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/** * Copyright 2010-present Facebook./*w w w . j a va 2 s . c om*/ * * 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.facebook.internal; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.net.Uri; import android.os.Bundle; import android.os.Parcelable; import android.provider.Settings.Secure; import android.text.TextUtils; import android.util.Log; import android.webkit.CookieManager; import android.webkit.CookieSyncManager; import com.facebook.FacebookException; import com.facebook.Request; import com.facebook.Settings; import com.facebook.android.BuildConfig; import com.facebook.model.GraphObject; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.json.JSONTokener; import java.io.*; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.net.HttpURLConnection; import java.net.URLConnection; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.*; import java.util.concurrent.ConcurrentHashMap; /** * com.facebook.internal is solely for the use of other packages within the Facebook SDK for Android. Use of * any of the classes in this package is unsupported, and they may be modified or removed without warning at * any time. */ public final class Utility { static final String LOG_TAG = "FacebookSDK"; private static final String HASH_ALGORITHM_MD5 = "MD5"; private static final String HASH_ALGORITHM_SHA1 = "SHA-1"; private static final String URL_SCHEME = "https"; private static final String SUPPORTS_ATTRIBUTION = "supports_attribution"; private static final String SUPPORTS_IMPLICIT_SDK_LOGGING = "supports_implicit_sdk_logging"; private static final String NUX_CONTENT = "gdpv4_nux_content"; private static final String NUX_ENABLED = "gdpv4_nux_enabled"; private static final String EXTRA_APP_EVENTS_INFO_FORMAT_VERSION = "a1"; private static final String [] APP_SETTING_FIELDS = new String[] { SUPPORTS_ATTRIBUTION, SUPPORTS_IMPLICIT_SDK_LOGGING, NUX_CONTENT, NUX_ENABLED }; private static final String APPLICATION_FIELDS = "fields"; // This is the default used by the buffer streams, but they trace a warning if you do not specify. public static final int DEFAULT_STREAM_BUFFER_SIZE = 8192; private static Map<String, FetchedAppSettings> fetchedAppSettings = new ConcurrentHashMap<String, FetchedAppSettings>(); public static class FetchedAppSettings { private boolean supportsAttribution; private boolean supportsImplicitLogging; private String nuxContent; private boolean nuxEnabled; private FetchedAppSettings(boolean supportsAttribution, boolean supportsImplicitLogging, String nuxContent, boolean nuxEnabled) { this.supportsAttribution = supportsAttribution; this.supportsImplicitLogging = supportsImplicitLogging; this.nuxContent = nuxContent; this.nuxEnabled = nuxEnabled; } public boolean supportsAttribution() { return supportsAttribution; } public boolean supportsImplicitLogging() { return supportsImplicitLogging; } public String getNuxContent() { return nuxContent; } public boolean getNuxEnabled() { return nuxEnabled; } } // Returns true iff all items in subset are in superset, treating null and // empty collections as // the same. public static <T> boolean isSubset(Collection<T> subset, Collection<T> superset) { if ((superset == null) || (superset.size() == 0)) { return ((subset == null) || (subset.size() == 0)); } HashSet<T> hash = new HashSet<T>(superset); for (T t : subset) { if (!hash.contains(t)) { return false; } } return true; } public static <T> boolean isNullOrEmpty(Collection<T> c) { return (c == null) || (c.size() == 0); } public static boolean isNullOrEmpty(String s) { return (s == null) || (s.length() == 0); } public static <T> Collection<T> unmodifiableCollection(T... ts) { return Collections.unmodifiableCollection(Arrays.asList(ts)); } public static <T> ArrayList<T> arrayList(T... ts) { ArrayList<T> arrayList = new ArrayList<T>(ts.length); for (T t : ts) { arrayList.add(t); } return arrayList; } static String md5hash(String key) { return hashWithAlgorithm(HASH_ALGORITHM_MD5, key); } static String sha1hash(String key) { return hashWithAlgorithm(HASH_ALGORITHM_SHA1, key); } static String sha1hash(byte[] bytes) { return hashWithAlgorithm(HASH_ALGORITHM_SHA1, bytes); } private static String hashWithAlgorithm(String algorithm, String key) { return hashWithAlgorithm(algorithm, key.getBytes()); } private static String hashWithAlgorithm(String algorithm, byte[] bytes) { MessageDigest hash; try { hash = MessageDigest.getInstance(algorithm); } catch (NoSuchAlgorithmException e) { return null; } return hashBytes(hash, bytes); } private static String hashBytes(MessageDigest hash, byte[] bytes) { hash.update(bytes); byte[] digest = hash.digest(); StringBuilder builder = new StringBuilder(); for (int b : digest) { builder.append(Integer.toHexString((b >> 4) & 0xf)); builder.append(Integer.toHexString((b >> 0) & 0xf)); } return builder.toString(); } public static Uri buildUri(String authority, String path, Bundle parameters) { Uri.Builder builder = new Uri.Builder(); builder.scheme(URL_SCHEME); builder.authority(authority); builder.path(path); for (String key : parameters.keySet()) { Object parameter = parameters.get(key); if (parameter instanceof String) { builder.appendQueryParameter(key, (String) parameter); } } return