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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `App` struct in crate `actix_web`."><meta name="keywords" content="rust, rustlang, rust-lang, App"><title>actix_web::App - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script><noscript><link rel="stylesheet" href="../noscript.css"></noscript><link rel="shortcut icon" href="../favicon.ico"><style type="text/css">#crate-search{background-image:url("../down-arrow.svg");}</style></head><body class="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../actix_web/index.html'><div class='logo-container'><img src='../rust-logo.png' alt='logo'></div></a><p class='location'>Struct App</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#methods">Methods</a><div class="sidebar-links"><a href="#method.configure">configure</a><a href="#method.data">data</a><a href="#method.data_factory">data_factory</a><a href="#method.default_service">default_service</a><a href="#method.external_resource">external_resource</a><a href="#method.hostname">hostname</a><a href="#method.new">new</a><a href="#method.register_data">register_data</a><a href="#method.route">route</a><a href="#method.service">service</a><a href="#method.wrap">wrap</a><a href="#method.wrap_fn">wrap_fn</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">!RefUnwindSafe</a><a href="#impl-Send">!Send</a><a href="#impl-Sync">!Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">!UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow&lt;T&gt;</a><a href="#impl-BorrowMut%3CT%3E">BorrowMut&lt;T&gt;</a><a href="#impl-From%3CT%3E">From&lt;T&gt;</a><a href="#impl-Into%3CU%3E">Into&lt;U&gt;</a><a href="#impl-TryFrom%3CU%3E">TryFrom&lt;U&gt;</a><a href="#impl-TryInto%3CU%3E">TryInto&lt;U&gt;</a><a href="#impl-VZip%3CV%3E">VZip&lt;V&gt;</a></div></div><p class='location'><a href='index.html'>actix_web</a></p><script>window.sidebarCurrent = {name: 'App', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press S to search, ? for more options…" type="search"></div><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>&#x2212;</span>]</a></span><a class='srclink' href='../src/actix_web/app.rs.html#31-41' title='goto source code'>[src]</a></span><span class='in-band'>Struct <a href='index.html'>actix_web</a>::<wbr><a class="struct" href=''>App</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class='rust struct'>pub struct App&lt;T, B&gt; { /* fields omitted */ }</pre></div><div class='docblock'><p>Application builder - structure that follows the builder pattern
for building application instances.</p>
</div><h2 id='methods' class='small-section-header'>Methods<a href='#methods' class='anchor'></a></h2><h3 id='impl' class='impl'><code class='in-band'>impl <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;AppEntry, <a class="enum" href="../actix_web/dev/enum.Body.html" title="enum actix_web::dev::Body">Body</a>&gt;</code><a href='#impl' class='anchor'></a><a class='srclink' href='../src/actix_web/app.rs.html#43-59' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.new' class="method"><code id='new.v'>pub fn <a href='#method.new' class='fnname'>new</a>() -&gt; Self</code><a class='srclink' href='../src/actix_web/app.rs.html#45-58' title='goto source code'>[src]</a></h4><div class='docblock'><p>Create application builder. Application can be configured with a builder-like pattern.</p>
</div></div><h3 id='impl-1' class='impl'><code class='in-band'>impl&lt;T, B&gt; <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;T, B&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;B: <a class="trait" href="../actix_web/dev/trait.MessageBody.html" title="trait actix_web::dev::MessageBody">MessageBody</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a>&lt;Config = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Request = <a class="struct" href="../actix_web/dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, Response = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a>&lt;B&gt;, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>, InitError = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;,&nbsp;</span></code><a href='#impl-1' class='anchor'></a><a class='srclink' href='../src/actix_web/app.rs.html#61-440' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.data' class="method"><code id='data.v'>pub fn <a href='#method.data' class='fnname'>data</a>&lt;U:&nbsp;'static&gt;(self, data: U) -&gt; Self</code><a class='srclink' href='../src/actix_web/app.rs.html#102-105' title='goto source code'>[src]</a></h4><div class='docblock'><p>Set application data. Application data could be accessed
by using <code>Data&lt;T&gt;</code> extractor where <code>T</code> is data type.</p>
<p><strong>Note</strong>: http server accepts an application factory rather than
an application instance. Http server constructs an application
instance for each thread, thus application data must be constructed
multiple times. If you want to share data between different
threads, a shared object should be used, e.g. <code>Arc</code>. Application
data does not need to be <code>Send</code> or <code>Sync</code>.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">cell</span>::<span class="ident">Cell</span>;
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>};
<span class="kw">struct</span> <span class="ident">MyData</span> {
