Revision 97cedc8f64ab9fb9c83ed5197ab4cd49081ac184 authored by B2G Bumper Bot on 10 April 2014, 04:07:35 UTC, committed by B2G Bumper Bot on 10 April 2014, 04:07:35 UTC
1 parent 5d2ae29
healthreporter.jsm
/* 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";
#ifndef MERGED_COMPARTMENT
this.EXPORTED_SYMBOLS = ["HealthReporter"];
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
const MILLISECONDS_PER_DAY = 24 * 60 * 60 * 1000;
Cu.import("resource://gre/modules/Metrics.jsm");
Cu.import("resource://services-common/async.js");
Cu.import("resource://services-common/bagheeraclient.js");
#endif
Cu.import("resource://gre/modules/Log.jsm");
Cu.import("resource://services-common/utils.js");
Cu.import("resource://gre/modules/Promise.jsm");
Cu.import("resource://gre/modules/osfile.jsm");
Cu.import("resource://gre/modules/Preferences.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/Task.jsm");
Cu.import("resource://gre/modules/TelemetryStopwatch.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "UpdateChannel",
"resource://gre/modules/UpdateChannel.jsm");
// Oldest year to allow in date preferences. This module was implemented in
// 2012 and no dates older than that should be encountered.
const OLDEST_ALLOWED_YEAR = 2012;
const DAYS_IN_PAYLOAD = 180;
const DEFAULT_DATABASE_NAME = "healthreport.sqlite";
const TELEMETRY_INIT = "HEALTHREPORT_INIT_MS";
const TELEMETRY_INIT_FIRSTRUN = "HEALTHREPORT_INIT_FIRSTRUN_MS";
const TELEMETRY_DB_OPEN = "HEALTHREPORT_DB_OPEN_MS";
const TELEMETRY_DB_OPEN_FIRSTRUN = "HEALTHREPORT_DB_OPEN_FIRSTRUN_MS";
const TELEMETRY_GENERATE_PAYLOAD = "HEALTHREPORT_GENERATE_JSON_PAYLOAD_MS";
const TELEMETRY_JSON_PAYLOAD_SERIALIZE = "HEALTHREPORT_JSON_PAYLOAD_SERIALIZE_MS";
const TELEMETRY_PAYLOAD_SIZE_UNCOMPRESSED = "HEALTHREPORT_PAYLOAD_UNCOMPRESSED_BYTES";
const TELEMETRY_PAYLOAD_SIZE_COMPRESSED = "HEALTHREPORT_PAYLOAD_COMPRESSED_BYTES";
const TELEMETRY_UPLOAD = "HEALTHREPORT_UPLOAD_MS";
const TELEMETRY_SHUTDOWN_DELAY = "HEALTHREPORT_SHUTDOWN_DELAY_MS";
const TELEMETRY_COLLECT_CONSTANT = "HEALTHREPORT_COLLECT_CONSTANT_DATA_MS";
const TELEMETRY_COLLECT_DAILY = "HEALTHREPORT_COLLECT_DAILY_MS";
const TELEMETRY_SHUTDOWN = "HEALTHREPORT_SHUTDOWN_MS";
const TELEMETRY_COLLECT_CHECKPOINT = "HEALTHREPORT_POST_COLLECT_CHECKPOINT_MS";
/**
* Helper type to assist with management of Health Reporter state.
*
* Instances are not meant to be created outside of a HealthReporter instance.
*
* Please note that remote IDs are treated as a queue. When a new remote ID is
* added, it goes at the back of the queue. When we look for the current ID, we
* pop the ID at the front of the queue. This helps ensure that all IDs on the
* server are eventually deleted. This should eventually become irrelevant once
* the server supports multiple ID deletion.
*/
function HealthReporterState(reporter) {
this._reporter = reporter;
let profD = OS.Constants.Path.profileDir;
if (!profD || !profD.length) {
throw new Error("Could not obtain profile directory. OS.File not " +
"initialized properly?");
}
this._log = reporter._log;
this._stateDir = OS.Path.join(profD, "healthreport");
// To facilitate testing.
let leaf = reporter._stateLeaf || "state.json";
this._filename = OS.Path.join(this._stateDir, leaf);
this._log.debug("Storing state in " + this._filename);
this._s = null;
}
HealthReporterState.prototype = Object.freeze({
get lastPingDate() {
return new Date(this._s.lastPingTime);
},
get lastSubmitID() {
return this._s.remoteIDs[0];
},
get remoteIDs() {
return this._s.remoteIDs;
},
get _lastPayloadPath() {
return OS.Path.join(this._stateDir, "lastpayload.json");
},
init: function () {
return Task.spawn(function init() {
try {
OS.File.makeDir(this._stateDir);
} catch (ex if ex instanceof OS.FileError) {
if (!ex.becauseExists) {
throw ex;
}
}
let resetObjectState = function () {
this._s = {
v: 1,
remoteIDs: [],
lastPingTime: 0,
removedOutdatedLastpayload: false,
};
}.bind(this);
try {
this._s = yield CommonUtils.readJSON(this._filename);
} catch (ex if ex instanceof OS.File.Error) {
if (!ex.becauseNoSuchFile) {
throw ex;
}
this._log.warn("Saved state file does not exist.");
resetObjectState();
} catch (ex) {
this._log.error("Exception when reading state from disk: " +
CommonUtils.exceptionStr(ex));
resetObjectState();
// Don't save in case it goes away on next run.
