okta.github.io/code/angular/okta_angular_auth_js.html at master · alexcodebr/okta.github.io

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        <h1 id="overview">Overview</h1>
<p>This guide will walk you through integrating authentication and authorization into an Angular application with Okta.</p>
<h2 id="prerequisites">Prerequisites</h2>
<p>If you do not already have a  <strong>Developer Edition Account</strong>, you can create one at <a href="/signup/">https://developer.okta.com/signup/</a>.</p>
<h3 id="add-an-openid-connect-client">Add an OpenID Connect Client</h3>
  <li>Log into the Okta Developer Dashboard, and <strong>Create New App</strong></li>
  <li>Choose <strong>Single Page App (SPA)</strong> as the platform, then populate your new OpenID Connect application with values similar to:</li>
      <th>Setting</th>
      <th>Value</th>
      <td>Application Name</td>
      <td>OpenId Connect App <em>(must be unique)</em></td>
      <td>Login redirect URIs</td>
      <td>http://localhost:4200/callback</td>
      <td>Logout redirect URIs</td>
      <td>http://localhost:4200/login</td>
<blockquote>
  <p><strong>Note:</strong> CORS is automatically enabled for the granted login redirect URIs.</p>
</blockquote>
<h2 id="create-an-angular-app">Create an Angular App</h2>
<p>To quickly create an Angular app, install the Angular CLI:</p>
<div class="language-bash highlighter-rouge"><pre class="highlight"><code>npm install -g @angular/cli
</code></pre>
<p>Now, create a new application:</p>
<div class="language-bash highlighter-rouge"><pre class="highlight"><code>ng new okta-app
</code></pre>
<p>This creates a new project named <code class="highlighter-rouge">okta-app</code> and installs all required dependencies.</p>
<p>The simplest way to add authentication into an Angular app is using the library <a href="/code/javascript/okta_auth_sdk/">Okta Auth JS</a>. We can install it via <code class="highlighter-rouge">npm</code>:</p>
<div class="language-bash highlighter-rouge"><pre class="highlight"><code>npm install @okta/okta-auth-js --save
</code></pre>
<h2 id="create-an-authentication-service">Create an Authentication Service</h2>
<p>Users can sign in to your Angular application a number of different ways.
The easiest, and most secure way is to use the <strong>default login page</strong>. This page renders the <a href="/code/javascript/okta_sign-in_widget/">Okta Sign-In Widget</a>, equipped to handle User Lifecycle operations, MFA, and more.</p>
<p>First, create <code class="highlighter-rouge">src/app/app.service.ts</code> as an authorization utility file and use it to bootstrap the required fields to login:</p>
<blockquote>
  <p>Important: We’re using Okta’s organization authorization server to make setup easy, but it’s less flexible than a custom authorization server. Most SPAs send access tokens to access APIs. If you’re building an API that will need to accept access tokens, <a href="/docs/how-to/set-up-auth-server.html#create-an-authorization-server">create an authorization server</a>.</p>
</blockquote>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// app.service.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Injectable</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/core'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Router</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/router'</span><span class="p">;</span>
<span class="k">import</span> <span class="o">*</span> <span class="k">as</span> <span class="nx">OktaAuth</span> <span class="k">from</span> <span class="s1">'@okta/okta-auth-js/dist/okta-auth-js.min.js'</span><span class="p">;</span>
<span class="err">@</span><span class="nx">Injectable</span><span class="p">()</span>
<span class="k">export</span> <span class="kr">class</span> <span class="nx">OktaAuthService</span> <span class="p">{</span>
  <span class="nx">oktaAuth</span> <span class="o">=</span> <span class="k">new</span> <span class="nx">OktaAuth</span><span class="p">({</span>
    <span class="na">url</span><span class="p">:</span> <span class="s1">'https://{yourOktaDomain}.com'</span><span class="p">,</span>
    <span class="na">clientId</span><span class="p">:</span> <span class="s1">'{clientId}'</span><span class="p">,</span>
    <span class="na">issuer</span><span class="p">:</span> <span class="s1">'https://{yourOktaDomain}.com/oauth2/{authorizationServerId}'</span><span class="p">,</span>
    <span class="na">redirectUri</span><span class="p">:</span> <span class="s1">'http://localhost:4200/callback'</span><span class="p">,</span>
  <span class="p">});</span>
