зеркало из https://github.com/mozilla/gecko-dev.git
86 строки
2.8 KiB
JavaScript
86 строки
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 {Cc, Ci, Cm, Cr, components} = require("chrome");
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const ChromeUtils = require("ChromeUtils");
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const { XPCOMUtils } = require("resource://gre/modules/XPCOMUtils.jsm");
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const Services = require("Services");
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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 StackTraceCollector 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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function ChannelEventSink() {
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this.wrappedJSObject = this;
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this.collectors = new Set();
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}
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ChannelEventSink.prototype = {
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QueryInterface: ChromeUtils.generateQI([Ci.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("StackTraceCollector.onChannelRedirect threw an exception", ex);
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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 = XPCOMUtils.generateSingletonFactory(ChannelEventSink);
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ChannelEventSinkFactory.register = function() {
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const registrar = Cm.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(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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Services.catMan.addCategoryEntry(SINK_CATEGORY_NAME, SINK_CONTRACT_ID,
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SINK_CONTRACT_ID, false, true);
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};
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ChannelEventSinkFactory.unregister = function() {
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const registrar = Cm.QueryInterface(Ci.nsIComponentRegistrar);
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registrar.unregisterFactory(SINK_CLASS_ID, ChannelEventSinkFactory);
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Services.catMan.deleteCategoryEntry(SINK_CATEGORY_NAME, SINK_CONTRACT_ID,
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false);
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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).wrappedJSObject;
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};
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exports.ChannelEventSinkFactory = ChannelEventSinkFactory;
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