}
if (typeof(this._s) != "object") {
this._log.warn("Read state is not an object. Resetting state.");
resetObjectState();
yield this.save();
}
if (this._s.v != 1) {
this._log.warn("Unknown version in state file: " + this._s.v);
resetObjectState();
// We explicitly don't save here in the hopes an application re-upgrade
// comes along and fixes us.
}
// Always look for preferences. This ensures that downgrades followed
// by reupgrades don't result in excessive data loss.
for (let promise of this._migratePrefs()) {
yield promise;
}
}.bind(this));
},
save: function () {
this._log.info("Writing state file: " + this._filename);
return CommonUtils.writeJSON(this._s, this._filename);
},
addRemoteID: function (id) {
this._log.warn("Recording new remote ID: " + id);
this._s.remoteIDs.push(id);
return this.save();
},
removeRemoteID: function (id) {
return this.removeRemoteIDs(id ? [id] : []);
},
removeRemoteIDs: function (ids) {
if (!ids || !ids.length) {
this._log.warn("No IDs passed for removal.");
return Promise.resolve();
}
this._log.warn("Removing documents from remote ID list: " + ids);
let filtered = this._s.remoteIDs.filter((x) => ids.indexOf(x) === -1);
if (filtered.length == this._s.remoteIDs.length) {
return Promise.resolve();
}
this._s.remoteIDs = filtered;
return this.save();
},
setLastPingDate: function (date) {
this._s.lastPingTime = date.getTime();
return this.save();
},
updateLastPingAndRemoveRemoteID: function (date, id) {
return this.updateLastPingAndRemoveRemoteIDs(date, id ? [id] : []);
},
updateLastPingAndRemoveRemoteIDs: function (date, ids) {
if (!ids) {
return this.setLastPingDate(date);
}
this._log.info("Recording last ping time and deleted remote document.");
this._s.lastPingTime = date.getTime();
return this.removeRemoteIDs(ids);
},
_migratePrefs: function () {
let prefs = this._reporter._prefs;
let lastID = prefs.get("lastSubmitID", null);
let lastPingDate = CommonUtils.getDatePref(prefs, "lastPingTime",
0, this._log, OLDEST_ALLOWED_YEAR);
// If we have state from prefs, migrate and save it to a file then clear
// out old prefs.
if (lastID || (lastPingDate && lastPingDate.getTime() > 0)) {
this._log.warn("Migrating saved state from preferences.");
if (lastID) {
this._log.info("Migrating last saved ID: " + lastID);
this._s.remoteIDs.push(lastID);
}
let ourLast = this.lastPingDate;
if (lastPingDate && lastPingDate.getTime() > ourLast.getTime()) {
this._log.info("Migrating last ping time: " + lastPingDate);
this._s.lastPingTime = lastPingDate.getTime();
}
yield this.save();
prefs.reset(["lastSubmitID", "lastPingTime"]);
} else {
this._log.warn("No prefs data found.");
}
},
});
/**
* This is the abstract base class of `HealthReporter`. It exists so that
* we can sanely divide work on platforms where control of Firefox Health
* Report is outside of Gecko (e.g., Android).
*/
function AbstractHealthReporter(branch, policy, sessionRecorder) {
if (!branch.endsWith(".")) {
throw new Error("Branch must end with a period (.): " + branch);
}
if (!policy) {
throw new Error("Must provide policy to HealthReporter constructor.");
}
this._log = Log.repository.getLogger("Services.HealthReport.HealthReporter");
this._log.info("Initializing health reporter instance against " + branch);
this._branch = branch;
this._prefs = new Preferences(branch);
this._policy = policy;
this.sessionRecorder = sessionRecorder;
this._dbName = this._prefs.get("dbName") || DEFAULT_DATABASE_NAME;
this._storage = null;
this._storageInProgress = false;
this._providerManager = null;
this._providerManagerInProgress = false;
this._initializeStarted = false;
this._initialized = false;
this._initializeHadError = false;
this._initializedDeferred = Promise.defer();
this._shutdownRequested = false;
this._shutdownInitiated = false;
this._shutdownComplete = false;
this._shutdownCompleteCallback = null;
this._errors = [];
this._lastDailyDate = null;
// Yes, this will probably run concurrently with remaining constructor work.
let hasFirstRun = this._prefs.get("service.firstRun", false);
this._initHistogram = hasFirstRun ? TELEMETRY_INIT : TELEMETRY_INIT_FIRSTRUN;
this._dbOpenHistogram = hasFirstRun ? TELEMETRY_DB_OPEN : TELEMETRY_DB_OPEN_FIRSTRUN;
}
AbstractHealthReporter.prototype = Object.freeze({
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
/**
* Whether the service is fully initialized and running.
*
* If this is false, it is not safe to call most functions.
*/
get initialized() {
return this._initialized;
},
/**
* Initialize the instance.
*
* This must be called once after object construction or the instance is
* useless.
*/
init: function () {
if (this._initializeStarted) {
throw new Error("We have already started initialization.");
}
this._initializeStarted = true;
TelemetryStopwatch.start(this._initHistogram, this);
this._initializeState().then(this._onStateInitialized.bind(this),
this._onInitError.bind(this));
return this.onInit();
},
//----------------------------------------------------
// SERVICE CONTROL FUNCTIONS
//
// You shouldn't need to call any of these externally.
