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gecko/services/datareporting/policy.jsm
David Rajchenbach-Teller 047732cf2f Bug 992363 - Fix a few uncaught async errors in services. r=rnewman
2014-04-07 10:33:56 -04:00

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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/. */
/**
* This file is in transition. It was originally conceived to fulfill the
* needs of only Firefox Health Report. It is slowly being morphed into
* fulfilling the needs of all data reporting facilities in Gecko applications.
* As a result, some things feel a bit weird.
*
* DataReportingPolicy is both a driver for data reporting notification
* (a true policy) and the driver for FHR data submission. The latter should
* eventually be split into its own type and module.
*/
"use strict";
#ifndef MERGED_COMPARTMENT
this.EXPORTED_SYMBOLS = [
"DataSubmissionRequest", // For test use only.
"DataReportingPolicy",
];
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
#endif
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/Promise.jsm");
Cu.import("resource://gre/modules/Log.jsm");
Cu.import("resource://services-common/utils.js");
const MILLISECONDS_PER_DAY = 24 * 60 * 60 * 1000;
// Used as a sanity lower bound for dates stored in prefs. This module was
// implemented in 2012, so any earlier dates indicate an incorrect clock.
const OLDEST_ALLOWED_YEAR = 2012;
const CURRENT_POLICY_VERSION = 2;
/**
* Represents a request to display data policy.
*
* Instances of this are created when the policy is requesting the user's
* approval to agree to the data submission policy.
*
* Receivers of these instances are expected to call one or more of the on*
* functions when events occur.
*
* When one of these requests is received, the first thing a callee should do
* is present notification to the user of the data policy. When the notice
* is displayed to the user, the callee should call `onUserNotifyComplete`.
* This begins a countdown timer that upon completion will signal implicit
* acceptance of the policy. If for whatever reason the callee could not
* display a notice, it should call `onUserNotifyFailed`.
*
* Once the user is notified of the policy, the callee has the option of
* signaling explicit user acceptance or rejection of the policy. They do this
* by calling `onUserAccept` or `onUserReject`, respectively. These functions
* are essentially proxies to
* DataReportingPolicy.{recordUserAcceptance,recordUserRejection}.
*
* If the user never explicitly accepts or rejects the policy, it will be
* implicitly accepted after a specified duration of time. The notice is
* expected to remain displayed even after implicit acceptance (in case the
* user is away from the device). So, no event signaling implicit acceptance
* is exposed.
*
* Receivers of instances of this type should treat it as a black box with
* the exception of the on* functions.
*
* @param policy
* (DataReportingPolicy) The policy instance this request came from.
* @param deferred
* (deferred) The promise that will be fulfilled when display occurs.
*/
function NotifyPolicyRequest(policy, deferred) {
this.policy = policy;
this.deferred = deferred;
}
NotifyPolicyRequest.prototype = {
/**
* Called when the user is notified of the policy.
*
* This starts a countdown timer that will eventually signify implicit
* acceptance of the data policy.
*/
onUserNotifyComplete: function onUserNotified() {
this.deferred.resolve();
return this.deferred.promise;
},
/**
* Called when there was an error notifying the user about the policy.
*
* @param error
* (Error) Explains what went wrong.
*/
onUserNotifyFailed: function onUserNotifyFailed(error) {
this.deferred.reject(error);
},
/**
* Called when the user agreed to the data policy.
*
* @param reason
* (string) How the user agreed to the policy.
*/
onUserAccept: function onUserAccept(reason) {
this.policy.recordUserAcceptance(reason);
},
/**
* Called when the user rejected the data policy.
*
* @param reason
* (string) How the user rejected the policy.
*/
onUserReject: function onUserReject(reason) {
this.policy.recordUserRejection(reason);
},
};
Object.freeze(NotifyPolicyRequest.prototype);
/**
* Represents a request to submit data.
*
* Instances of this are created when the policy requests data upload or
* deletion.
*
* Receivers are expected to call one of the provided on* functions to signal
* completion of the request.
*
* Instances of this type should not be instantiated outside of this file.
* Receivers of instances of this type should not attempt to do anything with
* the instance except call one of the on* methods.
