Merge "Add utility interface for WebView preparation logic." into nyc-dev (fdd84fef) · Commits · e / os / android_frameworks_base

core/java/android/webkit/IWebViewUpdateService.aidl

+5 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,11 @@ interface IWebViewUpdateService {
		*/
		WebViewProviderInfo[] getValidWebViewPackages();

		/**
		* Fetch all packages that could potentially implement WebView.
		*/
		WebViewProviderInfo[] getAllWebViewPackages();

		/**
		* Used by DevelopmentSetting to get the name of the WebView provider currently in use.
		*/

core/java/android/webkit/WebViewFactory.java

+1 −90

Original line number	Diff line number	Diff line
		@@ -128,98 +128,9 @@ public final class WebViewFactory {
		public MissingWebViewPackageException(Exception e) { super(e); }
		}

		private static String TAG_START = "webviewproviders";
		private static String TAG_WEBVIEW_PROVIDER = "webviewprovider";
		private static String TAG_PACKAGE_NAME = "packageName";
		private static String TAG_DESCRIPTION = "description";
		// Whether or not the provider must be explicitly chosen by the user to be used.
		private static String TAG_AVAILABILITY = "availableByDefault";
		private static String TAG_SIGNATURE = "signature";
		private static String TAG_FALLBACK = "isFallback";

		/**
		* Reads all signatures at the current depth (within the current provider) from the XML parser.
		*/
		private static String[] readSignatures(XmlResourceParser parser) throws IOException,
		XmlPullParserException {
		List<String> signatures = new ArrayList<String>();
		int outerDepth = parser.getDepth();
		while(XmlUtils.nextElementWithin(parser, outerDepth)) {
		if (parser.getName().equals(TAG_SIGNATURE)) {
		// Parse the value within the signature tag
		String signature = parser.nextText();
		signatures.add(signature);
		} else {
		Log.e(LOGTAG, "Found an element in a webview provider that is not a signature");
		}
		}
		return signatures.toArray(new String[signatures.size()]);
		}

		/**
		* Returns all packages declared in the framework resources as potential WebView providers.
		* @hide
		* */
		public static WebViewProviderInfo[] getWebViewPackages() {
		int numFallbackPackages = 0;
		XmlResourceParser parser = null;
		List<WebViewProviderInfo> webViewProviders = new ArrayList<WebViewProviderInfo>();
		try {
		parser = AppGlobals.getInitialApplication().getResources().getXml(
		com.android.internal.R.xml.config_webview_packages);
		XmlUtils.beginDocument(parser, TAG_START);
		while(true) {
		XmlUtils.nextElement(parser);
		String element = parser.getName();
		if (element == null) {
		break;
		}
		if (element.equals(TAG_WEBVIEW_PROVIDER)) {
		String packageName = parser.getAttributeValue(null, TAG_PACKAGE_NAME);
		if (packageName == null) {
		throw new MissingWebViewPackageException(
		"WebView provider in framework resources missing package name");
		}
		String description = parser.getAttributeValue(null, TAG_DESCRIPTION);
		if (description == null) {
		throw new MissingWebViewPackageException(
		"WebView provider in framework resources missing description");
		}
		boolean availableByDefault = "true".equals(
		parser.getAttributeValue(null, TAG_AVAILABILITY));
		boolean isFallback = "true".equals(
		parser.getAttributeValue(null, TAG_FALLBACK));
		WebViewProviderInfo currentProvider =
		new WebViewProviderInfo(packageName, description, availableByDefault,
		isFallback, readSignatures(parser));
		if (currentProvider.isFallbackPackage()) {
		numFallbackPackages++;
		if (numFallbackPackages > 1) {
		throw new AndroidRuntimeException(
		"There can be at most one webview fallback package.");
		}
		}
		webViewProviders.add(currentProvider);
		}
		else {
		Log.e(LOGTAG, "Found an element that is not a webview provider");
		}
		}
		} catch(XmlPullParserException e) {
		throw new MissingWebViewPackageException("Error when parsing WebView meta data " + e);
		} catch(IOException e) {
		throw new MissingWebViewPackageException("Error when parsing WebView meta data " + e);
		} finally {
		if (parser != null) parser.close();
		}
		return webViewProviders.toArray(new WebViewProviderInfo[webViewProviders.size()]);
		}


