Are you tired of banging your head against the wall trying to get Keycloak Angular SSR login redirection to work? You’re not alone! Many developers have fallen victim to this frustrating issue, but fear not, dear reader, for today we shall embark on a quest to conquer this beast and emerge victorious.
What’s the Problem?
Before we dive into the solution, let’s first understand the problem. When using Keycloak with an Angular application in Server-Side Rendering (SSR) mode, login redirection doesn’t work as expected. You might have configured everything correctly, but upon login, the user is not redirected to the protected resource. Instead, they’re left staring at a blank page or, worse, an error screen.
The Culprit: Angular’s Universal and Keycloak’s Token Validation
The root cause of this issue lies in the way Angular’s Universal module handles server-side rendering and Keycloak’s token validation. In SSR mode, Angular’s Universal module takes over the rendering of the application on the server-side. However, Keycloak’s token validation is tied to the client-side, which creates a mismatch between the two.
The Solution: A Step-by-Step Guide
Fear not, dear reader, for we have a solution! Follow these steps carefully, and you shall be rewarded with a working Keycloak Angular SSR login redirection.
Step 1: Configure Keycloak
First, make sure you have configured Keycloak correctly. You should have a realm, a client, and a valid `keycloak.json` file in your Angular project.
{
"realm": "your-realm",
"auth-server-url": "https://your-keycloak-instance.com/auth",
"ssl-required": "none",
"resource": "your-client",
"credentials": {
"secret": "your-client-secret"
}
}
Step 2: Create a Custom Universal Module
Create a new file `keycloak-universal.module.ts` and add the following code:
import { NgModule } from '@angular/core';
import { KeycloakAngularModule, KeycloakService } from 'keycloak-angular';
import { UniversalModule } from '@angular/platform-server';
@NgModule({
imports: [
KeycloakAngularModule,
UniversalModule
],
providers: [
KeycloakService
]
})
export class KeycloakUniversalModule { }
This module will serve as a bridge between Keycloak and Angular’s Universal module.
Step 3: Update app.server.module.ts
Update your `app.server.module.ts` file to include the custom `KeycloakUniversalModule`:
import { NgModule } from '@angular/core';
import { ServerModule } from '@angular/platform-server';
import { AppModule } from './app.module';
import { KeycloakUniversalModule } from './keycloak-universal.module';
@NgModule({
imports: [
AppModule,
ServerModule,
KeycloakUniversalModule
]
})
export class AppServerModule { }
Step 4: Implement a Custom Login Function
Create a new file `keycloak-login.service.ts` and add the following code:
import { Injectable } from '@angular/core';
import { KeycloakService } from 'keycloak-angular';
@Injectable()
export class KeycloakLoginService {
constructor(private keycloakService: KeycloakService) { }
login(): void {
this.keycloakService.login({
redirectUri: window.location.origin + '/protected-resource'
});
}
}
This service will handle the login functionality and redirect the user to the protected resource upon successful login.
Step 5: Update Your Login Component
Update your login component to use the custom `KeycloakLoginService`:
import { Component, OnInit } from '@angular/core';
import { KeycloakLoginService } from './keycloak-login.service';
@Component({
selector: 'app-login',
template: ''
})
export class LoginComponent implements OnInit {
constructor(private keycloakLoginService: KeycloakLoginService) { }
ngOnInit(): void {
}
login(): void {
this.keycloakLoginService.login();
}
}
Step 6: Configure Server-Side Rendering (SSR)
Make sure you have configured SSR correctly in your `angular.json` file:
{
"projects": {
"your-app": {
...
"architect": {
"build": {
...
"options": {
...
"outputPath": "dist/your-app",
"index": "src/index.html",
"assetOptimization": true,
" NamedChunks": true,
"aot": true,
"universal": true
},
...
},
"serve": {
...
"options": {
...
"browserTarget": "your-app:build"
},
...
}
}
}
}
}
In the above configuration, make sure `universal` is set to `true` in the `build` options.
Step 7: Run Your Application
Run your application using the following command:
npm run build:ssr && npm run serve:ssr
This will build and serve your application in SSR mode.
Troubleshooting Common Issues
If you encounter any issues during the implementation, refer to the following troubleshooting guide:
Keycloak token validation fails | Check that your `keycloak.json` file is correct and the token validation is configured correctly. |
Login redirection doesn’t work | Verify that your custom `KeycloakUniversalModule` is imported correctly in `app.server.module.ts`. |
SSR mode not working | Check that SSR is configured correctly in your `angular.json` file and the `universal` option is set to `true`. |
Conclusion
And there you have it! With these steps, you should now have a working Keycloak Angular SSR login redirection. Remember to be patient and follow each step carefully, for the devil lies in the details. If you encounter any issues, refer to the troubleshooting guide or seek help from the Angular and Keycloak communities.
Happy coding, and may the login redirection be with you!
Frequently Asked Question
Get answers to the most pressing questions about Keycloak Angular SSR login redirection not working!
Why is my Keycloak Angular SSR login redirection not working at all?
It’s possible that you haven’t properly configured the Angular Universal setup for server-side rendering (SSR). Make sure you have installed the required packages, and the `server.ts` file is correctly set up to handle the login redirection.
I’ve checked my Angular Universal setup, but the login redirection still doesn’t work. What else could be the issue?
Verify that you have correctly implemented the Keycloak Angular adapter and configured the `keycloak.json` file. Also, ensure that the `login-required` parameter is set to `true` in your `keycloak.json` file, and you have imported the `KeycloakModule` in your Angular module.
Is it possible that my Keycloak server configuration is causing the login redirection issue?
Yes, that’s a possibility! Check your Keycloak server configuration to ensure that the redirect URI is correctly set for your Angular application. Also, verify that the `Valid Redirect URIs` field in your Keycloak client configuration includes the URL of your Angular application.
Are there any specific headers or cookies that I need to set for the login redirection to work?
Yes, you need to set the `Authorization` header with the Bearer token obtained from Keycloak after a successful login. Additionally, you should also set the `KEYCLOAK_TOKEN` cookie on the client-side to store the token.
I’ve tried all the above solutions, but the login redirection still doesn’t work. What’s my next step?
If none of the above solutions work, try debugging your application by enabling debug logs for Keycloak and your Angular application. This will help you identify the exact issue and troubleshoot the problem more effectively.