mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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697 lines
22 KiB
Java
697 lines
22 KiB
Java
// vim: ts=2:sw=2:expandtab:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Android Sync Client.
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*
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* The Initial Developer of the Original Code is
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* the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Richard Newman <rnewman@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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package org.mozilla.gecko.sync;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.util.HashMap;
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import java.util.Map;
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import org.json.simple.parser.ParseException;
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import org.mozilla.gecko.sync.crypto.CryptoException;
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import org.mozilla.gecko.sync.crypto.KeyBundle;
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import org.mozilla.gecko.sync.delegates.FreshStartDelegate;
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import org.mozilla.gecko.sync.delegates.GlobalSessionCallback;
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import org.mozilla.gecko.sync.delegates.InfoCollectionsDelegate;
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import org.mozilla.gecko.sync.delegates.KeyUploadDelegate;
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import org.mozilla.gecko.sync.delegates.MetaGlobalDelegate;
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import org.mozilla.gecko.sync.delegates.WipeServerDelegate;
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import org.mozilla.gecko.sync.net.SyncStorageRecordRequest;
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import org.mozilla.gecko.sync.net.SyncStorageRequest;
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import org.mozilla.gecko.sync.net.SyncStorageRequestDelegate;
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import org.mozilla.gecko.sync.net.SyncStorageResponse;
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import org.mozilla.gecko.sync.stage.AndroidBrowserBookmarksServerSyncStage;
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import org.mozilla.gecko.sync.stage.AndroidBrowserHistoryServerSyncStage;
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import org.mozilla.gecko.sync.stage.CheckPreconditionsStage;
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import org.mozilla.gecko.sync.stage.CompletedStage;
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import org.mozilla.gecko.sync.stage.EnsureClusterURLStage;
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import org.mozilla.gecko.sync.stage.EnsureKeysStage;
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import org.mozilla.gecko.sync.stage.FetchInfoCollectionsStage;
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import org.mozilla.gecko.sync.stage.FetchMetaGlobalStage;
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import org.mozilla.gecko.sync.stage.GlobalSyncStage;
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import org.mozilla.gecko.sync.stage.GlobalSyncStage.Stage;
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import org.mozilla.gecko.sync.stage.NoSuchStageException;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.os.Bundle;
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import android.util.Log;
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import ch.boye.httpclientandroidlib.HttpResponse;
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public class GlobalSession implements CredentialsSource, PrefsSource {
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private static final String LOG_TAG = "GlobalSession";
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public static final String API_VERSION = "1.1";
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public static final long STORAGE_VERSION = 5;
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private static final String HEADER_RETRY_AFTER = "retry-after";
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private static final String HEADER_X_WEAVE_BACKOFF = "x-weave-backoff";
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public SyncConfiguration config = null;
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protected Map<Stage, GlobalSyncStage> stages;
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public Stage currentState = Stage.idle;
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private GlobalSessionCallback callback;
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private Context context;
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/*
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* Key accessors.
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*/
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public void setCollectionKeys(CollectionKeys k) {
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config.setCollectionKeys(k);
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}
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@Override
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public CollectionKeys getCollectionKeys() {
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return config.collectionKeys;
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}
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@Override
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public KeyBundle keyForCollection(String collection) throws NoCollectionKeysSetException {
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return config.keyForCollection(collection);
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}
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/*
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* Config passthrough for convenience.
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*/
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@Override
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public String credentials() {
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return config.credentials();
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}
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public URI wboURI(String collection, String id) throws URISyntaxException {
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return config.wboURI(collection, id);
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}
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/*
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* Validators.