*/
this.DataSubmissionRequest = function (promise, expiresDate, isDelete) {
this.promise = promise;
this.expiresDate = expiresDate;
this.isDelete = isDelete;
this.state = null;
this.reason = null;
}
this.DataSubmissionRequest.prototype = Object.freeze({
NO_DATA_AVAILABLE: "no-data-available",
SUBMISSION_SUCCESS: "success",
SUBMISSION_FAILURE_SOFT: "failure-soft",
SUBMISSION_FAILURE_HARD: "failure-hard",
UPLOAD_IN_PROGRESS: "upload-in-progress",
/**
* No submission was attempted because no data was available.
*
* In the case of upload, this means there is no data to upload (perhaps
* it isn't available yet). In case of remote deletion, it means that there
* is no remote data to delete.
*/
onNoDataAvailable: function onNoDataAvailable() {
this.state = this.NO_DATA_AVAILABLE;
this.promise.resolve(this);
return this.promise.promise;
},
/**
* Data submission has completed successfully.
*
* In case of upload, this means the upload completed successfully. In case
* of deletion, the data was deleted successfully.
*
* @param date
* (Date) When data submission occurred.
*/
onSubmissionSuccess: function onSubmissionSuccess(date) {
this.state = this.SUBMISSION_SUCCESS;
this.submissionDate = date;
this.promise.resolve(this);
return this.promise.promise;
},
/**
* There was a recoverable failure when submitting data.
*
* Perhaps the server was down. Perhaps the network wasn't available. The
* policy may request submission again after a short delay.
*
* @param reason
* (string) Why the failure occurred. For logging purposes only.
*/
onSubmissionFailureSoft: function onSubmissionFailureSoft(reason=null) {
this.state = this.SUBMISSION_FAILURE_SOFT;
this.reason = reason;
this.promise.resolve(this);
return this.promise.promise;
},
/**
* There was an unrecoverable failure when submitting data.
*
* Perhaps the client is misconfigured. Perhaps the server rejected the data.
* Attempts at performing submission again will yield the same result. So,
* the policy should not try again (until the next day).
*
* @param reason
* (string) Why the failure occurred. For logging purposes only.
*/
onSubmissionFailureHard: function onSubmissionFailureHard(reason=null) {
this.state = this.SUBMISSION_FAILURE_HARD;
this.reason = reason;
this.promise.resolve(this);
return this.promise.promise;
},
/**
* The request was aborted because an upload was already in progress.
*/
onUploadInProgress: function (reason=null) {
this.state = this.UPLOAD_IN_PROGRESS;
this.reason = reason;
this.promise.resolve(this);
return this.promise.promise;
},
});
/**
* Manages scheduling of Firefox Health Report data submission.
*
* The rules of data submission are as follows:
*
* 1. Do not submit data more than once every 24 hours.
* 2. Try to submit as close to 24 hours apart as possible.
* 3. Do not submit too soon after application startup so as to not negatively
* impact performance at startup.
* 4. Before first ever data submission, the user should be notified about
* data collection practices.
* 5. User should have opportunity to react to this notification before
* data submission.
* 6. Display of notification without any explicit user action constitutes
* implicit consent after a certain duration of time.
* 7. If data submission fails, try at most 2 additional times before giving
* up on that day's submission.
*
* The listener passed into the instance must have the following properties
* (which are callbacks that will be invoked at certain key events):
*
* * onRequestDataUpload(request) - Called when the policy is requesting
* data to be submitted. The function is passed a `DataSubmissionRequest`.
* The listener should call one of the special resolving functions on that
* instance (see the documentation for that type).
*
* * onRequestRemoteDelete(request) - Called when the policy is requesting
* deletion of remotely stored data. The function is passed a
* `DataSubmissionRequest`. The listener should call one of the special
* resolving functions on that instance (just like `onRequestDataUpload`).
*
* * onNotifyDataPolicy(request) - Called when the policy is requesting the
* user to be notified that data submission will occur. The function
* receives a `NotifyPolicyRequest` instance. The callee should call one or
* more of the functions on that instance when specific events occur. See
* the documentation for that type for more.
*
* Note that the notification method is abstracted. Different applications
* can have different mechanisms by which they notify the user of data
* submission practices.
*
* @param policyPrefs
* (Preferences) Handle on preferences branch on which state will be
* queried and stored.
* @param healthReportPrefs
* (Preferences) Handle on preferences branch holding Health Report state.
* @param listener
* (object) Object with callbacks that will be invoked at certain key
* events.
