forked from mirrors/gecko-dev
485 lines
16 KiB
JavaScript
485 lines
16 KiB
JavaScript
/* 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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"use strict";
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const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Promise.jsm");
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let console = (Cu.import("resource://gre/modules/devtools/Console.jsm", {})).console;
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this.EXPORTED_SYMBOLS = ["MozLoopService"];
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XPCOMUtils.defineLazyModuleGetter(this, "injectLoopAPI",
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"resource:///modules/loop/MozLoopAPI.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "Chat", "resource:///modules/Chat.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "CommonUtils",
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"resource://services-common/utils.js");
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XPCOMUtils.defineLazyModuleGetter(this, "CryptoUtils",
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"resource://services-crypto/utils.js");
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XPCOMUtils.defineLazyModuleGetter(this, "HawkClient",
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"resource://services-common/hawkclient.js");
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XPCOMUtils.defineLazyModuleGetter(this, "deriveHawkCredentials",
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"resource://services-common/hawkrequest.js");
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XPCOMUtils.defineLazyModuleGetter(this, "MozLoopPushHandler",
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"resource:///modules/loop/MozLoopPushHandler.jsm");
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/**
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* Internal helper methods and state
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*
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* The registration is a two-part process. First we need to connect to
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* and register with the push server. Then we need to take the result of that
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* and register with the Loop server.
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*/
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let MozLoopServiceInternal = {
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// The uri of the Loop server.
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loopServerUri: Services.prefs.getCharPref("loop.server"),
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// The current deferred for the registration process. This is set if in progress
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// or the registration was successful. This is null if a registration attempt was
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// unsuccessful.
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_registeredDeferred: null,
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/**
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* The initial delay for push registration. This ensures we don't start
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* kicking off straight after browser startup, just a few seconds later.
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*/
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get initialRegistrationDelayMilliseconds() {
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try {
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// Let a pref override this for developer & testing use.
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return Services.prefs.getIntPref("loop.initialDelay");
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} catch (x) {
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// Default to 5 seconds
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return 5000;
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}
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return initialDelay;
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},
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/**
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* Gets the current latest expiry time for urls.
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*
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* In seconds since epoch.
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*/
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get expiryTimeSeconds() {
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try {
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return Services.prefs.getIntPref("loop.urlsExpiryTimeSeconds");
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} catch (x) {
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// It is ok for the pref not to exist.
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return 0;
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}
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},
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/**
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* Sets the expiry time to either the specified time, or keeps it the same
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* depending on which is latest.
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*/
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set expiryTimeSeconds(time) {
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if (time > this.expiryTimeSeconds) {
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Services.prefs.setIntPref("loop.urlsExpiryTimeSeconds", time);
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}
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},
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/**
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* Returns true if the expiry time is in the future.
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*/
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urlExpiryTimeIsInFuture: function() {
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return this.expiryTimeSeconds * 1000 > Date.now();
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},
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/**
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* Retrieves MozLoopService "do not disturb" pref value.
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*
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* @return {Boolean} aFlag
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*/
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get doNotDisturb() {
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return Services.prefs.getBoolPref("loop.do_not_disturb");
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},
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/**
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* Sets MozLoopService "do not disturb" pref value.
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*
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* @param {Boolean} aFlag
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*/
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set doNotDisturb(aFlag) {
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Services.prefs.setBoolPref("loop.do_not_disturb", Boolean(aFlag));
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},
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/**
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* Starts registration of Loop with the push server, and then will register
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* with the Loop server. It will return early if already registered.
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*
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* @param {Object} mockPushHandler Optional, test-only mock push handler. Used
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* to allow mocking of the MozLoopPushHandler.
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* @returns {Promise} a promise that is resolved with no params on completion, or
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* rejected with an error code or string.
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*/
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promiseRegisteredWithServers: function(mockPushHandler) {
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if (this._registeredDeferred) {
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return this._registeredDeferred.promise;
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}
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this._registeredDeferred = Promise.defer();
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// We grab the promise early in case .initialize or its results sets
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// it back to null on error.
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let result = this._registeredDeferred.promise;
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this._pushHandler = mockPushHandler || MozLoopPushHandler;
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this._pushHandler.initialize(this.onPushRegistered.bind(this),
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this.onHandleNotification.bind(this));
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return result;
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},
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/**
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* Performs a hawk based request to the loop server.
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*
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* @param {String} path The path to make the request to.
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* @param {String} method The request method, e.g. 'POST', 'GET'.
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* @param {Object} payloadObj An object which is converted to JSON and
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* transmitted with the request.
