зеркало из https://github.com/mozilla/gecko-dev.git
1160 строки
34 KiB
JavaScript
1160 строки
34 KiB
JavaScript
/* jshint moz: true, esnext: true */
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/* 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 {Preferences} = ChromeUtils.import("resource://gre/modules/Preferences.jsm");
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const {Services} = ChromeUtils.import("resource://gre/modules/Services.jsm");
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const {XPCOMUtils} = ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
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const {PushDB} = ChromeUtils.import("resource://gre/modules/PushDB.jsm");
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const {PushRecord} = ChromeUtils.import("resource://gre/modules/PushRecord.jsm");
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const {PushCrypto} = ChromeUtils.import("resource://gre/modules/PushCrypto.jsm");
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const kPUSHWSDB_DB_NAME = "pushapi";
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const kPUSHWSDB_DB_VERSION = 5; // Change this if the IndexedDB format changes
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const kPUSHWSDB_STORE_NAME = "pushapi";
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// WebSocket close code sent by the server to indicate that the client should
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// not automatically reconnect.
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const kBACKOFF_WS_STATUS_CODE = 4774;
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// Maps ack statuses, unsubscribe reasons, and delivery error reasons to codes
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// included in request payloads.
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const kACK_STATUS_TO_CODE = {
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[Ci.nsIPushErrorReporter.ACK_DELIVERED]: 100,
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[Ci.nsIPushErrorReporter.ACK_DECRYPTION_ERROR]: 101,
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[Ci.nsIPushErrorReporter.ACK_NOT_DELIVERED]: 102,
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};
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const kUNREGISTER_REASON_TO_CODE = {
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[Ci.nsIPushErrorReporter.UNSUBSCRIBE_MANUAL]: 200,
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[Ci.nsIPushErrorReporter.UNSUBSCRIBE_QUOTA_EXCEEDED]: 201,
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[Ci.nsIPushErrorReporter.UNSUBSCRIBE_PERMISSION_REVOKED]: 202,
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};
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const kDELIVERY_REASON_TO_CODE = {
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[Ci.nsIPushErrorReporter.DELIVERY_UNCAUGHT_EXCEPTION]: 301,
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[Ci.nsIPushErrorReporter.DELIVERY_UNHANDLED_REJECTION]: 302,
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[Ci.nsIPushErrorReporter.DELIVERY_INTERNAL_ERROR]: 303,
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};
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const prefs = new Preferences("dom.push.");
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var EXPORTED_SYMBOLS = ["PushServiceWebSocket"];
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XPCOMUtils.defineLazyGetter(this, "console", () => {
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let {ConsoleAPI} = ChromeUtils.import("resource://gre/modules/Console.jsm");
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return new ConsoleAPI({
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maxLogLevelPref: "dom.push.loglevel",
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prefix: "PushServiceWebSocket",
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});
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});
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/**
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* A proxy between the PushService and the WebSocket. The listener is used so
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* that the PushService can silence messages from the WebSocket by setting
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* PushWebSocketListener._pushService to null. This is required because
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* a WebSocket can continue to send messages or errors after it has been
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* closed but the PushService may not be interested in these. It's easier to
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* stop listening than to have checks at specific points.
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*/
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var PushWebSocketListener = function(pushService) {
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this._pushService = pushService;
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};
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PushWebSocketListener.prototype = {
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onStart: function(context) {
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if (!this._pushService) {
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return;
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}
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this._pushService._wsOnStart(context);
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},
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onStop: function(context, statusCode) {
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if (!this._pushService) {
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return;
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}
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this._pushService._wsOnStop(context, statusCode);
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},
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onAcknowledge: function(context, size) {
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// EMPTY
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},
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onBinaryMessageAvailable: function(context, message) {
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// EMPTY
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},
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onMessageAvailable: function(context, message) {
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if (!this._pushService) {
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return;
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}
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this._pushService._wsOnMessageAvailable(context, message);
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},
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onServerClose: function(context, aStatusCode, aReason) {
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if (!this._pushService) {
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return;
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}
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this._pushService._wsOnServerClose(context, aStatusCode, aReason);
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}
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};
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// websocket states
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// websocket is off
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const STATE_SHUT_DOWN = 0;
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// Websocket has been opened on client side, waiting for successful open.
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// (_wsOnStart)
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const STATE_WAITING_FOR_WS_START = 1;
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// Websocket opened, hello sent, waiting for server reply (_handleHelloReply).
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const STATE_WAITING_FOR_HELLO = 2;
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// Websocket operational, handshake completed, begin protocol messaging.