<span class="ident">counter</span>: <span class="ident">Cell</span><span class="op">&lt;</span><span class="ident">usize</span><span class="op">&gt;</span>,
}
<span class="kw">fn</span> <span class="ident">index</span>(<span class="ident">data</span>: <span class="ident">web</span>::<span class="ident">Data</span><span class="op">&lt;</span><span class="ident">MyData</span><span class="op">&gt;</span>) {
<span class="ident">data</span>.<span class="ident">counter</span>.<span class="ident">set</span>(<span class="ident">data</span>.<span class="ident">counter</span>.<span class="ident">get</span>() <span class="op">+</span> <span class="number">1</span>);
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">data</span>(<span class="ident">MyData</span>{ <span class="ident">counter</span>: <span class="ident">Cell</span>::<span class="ident">new</span>(<span class="number">0</span>) })
.<span class="ident">service</span>(
<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">&quot;/index.html&quot;</span>).<span class="ident">route</span>(
<span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>)));
}</pre></div>
</div><h4 id='method.data_factory' class="method"><code id='data_factory.v'>pub fn <a href='#method.data_factory' class='fnname'>data_factory</a>&lt;F, Out&gt;(self, data: F) -&gt; Self <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>() -&gt; Out + 'static,<br>&nbsp;&nbsp;&nbsp;&nbsp;Out: <a class="trait" href="../futures/future/trait.IntoFuture.html" title="trait futures::future::IntoFuture">IntoFuture</a> + 'static,<br>&nbsp;&nbsp;&nbsp;&nbsp;Out::<a class="type" href="../futures/future/trait.IntoFuture.html#associatedtype.Error" title="type futures::future::IntoFuture::Error">Error</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#110-130' title='goto source code'>[src]</a></h4><div class='docblock'><p>Set application data factory. This function is
similar to <code>.data()</code> but it accepts data factory. Data object get
constructed asynchronously during application initialization.</p>
</div><h4 id='method.register_data' class="method"><code id='register_data.v'>pub fn <a href='#method.register_data' class='fnname'>register_data</a>&lt;U:&nbsp;'static&gt;(self, data: <a class="struct" href="../actix_web/web/struct.Data.html" title="struct actix_web::web::Data">Data</a>&lt;U&gt;) -&gt; Self</code><a class='srclink' href='../src/actix_web/app.rs.html#134-137' title='goto source code'>[src]</a></h4><div class='docblock'><p>Set application data. Application data could be accessed
by using <code>Data&lt;T&gt;</code> extractor where <code>T</code> is data type.</p>
</div><h4 id='method.configure' class="method"><code id='configure.v'>pub fn <a href='#method.configure' class='fnname'>configure</a>&lt;F&gt;(self, f: F) -&gt; Self <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnOnce.html" title="trait core::ops::function::FnOnce">FnOnce</a>(&amp;mut <a class="struct" href="../actix_web/web/struct.ServiceConfig.html" title="struct actix_web::web::ServiceConfig">ServiceConfig</a>),&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#165-175' title='goto source code'>[src]</a></h4><div class='docblock'><p>Run external configuration as part of the application building
process</p>
<p>This function is useful for moving parts of configuration to a
different module or even library. For example,
some of the resource's configuration could be moved to different module.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">middleware</span>, <span class="ident">App</span>, <span class="ident">HttpResponse</span>};
<span class="comment">// this function could be located in different module</span>
<span class="kw">fn</span> <span class="ident">config</span>(<span class="ident">cfg</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">web</span>::<span class="ident">ServiceConfig</span>) {
<span class="ident">cfg</span>.<span class="ident">service</span>(<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">&quot;/test&quot;</span>)
.<span class="ident">route</span>(<span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="prelude-val">Ok</span>()))
.<span class="ident">route</span>(<span class="ident">web</span>::<span class="ident">head</span>().<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="ident">MethodNotAllowed</span>()))
);
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">wrap</span>(<span class="ident">middleware</span>::<span class="ident">Logger</span>::<span class="ident">default</span>())
.<span class="ident">configure</span>(<span class="ident">config</span>) <span class="comment">// &lt;- register resources</span>
.<span class="ident">route</span>(<span class="string">&quot;/index.html&quot;</span>, <span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="prelude-val">Ok</span>()));
}</pre></div>
</div><h4 id='method.route' class="method"><code id='route.v'>pub fn <a href='#method.route' class='fnname'>route</a>(self, path: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, route: <a class="struct" href="../actix_web/struct.Route.html" title="struct actix_web::Route">Route</a>) -&gt; Self</code><a class='srclink' href='../src/actix_web/app.rs.html#196-202' title='goto source code'>[src]</a></h4><div class='docblock'><p>Configure route for a specific path.</p>
<p>This is a simplified version of the <code>App::service()</code> method.