*/
this.DataReportingPolicy = function (prefs, healthReportPrefs, listener) {
this._log = Log.repository.getLogger("Services.DataReporting.Policy");
this._log.level = Log.Level["Debug"];
for (let handler of this.REQUIRED_LISTENERS) {
if (!listener[handler]) {
throw new Error("Passed listener does not contain required handler: " +
handler);
}
}
this._prefs = prefs;
this._healthReportPrefs = healthReportPrefs;
this._listener = listener;
// If we've never run before, record the current time.
if (!this.firstRunDate.getTime()) {
this.firstRunDate = this.now();
}
// Install an observer so that we can act on changes from external
// code (such as Android UI).
// Use a function because this is the only place where the Preferences
// abstraction is way less usable than nsIPrefBranch.
//
// Hang on to the observer here so that tests can reach it.
this.uploadEnabledObserver = function onUploadEnabledChanged() {
if (this.pendingDeleteRemoteData || this.healthReportUploadEnabled) {
// Nothing to do: either we're already deleting because the caller
// came through the front door (rHRUE), or they set the flag to true.
return;
}
this._log.info("uploadEnabled pref changed. Scheduling deletion.");
this.deleteRemoteData();
}.bind(this);
healthReportPrefs.observe("uploadEnabled", this.uploadEnabledObserver);
// Ensure we are scheduled to submit.
if (!this.nextDataSubmissionDate.getTime()) {
this.nextDataSubmissionDate = this._futureDate(MILLISECONDS_PER_DAY);
}
// Date at which we performed user notification of acceptance.
// This is an instance variable because implicit acceptance should only
// carry forward through a single application instance.
this._dataSubmissionPolicyNotifiedDate = null;
// Record when we last requested for submitted data to be sent. This is
// to avoid having multiple outstanding requests.
this._inProgressSubmissionRequest = null;
};
this.DataReportingPolicy.prototype = Object.freeze({
/**
* How long after first run we should notify about data submission.
*/
SUBMISSION_NOTIFY_INTERVAL_MSEC: 12 * 60 * 60 * 1000,
/**
* Time that must elapse with no user action for implicit acceptance.
*
* THERE ARE POTENTIAL LEGAL IMPLICATIONS OF CHANGING THIS VALUE. Check with
* Privacy and/or Legal before modifying.
*/
IMPLICIT_ACCEPTANCE_INTERVAL_MSEC: 8 * 60 * 60 * 1000,
/**
* How often to poll to see if we need to do something.
*
* The interval needs to be short enough such that short-lived applications
* have an opportunity to submit data. But, it also needs to be long enough
* to not negatively impact performance.
*
* The random bit is to ensure that other systems scheduling around the same
* interval don't all get scheduled together.
*/
POLL_INTERVAL_MSEC: (60 * 1000) + Math.floor(2.5 * 1000 * Math.random()),
/**
* How long individual data submission requests live before expiring.
*
* Data submission requests have this long to complete before we give up on
* them and try again.
*
* We want this to be short enough that we retry frequently enough but long
* enough to give slow networks and systems time to handle it.
*/
SUBMISSION_REQUEST_EXPIRE_INTERVAL_MSEC: 10 * 60 * 1000,
/**
* Our backoff schedule in case of submission failure.
*
* This dictates both the number of times we retry a daily submission and
* when to retry after each failure.
*
* Each element represents how long to wait after each recoverable failure.
* After the first failure, we wait the time in element 0 before trying
* again. After the second failure, we wait the time in element 1. Once
* we run out of values in this array, we give up on that day's submission
* and schedule for a day out.
*/
FAILURE_BACKOFF_INTERVALS: [
15 * 60 * 1000,
60 * 60 * 1000,
],
/**
* State of user notification of data submission.
*/
STATE_NOTIFY_UNNOTIFIED: "not-notified",
STATE_NOTIFY_WAIT: "waiting",
STATE_NOTIFY_COMPLETE: "ok",
REQUIRED_LISTENERS: [
"onRequestDataUpload",
"onRequestRemoteDelete",
"onNotifyDataPolicy",
],
/**
* The first time the health report policy came into existence.
*
* This is used for scheduling of the initial submission.
*/
get firstRunDate() {
return CommonUtils.getDatePref(this._prefs, "firstRunTime", 0, this._log,
OLDEST_ALLOWED_YEAR);
},
set firstRunDate(value) {
this._log.debug("Setting first-run date: " + value);
CommonUtils.setDatePref(this._prefs, "firstRunTime", value,
OLDEST_ALLOWED_YEAR);
},
/**
* Short circuit policy checking and always assume acceptance.