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const STATE_READY = 3;
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var PushServiceWebSocket = {
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_mainPushService: null,
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_serverURI: null,
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newPushDB: function() {
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return new PushDB(kPUSHWSDB_DB_NAME,
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kPUSHWSDB_DB_VERSION,
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kPUSHWSDB_STORE_NAME,
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"channelID",
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PushRecordWebSocket);
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},
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disconnect: function() {
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this._shutdownWS();
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},
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observe: function(aSubject, aTopic, aData) {
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if (aTopic == "nsPref:changed" && aData == "dom.push.userAgentID") {
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this._onUAIDChanged();
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} else if (aTopic == "timer-callback") {
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this._onTimerFired(aSubject);
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}
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},
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/**
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* Handles a UAID change. Unlike reconnects, we cancel all pending requests
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* after disconnecting. Existing subscriptions stored in IndexedDB will be
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* dropped on reconnect.
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*/
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_onUAIDChanged() {
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console.debug("onUAIDChanged()");
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this._shutdownWS();
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this._startBackoffTimer();
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},
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/** Handles a ping, backoff, or request timeout timer event. */
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_onTimerFired(timer) {
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console.debug("onTimerFired()");
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if (timer == this._pingTimer) {
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this._sendPing();
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return;
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}
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if (timer == this._backoffTimer) {
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console.debug("onTimerFired: Reconnecting after backoff");
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this._beginWSSetup();
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return;
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}
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if (timer == this._requestTimeoutTimer) {
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this._timeOutRequests();
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return;
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}
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},
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/**
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* Sends a ping to the server. Bypasses the request queue, but starts the
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* request timeout timer. If the socket is already closed, or the server
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* does not respond within the timeout, the client will reconnect.
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*/
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_sendPing() {
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console.debug("sendPing()");
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this._startRequestTimeoutTimer();
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try {
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this._wsSendMessage({});
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this._lastPingTime = Date.now();
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} catch (e) {
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console.debug("sendPing: Error sending ping", e);
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this._reconnect();
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}
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},
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/** Times out any pending requests. */
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_timeOutRequests() {
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console.debug("timeOutRequests()");
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if (!this._hasPendingRequests()) {
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// Cancel the repeating timer and exit early if we aren't waiting for
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// pongs or requests.
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this._requestTimeoutTimer.cancel();
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return;
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}
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let now = Date.now();
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// Set to true if at least one request timed out, or we're still waiting
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// for a pong after the request timeout.
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let requestTimedOut = false;
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if (this._lastPingTime > 0 &&
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now - this._lastPingTime > this._requestTimeout) {
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console.debug("timeOutRequests: Did not receive pong in time");
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requestTimedOut = true;
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} else {
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for (let [key, request] of this._pendingRequests) {
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let duration = now - request.ctime;
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// If any of the registration requests time out, all the ones after it
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// also made to fail, since we are going to be disconnecting the
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// socket.
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requestTimedOut |= duration > this._requestTimeout;
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if (requestTimedOut) {
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request.reject(new Error("Request timed out: " + key));
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this._pendingRequests.delete(key);
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}
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}
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}
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// The most likely reason for a pong or registration request timing out is
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// that the socket has disconnected. Best to reconnect.
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if (requestTimedOut) {
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this._reconnect();
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}
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},
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validServerURI: function(serverURI) {
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if (serverURI.scheme == "ws") {
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return !!prefs.get("testing.allowInsecureServerURL");
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}
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return serverURI.scheme == "wss";
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},
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get _UAID() {
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return prefs.get("userAgentID");
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},
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set _UAID(newID) {
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if (typeof(newID) !== "string") {
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console.warn("Got invalid, non-string UAID", newID,
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"Not updating userAgentID");
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return;
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}
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console.debug("New _UAID", newID);
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prefs.set("userAgentID", newID);
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},
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_ws: null,
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_pendingRequests: new Map(),
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_currentState: STATE_SHUT_DOWN,
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_requestTimeout: 0,
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_requestTimeoutTimer: null,
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_retryFailCount: 0,
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/**
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* According to the WS spec, servers should immediately close the underlying
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* TCP connection after they close a WebSocket. This causes wsOnStop to be
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* called with error NS_BASE_STREAM_CLOSED. Since the client has to keep the
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* WebSocket up, it should try to reconnect. But if the server closes the
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* WebSocket because it wants the client to back off, then the client
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* shouldn't re-establish the connection. If the server sends the backoff
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* close code, this field will be set to true in wsOnServerClose. It is
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* checked in wsOnStop.
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*/
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_skipReconnect: false,
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/** Indicates whether the server supports Web Push-style message delivery. */
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_dataEnabled: false,
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/**
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* The last time the client sent a ping to the server. If non-zero, keeps the
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* request timeout timer active. Reset to zero when the server responds with
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* a pong or pending messages.
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*/
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_lastPingTime: 0,
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/**
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* A one-shot timer used to ping the server, to avoid timing out idle
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* connections. Reset to the ping interval on each incoming message.
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*/
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_pingTimer: null,
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/** A one-shot timer fired after the reconnect backoff period. */
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_backoffTimer: null,
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/**
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* Sends a message to the Push Server through an open websocket.