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*/
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private static boolean isInvalidString(String s) {
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return s == null ||
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s.trim().length() == 0;
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}
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private static boolean anyInvalidStrings(String s, String...strings) {
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if (isInvalidString(s)) {
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return true;
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}
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for (String str : strings) {
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if (isInvalidString(str)) {
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return true;
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}
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}
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return false;
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}
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public GlobalSession(String userAPI,
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String serverURL,
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String username,
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String password,
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String prefsPath,
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KeyBundle syncKeyBundle,
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GlobalSessionCallback callback,
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Context context,
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Bundle persisted)
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throws SyncConfigurationException, IllegalArgumentException, IOException, ParseException, NonObjectJSONException {
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if (callback == null) {
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throw new IllegalArgumentException("Must provide a callback to GlobalSession constructor.");
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}
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if (anyInvalidStrings(username, password)) {
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throw new SyncConfigurationException();
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}
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Log.i(LOG_TAG, "GlobalSession initialized with bundle " + persisted);
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URI serverURI;
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try {
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serverURI = (serverURL == null) ? null : new URI(serverURL);
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} catch (URISyntaxException e) {
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throw new SyncConfigurationException();
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}
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if (syncKeyBundle == null ||
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syncKeyBundle.getEncryptionKey() == null ||
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syncKeyBundle.getHMACKey() == null) {
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throw new SyncConfigurationException();
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}
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this.callback = callback;
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this.context = context;
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config = new SyncConfiguration(prefsPath, this);
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config.userAPI = userAPI;
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config.serverURL = serverURI;
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config.username = username;
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config.password = password;
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config.syncKeyBundle = syncKeyBundle;
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// clusterURL and syncID are set through `persisted`, or fetched from the server.
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assert(null == persisted);
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prepareStages();
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}
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protected void prepareStages() {
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stages = new HashMap<Stage, GlobalSyncStage>();
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stages.put(Stage.checkPreconditions, new CheckPreconditionsStage());
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stages.put(Stage.ensureClusterURL, new EnsureClusterURLStage());
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stages.put(Stage.fetchInfoCollections, new FetchInfoCollectionsStage());
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stages.put(Stage.fetchMetaGlobal, new FetchMetaGlobalStage());
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stages.put(Stage.ensureKeysStage, new EnsureKeysStage());
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// TODO: more stages.
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stages.put(Stage.syncBookmarks, new AndroidBrowserBookmarksServerSyncStage());
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stages.put(Stage.syncHistory, new AndroidBrowserHistoryServerSyncStage());
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stages.put(Stage.completed, new CompletedStage());
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}
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protected GlobalSyncStage getStageByName(Stage next) throws NoSuchStageException {
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GlobalSyncStage stage = stages.get(next);
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if (stage == null) {
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throw new NoSuchStageException(next);
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}
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return stage;
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}
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/**
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* Advance and loop around the stages of a sync.
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* @param current
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* @return
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*/
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public static Stage nextStage(Stage current) {
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int index = current.ordinal() + 1;
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int max = Stage.completed.ordinal() + 1;
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return Stage.values()[index % max];
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}
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/**
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* Move to the next stage in the syncing process.
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* @param next
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* The next stage.
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* @throws NoSuchStageException if the stage does not exist.
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*/
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public void advance() {
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this.callback.handleStageCompleted(this.currentState, this);
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Stage next = nextStage(this.currentState);
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GlobalSyncStage nextStage;
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try {
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nextStage = this.getStageByName(next);
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} catch (NoSuchStageException e) {
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this.abort(e, "No such stage " + next);
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return;
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}
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this.currentState = next;
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Log.i(LOG_TAG, "Running next stage " + next + " (" + nextStage + ")...");
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try {
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nextStage.execute(this);
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} catch (Exception ex) {
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Log.w(LOG_TAG, "Caught exception " + ex + " running stage " + next);
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this.abort(ex, "Uncaught exception in stage.");
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}
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}
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private String getSyncID() {
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return config.syncID;
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}
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private String generateSyncID() {
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config.syncID = Utils.generateGuid();
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return config.syncID;
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}
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/*
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* PrefsSource methods.
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*/
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@Override
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public SharedPreferences getPrefs(String name, int mode) {
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return this.getContext().getSharedPreferences(name, mode);
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}
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@Override
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public Context getContext() {
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return this.context;
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}
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/**
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* Begin a sync.
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*
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* The caller is responsible for:
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*
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* * Verifying that any backoffs/minimum next sync are respected
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* * Ensuring that the device is online
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* * Ensuring that dependencies are ready
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*
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* @throws AlreadySyncingException
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*
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*/
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public void start() throws AlreadySyncingException {
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if (this.currentState != GlobalSyncStage.Stage.idle) {
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throw new AlreadySyncingException(this.currentState);
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}
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this.advance();
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}
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/**
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* Stop this sync and start again.
