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tenfourfox/dom/network/NetworkStatsDB.jsm
Cameron Kaiser c9b2922b70 hello FPR
2017-04-19 00:56:45 -07:00

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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/. */
"use strict";
this.EXPORTED_SYMBOLS = ['NetworkStatsDB'];
const DEBUG = false;
function debug(s) { dump("-*- NetworkStatsDB: " + s + "\n"); }
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/IndexedDBHelper.jsm");
Cu.importGlobalProperties(["indexedDB"]);
XPCOMUtils.defineLazyServiceGetter(this, "appsService",
"@mozilla.org/AppsService;1",
"nsIAppsService");
const DB_NAME = "net_stats";
const DB_VERSION = 9;
const DEPRECATED_STATS_STORE_NAME =
[
"net_stats_v2", // existed only in DB version 2
"net_stats", // existed in DB version 1 and 3 to 5
"net_stats_store", // existed in DB version 6 to 8
];
const STATS_STORE_NAME = "net_stats_store_v3"; // since DB version 9
const ALARMS_STORE_NAME = "net_alarm";
// Constant defining the maximum values allowed per interface. If more, older
// will be erased.
const VALUES_MAX_LENGTH = 6 * 30;
// Constant defining the rate of the samples. Daily.
const SAMPLE_RATE = 1000 * 60 * 60 * 24;
this.NetworkStatsDB = function NetworkStatsDB() {
if (DEBUG) {
debug("Constructor");
}
this.initDBHelper(DB_NAME, DB_VERSION, [STATS_STORE_NAME, ALARMS_STORE_NAME]);
}
NetworkStatsDB.prototype = {
__proto__: IndexedDBHelper.prototype,
dbNewTxn: function dbNewTxn(store_name, txn_type, callback, txnCb) {
function successCb(result) {
txnCb(null, result);
}
function errorCb(error) {
txnCb(error, null);
}
return this.newTxn(txn_type, store_name, callback, successCb, errorCb);
},
/**
* The onupgradeneeded handler of the IDBOpenDBRequest.
* This function is called in IndexedDBHelper open() method.
*
* @param {IDBTransaction} aTransaction
* {IDBDatabase} aDb
* {64-bit integer} aOldVersion The version number on local storage.
* {64-bit integer} aNewVersion The version number to be upgraded to.
*
* @note Be careful with the database upgrade pattern.
* Because IndexedDB operations are performed asynchronously, we must
* apply a recursive approach instead of an iterative approach while
* upgrading versions.
*/
upgradeSchema: function upgradeSchema(aTransaction, aDb, aOldVersion, aNewVersion) {
if (DEBUG) {
debug("upgrade schema from: " + aOldVersion + " to " + aNewVersion + " called!");
}
let db = aDb;
let objectStore;
// An array of upgrade functions for each version.
let upgradeSteps = [
function upgrade0to1() {
if (DEBUG) debug("Upgrade 0 to 1: Create object stores and indexes.");
// Create the initial database schema.
objectStore = db.createObjectStore(DEPRECATED_STATS_STORE_NAME[1],
{ keyPath: ["connectionType", "timestamp"] });
objectStore.createIndex("connectionType", "connectionType", { unique: false });
objectStore.createIndex("timestamp", "timestamp", { unique: false });
objectStore.createIndex("rxBytes", "rxBytes", { unique: false });
objectStore.createIndex("txBytes", "txBytes", { unique: false });
objectStore.createIndex("rxTotalBytes", "rxTotalBytes", { unique: false });
objectStore.createIndex("txTotalBytes", "txTotalBytes", { unique: false });
upgradeNextVersion();
},
function upgrade1to2() {
if (DEBUG) debug("Upgrade 1 to 2: Do nothing.");
upgradeNextVersion();
},
function upgrade2to3() {
if (DEBUG) debug("Upgrade 2 to 3: Add keyPath appId to object store.");
// In order to support per-app traffic data storage, the original
// objectStore needs to be replaced by a new objectStore with new
// key path ("appId") and new index ("appId").
// Also, since now networks are identified by their
// [networkId, networkType] not just by their connectionType,
// to modify the keyPath is mandatory to delete the object store
// and create it again. Old data is going to be deleted because the
// networkId for each sample can not be set.
// In version 1.2 objectStore name was 'net_stats_v2', to avoid errors when
// upgrading from 1.2 to 1.3 objectStore name should be checked.
let stores = db.objectStoreNames;
let deprecatedName = DEPRECATED_STATS_STORE_NAME[0];
let storeName = DEPRECATED_STATS_STORE_NAME[1];
if(stores.contains(deprecatedName)) {
// Delete the obsolete stats store.
db.deleteObjectStore(deprecatedName);
} else {
// Re-create stats object store without copying records.
db.deleteObjectStore(storeName);
}
objectStore = db.createObjectStore(storeName, { keyPath: ["appId", "network", "timestamp"] });
objectStore.createIndex("appId", "appId", { unique: false });
objectStore.createIndex("network", "network", { unique: false });
objectStore.createIndex("networkType", "networkType", { unique: false });
objectStore.createIndex("timestamp", "timestamp", { unique: false });
objectStore.createIndex("rxBytes", "rxBytes", { unique: false });
objectStore.createIndex("txBytes", "txBytes", { unique: false });
objectStore.createIndex("rxTotalBytes", "rxTotalBytes", { unique: false });
objectStore.createIndex("txTotalBytes", "txTotalBytes", { unique: false });
upgradeNextVersion();
},
function upgrade3to4() {
if (DEBUG) debug("Upgrade 3 to 4: Delete redundant indexes.");
// Delete redundant indexes (leave "network" only).