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* typeof(msg) shall be an object
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*/
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_wsSendMessage: function(msg) {
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if (!this._ws) {
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console.warn("wsSendMessage: No WebSocket initialized.",
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"Cannot send a message");
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return;
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}
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msg = JSON.stringify(msg);
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console.debug("wsSendMessage: Sending message", msg);
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this._ws.sendMsg(msg);
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},
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init: function(options, mainPushService, serverURI) {
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console.debug("init()");
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this._mainPushService = mainPushService;
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this._serverURI = serverURI;
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// Filled in at connect() time
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this._broadcastListeners = null;
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// Override the default WebSocket factory function. The returned object
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// must be null or satisfy the nsIWebSocketChannel interface. Used by
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// the tests to provide a mock WebSocket implementation.
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if (options.makeWebSocket) {
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this._makeWebSocket = options.makeWebSocket;
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}
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this._requestTimeout = prefs.get("requestTimeout");
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return Promise.resolve();
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},
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_reconnect: function () {
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console.debug("reconnect()");
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this._shutdownWS(false);
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this._startBackoffTimer();
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},
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_shutdownWS: function(shouldCancelPending = true) {
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console.debug("shutdownWS()");
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if (this._currentState == STATE_READY) {
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prefs.ignore("userAgentID", this);
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}
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this._currentState = STATE_SHUT_DOWN;
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this._skipReconnect = false;
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if (this._wsListener) {
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this._wsListener._pushService = null;
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}
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try {
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this._ws.close(0, null);
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} catch (e) {}
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this._ws = null;
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this._lastPingTime = 0;
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if (this._pingTimer) {
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this._pingTimer.cancel();
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}
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if (shouldCancelPending) {
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this._cancelPendingRequests();
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}
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if (this._notifyRequestQueue) {
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this._notifyRequestQueue();
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this._notifyRequestQueue = null;
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}
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},
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uninit: function() {
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// All pending requests (ideally none) are dropped at this point. We
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// shouldn't have any applications performing registration/unregistration
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// or receiving notifications.
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this._shutdownWS();
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if (this._backoffTimer) {
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this._backoffTimer.cancel();
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}
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if (this._requestTimeoutTimer) {
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this._requestTimeoutTimer.cancel();
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}
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this._mainPushService = null;
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this._dataEnabled = false;
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},
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/**
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* How retries work: If the WS is closed due to a socket error,
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* _startBackoffTimer() is called. The retry timer is started and when
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* it times out, beginWSSetup() is called again.
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*
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* If we are in the middle of a timeout (i.e. waiting), but
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* a register/unregister is called, we don't want to wait around anymore.
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* _sendRequest will automatically call beginWSSetup(), which will cancel the
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* timer. In addition since the state will have changed, even if a pending
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* timer event comes in (because the timer fired the event before it was
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* cancelled), so the connection won't be reset.
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*/
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_startBackoffTimer() {
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console.debug("startBackoffTimer()");
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// Calculate new timeout, but cap it to pingInterval.
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let retryTimeout = prefs.get("retryBaseInterval") *
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Math.pow(2, this._retryFailCount);
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retryTimeout = Math.min(retryTimeout, prefs.get("pingInterval"));
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this._retryFailCount++;
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console.debug("startBackoffTimer: Retry in", retryTimeout,
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"Try number", this._retryFailCount);
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if (!this._backoffTimer) {
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this._backoffTimer = Cc["@mozilla.org/timer;1"]
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.createInstance(Ci.nsITimer);
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}
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this._backoffTimer.init(this, retryTimeout, Ci.nsITimer.TYPE_ONE_SHOT);
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},
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/** Indicates whether we're waiting for pongs or requests. */
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_hasPendingRequests() {
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return this._lastPingTime > 0 || this._pendingRequests.size > 0;
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},
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/**
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* Starts the request timeout timer unless we're already waiting for a pong
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* or register request.
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*/
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_startRequestTimeoutTimer() {
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if (this._hasPendingRequests()) {
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return;
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}
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if (!this._requestTimeoutTimer) {
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this._requestTimeoutTimer = Cc["@mozilla.org/timer;1"]
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.createInstance(Ci.nsITimer);
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}
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this._requestTimeoutTimer.init(this,
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this._requestTimeout,
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Ci.nsITimer.TYPE_REPEATING_SLACK);
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},
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/** Starts or resets the ping timer. */
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_startPingTimer() {
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if (!this._pingTimer) {
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this._pingTimer = Cc["@mozilla.org/timer;1"]
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.createInstance(Ci.nsITimer);
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}
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this._pingTimer.init(this, prefs.get("pingInterval"),
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Ci.nsITimer.TYPE_ONE_SHOT);
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},
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_makeWebSocket: function(uri) {
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if (!prefs.get("connection.enabled")) {
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console.warn("makeWebSocket: connection.enabled is not set to true.",
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"Aborting.");
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return null;
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}
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if (Services.io.offline) {
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console.warn("makeWebSocket: Network is offline.");
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return null;
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}
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let contractId = uri.scheme == "ws" ?