*
* This shuld never be set by the user. Instead, it is a per-application or
* per-deployment default pref.
*/
get dataSubmissionPolicyBypassAcceptance() {
return this._prefs.get("dataSubmissionPolicyBypassAcceptance", false);
},
/**
* When the user was notified that data submission could occur.
*
* This is used for logging purposes. this._dataSubmissionPolicyNotifiedDate
* is what's used internally.
*/
get dataSubmissionPolicyNotifiedDate() {
return CommonUtils.getDatePref(this._prefs,
"dataSubmissionPolicyNotifiedTime", 0,
this._log, OLDEST_ALLOWED_YEAR);
},
set dataSubmissionPolicyNotifiedDate(value) {
this._log.debug("Setting user notified date: " + value);
CommonUtils.setDatePref(this._prefs, "dataSubmissionPolicyNotifiedTime",
value, OLDEST_ALLOWED_YEAR);
},
/**
* When the user accepted or rejected the data submission policy.
*
* If there was implicit acceptance, this will be set to the time of that.
*/
get dataSubmissionPolicyResponseDate() {
return CommonUtils.getDatePref(this._prefs,
"dataSubmissionPolicyResponseTime",
0, this._log, OLDEST_ALLOWED_YEAR);
},
set dataSubmissionPolicyResponseDate(value) {
this._log.debug("Setting user notified reaction date: " + value);
CommonUtils.setDatePref(this._prefs,
"dataSubmissionPolicyResponseTime",
value, OLDEST_ALLOWED_YEAR);
},
/**
* Records the result of user notification of data submission policy.
*
* This is used for logging and diagnostics purposes. It can answer the
* question "how was data submission agreed to on this profile?"
*
* Not all values are defined by this type and can come from other systems.
*
* The value must be a string and should be something machine readable. e.g.
* "accept-user-clicked-ok-button-in-info-bar"
*/
get dataSubmissionPolicyResponseType() {
return this._prefs.get("dataSubmissionPolicyResponseType",
"none-recorded");
},
set dataSubmissionPolicyResponseType(value) {
if (typeof(value) != "string") {
throw new Error("Value must be a string. Got " + typeof(value));
}
this._prefs.set("dataSubmissionPolicyResponseType", value);
},
/**
* Whether submission of data is allowed.
*
* This is the master switch for remote server communication. If it is
* false, we never request upload or deletion.
*/
get dataSubmissionEnabled() {
// Default is true because we are opt-out.
return this._prefs.get("dataSubmissionEnabled", true);
},
set dataSubmissionEnabled(value) {
this._prefs.set("dataSubmissionEnabled", !!value);
},
/**
* The minimum policy version which for dataSubmissionPolicyAccepted to
* to be valid.
*/
get minimumPolicyVersion() {
// First check if the current channel has an ove
let channel = Services.appinfo.defaultUpdateChannel;
let channelPref = this._prefs.get("minimumPolicyVersion.channel-" + channel);
return channelPref !== undefined ?
channelPref : this._prefs.get("minimumPolicyVersion", 1);
},
/**
* Whether the user has accepted that data submission can occur.
*
* This overrides dataSubmissionEnabled.
*/
get dataSubmissionPolicyAccepted() {
// Be conservative and default to false.
let enabled = this._prefs.get("dataSubmissionPolicyAccepted", false);
if (!enabled)
return false;
let acceptedVersion = this._prefs.get("dataSubmissionPolicyAcceptedVersion");
return acceptedVersion >= this.minimumPolicyVersion;
},
set dataSubmissionPolicyAccepted(value) {
this._prefs.set("dataSubmissionPolicyAccepted", !!value);
if (!!value)
this._prefs.set("dataSubmissionPolicyAcceptedVersion", CURRENT_POLICY_VERSION);
else
this._prefs.reset("dataSubmissionPolicyAcceptedVersion");
},
/**
* The state of user notification of the data policy.
*
* This must be DataReportingPolicy.STATE_NOTIFY_COMPLETE before data
* submission can occur.
*
* @return DataReportingPolicy.STATE_NOTIFY_* constant.