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*/
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hawkRequest: function(path, method, payloadObj) {
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if (!this._hawkClient) {
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this._hawkClient = new HawkClient(this.loopServerUri);
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}
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let sessionToken;
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try {
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sessionToken = Services.prefs.getCharPref("loop.hawk-session-token");
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} catch (x) {
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// It is ok for this not to exist, we'll default to sending no-creds
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}
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let credentials;
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if (sessionToken) {
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credentials = deriveHawkCredentials(sessionToken, "sessionToken", 2 * 32);
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}
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return this._hawkClient.request(path, method, credentials, payloadObj);
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},
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/**
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* Used to store a session token from a request if it exists in the headers.
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*
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* @param {Object} headers The request headers, which may include a
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* "hawk-session-token" to be saved.
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* @return true on success or no token, false on failure.
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*/
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storeSessionToken: function(headers) {
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let sessionToken = headers["hawk-session-token"];
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if (sessionToken) {
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// XXX should do more validation here
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if (sessionToken.length === 64) {
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Services.prefs.setCharPref("loop.hawk-session-token", sessionToken);
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} else {
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// XXX Bubble the precise details up to the UI somehow (bug 1013248).
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console.warn("Loop server sent an invalid session token");
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this._registeredDeferred.reject("session-token-wrong-size");
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this._registeredDeferred = null;
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return false;
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}
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}
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return true;
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},
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/**
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* Callback from MozLoopPushHandler - The push server has been registered
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* and has given us a push url.
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*
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* @param {String} pushUrl The push url given by the push server.
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*/
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onPushRegistered: function(err, pushUrl) {
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if (err) {
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this._registeredDeferred.reject(err);
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this._registeredDeferred = null;
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return;
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}
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this.registerWithLoopServer(pushUrl);
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},
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/**
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* Registers with the Loop server.
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*
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* @param {String} pushUrl The push url given by the push server.
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* @param {Boolean} noRetry Optional, don't retry if authentication fails.
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*/
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registerWithLoopServer: function(pushUrl, noRetry) {
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this.hawkRequest("/registration", "POST", { simple_push_url: pushUrl})
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.then((response) => {
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// If this failed we got an invalid token. storeSessionToken rejects
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// the _registeredDeferred promise for us, so here we just need to
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// early return.
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if (!this.storeSessionToken(response.headers))
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return;
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this.registeredLoopServer = true;
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this._registeredDeferred.resolve();
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// No need to clear the promise here, everything was good, so we don't need
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// to re-register.
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}, (error) => {
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if (error.errno == 401) {
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if (this.urlExpiryTimeIsInFuture()) {
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// XXX Should this be reported to the user is a visible manner?
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Cu.reportError("Loop session token is invalid, all previously "
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+ "generated urls will no longer work.");
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}
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// Authorization failed, invalid token, we need to try again with a new token.
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Services.prefs.clearUserPref("loop.hawk-session-token");
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this.registerWithLoopServer(pushUrl, true);
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return;
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}
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// XXX Bubble the precise details up to the UI somehow (bug 1013248).
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Cu.reportError("Failed to register with the loop server. error: " + error);
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this._registeredDeferred.reject(error.errno);
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this._registeredDeferred = null;
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}
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);
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},
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/**
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* Callback from MozLoopPushHandler - A push notification has been received from
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* the server.
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*
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* @param {String} version The version information from the server.
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*/
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onHandleNotification: function(version) {
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if (this.doNotDisturb) {
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return;
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}
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this.openChatWindow(null, "LooP", "about:loopconversation#incoming/" + version);
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},
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/**
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* A getter to obtain and store the strings for loop. This is structured
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* for use by l10n.js.
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*
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* @returns {Object} a map of element ids with attributes to set.
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*/
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get localizedStrings() {
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if (this._localizedStrings)
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return this._localizedStrings;
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var stringBundle =
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Services.strings.createBundle('chrome://browser/locale/loop/loop.properties');
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var map = {};
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var enumerator = stringBundle.getSimpleEnumeration();
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while (enumerator.hasMoreElements()) {
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var string = enumerator.getNext().QueryInterface(Ci.nsIPropertyElement);
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// 'textContent' is the default attribute to set if none are specified.
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var key = string.key, property = 'textContent';
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var i = key.lastIndexOf('.');
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if (i >= 0) {
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property = key.substring(i + 1);
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key = key.substring(0, i);
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}
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if (!(key in map))
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map[key] = {};
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map[key][property] = string.value;
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}
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return this._localizedStrings = map;
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},
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/**
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* Opens the chat window
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*
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* @param {Object} contentWindow The window to open the chat window in, may
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* be null.
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* @param {String} title The title of the chat window.
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* @param {String} url The page to load in the chat window.
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* @param {String} mode May be "minimized" or undefined.
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*/
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openChatWindow: function(contentWindow, title, url, mode) {
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// So I guess the origin is the loop server!?
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let origin = this.loopServerUri;
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url = url.spec || url;
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let callback = chatbox => {
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// We need to use DOMContentLoaded as otherwise the injection will happen
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// in about:blank and then get lost.
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// Sadly we can't use chatbox.promiseChatLoaded() as promise chaining
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// involves event loop spins, which means it might be too late.