  <span class="kd">constructor</span><span class="p">(</span><span class="k">private</span> <span class="nx">router</span><span class="err">:</span> <span class="nx">Router</span><span class="p">)</span> <span class="p">{}</span>
  <span class="nx">isAuthenticated</span><span class="p">()</span> <span class="p">{</span>
    <span class="c1">// Checks if there is a current accessToken in the TokenManger.</span>
    <span class="k">return</span> <span class="o">!!</span><span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">tokenManager</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="s1">'accessToken'</span><span class="p">);</span>
  <span class="p">}</span>
  <span class="nx">login</span><span class="p">()</span> <span class="p">{</span>
    <span class="c1">// Launches the login redirect.</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">token</span><span class="p">.</span><span class="nx">getWithRedirect</span><span class="p">({</span> 
      <span class="na">responseType</span><span class="p">:</span> <span class="p">[</span><span class="s1">'id_token'</span><span class="p">,</span> <span class="s1">'token'</span><span class="p">],</span>
      <span class="na">scopes</span><span class="p">:</span> <span class="p">[</span><span class="s1">'openid'</span><span class="p">,</span> <span class="s1">'email'</span><span class="p">,</span> <span class="s1">'profile'</span><span class="p">]</span>
    <span class="p">});</span>
  <span class="p">}</span>
  <span class="k">async</span> <span class="nx">handleAuthentication</span><span class="p">()</span> <span class="p">{</span>
    <span class="kd">const</span> <span class="nx">tokens</span> <span class="o">=</span> <span class="k">await</span> <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">token</span><span class="p">.</span><span class="nx">parseFromUrl</span><span class="p">();</span>
    <span class="nx">tokens</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="nx">token</span> <span class="o">=&gt;</span> <span class="p">{</span>
      <span class="k">if</span> <span class="p">(</span><span class="nx">token</span><span class="p">.</span><span class="nx">idToken</span><span class="p">)</span> <span class="p">{</span>
        <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">tokenManager</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="s1">'idToken'</span><span class="p">,</span> <span class="nx">token</span><span class="p">);</span>
      <span class="p">}</span>
      <span class="k">if</span> <span class="p">(</span><span class="nx">token</span><span class="p">.</span><span class="nx">accessToken</span><span class="p">)</span> <span class="p">{</span>
        <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">tokenManager</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="s1">'accessToken'</span><span class="p">,</span> <span class="nx">token</span><span class="p">);</span>
      <span class="p">}</span>
    <span class="p">});</span>
  <span class="p">}</span>
  <span class="k">async</span> <span class="nx">logout</span><span class="p">()</span> <span class="p">{</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">tokenManager</span><span class="p">.</span><span class="nx">clear</span><span class="p">();</span>
    <span class="k">await</span> <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">signOut</span><span class="p">();</span>
  <span class="p">}</span>
<span class="p">}</span>
</code></pre>
<h2 id="create-an-authorization-guard">Create an Authorization Guard</h2>
<p>Now that you have a shared service to start, control, and end the authentication state, use it to protect the endpoints of an app.</p>
<p>Create <code class="highlighter-rouge">src/app/app.guard.ts</code> that implements <a href="https://angular.io/api/router/CanActivate"><code class="highlighter-rouge">CanActivate</code></a>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// app.guard.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Injectable</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/core'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Router</span><span class="p">,</span> <span class="nx">CanActivate</span><span class="p">,</span> <span class="nx">ActivatedRouteSnapshot</span><span class="p">,</span> <span class="nx">RouterStateSnapshot</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/router'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">OktaAuthService</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./app.service'</span><span class="p">;</span>
<span class="err">@</span><span class="nx">Injectable</span><span class="p">()</span>
<span class="k">export</span> <span class="kr">class</span> <span class="nx">OktaAuthGuard</span> <span class="k">implements</span> <span class="nx">CanActivate</span> <span class="p">{</span>