//----------------------------------------------------
_onInitError: function (error) {
TelemetryStopwatch.cancel(this._initHistogram, this);
TelemetryStopwatch.cancel(this._dbOpenHistogram, this);
delete this._initHistogram;
delete this._dbOpenHistogram;
this._recordError("Error during initialization", error);
this._initializeHadError = true;
this._initiateShutdown();
this._initializedDeferred.reject(error);
// FUTURE consider poisoning prototype's functions so calls fail with a
// useful error message.
},
_initializeState: function () {
return Promise.resolve();
},
_onStateInitialized: function () {
return Task.spawn(function onStateInitialized () {
try {
if (!this._state._s.removedOutdatedLastpayload) {
yield this._deleteOldLastPayload();
this._state._s.removedOutdatedLastpayload = true;
// Normally we should save this to a file but it directly conflicts with
// the "application re-upgrade" decision in HealthReporterState::init()
// which specifically does not save the state to a file.
}
} catch (ex) {
this._log.error("Error deleting last payload: " +
CommonUtils.exceptionStr(ex));
}
// As soon as we have could storage, we need to register cleanup or
// else bad things happen on shutdown.
Services.obs.addObserver(this, "quit-application", false);
Services.obs.addObserver(this, "profile-before-change", false);
this._storageInProgress = true;
TelemetryStopwatch.start(this._dbOpenHistogram, this);
Metrics.Storage(this._dbName).then(this._onStorageCreated.bind(this),
this._onInitError.bind(this));
}.bind(this));
},
/**
* Removes the outdated lastpaylaod.json and lastpayload.json.tmp files
* @see Bug #867902
* @return a promise for when all the files have been deleted
*/
_deleteOldLastPayload: function () {
let paths = [this._state._lastPayloadPath, this._state._lastPayloadPath + ".tmp"];
return Task.spawn(function removeAllFiles () {
for (let path of paths) {
try {
OS.File.remove(path);
} catch (ex) {
if (!ex.becauseNoSuchFile) {
this._log.error("Exception when removing outdated payload files: " +
CommonUtils.exceptionStr(ex));
}
}
}
}.bind(this));
},
// Called when storage has been opened.
_onStorageCreated: function (storage) {
TelemetryStopwatch.finish(this._dbOpenHistogram, this);
delete this._dbOpenHistogram;
this._log.info("Storage initialized.");
this._storage = storage;
this._storageInProgress = false;
if (this._shutdownRequested) {
this._initiateShutdown();
return;
}
Task.spawn(this._initializeProviderManager.bind(this))
.then(this._onProviderManagerInitialized.bind(this),
this._onInitError.bind(this));
},
_initializeProviderManager: function () {
if (this._collector) {
throw new Error("Provider manager has already been initialized.");
}
this._log.info("Initializing provider manager.");
this._providerManager = new Metrics.ProviderManager(this._storage);
this._providerManager.onProviderError = this._recordError.bind(this);
this._providerManager.onProviderInit = this._initProvider.bind(this);
this._providerManagerInProgress = true;
let catString = this._prefs.get("service.providerCategories") || "";
if (catString.length) {
for (let category of catString.split(",")) {
yield this._providerManager.registerProvidersFromCategoryManager(category);
}
}
},
_onProviderManagerInitialized: function () {
TelemetryStopwatch.finish(this._initHistogram, this);
delete this._initHistogram;
this._log.debug("Provider manager initialized.");
this._providerManagerInProgress = false;
if (this._shutdownRequested) {
this._initiateShutdown();
return;
}
this._log.info("HealthReporter started.");
this._initialized = true;
Services.obs.addObserver(this, "idle-daily", false);
// If upload is not enabled, ensure daily collection works. If upload
// is enabled, this will be performed as part of upload.
//
// This is important because it ensures about:healthreport contains
// longitudinal data even if upload is disabled. Having about:healthreport
// provide useful info even if upload is disabled was a core launch
// requirement.
//
// We do not catch changes to the backing pref. So, if the session lasts
// many days, we may fail to collect. However, most sessions are short and
// this code will likely be refactored as part of splitting up policy to
// serve Android. So, meh.
if (!this._policy.healthReportUploadEnabled) {
this._log.info("Upload not enabled. Scheduling daily collection.");
// Since the timer manager is a singleton and there could be multiple
// HealthReporter instances, we need to encode a unique identifier in
// the timer ID.
try {
let timerName = this._branch.replace(".", "-", "g") + "lastDailyCollection";
let tm = Cc["@mozilla.org/updates/timer-manager;1"]
.getService(Ci.nsIUpdateTimerManager);
tm.registerTimer(timerName, this.collectMeasurements.bind(this),
24 * 60 * 60);
} catch (ex) {
this._log.error("Error registering collection timer: " +
CommonUtils.exceptionStr(ex));
}
}
// Clean up caches and reduce memory usage.
this._storage.compact();
this._initializedDeferred.resolve(this);
},
// nsIObserver to handle shutdown.
observe: function (subject, topic, data) {
switch (topic) {
case "quit-application":
Services.obs.removeObserver(this, "quit-application");
this._initiateShutdown();
break;
case "profile-before-change":
Services.obs.removeObserver(this, "profile-before-change");
this._waitForShutdown();
break;
case "idle-daily":
this._performDailyMaintenance();
break;
}
},
_initiateShutdown: function () {
// Ensure we only begin the main shutdown sequence once.
