</code></pre><p>Reitit supports <ahref="https://swagger.io/"target="_blank">Swagger2</a> documentation, thanks to <ahref="https://github.com/metosin/schema-tools"target="_blank">schema-tools</a> and <ahref="https://github.com/metosin/spec-tools"target="_blank">spec-tools</a>. Documentation is extracted from route definitions, coercion <code>:parameters</code> and <code>:responses</code> and from a set of new documentation keys.</p>
<p>To enable swagger-documentation for a ring-router:</p>
<ol>
<li>annotate you routes with swagger-data</li>
<li>mount a swagger-handler to serve the swagger-spec</li>
<li>optionally mount a swagger-ui to visualize the swagger-spec</li>
</ol>
<h2id="swagger-data">Swagger data</h2>
<p>The following route data keys contribute to the generated swagger specification:</p>
<table>
<thead>
<tr>
<th>key</th>
<th>description</th>
</tr>
</thead>
<tbody>
<tr>
<td>:swagger</td>
<td>map of any swagger-data. Must have <code>:id</code> (keyword or sequence of keywords) to identify the api</td>
</tr>
<tr>
<td>:no-doc</td>
<td>optional boolean to exclude endpoint from api docs</td>
</tr>
<tr>
<td>:tags</td>
<td>optional set of strings of keywords tags for an endpoint api docs</td>
</tr>
<tr>
<td>:summary</td>
<td>optional short string summary of an endpoint</td>
</tr>
<tr>
<td>:description</td>
<td>optional long description of an endpoint. Supports <ahref="http://spec.commonmark.org/"target="_blank">http://spec.commonmark.org/</a></td>
</tr>
</tbody>
</table>
<p>Coercion keys also contribute to the docs:</p>
<table>
<thead>
<tr>
<th>key</th>
<th>description</th>
</tr>
</thead>
<tbody>
<tr>
<td>:parameters</td>
<td>optional input parameters for a route, in a format defined by the coercion</td>
</tr>
<tr>
<td>:responses</td>
<td>optional descriptions of responess, in a format defined by coercion</td>
</tr>
</tbody>
</table>
<p>There is a <code>reitit.swagger.swagger-feature</code>, which acts as both a <code>Middleware</code> and an <code>Interceptor</code> that is not participating in any request processing - it just defines the route data specs for the routes it's mounted to. It is only needed if the <ahref="route_data_validation.html">route data validation</a> is turned on.</p>
<p>To serve the actual <ahref="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md"target="_blank">Swagger Specification</a>, there is <code>reitit.swagger/create-swagger-handler</code>. It takes no arguments and returns a ring-handler which collects at request-time data from all routes for the same swagger api and returns a formatted Swagger specification as Clojure data, to be encoded by a response formatter.</p>
<p><ahref="https://github.com/swagger-api/swagger-ui"target="_blank">Swagger-ui</a> is a user interface to visualize and interact with the Swagger specification. To make things easy, there is a pre-integrated version of the swagger-ui as a separate module.</p>
</code></pre><p><code>reitit.swagger-ui/create-swagger-ui-hander</code> can be used to create a ring-handler to serve the swagger-ui. It accepts the following options:</p>
<table>
<thead>
<tr>
<th>key</th>
<th>description</th>
</tr>
</thead>
<tbody>
<tr>
<td>:parameter</td>
<td>optional name of the wildcard parameter, defaults to unnamed keyword <code>:</code></td>
</tr>
<tr>
<td>:root</td>
<td>optional resource root, defaults to <code>"swagger-ui"</code></td>
</tr>
<tr>
<td>:url</td>
<td>path to swagger endpoint, defaults to <code>/swagger.json</code></td>
</tr>
<tr>
<td>:path</td>
<td>optional path to mount the handler to. Works only if mounted outside of a router.</td>
</tr>
<tr>
<td>:config</td>
<td>parameters passed to swaggger-ui, keys transformed into camelCase. See <ahref="https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/configuration.md"target="_blank">the docs</a></td>
</tr>
</tbody>
</table>
<p>We use swagger-ui from <ahref="https://github.com/metosin/ring-swagger-ui"target="_blank">ring-swagger-ui</a>, which can be easily configured from routing application. It stores files <code>swagger-ui</code> in the resource classpath.</p>
<p>Webjars also hosts a <ahref="https://github.com/webjars/swagger-ui"target="_blank">version</a> of the swagger-ui.</p>
<p><strong>NOTE</strong>: Currently, swagger-ui module is just for Clojure. ClojureScript-support welcome as a PR!</p>
<h2id="examples">Examples</h2>
<h3id="simple-example">Simple example</h3>
<ul>
<li>two routes in a single swagger-api <code>::api</code></li>
<li>swagger-spec served from <code>"/swagger.json"</code></li>
<li>swagger-ui mounted to <code>"/"</code></li>
{<spanclass="hljs-symbol">:data</span> {<spanclass="hljs-symbol">:swagger</span> {<spanclass="hljs-symbol">:id</span><spanclass="hljs-symbol">::api</span>}}}) <spanclass="hljs-comment">;; for all routes</span>
<li><code>clojure.spec</code> and <code>Schema</code> coercion</li>
<li>swagger data (<code>:tags</code>, <code>:produces</code>, <code>:consumes</code>)</li>
<li>swagger-spec served from <code>"/api/swagger.json"</code></li>
<li>swagger-ui mounted to <code>"/"</code></li>
<li><ahref="https://github.com/metosin/muuntaja"target="_blank">Muuntaja</a> for request & response formatting</li>
<li><code>wrap-params</code> to capture query & path parameters</li>
<li>missed routes are handled by <code>create-default-handler</code></li>
<li>served via <ahref="https://github.com/ring-clojure/ring/tree/master/ring-jetty-adapter"target="_blank">ring-jetty</a></li>
</ul>
<p>Whole example project is in <ahref="https://github.com/metosin/reitit/tree/master/examples/ring-swagger"target="_blank"><code>/examples/ring-swagger</code></a>.</p>
<spanclass="hljs-symbol">:body</span> {<spanclass="hljs-symbol">:total</span> (<spanclass="hljs-name"><spanclass="hljs-builtin-name">+</span></span> x y)}})}}]]
<spanclass="hljs-symbol">:body</span> {<spanclass="hljs-symbol">:total</span> (<spanclass="hljs-name"><spanclass="hljs-builtin-name">+</span></span> x y)}})}}]]]
<p>Route data in path <code>[:swagger :id]</code> can be either a keyword or a sequence of keywords. This enables one route to be part of multiple swagger apis. Normal route data <ahref="../basics/route_data.html#nested-route-data">scoping rules</a> rules apply.</p>
<p>Example with:</p>
<ul>
<li>4 routes</li>
<li>2 swagger apis <code>::one</code> and <code>::two</code></li>
<li>create a data-driven version of <ahref="https://github.com/metosin/muuntaja"target="_blank">Muuntaja</a> that integrates into <code>:produces</code> and <code>:consumes</code></li>
<li>ClojureScript<ul>
<li>example for <ahref="https://github.com/macchiato-framework"target="_blank">Macchiato</a></li>
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