100 lines
2.5 KiB
Java
100 lines
2.5 KiB
Java
package acr.browser.lightning;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.res.AssetManager;
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import android.util.Log;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.util.HashSet;
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import java.util.Locale;
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import java.util.Set;
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public class AdBlock {
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private static final String TAG = "AdBlock";
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private static final String BLOCKED_DOMAINS_LIST_FILE_NAME = "hosts.txt";
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private static final Set<String> mBlockedDomainsList = new HashSet<String>();
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private SharedPreferences mPreferences;
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private boolean mBlockAds;
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private static final Locale mLocale = Locale.getDefault();
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public AdBlock(Context context) {
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if (mBlockedDomainsList.isEmpty()) {
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loadBlockedDomainsList(context);
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}
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mPreferences = context.getSharedPreferences(PreferenceConstants.PREFERENCES, 0);
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mBlockAds = mPreferences.getBoolean(PreferenceConstants.BLOCK_ADS, false);
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}
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public void updatePreference() {
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mBlockAds = mPreferences.getBoolean(PreferenceConstants.BLOCK_ADS, false);
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}
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private void loadBlockedDomainsList(final Context context) {
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Thread thread = new Thread(new Runnable() {
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@Override
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public void run() {
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AssetManager asset = context.getAssets();
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try {
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BufferedReader reader = new BufferedReader(new InputStreamReader(
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asset.open(BLOCKED_DOMAINS_LIST_FILE_NAME)));
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String line;
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while ((line = reader.readLine()) != null) {
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mBlockedDomainsList.add(line.trim().toLowerCase(mLocale));
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}
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} catch (IOException e) {
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Log.wtf(TAG, "Reading blocked domains list from file '"
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+ BLOCKED_DOMAINS_LIST_FILE_NAME + "' failed.", e);
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}
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}
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});
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thread.start();
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}
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public boolean isAd(String url) {
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if (!mBlockAds) {
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return false;
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}
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String domain;
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try {
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domain = getDomainName(url);
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} catch (URISyntaxException e) {
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Log.e(TAG, "URL '" + url + "' is invalid", e);
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return false;
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}
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boolean isOnBlacklist = mBlockedDomainsList.contains(domain.toLowerCase(mLocale));
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if (isOnBlacklist) {
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Log.d(TAG, "URL '" + url + "' is an ad");
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}
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return isOnBlacklist;
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}
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private static String getDomainName(String url) throws URISyntaxException {
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int index = url.indexOf('/', 8);
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if (index != -1) {
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url = url.substring(0, index);
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}
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URI uri = new URI(url);
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String domain = uri.getHost();
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if (domain == null) {
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return url;
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}
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return domain.startsWith("www.") ? domain.substring(4) : domain;
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}
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}
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