juniper/iron/middleware/trait.AroundMiddleware.html

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2016-09-11 13:41:24 -05:00
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<h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>iron</a>::<wbr><a href='index.html'>middleware</a>::<wbr><a class='trait' href=''>AroundMiddleware</a></span><span class='out-of-band'><span id='render-detail'>
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<pre class='rust trait'>pub trait AroundMiddleware {
fn <a href='#tymethod.around' class='fnname'>around</a>(self, handler: <a class='struct' href='https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html' title='alloc::boxed::Box'>Box</a>&lt;<a class='trait' href='../../iron/middleware/trait.Handler.html' title='iron::middleware::Handler'>Handler</a>&gt;) -&gt; <a class='struct' href='https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html' title='alloc::boxed::Box'>Box</a>&lt;<a class='trait' href='../../iron/middleware/trait.Handler.html' title='iron::middleware::Handler'>Handler</a>&gt;;
}</pre><div class='docblock'><p>AroundMiddleware are used to wrap and replace the <code>Handler</code> in a <code>Chain</code>.</p>
<p>AroundMiddleware produce <code>Handler</code>s through their <code>around</code> method, which is
called once on insertion into a Chain or can be called manually outside of a
<code>Chain</code>.</p>
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<h2 id='required-methods'>Required Methods</h2>
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<h3 id='tymethod.around' class='method stab '><code>fn <a href='#tymethod.around' class='fnname'>around</a>(self, handler: <a class='struct' href='https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html' title='alloc::boxed::Box'>Box</a>&lt;<a class='trait' href='../../iron/middleware/trait.Handler.html' title='iron::middleware::Handler'>Handler</a>&gt;) -&gt; <a class='struct' href='https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html' title='alloc::boxed::Box'>Box</a>&lt;<a class='trait' href='../../iron/middleware/trait.Handler.html' title='iron::middleware::Handler'>Handler</a>&gt;</code></h3><div class='docblock'><p>Produce a <code>Handler</code> from this <code>AroundMiddleware</code> given another <code>Handler</code>.</p>
<p>Usually this means wrapping the handler and editing the <code>Request</code> on the
way in and the <code>Response</code> on the way out.</p>
<p>This is called only once, when an <code>AroundMiddleware</code> is added to a <code>Chain</code>
using <code>Chain::around</code>, it is passed the <code>Chain</code>&#39;s current <code>Handler</code>.</p>
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<h2 id='implementors'>Implementors</h2>
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<li><code>impl&lt;F&gt; AroundMiddleware for F <span class='where'>where F: <a class='trait' href='https://doc.rust-lang.org/nightly/core/ops/trait.FnOnce.html' title='core::ops::FnOnce'>FnOnce</a>(<a class='struct' href='https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html' title='alloc::boxed::Box'>Box</a>&lt;<a class='trait' href='../../iron/middleware/trait.Handler.html' title='iron::middleware::Handler'>Handler</a>&gt;) -&gt; <a class='struct' href='https://doc.rust-lang.org/nightly/alloc/boxed/struct.Box.html' title='alloc::boxed::Box'>Box</a>&lt;<a class='trait' href='../../iron/middleware/trait.Handler.html' title='iron::middleware::Handler'>Handler</a>&gt;</span></code></li>
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