зеркало из https://github.com/mozilla/gecko-dev.git
1313 строки
37 KiB
JavaScript
1313 строки
37 KiB
JavaScript
/* jshint moz: true, esnext: true */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
"use strict";
|
|
|
|
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
|
|
const { XPCOMUtils } = ChromeUtils.import(
|
|
"resource://gre/modules/XPCOMUtils.jsm"
|
|
);
|
|
|
|
const { PushDB } = ChromeUtils.import("resource://gre/modules/PushDB.jsm");
|
|
const { PushRecord } = ChromeUtils.import(
|
|
"resource://gre/modules/PushRecord.jsm"
|
|
);
|
|
const { PushCrypto } = ChromeUtils.import(
|
|
"resource://gre/modules/PushCrypto.jsm"
|
|
);
|
|
|
|
ChromeUtils.defineModuleGetter(
|
|
this,
|
|
"pushBroadcastService",
|
|
"resource://gre/modules/PushBroadcastService.jsm"
|
|
);
|
|
ChromeUtils.defineModuleGetter(
|
|
this,
|
|
"ObjectUtils",
|
|
"resource://gre/modules/ObjectUtils.jsm"
|
|
);
|
|
|
|
const kPUSHWSDB_DB_NAME = "pushapi";
|
|
const kPUSHWSDB_DB_VERSION = 5; // Change this if the IndexedDB format changes
|
|
const kPUSHWSDB_STORE_NAME = "pushapi";
|
|
|
|
// WebSocket close code sent by the server to indicate that the client should
|
|
// not automatically reconnect.
|
|
const kBACKOFF_WS_STATUS_CODE = 4774;
|
|
|
|
// Maps ack statuses, unsubscribe reasons, and delivery error reasons to codes
|
|
// included in request payloads.
|
|
const kACK_STATUS_TO_CODE = {
|
|
[Ci.nsIPushErrorReporter.ACK_DELIVERED]: 100,
|
|
[Ci.nsIPushErrorReporter.ACK_DECRYPTION_ERROR]: 101,
|
|
[Ci.nsIPushErrorReporter.ACK_NOT_DELIVERED]: 102,
|
|
};
|
|
|
|
const kUNREGISTER_REASON_TO_CODE = {
|
|
[Ci.nsIPushErrorReporter.UNSUBSCRIBE_MANUAL]: 200,
|
|
[Ci.nsIPushErrorReporter.UNSUBSCRIBE_QUOTA_EXCEEDED]: 201,
|
|
[Ci.nsIPushErrorReporter.UNSUBSCRIBE_PERMISSION_REVOKED]: 202,
|
|
};
|
|
|
|
const kDELIVERY_REASON_TO_CODE = {
|
|
[Ci.nsIPushErrorReporter.DELIVERY_UNCAUGHT_EXCEPTION]: 301,
|
|
[Ci.nsIPushErrorReporter.DELIVERY_UNHANDLED_REJECTION]: 302,
|
|
[Ci.nsIPushErrorReporter.DELIVERY_INTERNAL_ERROR]: 303,
|
|
};
|
|
|
|
const prefs = Services.prefs.getBranch("dom.push.");
|
|
|
|
const EXPORTED_SYMBOLS = ["PushServiceWebSocket"];
|
|
|
|
XPCOMUtils.defineLazyGetter(this, "console", () => {
|
|
let { ConsoleAPI } = ChromeUtils.import("resource://gre/modules/Console.jsm");
|
|
return new ConsoleAPI({
|
|
maxLogLevelPref: "dom.push.loglevel",
|
|
prefix: "PushServiceWebSocket",
|
|
});
|
|
});
|
|
|
|
/**
|
|
* A proxy between the PushService and the WebSocket. The listener is used so
|
|
* that the PushService can silence messages from the WebSocket by setting
|
|
* PushWebSocketListener._pushService to null. This is required because
|
|
* a WebSocket can continue to send messages or errors after it has been
|
|
* closed but the PushService may not be interested in these. It's easier to
|
|
* stop listening than to have checks at specific points.