objectStore = aTransaction.objectStore(DEPRECATED_STATS_STORE_NAME[1]);
if (objectStore.indexNames.contains("appId")) {
objectStore.deleteIndex("appId");
}
if (objectStore.indexNames.contains("networkType")) {
objectStore.deleteIndex("networkType");
}
if (objectStore.indexNames.contains("timestamp")) {
objectStore.deleteIndex("timestamp");
}
if (objectStore.indexNames.contains("rxBytes")) {
objectStore.deleteIndex("rxBytes");
}
if (objectStore.indexNames.contains("txBytes")) {
objectStore.deleteIndex("txBytes");
}
if (objectStore.indexNames.contains("rxTotalBytes")) {
objectStore.deleteIndex("rxTotalBytes");
}
if (objectStore.indexNames.contains("txTotalBytes")) {
objectStore.deleteIndex("txTotalBytes");
}
upgradeNextVersion();
},
function upgrade4to5() {
if (DEBUG) debug("Upgrade 4 to 5: Create object store for alarms.");
// In order to manage alarms, it is necessary to use a global counter
// (totalBytes) that will increase regardless of the system reboot.
objectStore = aTransaction.objectStore(DEPRECATED_STATS_STORE_NAME[1]);
// Now, systemBytes will hold the old totalBytes and totalBytes will
// keep the increasing counter. |counters| will keep the track of
// accumulated values.
let counters = {};
objectStore.openCursor().onsuccess = function(event) {
let cursor = event.target.result;
if (!cursor){
// upgrade4to5 completed now.
upgradeNextVersion();
return;
}
cursor.value.rxSystemBytes = cursor.value.rxTotalBytes;
cursor.value.txSystemBytes = cursor.value.txTotalBytes;
if (cursor.value.appId == 0) {
let netId = cursor.value.network[0] + '' + cursor.value.network[1];
if (!counters[netId]) {
counters[netId] = {
rxCounter: 0,
txCounter: 0,
lastRx: 0,
lastTx: 0
};
}
let rxDiff = cursor.value.rxSystemBytes - counters[netId].lastRx;
let txDiff = cursor.value.txSystemBytes - counters[netId].lastTx;
if (rxDiff < 0 || txDiff < 0) {
// System reboot between samples, so take the current one.
rxDiff = cursor.value.rxSystemBytes;
txDiff = cursor.value.txSystemBytes;
}
counters[netId].rxCounter += rxDiff;
counters[netId].txCounter += txDiff;
cursor.value.rxTotalBytes = counters[netId].rxCounter;
cursor.value.txTotalBytes = counters[netId].txCounter;
counters[netId].lastRx = cursor.value.rxSystemBytes;
counters[netId].lastTx = cursor.value.txSystemBytes;
} else {
cursor.value.rxTotalBytes = cursor.value.rxSystemBytes;
cursor.value.txTotalBytes = cursor.value.txSystemBytes;
}
cursor.update(cursor.value);
cursor.continue();
};
// Create object store for alarms.
objectStore = db.createObjectStore(ALARMS_STORE_NAME, { keyPath: "id", autoIncrement: true });
objectStore.createIndex("alarm", ['networkId','threshold'], { unique: false });
objectStore.createIndex("manifestURL", "manifestURL", { unique: false });
},
function upgrade5to6() {
if (DEBUG) debug("Upgrade 5 to 6: Add keyPath serviceType to object store.");
// In contrast to "per-app" traffic data, "system-only" traffic data
// refers to data which can not be identified by any applications.
// To further support "system-only" data storage, the data can be
// saved by service type (e.g., Tethering, OTA). Thus it's needed to
// have a new key ("serviceType") for the ojectStore.
let newObjectStore;
let deprecatedName = DEPRECATED_STATS_STORE_NAME[1];
newObjectStore = db.createObjectStore(DEPRECATED_STATS_STORE_NAME[2],
{ keyPath: ["appId", "serviceType", "network", "timestamp"] });
newObjectStore.createIndex("network", "network", { unique: false });
// Copy the data from the original objectStore to the new objectStore.
objectStore = aTransaction.objectStore(deprecatedName);
objectStore.openCursor().onsuccess = function(event) {
let cursor = event.target.result;
if (!cursor) {
db.deleteObjectStore(deprecatedName);
// upgrade5to6 completed now.
upgradeNextVersion();
return;
}
let newStats = cursor.value;
newStats.serviceType = "";
newObjectStore.put(newStats);
cursor.continue();
};
},
function upgrade6to7() {
if (DEBUG) debug("Upgrade 6 to 7: Replace alarm threshold by relativeThreshold.");
// Replace threshold attribute of alarm index by relativeThreshold in alarms DB.
