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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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services/fxaccounts/FxAccountsWebChannel.jsm Normal file
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/* 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/. */
/**
* Firefox Accounts Web Channel.
*
* Uses the WebChannel component to receive messages
* about account state changes.
*/
this.EXPORTED_SYMBOLS = ["EnsureFxAccountsWebChannel"];
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/FxAccountsCommon.js");
XPCOMUtils.defineLazyModuleGetter(this, "Services",
"resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "WebChannel",
"resource://gre/modules/WebChannel.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "fxAccounts",
"resource://gre/modules/FxAccounts.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "FxAccountsStorageManagerCanStoreField",
"resource://gre/modules/FxAccountsStorage.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Weave",
"resource://services-sync/main.js");
const COMMAND_PROFILE_CHANGE = "profile:change";
const COMMAND_CAN_LINK_ACCOUNT = "fxaccounts:can_link_account";
const COMMAND_LOGIN = "fxaccounts:login";
const COMMAND_LOGOUT = "fxaccounts:logout";
const COMMAND_DELETE = "fxaccounts:delete";
const COMMAND_SYNC_PREFERENCES = "fxaccounts:sync_preferences";
const COMMAND_CHANGE_PASSWORD = "fxaccounts:change_password";
const PREF_LAST_FXA_USER = "identity.fxaccounts.lastSignedInUserHash";
const PREF_SYNC_SHOW_CUSTOMIZATION = "services.sync-setup.ui.showCustomizationDialog";
/**
* A helper function that extracts the message and stack from an error object.
* Returns a `{ message, stack }` tuple. `stack` will be null if the error
* doesn't have a stack trace.
*/
function getErrorDetails(error) {
let details = { message: String(error), stack: null };
// Adapted from Console.jsm.
if (error.stack) {
let frames = [];
for (let frame = error.stack; frame; frame = frame.caller) {
frames.push(String(frame).padStart(4));
}
details.stack = frames.join("\n");
}
return details;
}
/**
* Create a new FxAccountsWebChannel to listen for account updates
*
* @param {Object} options Options
* @param {Object} options
* @param {String} options.content_uri
* The FxA Content server uri
* @param {String} options.channel_id
* The ID of the WebChannel
* @param {String} options.helpers
* Helpers functions. Should only be passed in for testing.
* @constructor
*/
this.FxAccountsWebChannel = function(options) {
if (!options) {
throw new Error("Missing configuration options");
}
if (!options["content_uri"]) {
throw new Error("Missing 'content_uri' option");
}
this._contentUri = options.content_uri;
if (!options["channel_id"]) {
throw new Error("Missing 'channel_id' option");
}
this._webChannelId = options.channel_id;
// options.helpers is only specified by tests.
this._helpers = options.helpers || new FxAccountsWebChannelHelpers(options);
this._setupChannel();
};
this.FxAccountsWebChannel.prototype = {
/**
* WebChannel that is used to communicate with content page
*/
_channel: null,
/**
* Helpers interface that does the heavy lifting.
*/
_helpers: null,
/**
* WebChannel ID.
*/
_webChannelId: null,
/**
* WebChannel origin, used to validate origin of messages
*/
_webChannelOrigin: null,
/**
* Release all resources that are in use.
*/
tearDown() {
this._channel.stopListening();
this._channel = null;
this._channelCallback = null;
},
/**
* Configures and registers a new WebChannel
*
* @private
*/
_setupChannel() {
// if this.contentUri is present but not a valid URI, then this will throw an error.
try {
this._webChannelOrigin = Services.io.newURI(this._contentUri, null, null);
this._registerChannel();
} catch (e) {
log.error(e);
throw e;
}
},
_receiveMessage(message, sendingContext) {
let command = message.command;
let data = message.data;
switch (command) {
case COMMAND_PROFILE_CHANGE:
Services.obs.notifyObservers(null, ON_PROFILE_CHANGE_NOTIFICATION, data.uid);
break;
case COMMAND_LOGIN:
this._helpers.login(data).catch(error =>
this._sendError(error, message, sendingContext));
break;
case COMMAND_LOGOUT:
case COMMAND_DELETE:
this._helpers.logout(data.uid).catch(error =>
this._sendError(error, message, sendingContext));
break;
case COMMAND_CAN_LINK_ACCOUNT:
let canLinkAccount = this._helpers.shouldAllowRelink(data.email);
let response = {
command: command,
messageId: message.messageId,
data: { ok: canLinkAccount }
};
log.debug("FxAccountsWebChannel response", response);
this._channel.send(response, sendingContext);
break;
case COMMAND_SYNC_PREFERENCES:
this._helpers.openSyncPreferences(sendingContext.browser, data.entryPoint);
break;
case COMMAND_CHANGE_PASSWORD:
this._helpers.changePassword(data).catch(error =>
this._sendError(error, message, sendingContext));
break;
default:
log.warn("Unrecognized FxAccountsWebChannel command", command);
break;
}
},
_sendError(error, incomingMessage, sendingContext) {
log.error("Failed to handle FxAccountsWebChannel message", error);
this._channel.send({
command: incomingMessage.command,
messageId: incomingMessage.messageId,
data: {
error: getErrorDetails(error),
},
}, sendingContext);
},
/**
* Create a new channel with the WebChannelBroker, setup a callback listener
* @private
*/
_registerChannel() {
/**
* Processes messages that are called back from the FxAccountsChannel
*
* @param webChannelId {String}
* Command webChannelId
* @param message {Object}
* Command message
* @param sendingContext {Object}
* Message sending context.