*/
get notifyState() {
if (this.dataSubmissionPolicyResponseDate.getTime()) {
return this.STATE_NOTIFY_COMPLETE;
}
// We get the local state - not the state from prefs - because we don't want
// a value from a previous application run to interfere. This prevents
// a scenario where notification occurs just before application shutdown and
// notification is displayed for shorter than the policy requires.
if (!this._dataSubmissionPolicyNotifiedDate) {
return this.STATE_NOTIFY_UNNOTIFIED;
}
return this.STATE_NOTIFY_WAIT;
},
/**
* When this policy last requested data submission.
*
* This is used mainly for forensics purposes and should have no bearing
* on scheduling or run-time behavior.
*/
get lastDataSubmissionRequestedDate() {
return CommonUtils.getDatePref(this._healthReportPrefs,
"lastDataSubmissionRequestedTime", 0,
this._log, OLDEST_ALLOWED_YEAR);
},
set lastDataSubmissionRequestedDate(value) {
CommonUtils.setDatePref(this._healthReportPrefs,
"lastDataSubmissionRequestedTime",
value, OLDEST_ALLOWED_YEAR);
},
/**
* When the last data submission actually occurred.
*
* This is used mainly for forensics purposes and should have no bearing on
* actual scheduling.
*/
get lastDataSubmissionSuccessfulDate() {
return CommonUtils.getDatePref(this._healthReportPrefs,
"lastDataSubmissionSuccessfulTime", 0,
this._log, OLDEST_ALLOWED_YEAR);
},
set lastDataSubmissionSuccessfulDate(value) {
CommonUtils.setDatePref(this._healthReportPrefs,
"lastDataSubmissionSuccessfulTime",
value, OLDEST_ALLOWED_YEAR);
},
/**
* When we last encountered a submission failure.
*
* This is used for forensics purposes and should have no bearing on
* scheduling.
*/
get lastDataSubmissionFailureDate() {
return CommonUtils.getDatePref(this._healthReportPrefs,
"lastDataSubmissionFailureTime",
0, this._log, OLDEST_ALLOWED_YEAR);
},
set lastDataSubmissionFailureDate(value) {
CommonUtils.setDatePref(this._healthReportPrefs,
"lastDataSubmissionFailureTime",
value, OLDEST_ALLOWED_YEAR);
},
/**
* When the next data submission is scheduled to occur.
*
* This is maintained internally by this type. External users should not
* mutate this value.
*/
get nextDataSubmissionDate() {
return CommonUtils.getDatePref(this._healthReportPrefs,
"nextDataSubmissionTime", 0,
this._log, OLDEST_ALLOWED_YEAR);
},
set nextDataSubmissionDate(value) {
CommonUtils.setDatePref(this._healthReportPrefs,
"nextDataSubmissionTime", value,
OLDEST_ALLOWED_YEAR);
},
/**
* The number of submission failures for this day's upload.
*
* This is used to drive backoff and scheduling.
*/
get currentDaySubmissionFailureCount() {
let v = this._healthReportPrefs.get("currentDaySubmissionFailureCount", 0);
if (!Number.isInteger(v)) {
v = 0;
}
return v;
},
set currentDaySubmissionFailureCount(value) {
if (!Number.isInteger(value)) {
throw new Error("Value must be integer: " + value);
}
this._healthReportPrefs.set("currentDaySubmissionFailureCount", value);
},
/**
* Whether a request to delete remote data is awaiting completion.
*
* If this is true, the policy will request that remote data be deleted.
* Furthermore, no new data will be uploaded (if it's even allowed) until
* the remote deletion is fulfilled.
*/
get pendingDeleteRemoteData() {
return !!this._healthReportPrefs.get("pendingDeleteRemoteData", false);
},
set pendingDeleteRemoteData(value) {
this._healthReportPrefs.set("pendingDeleteRemoteData", !!value);
},
/**
* Whether upload of Firefox Health Report data is enabled.
*/
get healthReportUploadEnabled() {
return !!this._healthReportPrefs.get("uploadEnabled", true);
},
// External callers should update this via `recordHealthReportUploadEnabled`
// to ensure appropriate side-effects are performed.
set healthReportUploadEnabled(value) {
this._healthReportPrefs.set("uploadEnabled", !!value);
},
/**
* Whether the FHR upload enabled setting is locked and can't be changed.
*/
get healthReportUploadLocked() {
return this._healthReportPrefs.locked("uploadEnabled");
},
/**
* Record user acceptance of data submission policy.
*
* Data submission will not be allowed to occur until this is called.