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"@mozilla.org/network/protocol;1?name=ws" :
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"@mozilla.org/network/protocol;1?name=wss";
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let socket = Cc[contractId].createInstance(Ci.nsIWebSocketChannel);
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socket.initLoadInfo(null, // aLoadingNode
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Services.scriptSecurityManager.getSystemPrincipal(),
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null, // aTriggeringPrincipal
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Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
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Ci.nsIContentPolicy.TYPE_WEBSOCKET);
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return socket;
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},
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_beginWSSetup: function() {
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console.debug("beginWSSetup()");
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if (this._currentState != STATE_SHUT_DOWN) {
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console.error("_beginWSSetup: Not in shutdown state! Current state",
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this._currentState);
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return;
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}
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// Stop any pending reconnects scheduled for the near future.
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if (this._backoffTimer) {
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this._backoffTimer.cancel();
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}
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let uri = this._serverURI;
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if (!uri) {
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return;
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}
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let socket = this._makeWebSocket(uri);
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if (!socket) {
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return;
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}
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this._ws = socket.QueryInterface(Ci.nsIWebSocketChannel);
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console.debug("beginWSSetup: Connecting to", uri.spec);
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this._wsListener = new PushWebSocketListener(this);
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this._ws.protocol = "push-notification";
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try {
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// Grab a wakelock before we open the socket to ensure we don't go to
|
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// sleep before connection the is opened.
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this._ws.asyncOpen(uri, uri.spec, 0, this._wsListener, null);
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this._currentState = STATE_WAITING_FOR_WS_START;
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} catch(e) {
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console.error("beginWSSetup: Error opening websocket.",
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"asyncOpen failed", e);
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this._reconnect();
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}
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},
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connect: function(broadcastListeners) {
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console.debug("connect()", broadcastListeners);
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this._broadcastListeners = broadcastListeners;
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this._beginWSSetup();
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},
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isConnected: function() {
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return !!this._ws;
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},
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/**
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* Protocol handler invoked by server message.
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*/
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_handleHelloReply: function(reply) {
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console.debug("handleHelloReply()");
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if (this._currentState != STATE_WAITING_FOR_HELLO) {
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console.error("handleHelloReply: Unexpected state", this._currentState,
|
|
"(expected STATE_WAITING_FOR_HELLO)");
|
|
this._shutdownWS();
|
|
return;
|
|
}
|
|
|
|
if (typeof reply.uaid !== "string") {
|
|
console.error("handleHelloReply: Received invalid UAID", reply.uaid);
|
|
this._shutdownWS();
|
|
return;
|
|
}
|
|
|
|
if (reply.uaid === "") {
|
|
console.error("handleHelloReply: Received empty UAID");
|
|
this._shutdownWS();
|
|
return;
|
|
}
|
|
|
|
// To avoid sticking extra large values sent by an evil server into prefs.
|
|
if (reply.uaid.length > 128) {
|
|
console.error("handleHelloReply: UAID received from server was too long",
|
|
reply.uaid);
|
|
this._shutdownWS();
|
|
return;
|
|
}
|
|
|
|
let sendRequests = () => {
|
|
if (this._notifyRequestQueue) {
|
|
this._notifyRequestQueue();
|
|
this._notifyRequestQueue = null;
|
|
}
|
|
this._sendPendingRequests();
|
|
};
|
|
|
|
function finishHandshake() {
|
|
this._UAID = reply.uaid;
|
|
this._currentState = STATE_READY;
|
|
prefs.observe("userAgentID", this);
|
|
|
|
// Handle broadcasts received in response to the "hello" message.
|
|
if (reply.broadcasts) {
|
|
// The reply isn't technically a broadcast message, but it has
|
|
// the shape of a broadcast message (it has a broadcasts field).
|
|
this._mainPushService.receivedBroadcastMessage(reply);
|
|
}
|
|
|
|
this._dataEnabled = !!reply.use_webpush;
|
|
if (this._dataEnabled) {
|
|
this._mainPushService.getAllUnexpired().then(records =>
|
|
Promise.all(records.map(record =>
|
|
this._mainPushService.ensureCrypto(record).catch(error => {
|
|
console.error("finishHandshake: Error updating record",
|
|
record.keyID, error);
|
|
})
|
|
))
|
|
).then(sendRequests);
|
|
} else {
|
|
sendRequests();
|
|
}
|
|
}
|
|
|
|
// By this point we've got a UAID from the server that we are ready to
|
|
// accept.
|
|
//
|
|
// We unconditionally drop all existing registrations and notify service
|
|
// workers if we receive a new UAID. This ensures we expunge all stale
|
|
// registrations if the `userAgentID` pref is reset.
|
|
if (this._UAID != reply.uaid) {
|
|
console.debug("handleHelloReply: Received new UAID");
|
|
|
|
this._mainPushService.dropUnexpiredRegistrations()
|
|
.then(finishHandshake.bind(this));
|
|
|
|
return;
|
|
}
|
|
|
|
// otherwise we are good to go
|
|
finishHandshake.bind(this)();
|
|
},
|
|
|
|
/**
|
|
* Protocol handler invoked by server message.