  <span class="nx">oktaAuth</span><span class="p">;</span>
  <span class="nx">authenticated</span><span class="p">;</span>
  <span class="kd">constructor</span><span class="p">(</span><span class="k">private</span> <span class="nx">okta</span><span class="err">:</span> <span class="nx">OktaAuthService</span><span class="p">,</span> <span class="k">private</span> <span class="nx">router</span><span class="err">:</span> <span class="nx">Router</span><span class="p">)</span> <span class="p">{</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">authenticated</span> <span class="o">=</span> <span class="nx">okta</span><span class="p">.</span><span class="nx">isAuthenticated</span><span class="p">()</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span> <span class="o">=</span> <span class="nx">okta</span><span class="p">;</span>
  <span class="p">}</span>
  <span class="nx">canActivate</span><span class="p">(</span><span class="nx">route</span><span class="err">:</span> <span class="nx">ActivatedRouteSnapshot</span><span class="p">,</span> <span class="nx">state</span><span class="err">:</span> <span class="nx">RouterStateSnapshot</span><span class="p">)</span> <span class="p">{</span>
    <span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">authenticated</span><span class="p">)</span> <span class="p">{</span> <span class="k">return</span> <span class="kc">true</span><span class="p">;</span> <span class="p">}</span>
    <span class="c1">// Redirect to login flow.</span>
    <span class="k">this</span><span class="p">.</span><span class="nx">oktaAuth</span><span class="p">.</span><span class="nx">login</span><span class="p">();</span>
    <span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
  <span class="p">}</span>
<span class="p">}</span>
</code></pre>
<p>Whenever a user attempts to access a route that is protected by <code class="highlighter-rouge">OktaAuthGuard</code>, it first checks to see if the user has been authenticated. If <code class="highlighter-rouge">isAuthenticated()</code> returns <code class="highlighter-rouge">false</code>, start the login flow.</p>
<p>Finally, inject the guard and service into <code class="highlighter-rouge">src/app/app.module.ts</code> so we can use it in any declared routes:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// app.module.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">BrowserModule</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/platform-browser'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">NgModule</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/core'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">RouterModule</span><span class="p">,</span> <span class="nx">Routes</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/router'</span><span class="p">;</span>
<span class="c1">// Okta Guard and Service</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">OktaAuthGuard</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./app.guard'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">OktaAuthService</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./app.service'</span><span class="p">;</span>
</code></pre>
<h2 id="add-routes">Add Routes</h2>
<p>Lets take a look at what routes are needed:</p>
  <li><code class="highlighter-rouge">/</code>: A default page to handle basic control of the app.</li>
  <li><code class="highlighter-rouge">/callback</code>: Handle the response back from Okta and store the returned tokens.</li>
  <li><code class="highlighter-rouge">/protected</code>: A protected route by the <code class="highlighter-rouge">OktaAuthGuard</code>.</li>
<h3><code class="highlighter-rouge">/</code></h3>
<p>First, update <code class="highlighter-rouge">src/app/app.component.html</code> to provide the Login logic:</p>
<div class="language-html highlighter-rouge"><pre class="highlight"><code><span class="c">&lt;!-- app.component.html --&gt;</span>
<span class="nt">&lt;button</span> <span class="na">routerLink=</span><span class="s">"/"</span><span class="nt">&gt;</span> Home <span class="nt">&lt;/button&gt;</span>
<span class="nt">&lt;button</span> <span class="err">*</span><span class="na">ngIf=</span><span class="s">"!oktaAuth.isAuthenticated()"</span> <span class="err">(</span><span class="na">click</span><span class="err">)="</span><span class="na">oktaAuth</span><span class="err">.</span><span class="na">login</span><span class="err">()"</span><span class="nt">&gt;</span> Login <span class="nt">&lt;/button&gt;</span>
