keycloack-js-util

User frindly js library for authentication with Keycloak.

``
npm install keycloak-js-util
`

⭐️ Features

- async library
- basic login
- easy to use async fetch wrappers that add authorization bearer token header
- tested
- Correct keyclock CORS and CSP(content security policy) configuration:
https://github.com/shimondoodkin/keycloak-js-util/tree/master/example/config
- Correct krakend (CORS) configuration:
https://github.com/shimondoodkin/keycloak-js-util/blob/master/example/krakend.json

✅ running the example:

there is an example at https://github.com/shimondoodkin/keycloak-js-util/tree/master/example
- you need to have doker installed.
- git clone https://github.com/shimondoodkin/keycloak-js-util.git
- in the example folder:
- run all bat files:
- run-krakend-docker.bat
- run-keycloack-docker.bat
- run-server.bat or python3 server.py or node server.js
- run-vue-app.bat or enter folder: example\vue-app and run: npm run dev
- configure keycloak like described in https://github.com/shimondoodkin/keycloak-js-util/tree/master/example/config ( describes how to overcome CORS and content security policy issues with keycloak) open key cloak at http://localhost:8080
- try login to http://localhost:8081

Example 1

`javascript

import {authInit,setOnRefreshTokenError,getKeycloak} from 'keycloak-js-util'

try {
await authInit({
url: 'http://localhost:8080/',
realm: 'keycloak-demo',
clientId: 'app-vue',
// onLoad:'login-required',
onLoad: 'check-sso',
silentCheckSsoRedirectUri: window.location.origin + '/silent-check-sso.html'
});

//optionally respont to authenticaation right away with login
if(!getKeycloak().authenticated)
{
// if authentication is failed, try to re-authenticate. don't load the application.
//
// if onLoad:'login-required' is used then maybe refresh window.location.reload().
// or call getKeycloak().login()

console.log('not authorized')
getKeycloak().login()

}
else
{
// authenticated successfuly, load the application

// add handler for refresh token error
setOnRefreshTokenError((error) => {
// for example:
// alert("dispaly message you have been disconnected.\n"+error.message);
// window.location.reload();
});

// load application here
// for example
// createApp(App).mount('#app');
}
}
catch(e)
{
console.error(e)
// display error message
// for example
// createApp(ErrorPage,{
// title: 'Application initialization error:',
// message: e.message,
// returnUrl: '/',
// }).mount('#app');
}
`

Silent SSO:
To enable the silent check-sso, you have to provide a silentCheckSsoRedirectUri attribute in the init method. This URI needs to be a valid endpoint in the application (and of course it must be configured as a valid redirect for the client in the Keycloak Admin Console):
`javascript
const authenticated=await authInit({
url: 'http://localhost:8080/',
realm: 'keycloak-demo', clientId: 'app-vue',
onLoad: 'check-sso',
silentCheckSsoRedirectUri: window.location.origin + '/silent-check-sso.html' });
`

The page at the silent check-sso redirect uri is loaded in the iframe after successfully checking your authentication state and retrieving the tokens from the Keycloak server. It has no other task than sending the received tokens to the main application and should only look like this:

`html





`

Example 2

`javascript


import {authFetchText,authFetchJSON,authFetch} from 'keycloak-js-util'

const data = await authFetchText('http://localhost:8082/v1/test.txt')
const data = await authFetchJSON('http://localhost:8082/v1/test.json')
const data = await authFetchBlob('http://localhost:8082/v1/test.jpg')


const response = await authFetch('http://localhost:8082/v1/test')
if(!response.ok)
throw new Error('Http status code='+response.code)
const data = await response.json()


`

in keycloak there are many useful functions, see documentation:

`javascript
// keycloak-js:
// reference: https://www.keycloak.org/docs/latest/securing_apps/index.html#_javascript_adapter
// source code of keycloak-js: https://github.com/keycloak/keycloak/tree/main/js/libs/keycloak-js
// npm pakcage: https://www.npmjs.com/package/keycloak-js
`

list of methods of keycloak instance:

`javascript
keycloak.init(options) // redirects if onLoad:'login-required'
keycloak.login(options) // redirects
keycloak.createLoginUrl(options)
keycloak.logout(options) // redirects
keycloak.createLogoutUrl(options)
keycloak.register(options) // redirects
keycloak.createRegisterUrl(options)
keycloak.accountManagement() // redirects
keycloak.createAccountUrl(options)
keycloak.hasRealmRole(role)
keycloak.hasResourceRole(role, resource)
keycloak.loadUserProfile()
keycloak.isTokenExpired(minValidity)
keycloak.updateToken(minValidity)
keycloak.clearToken()
`

list of properties of keycloak instance:
`javascript
keycloak.authenticated
keycloak.token
keycloak.tokenParsed
keycloak.subject
keycloak.idToken
keycloak.idTokenParsed
keycloak.realmAccess
keycloak.resourceAccess
keycloak.refreshToken
keycloak.refreshTokenParsed
keycloak.timeSkew
keycloak.responseMode
keycloak.flow
keycloak.adapter
keycloak.responseType
``

Written by Shimon Doodkin