vapor-docs/build/2.0/auth/getting-started/index.html

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Routing
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Routing
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Parameters
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Group
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Collection
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Redis
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Redis
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Package
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Provider
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Auth
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Auth
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Package
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Provider
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Getting Started
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Getting Started
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<a href="#package" title="Package" class="md-nav__link">
Package
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Example
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<nav class="md-nav">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#user" title="User" class="md-nav__link">
User
</a>
</li>
<li class="md-nav__item">
<a href="#token" title="Token" class="md-nav__link">
Token
</a>
</li>
<li class="md-nav__item">
<a href="#token-authenticatable" title="Token Authenticatable" class="md-nav__link">
Token Authenticatable
</a>
</li>
<li class="md-nav__item">
<a href="#user-helper" title="User Helper" class="md-nav__link">
User Helper
</a>
</li>
<li class="md-nav__item">
<a href="#middleware" title="Middleware" class="md-nav__link">
Middleware
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</li>
<li class="md-nav__item">
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Route
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Database
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<nav class="md-nav">
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<a href="#users" title="Users" class="md-nav__link">
Users
</a>
</li>
<li class="md-nav__item">
<a href="#tokens" title="Tokens" class="md-nav__link">
Tokens
</a>
</li>
</ul>
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</li>
<li class="md-nav__item">
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Request
</a>
<nav class="md-nav">
<ul class="md-nav__list">
<li class="md-nav__item">
<a href="#bad-token" title="Bad Token" class="md-nav__link">
Bad Token
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
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Next Steps
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</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="../helper/" title="Helper" class="md-nav__link">
Helper
</a>
</li>
<li class="md-nav__item">
<a href="../password/" title="Password" class="md-nav__link">
Password
</a>
</li>
<li class="md-nav__item">
<a href="../persist/" title="Persist" class="md-nav__link">
Persist
</a>
</li>
<li class="md-nav__item">
<a href="../redirect-middleware/" title="Redirect Middleware" class="md-nav__link">
Redirect Middleware
</a>
</li>
</ul>
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-12" type="checkbox" id="nav-12">
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JWT
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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JWT
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Package
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<li class="md-nav__item">
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Overview
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</ul>
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Sessions
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Sessions
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<a href="../../sessions/package/" title="Package" class="md-nav__link">
Package
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Sessions
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HTTP
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HTTP
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<a href="../../http/package/" title="Package" class="md-nav__link">
Package
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<a href="../../http/request/" title="Request" class="md-nav__link">
Request
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</li>
<li class="md-nav__item">
<a href="../../http/response/" title="Response" class="md-nav__link">
Response
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</li>
<li class="md-nav__item">
<a href="../../http/middleware/" title="Middleware" class="md-nav__link">
Middleware
</a>
</li>
<li class="md-nav__item">
<a href="../../http/body/" title="Body" class="md-nav__link">
Body
</a>
</li>
<li class="md-nav__item">
<a href="../../http/response-representable/" title="ResponseRepresentable" class="md-nav__link">
ResponseRepresentable
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</li>
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<a href="../../http/responder/" title="Responder" class="md-nav__link">
Responder
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</li>
<li class="md-nav__item">
<a href="../../http/client/" title="Client" class="md-nav__link">
Client
</a>
</li>
<li class="md-nav__item">
<a href="../../http/server/" title="Server" class="md-nav__link">
Server
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CORS
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Leaf
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Leaf
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Package
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<a href="https://github.com/vapor/documentation/edit/master/2.0/docs/auth/getting-started.md" title="Edit this page" class="md-icon md-content__edit">edit</a>
<h1 id="getting-started">Getting Started<a class="headerlink" href="#getting-started" title="Permanent link">&para;</a></h1>
<p>Vapor's <a href="https://github.com/vapor/auth-provider">Auth Provider</a> package makes implementing authentication and
authorization easy and secure. It supports common auth patterns such as:</p>
<ul>
<li>Token (bearer) authentication</li>
<li>Username + password (basic) authentication</li>
<li>Permission-based authorization</li>
<li>Session-based persistance </li>
</ul>
<p>Auth's modular, protocol-based nature also makes it a great foundation for custom auth needs.</p>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>Use <code>vapor new &lt;name&gt; --template=vapor/auth-template</code> to create a new <a href="https://github.com/vapor/auth-template">project template</a> with AuthProvider and samples included.</p>
</div>
<h2 id="package">Package<a class="headerlink" href="#package" title="Permanent link">&para;</a></h2>
<p>To use Auth, you will need to have the <a href="https://github.com/vapor/auth-provider">Auth Provider</a> added to your project.
