gecko/mobile/android/base/Favicons.java

359 lines
12 KiB
Java

/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import org.mozilla.gecko.db.BrowserDB;
import org.mozilla.gecko.util.GeckoJarReader;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.BufferedHttpEntity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteQueryBuilder;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.http.AndroidHttpClient;
import android.os.AsyncTask;
import android.util.Log;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class Favicons {
private static final String LOGTAG = "GeckoFavicons";
public static final long NOT_LOADING = 0;
private Context mContext;
private DatabaseHelper mDbHelper;
private Map<Long,LoadFaviconTask> mLoadTasks;
private long mNextFaviconLoadId;
private static final String USER_AGENT = GeckoApp.mAppContext.getDefaultUAString();
private AndroidHttpClient mHttpClient;
public interface OnFaviconLoadedListener {
public void onFaviconLoaded(String url, Drawable favicon);
}
private class DatabaseHelper extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "favicon_urls.db";
private static final String TABLE_NAME = "favicon_urls";
private static final int DATABASE_VERSION = 1;
private static final String COLUMN_ID = "_id";
private static final String COLUMN_FAVICON_URL = "favicon_url";
private static final String COLUMN_PAGE_URL = "page_url";
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
Log.d(LOGTAG, "Creating DatabaseHelper");
}
@Override
public void onCreate(SQLiteDatabase db) {
Log.d(LOGTAG, "Creating database for favicon URLs");
db.execSQL("CREATE TABLE " + TABLE_NAME + " (" +
COLUMN_ID + " INTEGER PRIMARY KEY," +
COLUMN_FAVICON_URL + " TEXT NOT NULL," +
COLUMN_PAGE_URL + " TEXT UNIQUE NOT NULL" +
");");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(LOGTAG, "Upgrading favicon URLs database from version " +
oldVersion + " to " + newVersion + ", which will destroy all old data");
// Drop table completely
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
// Recreate database
onCreate(db);
}
public String getFaviconUrlForPageUrl(String pageUrl) {
SQLiteDatabase db = mDbHelper.getReadableDatabase();
SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
qb.setTables(TABLE_NAME);
Cursor c = qb.query(
db,
new String[] { COLUMN_FAVICON_URL },
COLUMN_PAGE_URL + " = ?",
new String[] { pageUrl },
null, null, null
);
if (!c.moveToFirst()) {
c.close();
return null;
}
String url = c.getString(c.getColumnIndexOrThrow(COLUMN_FAVICON_URL));
c.close();
return url;
}
public void setFaviconUrlForPageUrl(String pageUrl, String faviconUrl) {
SQLiteDatabase db = mDbHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(COLUMN_FAVICON_URL, faviconUrl);
values.put(COLUMN_PAGE_URL, pageUrl);
db.replace(TABLE_NAME, null, values);
}
public void clearFavicons() {
SQLiteDatabase db = mDbHelper.getWritableDatabase();
db.delete(TABLE_NAME, null, null);
}
}
public Favicons(Context context) {
Log.d(LOGTAG, "Creating Favicons instance");
mContext = context;
mDbHelper = new DatabaseHelper(context);
mLoadTasks = Collections.synchronizedMap(new HashMap<Long,LoadFaviconTask>());
mNextFaviconLoadId = 0;
}
private synchronized AndroidHttpClient getHttpClient() {
if (mHttpClient != null)
return mHttpClient;
mHttpClient = AndroidHttpClient.newInstance(USER_AGENT);
return mHttpClient;
}
public String getFaviconUrlForPageUrl(String pageUrl) {
return mDbHelper.getFaviconUrlForPageUrl(pageUrl);
}
public long loadFavicon(String pageUrl, String faviconUrl,
OnFaviconLoadedListener listener) {
// Handle the case where page url is empty
if (pageUrl == null || pageUrl.length() == 0) {
if (listener != null)
listener.onFaviconLoaded(null, null);
}
LoadFaviconTask task = new LoadFaviconTask(pageUrl, faviconUrl, listener);
long taskId = task.getId();
mLoadTasks.put(taskId, task);
task.execute();
return taskId;
}
public boolean cancelFaviconLoad(long taskId) {
Log.d(LOGTAG, "Requesting cancelation of favicon load (" + taskId + ")");
boolean cancelled = false;
synchronized (mLoadTasks) {
if (!mLoadTasks.containsKey(taskId))
return false;
Log.d(LOGTAG, "Cancelling favicon load (" + taskId + ")");
LoadFaviconTask task = mLoadTasks.get(taskId);