This method can be used multiple times with same path, in that case
multiple resources with one route would be registered for same resource path.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>, <span class="ident">HttpResponse</span>};
<span class="kw">fn</span> <span class="ident">index</span>(<span class="ident">data</span>: <span class="ident">web</span>::<span class="ident">Path</span><span class="op">&lt;</span>(<span class="ident">String</span>, <span class="ident">String</span>)<span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
<span class="string">&quot;Welcome!&quot;</span>
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">route</span>(<span class="string">&quot;/test1&quot;</span>, <span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>))
.<span class="ident">route</span>(<span class="string">&quot;/test2&quot;</span>, <span class="ident">web</span>::<span class="ident">post</span>().<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="ident">MethodNotAllowed</span>()));
}</pre></div>
</div><h4 id='method.service' class="method"><code id='service.v'>pub fn <a href='#method.service' class='fnname'>service</a>&lt;F&gt;(self, factory: F) -&gt; Self <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="../actix_web/dev/trait.HttpServiceFactory.html" title="trait actix_web::dev::HttpServiceFactory">HttpServiceFactory</a> + 'static,&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#213-220' title='goto source code'>[src]</a></h4><div class='docblock'><p>Register http service.</p>
<p>Http service is any type that implements <code>HttpServiceFactory</code> trait.</p>
<p>Actix web provides several services implementations:</p>
<ul>
<li><em>Resource</em> is an entry in resource table which corresponds to requested URL.</li>
<li><em>Scope</em> is a set of resources with common root path.</li>
<li>&quot;StaticFiles&quot; is a service for static files support</li>
</ul>
</div><h4 id='method.hostname' class="method"><code id='hostname.v'>pub fn <a href='#method.hostname' class='fnname'>hostname</a>(self, val: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -&gt; Self</code><a class='srclink' href='../src/actix_web/app.rs.html#229-232' title='goto source code'>[src]</a></h4><div class='docblock'><p>Set server host name.</p>
<p>Host name is used by application router as a hostname for url
generation. Check [ConnectionInfo](./dev/struct.ConnectionInfo.
html#method.host) documentation for more information.</p>
<p>By default host name is set to a &quot;localhost&quot; value.</p>
</div><h4 id='method.default_service' class="method"><code id='default_service.v'>pub fn <a href='#method.default_service' class='fnname'>default_service</a>&lt;F, U&gt;(self, f: F) -&gt; Self <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="../actix_service/trait.IntoNewService.html" title="trait actix_service::IntoNewService">IntoNewService</a>&lt;U&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a>&lt;Config = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Request = <a class="struct" href="../actix_web/dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, Response = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a>, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>&gt; + 'static,<br>&nbsp;&nbsp;&nbsp;&nbsp;U::<a class="type" href="../actix_service/trait.NewService.html#associatedtype.InitError" title="type actix_service::NewService::InitError">InitError</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#268-287' title='goto source code'>[src]</a></h4><div class='docblock'><p>Default service to be used if no matching resource could be found.</p>
<p>It is possible to use services like <code>Resource</code>, <code>Route</code>.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>, <span class="ident">HttpResponse</span>};
<span class="kw">fn</span> <span class="ident">index</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
<span class="string">&quot;Welcome!&quot;</span>
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">service</span>(
<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">&quot;/index.html&quot;</span>).<span class="ident">route</span>(<span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>)))
.<span class="ident">default_service</span>(
<span class="ident">web</span>::<span class="ident">route</span>().<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="ident">NotFound</span>()));
}</pre></div>
<p>It is also possible to use static files as default service.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>, <span class="ident">HttpResponse</span>};
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">service</span>(
<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">&quot;/index.html&quot;</span>).<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="prelude-val">Ok</span>()))
.<span class="ident">default_service</span>(
<span class="ident">web</span>::<span class="ident">to</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">HttpResponse</span>::<span class="ident">NotFound</span>())
);
}</pre></div>