This is as simple as adding the following line to your <code>Package.swift</code> file.</p>
<div class="codehilite"><pre><span></span><span class="p">.</span><span class="n">Package</span><span class="p">(</span><span class="n">url</span><span class="p">:</span> <span class="s">&quot;https://github.com/vapor/auth-provider.git&quot;</span><span class="p">,</span> <span class="p">...)</span>
</pre></div>
<p>Check out the <a href="../package/">Package</a> section for more information.</p>
<h2 id="example">Example<a class="headerlink" href="#example" title="Permanent link">&para;</a></h2>
<p>Let's take a look at how we can implement a simple, token-based authentication system using Vapor and Auth.</p>
<h3 id="user">User<a class="headerlink" href="#user" title="Permanent link">&para;</a></h3>
<p>We will start by creating a model to represent our user. If you already have a user class, you can skip this step.</p>
<div class="codehilite"><pre><span></span><span class="kd">import</span> <span class="nc">Vapor</span>
<span class="kd">import</span> <span class="nc">FluentProvider</span>
<span class="kr">final</span> <span class="kd">class</span> <span class="nc">ExampleUser</span><span class="p">:</span> <span class="n">Model</span> <span class="p">{</span>
<span class="kd">let</span> <span class="nv">name</span><span class="p">:</span> <span class="nb">String</span>
<span class="p">...</span>
<span class="p">}</span>
<span class="kd">extension</span> <span class="nc">ExampleUser</span><span class="p">:</span> <span class="n">Preparation</span> <span class="p">{</span> <span class="p">...</span> <span class="p">}</span>
</pre></div>
<p>Here we create a very simple user with just one property: a name.</p>
<div class="admonition seealso">
<p class="admonition-title">Seealso</p>
<p>We're omitting most of <code>Model</code> and <code>Preparation</code> protocol requirements. Check out Fluent's
<a href="../../fluent/getting-started/">Getting Started</a> for more information about these protocols.</p>
</div>
<h3 id="token">Token<a class="headerlink" href="#token" title="Permanent link">&para;</a></h3>
<p>Next let's create a model to represent our authentication tokens. These will be stored in a separate database
table or collection called "tokens".</p>
<p>When a user logs in, we will create a new token for them. They will then use this token on subsequent requests
instead of their username and password. </p>
<p>For now, here's what our simple token model will look like.</p>
<div class="codehilite"><pre><span></span><span class="kd">import</span> <span class="nc">Vapor</span>
<span class="kd">import</span> <span class="nc">FluentProvider</span>
<span class="kr">final</span> <span class="kd">class</span> <span class="nc">ExampleToken</span><span class="p">:</span> <span class="n">Model</span> <span class="p">{</span>
<span class="kd">let</span> <span class="nv">token</span><span class="p">:</span> <span class="nb">String</span>
<span class="kd">let</span> <span class="nv">userId</span><span class="p">:</span> <span class="n">Identifier</span>
<span class="kd">var</span> <span class="nv">user</span><span class="p">:</span> <span class="n">Parent</span><span class="p">&lt;</span><span class="n">ExampleToken</span><span class="p">,</span> <span class="n">ExampleUser</span><span class="p">&gt;</span> <span class="p">{</span>
<span class="k">return</span> <span class="n">parent</span><span class="p">(</span><span class="n">id</span><span class="p">:</span> <span class="n">userId</span><span class="p">)</span>
<span class="p">}</span>
<span class="p">...</span>
<span class="p">}</span>
<span class="kd">extension</span> <span class="nc">ExampleToken</span><span class="p">:</span> <span class="n">Preparation</span> <span class="p">{</span> <span class="p">...</span> <span class="p">}</span>
</pre></div>
<p>This token has two properties:</p>
<ul>
<li>token: a unique, random string that we will send in requests</li>
<li>userId: the identifier for the user to whom this token belongs</li>
</ul>
<div class="admonition seealso">