*
* This is typically called through the `onUserAccept` property attached to
* the promise passed to `onUserNotify` in the policy listener. But, it can
* be called through other interfaces at any time and the call will have
* an impact on future data submissions.
*
* @param reason
* (string) How the user accepted the data submission policy.
*/
recordUserAcceptance: function recordUserAcceptance(reason="no-reason") {
this._log.info("User accepted data submission policy: " + reason);
this.dataSubmissionPolicyResponseDate = this.now();
this.dataSubmissionPolicyResponseType = "accepted-" + reason;
this.dataSubmissionPolicyAccepted = true;
},
/**
* Record user rejection of submission policy.
*
* Data submission will not be allowed to occur if this is called.
*
* This is typically called through the `onUserReject` property attached to
* the promise passed to `onUserNotify` in the policy listener. But, it can
* be called through other interfaces at any time and the call will have an
* impact on future data submissions.
*/
recordUserRejection: function recordUserRejection(reason="no-reason") {
this._log.info("User rejected data submission policy: " + reason);
this.dataSubmissionPolicyResponseDate = this.now();
this.dataSubmissionPolicyResponseType = "rejected-" + reason;
this.dataSubmissionPolicyAccepted = false;
},
/**
* Record the user's intent for whether FHR should upload data.
*
* This is the preferred way for XUL applications to record a user's
* preference on whether Firefox Health Report should upload data to
* a server.
*
* If upload is disabled through this API, a request for remote data
* deletion is initiated automatically.
*
* If upload is being disabled and this operation is scheduled to
* occur immediately, a promise will be returned. This promise will be
* fulfilled when the deletion attempt finishes. If upload is being
* disabled and a promise is not returned, callers must poll
* `haveRemoteData` on the HealthReporter instance to see if remote
* data has been deleted.
*
* @param flag
* (bool) Whether data submission is enabled or disabled.
* @param reason
* (string) Why this value is being adjusted. For logging
* purposes only.
*/
recordHealthReportUploadEnabled: function (flag, reason="no-reason") {
let result = null;
if (!flag) {
result = this.deleteRemoteData(reason);
}
this.healthReportUploadEnabled = flag;
return result;
},
/**
* Request that remote data be deleted.
*
* This will record an intent that previously uploaded data is to be deleted.
* The policy will eventually issue a request to the listener for data
* deletion. It will keep asking for deletion until the listener acknowledges
* that data has been deleted.
*/
deleteRemoteData: function deleteRemoteData(reason="no-reason") {
this._log.info("Remote data deletion requested: " + reason);
this.pendingDeleteRemoteData = true;
// We want delete deletion to occur as soon as possible. Move up any
// pending scheduled data submission and try to trigger.
this.nextDataSubmissionDate = this.now();
return this.checkStateAndTrigger();
},
/**
* Start background polling for activity.
*
* This will set up a recurring timer that will periodically check if
* activity is warranted.
*
* You typically call this function for each constructed instance.
*/
startPolling: function startPolling() {
this.stopPolling();
this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
this._timer.initWithCallback({
notify: function notify() {
this.checkStateAndTrigger();
}.bind(this)
}, this.POLL_INTERVAL_MSEC, this._timer.TYPE_REPEATING_SLACK);
},
/**
* Stop background polling for activity.
*
* This should be called when the instance is no longer needed.
*/
stopPolling: function stopPolling() {
if (this._timer) {
this._timer.cancel();
this._timer = null;
}
},
/**
* Abstraction for obtaining current time.
*
* The purpose of this is to facilitate testing. Testing code can monkeypatch
* this on instances instead of modifying the singleton Date object.
*/
now: function now() {
return new Date();
},
/**
* Check state and trigger actions, if necessary.
*
* This is what enforces the submission and notification policy detailed
* above. You can think of this as the driver for health report data
* submission.
*
* Typically this function is called automatically by the background polling.
* But, it can safely be called manually as needed.
*/
checkStateAndTrigger: function checkStateAndTrigger() {
// If the master data submission kill switch is toggled, we have nothing
// to do. We don't notify about data policies because this would have
// no effect.
if (!this.dataSubmissionEnabled) {
this._log.debug("Data submission is disabled. Doing nothing.");
return;
}
let now = this.now();
let nowT = now.getTime();
let nextSubmissionDate = this.nextDataSubmissionDate;
// If the system clock were ever set to a time in the distant future,
// it's possible our next schedule date is far out as well. We know
// we shouldn't schedule for more than a day out, so we reset the next
// scheduled date appropriately. 3 days was chosen arbitrarily.
if (nextSubmissionDate.getTime() >= nowT + 3 * MILLISECONDS_PER_DAY) {
this._log.warn("Next data submission time is far away. Was the system " +
"clock recently readjusted? " + nextSubmissionDate);
// It shouldn't really matter what we set this to. 1 day in the future
// should be pretty safe.
this._moveScheduleForward24h();
// Fall through since we may have other actions.