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* @throws AlreadySyncingException
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*/
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protected void restart() throws AlreadySyncingException {
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this.currentState = GlobalSyncStage.Stage.idle;
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if (callback.shouldBackOff()) {
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this.callback.handleAborted(this, "Told to back off.");
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return;
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}
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this.start();
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}
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public void completeSync() {
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this.currentState = GlobalSyncStage.Stage.idle;
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this.callback.handleSuccess(this);
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}
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public void abort(Exception e, String reason) {
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Log.w(LOG_TAG, "Aborting sync: " + reason, e);
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this.callback.handleError(this, e);
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}
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public void handleHTTPError(SyncStorageResponse response, String reason) {
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// TODO: handling of 50x (backoff), 401 (node reassignment or auth error).
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// Fall back to aborting.
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Log.w(LOG_TAG, "Aborting sync due to HTTP " + response.getStatusCode());
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this.interpretHTTPFailure(response.httpResponse());
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this.abort(new HTTPFailureException(response), reason);
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}
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/**
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* Perform appropriate backoff etc. extraction.
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*/
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public void interpretHTTPFailure(HttpResponse response) {
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// TODO: handle permanent rejection.
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long retryAfter = 0;
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long weaveBackoff = 0;
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if (response.containsHeader(HEADER_RETRY_AFTER)) {
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// Handles non-decimals just fine.
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String headerValue = response.getFirstHeader(HEADER_RETRY_AFTER).getValue();
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retryAfter = Utils.decimalSecondsToMilliseconds(headerValue);
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}
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if (response.containsHeader(HEADER_X_WEAVE_BACKOFF)) {
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// Handles non-decimals just fine.
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String headerValue = response.getFirstHeader(HEADER_X_WEAVE_BACKOFF).getValue();
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weaveBackoff = Utils.decimalSecondsToMilliseconds(headerValue);
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}
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long backoff = Math.max(retryAfter, weaveBackoff);
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if (backoff > 0) {
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callback.requestBackoff(backoff);
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}
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}
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public void fetchMetaGlobal(MetaGlobalDelegate callback) throws URISyntaxException {
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if (this.config.metaGlobal == null) {
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this.config.metaGlobal = new MetaGlobal(config.metaURL(), credentials());
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}
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this.config.metaGlobal.fetch(callback);
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}
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public void fetchInfoCollections(InfoCollectionsDelegate callback) throws URISyntaxException {
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if (this.config.infoCollections == null) {
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this.config.infoCollections = new InfoCollections(config.infoURL(), credentials());
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}
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this.config.infoCollections.fetch(callback);
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}
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public void uploadKeys(CryptoRecord keysRecord,
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final KeyUploadDelegate keyUploadDelegate) {
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SyncStorageRecordRequest request;
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final GlobalSession self = this;
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try {
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request = new SyncStorageRecordRequest(this.config.keysURI());
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} catch (URISyntaxException e) {
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keyUploadDelegate.onKeyUploadFailed(e);
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return;
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}
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request.delegate = new SyncStorageRequestDelegate() {
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@Override
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public String ifUnmodifiedSince() {
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return null;
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}
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@Override
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public void handleRequestSuccess(SyncStorageResponse response) {
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keyUploadDelegate.onKeysUploaded();
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}
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@Override
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public void handleRequestFailure(SyncStorageResponse response) {
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self.interpretHTTPFailure(response.httpResponse());
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keyUploadDelegate.onKeyUploadFailed(new HTTPFailureException(response));
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}
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@Override
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public void handleRequestError(Exception ex) {
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keyUploadDelegate.onKeyUploadFailed(ex);
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}
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@Override
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public String credentials() {
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return self.credentials();
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}
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};
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keysRecord.setKeyBundle(config.syncKeyBundle);
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try {
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keysRecord.encrypt();
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} catch (UnsupportedEncodingException e) {
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keyUploadDelegate.onKeyUploadFailed(e);
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return;
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} catch (CryptoException e) {
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keyUploadDelegate.onKeyUploadFailed(e);
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return;
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}
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request.put(keysRecord);
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}
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/*
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* meta/global callbacks.
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*/
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public void processMetaGlobal(MetaGlobal global) {
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Long storageVersion = global.getStorageVersion();
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if (storageVersion < STORAGE_VERSION) {
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// Outdated server.
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freshStart();
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return;
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}
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if (storageVersion > STORAGE_VERSION) {
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// Outdated client!
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requiresUpgrade();
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return;
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}
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String remoteSyncID = global.getSyncID();
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if (remoteSyncID == null) {
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// Corrupt meta/global.