// Now alarms are indexed by relativeThreshold, which is the threshold relative
// to current system stats.
let alarmsStore = aTransaction.objectStore(ALARMS_STORE_NAME);
// Delete "alarm" index.
if (alarmsStore.indexNames.contains("alarm")) {
alarmsStore.deleteIndex("alarm");
}
// Create new "alarm" index.
alarmsStore.createIndex("alarm", ['networkId','relativeThreshold'], { unique: false });
// Populate new "alarm" index attributes.
alarmsStore.openCursor().onsuccess = function(event) {
let cursor = event.target.result;
if (!cursor) {
upgrade6to7_updateTotalBytes();
return;
}
cursor.value.relativeThreshold = cursor.value.threshold;
cursor.value.absoluteThreshold = cursor.value.threshold;
delete cursor.value.threshold;
cursor.update(cursor.value);
cursor.continue();
}
function upgrade6to7_updateTotalBytes() {
if (DEBUG) debug("Upgrade 6 to 7: Update TotalBytes.");
// Previous versions save accumulative totalBytes, increasing although the system
// reboots or resets stats. But is necessary to reset the total counters when reset
// through 'clearInterfaceStats'.
let statsStore = aTransaction.objectStore(DEPRECATED_STATS_STORE_NAME[2]);
let networks = [];
// Find networks stored in the database.
statsStore.index("network").openKeyCursor(null, "nextunique").onsuccess = function(event) {
let cursor = event.target.result;
// Store each network into an array.
if (cursor) {
networks.push(cursor.key);
cursor.continue();
return;
}
// Start to deal with each network.
let pending = networks.length;
if (pending === 0) {
// Found no records of network. upgrade6to7 completed now.
upgradeNextVersion();
return;
}
networks.forEach(function(network) {
let lowerFilter = [0, "", network, 0];
let upperFilter = [0, "", network, ""];
let range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
// Find number of samples for a given network.
statsStore.count(range).onsuccess = function(event) {
let recordCount = event.target.result;
// If there are more samples than the max allowed, there is no way to know
// when does reset take place.
if (recordCount === 0 || recordCount >= VALUES_MAX_LENGTH) {
pending--;
if (pending === 0) {
upgradeNextVersion();
}
return;
}
let last = null;
// Reset detected if the first sample totalCounters are different than bytes
// counters. If so, the total counters should be recalculated.
statsStore.openCursor(range).onsuccess = function(event) {
let cursor = event.target.result;
if (!cursor) {
pending--;
if (pending === 0) {
upgradeNextVersion();
}
return;
}
if (!last) {
if (cursor.value.rxTotalBytes == cursor.value.rxBytes &&
cursor.value.txTotalBytes == cursor.value.txBytes) {
pending--;
if (pending === 0) {
upgradeNextVersion();
}
return;
}
cursor.value.rxTotalBytes = cursor.value.rxBytes;
cursor.value.txTotalBytes = cursor.value.txBytes;
cursor.update(cursor.value);
last = cursor.value;
cursor.continue();
return;
}
// Recalculate the total counter for last / current sample
cursor.value.rxTotalBytes = last.rxTotalBytes + cursor.value.rxBytes;
cursor.value.txTotalBytes = last.txTotalBytes + cursor.value.txBytes;
cursor.update(cursor.value);
last = cursor.value;
cursor.continue();
}
}
}, this); // end of networks.forEach()
}; // end of statsStore.index("network").openKeyCursor().onsuccess callback
} // end of function upgrade6to7_updateTotalBytes
},
function upgrade7to8() {
if (DEBUG) debug("Upgrade 7 to 8: Create index serviceType.");
// Create index for 'ServiceType' in order to make it retrievable.
let statsStore = aTransaction.objectStore(DEPRECATED_STATS_STORE_NAME[2]);
statsStore.createIndex("serviceType", "serviceType", { unique: false });
upgradeNextVersion();
},
function upgrade8to9() {
if (DEBUG) debug("Upgrade 8 to 9: Add keyPath isInBrowser to " +
"network stats object store");
// Since B2G v2.0, there is no stand-alone browser app anymore.
// The browser app is a mozbrowser iframe element owned by system app.
// In order to separate traffic generated from system and browser, we
// have to add a new attribute |isInBrowser| as keyPath.
// Refer to bug 1070944 for more detail.
let newObjectStore;
let deprecatedName = DEPRECATED_STATS_STORE_NAME[2];
newObjectStore = db.createObjectStore(STATS_STORE_NAME,
{ keyPath: ["appId", "isInBrowser", "serviceType",
"network", "timestamp"] });
newObjectStore.createIndex("network", "network", { unique: false });
newObjectStore.createIndex("serviceType", "serviceType", { unique: false });
// Copy records from the current object store to the new one.
objectStore = aTransaction.objectStore(deprecatedName);
objectStore.openCursor().onsuccess = function (event) {
let cursor = event.target.result;
if (!cursor) {
db.deleteObjectStore(deprecatedName);
// upgrade8to9 completed now.
return;
}
let newStats = cursor.value;
// Augment records by adding the new isInBrowser attribute.
// Notes:
// 1. Key value cannot be boolean type. Use 1/0 instead of true/false.
