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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 package org.chromium.minting; | |
| 6 | |
| 7 import android.app.Service; | |
| 8 import android.content.Context; | |
| 9 import android.content.Intent; | |
| 10 import android.content.SharedPreferences; | |
| 11 import android.content.pm.PackageInfo; | |
| 12 import android.content.pm.PackageManager; | |
| 13 import android.os.Bundle; | |
| 14 import android.os.IBinder; | |
| 15 import android.util.Log; | |
| 16 | |
| 17 import org.chromium.minting.lib.common.WebApkUtils; | |
| 18 | |
| 19 import java.io.File; | |
| 20 import java.lang.reflect.Constructor; | |
| 21 import java.util.Scanner; | |
| 22 | |
| 23 /** | |
| 24 * Shell class for services provided by Web APK to Chrome. Extracts code with im
plementation of | |
| 25 * services from .dex file in Chrome APK. | |
| 26 */ | |
| 27 public class WebApkServiceFactory extends Service { | |
| 28 private static final String TAG = "cr.WebApkServiceFactory"; | |
| 29 | |
| 30 /** | |
| 31 * Name of the class with IBinder API implementation. | |
| 32 */ | |
| 33 private static final String MINTED_SERVICE_IMPL_CLASS_NAME = | |
| 34 "org.chromium.minting.libs.runtime_library.WebApkServiceImpl"; | |
| 35 | |
| 36 private static final String KEY_APP_ICON_ID = "app_icon_id"; | |
| 37 private static final String KEY_EXPECTED_HOST_BROWSER = "expected_host_brows
er"; | |
| 38 | |
| 39 /** | |
| 40 * Name of the shared preferences file. | |
| 41 */ | |
| 42 private static final String PREF_FILE_NAME = "MINT_PREFS"; | |
| 43 | |
| 44 /** | |
| 45 * Name of the shared preference for Chrome's version code. | |
| 46 */ | |
| 47 private static final String REMOTE_VERSION_CODE_PREF = | |
| 48 "minting_service_factory_remote_version_code"; | |
| 49 | |
| 50 /** | |
| 51 * Name of the shared preference for the version number of the dynamically l
oaded dex. | |
| 52 */ | |
| 53 private static final String RUNTIME_DEX_VERSION_PREF = | |
| 54 "minting_service_factory_runtime_dex_version"; | |
| 55 | |
| 56 /* | |
| 57 * ClassLoader for loading {@link MINTED_SERVICE_IMPL_CLASS_NAME}. Static so
that all | |
| 58 * {@link WebApkServiceFactory} service instatiations use the same ClassLoad
er during the app's | |
| 59 * lifetime. | |
| 60 */ | |
| 61 private static ClassLoader sClassLoader; | |
| 62 | |
| 63 @Override | |
| 64 public IBinder onBind(Intent intent) { | |
| 65 if (sClassLoader == null) { | |
| 66 sClassLoader = createClassLoader(this); | |
| 67 if (sClassLoader == null) { | |
| 68 Log.w(TAG, "Unable to create ClassLoader."); | |
| 69 return null; | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 try { | |
| 74 Class<?> mintedServiceImplClass = | |
| 75 sClassLoader.loadClass(MINTED_SERVICE_IMPL_CLASS_NAME); | |
| 76 Constructor<?> mintedServiceImplConstructor = | |
| 77 mintedServiceImplClass.getConstructor(Context.class, Bundle.
