1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/* 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/. */
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/FileUtils.jsm");
Cu.import("resource://gre/modules/Promise.jsm");
Cu.import("resource://services-sync/util.js");
const SYNC_PREFS_BRANCH = "services.sync.";
/**
* Sync's XPCOM service.
*
* It is named "Weave" for historical reasons.
*
* It's worth noting how Sync is lazily loaded. We register a timer that
* loads Sync a few seconds after app startup. This is so Sync does not
* adversely affect application start time.
*
* If Sync is not configured, no extra Sync code is loaded. If an
* external component (say the UI) needs to interact with Sync, it
* should use the promise-base function whenLoaded() - something like the
* following:
*
* // 1. Grab a handle to the Sync XPCOM service.
* let service = Cc["@mozilla.org/weave/service;1"]
* .getService(Components.interfaces.nsISupports)
* .wrappedJSObject;
*
* // 2. Use the .then method of the promise.
* service.whenLoaded().then(() => {
* // You are free to interact with "Weave." objects.
* return;
* });
*
* And that's it! However, if you really want to avoid promises and do it
* old-school, then
*
* // 1. Get a reference to the service as done in (1) above.
*
* // 2. Check if the service has been initialized.
* if (service.ready) {
* // You are free to interact with "Weave." objects.
* return;
* }
*
* // 3. Install "ready" listener.
* Services.obs.addObserver(function onReady() {
* Services.obs.removeObserver(onReady, "weave:service:ready");
*
* // You are free to interact with "Weave." objects.
* }, "weave:service:ready", false);
*
* // 4. Trigger loading of Sync.
* service.ensureLoaded();
*/
function WeaveService() {
this.wrappedJSObject = this;
this.ready = false;
}
WeaveService.prototype = {
classID: Components.ID("{74b89fb0-f200-4ae8-a3ec-dd164117f6de}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
Ci.nsISupportsWeakReference]),
ensureLoaded: function () {
// If we are loaded and not using FxA, load the migration module.
if (!this.fxAccountsEnabled) {
Cu.import("resource://services-sync/FxaMigrator.jsm");
}
Components.utils.import("resource://services-sync/main.js");
// Side-effect of accessing the service is that it is instantiated.
Weave.Service;
},
whenLoaded: function() {
if (this.ready) {
return Promise.resolve();
}
let deferred = Promise.defer();
Services.obs.addObserver(function onReady() {
Services.obs.removeObserver(onReady, "weave:service:ready");
deferred.resolve();
}, "weave:service:ready", false);
this.ensureLoaded();
return deferred.promise;
},
/**
* Whether Firefox Accounts is enabled.
*
* @return bool
*/
get fxAccountsEnabled() {
try {
// Old sync guarantees '@' will never appear in the username while FxA
// uses the FxA email address - so '@' is the flag we use.
let username = Services.prefs.getCharPref(SYNC_PREFS_BRANCH + "username");
return !username || username.includes('@');
} catch (_) {
return true; // No username == only allow FxA to be configured.
}
},
/**
* Whether Sync appears to be enabled.
*
* This returns true if all the Sync preferences for storing account
* and server configuration are populated.
*
* It does *not* perform a robust check to see if the client is working.
* For that, you'll want to check Weave.Status.checkSetup().
*/
get enabled() {
let prefs = Services.prefs.getBranch(SYNC_PREFS_BRANCH);
return prefs.prefHasUserValue("username");
},
observe: function (subject, topic, data) {
switch (topic) {
case "app-startup":
let os = Cc["@mozilla.org/observer-service;1"].
getService(Ci.nsIObserverService);
os.addObserver(this, "final-ui-startup", true);
break;
case "final-ui-startup":
// Force Weave service to load if it hasn't triggered from overlays
this.timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
this.timer.initWithCallback({
notify: function() {
let isConfigured = false;
// We only load more if it looks like Sync is configured.
let prefs = Services.prefs.getBranch(SYNC_PREFS_BRANCH);
if (prefs.prefHasUserValue("username")) {
// We have a username. So, do a more thorough check. This will
// import a number of modules and thus increase memory
// accordingly. We could potentially copy code performed by
// this check into this file if our above code is yielding too
// many false positives.
Components.utils.import("resource://services-sync/main.js");
isConfigured = Weave.Status.checkSetup() != Weave.CLIENT_NOT_CONFIGURED;
}
let getHistogramById = Services.telemetry.getHistogramById;
getHistogramById("WEAVE_CONFIGURED").add(isConfigured);
if (isConfigured) {
getHistogramById("WEAVE_CONFIGURED_MASTER_PASSWORD").add(Utils.mpEnabled());
this.ensureLoaded();
}
}.bind(this)
}, 10000, Ci.nsITimer.TYPE_ONE_SHOT);
break;
}
}
};
function AboutWeaveLog() {}
AboutWeaveLog.prototype = {
classID: Components.ID("{d28f8a0b-95da-48f4-b712-caf37097be41}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIAboutModule,
Ci.nsISupportsWeakReference]),
getURIFlags: function(aURI) {
return 0;
},
newChannel: function(aURI, aLoadInfo) {
let dir = FileUtils.getDir("ProfD", ["weave", "logs"], true);
let uri = Services.io.newFileURI(dir);
let channel = Services.io.newChannelFromURIWithLoadInfo(uri, aLoadInfo);
channel.originalURI = aURI;
// Ensure that the about page has the same privileges as a regular directory
// view. That way links to files can be opened. make sure we use the correct
// origin attributes when creating the principal for accessing the
// about:sync-log data.
let ssm = Cc["@mozilla.org/scriptsecuritymanager;1"]
.getService(Ci.nsIScriptSecurityManager);
let principal = ssm.createCodebasePrincipal(uri, aLoadInfo.originAttributes);
channel.owner = principal;
return channel;
}
};
const components = [WeaveService, AboutWeaveLog];
this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);
|
