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<h1 id="default-middleware">Default Middleware</h1>
<pre><code class="lang-clj">[metosin/reitit-middleware <span class="hljs-string">&quot;0.5.1&quot;</span>]
</code></pre>
<p>Any Ring middleware can be used with <code>reitit-ring</code>, but using data-driven middleware is preferred as they are easier to manage and in many cases, yield better performance. <code>reitit-middleware</code> contains a set of common ring middleware, lifted into data-driven middleware.</p>
<ul>
<li><a href="#parameters-handling">Parameter Handling</a></li>
<li><a href="#exception-handling">Exception Handling</a></li>
<li><a href="#content-negotiation">Content Negotiation</a></li>
<li><a href="#multipart-request-handling">Multipart Request Handling</a></li>
<li><a href="#inspecting-middleware-chain">Inspecting Middleware Chain</a></li>
</ul>
<h2 id="parameters-handling">Parameters Handling</h2>
<p><code>reitit.ring.middleware.parameters/parameters-middleware</code> to capture query- and form-params. Wraps
<code>ring.middleware.params/wrap-params</code>.</p>
<p><strong>NOTE</strong>: will be factored into two parts: a query-parameters middleware and a Muuntaja format responsible for the the <code>application/x-www-form-urlencoded</code> body format.</p>
<h2 id="exception-handling">Exception Handling</h2>
<p>See <a href="exceptions.html">Exception Handling with Ring</a>.</p>
<h2 id="multipart-request-handling">Multipart Request Handling</h2>
<p>Wrapper for <a href="https://github.com/ring-clojure/ring/blob/master/ring-core/src/ring/middleware/multipart_params.clj" target="_blank">Ring Multipart Middleware</a>. Emits swagger <code>:consumes</code> definitions automatically.</p>
<p>Expected route data:</p>
<table>
<thead>
<tr>
<th>key</th>
<th>description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>[:parameters :multipart]</code></td>
<td>mounts only if defined for a route.</td>
</tr>
</tbody>
</table>
<pre><code class="lang-clj">(<span class="hljs-name">require</span> &apos;[reitit.ring.middleware.multipart <span class="hljs-symbol">:as</span> multipart])
</code></pre>
<ul>
<li><code>multipart/multipart-middleware</code> a preconfigured middleware for multipart handling</li>
<li><code>multipart/create-multipart-middleware</code> to generate with custom configuration</li>
</ul>
<h2 id="inspecting-middleware-chain">Inspecting Middleware Chain</h2>
<p><code>reitit.ring.middleware.dev/print-request-diffs</code> is a <a href="transforming_middleware_chain.html">middleware chain transforming function</a>. It prints a request and response diff between each middleware. To use it, add the following router option:</p>
<pre><code class="lang-clj">:reitit.middleware/transform reitit.ring.middleware.dev/print-request-diffs
</code></pre>
<p>Partial sample output:</p>
<p><img src="../images/ring-request-diff.png" alt="Opensensors perf test"></p>
<h2 id="example-app">Example app</h2>
<p>See an example app with the default middleware in action: <a href="https://github.com/metosin/reitit/blob/master/examples/ring-swagger/src/example/server.clj" target="_blank">https://github.com/metosin/reitit/blob/master/examples/ring-swagger/src/example/server.clj</a>.</p>
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