// 2. Most traffic of system app should come from its browser iframe,
// thus assign isInBrowser as 1 for system app.
let manifestURL = appsService.getManifestURLByLocalId(newStats.appId);
if (manifestURL && manifestURL.search(/app:\/\/system\./) === 0) {
newStats.isInBrowser = 1;
} else {
newStats.isInBrowser = 0;
}
newObjectStore.put(newStats);
cursor.continue();
};
}
];
let index = aOldVersion;
let outer = this;
function upgradeNextVersion() {
if (index == aNewVersion) {
debug("Upgrade finished.");
return;
}
try {
var i = index++;
if (DEBUG) debug("Upgrade step: " + i + "\n");
upgradeSteps[i].call(outer);
} catch (ex) {
dump("Caught exception " + ex);
throw ex;
return;
}
}
if (aNewVersion > upgradeSteps.length) {
debug("No migration steps for the new version!");
aTransaction.abort();
return;
}
upgradeNextVersion();
},
importData: function importData(aStats) {
let stats = { appId: aStats.appId,
isInBrowser: aStats.isInBrowser ? 1 : 0,
serviceType: aStats.serviceType,
network: [aStats.networkId, aStats.networkType],
timestamp: aStats.timestamp,
rxBytes: aStats.rxBytes,
txBytes: aStats.txBytes,
rxSystemBytes: aStats.rxSystemBytes,
txSystemBytes: aStats.txSystemBytes,
rxTotalBytes: aStats.rxTotalBytes,
txTotalBytes: aStats.txTotalBytes };
return stats;
},
exportData: function exportData(aStats) {
let stats = { appId: aStats.appId,
isInBrowser: aStats.isInBrowser ? true : false,
serviceType: aStats.serviceType,
networkId: aStats.network[0],
networkType: aStats.network[1],
timestamp: aStats.timestamp,
rxBytes: aStats.rxBytes,
txBytes: aStats.txBytes,
rxTotalBytes: aStats.rxTotalBytes,
txTotalBytes: aStats.txTotalBytes };
return stats;
},
normalizeDate: function normalizeDate(aDate) {
// Convert to UTC according to timezone and
// filter timestamp to get SAMPLE_RATE precission
let timestamp = aDate.getTime() - aDate.getTimezoneOffset() * 60 * 1000;
timestamp = Math.floor(timestamp / SAMPLE_RATE) * SAMPLE_RATE;
return timestamp;
},
saveStats: function saveStats(aStats, aResultCb) {
let isAccumulative = aStats.isAccumulative;
let timestamp = this.normalizeDate(aStats.date);
let stats = { appId: aStats.appId,
isInBrowser: aStats.isInBrowser,
serviceType: aStats.serviceType,
networkId: aStats.networkId,
networkType: aStats.networkType,
timestamp: timestamp,
rxBytes: isAccumulative ? 0 : aStats.rxBytes,
txBytes: isAccumulative ? 0 : aStats.txBytes,
rxSystemBytes: isAccumulative ? aStats.rxBytes : 0,
txSystemBytes: isAccumulative ? aStats.txBytes : 0,
rxTotalBytes: isAccumulative ? aStats.rxBytes : 0,
txTotalBytes: isAccumulative ? aStats.txBytes : 0 };
stats = this.importData(stats);
this.dbNewTxn(STATS_STORE_NAME, "readwrite", function(aTxn, aStore) {
if (DEBUG) {
debug("Filtered time: " + new Date(timestamp));
debug("New stats: " + JSON.stringify(stats));
}
let lowerFilter = [stats.appId, stats.isInBrowser, stats.serviceType,
stats.network, 0];
let upperFilter = [stats.appId, stats.isInBrowser, stats.serviceType,
stats.network, ""];
let range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
let request = aStore.openCursor(range, 'prev');
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (!cursor) {
// Empty, so save first element.
if (!isAccumulative) {
this._saveStats(aTxn, aStore, stats);
return;
}
// There could be a time delay between the point when the network
// interface comes up and the point when the database is initialized.
// In this short interval some traffic data are generated but are not
// registered by the first sample.
stats.rxBytes = stats.rxTotalBytes;
stats.txBytes = stats.txTotalBytes;
// However, if the interface is not switched on after the database is
// initialized (dual sim use case) stats should be set to 0.
let req = aStore.index("network").openKeyCursor(null, "nextunique");
req.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
if (cursor.key[1] == stats.network[1]) {
stats.rxBytes = 0;
stats.txBytes = 0;
this._saveStats(aTxn, aStore, stats);
return;
}
cursor.continue();
return;
}
this._saveStats(aTxn, aStore, stats);
}.bind(this);
return;
}
// There are old samples
if (DEBUG) {
debug("Last value " + JSON.stringify(cursor.value));
}
// Remove stats previous to now - VALUE_MAX_LENGTH
this._removeOldStats(aTxn, aStore, stats.appId, stats.isInBrowser,
stats.serviceType, stats.network, stats.timestamp);
// Process stats before save
this._processSamplesDiff(aTxn, aStore, cursor, stats, isAccumulative);
}.bind(this);
}.bind(this), aResultCb);
},
/*
* This function check that stats are saved in the database following the sample rate.
* In this way is easier to find elements when stats are requested.