|
|
*/
|
|
_handleRegisterReply: function(reply) {
|
|
console.debug("handleRegisterReply()");
|
|
|
|
let tmp = this._takeRequestForReply(reply);
|
|
if (!tmp) {
|
|
return;
|
|
}
|
|
|
|
if (reply.status == 200) {
|
|
try {
|
|
Services.io.newURI(reply.pushEndpoint);
|
|
}
|
|
catch (e) {
|
|
tmp.reject(new Error("Invalid push endpoint: " + reply.pushEndpoint));
|
|
return;
|
|
}
|
|
|
|
let record = new PushRecordWebSocket({
|
|
channelID: reply.channelID,
|
|
pushEndpoint: reply.pushEndpoint,
|
|
scope: tmp.record.scope,
|
|
originAttributes: tmp.record.originAttributes,
|
|
version: null,
|
|
systemRecord: tmp.record.systemRecord,
|
|
appServerKey: tmp.record.appServerKey,
|
|
ctime: Date.now(),
|
|
});
|
|
tmp.resolve(record);
|
|
} else {
|
|
console.error("handleRegisterReply: Unexpected server response", reply);
|
|
tmp.reject(new Error("Wrong status code for register reply: " +
|
|
reply.status));
|
|
}
|
|
},
|
|
|
|
_handleUnregisterReply(reply) {
|
|
console.debug("handleUnregisterReply()");
|
|
|
|
let request = this._takeRequestForReply(reply);
|
|
if (!request) {
|
|
return;
|
|
}
|
|
|
|
let success = reply.status === 200;
|
|
request.resolve(success);
|
|
},
|
|
|
|
_handleDataUpdate: function(update) {
|
|
let promise;
|
|
if (typeof update.channelID != "string") {
|
|
console.warn("handleDataUpdate: Discarding update without channel ID",
|
|
update);
|
|
return;
|
|
}
|
|
function updateRecord(record) {
|
|
// Ignore messages that we've already processed. This can happen if the
|
|
// connection drops between notifying the service worker and acking the
|
|
// the message. In that case, the server will re-send the message on
|
|
// reconnect.
|
|
if (record.hasRecentMessageID(update.version)) {
|
|
console.warn("handleDataUpdate: Ignoring duplicate message",
|
|
update.version);
|
|
return null;
|
|
}
|
|
record.noteRecentMessageID(update.version);
|
|
return record;
|
|
}
|
|
if (typeof update.data != "string") {
|
|
promise = this._mainPushService.receivedPushMessage(
|
|
update.channelID,
|
|
update.version,
|
|
null,
|
|
null,
|
|
updateRecord
|
|
);
|
|
} else {
|
|
let message = ChromeUtils.base64URLDecode(update.data, {
|
|
// The Push server may append padding.
|
|
padding: "ignore",
|
|
});
|
|
promise = this._mainPushService.receivedPushMessage(
|
|
update.channelID,
|
|
update.version,
|
|
update.headers,
|
|
message,
|
|
updateRecord
|
|
);
|
|
}
|
|
promise.then(status => {
|
|
this._sendAck(update.channelID, update.version, status);
|
|
}, err => {
|
|
console.error("handleDataUpdate: Error delivering message", update, err);
|
|
this._sendAck(update.channelID, update.version,
|
|
Ci.nsIPushErrorReporter.ACK_DECRYPTION_ERROR);
|
|
}).catch(err => {
|
|
console.error("handleDataUpdate: Error acknowledging message", update,
|
|
err);
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Protocol handler invoked by server message.
|
|
*/
|
|
_handleNotificationReply: function(reply) {
|
|
console.debug("handleNotificationReply()");
|
|
if (this._dataEnabled) {
|
|
this._handleDataUpdate(reply);
|
|
return;
|
|
}
|
|
|
|
if (typeof reply.updates !== 'object') {
|
|
console.warn("handleNotificationReply: Missing updates", reply.updates);
|
|
return;
|
|
}
|
|
|
|
console.debug("handleNotificationReply: Got updates", reply.updates);
|
|
for (let i = 0; i < reply.updates.length; i++) {
|
|
let update = reply.updates[i];
|
|
console.debug("handleNotificationReply: Handling update", update);
|
|
if (typeof update.channelID !== "string") {
|
|
console.debug("handleNotificationReply: Invalid update at index",
|
|
i, update);
|
|
continue;
|
|
}
|
|
|
|
if (update.version === undefined) {
|
|
console.debug("handleNotificationReply: Missing version", update);
|
|
continue;
|
|
}
|
|
|
|
let version = update.version;
|
|
|
|
if (typeof version === "string") {
|
|
version = parseInt(version, 10);
|
|
}
|
|
|
|
if (typeof version === "number" && version >= 0) {
|
|
// FIXME(nsm): this relies on app update notification being infallible!