builder.build(); } public static void putObjectInBundle(Bundle bundle, String key, Object value) { if (value instanceof String) { bundle.putString(key, (String) value); } else if (value instanceof Parcelable) { bundle.putParcelable(key, (Parcelable) value); } else if (value instanceof byte[]) { bundle.putByteArray(key, (byte[]) value); } else { throw new FacebookException("attempted to add unsupported type to Bundle"); } } public static void closeQuietly(Closeable closeable) { try { if (closeable != null) { closeable.close(); } } catch (IOException ioe) { // ignore } } public static void disconnectQuietly(URLConnection connection) { if (connection instanceof HttpURLConnection) { ((HttpURLConnection)connection).disconnect(); } } public static String getMetadataApplicationId(Context context) { Validate.notNull(context, "context"); Settings.loadDefaultsFromMetadata(context); return Settings.getApplicationId(); } static Map<String, Object> convertJSONObjectToHashMap(JSONObject jsonObject) { HashMap<String, Object> map = new HashMap<String, Object>(); JSONArray keys = jsonObject.names(); for (int i = 0; i < keys.length(); ++i) { String key; try { key = keys.getString(i); Object value = jsonObject.get(key); if (value instanceof JSONObject) { value = convertJSONObjectToHashMap((JSONObject) value); } map.put(key, value); } catch (JSONException e) { } } return map; } // Returns either a JSONObject or JSONArray representation of the 'key' property of 'jsonObject'. public static Object getStringPropertyAsJSON(JSONObject jsonObject, String key, String nonJSONPropertyKey) throws JSONException { Object value = jsonObject.opt(key); if (value != null && value instanceof String) { JSONTokener tokener = new JSONTokener((String) value); value = tokener.nextValue(); } if (value != null && !(value instanceof JSONObject || value instanceof JSONArray)) { if (nonJSONPropertyKey != null) { // Facebook sometimes gives us back a non-JSON value such as // literal "true" or "false" as a result. // If we got something like that, we present it to the caller as // a GraphObject with a single // property. We only do this if the caller wants that behavior. jsonObject = new JSONObject(); jsonObject.putOpt(nonJSONPropertyKey, value); return jsonObject; } else { throw new FacebookException("Got an unexpected non-JSON object."); } } return value; } public static String readStreamToString(InputStream inputStream) throws IOException { BufferedInputStream bufferedInputStream = null; InputStreamReader reader = null; try { bufferedInputStream = new BufferedInputStream(inputStream); reader = new InputStreamReader(bufferedInputStream); StringBuilder stringBuilder = new StringBuilder(); final int bufferSize = 1024 * 2; char[] buffer = new char[bufferSize]; int n = 0; while ((n = reader.read(buffer)) != -1) { stringBuilder.append(buffer, 0, n); } return stringBuilder.toString(); } finally { closeQuietly(bufferedInputStream); closeQuietly(reader); } } public static boolean stringsEqualOrEmpty(String a, String b) { boolean aEmpty = TextUtils.isEmpty(a); boolean bEmpty = TextUtils.isEmpty(b); if (aEmpty && bEmpty) { // Both null or empty, they match. return true; } if (!aEmpty && !bEmpty) { // Both non-empty, check equality. return a.equals(b); } // One empty, one non-empty, can't match. return false; } private static void clearCookiesForDomain(Context context, String domain) { // This is to work around a bug where CookieManager may fail to instantiate if CookieSyncManager // has never been created. CookieSyncManager syncManager = CookieSyncManager.createInstance(context); syncManager.sync(); CookieManager cookieManager = CookieManager.getInstance(); String cookies = cookieManager.getCookie(domain); if (cookies == null) { return; } String[] splitCookies = cookies.split(";"); for (String cookie : splitCookies) { String[] cookieParts = cookie.split("="); if (cookieParts.length > 0) { String newCookie = cookieParts[0].trim() + "=;expires=Sat, 1 Jan 2000 00:00:01 UTC;"; cookieManager.setCookie(domain, newCookie); } } cookieManager.removeExpiredCookie(); } public static void clearFacebookCookies(Context context) { // setCookie acts differently when trying to expire cookies between builds of Android that are using // Chromium HTTP stack and those that are not. Using both of these domains to ensure it works on both. clearCookiesForDomain(context, "facebook.com"); clearCookiesForDomain(context, ".facebook.com"); clearCookiesForDomain(context, "https://facebook.com"); clearCookiesForDomain(context, "https://.facebook.com"); } public static void logd(String tag, Exception e) { if (Settings.isLoggingEnabled() && tag != null && e != null) { Log.d(tag, e.getClass().getSimpleName() + ": " + e.getMessage()); } } public static void logd(String tag, String msg) { if (Settings.isLoggingEnabled() && tag != null && msg != null) { Log.d(tag, msg); } } public static <T> boolean areObjectsEqual(T a, T b) { if (a == null) { return b == null; } return a.equals(b); } // Note that this method makes a synchronous Graph API call, so should not be called from the main thread. public static FetchedAppSettings queryAppSettings(final String applicationId, final boolean forceRequery) { // Cache