blob: 8a0f78150ecdc88d5e4a4248655c61259e41be60 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/* 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/. */
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
NetworkObserver:
"resource://devtools/shared/network-observer/NetworkObserver.sys.mjs",
});
/**
* The NetworkThrottler uses the dev tools NetworkObserver to provide api to throttle all network activity.
* This can be used to fix network conditions in browsertime pageload tests.
*
*/
// A minimal struct for onNetworkEvent handling
class NetworkEventRecord {
addRequestPostData() {}
addResponseStart() {}
addSecurityInfo() {}
addEventTimings() {}
addResponseCache() {}
addResponseContent() {}
addServerTimings() {}
addServiceWorkerTimings() {}
}
class NetworkThrottler {
#devtoolsNetworkObserver;
#throttling;
constructor() {
this.#throttling = false;
}
destroy() {
this.stop();
}
start(throttleData) {
if (this.#throttling) {
console.error("NetworkThrottler already started");
return;
}
this.#devtoolsNetworkObserver = new lazy.NetworkObserver({
ignoreChannelFunction: this.#ignoreChannelFunction,
onNetworkEvent: this.#onNetworkEvent,
});
this.#devtoolsNetworkObserver.setThrottleData(throttleData);
this.#throttling = true;
}
stop() {
if (!this.#throttling) {
return;
}
this.#devtoolsNetworkObserver.destroy();
this.#devtoolsNetworkObserver = null;
this.#throttling = false;
}
#ignoreChannelFunction = channel => {
// Ignore chrome-privileged or DevTools-initiated requests
if (
channel.loadInfo?.loadingDocument === null &&
(channel.loadInfo.loadingPrincipal ===
Services.scriptSecurityManager.getSystemPrincipal() ||
channel.loadInfo.isInDevToolsContext)
) {
return true;
}
return false;
};
#onNetworkEvent = (networkEvent, channel) => {
return new NetworkEventRecord(networkEvent, channel, this);
};
}
|