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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/. */
"use strict";
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
Components.utils.import("resource://gre/modules/Services.jsm");
const kMissingAPIMessage = "Unsupported blocklist call in the child process."
/*
* A lightweight blocklist proxy for the content process that traps plugin
* related blocklist checks and forwards them to the parent. This interface is
* primarily designed to insure overlays work.. it does not control plugin
* or addon loading.
*/
function Blocklist() {
this.init();
}
Blocklist.prototype = {
classID: Components.ID("{e0a106ed-6ad4-47a4-b6af-2f1c8aa4712d}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
Ci.nsIBlocklistService]),
init: function() {
Services.cpmm.addMessageListener("Blocklist:blocklistInvalidated", this);
Services.obs.addObserver(this, "xpcom-shutdown", false);
},
uninit: function() {
Services.cpmm.removeMessageListener("Blocklist:blocklistInvalidated", this);
Services.obs.removeObserver(this, "xpcom-shutdown", false);
},
observe: function(aSubject, aTopic, aData) {
switch (aTopic) {
case "xpcom-shutdown":
this.uninit();
break;
}
},
// Message manager message handlers
receiveMessage: function(aMsg) {
switch (aMsg.name) {
case "Blocklist:blocklistInvalidated":
Services.obs.notifyObservers(null, "blocklist-updated", null);
Services.cpmm.sendAsyncMessage("Blocklist:content-blocklist-updated");
break;
default:
throw new Error("Unknown blocklist message received from content: " + aMsg.name);
}
},
/*
* A helper that queries key data from a plugin or addon object
* and generates a simple data wrapper suitable for ipc. We hand
* these directly to the nsBlockListService in the parent which
* doesn't query for much.. allowing us to get away with this.
*/
flattenObject: function(aTag) {
// Based on debugging the nsBlocklistService, these are the props the
// parent side will check on our objects.
let props = ["name", "description", "filename", "version"];
let dataWrapper = {};
for (let prop of props) {
dataWrapper[prop] = aTag[prop];
}
return dataWrapper;
},
// We support the addon methods here for completeness, but content currently
// only calls getPluginBlocklistState.
isAddonBlocklisted: function(aAddon, aAppVersion, aToolkitVersion) {
return true;
},
getAddonBlocklistState: function(aAddon, aAppVersion, aToolkitVersion) {
return Components.interfaces.nsIBlocklistService.STATE_BLOCKED;
},
// There are a few callers in layout that rely on this.
getPluginBlocklistState: function(aPluginTag, aAppVersion, aToolkitVersion) {
return Services.cpmm.sendSyncMessage("Blocklist:getPluginBlocklistState", {
addonData: this.flattenObject(aPluginTag),
appVersion: aAppVersion,
toolkitVersion: aToolkitVersion
})[0];
},
getAddonBlocklistURL: function(aAddon, aAppVersion, aToolkitVersion) {
throw new Error(kMissingAPIMessage);
},
getPluginBlocklistURL: function(aPluginTag) {
throw new Error(kMissingAPIMessage);
},
getPluginInfoURL: function(aPluginTag) {
throw new Error(kMissingAPIMessage);
}
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([Blocklist]);
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