keycloak_js_typescript_adapter_init_with_token_refresh.ts

1import Keycloak from 'keycloak-js';
2
3// Configuration for the Keycloak instance
4const keycloakConfig = {
5    url: 'http://localhost:8080',
6    realm: 'myrealm',
7    clientId: 'myclient'
8};
9
10// Initialize the Keycloak instance
11const keycloak: Keycloak = new Keycloak(keycloakConfig);
12
13/**
14 * Initializes Keycloak and handles the authentication state.
15 * 'onLoad: "login-required"' will redirect the user to the Keycloak login page if not authenticated.
16 */
17async function initKeycloak() {
18    try {
19        const authenticated = await keycloak.init({
20            onLoad: 'login-required',
21            checkLoginIframe: false
22        });
23
24        if (authenticated) {
25            console.log("User is authenticated");
26            console.log("Token:", keycloak.token);
27            
28            // Example: Accessing user profile information
29            const profile = await keycloak.loadUserProfile();
30            console.log("User Profile:", profile);
31        } else {
32            console.warn("User is not authenticated");
33        }
34    } catch (error) {
35        console.error("Failed to initialize Keycloak", error);
36    }
37}
38
39// Function to handle logout
40function logout() {
41    keycloak.logout();
42}
43
44// Function to refresh the token if it is about to expire
45async function refreshToken() {
46    try {
47        const refreshed = await keycloak.updateToken(70); // Refresh if token expires in less than 70 seconds
48        if (refreshed) {
49            console.log('Token successfully refreshed');
50        } else {
51            console.log('Token is still valid');
52        }
53    } catch (error) {
54        console.error('Failed to refresh token', error);
55        keycloak.login();
56    }
57}
58
59// Start the initialization process
60initKeycloak();