if (this._shutdownInitiated) {
this._log.warn("Shutdown has already been initiated. No-op.");
return;
}
this._log.info("Request to shut down.");
this._initialized = false;
this._shutdownRequested = true;
if (this._initializeHadError) {
this._log.warn("Initialization had error. Shutting down immediately.");
} else {
if (this._providerManagerInProcess) {
this._log.warn("Provider manager is in progress of initializing. " +
"Waiting to finish.");
return;
}
// If storage is in the process of initializing, we need to wait for it
// to finish before continuing. The initialization process will call us
// again once storage has initialized.
if (this._storageInProgress) {
this._log.warn("Storage is in progress of initializing. Waiting to finish.");
return;
}
}
this._log.warn("Initiating main shutdown procedure.");
// Everything from here must only be performed once or else race conditions
// could occur.
TelemetryStopwatch.start(TELEMETRY_SHUTDOWN, this);
this._shutdownInitiated = true;
// We may not have registered the observer yet. If not, this will
// throw.
try {
Services.obs.removeObserver(this, "idle-daily");
} catch (ex) { }
if (this._providerManager) {
let onShutdown = this._onProviderManagerShutdown.bind(this);
Task.spawn(this._shutdownProviderManager.bind(this))
.then(onShutdown, onShutdown);
return;
}
this._log.warn("Don't have provider manager. Proceeding to storage shutdown.");
this._shutdownStorage();
},
_shutdownProviderManager: function () {
this._log.info("Shutting down provider manager.");
for (let provider of this._providerManager.providers) {
try {
yield provider.shutdown();
} catch (ex) {
this._log.warn("Error when shutting down provider: " +
CommonUtils.exceptionStr(ex));
}
}
},
_onProviderManagerShutdown: function () {
this._log.info("Provider manager shut down.");
this._providerManager = null;
this._shutdownStorage();
},
_shutdownStorage: function () {
if (!this._storage) {
this._onShutdownComplete();
}
this._log.info("Shutting down storage.");
let onClose = this._onStorageClose.bind(this);
this._storage.close().then(onClose, onClose);
},
_onStorageClose: function (error) {
this._log.info("Storage has been closed.");
if (error) {
this._log.warn("Error when closing storage: " +
CommonUtils.exceptionStr(error));
}
this._storage = null;
this._onShutdownComplete();
},
_onShutdownComplete: function () {
this._log.warn("Shutdown complete.");
this._shutdownComplete = true;
TelemetryStopwatch.finish(TELEMETRY_SHUTDOWN, this);
if (this._shutdownCompleteCallback) {
this._shutdownCompleteCallback();
}
},
_waitForShutdown: function () {
if (this._shutdownComplete) {
return;
}
TelemetryStopwatch.start(TELEMETRY_SHUTDOWN_DELAY, this);
try {
this._shutdownCompleteCallback = Async.makeSpinningCallback();
this._shutdownCompleteCallback.wait();
this._shutdownCompleteCallback = null;
} finally {
TelemetryStopwatch.finish(TELEMETRY_SHUTDOWN_DELAY, this);
}
},
/**
* Convenience method to shut down the instance.
*
* This should *not* be called outside of tests.
*/
_shutdown: function () {
this._initiateShutdown();
this._waitForShutdown();
},
/**
* Return a promise that is resolved once the service has been initialized.
*/
onInit: function () {
if (this._initializeHadError) {
throw new Error("Service failed to initialize.");
}
if (this._initialized) {
return CommonUtils.laterTickResolvingPromise(this);
}
return this._initializedDeferred.promise;
},
_performDailyMaintenance: function () {
this._log.info("Request to perform daily maintenance.");
if (!this._initialized) {
return;
}
let now = new Date();
let cutoff = new Date(now.getTime() - MILLISECONDS_PER_DAY * (DAYS_IN_PAYLOAD - 1));
// The operation is enqueued and put in a transaction by the storage module.
this._storage.pruneDataBefore(cutoff);
},
//--------------------
// Provider Management
//--------------------
/**
* Obtain a provider from its name.
*
* This will only return providers that are currently initialized. If
* a provider is lazy initialized (like pull-only providers) this
* will likely not return anything.
*/
getProvider: function (name) {
if (!this._providerManager) {
return null;
}
return this._providerManager.getProvider(name);
},
_initProvider: function (provider) {
provider.healthReporter = this;
},
/**
* Record an exception for reporting in the payload.
*
* A side effect is the exception is logged.
*
* Note that callers need to be extra sensitive about ensuring personal
* or otherwise private details do not leak into this. All of the user data
* on the stack in FHR code should be limited to data we were collecting with
* the intent to submit. So, it is covered under the user's consent to use
* the feature.
*
* @param message
* (string) Human readable message describing error.
* @param ex
* (Error) The error that should be captured.
