {
272				cursor.close();
273			}
274		}
275		int pos = filename == null ? -1 : filename.lastIndexOf('.');
276		return pos > 0 ? filename.substring(pos+1) : null;
277	}
278
279	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
280		file.getParentFile().mkdirs();
281		InputStream is = null;
282		OutputStream os = null;
283		try {
284			file.createNewFile();
285			is = mXmppConnectionService.getContentResolver().openInputStream(image);
286			Bitmap originalBitmap;
287			BitmapFactory.Options options = new BitmapFactory.Options();
288			int inSampleSize = (int) Math.pow(2, sampleSize);
289			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
290			options.inSampleSize = inSampleSize;
291			originalBitmap = BitmapFactory.decodeStream(is, null, options);
292			is.close();
293			if (originalBitmap == null) {
294				throw new FileCopyException(R.string.error_not_an_image_file);
295			}
296			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
297			int rotation = getRotation(image);
298			scaledBitmap = rotate(scaledBitmap, rotation);
299			boolean targetSizeReached = false;
300			int quality = Config.IMAGE_QUALITY;
301			while(!targetSizeReached) {
302				os = new FileOutputStream(file);
303				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
304				if (!success) {
305					throw new FileCopyException(R.string.error_compressing_image);
306				}
307				os.flush();
308				targetSizeReached = file.length() <= Config.IMAGE_MAX_SIZE || quality <= 50;
309				quality -= 5;
310			}
311			scaledBitmap.recycle();
312			return;
313		} catch (FileNotFoundException e) {
314			throw new FileCopyException(R.string.error_file_not_found);
315		} catch (IOException e) {
316			e.printStackTrace();
317			throw new FileCopyException(R.string.error_io_exception);
318		} catch (SecurityException e) {
319			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
320		} catch (OutOfMemoryError e) {
321			++sampleSize;
322			if (sampleSize <= 3) {
323				copyImageToPrivateStorage(file, image, sampleSize);
324			} else {
325				throw new FileCopyException(R.string.error_out_of_memory);
326			}
327		} catch (NullPointerException e) {
328			throw new FileCopyException(R.string.error_io_exception);
329		} finally {
330			close(os);
331			close(is);
332		}
333	}
334
335	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
336		copyImageToPrivateStorage(file, image, 0);
337	}
338
339	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
340		switch(Config.IMAGE_FORMAT) {
341			case JPEG:
342				message.setRelativeFilePath(message.getUuid()+".jpg");
343				break;
344			case PNG:
345				message.setRelativeFilePath(message.getUuid()+".png");
346				break;
347			case WEBP:
348				message.setRelativeFilePath(message.getUuid()+".webp");
349				break;
350		}
351		copyImageToPrivateStorage(getFile(message), image);
352		updateFileParams(message);
353	}
354
355	private int getRotation(File file) {
356		return getRotation(Uri.parse("file://"+file.getAbsolutePath()));
357	}
358
359	private int getRotation(Uri image) {
360		InputStream is = null;
361		try {
362			is = mXmppConnectionService.getContentResolver().openInputStream(image);
363			return ExifHelper.getOrientation(is);
364		} catch (FileNotFoundException e) {
365			return 0;
366		} finally {
367			close(is);
368		}
369	}
370
371	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws FileNotFoundException {
372		final String uuid = message.getUuid();
373		final LruCache<String,Bitmap> cache = mXmppConnectionService.getBitmapCache();
374		Bitmap thumbnail = cache.get(uuid);
375		if ((thumbnail == null) && (!cacheOnly)) {
376			synchronized (cache) {
377				thumbnail = cache.get(uuid);
378				if (thumbnail != null) {
379					return thumbnail;
380				}
381				File file = getFile(message);
382				BitmapFactory.Options options = new BitmapFactory.Options();
383				options.inSampleSize = calcSampleSize(file, size);
384				Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(), options);
385				if (fullsize == null) {
386					throw new FileNotFoundException();
387				}
388				thumbnail = resize(fullsize, size);
389				thumbnail = rotate(thumbnail, getRotation(file));
390				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
391			}
392		}
393		return thumbnail;
394	}
395
396	public Uri getTakePhotoUri() {
397		StringBuilder pathBuilder = new StringBuilder();
398		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
399		pathBuilder.append('/');
400		pathBuilder.append("Camera");
401		pathBuilder.append('/');
402		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date()) + ".jpg");
403		Uri uri = Uri.parse("file://" + pathBuilder.toString());
404		File file = new File(uri.toString());
405		file.getParentFile().mkdirs();
406		return uri;
407	}
408
409	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
410		try {
411			Avatar avatar = new Avatar();
412			Bitmap bm = cropCenterSquare(image, size);
413			if (bm == null) {
414				return null;
415			}
416			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
417			Base64OutputStream mBase64OutputSttream = new Base64OutputStream(
418					mByteArrayOutputStream, Base64.DEFAULT);
419			MessageDigest digest = MessageDigest.getInstance("SHA-1");
420			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
421					mBase64OutputSttream, digest);
422			if (!bm.compress(format, 75, mDigestOutputStream)) {
423				return null;
424			}