|
|
*/
|
|
var PushWebSocketListener = function(pushService) {
|
|
this._pushService = pushService;
|
|
};
|
|
|
|
PushWebSocketListener.prototype = {
|
|
onStart(context) {
|
|
if (!this._pushService) {
|
|
return;
|
|
}
|
|
this._pushService._wsOnStart(context);
|
|
},
|
|
|
|
onStop(context, statusCode) {
|
|
if (!this._pushService) {
|
|
return;
|
|
}
|
|
this._pushService._wsOnStop(context, statusCode);
|
|
},
|
|
|
|
onAcknowledge(context, size) {
|
|
// EMPTY
|
|
},
|
|
|
|
onBinaryMessageAvailable(context, message) {
|
|
// EMPTY
|
|
},
|
|
|
|
onMessageAvailable(context, message) {
|
|
if (!this._pushService) {
|
|
return;
|
|
}
|
|
this._pushService._wsOnMessageAvailable(context, message);
|
|
},
|
|
|
|
onServerClose(context, aStatusCode, aReason) {
|
|
if (!this._pushService) {
|
|
return;
|
|
}
|
|
this._pushService._wsOnServerClose(context, aStatusCode, aReason);
|
|
},
|
|
};
|
|
|
|
// websocket states
|
|
// websocket is off
|
|
const STATE_SHUT_DOWN = 0;
|
|
// Websocket has been opened on client side, waiting for successful open.
|
|
// (_wsOnStart)
|
|
const STATE_WAITING_FOR_WS_START = 1;
|
|
// Websocket opened, hello sent, waiting for server reply (_handleHelloReply).
|
|
const STATE_WAITING_FOR_HELLO = 2;
|
|
// Websocket operational, handshake completed, begin protocol messaging.
|
|
const STATE_READY = 3;
|
|
|
|
var PushServiceWebSocket = {
|
|
_mainPushService: null,
|
|
_serverURI: null,
|
|
_currentlyRegistering: new Set(),
|
|
|
|
newPushDB() {
|
|
return new PushDB(
|
|
kPUSHWSDB_DB_NAME,
|
|
kPUSHWSDB_DB_VERSION,
|
|
kPUSHWSDB_STORE_NAME,
|
|
"channelID",
|
|
PushRecordWebSocket
|
|
);
|
|
},
|
|
|
|
disconnect() {
|
|
this._shutdownWS();
|
|
},
|
|
|
|
observe(aSubject, aTopic, aData) {
|
|
if (aTopic == "nsPref:changed" && aData == "dom.push.userAgentID") {
|
|
this._onUAIDChanged();
|
|
} else if (aTopic == "timer-callback") {
|
|
this._onTimerFired(aSubject);
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Handles a UAID change. Unlike reconnects, we cancel all pending requests
|
|
* after disconnecting. Existing subscriptions stored in IndexedDB will be
|
|
* dropped on reconnect.
|
|
*/
|
|
_onUAIDChanged() {
|
|
console.debug("onUAIDChanged()");
|
|
|
|
this._shutdownWS();
|
|
this._startBackoffTimer();
|
|
},
|
|
|
|
/** Handles a ping, backoff, or request timeout timer event. */
|
|
_onTimerFired(timer) {
|
|
console.debug("onTimerFired()");
|
|
|
|
if (timer == this._pingTimer) {
|
|
this._sendPing();
|
|
return;
|
|
}
|
|
|
|
if (timer == this._backoffTimer) {
|
|
console.debug("onTimerFired: Reconnecting after backoff");
|
|
this._beginWSSetup();
|
|
return;
|
|
}
|
|
|
|
if (timer == this._requestTimeoutTimer) {
|
|
this._timeOutRequests();
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Sends a ping to the server. Bypasses the request queue, but starts the
|
|
* request timeout timer. If the socket is already closed, or the server
|
|
* does not respond within the timeout, the client will reconnect.
|
|
*/
|
|
_sendPing() {
|
|
console.debug("sendPing()");
|
|
|
|
this._startRequestTimeoutTimer();
|
|
try {
|
|
this._wsSendMessage({});
|
|
this._lastPingTime = Date.now();
|
|
} catch (e) {
|
|
console.debug("sendPing: Error sending ping", e);
|
|
this._reconnect();
|
|
}
|
|
},
|
|
|
|
/** Times out any pending requests. */
|
|
_timeOutRequests() {
|
|
console.debug("timeOutRequests()");
|
|
|
|
if (!this._hasPendingRequests()) {
|
|
// Cancel the repeating timer and exit early if we aren't waiting for
|
|
// pongs or requests.
