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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";
var EXPORTED_SYMBOLS = ["UptakeTelemetry", "Policy"];
const { XPCOMUtils } = ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs"
);
const { AppConstants } = ChromeUtils.importESModule(
"resource://gre/modules/AppConstants.sys.mjs"
);
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
ClientID: "resource://gre/modules/ClientID.sys.mjs",
});
XPCOMUtils.defineLazyGetter(lazy, "CryptoHash", () => {
return Components.Constructor(
"@mozilla.org/security/hash;1",
"nsICryptoHash",
"initWithString"
);
});
XPCOMUtils.defineLazyPreferenceGetter(
lazy,
"gSampleRate",
"services.common.uptake.sampleRate"
);
// Telemetry histogram id (see Histograms.json).
const TELEMETRY_HISTOGRAM_ID = "UPTAKE_REMOTE_CONTENT_RESULT_1";
// Telemetry events id (see Events.yaml).
const TELEMETRY_EVENTS_ID = "uptake.remotecontent.result";
/**
* A wrapper around certain low-level operations that can be substituted for testing.
*/
var Policy = {
_clientIDHash: null,
getClientID() {
return lazy.ClientID.getClientID();
},
/**
* Compute an integer in the range [0, 100) using a hash of the
* client ID.
*
* This is useful for sampling clients when trying to report
* telemetry only for a sample of clients.
*/
async getClientIDHash() {
if (this._clientIDHash === null) {
this._clientIDHash = this._doComputeClientIDHash();
}
return this._clientIDHash;
},
async _doComputeClientIDHash() {
const clientID = await this.getClientID();
let byteArr = new TextEncoder().encode(clientID);
let hash = new lazy.CryptoHash("sha256");
hash.update(byteArr, byteArr.length);
const bytes = hash.finish(false);
let rem = 0;
for (let i = 0, len = bytes.length; i < len; i++) {
rem = ((rem << 8) + (bytes[i].charCodeAt(0) & 0xff)) % 100;
}
return rem;
},
getChannel() {
return AppConstants.MOZ_UPDATE_CHANNEL;
},
};
/**
* A Telemetry helper to report uptake of remote content.
*/
class UptakeTelemetry {
/**
* Supported uptake statuses:
*
* - `UP_TO_DATE`: Local content was already up-to-date with remote content.
* - `SUCCESS`: Local content was updated successfully.
* - `BACKOFF`: Remote server asked clients to backoff.
* - `PARSE_ERROR`: Parsing server response has failed.
* - `CONTENT_ERROR`: Server response has unexpected content.
* - `PREF_DISABLED`: Update is disabled in user preferences.
* - `SIGNATURE_ERROR`: Signature verification after diff-based sync has failed.
* - `SIGNATURE_RETRY_ERROR`: Signature verification after full fetch has failed.
* - `CONFLICT_ERROR`: Some remote changes are in conflict with local changes.
* - `CORRUPTION_ERROR`: Error related to corrupted local data.
* - `SYNC_ERROR`: Synchronization of remote changes has failed.
* - `APPLY_ERROR`: Application of changes locally has failed.
* - `SERVER_ERROR`: Server failed to respond.
* - `CERTIFICATE_ERROR`: Server certificate verification has failed.
* - `DOWNLOAD_ERROR`: Data could not be fully retrieved.
* - `TIMEOUT_ERROR`: Server response has timed out.
* - `NETWORK_ERROR`: Communication with server has failed.
* - `NETWORK_OFFLINE_ERROR`: Network not available.
* - `SHUTDOWN_ERROR`: Error occuring during shutdown.
* - `UNKNOWN_ERROR`: Uncategorized error.
* - `CLEANUP_ERROR`: Clean-up of temporary files has failed.
* - `SYNC_BROKEN_ERROR`: Synchronization is broken.
* - `CUSTOM_1_ERROR`: Update source specific error #1.
* - `CUSTOM_2_ERROR`: Update source specific error #2.
* - `CUSTOM_3_ERROR`: Update source specific error #3.
* - `CUSTOM_4_ERROR`: Update source specific error #4.
* - `CUSTOM_5_ERROR`: Update source specific error #5.
*
* @type {Object}
*/
static get STATUS() {
return {
UP_TO_DATE: "up_to_date",
SUCCESS: "success",
BACKOFF: "backoff",
PARSE_ERROR: "parse_error",
CONTENT_ERROR: "content_error",
PREF_DISABLED: "pref_disabled",
SIGNATURE_ERROR: "sign_error",
SIGNATURE_RETRY_ERROR: "sign_retry_error",
CONFLICT_ERROR: "conflict_error",
CORRUPTION_ERROR: "corruption_error",
SYNC_ERROR: "sync_error",
APPLY_ERROR: "apply_error",
SERVER_ERROR: "server_error",
CERTIFICATE_ERROR: "certificate_error",
DOWNLOAD_ERROR: "download_error",
TIMEOUT_ERROR: "timeout_error",
NETWORK_ERROR: "network_error",
NETWORK_OFFLINE_ERROR: "offline_error",
SHUTDOWN_ERROR: "shutdown_error",
UNKNOWN_ERROR: "unknown_error",
CLEANUP_ERROR: "cleanup_error",
SYNC_BROKEN_ERROR: "sync_broken_error",
CUSTOM_1_ERROR: "custom_1_error",
CUSTOM_2_ERROR: "custom_2_error",
CUSTOM_3_ERROR: "custom_3_error",
CUSTOM_4_ERROR: "custom_4_error",
CUSTOM_5_ERROR: "custom_5_error",
};
}
static get Policy() {
return Policy;
}
/**
* Reports the uptake status for the specified source.
*
* @param {string} component the component reporting the uptake (eg. "normandy").
* @param {string} status the uptake status (eg. "network_error")
* @param {Object} extra extra values to report
* @param {string} extra.source the update source (eg. "recipe-42").
* @param {string} extra.trigger what triggered the polling/fetching (eg. "broadcast", "timer").
* @param {int} extra.age age of pulled data in seconds
*/
static async report(component, status, extra = {}) {
const { source } = extra;
if (!source) {
throw new Error("`source` value is mandatory.");
}
if (!Object.values(UptakeTelemetry.STATUS).includes(status)) {
throw new Error(`Unknown status '${status}'`);
}
// Report event for real-time monitoring. See Events.yaml for registration.
// Contrary to histograms, Telemetry Events are not enabled by default.
// Enable them on first call to `report()`.
if (!this._eventsEnabled) {
Services.telemetry.setEventRecordingEnabled(TELEMETRY_EVENTS_ID, true);
this._eventsEnabled = true;
}
const hash = await UptakeTelemetry.Policy.getClientIDHash();
const channel = UptakeTelemetry.Policy.getChannel();
const shouldSendEvent =
!["release", "esr"].includes(channel) || hash < lazy.gSampleRate;
if (shouldSendEvent) {
// The Event API requires `extra` values to be of type string. Force it!
const extraStr = Object.keys(extra).reduce((acc, k) => {
acc[k] = extra[k].toString();
return acc;
}, {});
Services.telemetry.recordEvent(
TELEMETRY_EVENTS_ID,
"uptake",
component,
status,
extraStr
);
}
}
}
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