Conversations/src/eu/siacs/conversations/persistance/FileBackend.java

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Java
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package eu.siacs.conversations.persistance;
import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.DigestOutputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
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import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
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import android.graphics.Matrix;
import android.graphics.RectF;
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import android.media.ExifInterface;
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import android.net.Uri;
import android.util.Base64;
import android.util.Base64OutputStream;
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import android.util.Log;
import android.util.LruCache;
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import eu.siacs.conversations.R;
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import eu.siacs.conversations.entities.Conversation;
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import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.xmpp.jingle.JingleFile;
import eu.siacs.conversations.xmpp.pep.Avatar;
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public class FileBackend {
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private static int IMAGE_SIZE = 1920;
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private Context context;
private LruCache<String, Bitmap> thumbnailCache;
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public FileBackend(Context context) {
this.context = context;
int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
int cacheSize = maxMemory / 8;
thumbnailCache = new LruCache<String, Bitmap>(cacheSize) {
@Override
protected int sizeOf(String key, Bitmap bitmap) {
return bitmap.getByteCount() / 1024;
}
};
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}
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public LruCache<String, Bitmap> getThumbnailCache() {
return thumbnailCache;
}
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public JingleFile getJingleFile(Message message) {
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return getJingleFile(message, true);
}
public JingleFile getJingleFile(Message message, boolean decrypted) {
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Conversation conversation = message.getConversation();
String prefix = context.getFilesDir().getAbsolutePath();
String path = prefix + "/" + conversation.getAccount().getJid() + "/"
+ conversation.getContactJid();
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String filename;
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if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
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filename = message.getUuid() + ".webp";
} else {
if (message.getEncryption() == Message.ENCRYPTION_OTR) {
filename = message.getUuid() + ".webp";
} else {
filename = message.getUuid() + ".webp.pgp";
}
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}
return new JingleFile(path + "/" + filename);
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}
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public Bitmap resize(Bitmap originalBitmap, int size) {
int w = originalBitmap.getWidth();
int h = originalBitmap.getHeight();
if (Math.max(w, h) > size) {
int scalledW;
int scalledH;
if (w <= h) {
scalledW = (int) (w / ((double) h / size));
scalledH = size;
} else {
scalledW = size;
scalledH = (int) (h / ((double) w / size));
}
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Bitmap scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
scalledW, scalledH, true);
return scalledBitmap;
} else {
return originalBitmap;
}
}
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public Bitmap rotate(Bitmap bitmap, int degree) {
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
mtx.postRotate(degree);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
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public JingleFile copyImageToPrivateStorage(Message message, Uri image)
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throws ImageCopyException {
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return this.copyImageToPrivateStorage(message, image, 0);
}
private JingleFile copyImageToPrivateStorage(Message message, Uri image,
int sampleSize) throws ImageCopyException {
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try {
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InputStream is;
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if (image != null) {
is = context.getContentResolver().openInputStream(image);
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} else {
is = new FileInputStream(getIncomingFile());
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image = getIncomingUri();
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}
JingleFile file = getJingleFile(message);
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file.getParentFile().mkdirs();
file.createNewFile();
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Bitmap originalBitmap;
BitmapFactory.Options options = new BitmapFactory.Options();
int inSampleSize = (int) Math.pow(2, sampleSize);
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Log.d("xmppService", "reading bitmap with sample size "
+ inSampleSize);
options.inSampleSize = inSampleSize;
originalBitmap = BitmapFactory.decodeStream(is, null, options);
is.close();
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if (originalBitmap == null) {
throw new ImageCopyException(R.string.error_not_an_image_file);
}
if (image == null) {
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getIncomingFile().delete();
}
Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
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originalBitmap = null;
ExifInterface exif = new ExifInterface(image.toString());
if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
.equalsIgnoreCase("6")) {
scalledBitmap = rotate(scalledBitmap, 90);
} else if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
.equalsIgnoreCase("8")) {
scalledBitmap = rotate(scalledBitmap, 270);
} else if (exif.getAttribute(ExifInterface.TAG_ORIENTATION)
.equalsIgnoreCase("3")) {
scalledBitmap = rotate(scalledBitmap, 180);
}
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OutputStream os = new FileOutputStream(file);
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boolean success = scalledBitmap.compress(
Bitmap.CompressFormat.WEBP, 75, os);
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if (!success) {
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throw new ImageCopyException(R.string.error_compressing_image);
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}
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os.flush();