|
|
// eventually fix this
|
|
this._receivedUpdate(update.channelID, version);
|
|
}
|
|
}
|
|
},
|
|
|
|
_handleBroadcastReply: function(reply) {
|
|
this._mainPushService.receivedBroadcastMessage(reply);
|
|
},
|
|
|
|
reportDeliveryError(messageID, reason) {
|
|
console.debug("reportDeliveryError()");
|
|
let code = kDELIVERY_REASON_TO_CODE[reason];
|
|
if (!code) {
|
|
throw new Error('Invalid delivery error reason');
|
|
}
|
|
let data = {messageType: 'nack',
|
|
version: messageID,
|
|
code: code};
|
|
this._queueRequest(data);
|
|
},
|
|
|
|
_sendAck(channelID, version, status) {
|
|
console.debug("sendAck()");
|
|
let code = kACK_STATUS_TO_CODE[status];
|
|
if (!code) {
|
|
throw new Error('Invalid ack status');
|
|
}
|
|
let data = {messageType: 'ack',
|
|
updates: [{channelID: channelID,
|
|
version: version,
|
|
code: code}]};
|
|
this._queueRequest(data);
|
|
},
|
|
|
|
_generateID: function() {
|
|
let uuidGenerator = Cc["@mozilla.org/uuid-generator;1"]
|
|
.getService(Ci.nsIUUIDGenerator);
|
|
// generateUUID() gives a UUID surrounded by {...}, slice them off.
|
|
return uuidGenerator.generateUUID().toString().slice(1, -1);
|
|
},
|
|
|
|
register(record) {
|
|
console.debug("register() ", record);
|
|
|
|
let data = {channelID: this._generateID(),
|
|
messageType: "register"};
|
|
|
|
if (record.appServerKey) {
|
|
data.key = ChromeUtils.base64URLEncode(record.appServerKey, {
|
|
// The Push server requires padding.
|
|
pad: true,
|
|
});
|
|
}
|
|
|
|
return this._sendRequestForReply(record, data).then(record => {
|
|
if (!this._dataEnabled) {
|
|
return record;
|
|
}
|
|
return PushCrypto.generateKeys()
|
|
.then(([publicKey, privateKey]) => {
|
|
record.p256dhPublicKey = publicKey;
|
|
record.p256dhPrivateKey = privateKey;
|
|
record.authenticationSecret = PushCrypto.generateAuthenticationSecret();
|
|
return record;
|
|
});
|
|
});
|
|
},
|
|
|
|
unregister(record, reason) {
|
|
console.debug("unregister() ", record, reason);
|
|
|
|
return Promise.resolve().then(_ => {
|
|
let code = kUNREGISTER_REASON_TO_CODE[reason];
|
|
if (!code) {
|
|
throw new Error('Invalid unregister reason');
|
|
}
|
|
let data = {channelID: record.channelID,
|
|
messageType: "unregister",
|
|
code: code};
|
|
|
|
return this._sendRequestForReply(record, data);
|
|
});
|
|
},
|
|
|
|
_queueStart: Promise.resolve(),
|
|
_notifyRequestQueue: null,
|
|
_queue: null,
|
|
_enqueue: function(op) {
|
|
console.debug("enqueue()");
|
|
if (!this._queue) {
|
|
this._queue = this._queueStart;
|
|
}
|
|
this._queue = this._queue
|
|
.then(op)
|
|
.catch(_ => {});
|
|
},
|
|
|
|
/** Sends a request to the server. */
|
|
_send(data) {
|
|
if (this._currentState != STATE_READY) {
|
|
console.warn("send: Unexpected state; ignoring message",
|
|
this._currentState);
|
|
return;
|
|
}
|
|
if (!this._requestHasReply(data)) {
|
|
this._wsSendMessage(data);
|
|
return;
|
|
}
|
|
// If we're expecting a reply, check that we haven't cancelled the request.
|
|
let key = this._makePendingRequestKey(data);
|
|
if (!this._pendingRequests.has(key)) {
|
|
console.log("send: Request cancelled; ignoring message", key);
|
|
return;
|
|
}
|
|
this._wsSendMessage(data);
|
|
},
|
|
|
|
/** Indicates whether a request has a corresponding reply from the server. */
|
|
_requestHasReply(data) {
|
|
return data.messageType == "register" || data.messageType == "unregister";
|
|
},
|
|
|
|
/**
|
|
* Sends all pending requests that expect replies. Called after the connection
|
|
* is established and the handshake is complete.
|
|
*/
|
|
_sendPendingRequests() {
|
|
this._enqueue(_ => {
|
|
for (let request of this._pendingRequests.values()) {
|
|
this._send(request.data);
|
|
}
|
|
});
|
|
},
|
|
|
|
/** Queues an outgoing request, establishing a connection if necessary. */
|
|
_queueRequest(data) {
|
|
console.debug("queueRequest()", data);
|
|
|
|
if (this._currentState == STATE_READY) {
|
|
// If we're ready, no need to queue; just send the request.
