100 lines
2.8 KiB
JavaScript
100 lines
2.8 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 { ComponentUtils } = ChromeUtils.importESModule(
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"resource://gre/modules/ComponentUtils.sys.mjs",
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{ global: "contextual" }
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);
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/**
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* THIS is a nsIChannelEventSink implementation that monitors channel redirects and
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* informs the registered "collectors" about the old and new channels.
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*/
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const SINK_CLASS_DESCRIPTION = "NetworkMonitor Channel Event Sink";
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const SINK_CLASS_ID = Components.ID("{e89fa076-c845-48a8-8c45-2604729eba1d}");
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const SINK_CONTRACT_ID = "@mozilla.org/network/monitor/channeleventsink;1";
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const SINK_CATEGORY_NAME = "net-channel-event-sinks";
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class ChannelEventSink {
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constructor() {
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this.wrappedJSObject = this;
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this.collectors = new Set();
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}
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QueryInterface = ChromeUtils.generateQI(["nsIChannelEventSink"]);
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registerCollector(collector) {
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this.collectors.add(collector);
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}
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unregisterCollector(collector) {
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this.collectors.delete(collector);
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if (this.collectors.size == 0) {
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ChannelEventSinkFactory.unregister();
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}
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}
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// eslint-disable-next-line no-shadow
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asyncOnChannelRedirect(oldChannel, newChannel, flags, callback) {
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for (const collector of this.collectors) {
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try {
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collector.onChannelRedirect(oldChannel, newChannel, flags);
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} catch (ex) {
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console.error(
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"ChannelEventSink collector's 'onChannelRedirect' threw an exception",
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ex
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);
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}
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}
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callback.onRedirectVerifyCallback(Cr.NS_OK);
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}
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}
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const ChannelEventSinkFactory =
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ComponentUtils.generateSingletonFactory(ChannelEventSink);
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ChannelEventSinkFactory.register = function () {
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const registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
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if (registrar.isCIDRegistered(SINK_CLASS_ID)) {
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return;
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}
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registrar.registerFactory(
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SINK_CLASS_ID,
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SINK_CLASS_DESCRIPTION,
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SINK_CONTRACT_ID,
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ChannelEventSinkFactory
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);
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Services.catMan.addCategoryEntry(
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SINK_CATEGORY_NAME,
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SINK_CONTRACT_ID,
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SINK_CONTRACT_ID,
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false,
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true
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);
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};
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ChannelEventSinkFactory.unregister = function () {
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const registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
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registrar.unregisterFactory(SINK_CLASS_ID, ChannelEventSinkFactory);
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Services.catMan.deleteCategoryEntry(
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SINK_CATEGORY_NAME,
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SINK_CONTRACT_ID,
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false
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);
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};
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ChannelEventSinkFactory.getService = function () {
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// Make sure the ChannelEventSink service is registered before accessing it
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ChannelEventSinkFactory.register();
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return Cc[SINK_CONTRACT_ID].getService(Ci.nsIChannelEventSink)
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.wrappedJSObject;
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};
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exports.ChannelEventSinkFactory = ChannelEventSinkFactory;
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