</div><h4 id='method.external_resource' class="method"><code id='external_resource.v'>pub fn <a href='#method.external_resource' class='fnname'>external_resource</a>&lt;N, U&gt;(self, name: N, url: U) -&gt; Self <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;N: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>&gt;,&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#311-320' title='goto source code'>[src]</a></h4><div class='docblock'><p>Register an external resource.</p>
<p>External resources are useful for URL generation purposes only
and are never considered for matching at request time. Calls to
<code>HttpRequest::url_for()</code> will work as expected.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>, <span class="ident">HttpRequest</span>, <span class="ident">HttpResponse</span>, <span class="prelude-ty">Result</span>};
<span class="kw">fn</span> <span class="ident">index</span>(<span class="ident">req</span>: <span class="ident">HttpRequest</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">HttpResponse</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">url</span> <span class="op">=</span> <span class="ident">req</span>.<span class="ident">url_for</span>(<span class="string">&quot;youtube&quot;</span>, <span class="kw-2">&amp;</span>[<span class="string">&quot;asdlkjqme&quot;</span>])<span class="question-mark">?</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">url</span>.<span class="ident">as_str</span>(), <span class="string">&quot;https://youtube.com/watch/asdlkjqme&quot;</span>);
<span class="prelude-val">Ok</span>(<span class="ident">HttpResponse</span>::<span class="prelude-val">Ok</span>().<span class="ident">into</span>())
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">service</span>(<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">&quot;/index.html&quot;</span>).<span class="ident">route</span>(
<span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>)))
.<span class="ident">external_resource</span>(<span class="string">&quot;youtube&quot;</span>, <span class="string">&quot;https://youtube.com/watch/{video_id}&quot;</span>);
}</pre></div>
</div><h4 id='method.wrap' class="method"><code id='wrap.v'>pub fn <a href='#method.wrap' class='fnname'>wrap</a>&lt;M, B1, F&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;self, <br>&nbsp;&nbsp;&nbsp;&nbsp;mw: F<br>) -&gt; <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;impl <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a>&lt;Config = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Request = <a class="struct" href="../actix_web/dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, Response = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a>&lt;B1&gt;, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>, InitError = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;, B1&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;M: <a class="trait" href="../actix_web/dev/trait.Transform.html" title="trait actix_web::dev::Transform">Transform</a>&lt;T::<a class="type" href="../actix_service/trait.NewService.html#associatedtype.Service" title="type actix_service::NewService::Service">Service</a>, Request = <a class="struct" href="../actix_web/dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, Response = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a>&lt;B1&gt;, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>, InitError = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;B1: <a class="trait" href="../actix_web/dev/trait.MessageBody.html" title="trait actix_web::dev::MessageBody">MessageBody</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="../actix_service/transform/trait.IntoTransform.html" title="trait actix_service::transform::IntoTransform">IntoTransform</a>&lt;M, T::<a class="type" href="../actix_service/trait.NewService.html#associatedtype.Service" title="type actix_service::NewService::Service">Service</a>&gt;,&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#353-389' title='goto source code'>[src]</a></h4><div class='docblock'><p>Registers middleware, in the form of a middleware component (type),
that runs during inbound and/or outbound processing in the request
lifecycle (request -&gt; response), modifying request/response as
necessary, across all requests managed by the <em>Application</em>.</p>
<p>Use middleware when you need to read or modify <em>every</em> request or
response in some way.</p>
<p>Notice that the keyword for registering middleware is <code>wrap</code>. As you
register middleware using <code>wrap</code> in the App builder, imagine wrapping
layers around an inner App. The first middleware layer exposed to a
Request is the outermost layer-- the <em>last</em> registered in
the builder chain. Consequently, the <em>first</em> middleware registered
in the builder chain is the <em>last</em> to execute during request processing.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_service</span>::<span class="ident">Service</span>;
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">middleware</span>, <span class="ident">web</span>, <span class="ident">App</span>};
<span class="kw">use</span> <span class="ident">actix_web</span>::<span class="ident">http</span>::{<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>, <span class="ident">HeaderValue</span>};
<span class="kw">fn</span> <span class="ident">index</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