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os.close();
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long size = file.getSize();
int width = scalledBitmap.getWidth();
int height = scalledBitmap.getHeight();
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message.setBody("" + size + "," + width + "," + height);
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return file;
} catch (FileNotFoundException e) {
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throw new ImageCopyException(R.string.error_file_not_found);
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} catch (IOException e) {
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throw new ImageCopyException(R.string.error_io_exception);
} catch (SecurityException e) {
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throw new ImageCopyException(
R.string.error_security_exception_during_image_copy);
} catch (OutOfMemoryError e) {
++sampleSize;
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if (sampleSize <= 3) {
return copyImageToPrivateStorage(message, image, sampleSize);
} else {
throw new ImageCopyException(R.string.error_out_of_memory);
}
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}
}
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public Bitmap getImageFromMessage(Message message) {
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return BitmapFactory.decodeFile(getJingleFile(message)
.getAbsolutePath());
}
public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
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throws FileNotFoundException {
Bitmap thumbnail = thumbnailCache.get(message.getUuid());
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if ((thumbnail == null) && (!cacheOnly)) {
Bitmap fullsize = BitmapFactory.decodeFile(getJingleFile(message)
.getAbsolutePath());
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if (fullsize == null) {
throw new FileNotFoundException();
}
thumbnail = resize(fullsize, size);
this.thumbnailCache.put(message.getUuid(), thumbnail);
}
return thumbnail;
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}
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public void removeFiles(Conversation conversation) {
String prefix = context.getFilesDir().getAbsolutePath();
String path = prefix + "/" + conversation.getAccount().getJid() + "/"
+ conversation.getContactJid();
File file = new File(path);
try {
this.deleteFile(file);
} catch (IOException e) {
Log.d("xmppService",
"error deleting file: " + file.getAbsolutePath());
}
}
private void deleteFile(File f) throws IOException {
if (f.isDirectory()) {
for (File c : f.listFiles())
deleteFile(c);
}
f.delete();
}
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public File getIncomingFile() {
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return new File(context.getFilesDir().getAbsolutePath() + "/incoming");
}
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public Uri getIncomingUri() {
return Uri.parse(context.getFilesDir().getAbsolutePath() + "/incoming");
}
public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
try {
Avatar avatar = new Avatar();
Bitmap bm = cropCenterSquare(image, size);
ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
Base64OutputStream mBase64OutputSttream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
MessageDigest digest = MessageDigest.getInstance("SHA-1");
DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputSttream, digest);
if (!bm.compress(format, 75, mDigestOutputStream)) {
return null;
}
mDigestOutputStream.flush();
mDigestOutputStream.close();
avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
avatar.image = new String(mByteArrayOutputStream.toByteArray());
return avatar;
} catch (NoSuchAlgorithmException e) {
return null;
} catch (IOException e) {
return null;
}
}
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public boolean isAvatarCached(Avatar avatar) {
File file = new File(getAvatarPath(context, avatar.getFilename()));
return file.exists();
}
public boolean save(Avatar avatar) {
if (isAvatarCached(avatar)) {
return true;
}
String filename = getAvatarPath(context, avatar.getFilename());
File file = new File(filename+".tmp");
file.getParentFile().mkdirs();
try {
file.createNewFile();
FileOutputStream mFileOutputStream = new FileOutputStream(file);
MessageDigest digest = MessageDigest.getInstance("SHA-1");
digest.reset();
DigestOutputStream mDigestOutputStream = new DigestOutputStream(mFileOutputStream, digest);
mDigestOutputStream.write(avatar.getImageAsBytes());
mDigestOutputStream.flush();
mDigestOutputStream.close();
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avatar.size = file.length();
String sha1sum = CryptoHelper.bytesToHex(digest.digest());
if (sha1sum.equals(avatar.sha1sum)) {
file.renameTo(new File(filename));
return true;
} else {
Log.d("xmppService","sha1sum mismatch for "+avatar.owner);
file.delete();
return false;
}
} catch (FileNotFoundException e) {
return false;
} catch (IOException e) {
return false;
} catch (NoSuchAlgorithmException e) {
return false;
}
}
public static String getAvatarPath(Context context, String avatar) {
return context.getFilesDir().getAbsolutePath() + "/avatars/"+avatar;
}
public Bitmap cropCenterSquare(Uri image, int size) {
try {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = calcSampleSize(image, size);
InputStream is = context.getContentResolver()
.openInputStream(image);
Bitmap input = BitmapFactory.decodeStream(is, null, options);
int w = input.getWidth();
int h = input.getHeight();
float scale = Math.max((float) size / h, (float) size / w);
float outWidth = scale * w;
float outHeight = scale * h;
float left = (size - outWidth) / 2;
float top = (size - outHeight) / 2;
RectF target = new RectF(left, top, left + outWidth, top
+ outHeight);
Bitmap output = Bitmap.createBitmap(size, size, input.getConfig());
Canvas canvas = new Canvas(output);
canvas.drawBitmap(input, null, target, null);
return output;
} catch (FileNotFoundException e) {
return null;
}
}
private int calcSampleSize(Uri image, int size)
throws FileNotFoundException {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(context.getContentResolver()
.openInputStream(image), null, options);
int height = options.outHeight;
int width = options.outWidth;
int inSampleSize = 1;
if (height > size || width > size) {
int halfHeight = height / 2;
int halfWidth = width / 2;
while ((halfHeight / inSampleSize) > size
&& (halfWidth / inSampleSize) > size) {
inSampleSize *= 2;
}
}
return inSampleSize;
}
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public class ImageCopyException extends Exception {
private static final long serialVersionUID = -1010013599132881427L;
private int resId;
public ImageCopyException(int resId) {
this.resId = resId;
}
public int getResId() {
return resId;
}
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}
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}