|
|
this._send(data);
|
|
return;
|
|
}
|
|
|
|
// Otherwise, we're still setting up. If we don't have a request queue,
|
|
// make one now.
|
|
if (!this._notifyRequestQueue) {
|
|
let promise = new Promise((resolve, reject) => {
|
|
this._notifyRequestQueue = resolve;
|
|
});
|
|
this._enqueue(_ => promise);
|
|
}
|
|
|
|
let isRequest = this._requestHasReply(data);
|
|
if (!isRequest) {
|
|
// Don't queue requests, since they're stored in `_pendingRequests`, and
|
|
// `_sendPendingRequests` will send them after reconnecting. Without this
|
|
// check, we'd send requests twice.
|
|
this._enqueue(_ => this._send(data));
|
|
}
|
|
|
|
if (!this._ws) {
|
|
// This will end up calling notifyRequestQueue().
|
|
this._beginWSSetup();
|
|
// If beginWSSetup does not succeed to make ws, notifyRequestQueue will
|
|
// not be call.
|
|
if (!this._ws && this._notifyRequestQueue) {
|
|
this._notifyRequestQueue();
|
|
this._notifyRequestQueue = null;
|
|
}
|
|
}
|
|
},
|
|
|
|
_receivedUpdate: function(aChannelID, aLatestVersion) {
|
|
console.debug("receivedUpdate: Updating", aChannelID, "->", aLatestVersion);
|
|
|
|
this._mainPushService.receivedPushMessage(aChannelID, "", null, null, record => {
|
|
if (record.version === null ||
|
|
record.version < aLatestVersion) {
|
|
console.debug("receivedUpdate: Version changed for", aChannelID,
|
|
aLatestVersion);
|
|
record.version = aLatestVersion;
|
|
return record;
|
|
}
|
|
console.debug("receivedUpdate: No significant version change for",
|
|
aChannelID, aLatestVersion);
|
|
return null;
|
|
}).then(status => {
|
|
this._sendAck(aChannelID, aLatestVersion, status);
|
|
}).catch(err => {
|
|
console.error("receivedUpdate: Error acknowledging message", aChannelID,
|
|
aLatestVersion, err);
|
|
});
|
|
},
|
|
|
|
// begin Push protocol handshake
|
|
_wsOnStart: function(context) {
|
|
console.debug("wsOnStart()");
|
|
|
|
if (this._currentState != STATE_WAITING_FOR_WS_START) {
|
|
console.error("wsOnStart: NOT in STATE_WAITING_FOR_WS_START. Current",
|
|
"state", this._currentState, "Skipping");
|
|
return;
|
|
}
|
|
|
|
let data = {
|
|
messageType: "hello",
|
|
broadcasts: this._broadcastListeners,
|
|
use_webpush: true,
|
|
};
|
|
|
|
if (this._UAID) {
|
|
data.uaid = this._UAID;
|
|
}
|
|
|
|
this._wsSendMessage(data);
|
|
this._currentState = STATE_WAITING_FOR_HELLO;
|
|
},
|
|
|
|
/**
|
|
* This statusCode is not the websocket protocol status code, but the TCP
|
|
* connection close status code.
|
|
*
|
|
* If we do not explicitly call ws.close() then statusCode is always
|
|
* NS_BASE_STREAM_CLOSED, even on a successful close.
|
|
*/
|
|
_wsOnStop: function(context, statusCode) {
|
|
console.debug("wsOnStop()");
|
|
|
|
if (statusCode != Cr.NS_OK && !this._skipReconnect) {
|
|
console.debug("wsOnStop: Reconnecting after socket error", statusCode);
|
|
this._reconnect();
|
|
return;
|
|
}
|
|
|
|
this._shutdownWS();
|
|
},
|
|
|
|
_wsOnMessageAvailable: function(context, message) {
|
|
console.debug("wsOnMessageAvailable()", message);
|
|
|
|
// Clearing the last ping time indicates we're no longer waiting for a pong.
|
|
this._lastPingTime = 0;
|
|
|
|
let reply;
|
|
try {
|
|
reply = JSON.parse(message);
|
|
} catch(e) {
|
|
console.warn("wsOnMessageAvailable: Invalid JSON", message, e);
|
|
return;
|
|
}
|
|
|
|
// If we receive a message, we know the connection succeeded. Reset the
|
|
// connection attempt and ping interval counters.
|
|
this._retryFailCount = 0;
|
|
|
|
let doNotHandle = false;
|
|
if ((message === '{}') ||
|
|
(reply.messageType === undefined) ||
|
|
(reply.messageType === "ping") ||
|
|
(typeof reply.messageType != "string")) {
|
|
console.debug("wsOnMessageAvailable: Pong received");
|
|
doNotHandle = true;
|
|
}
|
|
|
|
// Reset the ping timer. Note: This path is executed at every step of the
|
|
// handshake, so this timer does not need to be set explicitly at startup.
