juniper/iron/modifiers/index.html

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2016-09-11 13:41:24 -05:00
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<h1 class='fqn'><span class='in-band'>Module <a href='../index.html'>iron</a>::<wbr><a class='mod' href=''>modifiers</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>&#x2212;</span>]
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<div class='docblock'><p>This module defines a series of convenience modifiers for changing
Responses.</p>
<p>Modifiers can be used to edit <code>Response</code>s through the owning method <code>set</code>
or the mutating <code>set_mut</code>, both of which are defined in the <code>Set</code> trait.</p>
<p>For Iron, the <code>Modifier</code> interface offers extensible and ergonomic response
creation while avoiding the introduction of many highly specific <code>Response</code>
constructors.</p>
<p>The simplest case of a modifier is probably the one used to change the
return status code:</p>
<pre class='rust rust-example-rendered'>
<span class='kw'>let</span> <span class='ident'>r</span> <span class='op'>=</span> <span class='ident'>Response</span>::<span class='ident'>with</span>(<span class='ident'>status</span>::<span class='ident'>NotFound</span>);
<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>r</span>.<span class='ident'>status</span>.<span class='ident'>unwrap</span>().<span class='ident'>to_u16</span>(), <span class='number'>404</span>);</pre>
<p>You can also pass in a tuple of modifiers, they will all be applied. Here&#39;s
an example of a modifier 2-tuple that will change the status code and the
body message:</p>
<pre class='rust rust-example-rendered'>
<span class='ident'>Response</span>::<span class='ident'>with</span>((<span class='ident'>status</span>::<span class='ident'>ImATeapot</span>, <span class='string'>&quot;I am a tea pot!&quot;</span>));</pre>
<p>There is also a <code>Redirect</code> modifier:</p>
<pre class='rust rust-example-rendered'>
<span class='kw'>let</span> <span class='ident'>url</span> <span class='op'>=</span> <span class='ident'>Url</span>::<span class='ident'>parse</span>(<span class='string'>&quot;http://doc.rust-lang.org&quot;</span>).<span class='ident'>unwrap</span>();
<span class='ident'>Response</span>::<span class='ident'>with</span>((<span class='ident'>status</span>::<span class='ident'>Found</span>, <span class='ident'>modifiers</span>::<span class='ident'>Redirect</span>(<span class='ident'>url</span>)));</pre>
<p>The modifiers are applied depending on their type. Currently the easiest
way to see how different types are used as modifiers, take a look at <a href="https://github.com/iron/iron/blob/master/src/modifiers.rs">the
source code</a>.</p>
<p>For more information about the modifier system, see
<a href="https://github.com/reem/rust-modifier">rust-modifier</a>.</p>
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
<table>
<tr class=' module-item'>
<td><a class='struct' href='struct.Header.html'
title='iron::modifiers::Header'>Header</a></td>
<td class='docblock short'>
<p>A modifier for changing headers on requests and responses.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class='struct' href='struct.Redirect.html'
title='iron::modifiers::Redirect'>Redirect</a></td>
<td class='docblock short'>
<p>A modifier for creating redirect responses.</p>
</td>
</tr>
<tr class=' module-item'>
<td><a class='struct' href='struct.RedirectRaw.html'
title='iron::modifiers::RedirectRaw'>RedirectRaw</a></td>
<td class='docblock short'>
<p>A modifier for creating redirect responses.</p>
</td>
</tr></table></section>
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