8000 Clear all entries stored in local storage by jonkoops · Pull Request #34056 · keycloak/keycloak · GitHub
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Clear all entries stored in local storage #34056

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Merged
jonkoops merged 1 commit into from
Oct 17, 2024
Merged

Clear all entries stored in local storage #34056

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73 changes: 50 additions & 23 deletions js/libs/keycloak-js/lib/keycloak.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1589,6 +1589,8 @@ function Keycloak (config) {
throw 'invalid adapter type: ' + type;
}

const STORAGE_KEY_PREFIX = 'kc-callback-';

var LocalStorage = function() {
if (!(this instanceof LocalStorage)) {
return new LocalStorage();
Expand All @@ -1599,46 +1601,71 @@ function Keycloak (config) {

var cs = this;

function clearExpired() {
var time = new Date().getTime();
for (var i = 0; i < localStorage.length; i++) {
var key = localStorage.key(i);
if (key && key.indexOf('kc-callback-') == 0) {
var value = localStorage.getItem(key);
if (value) {
try {
var expires = JSON.parse(value).expires;
if (!expires || expires < time) {
localStorage.removeItem(key);
}
} catch (err) {
localStorage.removeItem(key);
}
}
/**
* Clears all values from local storage that are no longer valid.
*/
function clearInvalidValues() {
const currentTime = Date.now();

for (const [key, value] of Object.entries(localStorage)) {
// Ignore values not known to be stored by us.
if (!key.startsWith(STORAGE_KEY_PREFIX)) {
continue;
}

// Attempt to parse the expiry time from the value.
const expiry = parseExpiry(value);

// Discard the value if it is malformed or expired.
if (expiry === null || expiry < currentTime) {
localStorage.removeItem(key);
}
}
}

/**
* Parses the expiry time from a value stored in local storage.
* @param {unknown} value
* @returns {number | null} The expiry time in milliseconds, or `null` if the value is malformed.
*/
function parseExpiry(value) {
let parsedValue;

// Attempt to parse the value as JSON.
try {
parsedValue = JSON.parse(value);
} catch (error) {
return null;
}

// Attempt to extract the 'expires' property.
if (isObject(parsedValue) && 'expires' in parsedValue && typeof parsedValue.expires === 'number') {
return parsedValue.expires;
}

return null;
}

cs.get = function(state) {
if (!state) {
return;
}

var key = 'kc-callback-' + state;
var key = STORAGE_KEY_PREFIX + state;
var value = localStorage.getItem(key);
if (value) {
localStorage.removeItem(key);
value = JSON.parse(value);
}

clearExpired();
clearInvalidValues();
return value;
};

cs.add = function(state) {
clearExpired();
clearInvalidValues();

var key = 'kc-callback-' + state.state;
var key = STORAGE_KEY_PREFIX + state.state;
state.expires = new Date().getTime() + (60 * 60 * 1000);
localStorage.setItem(key, JSON.stringify(state));
};
Expand All @@ -1656,15 +1683,15 @@ function Keycloak (config) {
return;
}

var value = getCookie('kc-callback-' + state);
setCookie('kc-callback-' + state, '', cookieExpiration(-100));
var value = getCookie(STORAGE_KEY_PREFIX + state);
setCookie(STORAGE_KEY_PREFIX + state, '', cookieExpiration(-100));
if (value) {
return JSON.parse(value);
}
};

cs.add = function(state) {
setCookie('kc-callback-' + state.state, JSON.stringify(state), cookieExpiration(60));
setCookie(STORAGE_KEY_PREFIX + state.state, JSON.stringify(state), cookieExpiration(60));
};

cs.removeItem = function(key) {
Expand Down
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