<p class="admonition-title">Seealso</p>
<p>We're using Fluent relations here. Check out Fluent's <a href="../../fluent/relations/">Relations</a>
section for more information.</p>
</div>
<h3 id="token-authenticatable">Token Authenticatable<a class="headerlink" href="#token-authenticatable" title="Permanent link">&para;</a></h3>
<p>Now that we have our example user and token, we can make our user authenticatable with the token.</p>
<p>This might sound complicated, but it's actually pretty easy:</p>
<div class="codehilite"><pre><span></span><span class="kd">import</span> <span class="nc">AuthProvider</span>
<span class="kd">extension</span> <span class="nc">ExampleUser</span><span class="p">:</span> <span class="n">TokenAuthenticatable</span> <span class="p">{</span>
<span class="c1">// the token model that should be queried</span>
<span class="c1">// to authenticate this user</span>
<span class="kd">public</span> <span class="kd">typealias</span> <span class="n">TokenType</span> <span class="p">=</span> <span class="n">ExampleToken</span>
<span class="p">}</span>
</pre></div>
<p>Now that our example user is <code>TokenAuthenticatable</code>, we can move on to the next step!</p>
<h3 id="user-helper">User Helper<a class="headerlink" href="#user-helper" title="Permanent link">&para;</a></h3>
<p>Let's add a simple convenience method on request for accessing the authenticated user.</p>
<div class="codehilite"><pre><span></span><span class="kd">extension</span> <span class="nc">Request</span> <span class="p">{</span>
<span class="kd">func</span> <span class="nf">user</span><span class="p">()</span> <span class="kr">throws</span> <span class="p">-&gt;</span> <span class="n">ExampleUser</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">try</span> <span class="n">auth</span><span class="p">.</span><span class="n">assertAuthenticated</span><span class="p">()</span>
<span class="p">}</span>
<span class="p">}</span>
</pre></div>
<p>This is a nice shortcut that will come in handy in a few steps.</p>
<h3 id="middleware">Middleware<a class="headerlink" href="#middleware" title="Permanent link">&para;</a></h3>
<p>To require authentication we need to add the <code>TokenAuthenticationMiddleware</code>. You can apply this middleware
to individual routes or to the entire Droplet. For simplicity, we'll apply it to the Droplet.</p>
<div class="codehilite"><pre><span></span><span class="kd">import</span> <span class="nc">Vapor</span>
<span class="kd">import</span> <span class="nc">AuthProvider</span>
<span class="kd">import</span> <span class="nc">FluentProvider</span>
<span class="kd">let</span> <span class="nv">config</span> <span class="p">=</span> <span class="k">try</span> <span class="n">Config</span><span class="p">()</span>
<span class="n">config</span><span class="p">.</span><span class="n">preparations</span><span class="p">.</span><span class="n">append</span><span class="p">(</span><span class="n">ExampleUser</span><span class="p">.</span><span class="kc">self</span><span class="p">)</span>
<span class="n">config</span><span class="p">.</span><span class="n">preparations</span><span class="p">.</span><span class="n">append</span><span class="p">(</span><span class="n">ExampleToken</span><span class="p">.</span><span class="kc">self</span><span class="p">)</span>
<span class="kd">let</span> <span class="nv">drop</span> <span class="p">=</span> <span class="k">try</span> <span class="n">Droplet</span><span class="p">(</span><span class="n">config</span><span class="p">)</span>
<span class="kd">let</span> <span class="nv">tokenMiddleware</span> <span class="p">=</span> <span class="n">TokenAuthenticationMiddleware</span><span class="p">(</span><span class="n">ExampleUser</span><span class="p">.</span><span class="kc">self</span><span class="p">)</span>
<span class="c1">/// use this route group for protected routes</span>
<span class="kd">let</span> <span class="nv">authed</span> <span class="p">=</span> <span class="n">drop</span><span class="p">.</span><span class="n">grouped</span><span class="p">(</span><span class="n">tokenMiddleware</span><span class="p">)</span>