cancelled = task.cancel(false);
}
return cancelled;
}
public void clearFavicons() {
mDbHelper.clearFavicons();
}
public void close() {
Log.d(LOGTAG, "Closing Favicons database");
mDbHelper.close();
// Cancel any pending tasks
synchronized (mLoadTasks) {
Set<Long> taskIds = mLoadTasks.keySet();
Iterator<Long> iter = taskIds.iterator();
while (iter.hasNext()) {
long taskId = iter.next();
cancelFaviconLoad(taskId);
}
}
if (mHttpClient != null)
mHttpClient.close();
}
private class LoadFaviconTask extends AsyncTask<Void, Void, BitmapDrawable> {
private long mId;
private String mPageUrl;
private String mFaviconUrl;
private OnFaviconLoadedListener mListener;
public LoadFaviconTask(String pageUrl, String faviconUrl, OnFaviconLoadedListener listener) {
synchronized(this) {
mId = ++mNextFaviconLoadId;
}
mPageUrl = pageUrl;
mFaviconUrl = faviconUrl;
mListener = listener;
}
// Runs in background thread
private BitmapDrawable loadFaviconFromDb() {
ContentResolver resolver = mContext.getContentResolver();
BitmapDrawable favicon = BrowserDB.getFaviconForUrl(resolver, mPageUrl);
return favicon;
}
// Runs in background thread
private void saveFaviconToDb(BitmapDrawable favicon) {
// since the Async task can run this on any number of threads in the
// pool, we need to protect against inserting the same url twice
synchronized(mDbHelper) {
ContentResolver resolver = mContext.getContentResolver();
BrowserDB.updateFaviconForUrl(resolver, mPageUrl, favicon);
mDbHelper.setFaviconUrlForPageUrl(mPageUrl, mFaviconUrl);
}
}
// Runs in background thread
private BitmapDrawable downloadFavicon(URL faviconUrl) {
if (mFaviconUrl.startsWith("jar:jar:")) {
return GeckoJarReader.getBitmapDrawable(GeckoApp.mAppContext.getResources(), mFaviconUrl);
}
URI uri;
try {
uri = faviconUrl.toURI();
} catch (URISyntaxException e) {
Log.d(LOGTAG, "Could not get URI for favicon");
return null;
}
// only get favicons for HTTP/HTTPS
String scheme = uri.getScheme();
if (!"http".equals(scheme) && !"https".equals(scheme))
return null;
// skia decoder sometimes returns null; workaround is to use BufferedHttpEntity
// http://groups.google.com/group/android-developers/browse_thread/thread/171b8bf35dbbed96/c3ec5f45436ceec8?lnk=raot
BitmapDrawable image = null;
try {
HttpGet request = new HttpGet(faviconUrl.toURI());
HttpEntity entity = getHttpClient().execute(request).getEntity();
BufferedHttpEntity bufferedEntity = new BufferedHttpEntity(entity);
InputStream contentStream = bufferedEntity.getContent();
image = (BitmapDrawable) Drawable.createFromStream(contentStream, "src");
} catch (Exception e) {
Log.e(LOGTAG, "Error reading favicon", e);
}
return image;
}
@Override
protected BitmapDrawable doInBackground(Void... unused) {
BitmapDrawable image = null;
if (isCancelled())
return null;
URL faviconUrl = null;
// Handle the case of malformed favicon URL
try {
// If favicon is empty, fallback to default favicon URI
if (mFaviconUrl == null || mFaviconUrl.length() == 0) {
// Handle the case of malformed URL
URL pageUrl = null;
pageUrl = new URL(mPageUrl);
faviconUrl = new URL(pageUrl.getProtocol(), pageUrl.getAuthority(), "/favicon.ico");
mFaviconUrl = faviconUrl.toString();
} else {
faviconUrl = new URL(mFaviconUrl);
}
} catch (MalformedURLException e) {
Log.d(LOGTAG, "The provided favicon URL is not valid");
return null;
}
if (isCancelled())
return null;
String storedFaviconUrl = mDbHelper.getFaviconUrlForPageUrl(mPageUrl);
if (storedFaviconUrl != null && storedFaviconUrl.equals(mFaviconUrl)) {
image = loadFaviconFromDb();
if (image != null)
return image;
}
if (isCancelled())
return null;
image = downloadFavicon(faviconUrl);
if (image != null) {
saveFaviconToDb(image);
}
return image;
}
@Override
protected void onPostExecute(final BitmapDrawable image) {
mLoadTasks.remove(mId);
if (mListener != null) {
// We want to always run the listener on UI thread
GeckoApp.mAppContext.runOnUiThread(new Runnable() {
public void run() {
mListener.onFaviconLoaded(mPageUrl, image);
}
});
}
}
@Override
protected void onCancelled() {
mLoadTasks.remove(mId);
// Note that we don't call the listener callback if the
// favicon load is cancelled.
}
public long getId() {
return mId;
}
}
}