<span class="nt">&lt;button</span> <span class="err">*</span><span class="na">ngIf=</span><span class="s">"oktaAuth.isAuthenticated()"</span> <span class="err">(</span><span class="na">click</span><span class="err">)="</span><span class="na">oktaAuth</span><span class="err">.</span><span class="na">logout</span><span class="err">()"</span><span class="nt">&gt;</span> Logout <span class="nt">&lt;/button&gt;</span>
<span class="nt">&lt;button</span> <span class="na">routerLink=</span><span class="s">"/protected"</span><span class="nt">&gt;</span> Protected <span class="nt">&lt;/button&gt;</span>
<span class="nt">&lt;router-outlet&gt;&lt;/router-outlet&gt;</span>
</code></pre>
<p>Then, update <code class="highlighter-rouge">src/app/app.component.ts</code> to handle the <code class="highlighter-rouge">login()</code> and <code class="highlighter-rouge">logout()</code> calls:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// app.component.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Component</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/core'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">OktaAuthService</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./app.service'</span><span class="p">;</span>
<span class="err">@</span><span class="nx">Component</span><span class="p">({</span>
  <span class="na">selector</span><span class="p">:</span> <span class="s1">'app-root'</span><span class="p">,</span>
  <span class="na">templateUrl</span><span class="p">:</span> <span class="s1">'./app.component.html'</span><span class="p">,</span>
  <span class="na">styleUrls</span><span class="p">:</span> <span class="p">[</span><span class="s1">'./app.component.css'</span><span class="p">]</span>
<span class="p">})</span>
<span class="k">export</span> <span class="kr">class</span> <span class="nx">AppComponent</span> <span class="p">{</span>
  <span class="kd">constructor</span><span class="p">(</span><span class="k">public</span> <span class="nx">oktaAuth</span><span class="err">:</span> <span class="nx">OktaAuthService</span><span class="p">)</span> <span class="p">{}</span>
<span class="p">}</span>
</code></pre>
<h3 id="callback"><code class="highlighter-rouge">/callback</code></h3>
<p>In order to handle the redirect back from Okta, we need to capture the token values from the URL. Use the <code class="highlighter-rouge">/callback</code> route to handle the logic of storing these tokens and redirecting back to the main page.</p>
<p>Create a new component <code class="highlighter-rouge">src/app/callback.component.ts</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// callback.component.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Component</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/core'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">OktaAuthService</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./app.service'</span><span class="p">;</span>
<span class="err">@</span><span class="nx">Component</span><span class="p">({</span> <span class="na">template</span><span class="p">:</span> <span class="err">``</span> <span class="p">})</span>
<span class="k">export</span> <span class="kr">class</span> <span class="nx">CallbackComponent</span> <span class="p">{</span>
  <span class="kd">constructor</span><span class="p">(</span><span class="k">private</span> <span class="nx">okta</span><span class="err">:</span> <span class="nx">OktaAuthService</span><span class="p">)</span> <span class="p">{</span>
    <span class="c1">// Handles the response from Okta and parses tokens</span>
    <span class="nx">okta</span><span class="p">.</span><span class="nx">handleAuthentication</span><span class="p">();</span>
  <span class="p">}</span>
<span class="p">}</span>
</code></pre>
<h3 id="protected"><code class="highlighter-rouge">/protected</code></h3>
<p>This route will be protected by the <code class="highlighter-rouge">OktaAuthGuard</code>, only permitting users with a valid <code class="highlighter-rouge">accessToken</code>.</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// protected.component.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">Component</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'@angular/core'</span><span class="p">;</span>
<span class="err">@</span><span class="nx">Component</span><span class="p">({</span>
  <span class="na">selector</span><span class="p">:</span> <span class="s1">'app-secure'</span><span class="p">,</span>
  <span class="na">template</span><span class="p">:</span> <span class="err">``</span>
<span class="p">})</span>
<span class="k">export</span> <span class="kr">class</span> <span class="nx">ProtectedComponent</span> <span class="p">{</span>