the last app checked results. if (!forceRequery && fetchedAppSettings.containsKey(applicationId)) { return fetchedAppSettings.get(applicationId); } Bundle appSettingsParams = new Bundle(); appSettingsParams.putString(APPLICATION_FIELDS, TextUtils.join(",", APP_SETTING_FIELDS)); Request request = Request.newGraphPathRequest(null, applicationId, null); request.setParameters(appSettingsParams); GraphObject supportResponse = request.executeAndWait().getGraphObject(); FetchedAppSettings result = new FetchedAppSettings( safeGetBooleanFromResponse(supportResponse, SUPPORTS_ATTRIBUTION), safeGetBooleanFromResponse(supportResponse, SUPPORTS_IMPLICIT_SDK_LOGGING), safeGetStringFromResponse(supportResponse, NUX_CONTENT), safeGetBooleanFromResponse(supportResponse, NUX_ENABLED) ); fetchedAppSettings.put(applicationId, result); return result; } private static boolean safeGetBooleanFromResponse(GraphObject response, String propertyName) { Object result = false; if (response != null) { result = response.getProperty(propertyName); } if (!(result instanceof Boolean)) { result = false; } return (Boolean) result; } private static String safeGetStringFromResponse(GraphObject response, String propertyName) { Object result = ""; if (response != null) { result = response.getProperty(propertyName); } if (!(result instanceof String)) { result = ""; } return (String) result; } public static void clearCaches(Context context) { ImageDownloader.clearCache(context); } public static void deleteDirectory(File directoryOrFile) { if (!directoryOrFile.exists()) { return; } if (directoryOrFile.isDirectory()) { for (File child : directoryOrFile.listFiles()) { deleteDirectory(child); } } directoryOrFile.delete(); } public static <T> List<T> asListNoNulls(T... array) { ArrayList<T> result = new ArrayList<T>(); for (T t : array) { if (t != null) { result.add(t); } } return result; } // Return a hash of the android_id combined with the appid. Intended to dedupe requests on the server side // in order to do counting of users unknown to Facebook. Because we put the appid into the key prior to hashing, // we cannot do correlation of the same user across multiple apps -- this is intentional. When we transition to // the Google advertising ID, we'll get rid of this and always send that up. public static String getHashedDeviceAndAppID(Context context, String applicationId) { String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID); if (androidId == null) { return null; } else { return sha1hash(androidId + applicationId); } } public static void setAppEventAttributionParameters(GraphObject params, AttributionIdentifiers attributionIdentifiers, String hashedDeviceAndAppId, boolean limitEventUsage) { // Send attributionID if it exists, otherwise send a hashed device+appid specific value as the advertiser_id. if (attributionIdentifiers != null && attributionIdentifiers.getAttributionId() != null) { params.setProperty("attribution", attributionIdentifiers.getAttributionId()); } if (attributionIdentifiers != null && attributionIdentifiers.getAndroidAdvertiserId() != null) { params.setProperty("advertiser_id", attributionIdentifiers.getAndroidAdvertiserId()); params.setProperty("advertiser_tracking_enabled", !attributionIdentifiers.isTrackingLimited()); } else if (hashedDeviceAndAppId != null) { params.setProperty("advertiser_id", hashedDeviceAndAppId); } params.setProperty("application_tracking_enabled", !limitEventUsage); } public static void setAppEventExtendedDeviceInfoParameters(GraphObject params, Context appContext) { JSONArray extraInfoArray = new JSONArray(); extraInfoArray.put(EXTRA_APP_EVENTS_INFO_FORMAT_VERSION); // Application Manifest info: String pkgName = appContext.getPackageName(); int versionCode = -1; String versionName = ""; try { PackageInfo pi = appContext.getPackageManager().getPackageInfo(pkgName, 0); versionCode = pi.versionCode; versionName = pi.versionName; } catch (PackageManager.NameNotFoundException e) { // Swallow } // Application Manifest info: extraInfoArray.put(pkgName); extraInfoArray.put(versionCode); extraInfoArray.put(versionName); params.setProperty("extinfo", extraInfoArray.toString()); } public static Method getMethodQuietly(Class<?> clazz, String methodName, Class<?>... parameterTypes) { try { return clazz.getMethod(methodName, parameterTypes); } catch (NoSuchMethodException ex) { return null; } } public static Method getMethodQuietly(String className, String methodName, Class<?>... parameterTypes) { try { Class<?> clazz = Class.forName(className); return getMethodQuietly(clazz, methodName, parameterTypes); } catch (ClassNotFoundException ex) { return null; } } public static Object invokeMethodQuietly(Object receiver, Method method, Object... args) { try { return method.invoke(receiver, args); } catch (IllegalAccessException ex) { return null; } catch (InvocationTargetException ex) { return null; } } /** * Returns the name of the current activity if the context is an activity, otherwise return "unknown" */ public static String getActivityName(Context context) { if (context == null) { return "null"; } else if (context == context.getApplicationContext()) { return "unknown"; } else { return context.getClass().getSimpleName(); } } }