*/
_processSamplesDiff: function _processSamplesDiff(aTxn,
aStore,
aLastSampleCursor,
aNewSample,
aIsAccumulative) {
let lastSample = aLastSampleCursor.value;
// Get difference between last and new sample.
let diff = (aNewSample.timestamp - lastSample.timestamp) / SAMPLE_RATE;
if (diff % 1) {
// diff is decimal, so some error happened because samples are stored as a multiple
// of SAMPLE_RATE
aTxn.abort();
throw new Error("Error processing samples");
}
if (DEBUG) {
debug("New: " + aNewSample.timestamp + " - Last: " +
lastSample.timestamp + " - diff: " + diff);
}
// If the incoming data has a accumulation feature, the new
// |txBytes|/|rxBytes| is assigend by differnces between the new
// |txTotalBytes|/|rxTotalBytes| and the last |txTotalBytes|/|rxTotalBytes|.
// Else, if incoming data is non-accumulative, the |txBytes|/|rxBytes|
// is the new |txBytes|/|rxBytes|.
let rxDiff = 0;
let txDiff = 0;
if (aIsAccumulative) {
rxDiff = aNewSample.rxSystemBytes - lastSample.rxSystemBytes;
txDiff = aNewSample.txSystemBytes - lastSample.txSystemBytes;
if (rxDiff < 0 || txDiff < 0) {
rxDiff = aNewSample.rxSystemBytes;
txDiff = aNewSample.txSystemBytes;
}
aNewSample.rxBytes = rxDiff;
aNewSample.txBytes = txDiff;
aNewSample.rxTotalBytes = lastSample.rxTotalBytes + rxDiff;
aNewSample.txTotalBytes = lastSample.txTotalBytes + txDiff;
} else {
rxDiff = aNewSample.rxBytes;
txDiff = aNewSample.txBytes;
}
if (diff == 1) {
// New element.
// If the incoming data is non-accumulative, the new
// |rxTotalBytes|/|txTotalBytes| needs to be updated by adding new
// |rxBytes|/|txBytes| to the last |rxTotalBytes|/|txTotalBytes|.
if (!aIsAccumulative) {
aNewSample.rxTotalBytes = aNewSample.rxBytes + lastSample.rxTotalBytes;
aNewSample.txTotalBytes = aNewSample.txBytes + lastSample.txTotalBytes;
}
this._saveStats(aTxn, aStore, aNewSample);
return;
}
if (diff > 1) {
// Some samples lost. Device off during one or more samplerate periods.
// Time or timezone changed
// Add lost samples with 0 bytes and the actual one.
if (diff > VALUES_MAX_LENGTH) {
diff = VALUES_MAX_LENGTH;
}
let data = [];
for (let i = diff - 2; i >= 0; i--) {
let time = aNewSample.timestamp - SAMPLE_RATE * (i + 1);
let sample = { appId: aNewSample.appId,
isInBrowser: aNewSample.isInBrowser,
serviceType: aNewSample.serviceType,
network: aNewSample.network,
timestamp: time,
rxBytes: 0,
txBytes: 0,
rxSystemBytes: lastSample.rxSystemBytes,
txSystemBytes: lastSample.txSystemBytes,
rxTotalBytes: lastSample.rxTotalBytes,
txTotalBytes: lastSample.txTotalBytes };
data.push(sample);
}
data.push(aNewSample);
this._saveStats(aTxn, aStore, data);
return;
}
if (diff == 0 || diff < 0) {
// New element received before samplerate period. It means that device has
// been restarted (or clock / timezone change).
// Update element. If diff < 0, clock or timezone changed back. Place data
// in the last sample.
// Old |rxTotalBytes|/|txTotalBytes| needs to get updated by adding the
// last |rxTotalBytes|/|txTotalBytes|.
lastSample.rxBytes += rxDiff;
lastSample.txBytes += txDiff;
lastSample.rxSystemBytes = aNewSample.rxSystemBytes;
lastSample.txSystemBytes = aNewSample.txSystemBytes;
lastSample.rxTotalBytes += rxDiff;
lastSample.txTotalBytes += txDiff;
if (DEBUG) {
debug("Update: " + JSON.stringify(lastSample));
}
let req = aLastSampleCursor.update(lastSample);
}
},
_saveStats: function _saveStats(aTxn, aStore, aNetworkStats) {
if (DEBUG) {
debug("_saveStats: " + JSON.stringify(aNetworkStats));
}
if (Array.isArray(aNetworkStats)) {
let len = aNetworkStats.length - 1;
for (let i = 0; i <= len; i++) {
aStore.put(aNetworkStats[i]);
}
} else {
aStore.put(aNetworkStats);
}
},
_removeOldStats: function _removeOldStats(aTxn, aStore, aAppId, aIsInBrowser,
aServiceType, aNetwork, aDate) {
// Callback function to remove old items when new ones are added.
let filterDate = aDate - (SAMPLE_RATE * VALUES_MAX_LENGTH - 1);
let lowerFilter = [aAppId, aIsInBrowser, aServiceType, aNetwork, 0];
let upperFilter = [aAppId, aIsInBrowser, aServiceType, aNetwork, filterDate];
let range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
let lastSample = null;
let self = this;
aStore.openCursor(range).onsuccess = function(event) {
var cursor = event.target.result;
if (cursor) {
lastSample = cursor.value;
cursor.delete();
cursor.continue();
return;
}
// If all samples for a network are removed, an empty sample
// has to be saved to keep the totalBytes in order to compute
// future samples because system counters are not set to 0.