  <span class="kd">constructor</span><span class="p">()</span> <span class="p">{</span> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s2">"Protected endpont!"</span><span class="p">);</span> <span class="p">}</span>
<span class="p">}</span>
</code></pre>
<h3 id="connect-the-routes">Connect the Routes</h3>
<p>Add each of our new routes to <code class="highlighter-rouge">src/app/app.module.ts</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// app.module.ts</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">CallbackComponent</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./callback.component'</span><span class="p">;</span>
<span class="k">import</span> <span class="p">{</span> <span class="nx">ProtectedComponent</span> <span class="p">}</span> <span class="k">from</span> <span class="s1">'./protected.component'</span><span class="p">;</span>
<span class="p">...</span>
<span class="kd">const</span> <span class="nx">appRoutes</span><span class="err">:</span> <span class="nx">Routes</span> <span class="o">=</span> <span class="p">[</span>
  <span class="p">{</span>
    <span class="na">path</span><span class="p">:</span> <span class="s1">'callback'</span><span class="p">,</span>
    <span class="na">component</span><span class="p">:</span> <span class="nx">CallbackComponent</span>
  <span class="p">},</span>
  <span class="p">{</span>
    <span class="na">path</span><span class="p">:</span> <span class="s1">'protected'</span><span class="p">,</span>
    <span class="na">component</span><span class="p">:</span> <span class="nx">ProtectedComponent</span><span class="p">,</span>
    <span class="na">canActivate</span><span class="p">:</span> <span class="p">[</span> <span class="nx">OktaAuthGuard</span> <span class="p">]</span>
  <span class="p">}</span>
<span class="p">]</span>
</code></pre>
<p><em>Notice how the path <a href="#protected">/protected</a> uses the <code class="highlighter-rouge">canActivate</code> parameter to gate access to the route.</em></p>
<p>Finally, update your <code class="highlighter-rouge">@NgModule</code> to include your project components and routes in <code class="highlighter-rouge">src/app/app.module.ts</code>:</p>
<div class="language-typescript highlighter-rouge"><pre class="highlight"><code><span class="c1">// app.module.ts</span>
<span class="err">@</span><span class="nx">NgModule</span><span class="p">({</span>
  <span class="na">declarations</span><span class="p">:</span> <span class="p">[</span>
    <span class="nx">AppComponent</span><span class="p">,</span>
    <span class="nx">CallbackComponent</span><span class="p">,</span>
    <span class="nx">ProtectedComponent</span>
  <span class="p">],</span>
  <span class="na">imports</span><span class="p">:</span> <span class="p">[</span>
    <span class="nx">BrowserModule</span><span class="p">,</span>
    <span class="nx">RouterModule</span><span class="p">.</span><span class="nx">forRoot</span><span class="p">(</span><span class="nx">appRoutes</span><span class="p">)</span>
  <span class="p">],</span>
  <span class="na">providers</span><span class="p">:</span> <span class="p">[</span>
    <span class="nx">OktaAuthGuard</span><span class="p">,</span>
    <span class="nx">OktaAuthService</span><span class="p">,</span>
  <span class="p">],</span>
  <span class="na">bootstrap</span><span class="p">:</span> <span class="p">[</span> <span class="nx">AppComponent</span> <span class="p">]</span>
<span class="p">})</span>
<span class="k">export</span> <span class="kr">class</span> <span class="nx">AppModule</span> <span class="p">{</span> <span class="p">}</span>
</code></pre>
<h2 id="conclusion">Conclusion</h2>
<p>You have now successfully authenticated with Okta! Now what? With a user’s <code class="highlighter-rouge">id_token</code>, you have basic claims for the user’s identity. You can extend the set of claims by modifying the <code class="highlighter-rouge">scopes</code> to retrieve custom information about the user. This includes <code class="highlighter-rouge">locale</code>, <code class="highlighter-rouge">address</code>, <code class="highlighter-rouge">groups</code>, and <a href="../../docs/api/resources/oidc.html">more</a>.</p>
<p>Want to learn how to use the user’s <code class="highlighter-rouge">access_token</code>? Check out our <a href="/quickstart/#/angular/nodejs/generic.html">Angular Quickstart integrations</a> to learn about protecting routes on your server, validating the <code class="highlighter-rouge">access_token</code>, and more!</p>
<h2 id="support">Support</h2>
<p>Have a question or see a bug? Post your question on <a href="https://devforum.okta.com/">Okta Developer Forums</a>.</p>
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