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userId: check any consent (not just GDPR) for changes when deciding i…
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…f a stored ID needs to be refreshed
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@dgirardi
dgirardi committed Jul 27, 2023
1 parent 3f49f21 commit 6f47071
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Showing 5 changed files with 82 additions and 136 deletions.
135 changes: 40 additions & 95 deletions modules/userId/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -130,7 +130,7 @@ import {find, includes} from '../../src/polyfill.js';
import {config} from '../../src/config.js';
import * as events from '../../src/events.js';
import {getGlobal} from '../../src/prebidGlobal.js';
import adapterManager, {gdprDataHandler, gppDataHandler} from '../../src/adapterManager.js';
import adapterManager, {gdprDataHandler} from '../../src/adapterManager.js';
import CONSTANTS from '../../src/constants.json';
import {module, ready as hooksReady} from '../../src/hook.js';
import {buildEidPermissions, createEidsArray, EID_CONFIG} from './eids.js';
Expand All @@ -141,7 +141,6 @@ import {
STORAGE_TYPE_LOCALSTORAGE
} from '../../src/storageManager.js';
import {
cyrb53Hash,
deepAccess,
deepSetValue,
delayExecution,
Expand All @@ -162,7 +161,7 @@ import {defer, GreedyPromise} from '../../src/utils/promise.js';
import {registerOrtbProcessor, REQUEST} from '../../src/pbjsORTB.js';
import {newMetrics, timedAuctionHook, useMetrics} from '../../src/utils/perfMetrics.js';
import {findRootDomain} from '../../src/fpd/rootDomain.js';
import {GDPR_GVLIDS} from '../../src/consentHandler.js';
import {allConsent, GDPR_GVLIDS} from '../../src/consentHandler.js';
import {MODULE_TYPE_UID} from '../../src/activities/modules.js';
import {isActivityAllowed} from '../../src/activities/rules.js';
import {ACTIVITY_ENRICH_EIDS} from '../../src/activities/activities.js';
Expand All @@ -173,10 +172,6 @@ const COOKIE = STORAGE_TYPE_COOKIES;
const LOCAL_STORAGE = STORAGE_TYPE_LOCALSTORAGE;
const DEFAULT_SYNC_DELAY = 500;
const NO_AUCTION_DELAY = 0;
const CONSENT_DATA_COOKIE_STORAGE_CONFIG = {
name: '_pbjs_userid_consent_data',
expires: 30 // 30 days expiration, which should match how often consent is refreshed by CMPs
};
export const PBJS_USER_ID_OPTOUT_NAME = '_pbjs_id_optout';
export const coreStorage = getCoreStorageManager('userId');
export const dep = {
Expand Down Expand Up @@ -261,11 +256,13 @@ export function setStoredValue(submodule, value) {
if (storage.type === COOKIE) {
const setCookie = cookieSetter(submodule);
setCookie(null, valueStr, expiresStr);
setCookie('_cst', getConsentHash(), expiresStr);
if (typeof storage.refreshInSeconds === 'number') {
setCookie('_last', new Date().toUTCString(), expiresStr);
}
} else if (storage.type === LOCAL_STORAGE) {
mgr.setDataInLocalStorage(`${storage.name}_exp`, expiresStr);
mgr.setDataInLocalStorage(`${storage.name}_cst`, getConsentHash());
mgr.setDataInLocalStorage(storage.name, encodeURIComponent(valueStr));
if (typeof storage.refreshInSeconds === 'number') {
mgr.setDataInLocalStorage(`${storage.name}_last`, new Date().toUTCString());
Expand All @@ -283,11 +280,11 @@ export function deleteStoredValue(submodule) {
const setCookie = cookieSetter(submodule, coreStorage);
const expiry = (new Date(Date.now() - 1000 * 60 * 60 * 24)).toUTCString();
deleter = (suffix) => setCookie(suffix, '', expiry)
suffixes = ['', '_last'];
suffixes = ['', '_last', '_cst'];
break;
case LOCAL_STORAGE:
deleter = (suffix) => coreStorage.removeDataFromLocalStorage(submodule.config.storage.name + suffix)
suffixes = ['', '_last', '_exp'];
suffixes = ['', '_last', '_exp', '_cst'];
break;
}
if (deleter) {
Expand Down Expand Up @@ -342,70 +339,6 @@ function getStoredValue(submodule, key = undefined) {
return storedValue;
}