|
|
this._requestTimeoutTimer.cancel();
|
|
return;
|
|
}
|
|
|
|
let now = Date.now();
|
|
|
|
// Set to true if at least one request timed out, or we're still waiting
|
|
// for a pong after the request timeout.
|
|
let requestTimedOut = false;
|
|
|
|
if (
|
|
this._lastPingTime > 0 &&
|
|
now - this._lastPingTime > this._requestTimeout
|
|
) {
|
|
console.debug("timeOutRequests: Did not receive pong in time");
|
|
requestTimedOut = true;
|
|
} else {
|
|
for (let [key, request] of this._pendingRequests) {
|
|
let duration = now - request.ctime;
|
|
// If any of the registration requests time out, all the ones after it
|
|
// also made to fail, since we are going to be disconnecting the
|
|
// socket.
|
|
requestTimedOut |= duration > this._requestTimeout;
|
|
if (requestTimedOut) {
|
|
request.reject(new Error("Request timed out: " + key));
|
|
this._pendingRequests.delete(key);
|
|
}
|
|
}
|
|
}
|
|
|
|
// The most likely reason for a pong or registration request timing out is
|
|
// that the socket has disconnected. Best to reconnect.
|
|
if (requestTimedOut) {
|
|
this._reconnect();
|
|
}
|
|
},
|
|
|
|
get _UAID() {
|
|
return prefs.getStringPref("userAgentID");
|
|
},
|
|
|
|
set _UAID(newID) {
|
|
if (typeof newID !== "string") {
|
|
console.warn(
|
|
"Got invalid, non-string UAID",
|
|
newID,
|
|
"Not updating userAgentID"
|
|
);
|
|
return;
|
|
}
|
|
console.debug("New _UAID", newID);
|
|
prefs.setStringPref("userAgentID", newID);
|
|
},
|
|
|
|
_ws: null,
|
|
_pendingRequests: new Map(),
|
|
_currentState: STATE_SHUT_DOWN,
|
|
_requestTimeout: 0,
|
|
_requestTimeoutTimer: null,
|
|
_retryFailCount: 0,
|
|
|
|
/**
|
|
* According to the WS spec, servers should immediately close the underlying
|
|
* TCP connection after they close a WebSocket. This causes wsOnStop to be
|
|
* called with error NS_BASE_STREAM_CLOSED. Since the client has to keep the
|
|
* WebSocket up, it should try to reconnect. But if the server closes the
|
|
* WebSocket because it wants the client to back off, then the client
|
|
* shouldn't re-establish the connection. If the server sends the backoff
|
|
* close code, this field will be set to true in wsOnServerClose. It is
|
|
* checked in wsOnStop.
|
|
*/
|
|
_skipReconnect: false,
|
|
|
|
/** Indicates whether the server supports Web Push-style message delivery. */
|
|
_dataEnabled: false,
|
|
|
|
/**
|
|
* The last time the client sent a ping to the server. If non-zero, keeps the
|
|
* request timeout timer active. Reset to zero when the server responds with
|
|
* a pong or pending messages.
|
|
*/
|
|
_lastPingTime: 0,
|
|
|
|
/**
|
|
* A one-shot timer used to ping the server, to avoid timing out idle
|
|
* connections. Reset to the ping interval on each incoming message.
|
|
*/
|
|
_pingTimer: null,
|
|
|
|
/** A one-shot timer fired after the reconnect backoff period. */
|
|
_backoffTimer: null,
|
|
|
|
/**
|
|
* Sends a message to the Push Server through an open websocket.