		// TODO (gsennton) remove when committing webview xts test change
		public static String getWebViewPackageName() {
		WebViewProviderInfo[] providers = getWebViewPackages();
		return providers[0].packageName;
		return null;
		}

		/**

core/java/android/webkit/WebViewProviderInfo.java

+4 −0

Original line number	Diff line number	Diff line
		@@ -150,6 +150,8 @@ public class WebViewProviderInfo implements Parcelable {
		private WebViewProviderInfo(Parcel in) {
		packageName = in.readString();
		description = in.readString();
		availableByDefault = (in.readInt() > 0);
		isFallback = (in.readInt() > 0);
		signatures = in.createStringArray();
		packageInfo = null;
		}
		@@ -163,6 +165,8 @@ public class WebViewProviderInfo implements Parcelable {
		public void writeToParcel(Parcel out, int flags) {
		out.writeString(packageName);
		out.writeString(description);
		out.writeInt(availableByDefault ? 1 : 0);
		out.writeInt(isFallback ? 1 : 0);
		out.writeStringArray(signatures);
		}

services/core/java/com/android/server/webkit/WebViewUpdateService.java

+25 −37

Original line number	Diff line number	Diff line
		@@ -35,14 +35,14 @@ import android.os.RemoteException;
		import android.os.ResultReceiver;
		import android.os.UserHandle;
		import android.os.UserManager;
		import android.provider.Settings;
		import android.provider.Settings.Global;
		import android.provider.Settings;
		import android.util.AndroidRuntimeException;
		import android.util.Slog;
		import android.webkit.IWebViewUpdateService;
		import android.webkit.WebViewFactory;
		import android.webkit.WebViewProviderInfo;
		import android.webkit.WebViewProviderResponse;
		import android.webkit.WebViewFactory;

		import com.android.server.SystemService;

		@@ -76,9 +76,11 @@ public class WebViewUpdateService extends SystemService {
		private WebViewProviderInfo[] mCurrentValidWebViewPackages = null;

		private BroadcastReceiver mWebViewUpdatedReceiver;
		private WebViewUtilityInterface mWebViewUtility;

		public WebViewUpdateService(Context context) {
		super(context);
		mWebViewUtility = new WebViewUtilityImpl();
		}

		@Override
		@@ -114,7 +116,7 @@ public class WebViewUpdateService extends SystemService {

		updateFallbackState(context, intent);

		for (WebViewProviderInfo provider : WebViewFactory.getWebViewPackages()) {
		for (WebViewProviderInfo provider : mWebViewUtility.getWebViewPackages()) {
		String webviewPackage = "package:" + provider.packageName;

		if (webviewPackage.equals(intent.getDataString())) {
		@@ -153,11 +155,7 @@ public class WebViewUpdateService extends SystemService {
		// package that was not the previous provider then we must kill
		// packages dependent on the old package ourselves. The framework
		// only kills dependents of packages that are being removed.
		try {
		ActivityManagerNative.getDefault().killPackageDependents(
		oldProviderName, UserHandle.USER_ALL);
		} catch (RemoteException e) {
		}
		mWebViewUtility.killPackageDependents(oldProviderName);
		}
		return;
		}
		@@ -170,7 +168,7 @@ public class WebViewUpdateService extends SystemService {
		filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
		filter.addDataScheme("package");
		// Make sure we only receive intents for WebView packages from our config file.
		for (WebViewProviderInfo provider : WebViewFactory.getWebViewPackages()) {
		for (WebViewProviderInfo provider : mWebViewUtility.getWebViewPackages()) {
		filter.addDataSchemeSpecificPart(provider.packageName, PatternMatcher.PATTERN_LITERAL);
		}
		getContext().registerReceiver(mWebViewUpdatedReceiver, filter);
		@@ -210,7 +208,7 @@ public class WebViewUpdateService extends SystemService {
		void handleNewUser(int userId) {
		if (!isFallbackLogicEnabled()) return;