|
|
this._startPingTimer();
|
|
|
|
// If it is a ping, do not handle the message.
|
|
if (doNotHandle) {
|
|
return;
|
|
}
|
|
|
|
// A whitelist of protocol handlers. Add to these if new messages are added
|
|
// in the protocol.
|
|
let handlers = ["Hello", "Register", "Unregister", "Notification", "Broadcast"];
|
|
|
|
// Build up the handler name to call from messageType.
|
|
// e.g. messageType == "register" -> _handleRegisterReply.
|
|
let handlerName = reply.messageType[0].toUpperCase() +
|
|
reply.messageType.slice(1).toLowerCase();
|
|
|
|
if (!handlers.includes(handlerName)) {
|
|
console.warn("wsOnMessageAvailable: No whitelisted handler", handlerName,
|
|
"for message", reply.messageType);
|
|
return;
|
|
}
|
|
|
|
let handler = "_handle" + handlerName + "Reply";
|
|
|
|
if (typeof this[handler] !== "function") {
|
|
console.warn("wsOnMessageAvailable: Handler", handler,
|
|
"whitelisted but not implemented");
|
|
return;
|
|
}
|
|
|
|
this[handler](reply);
|
|
},
|
|
|
|
/**
|
|
* The websocket should never be closed. Since we don't call ws.close(),
|
|
* _wsOnStop() receives error code NS_BASE_STREAM_CLOSED (see comment in that
|
|
* function), which calls reconnect and re-establishes the WebSocket
|
|
* connection.
|
|
*
|
|
* If the server requested that we back off, we won't reconnect until the
|
|
* next network state change event, or until we need to send a new register
|
|
* request.
|
|
*/
|
|
_wsOnServerClose: function(context, aStatusCode, aReason) {
|
|
console.debug("wsOnServerClose()", aStatusCode, aReason);
|
|
|
|
if (aStatusCode == kBACKOFF_WS_STATUS_CODE) {
|
|
console.debug("wsOnServerClose: Skipping automatic reconnect");
|
|
this._skipReconnect = true;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Rejects all pending register requests with errors.
|
|
*/
|
|
_cancelPendingRequests() {
|
|
for (let request of this._pendingRequests.values()) {
|
|
request.reject(new Error("Request aborted"));
|
|
}
|
|
this._pendingRequests.clear();
|
|
},
|
|
|
|
/** Creates a case-insensitive map key for a request that expects a reply. */
|
|
_makePendingRequestKey(data) {
|
|
return (data.messageType + "|" + data.channelID).toLowerCase();
|
|
},
|
|
|
|
/** Sends a request and waits for a reply from the server. */
|
|
_sendRequestForReply(record, data) {
|
|
return Promise.resolve().then(_ => {
|
|
// start the timer since we now have at least one request
|
|
this._startRequestTimeoutTimer();
|
|
|
|
let key = this._makePendingRequestKey(data);
|
|
if (!this._pendingRequests.has(key)) {
|
|
let request = {
|
|
data: data,
|
|
record: record,
|
|
ctime: Date.now(),
|
|
};
|
|
request.promise = new Promise((resolve, reject) => {
|
|
request.resolve = resolve;
|
|
request.reject = reject;
|
|
});
|
|
this._pendingRequests.set(key, request);
|
|
this._queueRequest(data);
|
|
}
|
|
|
|
return this._pendingRequests.get(key).promise;
|
|
});
|
|
},
|
|
|
|
/** Removes and returns a pending request for a server reply. */
|
|
_takeRequestForReply(reply) {
|
|
if (typeof reply.channelID !== "string") {
|
|
return null;
|
|
}
|
|
let key = this._makePendingRequestKey(reply);
|
|
let request = this._pendingRequests.get(key);
|
|
if (!request) {
|
|
return null;
|
|
}
|
|
this._pendingRequests.delete(key);
|
|
if (!this._hasPendingRequests()) {
|
|
this._requestTimeoutTimer.cancel();
|
|
}
|
|
return request;
|
|
},
|
|
|
|
sendSubscribeBroadcast(serviceId, version) {
|
|
let data = {
|
|
messageType: "broadcast_subscribe",
|
|
broadcasts: {
|
|
[serviceId]: version
|
|
},
|
|
};
|
|
|
|
this._queueRequest(data);
|
|
},
|
|
};
|
|
|
|
function PushRecordWebSocket(record) {
|
|
PushRecord.call(this, record);
|
|
this.channelID = record.channelID;
|
|
this.version = record.version;
|
|
}
|
|
|
|
PushRecordWebSocket.prototype = Object.create(PushRecord.prototype, {
|
|
keyID: {
|
|
get() {
|
|
return this.channelID;
|
|
},
|
|
},
|
|
});
|
|
|
|
PushRecordWebSocket.prototype.toSubscription = function() {
|
|
let subscription = PushRecord.prototype.toSubscription.call(this);
|
|
subscription.version = this.version;
|
|
return subscription;
|
|
};
|