425			mDigestOutputStream.flush();
426			mDigestOutputStream.close();
427			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
428			avatar.image = new String(mByteArrayOutputStream.toByteArray());
429			return avatar;
430		} catch (NoSuchAlgorithmException e) {
431			return null;
432		} catch (IOException e) {
433			return null;
434		}
435	}
436
437	public Avatar getStoredPepAvatar(String hash) {
438		if (hash == null) {
439			return null;
440		}
441		Avatar avatar = new Avatar();
442		File file = new File(getAvatarPath(hash));
443		FileInputStream is = null;
444		try {
445			BitmapFactory.Options options = new BitmapFactory.Options();
446			options.inJustDecodeBounds = true;
447			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
448			is = new FileInputStream(file);
449			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
450			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
451			MessageDigest digest = MessageDigest.getInstance("SHA-1");
452			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
453			byte[] buffer = new byte[4096];
454			int length;
455			while ((length = is.read(buffer)) > 0) {
456				os.write(buffer, 0, length);
457			}
458			os.flush();
459			os.close();
460			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
461			avatar.image = new String(mByteArrayOutputStream.toByteArray());
462			avatar.height = options.outHeight;
463			avatar.width = options.outWidth;
464			return avatar;
465		} catch (IOException e) {
466			return null;
467		} catch (NoSuchAlgorithmException e) {
468			return null;
469		} finally {
470			close(is);
471		}
472	}
473
474	public boolean isAvatarCached(Avatar avatar) {
475		File file = new File(getAvatarPath(avatar.getFilename()));
476		return file.exists();
477	}
478
479	public boolean save(Avatar avatar) {
480		File file;
481		if (isAvatarCached(avatar)) {
482			file = new File(getAvatarPath(avatar.getFilename()));
483		} else {
484			String filename = getAvatarPath(avatar.getFilename());
485			file = new File(filename + ".tmp");
486			file.getParentFile().mkdirs();
487			OutputStream os = null;
488			try {
489				file.createNewFile();
490				os = new FileOutputStream(file);
491				MessageDigest digest = MessageDigest.getInstance("SHA-1");
492				digest.reset();
493				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
494				mDigestOutputStream.write(avatar.getImageAsBytes());
495				mDigestOutputStream.flush();
496				mDigestOutputStream.close();
497				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
498				if (sha1sum.equals(avatar.sha1sum)) {
499					file.renameTo(new File(filename));
500				} else {
501					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
502					file.delete();
503					return false;
504				}
505			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
506				return false;
507			} finally {
508				close(os);
509			}
510		}
511		avatar.size = file.length();
512		return true;
513	}
514
515	public String getAvatarPath(String avatar) {
516		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
517	}
518
519	public Uri getAvatarUri(String avatar) {
520		return Uri.parse("file:" + getAvatarPath(avatar));
521	}
522
523	public Bitmap cropCenterSquare(Uri image, int size) {
524		if (image == null) {
525			return null;
526		}
527		InputStream is = null;
528		try {
529			BitmapFactory.Options options = new BitmapFactory.Options();
530			options.inSampleSize = calcSampleSize(image, size);
531			is = mXmppConnectionService.getContentResolver().openInputStream(image);
532			if (is == null) {
533				return null;
534			}
535			Bitmap input = BitmapFactory.decodeStream(is, null, options);
536			if (input == null) {
537				return null;
538			} else {
539				input = rotate(input, getRotation(image));
540				return cropCenterSquare(input, size);
541			}
542		} catch (SecurityException e) {
543			return null; // happens for example on Android 6.0 if contacts permissions get revoked
544		} catch (FileNotFoundException e) {
545			return null;
546		} finally {
547			close(is);
548		}
549	}
550
551	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
552		if (image == null) {
553			return null;
554		}
555		InputStream is = null;
556		try {
557			BitmapFactory.Options options = new BitmapFactory.Options();
558			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
559			is = mXmppConnectionService.getContentResolver().openInputStream(image);
560			if (is == null) {
561				return null;
562			}
563			Bitmap source = BitmapFactory.decodeStream(is, null, options);
564			if (source == null) {
565				return null;
566			}
567			int sourceWidth = source.getWidth();
568			int sourceHeight = source.getHeight();
569			float xScale = (float) newWidth / sourceWidth;
570			float yScale = (float) newHeight / sourceHeight;
571			float scale = Math.max(xScale, yScale);
572			float scaledWidth = scale * sourceWidth;
573			float scaledHeight = scale * sourceHeight;
574			float left = (newWidth - scaledWidth) / 2;
575			float top = (newHeight - scaledHeight) / 2;
576
577			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
578			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
579			Canvas canvas = new Canvas(dest);
580			canvas.drawBitmap(source, null, targetRect, null);
581			if (source != null && !source.isRecycled()) {
582				source.recycle();
583			}
584			return dest;
585		} catch (SecurityException e) {