|
|
* typeof(msg) shall be an object
|
|
*/
|
|
_wsSendMessage(msg) {
|
|
if (!this._ws) {
|
|
console.warn(
|
|
"wsSendMessage: No WebSocket initialized.",
|
|
"Cannot send a message"
|
|
);
|
|
return;
|
|
}
|
|
msg = JSON.stringify(msg);
|
|
console.debug("wsSendMessage: Sending message", msg);
|
|
this._ws.sendMsg(msg);
|
|
},
|
|
|
|
init(options, mainPushService, serverURI) {
|
|
console.debug("init()");
|
|
|
|
this._mainPushService = mainPushService;
|
|
this._serverURI = serverURI;
|
|
// Filled in at connect() time
|
|
this._broadcastListeners = null;
|
|
|
|
// Override the default WebSocket factory function. The returned object
|
|
// must be null or satisfy the nsIWebSocketChannel interface. Used by
|
|
// the tests to provide a mock WebSocket implementation.
|
|
if (options.makeWebSocket) {
|
|
this._makeWebSocket = options.makeWebSocket;
|
|
}
|
|
|
|
this._requestTimeout = prefs.getIntPref("requestTimeout");
|
|
|
|
return Promise.resolve();
|
|
},
|
|
|
|
_reconnect() {
|
|
console.debug("reconnect()");
|
|
this._shutdownWS(false);
|
|
this._startBackoffTimer();
|
|
},
|
|
|
|
_shutdownWS(shouldCancelPending = true) {
|
|
console.debug("shutdownWS()");
|
|
|
|
if (this._currentState == STATE_READY) {
|
|
prefs.removeObserver("userAgentID", this);
|
|
}
|
|
|
|
this._currentState = STATE_SHUT_DOWN;
|
|
this._skipReconnect = false;
|
|
|
|
if (this._wsListener) {
|
|
this._wsListener._pushService = null;
|
|
}
|
|
try {
|
|
this._ws.close(0, null);
|
|
} catch (e) {}
|
|
this._ws = null;
|
|
|
|
this._lastPingTime = 0;
|
|
|
|
if (this._pingTimer) {
|
|
this._pingTimer.cancel();
|
|
}
|
|
|
|
if (shouldCancelPending) {
|
|
this._cancelPendingRequests();
|
|
}
|
|
|
|
if (this._notifyRequestQueue) {
|
|
this._notifyRequestQueue();
|
|
this._notifyRequestQueue = null;
|
|
}
|
|
},
|
|
|
|
uninit() {
|
|
// All pending requests (ideally none) are dropped at this point. We
|
|
// shouldn't have any applications performing registration/unregistration
|
|
// or receiving notifications.
|
|
this._shutdownWS();
|
|
|
|
if (this._backoffTimer) {
|
|
this._backoffTimer.cancel();
|
|
}
|
|
if (this._requestTimeoutTimer) {
|
|
this._requestTimeoutTimer.cancel();
|
|
}
|
|
|
|
this._mainPushService = null;
|
|
|
|
this._dataEnabled = false;
|
|
},
|
|
|
|
/**
|
|
* How retries work: If the WS is closed due to a socket error,
|
|
* _startBackoffTimer() is called. The retry timer is started and when
|
|
* it times out, beginWSSetup() is called again.
|
|
*
|
|
* If we are in the middle of a timeout (i.e. waiting), but
|
|
* a register/unregister is called, we don't want to wait around anymore.
|
|
* _sendRequest will automatically call beginWSSetup(), which will cancel the
|
|
* timer. In addition since the state will have changed, even if a pending
|
|
* timer event comes in (because the timer fired the event before it was
|
|
* cancelled), so the connection won't be reset.
|
|
*/
|
|
_startBackoffTimer() {
|
|
console.debug("startBackoffTimer()");
|
|
|
|
// Calculate new timeout, but cap it to pingInterval.
|
|
let retryTimeout =
|
|
prefs.getIntPref("retryBaseInterval") * Math.pow(2, this._retryFailCount);
|
|
retryTimeout = Math.min(retryTimeout, prefs.getIntPref("pingInterval"));
|
|
|
|
this._retryFailCount++;
|
|
|
|
console.debug(
|
|
"startBackoffTimer: Retry in",
|
|
retryTimeout,
|
|
"Try number",
|
|
this._retryFailCount
|
|
);
|
|
|
|
if (!this._backoffTimer) {
|
|
this._backoffTimer = Cc["@mozilla.org/timer;1"].createInstance(
|
|
Ci.nsITimer
|
|
);
|
|
}
|
|
this._backoffTimer.init(this, retryTimeout, Ci.nsITimer.TYPE_ONE_SHOT);
|
|
},
|
|
|
|
/** Indicates whether we're waiting for pongs or requests. */
|
|
_hasPendingRequests() {
|
|
return this._lastPingTime > 0 || this._pendingRequests.size > 0;
|
|
},
|
|
|
|
/**
|
|
* Starts the request timeout timer unless we're already waiting for a pong
|
|
* or register request.