// Thus, if there are no samples left, the last sample removed
// will be saved again after setting its bytes to 0.
let request = aStore.index("network").openCursor(aNetwork);
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (!cursor && lastSample != null) {
let timestamp = new Date();
timestamp = self.normalizeDate(timestamp);
lastSample.timestamp = timestamp;
lastSample.rxBytes = 0;
lastSample.txBytes = 0;
self._saveStats(aTxn, aStore, lastSample);
}
};
};
},
clearInterfaceStats: function clearInterfaceStats(aNetwork, aResultCb) {
let network = [aNetwork.network.id, aNetwork.network.type];
let self = this;
// Clear and save an empty sample to keep sync with system counters
this.dbNewTxn(STATS_STORE_NAME, "readwrite", function(aTxn, aStore) {
let sample = null;
let request = aStore.index("network").openCursor(network, "prev");
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
if (!sample && cursor.value.appId == 0) {
sample = cursor.value;
}
cursor.delete();
cursor.continue();
return;
}
if (sample) {
let timestamp = new Date();
timestamp = self.normalizeDate(timestamp);
sample.timestamp = timestamp;
sample.appId = 0;
sample.isInBrowser = 0;
sample.serviceType = "";
sample.rxBytes = 0;
sample.txBytes = 0;
sample.rxTotalBytes = 0;
sample.txTotalBytes = 0;
self._saveStats(aTxn, aStore, sample);
}
};
}, this._resetAlarms.bind(this, aNetwork.networkId, aResultCb));
},
clearStats: function clearStats(aNetworks, aResultCb) {
let index = 0;
let stats = [];
let self = this;
let callback = function(aError, aResult) {
index++;
if (!aError && index < aNetworks.length) {
self.clearInterfaceStats(aNetworks[index], callback);
return;
}
aResultCb(aError, aResult);
};
if (!aNetworks[index]) {
aResultCb(null, true);
return;
}
this.clearInterfaceStats(aNetworks[index], callback);
},
getCurrentStats: function getCurrentStats(aNetwork, aDate, aResultCb) {
if (DEBUG) {
debug("Get current stats for " + JSON.stringify(aNetwork) + " since " + aDate);
}
let network = [aNetwork.id, aNetwork.type];
if (aDate) {
this._getCurrentStatsFromDate(network, aDate, aResultCb);
return;
}
this._getCurrentStats(network, aResultCb);
},
_getCurrentStats: function _getCurrentStats(aNetwork, aResultCb) {
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(txn, store) {
let request = null;
let upperFilter = [0, 1, "", aNetwork, Date.now()];
let range = IDBKeyRange.upperBound(upperFilter, false);
let result = { rxBytes: 0, txBytes: 0,
rxTotalBytes: 0, txTotalBytes: 0 };
request = store.openCursor(range, "prev");
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
result.rxBytes = result.rxTotalBytes = cursor.value.rxTotalBytes;
result.txBytes = result.txTotalBytes = cursor.value.txTotalBytes;
}
txn.result = result;
};
}.bind(this), aResultCb);
},
_getCurrentStatsFromDate: function _getCurrentStatsFromDate(aNetwork, aDate, aResultCb) {
aDate = new Date(aDate);
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(txn, store) {
let request = null;
let start = this.normalizeDate(aDate);
let upperFilter = [0, 1, "", aNetwork, Date.now()];
let range = IDBKeyRange.upperBound(upperFilter, false);
let result = { rxBytes: 0, txBytes: 0,
rxTotalBytes: 0, txTotalBytes: 0 };
request = store.openCursor(range, "prev");
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
result.rxBytes = result.rxTotalBytes = cursor.value.rxTotalBytes;
result.txBytes = result.txTotalBytes = cursor.value.txTotalBytes;
}
let timestamp = cursor.value.timestamp;
let range = IDBKeyRange.lowerBound(lowerFilter, false);
request = store.openCursor(range);
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
if (cursor.value.timestamp == timestamp) {
// There is one sample only.
result.rxBytes = cursor.value.rxBytes;
result.txBytes = cursor.value.txBytes;
} else {
result.rxBytes -= cursor.value.rxTotalBytes;
result.txBytes -= cursor.value.txTotalBytes;
}
}
txn.result = result;
};
};
}.bind(this), aResultCb);
},
find: function find(aResultCb, aAppId, aBrowsingTrafficOnly, aServiceType,
aNetwork, aStart, aEnd, aAppManifestURL) {
let offset = (new Date()).getTimezoneOffset() * 60 * 1000;
let start = this.normalizeDate(aStart);
let end = this.normalizeDate(aEnd);
if (DEBUG) {
debug("Find samples for appId: " + aAppId +
" browsingTrafficOnly: " + aBrowsingTrafficOnly +
" serviceType: " + aServiceType +
" network: " + JSON.stringify(aNetwork) + " from " + start +
" until " + end);
debug("Start time: " + new Date(start));
debug("End time: " + new Date(end));
}
// Find samples of browsing traffic (isInBrowser = 1) first since they are
// needed no matter browsingTrafficOnly is true or false.
// We have to make two queries to database because we cannot filter correct
// records by a single query that sets ranges for two keys (isInBrowser and
// timestamp). We think it is because the keyPath contains an array
// (network) so such query does not work.