/**
* makes an object that can be stored with only the keys we need to check.
* excluding the vendorConsents object since the consentString is enough to know
* if consent has changed without needing to have all the details in an object
* @param consentData
* @returns {{apiVersion: number, gdprApplies: boolean, consentString: string}}
*/
function makeStoredConsentDataHash(consentData) {
const storedConsentData = {
consentString: '',
gdprApplies: false,
apiVersion: 0
};

if (consentData) {
storedConsentData.consentString = consentData.consentString;
storedConsentData.gdprApplies = consentData.gdprApplies;
storedConsentData.apiVersion = consentData.apiVersion;
}

return cyrb53Hash(JSON.stringify(storedConsentData));
}

/**
* puts the current consent data into cookie storage
* @param consentData
*/
export function setStoredConsentData(consentData) {
try {
const expiresStr = (new Date(Date.now() + (CONSENT_DATA_COOKIE_STORAGE_CONFIG.expires * (60 * 60 * 24 * 1000)))).toUTCString();
coreStorage.setCookie(CONSENT_DATA_COOKIE_STORAGE_CONFIG.name, makeStoredConsentDataHash(consentData), expiresStr, 'Lax');
} catch (error) {
logError(error);
}
}

/**
* get the stored consent data from local storage, if any
* @returns {string}
*/
function getStoredConsentData() {
try {
return coreStorage.getCookie(CONSENT_DATA_COOKIE_STORAGE_CONFIG.name);
} catch (e) {
logError(e);
}
}

/**
* test if the consent object stored locally matches the current consent data. if they
* don't match or there is nothing stored locally, it means a refresh of the user id
* submodule is needed
* @param storedConsentData
* @param consentData
* @returns {boolean}
*/
function storedConsentDataMatchesConsentData(storedConsentData, consentData) {
return (
typeof storedConsentData !== 'undefined' &&
storedConsentData !== null &&
storedConsentData === makeStoredConsentDataHash(consentData)
);
}

/**
* @param {SubmoduleContainer[]} submodules
* @param {function} cb - callback for after processing is done.
Expand Down Expand Up @@ -573,18 +506,15 @@ function idSystemInitializer({delay = GreedyPromise.timeout} = {}) {
}
}

function timeGdpr() {
return gdprDataHandler.promise.finally(initMetrics.startTiming('userId.init.gdpr'));
}
function timeGpp() {
return gppDataHandler.promise.finally(initMetrics.startTiming('userId.init.gpp'))
function timeConsent() {
return allConsent.promise.finally(initMetrics.startTiming('userId.init.consent'))
}

let done = cancelAndTry(
GreedyPromise.all([hooksReady, startInit.promise])
.then(() => GreedyPromise.all([timeGdpr(), timeGpp()]).then(([gdpr]) => gdpr))
.then(checkRefs((consentData) => {
initSubmodules(initModules, allModules, consentData);
.then(timeConsent)
.then(checkRefs(() => {
initSubmodules(initModules, allModules);
}))
.then(() => startCallbacks.promise.finally(initMetrics.startTiming('userId.callbacks.pending')))
.then(checkRefs(() => {
Expand Down Expand Up @@ -618,12 +548,11 @@ function idSystemInitializer({delay = GreedyPromise.timeout} = {}) {
done = cancelAndTry(
done
.catch(() => null)
.then(timeGdpr) // fetch again in case a refresh was forced before this was resolved
.then(checkRefs((consentData) => {
.then(timeConsent) // fetch again in case a refresh was forced before this was resolved
.then(checkRefs(() => {
const cbModules = initSubmodules(
initModules,
allModules.filter((sm) => submoduleNames == null || submoduleNames.includes(sm.submodule.name)),
consentData,
true
).filter((sm) => {
return sm.callback != null;
Expand Down Expand Up @@ -812,7 +741,27 @@ function getUserIdsAsync() {
);
}

function populateSubmoduleId(submodule, consentData, storedConsentData, forceRefresh, allSubmodules) {
export function getConsentHash() {
// transform decimal string into base64 to save some space on cookies
let hash = Number(allConsent.hash);
const bytes = [];
while (hash > 0) {
bytes.push(String.fromCharCode(hash & 255));
hash = hash >>> 8;
}
return btoa(bytes.join());
}

function consentChanged(submodule) {
const storedConsent = getStoredValue(submodule, 'cst');
return !storedConsent || storedConsent !== getConsentHash();
}

function populateSubmoduleId(submodule, forceRefresh, allSubmodules) {
// TODO: the ID submodule API only takes GDPR consent; it should be updated now that GDPR
// is only a tiny fraction of a vast consent universe
const gdprConsent = gdprDataHandler.getConsentData();

// There are two submodule configuration types to handle: storage or value
// 1. storage: retrieve user id data from cookie/html storage or with the submodule's getId method
// 2. value: pass directly to bids
Expand All @@ -826,12 +775,12 @@ function populateSubmoduleId(submodule, consentData, storedConsentData, forceRef
refreshNeeded = storedDate && (Date.now() - storedDate.getTime() > submodule.config.storage.refreshInSeconds * 1000);
}