		WebViewProviderInfo[] webviewProviders = WebViewFactory.getWebViewPackages();
		WebViewProviderInfo[] webviewProviders = mWebViewUtility.getWebViewPackages();
		WebViewProviderInfo fallbackProvider = getFallbackProvider(webviewProviders);
		if (fallbackProvider == null) return;
		boolean existsValidNonFallbackProvider =
		@@ -228,7 +226,7 @@ public class WebViewUpdateService extends SystemService {
		void updateFallbackState(final Context context, final Intent intent) {
		if (!isFallbackLogicEnabled()) return;

		WebViewProviderInfo[] webviewProviders = WebViewFactory.getWebViewPackages();
		WebViewProviderInfo[] webviewProviders = mWebViewUtility.getWebViewPackages();

		if (intent != null && (intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED)
		\|\| intent.getAction().equals(Intent.ACTION_PACKAGE_CHANGED))) {
		@@ -319,10 +317,10 @@ public class WebViewUpdateService extends SystemService {
		return false;
		}

		private static boolean isFallbackPackage(String packageName) {
		private boolean isFallbackPackage(String packageName) {
		if (packageName == null \|\| !isFallbackLogicEnabled()) return false;

		WebViewProviderInfo[] webviewPackages = WebViewFactory.getWebViewPackages();
		WebViewProviderInfo[] webviewPackages = mWebViewUtility.getWebViewPackages();
		WebViewProviderInfo fallbackProvider = getFallbackProvider(webviewPackages);
		return (fallbackProvider != null
		&& packageName.equals(fallbackProvider.packageName));
		@@ -359,13 +357,13 @@ public class WebViewUpdateService extends SystemService {
		PackageInfo newPackage = null;
		synchronized(this) {
		oldPackage = mCurrentWebViewPackage;
		updateUserSetting(newProviderName);
		mWebViewUtility.updateUserSetting(getContext(), newProviderName);

		try {
		newPackage = findPreferredWebViewPackage();
		if (oldPackage != null && newPackage.packageName.equals(oldPackage.packageName)) {
		// If we don't perform the user change, revert the settings change.
		updateUserSetting(newPackage.packageName);
		mWebViewUtility.updateUserSetting(getContext(), newPackage.packageName);
		return newPackage.packageName;
		}
		} catch (WebViewFactory.MissingWebViewPackageException e) {
		@@ -378,12 +376,8 @@ public class WebViewUpdateService extends SystemService {
		onWebViewProviderChanged(newPackage);
		}
		// Kill apps using the old provider
		try {
		if (oldPackage != null) {
		ActivityManagerNative.getDefault().killPackageDependents(
		oldPackage.packageName, UserHandle.USER_ALL);
		}
		} catch (RemoteException e) {
		mWebViewUtility.killPackageDependents(oldPackage.packageName);
		}
		return newPackage.packageName;
		}
		@@ -397,14 +391,14 @@ public class WebViewUpdateService extends SystemService {
		mAnyWebViewInstalled = true;
		if (mNumRelroCreationsStarted == mNumRelroCreationsFinished) {
		mCurrentWebViewPackage = newPackage;
		updateUserSetting(newPackage.packageName);
		mWebViewUtility.updateUserSetting(getContext(), newPackage.packageName);