*/
_recordError: function (message, ex) {
let recordMessage = message;
let logMessage = message;
if (ex) {
recordMessage += ": " + CommonUtils.exceptionStr(ex);
logMessage += ": " + CommonUtils.exceptionStr(ex);
}
// Scrub out potentially identifying information from strings that could
// make the payload.
let appData = Services.dirsvc.get("UAppData", Ci.nsIFile);
let profile = Services.dirsvc.get("ProfD", Ci.nsIFile);
let appDataURI = Services.io.newFileURI(appData);
let profileURI = Services.io.newFileURI(profile);
// Order of operation is important here. We do the URI before the path version
// because the path may be a subset of the URI. We also have to check for the case
// where UAppData is underneath the profile directory (or vice-versa) so we
// don't substitute incomplete strings.
function replace(uri, path, thing) {
// Try is because .spec can throw on invalid URI.
try {
recordMessage = recordMessage.replace(uri.spec, '<' + thing + 'URI>', 'g');
} catch (ex) { }
recordMessage = recordMessage.replace(path, '<' + thing + 'Path>', 'g');
}
if (appData.path.contains(profile.path)) {
replace(appDataURI, appData.path, 'AppData');
replace(profileURI, profile.path, 'Profile');
} else {
replace(profileURI, profile.path, 'Profile');
replace(appDataURI, appData.path, 'AppData');
}
this._log.warn(logMessage);
this._errors.push(recordMessage);
},
/**
* Collect all measurements for all registered providers.
*/
collectMeasurements: function () {
if (!this._initialized) {
return Promise.reject(new Error("Not initialized."));
}
return Task.spawn(function doCollection() {
yield this._providerManager.ensurePullOnlyProvidersRegistered();
try {
TelemetryStopwatch.start(TELEMETRY_COLLECT_CONSTANT, this);
yield this._providerManager.collectConstantData();
TelemetryStopwatch.finish(TELEMETRY_COLLECT_CONSTANT, this);
} catch (ex) {
TelemetryStopwatch.cancel(TELEMETRY_COLLECT_CONSTANT, this);
this._log.warn("Error collecting constant data: " +
CommonUtils.exceptionStr(ex));
}
// Daily data is collected if it hasn't yet been collected this
// application session or if it has been more than a day since the
// last collection. This means that providers could see many calls to
// collectDailyData per calendar day. However, this collection API
// makes no guarantees about limits. The alternative would involve
// recording state. The simpler implementation prevails for now.
if (!this._lastDailyDate ||
Date.now() - this._lastDailyDate > MILLISECONDS_PER_DAY) {
try {
TelemetryStopwatch.start(TELEMETRY_COLLECT_DAILY, this);
this._lastDailyDate = new Date();
yield this._providerManager.collectDailyData();
TelemetryStopwatch.finish(TELEMETRY_COLLECT_DAILY, this);
} catch (ex) {
TelemetryStopwatch.cancel(TELEMETRY_COLLECT_DAILY, this);
this._log.warn("Error collecting daily data from providers: " +
CommonUtils.exceptionStr(ex));
}
}
yield this._providerManager.ensurePullOnlyProvidersUnregistered();
// Flush gathered data to disk. This will incur an fsync. But, if
// there is ever a time we want to persist data to disk, it's
// after a massive collection.
try {
TelemetryStopwatch.start(TELEMETRY_COLLECT_CHECKPOINT, this);
yield this._storage.checkpoint();
TelemetryStopwatch.finish(TELEMETRY_COLLECT_CHECKPOINT, this);
} catch (ex) {
TelemetryStopwatch.cancel(TELEMETRY_COLLECT_CHECKPOINT, this);
throw ex;
}
throw new Task.Result();
}.bind(this));
},
/**
* Helper function to perform data collection and obtain the JSON payload.
*
* If you are looking for an up-to-date snapshot of FHR data that pulls in
* new data since the last upload, this is how you should obtain it.
*
* @param asObject
* (bool) Whether to resolve an object or JSON-encoded string of that
* object (the default).
*
* @return Promise<Object | string>
*/
collectAndObtainJSONPayload: function (asObject=false) {
if (!this._initialized) {
return Promise.reject(new Error("Not initialized."));
}
return Task.spawn(function collectAndObtain() {
yield this._storage.setAutoCheckpoint(0);
yield this._providerManager.ensurePullOnlyProvidersRegistered();
let payload;
let error;
try {
yield this.collectMeasurements();
payload = yield this.getJSONPayload(asObject);
} catch (ex) {
error = ex;
this._collectException("Error collecting and/or retrieving JSON payload",
ex);
} finally {
yield this._providerManager.ensurePullOnlyProvidersUnregistered();
yield this._storage.setAutoCheckpoint(1);
if (error) {
throw error;
}
}
// We hold off throwing to ensure that behavior between finally
// and generators and throwing is sane.
throw new Task.Result(payload);
}.bind(this));
},
/**
* Obtain the JSON payload for currently-collected data.
*
* The payload only contains data that has been recorded to FHR. Some
* providers may have newer data available. If you want to ensure you
* have all available data, call `collectAndObtainJSONPayload`
* instead.
*
* @param asObject
* (bool) Whether to return an object or JSON encoding of that
* object (the default).
