327 lines
13 KiB
Java
327 lines
13 KiB
Java
package org.thoughtcrime.securesms.linkpreview;
|
|
|
|
import android.content.Context;
|
|
import android.graphics.Bitmap;
|
|
import android.graphics.BitmapFactory;
|
|
import android.net.Uri;
|
|
import androidx.annotation.NonNull;
|
|
import androidx.annotation.Nullable;
|
|
import android.text.Html;
|
|
import android.text.TextUtils;
|
|
|
|
import com.bumptech.glide.load.engine.DiskCacheStrategy;
|
|
import com.bumptech.glide.request.FutureTarget;
|
|
import com.google.android.gms.common.util.IOUtils;
|
|
|
|
import org.thoughtcrime.securesms.ApplicationContext;
|
|
import org.thoughtcrime.securesms.attachments.Attachment;
|
|
import org.thoughtcrime.securesms.attachments.UriAttachment;
|
|
import org.thoughtcrime.securesms.database.AttachmentDatabase;
|
|
import org.thoughtcrime.securesms.dependencies.InjectableType;
|
|
import org.thoughtcrime.securesms.giph.model.ChunkedImageUrl;
|
|
import org.thoughtcrime.securesms.logging.Log;
|
|
import org.thoughtcrime.securesms.mms.GlideApp;
|
|
import org.thoughtcrime.securesms.net.CallRequestController;
|
|
import org.thoughtcrime.securesms.net.CompositeRequestController;
|
|
import org.thoughtcrime.securesms.net.ContentProxySafetyInterceptor;
|
|
import org.thoughtcrime.securesms.net.RequestController;
|
|
import org.thoughtcrime.securesms.providers.BlobProvider;
|
|
import org.thoughtcrime.securesms.stickers.StickerRemoteUri;
|
|
import org.thoughtcrime.securesms.stickers.StickerUrl;
|
|
import org.thoughtcrime.securesms.util.Hex;
|
|
import org.thoughtcrime.securesms.util.MediaUtil;
|
|
import org.thoughtcrime.securesms.util.concurrent.SignalExecutors;
|
|
import org.whispersystems.libsignal.InvalidMessageException;
|
|
import org.whispersystems.libsignal.util.Pair;
|
|
import org.whispersystems.libsignal.util.guava.Optional;
|
|
import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
|
|
import org.whispersystems.signalservice.api.messages.SignalServiceStickerManifest;
|
|
import org.whispersystems.signalservice.api.messages.SignalServiceStickerManifest.StickerInfo;
|
|
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.util.concurrent.CancellationException;
|
|
import java.util.concurrent.ExecutionException;
|
|
import java.util.regex.Matcher;
|
|
import java.util.regex.Pattern;
|
|
|
|
import javax.inject.Inject;
|
|
|
|
import okhttp3.CacheControl;
|
|
import okhttp3.Call;
|
|
import okhttp3.OkHttpClient;
|
|
import okhttp3.Request;
|
|
import okhttp3.Response;
|
|
|
|
public class LinkPreviewRepository implements InjectableType {
|
|
|
|
private static final String TAG = LinkPreviewRepository.class.getSimpleName();
|
|
|
|
private static final CacheControl NO_CACHE = new CacheControl.Builder().noCache().build();
|
|
|
|
private final OkHttpClient client;
|
|
|
|
@Inject SignalServiceMessageReceiver messageReceiver;
|
|
|
|
public LinkPreviewRepository(@NonNull Context context) {
|
|
this.client = new OkHttpClient.Builder()
|
|
// .proxySelector(new ContentProxySelector()) // Loki: Signal's proxy appears to have been banned by YouTube
|
|
.addNetworkInterceptor(new ContentProxySafetyInterceptor())
|
|
.cache(null)
|
|
.build();
|
|
|
|
ApplicationContext.getInstance(context).injectDependencies(this);
|
|
}
|
|
|
|
RequestController getLinkPreview(@NonNull Context context, @NonNull String url, @NonNull Callback<Optional<LinkPreview>> callback) {
|
|
CompositeRequestController compositeController = new CompositeRequestController();
|
|
|
|
if (!LinkPreviewUtil.isValidLinkUrl(url)) {
|
|
Log.w(TAG, "Tried to get a link preview for a non-whitelisted domain.");
|
|
callback.onComplete(Optional.absent());
|
|
return compositeController;
|
|
}
|
|
|
|
RequestController metadataController;
|
|
|
|
if (StickerUrl.isValidShareLink(url)) {
|
|
metadataController = fetchStickerPackLinkPreview(context, url, callback);
|
|
} else {
|
|
metadataController = fetchMetadata(url, metadata -> {