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// Have we already done it?
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if (chatbox.contentWindow.navigator.mozLoop) {
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return;
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}
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chatbox.addEventListener("DOMContentLoaded", function loaded(event) {
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if (event.target != chatbox.contentDocument) {
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return;
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}
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chatbox.removeEventListener("DOMContentLoaded", loaded, true);
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injectLoopAPI(chatbox.contentWindow);
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}, true);
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};
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Chat.open(contentWindow, origin, title, url, undefined, undefined, callback);
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}
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};
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/**
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* Public API
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*/
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this.MozLoopService = {
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/**
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* Initialized the loop service, and starts registration with the
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* push and loop servers.
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*/
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initialize: function() {
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// If expiresTime is in the future then kick-off registration.
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if (MozLoopServiceInternal.urlExpiryTimeIsInFuture()) {
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this._startInitializeTimer();
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}
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},
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/**
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* Internal function, exposed for testing purposes only. Used to start the
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* initialize timer.
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*/
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_startInitializeTimer: function() {
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// Kick off the push notification service into registering after a timeout
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// this ensures we're not doing too much straight after the browser's finished
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// starting up.
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this._initializeTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
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this._initializeTimer.initWithCallback(function() {
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this.register();
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this._initializeTimer = null;
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}.bind(this),
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MozLoopServiceInternal.initialRegistrationDelayMilliseconds, Ci.nsITimer.TYPE_ONE_SHOT);
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},
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/**
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* Starts registration of Loop with the push server, and then will register
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* with the Loop server. It will return early if already registered.
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*
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* @param {Object} mockPushHandler Optional, test-only mock push handler. Used
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* to allow mocking of the MozLoopPushHandler.
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* @returns {Promise} a promise that is resolved with no params on completion, or
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* rejected with an error code or string.
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*/
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register: function(mockPushHandler) {
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return MozLoopServiceInternal.promiseRegisteredWithServers(mockPushHandler);
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},
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/**
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* Used to note a call url expiry time. If the time is later than the current
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* latest expiry time, then the stored expiry time is increased. For times
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* sooner, this function is a no-op; this ensures we always have the latest
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* expiry time for a url.
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*
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* This is used to deterimine whether or not we should be registering with the
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* push server on start.
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*
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* @param {Integer} expiryTimeSeconds The seconds since epoch of the expiry time
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* of the url.
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*/
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noteCallUrlExpiry: function(expiryTimeSeconds) {
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MozLoopServiceInternal.expiryTimeSeconds = expiryTimeSeconds;
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},
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/**
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* Returns the strings for the specified element. Designed for use
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* with l10n.js.
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*
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* @param {key} The element id to get strings for.
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* @return {String} A JSON string containing the localized
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* attribute/value pairs for the element.
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*/
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getStrings: function(key) {
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var stringData = MozLoopServiceInternal.localizedStrings;
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if (!(key in stringData)) {
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Cu.reportError('No string for key: ' + key + 'found');
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return "";
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}
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return JSON.stringify(stringData[key]);
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},
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/**
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* Retrieves MozLoopService "do not disturb" value.
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*
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* @return {Boolean}
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*/
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get doNotDisturb() {
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return MozLoopServiceInternal.doNotDisturb;
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},
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/**
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* Sets MozLoopService "do not disturb" value.
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*
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* @param {Boolean} aFlag
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*/
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set doNotDisturb(aFlag) {
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MozLoopServiceInternal.doNotDisturb = aFlag;
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},
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/**
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* Returns the current locale
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*
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* @return {String} The code of the current locale.
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*/
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get locale() {
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try {
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return Services.prefs.getComplexValue("general.useragent.locale",
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Ci.nsISupportsString).data;
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} catch (ex) {
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return "en-US";
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}
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},
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/**
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* Set any character preference under "loop.".
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*
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* @param {String} prefName The name of the pref without the preceding "loop."
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* @param {String} value The value to set.
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*
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* Any errors thrown by the Mozilla pref API are logged to the console.
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*/
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setLoopCharPref: function(prefName, value) {
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try {
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Services.prefs.setCharPref("loop." + prefName, value);
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} catch (ex) {
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console.log("setLoopCharPref had trouble setting " + prefName +
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"; exception: " + ex);
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}
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},
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/**
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* Return any preference under "loop." that's coercible to a character
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* preference.
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*
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* @param {String} prefName The name of the pref without the preceding
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* "loop."
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*
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* Any errors thrown by the Mozilla pref API are logged to the console
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* and cause null to be returned. This includes the case of the preference
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* not being found.
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*
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* @return {String} on success, null on error
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*/
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getLoopCharPref: function(prefName) {
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try {
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return Services.prefs.getCharPref("loop." + prefName);
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} catch (ex) {
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console.log("getLoopCharPref had trouble getting " + prefName +
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"; exception: " + ex);
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return null;
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}
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}
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};
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