* @param sendingContext.browser {browser}
* The <browser> object that captured the
* WebChannelMessageToChrome.
* @param sendingContext.eventTarget {EventTarget}
* The <EventTarget> where the message was sent.
* @param sendingContext.principal {Principal}
* The <Principal> of the EventTarget where the message was sent.
* @private
*
*/
let listener = (webChannelId, message, sendingContext) => {
if (message) {
log.debug("FxAccountsWebChannel message received", message.command);
if (logPII) {
log.debug("FxAccountsWebChannel message details", message);
}
try {
this._receiveMessage(message, sendingContext);
} catch (error) {
this._sendError(error, message, sendingContext);
}
}
};
this._channelCallback = listener;
this._channel = new WebChannel(this._webChannelId, this._webChannelOrigin);
this._channel.listen(listener);
log.debug("FxAccountsWebChannel registered: " + this._webChannelId + " with origin " + this._webChannelOrigin.prePath);
}
};
this.FxAccountsWebChannelHelpers = function(options) {
options = options || {};
this._fxAccounts = options.fxAccounts || fxAccounts;
};
this.FxAccountsWebChannelHelpers.prototype = {
// If the last fxa account used for sync isn't this account, we display
// a modal dialog checking they really really want to do this...
// (This is sync-specific, so ideally would be in sync's identity module,
// but it's a little more seamless to do here, and sync is currently the
// only fxa consumer, so...
shouldAllowRelink(acctName) {
return !this._needRelinkWarning(acctName) ||
this._promptForRelink(acctName);
},
/**
* New users are asked in the content server whether they want to
* customize which data should be synced. The user is only shown
* the dialog listing the possible data types upon verification.
*
* Save a bit into prefs that is read on verification to see whether
* to show the list of data types that can be saved.
*/
setShowCustomizeSyncPref(showCustomizeSyncPref) {
Services.prefs.setBoolPref(PREF_SYNC_SHOW_CUSTOMIZATION, showCustomizeSyncPref);
},
getShowCustomizeSyncPref() {
return Services.prefs.getBoolPref(PREF_SYNC_SHOW_CUSTOMIZATION);
},
/**
* stores sync login info it in the fxaccounts service
*
* @param accountData the user's account data and credentials
*/
login(accountData) {
if (accountData.customizeSync) {
this.setShowCustomizeSyncPref(true);
delete accountData.customizeSync;
}
if (accountData.declinedSyncEngines) {
let declinedSyncEngines = accountData.declinedSyncEngines;
log.debug("Received declined engines", declinedSyncEngines);
Weave.Service.engineManager.setDeclined(declinedSyncEngines);
declinedSyncEngines.forEach(engine => {
Services.prefs.setBoolPref("services.sync.engine." + engine, false);
});
// if we got declinedSyncEngines that means we do not need to show the customize screen.
this.setShowCustomizeSyncPref(false);
delete accountData.declinedSyncEngines;
}
// the user has already been shown the "can link account"
// screen. No need to keep this data around.
delete accountData.verifiedCanLinkAccount;
// Remember who it was so we can log out next time.
this.setPreviousAccountNameHashPref(accountData.email);
// A sync-specific hack - we want to ensure sync has been initialized
// before we set the signed-in user.
let xps = Cc["@mozilla.org/weave/service;1"]
.getService(Ci.nsISupports)
.wrappedJSObject;
return xps.whenLoaded().then(() => {
return this._fxAccounts.setSignedInUser(accountData);
});
},
/**
* logout the fxaccounts service
*
* @param the uid of the account which have been logged out
*/
logout(uid) {
return fxAccounts.getSignedInUser().then(userData => {
if (userData.uid === uid) {
// true argument is `localOnly`, because server-side stuff
// has already been taken care of by the content server
return fxAccounts.signOut(true);
}
});
},
changePassword(credentials) {
// If |credentials| has fields that aren't handled by accounts storage,
// updateUserAccountData will throw - mainly to prevent errors in code
// that hard-codes field names.