		// The relro creations might 'finish' (not start at all) before
		// WebViewFactory.onWebViewProviderChanged which means we might not know the number
		// of started creations before they finish.
		mNumRelroCreationsStarted = NUMBER_OF_RELROS_UNKNOWN;
		mNumRelroCreationsFinished = 0;
		mNumRelroCreationsStarted = WebViewFactory.onWebViewProviderChanged(newPackage);
		mNumRelroCreationsStarted = mWebViewUtility.onWebViewProviderChanged(newPackage);
		// If the relro creations finish before we know the number of started creations we
		// will have to do any cleanup/notifying here.
		checkIfRelrosDoneLocked();
		@@ -421,7 +415,7 @@ public class WebViewUpdateService extends SystemService {
		* */
		private void updateValidWebViewPackages() {
		List<WebViewProviderInfo> webViewProviders =
		new ArrayList<WebViewProviderInfo>(Arrays.asList(WebViewFactory.getWebViewPackages()));
		new ArrayList<WebViewProviderInfo>(Arrays.asList(mWebViewUtility.getWebViewPackages()));
		Iterator<WebViewProviderInfo> it = webViewProviders.iterator();
		// remove non-valid packages
		while(it.hasNext()) {
		@@ -435,17 +429,6 @@ public class WebViewUpdateService extends SystemService {
		}
		}

		private static String getUserChosenWebViewProvider() {
		return Settings.Global.getString(AppGlobals.getInitialApplication().getContentResolver(),
		Settings.Global.WEBVIEW_PROVIDER);
		}

		private void updateUserSetting(String newProviderName) {
		Settings.Global.putString(getContext().getContentResolver(),
		Settings.Global.WEBVIEW_PROVIDER,
		newProviderName == null ? "" : newProviderName);
		}

		/**
		* Returns either the package info of the WebView provider determined in the following way:
		* If the user has chosen a provider then use that if it is valid,
		@@ -456,7 +439,7 @@ public class WebViewUpdateService extends SystemService {
		private PackageInfo findPreferredWebViewPackage() {
		WebViewProviderInfo[] providers = mCurrentValidWebViewPackages;

		String userChosenProvider = getUserChosenWebViewProvider();
		String userChosenProvider = mWebViewUtility.getUserChosenWebViewProvider(getContext());

		// If the user has chosen provider, use that
		for (WebViewProviderInfo provider : providers) {
		@@ -615,6 +598,11 @@ public class WebViewUpdateService extends SystemService {
		}
		}

		@Override // Binder call
		public WebViewProviderInfo[] getAllWebViewPackages() {
		return WebViewUpdateService.this.mWebViewUtility.getWebViewPackages();
		}

		@Override // Binder call
		public String getCurrentWebViewPackageName() {
		synchronized(WebViewUpdateService.this) {
		@@ -626,7 +614,7 @@ public class WebViewUpdateService extends SystemService {

		@Override // Binder call
		public boolean isFallbackPackage(String packageName) {
		return WebViewUpdateService.isFallbackPackage(packageName);
		return WebViewUpdateService.this.isFallbackPackage(packageName);
		}

		@Override // Binder call

services/core/java/com/android/server/webkit/WebViewUtilityImpl.java

0 → 100644

+161 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.server.webkit;

		import android.app.ActivityManagerNative;
		import android.app.AppGlobals;
		import android.content.Context;
		import android.content.pm.PackageInfo;
		import android.content.res.XmlResourceParser;
		import android.os.RemoteException;
		import android.os.UserHandle;
		import android.provider.Settings;
		import android.util.AndroidRuntimeException;
		import android.util.Log;
		import android.webkit.WebViewFactory;
		import android.webkit.WebViewFactory.MissingWebViewPackageException;
		import android.webkit.WebViewProviderInfo;

		import com.android.internal.util.XmlUtils;

		import java.io.IOException;
		import java.util.ArrayList;
		import java.util.List;

		import org.xmlpull.v1.XmlPullParserException;

		/**
		* Default implementation for the WebView preparation Utility interface.
		* @hide
		*/
		public class WebViewUtilityImpl implements WebViewUtilityInterface {
		private static final String TAG = WebViewUtilityImpl.class.getSimpleName();
		private static final String TAG_START = "webviewproviders";
		private static final String TAG_WEBVIEW_PROVIDER = "webviewprovider";
		private static final String TAG_PACKAGE_NAME = "packageName";
		private static final String TAG_DESCRIPTION = "description";
		// Whether or not the provider must be explicitly chosen by the user to be used.
		private static final String TAG_AVAILABILITY = "availableByDefault";
		private static final String TAG_SIGNATURE = "signature";
		private static final String TAG_FALLBACK = "isFallback";

