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