</pre></div>
<p>Since our <code>ExampleUser</code> class is <code>TokenAuthenticatable</code>, we can pass it into the middleware's init method.</p>
<div class="admonition seealso">
<p class="admonition-title">Seealso</p>
<p>If you only want to require authentication for certain routes, look at our
<a href="../../routing/group/">Route Group</a> section in the routing docs.</p>
</div>
<h3 id="route">Route<a class="headerlink" href="#route" title="Permanent link">&para;</a></h3>
<p>Now that we have a route group protected by our TokenMiddleware, let's add a route to
return the authenticated user's name.</p>
<div class="codehilite"><pre><span></span><span class="n">authed</span><span class="p">.</span><span class="kr">get</span><span class="p">(</span><span class="s">&quot;me&quot;</span><span class="p">)</span> <span class="p">{</span> <span class="n">req</span> <span class="k">in</span>
<span class="c1">// return the authenticated user&#39;s name</span>
<span class="k">return</span> <span class="k">try</span> <span class="n">req</span><span class="p">.</span><span class="n">user</span><span class="p">().</span><span class="n">name</span>
<span class="p">}</span>
</pre></div>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>We're using the <code>.user()</code> convenience we added to <code>Request</code> here. It is a shortcut
for <code>let user = try req.auth.assertAuthenticated(ExampleUser.self)</code> </p>
</div>
<h3 id="database">Database<a class="headerlink" href="#database" title="Permanent link">&para;</a></h3>
<p>That's it! We now have a functioning authentication system. Let's add a couple of entries
to our database and test it out.</p>
<h4 id="users">Users<a class="headerlink" href="#users" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th>id</th>
<th>name</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Bob</td>
</tr>
</tbody>
</table>
<h4 id="tokens">Tokens<a class="headerlink" href="#tokens" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th>id</th>
<th>token</th>
<th>user_id</th>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>foo</td>
<td>1</td>
</tr>
</tbody>
</table>
<h3 id="request">Request<a class="headerlink" href="#request" title="Permanent link">&para;</a></h3>
<p>Now we can make a request to our Vapor app.</p>
<div class="codehilite"><pre><span></span><span class="nf">GET</span> <span class="nn">/me</span> <span class="kr">HTTP</span><span class="o">/</span><span class="m">1.1</span>
<span class="na">Authorization</span><span class="o">:</span> <span class="l">Bearer foo</span>
</pre></div>
<p>And we should get a response like.</p>
<div class="codehilite"><pre><span></span><span class="kr">HTTP</span><span class="o">/</span><span class="m">1.1</span> <span class="m">200</span> <span class="ne">OK</span>
<span class="na">Content-Type</span><span class="o">:</span> <span class="l">text/plain</span>
Bob
</pre></div>
<h4 id="bad-token">Bad Token<a class="headerlink" href="#bad-token" title="Permanent link">&para;</a></h4>
<p>To make sure it's secure, let's test using a token that's not in our database.</p>
<div class="codehilite"><pre><span></span><span class="nf">GET</span> <span class="nn">/me</span> <span class="kr">HTTP</span><span class="o">/</span><span class="m">1.1</span>
<span class="na">Authorization</span><span class="o">:</span> <span class="l">Bearer not-a-token</span>
</pre></div>
<p>And we should get a response like.</p>
<div class="codehilite"><pre><span></span><span class="kr">HTTP</span><span class="o">/</span><span class="m">1.1</span> <span class="m">403</span> <span class="ne">Forbidden</span>
</pre></div>
<h3 id="next-steps">Next Steps<a class="headerlink" href="#next-steps" title="Permanent link">&para;</a></h3>
<p>To build this out into a production-ready authentication system, you will need to build some
additional routes for creating users and creating tokens. </p>
<p>Continue on in the Auth section to learn more about different types of authentication.</p>
</article>
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