mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
764 lines
25 KiB
Java
764 lines
25 KiB
Java
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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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.List;
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import java.util.Map;
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import java.util.concurrent.atomic.AtomicLong;
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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.ClientsDataDelegate;
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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.BaseResource;
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import org.mozilla.gecko.sync.net.HttpResponseObserver;
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import org.mozilla.gecko.sync.net.SyncResponse;
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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.FennecTabsServerSyncStage;
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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 org.mozilla.gecko.sync.stage.SyncClientsEngineStage;
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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, HttpResponseObserver {
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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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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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public final GlobalSessionCallback callback;
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private Context context;
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private ClientsDataDelegate clientsDelegate;
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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 extras,
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ClientsDataDelegate clientsDelegate)
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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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Logger.info(LOG_TAG, "GlobalSession initialized with bundle " + extras);
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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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this.clientsDelegate = clientsDelegate;
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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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registerCommands();
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prepareStages();
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}
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protected void registerCommands() {
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CommandProcessor processor = CommandProcessor.getProcessor();
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processor.registerCommand("resetEngine", new CommandRunner() {
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@Override
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public void executeCommand(List<String> args) {
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resetClient(new String[] { args.get(0) });
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}
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});
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processor.registerCommand("resetAll", new CommandRunner() {
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@Override
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public void executeCommand(List<String> args) {
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resetClient(null);
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}
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});
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processor.registerCommand("displayURI", new CommandRunner() {
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@Override
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public void executeCommand(List<String> args) {
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CommandProcessor.getProcessor().displayURI(args, getContext());
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}
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});
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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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stages.put(Stage.syncClientsEngine, new SyncClientsEngineStage());
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// TODO: more stages.
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stages.put(Stage.syncTabs, new FennecTabsServerSyncStage());
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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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* The next stage to execute.
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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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*/
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public void advance() {
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// If we have a backoff, request a backoff and don't advance to next stage.
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long existingBackoff = largestBackoffObserved.get();
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if (existingBackoff > 0) {
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this.abort(null, "Aborting sync because of backoff of " + existingBackoff + " milliseconds.");
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return;
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}
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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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Logger.info(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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Logger.warn(LOG_TAG, "Caught exception " + ex + " running stage " + next);
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this.abort(ex, "Uncaught exception in stage.");
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return;
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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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* <p>
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* The caller is responsible for:
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* <ul>
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* <li>Verifying that any backoffs/minimum next sync requests are respected.</li>
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* <li>Ensuring that the device is online.</li>
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* <li>Ensuring that dependencies are ready.</li>
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* </ul>
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*
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* @throws AlreadySyncingException
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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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installAsHttpResponseObserver(); // Uninstalled by completeSync or abort.
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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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uninstallAsHttpResponseObserver();
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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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Logger.warn(LOG_TAG, "Aborting sync: " + reason, e);
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uninstallAsHttpResponseObserver();
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long existingBackoff = largestBackoffObserved.get();
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if (existingBackoff > 0) {
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callback.requestBackoff(existingBackoff);
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}
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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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Logger.warn(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 responseBackoff = (new SyncResponse(response)).totalBackoffInMilliseconds();
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if (responseBackoff > 0) {
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callback.requestBackoff(responseBackoff);
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}
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if (response.getStatusLine() != null && response.getStatusLine().getStatusCode() == 401) {
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/*
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* Alert our callback we have a 401 on a cluster URL. This GlobalSession
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* will fail, but the next one will fetch a new cluster URL and will
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* distinguish between "node reassignment" and "user password changed".
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*/
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callback.informUnauthorizedResponse(this, config.getClusterURL());
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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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BaseResource.consumeEntity(response); // We don't need the response at all.
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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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BaseResource.consumeEntity(response); // The exception thrown should not need the body of the response.
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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(null);
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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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Logger.warn(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(null);
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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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Logger.info(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) {
|
|
Log.e(LOG_TAG, "Got exception generating new keys.", e);
|
|
freshStartDelegate.onFreshStartFailed(e);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void handleMissing(MetaGlobal global, SyncStorageResponse response) {
|
|
// Shouldn't happen.
|
|
Logger.warn(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.
|
|
Logger.warn(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) {
|
|
Logger.warn(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) {
|
|
Logger.warn(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) {
|
|
Logger.warn(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) {
|
|
BaseResource.consumeEntity(response);
|
|
wipeDelegate.onWiped(response.normalizedWeaveTimestamp());
|
|
}
|
|
|
|
@Override
|
|
public void handleRequestFailure(SyncStorageResponse response) {
|
|
Logger.warn(LOG_TAG, "Got request failure " + response.getStatusCode() + " in wipeServer.");
|
|
// Process HTTP failures here to pick up backoffs, etc.
|
|
self.interpretHTTPFailure(response.httpResponse());
|
|
BaseResource.consumeEntity(response); // The exception thrown should not need the body of the response.
|
|
wipeDelegate.onWipeFailed(new HTTPFailureException(response));
|
|
}
|
|
|
|
@Override
|
|
public void handleRequestError(Exception ex) {
|
|
Logger.warn(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(String[] engines) {
|
|
if (engines == null) {
|
|
// Set `engines` to be *all* the engines.
|
|
}
|
|
// TODO: futz with config?!
|
|
// TODO: engines?!
|
|
}
|
|
|
|
/**
|
|
* Suggest that your Sync client needs to be upgraded to work
|
|
* with this server.
|
|
*/
|
|
public void requiresUpgrade() {
|
|
Logger.info(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
|
|
* true if the engine with the provided name is present in the
|
|
* meta/global "engines" object.
|
|
*
|
|
* @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;
|
|
}
|
|
|
|
public ClientsDataDelegate getClientsDelegate() {
|
|
return this.clientsDelegate;
|
|
}
|
|
|
|
/**
|
|
* The longest backoff observed to date; -1 means no backoff observed.
|
|
*/
|
|
protected final AtomicLong largestBackoffObserved = new AtomicLong(-1);
|
|
|
|
/**
|
|
* Reset any observed backoff and start observing HTTP responses for backoff
|
|
* requests.
|
|
*/
|
|
protected void installAsHttpResponseObserver() {
|
|
Logger.debug(LOG_TAG, "Installing " + this + " as BaseResource HttpResponseObserver.");
|
|
BaseResource.setHttpResponseObserver(this);
|
|
largestBackoffObserved.set(-1);
|
|
}
|
|
|
|
/**
|
|
* Stop observing HttpResponses for backoff requests.
|
|
*/
|
|
protected void uninstallAsHttpResponseObserver() {
|
|
Logger.debug(LOG_TAG, "Uninstalling " + this + " as BaseResource HttpResponseObserver.");
|
|
BaseResource.setHttpResponseObserver(null);
|
|
}
|
|
|
|
/**
|
|
* Observe all HTTP response for backoff requests on all status codes, not just errors.
|
|
*/
|
|
@Override
|
|
public void observeHttpResponse(HttpResponse response) {
|
|
long responseBackoff = (new SyncResponse(response)).totalBackoffInMilliseconds(); // TODO: don't allocate object?
|
|
if (responseBackoff <= 0) {
|
|
return;
|
|
}
|
|
|
|
Logger.debug(LOG_TAG, "Observed " + responseBackoff + " millisecond backoff request.");
|
|
while (true) {
|
|
long existingBackoff = largestBackoffObserved.get();
|
|
if (existingBackoff >= responseBackoff) {
|
|
return;
|
|
}
|
|
if (largestBackoffObserved.compareAndSet(existingBackoff, responseBackoff)) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|