if (!storedId || refreshNeeded || forceRefresh || !storedConsentDataMatchesConsentData(storedConsentData, consentData)) {
if (!storedId || refreshNeeded || forceRefresh || consentChanged(submodule)) {
// No id previously saved, or a refresh is needed, or consent has changed. Request a new id from the submodule.
response = submodule.submodule.getId(submodule.config, consentData, storedId);
response = submodule.submodule.getId(submodule.config, gdprConsent, storedId);
} else if (typeof submodule.submodule.extendId === 'function') {
// If the id exists already, give submodule a chance to decide additional actions that need to be taken
response = submodule.submodule.extendId(submodule.config, consentData, storedId);
response = submodule.submodule.extendId(submodule.config, gdprConsent, storedId);
}

if (isPlainObject(response)) {
Expand All @@ -855,7 +804,7 @@ function populateSubmoduleId(submodule, consentData, storedConsentData, forceRef
// cache decoded value (this is copied to every adUnit bid)
submodule.idObj = submodule.config.value;
} else {
const response = submodule.submodule.getId(submodule.config, consentData, undefined);
const response = submodule.submodule.getId(submodule.config, gdprConsent, undefined);
if (isPlainObject(response)) {
if (typeof response.callback === 'function') { submodule.callback = response.callback; }
if (response.id) { submodule.idObj = submodule.submodule.decode(response.id, submodule.config); }
Expand All @@ -881,7 +830,7 @@ function updatePPID(userIds = getUserIds()) {
}
}

function initSubmodules(dest, submodules, consentData, forceRefresh = false) {
function initSubmodules(dest, submodules, forceRefresh = false) {
return uidMetrics().fork().measureTime('userId.init.modules', function () {
if (!submodules.length) return []; // to simplify log messages from here on

Expand All @@ -901,14 +850,10 @@ function initSubmodules(dest, submodules, consentData, forceRefresh = false) {
return [];
}

// we always want the latest consentData stored, even if we don't execute any submodules
const storedConsentData = getStoredConsentData();
setStoredConsentData(consentData);

const initialized = submodules.reduce((carry, submodule) => {
return submoduleMetrics(submodule.submodule.name).measureTime('init', () => {
try {
populateSubmoduleId(submodule, consentData, storedConsentData, forceRefresh, submodules);
populateSubmoduleId(submodule, forceRefresh, submodules);
carry.push(submodule);
} catch (e) {
logError(`Error in userID module '${submodule.submodule.name}':`, e);
Expand Down
7 changes: 4 additions & 3 deletions src/consentHandler.js
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Original file line number Diff line number Diff line change
Expand Up @@ -185,6 +185,7 @@ export const coppaDataHandler = (() => {
getCoppa,
getConsentData: getCoppa,
getConsentMeta: getCoppa,
reset() {},
get promise() {
return GreedyPromise.resolve(getCoppa())
},
Expand Down Expand Up @@ -213,14 +214,14 @@ export function multiHandler(handlers = ALL_HANDLERS) {
return Object.assign(
{
get promise() {
return Promise.all(handlers.map(([name, handler]) => handler.promise.then(val => [name, val])))
return GreedyPromise.all(handlers.map(([name, handler]) => handler.promise.then(val => [name, val])))
.then(entries => Object.fromEntries(entries));
},
get hash() {
return handlers.map(([_, handler]) => handler.hash).join(':');
return cyrb53Hash(handlers.map(([_, handler]) => handler.hash).join(':'));
}
},
Object.fromEntries(['getConsentData', 'getConsentMeta'].map(n => [n, collector(n)])),
Object.fromEntries(['getConsentData', 'getConsentMeta', 'reset'].map(n => [n, collector(n)])),
)
}

Expand Down
4 changes: 3 additions & 1 deletion test/spec/modules/id5IdSystem_spec.js
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ import {
storeInLocalStorage,
storeNbInCache,
} from 'modules/id5IdSystem.js';
import {coreStorage, init, requestBidsHook, setSubmoduleRegistry} from 'modules/userId/index.js';
import {coreStorage, getConsentHash, init, requestBidsHook, setSubmoduleRegistry} from 'modules/userId/index.js';
import {config} from 'src/config.js';
import * as events from 'src/events.js';
import CONSTANTS from 'src/constants.json';
Expand Down Expand Up @@ -791,13 +791,15 @@ describe('ID5 ID System', function () {
coreStorage.removeDataFromLocalStorage(ID5_STORAGE_NAME);
coreStorage.removeDataFromLocalStorage(`${ID5_STORAGE_NAME}_last`);
coreStorage.removeDataFromLocalStorage(ID5_NB_STORAGE_NAME);
coreStorage.setDataInLocalStorage(ID5_STORAGE_NAME + '_cst', getConsentHash())
adUnits = [getAdUnitMock()];
});
afterEach(function () {
events.getEvents.restore();
coreStorage.removeDataFromLocalStorage(ID5_STORAGE_NAME);
coreStorage.removeDataFromLocalStorage(`${ID5_STORAGE_NAME}_last`);
coreStorage.removeDataFromLocalStorage(ID5_NB_STORAGE_NAME);
coreStorage.removeDataFromLocalStorage(ID5_STORAGE_NAME + '_cst')
sandbox.restore();
});

Expand Down
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