*
* @return Promise<string|object>
*/
getJSONPayload: function (asObject=false) {
TelemetryStopwatch.start(TELEMETRY_GENERATE_PAYLOAD, this);
let deferred = Promise.defer();
Task.spawn(this._getJSONPayload.bind(this, this._now(), asObject)).then(
function onResult(result) {
TelemetryStopwatch.finish(TELEMETRY_GENERATE_PAYLOAD, this);
deferred.resolve(result);
}.bind(this),
function onError(error) {
TelemetryStopwatch.cancel(TELEMETRY_GENERATE_PAYLOAD, this);
deferred.reject(error);
}.bind(this)
);
return deferred.promise;
},
_getJSONPayload: function (now, asObject=false) {
let pingDateString = this._formatDate(now);
this._log.info("Producing JSON payload for " + pingDateString);
// May not be present if we are generating as a result of init error.
if (this._providerManager) {
yield this._providerManager.ensurePullOnlyProvidersRegistered();
}
let o = {
version: 2,
thisPingDate: pingDateString,
geckoAppInfo: this.obtainAppInfo(this._log),
data: {last: {}, days: {}},
};
let outputDataDays = o.data.days;
// Guard here in case we don't track this (e.g., on Android).
let lastPingDate = this.lastPingDate;
if (lastPingDate && lastPingDate.getTime() > 0) {
o.lastPingDate = this._formatDate(lastPingDate);
}
// We can still generate a payload even if we're not initialized.
// This is to facilitate error upload on init failure.
if (this._initialized) {
for (let provider of this._providerManager.providers) {
let providerName = provider.name;
let providerEntry = {
measurements: {},
};
// Measurement name to recorded version.
let lastVersions = {};
// Day string to mapping of measurement name to recorded version.
let dayVersions = {};
for (let [measurementKey, measurement] of provider.measurements) {
let name = providerName + "." + measurement.name;
let version = measurement.version;
let serializer;
try {
// The measurement is responsible for returning a serializer which
// is aware of the measurement version.
serializer = measurement.serializer(measurement.SERIALIZE_JSON);
} catch (ex) {
this._recordError("Error obtaining serializer for measurement: " +
name, ex);
continue;
}
let data;
try {
data = yield measurement.getValues();
} catch (ex) {
this._recordError("Error obtaining data for measurement: " + name,
ex);
continue;
}
if (data.singular.size) {
try {
let serialized = serializer.singular(data.singular);
if (serialized) {
// Only replace the existing data if there is no data or if our
// version is newer than the old one.
if (!(name in o.data.last) || version > lastVersions[name]) {
o.data.last[name] = serialized;
lastVersions[name] = version;
}
}
} catch (ex) {
this._recordError("Error serializing singular data: " + name,
ex);
continue;
}
}
let dataDays = data.days;
for (let i = 0; i < DAYS_IN_PAYLOAD; i++) {
let date = new Date(now.getTime() - i * MILLISECONDS_PER_DAY);
if (!dataDays.hasDay(date)) {
continue;
}
let dateFormatted = this._formatDate(date);
try {
let serialized = serializer.daily(dataDays.getDay(date));
if (!serialized) {
continue;
}
if (!(dateFormatted in outputDataDays)) {
outputDataDays[dateFormatted] = {};
}
// This needs to be separate because dayVersions is provider
// specific and gets blown away in a loop while outputDataDays
// is persistent.
if (!(dateFormatted in dayVersions)) {
dayVersions[dateFormatted] = {};
}
if (!(name in outputDataDays[dateFormatted]) ||
version > dayVersions[dateFormatted][name]) {
outputDataDays[dateFormatted][name] = serialized;
dayVersions[dateFormatted][name] = version;
}
} catch (ex) {
this._recordError("Error populating data for day: " + name, ex);
continue;
}
}
}
}
} else {
o.notInitialized = 1;
this._log.warn("Not initialized. Sending report with only error info.");
}
if (this._errors.length) {
o.errors = this._errors.slice(0, 20);
}
if (this._initialized) {
this._storage.compact();
}
if (!asObject) {
TelemetryStopwatch.start(TELEMETRY_JSON_PAYLOAD_SERIALIZE, this);
o = JSON.stringify(o);
TelemetryStopwatch.finish(TELEMETRY_JSON_PAYLOAD_SERIALIZE, this);
}
if (this._providerManager) {
yield this._providerManager.ensurePullOnlyProvidersUnregistered();
}
throw new Task.Result(o);
},
_now: function _now() {
return new Date();
},
// These are stolen from AppInfoProvider.
appInfoVersion: 1,
appInfoFields: {
// From nsIXULAppInfo.
vendor: "vendor",
name: "name",
id: "ID",
version: "version",
appBuildID: "appBuildID",
platformVersion: "platformVersion",
platformBuildID: "platformBuildID",
// From nsIXULRuntime.
os: "OS",
xpcomabi: "XPCOMABI",
},
/**
* Statically return a bundle of app info data, a subset of that produced by
* AppInfoProvider._populateConstants. This allows us to more usefully handle
* payloads that, due to error, contain no data.
*
* Returns a very sparse object if Services.appinfo is unavailable.
*/
obtainAppInfo: function () {
let out = {"_v": this.appInfoVersion};
try {
let ai = Services.appinfo;
for (let [k, v] in Iterator(this.appInfoFields)) {
out[k] = ai[v];
}
} catch (ex) {
this._log.warn("Could not obtain Services.appinfo: " +
CommonUtils.exceptionStr(ex));
}
try {
out["updateChannel"] = UpdateChannel.get();
} catch (ex) {
this._log.warn("Could not obtain update channel: " +
CommonUtils.exceptionStr(ex));
}
return out;
},
});
/**
* HealthReporter and its abstract superclass coordinate collection and
* submission of health report metrics.
*
* This is the main type for Firefox Health Report on desktop. It glues all the
* lower-level components (such as collection and submission) together.
*
* An instance of this type is created as an XPCOM service. See
* DataReportingService.js and
* DataReporting.manifest/HealthReportComponents.manifest.