|
|
*/
|
|
_startRequestTimeoutTimer() {
|
|
if (this._hasPendingRequests()) {
|
|
return;
|
|
}
|
|
if (!this._requestTimeoutTimer) {
|
|
this._requestTimeoutTimer = Cc["@mozilla.org/timer;1"].createInstance(
|
|
Ci.nsITimer
|
|
);
|
|
}
|
|
this._requestTimeoutTimer.init(
|
|
this,
|
|
this._requestTimeout,
|
|
Ci.nsITimer.TYPE_REPEATING_SLACK
|
|
);
|
|
},
|
|
|
|
/** Starts or resets the ping timer. */
|
|
_startPingTimer() {
|
|
if (!this._pingTimer) {
|
|
this._pingTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
|
|
}
|
|
this._pingTimer.init(
|
|
this,
|
|
prefs.getIntPref("pingInterval"),
|
|
Ci.nsITimer.TYPE_ONE_SHOT
|
|
);
|
|
},
|
|
|
|
_makeWebSocket(uri) {
|
|
if (!prefs.getBoolPref("connection.enabled")) {
|
|
console.warn(
|
|
"makeWebSocket: connection.enabled is not set to true.",
|
|
"Aborting."
|
|
);
|
|
return null;
|
|
}
|
|
if (Services.io.offline) {
|
|
console.warn("makeWebSocket: Network is offline.");
|
|
return null;
|
|
}
|
|
let contractId =
|
|
uri.scheme == "ws"
|
|
? "@mozilla.org/network/protocol;1?name=ws"
|
|
: "@mozilla.org/network/protocol;1?name=wss";
|
|
let socket = Cc[contractId].createInstance(Ci.nsIWebSocketChannel);
|
|
|
|
socket.initLoadInfo(
|
|
null, // aLoadingNode
|
|
Services.scriptSecurityManager.getSystemPrincipal(),
|
|
null, // aTriggeringPrincipal
|
|
Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
|
|
Ci.nsIContentPolicy.TYPE_WEBSOCKET
|
|
);
|
|
// Allow deprecated HTTP request from SystemPrincipal
|
|
socket.loadInfo.allowDeprecatedSystemRequests = true;
|
|
|
|
return socket;
|
|
},
|
|
|
|
_beginWSSetup() {
|
|
console.debug("beginWSSetup()");
|
|
if (this._currentState != STATE_SHUT_DOWN) {
|
|
console.error(
|
|
"_beginWSSetup: Not in shutdown state! Current state",
|
|
this._currentState
|
|
);
|
|
return;
|
|
}
|
|
|
|
// Stop any pending reconnects scheduled for the near future.
|
|
if (this._backoffTimer) {
|
|
this._backoffTimer.cancel();
|
|
}
|
|
|
|
let uri = this._serverURI;
|
|
if (!uri) {
|
|
return;
|
|
}
|
|
let socket = this._makeWebSocket(uri);
|
|
if (!socket) {
|
|
return;
|
|
}
|
|
this._ws = socket.QueryInterface(Ci.nsIWebSocketChannel);
|
|
|
|
console.debug("beginWSSetup: Connecting to", uri.spec);
|
|
this._wsListener = new PushWebSocketListener(this);
|
|
this._ws.protocol = "push-notification";
|
|
|
|
try {
|
|
// Grab a wakelock before we open the socket to ensure we don't go to
|
|
// sleep before connection the is opened.