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freshStart();
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return;
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}
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String localSyncID = this.getSyncID();
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if (!remoteSyncID.equals(localSyncID)) {
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// Sync ID has changed. Reset timestamps and fetch new keys.
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resetClient();
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if (config.collectionKeys != null) {
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config.collectionKeys.clear();
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}
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config.syncID = remoteSyncID;
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// TODO TODO TODO
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}
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config.persistToPrefs();
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advance();
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}
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public void processMissingMetaGlobal(MetaGlobal global) {
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freshStart();
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}
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/**
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* Do a fresh start then quietly finish the sync, starting another.
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*/
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protected void freshStart() {
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final GlobalSession globalSession = this;
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freshStart(this, new FreshStartDelegate() {
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@Override
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public void onFreshStartFailed(Exception e) {
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globalSession.abort(e, "Fresh start failed.");
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}
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@Override
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public void onFreshStart() {
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try {
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globalSession.config.persistToPrefs();
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globalSession.restart();
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} catch (Exception e) {
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Log.w(LOG_TAG, "Got exception when restarting sync after freshStart.", e);
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globalSession.abort(e, "Got exception after freshStart.");
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}
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}
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});
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}
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/**
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* Clean the server, aborting the current sync.
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*/
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protected void freshStart(final GlobalSession session, final FreshStartDelegate freshStartDelegate) {
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final String newSyncID = session.generateSyncID();
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final String metaURL = session.config.metaURL();
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final String credentials = session.credentials();
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wipeServer(session, new WipeServerDelegate() {
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@Override
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public void onWiped(long timestamp) {
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session.resetClient();
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session.config.collectionKeys.clear(); // TODO: make sure we clear our keys timestamp.
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session.config.persistToPrefs();
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MetaGlobal mg = new MetaGlobal(metaURL, credentials);
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mg.setSyncID(newSyncID);
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mg.setStorageVersion(STORAGE_VERSION);
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// It would be good to set the X-If-Unmodified-Since header to `timestamp`
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// for this PUT to ensure at least some level of transactionality.
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// Unfortunately, the servers don't support it after a wipe right now
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// (bug 693893), so we're going to defer this until bug 692700.
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mg.upload(new MetaGlobalDelegate() {
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@Override
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public void handleSuccess(MetaGlobal global, SyncStorageResponse response) {
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session.config.metaGlobal = global;
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Log.i(LOG_TAG, "New meta/global uploaded with sync ID " + newSyncID);
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// Generate and upload new keys.
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try {
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session.uploadKeys(CollectionKeys.generateCollectionKeys().asCryptoRecord(), new KeyUploadDelegate() {
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@Override
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public void onKeysUploaded() {
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// Now we can download them.
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freshStartDelegate.onFreshStart();
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}
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@Override
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public void onKeyUploadFailed(Exception e) {
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Log.e(LOG_TAG, "Got exception uploading new keys.", e);
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freshStartDelegate.onFreshStartFailed(e);
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}
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});
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} catch (NoCollectionKeysSetException e) {
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Log.e(LOG_TAG, "Got exception generating new keys.", e);
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freshStartDelegate.onFreshStartFailed(e);
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} catch (CryptoException e) {
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Log.e(LOG_TAG, "Got exception generating new keys.", e);
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freshStartDelegate.onFreshStartFailed(e);
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}
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}
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@Override
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public void handleMissing(MetaGlobal global, SyncStorageResponse response) {
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// Shouldn't happen.
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Log.w(LOG_TAG, "Got 'missing' response uploading new meta/global.");
|
|
freshStartDelegate.onFreshStartFailed(new Exception("meta/global missing"));
|
|
}
|
|
|
|
@Override
|
|
public void handleFailure(SyncStorageResponse response) {
|
|
// TODO: respect backoffs etc.