		/**
		* Returns all packages declared in the framework resources as potential WebView providers.
		* @hide
		* */
		@Override
		public WebViewProviderInfo[] getWebViewPackages() {
		int numFallbackPackages = 0;
		XmlResourceParser parser = null;
		List<WebViewProviderInfo> webViewProviders = new ArrayList<WebViewProviderInfo>();
		try {
		parser = AppGlobals.getInitialApplication().getResources().getXml(
		com.android.internal.R.xml.config_webview_packages);
		XmlUtils.beginDocument(parser, TAG_START);
		while(true) {
		XmlUtils.nextElement(parser);
		String element = parser.getName();
		if (element == null) {
		break;
		}
		if (element.equals(TAG_WEBVIEW_PROVIDER)) {
		String packageName = parser.getAttributeValue(null, TAG_PACKAGE_NAME);
		if (packageName == null) {
		throw new MissingWebViewPackageException(
		"WebView provider in framework resources missing package name");
		}
		String description = parser.getAttributeValue(null, TAG_DESCRIPTION);
		if (description == null) {
		throw new MissingWebViewPackageException(
		"WebView provider in framework resources missing description");
		}
		boolean availableByDefault = "true".equals(
		parser.getAttributeValue(null, TAG_AVAILABILITY));
		boolean isFallback = "true".equals(
		parser.getAttributeValue(null, TAG_FALLBACK));
		WebViewProviderInfo currentProvider =
		new WebViewProviderInfo(packageName, description, availableByDefault,
		isFallback, readSignatures(parser));
		if (currentProvider.isFallbackPackage()) {
		numFallbackPackages++;
		if (numFallbackPackages > 1) {
		throw new AndroidRuntimeException(
		"There can be at most one webview fallback package.");
		}
		}
		webViewProviders.add(currentProvider);
		}
		else {
		Log.e(TAG, "Found an element that is not a webview provider");
		}
		}
		} catch(XmlPullParserException e) {
		throw new MissingWebViewPackageException("Error when parsing WebView meta data " + e);
		} catch(IOException e) {
		throw new MissingWebViewPackageException("Error when parsing WebView meta data " + e);
		} finally {
		if (parser != null) parser.close();
		}
		return webViewProviders.toArray(new WebViewProviderInfo[webViewProviders.size()]);
		}

		/**
		* Reads all signatures at the current depth (within the current provider) from the XML parser.
		*/
		private static String[] readSignatures(XmlResourceParser parser) throws IOException,
		XmlPullParserException {
		List<String> signatures = new ArrayList<String>();
		int outerDepth = parser.getDepth();
		while(XmlUtils.nextElementWithin(parser, outerDepth)) {
		if (parser.getName().equals(TAG_SIGNATURE)) {
		// Parse the value within the signature tag
		String signature = parser.nextText();
		signatures.add(signature);
		} else {
		Log.e(TAG, "Found an element in a webview provider that is not a signature");
		}
		}
		return signatures.toArray(new String[signatures.size()]);
		}

		@Override
		public int onWebViewProviderChanged(PackageInfo packageInfo) {
		return WebViewFactory.onWebViewProviderChanged(packageInfo);
		}

		@Override
		public String getUserChosenWebViewProvider(Context context) {
		return Settings.Global.getString(context.getContentResolver(),
		Settings.Global.WEBVIEW_PROVIDER);
		}

		@Override
		public void updateUserSetting(Context context, String newProviderName) {
		Settings.Global.putString(context.getContentResolver(),
		Settings.Global.WEBVIEW_PROVIDER,
		newProviderName == null ? "" : newProviderName);
		}

		@Override
		public void killPackageDependents(String packageName) {
		try {
		ActivityManagerNative.getDefault().killPackageDependents(packageName,
		UserHandle.USER_ALL);
		} catch (RemoteException e) {
		}
		}
		}