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