|
|
Log.w(LOG_TAG, "Got failure " + response.getStatusCode() + " uploading new meta/global.");
|
|
session.interpretHTTPFailure(response.httpResponse());
|
|
freshStartDelegate.onFreshStartFailed(new HTTPFailureException(response));
|
|
}
|
|
|
|
@Override
|
|
public void handleError(Exception e) {
|
|
Log.w(LOG_TAG, "Got error uploading new meta/global.", e);
|
|
freshStartDelegate.onFreshStartFailed(e);
|
|
}
|
|
|
|
@Override
|
|
public MetaGlobalDelegate deferred() {
|
|
final MetaGlobalDelegate self = this;
|
|
return new MetaGlobalDelegate() {
|
|
|
|
@Override
|
|
public void handleSuccess(final MetaGlobal global, final SyncStorageResponse response) {
|
|
ThreadPool.run(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
self.handleSuccess(global, response);
|
|
}});
|
|
}
|
|
|
|
@Override
|
|
public void handleMissing(final MetaGlobal global, final SyncStorageResponse response) {
|
|
ThreadPool.run(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
self.handleMissing(global, response);
|
|
}});
|
|
}
|
|
|
|
@Override
|
|
public void handleFailure(final SyncStorageResponse response) {
|
|
ThreadPool.run(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
self.handleFailure(response);
|
|
}});
|
|
}
|
|
|
|
@Override
|
|
public void handleError(final Exception e) {
|
|
ThreadPool.run(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
self.handleError(e);
|
|
}});
|
|
}
|
|
|
|
@Override
|
|
public MetaGlobalDelegate deferred() {
|
|
return this;
|
|
}
|
|
};
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public void onWipeFailed(Exception e) {
|
|
Log.w(LOG_TAG, "Wipe failed.");
|
|
freshStartDelegate.onFreshStartFailed(e);
|
|
}
|
|
});
|
|
|
|
}
|
|
|
|
private void wipeServer(final CredentialsSource credentials, final WipeServerDelegate wipeDelegate) {
|
|
SyncStorageRequest request;
|
|
final GlobalSession self = this;
|
|
|
|
try {
|
|
request = new SyncStorageRequest(config.storageURL(false));
|
|
} catch (URISyntaxException ex) {
|
|
Log.w(LOG_TAG, "Invalid URI in wipeServer.");
|
|
wipeDelegate.onWipeFailed(ex);
|
|
return;
|
|
}
|
|
|
|
request.delegate = new SyncStorageRequestDelegate() {
|
|
|
|
@Override
|
|
public String ifUnmodifiedSince() {
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public void handleRequestSuccess(SyncStorageResponse response) {
|
|
wipeDelegate.onWiped(response.normalizedWeaveTimestamp());
|
|
}
|
|
|
|
@Override
|
|
public void handleRequestFailure(SyncStorageResponse response) {
|
|
Log.w(LOG_TAG, "Got request failure " + response.getStatusCode() + " in wipeServer.");
|
|
// Process HTTP failures here to pick up backoffs, etc.
|
|
self.interpretHTTPFailure(response.httpResponse());
|
|
wipeDelegate.onWipeFailed(new HTTPFailureException(response));
|
|
}
|
|
|
|
@Override
|
|
public void handleRequestError(Exception ex) {
|
|
Log.w(LOG_TAG, "Got exception in wipeServer.", ex);
|
|
wipeDelegate.onWipeFailed(ex);
|
|
}
|
|
|
|
@Override
|
|
public String credentials() {
|
|
return credentials.credentials();
|
|
}
|
|
};
|
|
request.delete();
|
|
}
|
|
|
|
/**
|
|
* Reset our state. Clear our sync ID, reset each engine, drop any
|
|
* cached records.
|
|
*/
|
|
private void resetClient() {
|
|
// TODO: futz with config?!
|
|
// TODO: engines?!
|
|
|
|
}
|
|
|
|
/**
|
|
* Suggest that your Sync client needs to be upgraded to work
|
|
* with this server.
|
|
*/
|
|
public void requiresUpgrade() {
|
|
Log.i(LOG_TAG, "Client outdated storage version; requires update.");
|
|
// TODO: notify UI.
|
|
}
|
|
|
|
/**
|
|
* If meta/global is missing or malformed, throws a MetaGlobalException.
|
|
* Otherwise, returns true if there is an entry for this engine in the
|
|
* meta/global "engines" object.
|
|
*
|
|
* @param engineName
|
|
* @return
|
|
* @throws MetaGlobalException
|
|
*/
|
|
public boolean engineIsEnabled(String engineName) throws MetaGlobalException {
|
|
if (this.config.metaGlobal == null) {
|
|
throw new MetaGlobalNotSetException();
|
|
}
|
|
if (this.config.metaGlobal.engines == null) {
|
|
throw new MetaGlobalMissingEnginesException();
|
|
}
|
|
return this.config.metaGlobal.engines.get(engineName) != null;
|
|
}
|
|
}
|