*
* It is theoretically possible to have multiple instances of this running
* in the application. For example, this type may one day handle submission
* of telemetry data as well. However, there is some moderate coupling between
* this type and *the* Firefox Health Report (e.g., the policy). This could
* be abstracted if needed.
*
* Note that `AbstractHealthReporter` exists to allow for Firefox Health Report
* to be more easily implemented on platforms where a separate controlling
* layer is responsible for payload upload and deletion.
*
* IMPLEMENTATION NOTES
* ====================
*
* These notes apply to the combination of `HealthReporter` and
* `AbstractHealthReporter`.
*
* Initialization and shutdown are somewhat complicated and worth explaining
* in extra detail.
*
* The complexity is driven by the requirements of SQLite connection management.
* Once you have a SQLite connection, it isn't enough to just let the
* application shut down. If there is an open connection or if there are
* outstanding SQL statements come XPCOM shutdown time, Storage will assert.
* On debug builds you will crash. On release builds you will get a shutdown
* hang. This must be avoided!
*
* During initialization, the second we create a SQLite connection (via
* Metrics.Storage) we register observers for application shutdown. The
* "quit-application" notification initiates our shutdown procedure. The
* subsequent "profile-do-change" notification ensures it has completed.
*
* The handler for "profile-do-change" may result in event loop spinning. This
* is because of race conditions between our shutdown code and application
* shutdown.
*
* All of our shutdown routines are async. There is the potential that these
* async functions will not complete before XPCOM shutdown. If they don't
* finish in time, we could get assertions in Storage. Our solution is to
* initiate storage early in the shutdown cycle ("quit-application").
* Hopefully all the async operations have completed by the time we reach
* "profile-do-change." If so, great. If not, we spin the event loop until
* they have completed, avoiding potential race conditions.
*
* @param branch
* (string) The preferences branch to use for state storage. The value
* must end with a period (.).
*
* @param policy
* (HealthReportPolicy) Policy driving execution of HealthReporter.
*/
this.HealthReporter = function (branch, policy, sessionRecorder, stateLeaf=null) {
this._stateLeaf = stateLeaf;
this._uploadInProgress = false;
AbstractHealthReporter.call(this, branch, policy, sessionRecorder);
if (!this.serverURI) {
throw new Error("No server URI defined. Did you forget to define the pref?");
}
if (!this.serverNamespace) {
throw new Error("No server namespace defined. Did you forget a pref?");
}
this._state = new HealthReporterState(this);
}
this.HealthReporter.prototype = Object.freeze({
__proto__: AbstractHealthReporter.prototype,
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
get lastSubmitID() {
return this._state.lastSubmitID;
},
/**
* When we last successfully submitted data to the server.
*
* This is sent as part of the upload. This is redundant with similar data
* in the policy because we like the modules to be loosely coupled and the
* similar data in the policy is only used for forensic purposes.
*/
get lastPingDate() {
return this._state.lastPingDate;
},
/**
* The base URI of the document server to which to submit data.
*
* This is typically a Bagheera server instance. It is the URI up to but not
* including the version prefix. e.g. https://data.metrics.mozilla.com/
*/
get serverURI() {
return this._prefs.get("documentServerURI", null);
},
set serverURI(value) {
if (!value) {
throw new Error("serverURI must have a value.");
}
if (typeof(value) != "string") {
throw new Error("serverURI must be a string: " + value);
}
this._prefs.set("documentServerURI", value);
},
/**
* The namespace on the document server to which we will be submitting data.
*/
get serverNamespace() {
return this._prefs.get("documentServerNamespace", "metrics");
},
set serverNamespace(value) {
if (!value) {
throw new Error("serverNamespace must have a value.");
}
if (typeof(value) != "string") {
throw new Error("serverNamespace must be a string: " + value);
}
this._prefs.set("documentServerNamespace", value);
},
/**
* Whether this instance will upload data to a server.
*/
get willUploadData() {
return this._policy.dataSubmissionPolicyAccepted &&
this._policy.healthReportUploadEnabled;
},
/**
* Whether remote data is currently stored.
*
* @return bool
*/
haveRemoteData: function () {
return !!this._state.lastSubmitID;
},
/**
* Called to initiate a data upload.
*
* The passed argument is a `DataSubmissionRequest` from policy.jsm.
*/
requestDataUpload: function (request) {
if (!this._initialized) {
return Promise.reject(new Error("Not initialized."));
}
return Task.spawn(function doUpload() {
yield this._providerManager.ensurePullOnlyProvidersRegistered();
try {
yield this.collectMeasurements();
try {
yield this._uploadData(request);
} catch (ex) {
this._onSubmitDataRequestFailure(ex);
}
} finally {
yield this._providerManager.ensurePullOnlyProvidersUnregistered();
}
}.bind(this));
},
/**
* Request that server data be deleted.
*
* If deletion is scheduled to occur immediately, a promise will be returned
* that will be fulfilled when the deletion attempt finishes. Otherwise,
* callers should poll haveRemoteData() to determine when remote data is
* deleted.
*/
requestDeleteRemoteData: function (reason) {
if (!this.haveRemoteData()) {
return;
}
return this._policy.deleteRemoteData(reason);
},
_initializeState: function() {
return this._state.init();
},
/**
* Override default handler to incur an upload describing the error.