|
|
if (metadata.isEmpty()) {
|
|
callback.onComplete(Optional.absent());
|
|
return;
|
|
}
|
|
|
|
if (!metadata.getImageUrl().isPresent()) {
|
|
callback.onComplete(Optional.of(new LinkPreview(url, metadata.getTitle().get(), Optional.absent())));
|
|
return;
|
|
}
|
|
|
|
RequestController imageController = fetchThumbnail(context, metadata.getImageUrl().get(), attachment -> {
|
|
if (!metadata.getTitle().isPresent() && !attachment.isPresent()) {
|
|
callback.onComplete(Optional.absent());
|
|
} else {
|
|
callback.onComplete(Optional.of(new LinkPreview(url, metadata.getTitle().or(""), attachment)));
|
|
}
|
|
});
|
|
|
|
compositeController.addController(imageController);
|
|
});
|
|
}
|
|
|
|
compositeController.addController(metadataController);
|
|
return compositeController;
|
|
}
|
|
|
|
private @NonNull RequestController fetchMetadata(@NonNull String url, Callback<Metadata> callback) {
|
|
Call call = client.newCall(new Request.Builder().url(url).cacheControl(NO_CACHE).build());
|
|
|
|
call.enqueue(new okhttp3.Callback() {
|
|
@Override
|
|
public void onFailure(@NonNull Call call, @NonNull IOException e) {
|
|
Log.w(TAG, "Request failed.", e);
|
|
callback.onComplete(Metadata.empty());
|
|
}
|
|
|
|
@Override
|
|
public void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {
|
|
if (!response.isSuccessful()) {
|
|
Log.w(TAG, "Non-successful response. Code: " + response.code());
|
|
callback.onComplete(Metadata.empty());
|
|
return;
|
|
} else if (response.body() == null) {
|
|
Log.w(TAG, "No response body.");
|
|
callback.onComplete(Metadata.empty());
|
|
return;
|
|
}
|
|
|
|
String body = response.body().string();
|
|
Optional<String> title = getProperty(body, "title");
|
|
Optional<String> imageUrl = getProperty(body, "image");
|
|
|
|
if (imageUrl.isPresent() && !LinkPreviewUtil.isValidMediaUrl(imageUrl.get())) {
|
|
Log.i(TAG, "Image URL was invalid or for a non-whitelisted domain. Skipping.");
|
|
imageUrl = Optional.absent();
|
|
}
|
|
|
|
callback.onComplete(new Metadata(title, imageUrl));
|
|
}
|
|
});
|
|
|
|
return new CallRequestController(call);
|
|
}
|
|
|
|
private @NonNull RequestController fetchThumbnail(@NonNull Context context, @NonNull String imageUrl, @NonNull Callback<Optional<Attachment>> callback) {
|
|
Call call = client.newCall(new Request.Builder().url(imageUrl).build());
|
|
CallRequestController controller = new CallRequestController(call);
|
|
|
|
SignalExecutors.UNBOUNDED.execute(() -> {
|
|
try {
|
|
Response response = call.execute();
|
|
if (!response.isSuccessful() || response.body() == null) {
|
|
return;
|
|
}
|
|
|
|
InputStream bodyStream = response.body().byteStream();
|
|
controller.setStream(bodyStream);
|
|
|
|
byte[] data = IOUtils.readInputStreamFully(bodyStream);
|
|
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
|
|
Optional<Attachment> thumbnail = bitmapToAttachment(bitmap, Bitmap.CompressFormat.JPEG, MediaUtil.IMAGE_JPEG);
|
|
|
|
if (bitmap != null) bitmap.recycle();
|
|
|
|
callback.onComplete(thumbnail);
|
|
} catch (IOException e) {
|
|
Log.w(TAG, "Exception during link preview image retrieval.", e);
|
|
controller.cancel();
|
|
callback.onComplete(Optional.absent());
|
|
}
|
|
});
|
|
|
|
return controller;
|
|
}
|
|
|
|
private @NonNull Optional<String> getProperty(@NonNull String searchText, @NonNull String property) {
|
|
Pattern pattern = Pattern.compile("<\\s*meta\\s+property\\s*=\\s*\"\\s*og:" + property + "\\s*\"\\s+[^>]*content\\s*=\\s*\"(.*?)\"[^>]*/?\\s*>", Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
|
|
Matcher matcher = pattern.matcher(searchText);
|
|
if (matcher.find()) {
|
|
String text = Html.fromHtml(matcher.group(1)).toString();
|
|
if (!TextUtils.isEmpty(text)) { return Optional.of(text); }
|
|
}
|
|
|
|
pattern = Pattern.compile("<\\s*" + property + "[^>]*>(.*?)<\\s*/" + property + "[^>]*>", Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
