114 lines
3.6 KiB
JavaScript
114 lines
3.6 KiB
JavaScript
/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cr = Components.results;
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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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Components.utils.import("resource://gre/modules/Services.jsm");
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const kMissingAPIMessage = "Unsupported blocklist call in the child process."
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/*
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* A lightweight blocklist proxy for the content process that traps plugin
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* related blocklist checks and forwards them to the parent. This interface is
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* primarily designed to insure overlays work.. it does not control plugin
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* or addon loading.
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*/
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function Blocklist() {
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this.init();
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}
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Blocklist.prototype = {
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classID: Components.ID("{e0a106ed-6ad4-47a4-b6af-2f1c8aa4712d}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
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Ci.nsIBlocklistService]),
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init: function() {
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Services.cpmm.addMessageListener("Blocklist:blocklistInvalidated", this);
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Services.obs.addObserver(this, "xpcom-shutdown", false);
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},
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uninit: function() {
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Services.cpmm.removeMessageListener("Blocklist:blocklistInvalidated", this);
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Services.obs.removeObserver(this, "xpcom-shutdown", false);
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},
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observe: function(aSubject, aTopic, aData) {
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switch (aTopic) {
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case "xpcom-shutdown":
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this.uninit();
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break;
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}
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},
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// Message manager message handlers
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receiveMessage: function(aMsg) {
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switch (aMsg.name) {
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case "Blocklist:blocklistInvalidated":
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Services.obs.notifyObservers(null, "blocklist-updated", null);
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Services.cpmm.sendAsyncMessage("Blocklist:content-blocklist-updated");
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break;
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default:
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throw new Error("Unknown blocklist message received from content: " + aMsg.name);
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}
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},
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/*
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* A helper that queries key data from a plugin or addon object
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* and generates a simple data wrapper suitable for ipc. We hand
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* these directly to the nsBlockListService in the parent which
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* doesn't query for much.. allowing us to get away with this.
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*/
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flattenObject: function(aTag) {
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// Based on debugging the nsBlocklistService, these are the props the
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// parent side will check on our objects.
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let props = ["name", "description", "filename", "version"];
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let dataWrapper = {};
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for (let prop of props) {
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dataWrapper[prop] = aTag[prop];
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}
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return dataWrapper;
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},
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// We support the addon methods here for completeness, but content currently
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// only calls getPluginBlocklistState.
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isAddonBlocklisted: function(aAddon, aAppVersion, aToolkitVersion) {
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return true;
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},
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getAddonBlocklistState: function(aAddon, aAppVersion, aToolkitVersion) {
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return Components.interfaces.nsIBlocklistService.STATE_BLOCKED;
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},
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// There are a few callers in layout that rely on this.
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getPluginBlocklistState: function(aPluginTag, aAppVersion, aToolkitVersion) {
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return Services.cpmm.sendSyncMessage("Blocklist:getPluginBlocklistState", {
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addonData: this.flattenObject(aPluginTag),
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appVersion: aAppVersion,
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toolkitVersion: aToolkitVersion
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})[0];
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},
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getAddonBlocklistURL: function(aAddon, aAppVersion, aToolkitVersion) {
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throw new Error(kMissingAPIMessage);
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},
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getPluginBlocklistURL: function(aPluginTag) {
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throw new Error(kMissingAPIMessage);
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},
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getPluginInfoURL: function(aPluginTag) {
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throw new Error(kMissingAPIMessage);
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}
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};
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory([Blocklist]);
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