}
// Tend to any in progress work.
if (this._processInProgressSubmission()) {
return;
}
// Requests to delete remote data take priority above everything else.
if (this.pendingDeleteRemoteData) {
if (nowT < nextSubmissionDate.getTime()) {
this._log.debug("Deletion request is scheduled for the future: " +
nextSubmissionDate);
return;
}
return this._dispatchSubmissionRequest("onRequestRemoteDelete", true);
}
if (!this.healthReportUploadEnabled) {
this._log.debug("Data upload is disabled. Doing nothing.");
return;
}
// If the user hasn't responded to the data policy, don't do anything.
if (!this.ensureNotifyResponse(now)) {
return;
}
// User has opted out of data submission.
if (!this.dataSubmissionPolicyAccepted && !this.dataSubmissionPolicyBypassAcceptance) {
this._log.debug("Data submission has been disabled per user request.");
return;
}
// User has responded to data policy and data submission is enabled. Now
// comes the scheduling part.
if (nowT < nextSubmissionDate.getTime()) {
this._log.debug("Next data submission is scheduled in the future: " +
nextSubmissionDate);
return;
}
return this._dispatchSubmissionRequest("onRequestDataUpload", false);
},
/**
* Ensure user has responded to data submission policy.
*
* This must be called before data submission. If the policy has not been
* responded to, data submission must not occur.
*
* @return bool Whether user has responded to data policy.
*/
ensureNotifyResponse: function ensureNotifyResponse(now) {
if (this.dataSubmissionPolicyBypassAcceptance) {
return true;
}
let notifyState = this.notifyState;
if (notifyState == this.STATE_NOTIFY_UNNOTIFIED) {
let notifyAt = new Date(this.firstRunDate.getTime() +
this.SUBMISSION_NOTIFY_INTERVAL_MSEC);
if (now.getTime() < notifyAt.getTime()) {
this._log.debug("Don't have to notify about data submission yet.");
return false;
}
let onComplete = function onComplete() {
this._log.info("Data submission notification presented.");
let now = this.now();
this._dataSubmissionPolicyNotifiedDate = now;
this.dataSubmissionPolicyNotifiedDate = now;
}.bind(this);
let deferred = Promise.defer();
deferred.promise.then(onComplete, (error) => {
this._log.warn("Data policy notification presentation failed: " +
CommonUtils.exceptionStr(error));
});
this._log.info("Requesting display of data policy.");
let request = new NotifyPolicyRequest(this, deferred);
try {
this._listener.onNotifyDataPolicy(request);
} catch (ex) {
this._log.warn("Exception when calling onNotifyDataPolicy: " +
CommonUtils.exceptionStr(ex));
}
return false;
}
// We're waiting for user action or implicit acceptance after display.
if (notifyState == this.STATE_NOTIFY_WAIT) {
// Check for implicit acceptance.
let implicitAcceptance =
this._dataSubmissionPolicyNotifiedDate.getTime() +
this.IMPLICIT_ACCEPTANCE_INTERVAL_MSEC;
this._log.debug("Now: " + now.getTime());
this._log.debug("Will accept: " + implicitAcceptance);
if (now.getTime() < implicitAcceptance) {
this._log.debug("Still waiting for reaction or implicit acceptance. " +
"Now: " + now.getTime() + " < " +
"Accept: " + implicitAcceptance);
return false;
}
this.recordUserAcceptance("implicit-time-elapsed");
return true;
}
// If this happens, we have a coding error in this file.
if (notifyState != this.STATE_NOTIFY_COMPLETE) {
throw new Error("Unknown notification state: " + notifyState);
}
return true;
},
_processInProgressSubmission: function _processInProgressSubmission() {
if (!this._inProgressSubmissionRequest) {
return false;
}
let now = this.now().getTime();
if (this._inProgressSubmissionRequest.expiresDate.getTime() > now) {
this._log.info("Waiting on in-progress submission request to finish.");
return true;
}
this._log.warn("Old submission request has expired from no activity.");
this._inProgressSubmissionRequest.promise.reject(new Error("Request has expired."));
this._inProgressSubmissionRequest = null;
this._handleSubmissionFailure();
return false;
},
_dispatchSubmissionRequest: function _dispatchSubmissionRequest(handler, isDelete) {
let now = this.now();
// We're past our scheduled next data submission date, so let's do it!