|
|
matcher = pattern.matcher(searchText);
|
|
if (matcher.find()) {
|
|
String text = Html.fromHtml(matcher.group(1)).toString();
|
|
if (!TextUtils.isEmpty(text)) { return Optional.of(text); }
|
|
}
|
|
|
|
return Optional.absent();
|
|
}
|
|
|
|
private RequestController fetchStickerPackLinkPreview(@NonNull Context context,
|
|
@NonNull String packUrl,
|
|
@NonNull Callback<Optional<LinkPreview>> callback)
|
|
{
|
|
SignalExecutors.UNBOUNDED.execute(() -> {
|
|
try {
|
|
Pair<String, String> stickerParams = StickerUrl.parseShareLink(packUrl).or(new Pair<>("", ""));
|
|
String packIdString = stickerParams.first();
|
|
String packKeyString = stickerParams.second();
|
|
byte[] packIdBytes = Hex.fromStringCondensed(packIdString);
|
|
byte[] packKeyBytes = Hex.fromStringCondensed(packKeyString);
|
|
|
|
SignalServiceStickerManifest manifest = messageReceiver.retrieveStickerManifest(packIdBytes, packKeyBytes);
|
|
|
|
String title = manifest.getTitle().or(manifest.getAuthor()).or("");
|
|
Optional<StickerInfo> firstSticker = Optional.fromNullable(manifest.getStickers().size() > 0 ? manifest.getStickers().get(0) : null);
|
|
Optional<StickerInfo> cover = manifest.getCover().or(firstSticker);
|
|
|
|
if (cover.isPresent()) {
|
|
Bitmap bitmap = GlideApp.with(context).asBitmap()
|
|
.load(new StickerRemoteUri(packIdString, packKeyString, cover.get().getId()))
|
|
.skipMemoryCache(true)
|
|
.diskCacheStrategy(DiskCacheStrategy.NONE)
|
|
.centerInside()
|
|
.submit(512, 512)
|
|
.get();
|
|
|
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
|
|
|
bitmap.compress(Bitmap.CompressFormat.WEBP, 80, baos);
|
|
|
|
byte[] bytes = baos.toByteArray();
|
|
Uri uri = BlobProvider.getInstance().forData(bytes).createForSingleSessionInMemory();
|
|
Optional<Attachment> thumbnail = Optional.of(new UriAttachment(uri,
|
|
uri,
|
|
MediaUtil.IMAGE_WEBP,
|
|
AttachmentDatabase.TRANSFER_PROGRESS_STARTED,
|
|
bytes.length,
|
|
bitmap.getWidth(),
|
|
bitmap.getHeight(),
|
|
null,
|
|
null,
|
|
false,
|
|
false,
|
|
null,
|
|
null));
|
|
|
|
callback.onComplete(Optional.of(new LinkPreview(packUrl, title, thumbnail)));
|
|
} else {
|
|
callback.onComplete(Optional.absent());
|
|
}
|
|
} catch (IOException | InvalidMessageException | ExecutionException | InterruptedException e) {
|
|
Log.w(TAG, "Failed to fetch sticker pack link preview.");
|
|
callback.onComplete(Optional.absent());
|
|
}
|
|
});
|
|
|
|
return () -> Log.i(TAG, "Cancelled sticker pack link preview fetch -- no effect.");
|
|
}
|
|
|
|
private static Optional<Attachment> bitmapToAttachment(@Nullable Bitmap bitmap,
|
|
@NonNull Bitmap.CompressFormat format,
|
|
@NonNull String contentType)
|
|
{
|
|
if (bitmap == null) {
|
|
return Optional.absent();
|
|
}
|
|
|
|
ByteArrayOutputStream baos = new ByteArrayOutputStream();
|
|
|
|
bitmap.compress(format, 80, baos);
|
|
|
|
byte[] bytes = baos.toByteArray();
|
|
Uri uri = BlobProvider.getInstance().forData(bytes).createForSingleSessionInMemory();
|
|
|
|
return Optional.of(new UriAttachment(uri,
|
|
uri,
|
|
contentType,
|
|
AttachmentDatabase.TRANSFER_PROGRESS_STARTED,
|
|
bytes.length,
|
|
bitmap.getWidth(),
|
|
bitmap.getHeight(),
|
|
null,
|
|
null,
|
|
false,
|
|
false,
|
|
null,
|
|
null));
|
|
|
|
}
|
|
|
|
|
|
private static class Metadata {
|
|
private final Optional<String> title;
|
|
private final Optional<String> imageUrl;
|
|
|
|
Metadata(Optional<String> title, Optional<String> imageUrl) {
|
|
this.title = title;
|
|
this.imageUrl = imageUrl;
|
|
}
|
|
|
|
static Metadata empty() {
|
|
return new Metadata(Optional.absent(), Optional.absent());
|
|
}
|
|
|
|
Optional<String> getTitle() {
|
|
return title;
|
|
}
|
|
|
|
Optional<String> getImageUrl() {
|
|
return imageUrl;
|
|
}
|
|
|
|
boolean isEmpty() {
|
|
return !title.isPresent() && !imageUrl.isPresent();
|
|
}
|
|
}
|
|
|
|
interface Callback<T> {
|
|
void onComplete(@NonNull T result);
|
|
}
|
|
}
|