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(aTxn, aStore) {
let network = [aNetwork.id, aNetwork.type];
let lowerFilter = [aAppId, 1, aServiceType, network, start];
let upperFilter = [aAppId, 1, aServiceType, network, end];
let range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
let data = [];
if (!aTxn.result) {
aTxn.result = {};
}
aTxn.result.appManifestURL = aAppManifestURL;
aTxn.result.browsingTrafficOnly = aBrowsingTrafficOnly;
aTxn.result.serviceType = aServiceType;
aTxn.result.network = aNetwork;
aTxn.result.start = aStart;
aTxn.result.end = aEnd;
let request = aStore.openCursor(range).onsuccess = function(event) {
var cursor = event.target.result;
if (cursor){
// We use rxTotalBytes/txTotalBytes instead of rxBytes/txBytes for
// the first (oldest) sample. The rx/txTotalBytes fields record
// accumulative usage amount, which means even if old samples were
// expired and removed from the Database, we can still obtain the
// correct network usage.
if (data.length == 0) {
data.push({ rxBytes: cursor.value.rxTotalBytes,
txBytes: cursor.value.txTotalBytes,
date: new Date(cursor.value.timestamp + offset) });
} else {
data.push({ rxBytes: cursor.value.rxBytes,
txBytes: cursor.value.txBytes,
date: new Date(cursor.value.timestamp + offset) });
}
cursor.continue();
return;
}
if (aBrowsingTrafficOnly) {
this.fillResultSamples(start + offset, end + offset, data);
aTxn.result.data = data;
return;
}
// Find samples of app traffic (isInBrowser = 0) as well if
// browsingTrafficOnly is false.
lowerFilter = [aAppId, 0, aServiceType, network, start];
upperFilter = [aAppId, 0, aServiceType, network, end];
range = IDBKeyRange.bound(lowerFilter, upperFilter, false, false);
request = aStore.openCursor(range).onsuccess = function(event) {
cursor = event.target.result;
if (cursor) {
var date = new Date(cursor.value.timestamp + offset);
var foundData = data.find(function (element, index, array) {
if (element.date.getTime() !== date.getTime()) {
return false;
}
return element;
}, date);
if (foundData) {
foundData.rxBytes += cursor.value.rxBytes;
foundData.txBytes += cursor.value.txBytes;
} else {
// We use rxTotalBytes/txTotalBytes instead of rxBytes/txBytes
// for the first (oldest) sample. The rx/txTotalBytes fields
// record accumulative usage amount, which means even if old
// samples were expired and removed from the Database, we can
// still obtain the correct network usage.
if (data.length == 0) {
data.push({ rxBytes: cursor.value.rxTotalBytes,
txBytes: cursor.value.txTotalBytes,
date: new Date(cursor.value.timestamp + offset) });
} else {
data.push({ rxBytes: cursor.value.rxBytes,
txBytes: cursor.value.txBytes,
date: new Date(cursor.value.timestamp + offset) });
}
}
cursor.continue();
return;
}
this.fillResultSamples(start + offset, end + offset, data);
aTxn.result.data = data;
}.bind(this); // openCursor(range).onsuccess() callback
}.bind(this); // openCursor(range).onsuccess() callback
}.bind(this), aResultCb);
},
/*
* Fill data array (samples from database) with empty samples to match
* requested start / end dates.
*/
fillResultSamples: function fillResultSamples(aStart, aEnd, aData) {
if (aData.length == 0) {
aData.push({ rxBytes: undefined,
txBytes: undefined,
date: new Date(aStart) });
}
while (aStart < aData[0].date.getTime()) {
aData.unshift({ rxBytes: undefined,
txBytes: undefined,
date: new Date(aData[0].date.getTime() - SAMPLE_RATE) });
}
while (aEnd > aData[aData.length - 1].date.getTime()) {
aData.push({ rxBytes: undefined,
txBytes: undefined,
date: new Date(aData[aData.length - 1].date.getTime() + SAMPLE_RATE) });
}
},
getAvailableNetworks: function getAvailableNetworks(aResultCb) {
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(aTxn, aStore) {
if (!aTxn.result) {
aTxn.result = [];
}
let request = aStore.index("network").openKeyCursor(null, "nextunique");
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
aTxn.result.push({ id: cursor.key[0],
type: cursor.key[1] });
cursor.continue();
return;
}
};
}, aResultCb);
},
isNetworkAvailable: function isNetworkAvailable(aNetwork, aResultCb) {
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(aTxn, aStore) {
if (!aTxn.result) {
aTxn.result = false;
}
let network = [aNetwork.id, aNetwork.type];
let request = aStore.index("network").openKeyCursor(IDBKeyRange.only(network));
request.onsuccess = function onsuccess(event) {
if (event.target.result) {
aTxn.result = true;
}
};
}, aResultCb);
},
getAvailableServiceTypes: function getAvailableServiceTypes(aResultCb) {
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(aTxn, aStore) {
if (!aTxn.result) {
aTxn.result = [];
}
