keycloak logout doesn't invalidate token when call a rest api - jwt

Question

I've a React app that uses Keycloak as a authentication service. Also I've a Nodejs rest api with endpoints secured by keycloak, so the React app sends JWT when needs call an api. In Keycloak admin console I created 1 public client with users and roles.
All works fine, but the only problems is when a I logout through admin console, or
from my React application berfore that expiration time, I still can call to my app with these token.
Why my backend app doesn't validate the token with server?
My node app uses keycloak-node-connect adapter and my keycloak.json is:
{
"client-id": "my-public-client",
"bearer-only": true,
"auth-server-url": "http://localhost:8180/auth",
"realm": "my-realm"
}

Answer 1

Solved
I can solved my probleam like suggested in Keycloak: Access token validation end point
keycloak.config.js
var session = require('express-session');
var Keycloak = require('keycloak-connect');
var request = require('request');
const createError = require('http-errors');
let _keycloak;
var memoryStore = new session.MemoryStore();
function initKeycloak() {
if (_keycloak) {
console.log("Trying to init Keycloak again!");
return _keycloak;
}
else {
console.log("Initializing Keycloak...");
_keycloak = new Keycloak({ store: memoryStore });
return _keycloak;
}
}
function getKeycloak() {
if (!_keycloak) {
console.error('Keycloak has not been initialized. Please called init first.');
}
return _keycloak;
}
async function validateTokenKeycloak(req, res, next) {
if (req.kauth && req.kauth.grant) {
console.log('--- Verify token ---');
try {
var result = await _keycloak.grantManager.userInfo(req.kauth.grant.access_token);
//var result = await _keycloak.grantManager.validateAccessToken(req.kauth.grant.access_token);
if(!result) {
console.log(`result:`, result);
throw Error('Invalid Token');
}
} catch (error) {
console.log(`Error: ${error.message}`);
return next(createError.Unauthorized());
}
}
next();
}
module.exports = {
memoryStore,
initKeycloak,
getKeycloak,
validateTokenKeycloak
};
app.js
const express = require('express');
const createError = require('http-errors');
const dotenv = require('dotenv').config();
const session = require('express-session');
const keycloakConfig = require('./config/keycloak.config');
const app = express();
// Keycloak
app.use(session({
secret: 'secret',
resave: false,
saveUninitialized: true,
store: keycloakConfig.memoryStore
}));
const keycloak = keycloakConfig.initKeycloak();
app.use(keycloak.middleware());
app.use(keycloakConfig.validateTokenKeycloak);
app.use("/health", require('./routes/health.route'));
// 404 handler and pass to error handler
app.use((req, res, next) => {
next(createError(404, 'Not found'));
});
// Error Handler
app.use((err, req, res, next) => {
res.status(err.status || 500);
res.send({
error : {
status : err.status || 500,
message : err.message
}
});
});
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
console.log(`Server starter on port ${PORT}`);
});