*/
_onInitError: function (error) {
// Need to capture this before we call the parent else it's always
// set.
let inShutdown = this._shutdownRequested;
let result;
try {
result = AbstractHealthReporter.prototype._onInitError.call(this, error);
} catch (ex) {
this._log.error("Error when calling _onInitError: " +
CommonUtils.exceptionStr(ex));
}
// This bypasses a lot of the checks in policy, such as respect for
// backoff. We should arguably not do this. However, reporting
// startup errors is important. And, they should not occur with much
// frequency in the wild. So, it shouldn't be too big of a deal.
if (!inShutdown &&
this._policy.ensureNotifyResponse(new Date()) &&
this._policy.healthReportUploadEnabled) {
// We don't care about what happens to this request. It's best
// effort.
let request = {
onNoDataAvailable: function () {},
onSubmissionSuccess: function () {},
onSubmissionFailureSoft: function () {},
onSubmissionFailureHard: function () {},
onUploadInProgress: function () {},
};
this._uploadData(request);
}
return result;
},
_onBagheeraResult: function (request, isDelete, date, result) {
this._log.debug("Received Bagheera result.");
return Task.spawn(function onBagheeraResult() {
let hrProvider = this.getProvider("org.mozilla.healthreport");
if (!result.transportSuccess) {
// The built-in provider may not be initialized if this instance failed
// to initialize fully.
if (hrProvider && !isDelete) {
hrProvider.recordEvent("uploadTransportFailure", date);
}
request.onSubmissionFailureSoft("Network transport error.");
throw new Task.Result(false);
}
if (!result.serverSuccess) {
if (hrProvider && !isDelete) {
hrProvider.recordEvent("uploadServerFailure", date);
}
request.onSubmissionFailureHard("Server failure.");
throw new Task.Result(false);
}
if (hrProvider && !isDelete) {
hrProvider.recordEvent("uploadSuccess", date);
}
if (isDelete) {
this._log.warn("Marking delete as successful.");
yield this._state.removeRemoteIDs([result.id]);
} else {
this._log.warn("Marking upload as successful.");
yield this._state.updateLastPingAndRemoveRemoteIDs(date, result.deleteIDs);
}
request.onSubmissionSuccess(this._now());
throw new Task.Result(true);
}.bind(this));
},
_onSubmitDataRequestFailure: function (error) {
this._log.error("Error processing request to submit data: " +
CommonUtils.exceptionStr(error));
},
_formatDate: function (date) {
// Why, oh, why doesn't JS have a strftime() equivalent?
return date.toISOString().substr(0, 10);
},
_uploadData: function (request) {
// Under ideal circumstances, clients should never race to this
// function. However, server logs have observed behavior where
// racing to this function could be a cause. So, this lock was
// instituted.
if (this._uploadInProgress) {
this._log.warn("Upload requested but upload already in progress.");
let provider = this.getProvider("org.mozilla.healthreport");
let promise = provider.recordEvent("uploadAlreadyInProgress");
request.onUploadInProgress("Upload already in progress.");
return promise;
}
let id = CommonUtils.generateUUID();
this._log.info("Uploading data to server: " + this.serverURI + " " +
this.serverNamespace + ":" + id);
let client = new BagheeraClient(this.serverURI);
let now = this._now();
return Task.spawn(function doUpload() {
try {
// The test for upload locking monkeypatches getJSONPayload.
// If the next two lines change, be sure to verify the test is
// accurate!
this._uploadInProgress = true;
let payload = yield this.getJSONPayload();
let histogram = Services.telemetry.getHistogramById(TELEMETRY_PAYLOAD_SIZE_UNCOMPRESSED);
histogram.add(payload.length);
let lastID = this.lastSubmitID;
yield this._state.addRemoteID(id);
let hrProvider = this.getProvider("org.mozilla.healthreport");
if (hrProvider) {
let event = lastID ? "continuationUploadAttempt"
: "firstDocumentUploadAttempt";
hrProvider.recordEvent(event, now);
}
TelemetryStopwatch.start(TELEMETRY_UPLOAD, this);
let result;
try {
let options = {
deleteIDs: this._state.remoteIDs.filter((x) => { return x != id; }),
telemetryCompressed: TELEMETRY_PAYLOAD_SIZE_COMPRESSED,
};
result = yield client.uploadJSON(this.serverNamespace, id, payload,
options);
TelemetryStopwatch.finish(TELEMETRY_UPLOAD, this);
} catch (ex) {
TelemetryStopwatch.cancel(TELEMETRY_UPLOAD, this);
if (hrProvider) {
hrProvider.recordEvent("uploadClientFailure", now);
}
throw ex;
}
yield this._onBagheeraResult(request, false, now, result);
} finally {
this._uploadInProgress = false;
}
}.bind(this));
},
/**
* Request deletion of remote data.
*
* @param request
* (DataSubmissionRequest) Tracks progress of this request.
*/
deleteRemoteData: function (request) {
if (!this._state.lastSubmitID) {
this._log.info("Received request to delete remote data but no data stored.");
request.onNoDataAvailable();
return;
}
this._log.warn("Deleting remote data.");
let client = new BagheeraClient(this.serverURI);
return client.deleteDocument(this.serverNamespace, this.lastSubmitID)
.then(this._onBagheeraResult.bind(this, request, true, this._now()),
this._onSubmitDataRequestFailure.bind(this));
},
});
Computing file changes ...