class); | |
| 78 String expectedHostPackageName = WebApkUtils.getHostBrowserPackageNa
me(this); | |
| 79 Bundle bundle = new Bundle(); | |
| 80 bundle.putInt(KEY_APP_ICON_ID, R.drawable.app_icon); | |
| 81 bundle.putString(KEY_EXPECTED_HOST_BROWSER, expectedHostPackageName)
; | |
| 82 return (IBinder) mintedServiceImplConstructor.newInstance(new Object
[] {this, bundle}); | |
| 83 } catch (Exception e) { | |
| 84 Log.w(TAG, "Unable to create WebApkServiceImpl."); | |
| 85 e.printStackTrace(); | |
| 86 return null; | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 /** | |
| 91 * Creates ClassLoader for loading {@link MINTED_SERVICE_IMPL_CLASS_NAME}. | |
| 92 * @param context WebAPK's context. | |
| 93 * @return The ClassLoader. | |
| 94 */ | |
| 95 private static ClassLoader createClassLoader(Context context) { | |
| 96 Context remoteContext = WebApkUtils.getHostBrowserContext(context); | |
| 97 if (remoteContext == null) { | |
| 98 Log.w(TAG, "Failed to get remote context."); | |
| 99 return null; | |
| 100 } | |
| 101 | |
| 102 SharedPreferences preferences = context.getSharedPreferences(PREF_FILE_N
AME, MODE_PRIVATE); | |
| 103 | |
| 104 int runtimeDexVersion = preferences.getInt(RUNTIME_DEX_VERSION_PREF, -1)
; | |
| 105 int newRuntimeDexVersion = checkForNewRuntimeDexVersion(preferences, rem
oteContext); | |
| 106 if (newRuntimeDexVersion == -1) { | |
| 107 newRuntimeDexVersion = runtimeDexVersion; | |
| 108 } | |
| 109 File localDexDir = context.getDir("dex", Context.MODE_PRIVATE); | |
| 110 if (newRuntimeDexVersion != runtimeDexVersion) { | |
| 111 Log.w(TAG, "Delete cached dex files."); | |
| 112 DexLoader.deleteCachedDexes(localDexDir); | |
| 113 } | |
| 114 | |
| 115 String dexAssetName = WebApkUtils.getRuntimeDexName(newRuntimeDexVersion
); | |
| 116 File remoteDexFile = | |
| 117 new File(remoteContext.getDir("dex", Context.MODE_PRIVATE), dexA
ssetName); | |
| 118 return DexLoader.load(remoteContext, dexAssetName, MINTED_SERVICE_IMPL_C
LASS_NAME, | |
| 119 remoteDexFile, localDexDir); | |
| 120 } | |
| 121 | |
| 122 /** | |
| 123 * Checks if there is a new "runtime dex" version number. If there is a new
version number, | |
| 124 * updates SharedPreferences. | |
| 125 * @param preferences WebAPK's SharedPreferences. | |
| 126 * @param remoteContext | |
| 127 * @return The new "runtime dex" version number. -1 if there is no new versi
on number. | |
| 128 */ | |
| 129 private static int checkForNewRuntimeDexVersion( | |
| 130 SharedPreferences preferences, Context remoteContext) { | |
| 131 // The "runtime dex" version only changes when {@link remoteContext}'s A
PK version code | |
| 132 // changes. Checking the APK's version code is less expensive than readi
ng from the APK's | |
| 133 // assets. | |
| 134 PackageInfo remotePackageInfo = null; | |
| 135 try { | |
| 136 remotePackageInfo = remoteContext.getPackageManager().getPackageInfo
( | |
| 137 remoteContext.getPackageName(), 0); | |
| 138 } catch (PackageManager.NameNotFoundException e) { | |
| 139 Log.e(TAG, "Failed to get remote package info."); | |
| 140 return -1; | |
| 141 } | |
| 142 | |
| 143 int cachedRemoteVersionCode = preferences.getInt(REMOTE_VERSION_CODE_PRE
F, -1); | |
| 144 if (cachedRemoteVersionCode == remotePackageInfo.versionCode) { | |
| 145 return -1; | |
| 146 } | |
| 147 | |
| 148 int runtimeDexVersion = readAssetContentsToInt(remoteContext, "web_apk_d
ex_version.txt"); | |
| 149 SharedPreferences.Editor editor = preferences.edit(); | |
| 150 editor.putInt(REMOTE_VERSION_CODE_PREF, remotePackageInfo.versionCode); | |
| 151 editor.putInt(RUNTIME_DEX_VERSION_PREF, runtimeDexVersion); | |
| 152 editor.apply(); | |
| 153 return runtimeDexVersion; | |
| 154 } | |
| 155 | |
| 156 /** | |
| 157 * Returns the first integer in an asset file's contents. | |
| 158 * @param context | |
| 159 * @param assetName The name of the asset. | |
| 160 */ | |
| 161 private static int readAssetContentsToInt(Context context, String assetName)
{ | |
| 162 try (Scanner scanner = new Scanner(context.getAssets().open(assetName)))
{ | |
| 163 return scanner.nextInt(); | |
| 164 } catch (Exception e) { | |
| 165 return -1; | |
| 166 } | |
| 167 } | |
| 168 } | |
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Chromium Code Reviews
Issue 1945303005:
Change webapk packages and directory structure (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master