// However, in this case the field names aren't really in our control.
// We *could* still insist the server know what fields names are valid,
// but that makes life difficult for the server when Firefox adds new
// features (ie, new fields) - forcing the server to track a map of
// versions to supported field names doesn't buy us much.
// So we just remove field names we know aren't handled.
let newCredentials = {
deviceId: null
};
for (let name of Object.keys(credentials)) {
if (name == "email" || name == "uid" || FxAccountsStorageManagerCanStoreField(name)) {
newCredentials[name] = credentials[name];
} else {
log.info("changePassword ignoring unsupported field", name);
}
}
return this._fxAccounts.updateUserAccountData(newCredentials)
.then(() => this._fxAccounts.updateDeviceRegistration());
},
/**
* Get the hash of account name of the previously signed in account
*/
getPreviousAccountNameHashPref() {
try {
return Services.prefs.getComplexValue(PREF_LAST_FXA_USER, Ci.nsISupportsString).data;
} catch (_) {
return "";
}
},
/**
* Given an account name, set the hash of the previously signed in account
*
* @param acctName the account name of the user's account.
*/
setPreviousAccountNameHashPref(acctName) {
let string = Cc["@mozilla.org/supports-string;1"]
.createInstance(Ci.nsISupportsString);
string.data = this.sha256(acctName);
Services.prefs.setComplexValue(PREF_LAST_FXA_USER, Ci.nsISupportsString, string);
},
/**
* Given a string, returns the SHA265 hash in base64
*/
sha256(str) {
let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
.createInstance(Ci.nsIScriptableUnicodeConverter);
converter.charset = "UTF-8";
// Data is an array of bytes.
let data = converter.convertToByteArray(str, {});
let hasher = Cc["@mozilla.org/security/hash;1"]
.createInstance(Ci.nsICryptoHash);
hasher.init(hasher.SHA256);
hasher.update(data, data.length);
return hasher.finish(true);
},
/**
* Open Sync Preferences in the current tab of the browser
*
* @param {Object} browser the browser in which to open preferences
* @param {String} [entryPoint] entryPoint to use for logging
*/
openSyncPreferences(browser, entryPoint) {
let uri = "about:preferences";
if (entryPoint) {
uri += "?entrypoint=" + encodeURIComponent(entryPoint);
}
uri += "#sync";
browser.loadURI(uri);
},
/**
* If a user signs in using a different account, the data from the
* previous account and the new account will be merged. Ask the user
* if they want to continue.
*
* @private
*/
_needRelinkWarning(acctName) {
let prevAcctHash = this.getPreviousAccountNameHashPref();
return prevAcctHash && prevAcctHash != this.sha256(acctName);
},
/**
* Show the user a warning dialog that the data from the previous account
* and the new account will be merged.
*
* @private
*/
_promptForRelink(acctName) {
let sb = Services.strings.createBundle("chrome://browser/locale/syncSetup.properties");
let continueLabel = sb.GetStringFromName("continue.label");
let title = sb.GetStringFromName("relinkVerify.title");
let description = sb.formatStringFromName("relinkVerify.description",
[acctName], 1);
let body = sb.GetStringFromName("relinkVerify.heading") +
"\n\n" + description;
let ps = Services.prompt;
let buttonFlags = (ps.BUTTON_POS_0 * ps.BUTTON_TITLE_IS_STRING) +
(ps.BUTTON_POS_1 * ps.BUTTON_TITLE_CANCEL) +
ps.BUTTON_POS_1_DEFAULT;
// If running in context of the browser chrome, window does not exist.
var targetWindow = typeof window === 'undefined' ? null : window;
let pressed = Services.prompt.confirmEx(targetWindow, title, body, buttonFlags,
continueLabel, null, null, null,
{});
return pressed === 0; // 0 is the "continue" button
}
};
var singleton;
// The entry-point for this module, which ensures only one of our channels is
// ever created - we require this because the WebChannel is global in scope
// (eg, it uses the observer service to tell interested parties of interesting
// things) and allowing multiple channels would cause such notifications to be
// sent multiple times.
this.EnsureFxAccountsWebChannel = function() {
let contentUri = Services.urlFormatter.formatURLPref("identity.fxaccounts.remote.webchannel.uri");
if (singleton && singleton._contentUri !== contentUri) {
singleton.tearDown();
singleton = null;
}
if (!singleton) {
try {
if (contentUri) {
// The FxAccountsWebChannel listens for events and updates
// the state machine accordingly.
singleton = new this.FxAccountsWebChannel({
content_uri: contentUri,
channel_id: WEBCHANNEL_ID,
});
} else {
log.warn("FxA WebChannel functionaly is disabled due to no URI pref.");
}
} catch (ex) {
log.error("Failed to create FxA WebChannel", ex);
}
}
}