|
|
this._ws.asyncOpen(uri, uri.spec, 0, this._wsListener, null);
|
|
this._currentState = STATE_WAITING_FOR_WS_START;
|
|
} catch (e) {
|
|
console.error(
|
|
"beginWSSetup: Error opening websocket.",
|
|
"asyncOpen failed",
|
|
e
|
|
);
|
|
this._reconnect();
|
|
}
|
|
},
|
|
|
|
connect(broadcastListeners) {
|
|
console.debug("connect()", broadcastListeners);
|
|
this._broadcastListeners = broadcastListeners;
|
|
this._beginWSSetup();
|
|
},
|
|
|
|
isConnected() {
|
|
return !!this._ws;
|
|
},
|
|
|
|
/**
|
|
* Protocol handler invoked by server message.
|
|
*/
|
|
_handleHelloReply(reply) {
|
|
console.debug("handleHelloReply()");
|
|
if (this._currentState != STATE_WAITING_FOR_HELLO) {
|
|
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.addObserver("userAgentID", this);
|
|
|
|
// Handle broadcasts received in response to the "hello" message.
|
|
if (!ObjectUtils.isEmpty(reply.broadcasts)) {
|
|
// The reply isn't technically a broadcast message, but it has
|
|
// the shape of a broadcast message (it has a broadcasts field).
|
|
const context = { phase: pushBroadcastService.PHASES.HELLO };
|
|
this._mainPushService.receivedBroadcastMessage(reply, context);
|
|
}
|
|
|
|
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(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(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(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(reply) {
|
|
let phase = pushBroadcastService.PHASES.BROADCAST;
|
|
// Check if this reply is the result of registration.
|
|
for (const id of Object.keys(reply.broadcasts)) {
|
|
const wasRegistering = this._currentlyRegistering.delete(id);
|
|
if (wasRegistering) {
|
|
// If we get multiple broadcasts and only one is "registering",
|
|
// then we consider the phase to be REGISTER for all of them.
|
|
// It is acceptable since registrations do not happen so often,
|
|
// and are all very likely to occur soon after browser startup.
|
|
phase = pushBroadcastService.PHASES.REGISTER;
|
|
}
|
|
}
|
|
const context = { phase };
|
|
this._mainPushService.receivedBroadcastMessage(reply, context);
|
|
},
|
|
|
|
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 };
|
|
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, version, code }] };
|
|
this._queueRequest(data);
|
|
},
|
|
|
|
_generateID() {
|
|
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,
|
|
};
|
|
|
|
return this._sendRequestForReply(record, data);
|
|
});
|
|
},
|
|
|
|
_queueStart: Promise.resolve(),
|
|
_notifyRequestQueue: null,
|
|
_queue: null,
|
|
_enqueue(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(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(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;
|
|
}
|
|
|
|
this._mainPushService
|
|
.getAllUnexpired()
|
|
.then(
|
|
records => this._sendHello(records),
|
|
err => {
|
|
console.warn(
|
|
"Error fetching existing records before handshake; assuming none",
|
|
err
|
|
);
|
|
this._sendHello([]);
|
|
}
|
|
)
|
|
.catch(err => {
|
|
// If we failed to send the handshake, back off and reconnect.
|
|
console.warn("Failed to send handshake; reconnecting", err);
|
|
this._reconnect();
|
|
});
|
|
},
|
|
|
|
/**
|
|
* Sends a `hello` handshake to the server.
|
|
*
|
|
* @param {Array<PushRecordWebSocket>} An array of records for existing
|
|
* subscriptions, used to determine whether to rotate our UAID.
|
|
*/
|
|
_sendHello(records) {
|
|
let data = {
|
|
messageType: "hello",
|
|
broadcasts: this._broadcastListeners,
|
|
use_webpush: true,
|
|
};
|
|
|
|
if (records.length && this._UAID) {
|
|
// Only send our UAID if we have existing push subscriptions, to
|
|
// avoid tying a persistent identifier to the connection (bug
|
|
// 1617136). The push server will issue our client a new UAID in
|
|
// the `hello` response, which we'll store until either the next
|
|
// time we reconnect, or the user subscribes to push. Once we have a
|
|
// push subscription, we'll stop rotating the UAID when we connect,
|
|
// so that we can receive push messages for them.
|
|
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(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(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(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,
|
|
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) {
|
|
this._currentlyRegistering.add(serviceId);
|
|
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;
|
|
};
|