let request = aStore.index("serviceType").openKeyCursor(null, "nextunique");
request.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor && cursor.key != "") {
aTxn.result.push({ serviceType: cursor.key });
cursor.continue();
return;
}
};
}, aResultCb);
},
get sampleRate () {
return SAMPLE_RATE;
},
get maxStorageSamples () {
return VALUES_MAX_LENGTH;
},
logAllRecords: function logAllRecords(aResultCb) {
this.dbNewTxn(STATS_STORE_NAME, "readonly", function(aTxn, aStore) {
aStore.mozGetAll().onsuccess = function onsuccess(event) {
aTxn.result = event.target.result;
};
}, aResultCb);
},
alarmToRecord: function alarmToRecord(aAlarm) {
let record = { networkId: aAlarm.networkId,
absoluteThreshold: aAlarm.absoluteThreshold,
relativeThreshold: aAlarm.relativeThreshold,
startTime: aAlarm.startTime,
data: aAlarm.data,
manifestURL: aAlarm.manifestURL,
pageURL: aAlarm.pageURL };
if (aAlarm.id) {
record.id = aAlarm.id;
}
return record;
},
recordToAlarm: function recordToalarm(aRecord) {
let alarm = { networkId: aRecord.networkId,
absoluteThreshold: aRecord.absoluteThreshold,
relativeThreshold: aRecord.relativeThreshold,
startTime: aRecord.startTime,
data: aRecord.data,
manifestURL: aRecord.manifestURL,
pageURL: aRecord.pageURL };
if (aRecord.id) {
alarm.id = aRecord.id;
}
return alarm;
},
addAlarm: function addAlarm(aAlarm, aResultCb) {
this.dbNewTxn(ALARMS_STORE_NAME, "readwrite", function(txn, store) {
if (DEBUG) {
debug("Going to add " + JSON.stringify(aAlarm));
}
let record = this.alarmToRecord(aAlarm);
store.put(record).onsuccess = function setResult(aEvent) {
txn.result = aEvent.target.result;
if (DEBUG) {
debug("Request successful. New record ID: " + txn.result);
}
};
}.bind(this), aResultCb);
},
getFirstAlarm: function getFirstAlarm(aNetworkId, aResultCb) {
let self = this;
this.dbNewTxn(ALARMS_STORE_NAME, "readonly", function(txn, store) {
if (DEBUG) {
debug("Get first alarm for network " + aNetworkId);
}
let lowerFilter = [aNetworkId, 0];
let upperFilter = [aNetworkId, ""];
let range = IDBKeyRange.bound(lowerFilter, upperFilter);
store.index("alarm").openCursor(range).onsuccess = function onsuccess(event) {
let cursor = event.target.result;
txn.result = null;
if (cursor) {
txn.result = self.recordToAlarm(cursor.value);
}
};
}, aResultCb);
},
removeAlarm: function removeAlarm(aAlarmId, aManifestURL, aResultCb) {
this.dbNewTxn(ALARMS_STORE_NAME, "readwrite", function(txn, store) {
if (DEBUG) {
debug("Remove alarm " + aAlarmId);
}
store.get(aAlarmId).onsuccess = function onsuccess(event) {
let record = event.target.result;
txn.result = false;
if (!record || (aManifestURL && record.manifestURL != aManifestURL)) {
return;
}
store.delete(aAlarmId);
txn.result = true;
}
}, aResultCb);
},
removeAlarms: function removeAlarms(aManifestURL, aResultCb) {
this.dbNewTxn(ALARMS_STORE_NAME, "readwrite", function(txn, store) {
if (DEBUG) {
debug("Remove alarms of " + aManifestURL);
}
store.index("manifestURL").openCursor(aManifestURL)
.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
cursor.delete();
cursor.continue();
}
}
}, aResultCb);
},
updateAlarm: function updateAlarm(aAlarm, aResultCb) {
let self = this;
this.dbNewTxn(ALARMS_STORE_NAME, "readwrite", function(txn, store) {
if (DEBUG) {
debug("Update alarm " + aAlarm.id);
}
let record = self.alarmToRecord(aAlarm);
store.openCursor(record.id).onsuccess = function onsuccess(event) {
let cursor = event.target.result;
txn.result = false;
if (cursor) {
cursor.update(record);
txn.result = true;
}
}
}, aResultCb);
},
getAlarms: function getAlarms(aNetworkId, aManifestURL, aResultCb) {
let self = this;
this.dbNewTxn(ALARMS_STORE_NAME, "readonly", function(txn, store) {
if (DEBUG) {
debug("Get alarms for " + aManifestURL);
}
txn.result = [];
store.index("manifestURL").openCursor(aManifestURL)
.onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (!cursor) {
return;
}
if (!aNetworkId || cursor.value.networkId == aNetworkId) {
txn.result.push(self.recordToAlarm(cursor.value));
}
cursor.continue();
}
}, aResultCb);
},
_resetAlarms: function _resetAlarms(aNetworkId, aResultCb) {
this.dbNewTxn(ALARMS_STORE_NAME, "readwrite", function(txn, store) {
if (DEBUG) {
debug("Reset alarms for network " + aNetworkId);
}
let lowerFilter = [aNetworkId, 0];
let upperFilter = [aNetworkId, ""];
let range = IDBKeyRange.bound(lowerFilter, upperFilter);
store.index("alarm").openCursor(range).onsuccess = function onsuccess(event) {
let cursor = event.target.result;
if (cursor) {
if (cursor.value.startTime) {
cursor.value.relativeThreshold = cursor.value.threshold;
cursor.update(cursor.value);
}
cursor.continue();
return;
}
};
}, aResultCb);
}
};
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