586			return null; //android 6.0 with revoked permissions for example
587		} catch (FileNotFoundException e) {
588			return null;
589		} finally {
590			close(is);
591		}
592	}
593
594	public Bitmap cropCenterSquare(Bitmap input, int size) {
595		int w = input.getWidth();
596		int h = input.getHeight();
597
598		float scale = Math.max((float) size / h, (float) size / w);
599
600		float outWidth = scale * w;
601		float outHeight = scale * h;
602		float left = (size - outWidth) / 2;
603		float top = (size - outHeight) / 2;
604		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
605
606		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
607		Canvas canvas = new Canvas(output);
608		canvas.drawBitmap(input, null, target, null);
609		if (input != null && !input.isRecycled()) {
610			input.recycle();
611		}
612		return output;
613	}
614
615	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
616		BitmapFactory.Options options = new BitmapFactory.Options();
617		options.inJustDecodeBounds = true;
618		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
619		return calcSampleSize(options, size);
620	}
621
622	private static int calcSampleSize(File image, int size) {
623		BitmapFactory.Options options = new BitmapFactory.Options();
624		options.inJustDecodeBounds = true;
625		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
626		return calcSampleSize(options, size);
627	}
628
629	public static int calcSampleSize(BitmapFactory.Options options, int size) {
630		int height = options.outHeight;
631		int width = options.outWidth;
632		int inSampleSize = 1;
633
634		if (height > size || width > size) {
635			int halfHeight = height / 2;
636			int halfWidth = width / 2;
637
638			while ((halfHeight / inSampleSize) > size
639					&& (halfWidth / inSampleSize) > size) {
640				inSampleSize *= 2;
641			}
642		}
643		return inSampleSize;
644	}
645
646	public Uri getJingleFileUri(Message message) {
647		File file = getFile(message);
648		return Uri.parse("file://" + file.getAbsolutePath());
649	}
650
651	public void updateFileParams(Message message) {
652		updateFileParams(message,null);
653	}
654
655	public void updateFileParams(Message message, URL url) {
656		DownloadableFile file = getFile(message);
657		if (message.getType() == Message.TYPE_IMAGE || file.getMimeType().startsWith("image/")) {
658			BitmapFactory.Options options = new BitmapFactory.Options();
659			options.inJustDecodeBounds = true;
660			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
661			int rotation = getRotation(file);
662			boolean rotated = rotation == 90 || rotation == 270;
663			int imageHeight = rotated ? options.outWidth : options.outHeight;
664			int imageWidth = rotated ? options.outHeight : options.outWidth;
665			if (url == null) {
666				message.setBody(Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
667			} else {
668				message.setBody(url.toString()+"|"+Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
669			}
670		} else {
671			if (url != null) {
672				message.setBody(url.toString()+"|"+Long.toString(file.getSize()));
673			} else {
674				message.setBody(Long.toString(file.getSize()));
675			}
676		}
677
678	}
679
680	public class FileCopyException extends Exception {
681		private static final long serialVersionUID = -1010013599132881427L;
682		private int resId;
683
684		public FileCopyException(int resId) {
685			this.resId = resId;
686		}
687
688		public int getResId() {
689			return resId;
690		}
691	}
692
693	public Bitmap getAvatar(String avatar, int size) {
694		if (avatar == null) {
695			return null;
696		}
697		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
698		if (bm == null) {
699			return null;
700		}
701		return bm;
702	}
703
704	public boolean isFileAvailable(Message message) {
705		return getFile(message).exists();
706	}
707
708	public static void close(Closeable stream) {
709		if (stream != null) {
710			try {
711				stream.close();
712			} catch (IOException e) {
713			}
714		}
715	}
716
717	public static void close(Socket socket) {
718		if (socket != null) {
719			try {
720				socket.close();
721			} catch (IOException e) {
722			}
723		}
724	}
725
726
727	public static boolean weOwnFile(Context context, Uri uri) {
728		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
729			return false;
730		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
731			return fileIsInFilesDir(context, uri);
732		} else {
733			return weOwnFileLollipop(uri);
734		}
735	}
736
737
738	/**
739	 * This is more than hacky but probably way better than doing nothing
740	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
741	 * and check against those as well
742	 */
743	private static boolean fileIsInFilesDir(Context context, Uri uri) {
744		try {
745			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
746			final String needle = new File(uri.getPath()).getCanonicalPath();
747			return needle.startsWith(haystack);
748		} catch (IOException e) {
749			return false;
750		}
751	}
752
753	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
754	private static boolean weOwnFileLollipop(Uri uri) {
755		try {
756			File file = new File(uri.getPath());
757			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
758			StructStat st = Os.fstat(fd);
759			return st.st_uid == android.os.Process.myUid();
760		} catch (FileNotFoundException e) {
761			return false;
762		} catch (Exception e) {
763			return true;
764		}
765	}
766}