this.lastDataSubmissionRequestedDate = now;
let deferred = Promise.defer();
let requestExpiresDate =
this._futureDate(this.SUBMISSION_REQUEST_EXPIRE_INTERVAL_MSEC);
this._inProgressSubmissionRequest = new DataSubmissionRequest(deferred,
requestExpiresDate,
isDelete);
let onSuccess = function onSuccess(result) {
this._inProgressSubmissionRequest = null;
this._handleSubmissionResult(result);
}.bind(this);
let onError = function onError(error) {
this._log.error("Error when handling data submission result: " +
CommonUtils.exceptionStr(error));
this._inProgressSubmissionRequest = null;
this._handleSubmissionFailure();
}.bind(this);
let chained = deferred.promise.then(onSuccess, onError);
this._log.info("Requesting data submission. Will expire at " +
requestExpiresDate);
try {
this._listener[handler](this._inProgressSubmissionRequest);
} catch (ex) {
this._log.warn("Exception when calling " + handler + ": " +
CommonUtils.exceptionStr(ex));
this._inProgressSubmissionRequest = null;
this._handleSubmissionFailure();
return;
}
return chained;
},
_handleSubmissionResult: function _handleSubmissionResult(request) {
let state = request.state;
let reason = request.reason || "no reason";
this._log.info("Got submission request result: " + state);
if (state == request.SUBMISSION_SUCCESS) {
if (request.isDelete) {
this.pendingDeleteRemoteData = false;
this._log.info("Successful data delete reported.");
} else {
this._log.info("Successful data upload reported.");
}
this.lastDataSubmissionSuccessfulDate = request.submissionDate;
let nextSubmissionDate =
new Date(request.submissionDate.getTime() + MILLISECONDS_PER_DAY);
// Schedule pending deletes immediately. This has potential to overload
// the server. However, the frequency of delete requests across all
// clients should be low, so this shouldn't pose a problem.
if (this.pendingDeleteRemoteData) {
nextSubmissionDate = this.now();
}
this.nextDataSubmissionDate = nextSubmissionDate;
this.currentDaySubmissionFailureCount = 0;
return;
}
if (state == request.NO_DATA_AVAILABLE) {
if (request.isDelete) {
this._log.info("Remote data delete requested but no remote data was stored.");
this.pendingDeleteRemoteData = false;
return;
}
this._log.info("No data was available to submit. May try later.");
this._handleSubmissionFailure();
return;
}
// We don't special case request.isDelete for these failures because it
// likely means there was a server error.
if (state == request.SUBMISSION_FAILURE_SOFT) {
this._log.warn("Soft error submitting data: " + reason);
this.lastDataSubmissionFailureDate = this.now();
this._handleSubmissionFailure();
return;
}
if (state == request.SUBMISSION_FAILURE_HARD) {
this._log.warn("Hard error submitting data: " + reason);
this.lastDataSubmissionFailureDate = this.now();
this._moveScheduleForward24h();
return;
}
throw new Error("Unknown state on DataSubmissionRequest: " + request.state);
},
_handleSubmissionFailure: function _handleSubmissionFailure() {
if (this.currentDaySubmissionFailureCount >= this.FAILURE_BACKOFF_INTERVALS.length) {
this._log.warn("Reached the limit of daily submission attempts. " +
"Rescheduling for tomorrow.");
this._moveScheduleForward24h();
return false;
}
let offset = this.FAILURE_BACKOFF_INTERVALS[this.currentDaySubmissionFailureCount];
this.nextDataSubmissionDate = this._futureDate(offset);
this.currentDaySubmissionFailureCount++;
return true;
},
_moveScheduleForward24h: function _moveScheduleForward24h() {
let d = this._futureDate(MILLISECONDS_PER_DAY);
this._log.info("Setting next scheduled data submission for " + d);
this.nextDataSubmissionDate = d;
this.currentDaySubmissionFailureCount = 0;
},
_futureDate: function _futureDate(offset) {
return new Date(this.now().getTime() + offset);
},
});
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