<span class="string">&quot;Welcome!&quot;</span>
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">wrap</span>(<span class="ident">middleware</span>::<span class="ident">Logger</span>::<span class="ident">default</span>())
.<span class="ident">route</span>(<span class="string">&quot;/index.html&quot;</span>, <span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>));
}</pre></div>
</div><h4 id='method.wrap_fn' class="method"><code id='wrap_fn.v'>pub fn <a href='#method.wrap_fn' class='fnname'>wrap_fn</a>&lt;B1, F, R&gt;(<br>&nbsp;&nbsp;&nbsp;&nbsp;self, <br>&nbsp;&nbsp;&nbsp;&nbsp;mw: F<br>) -&gt; <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;impl <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a>&lt;Config = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>, Request = <a class="struct" href="../actix_web/dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, Response = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a>&lt;B1&gt;, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>, InitError = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>&gt;, B1&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;B1: <a class="trait" href="../actix_web/dev/trait.MessageBody.html" title="trait actix_web::dev::MessageBody">MessageBody</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="struct" href="../actix_web/dev/struct.ServiceRequest.html" title="struct actix_web::dev::ServiceRequest">ServiceRequest</a>, &amp;mut T::<a class="type" href="../actix_service/trait.NewService.html#associatedtype.Service" title="type actix_service::NewService::Service">Service</a>) -&gt; R + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="../futures/future/trait.IntoFuture.html" title="trait futures::future::IntoFuture">IntoFuture</a>&lt;Item = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a>&lt;B1&gt;, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>&gt;,&nbsp;</span></code><a class='srclink' href='../src/actix_web/app.rs.html#420-439' title='goto source code'>[src]</a></h4><div class='docblock'><p>Registers middleware, in the form of a closure, that runs during inbound
and/or outbound processing in the request lifecycle (request -&gt; response),
modifying request/response as necessary, across all requests managed by
the <em>Application</em>.</p>
<p>Use middleware when you need to read or modify <em>every</em> request or response in some way.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">actix_service</span>::<span class="ident">Service</span>;
<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>};
<span class="kw">use</span> <span class="ident">actix_web</span>::<span class="ident">http</span>::{<span class="ident">header</span>::<span class="ident">CONTENT_TYPE</span>, <span class="ident">HeaderValue</span>};
<span class="kw">fn</span> <span class="ident">index</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span> {
<span class="string">&quot;Welcome!&quot;</span>
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
.<span class="ident">wrap_fn</span>(<span class="op">|</span><span class="ident">req</span>, <span class="ident">srv</span><span class="op">|</span>
<span class="ident">srv</span>.<span class="ident">call</span>(<span class="ident">req</span>).<span class="ident">map</span>(<span class="op">|</span><span class="kw-2">mut</span> <span class="ident">res</span><span class="op">|</span> {
<span class="ident">res</span>.<span class="ident">headers_mut</span>().<span class="ident">insert</span>(
<span class="ident">CONTENT_TYPE</span>, <span class="ident">HeaderValue</span>::<span class="ident">from_static</span>(<span class="string">&quot;text/plain&quot;</span>),
);
<span class="ident">res</span>
}))
.<span class="ident">route</span>(<span class="string">&quot;/index.html&quot;</span>, <span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>));
}</pre></div>
</div></div><h2 id='synthetic-implementations' class='small-section-header'>Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a></h2><div id='synthetic-implementations-list'><h3 id='impl-RefUnwindSafe' class='impl'><code class='in-band'>impl&lt;T, B&gt; !<a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;T, B&gt;</code><a href='#impl-RefUnwindSafe' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Send' class='impl'><code class='in-band'>impl&lt;T, B&gt; !<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;T, B&gt;</code><a href='#impl-Send' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><code class='in-band'>impl&lt;T, B&gt; !<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;T, B&gt;</code><a href='#impl-Sync' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-Unpin' class='impl'><code class='in-band'>impl&lt;T, B&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;T, B&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;B: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,&nbsp;</span></code><a href='#impl-Unpin' class='anchor'></a></h3><div class='impl-items'></div><h3 id='impl-UnwindSafe' class='impl'><code class='in-band'>impl&lt;T, B&gt; !<a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a>&lt;T, B&gt;</code><a href='#impl-UnwindSafe' class='anchor'></a></h3><div class='impl-items'></div></div><h2 id='blanket-implementations' class='small-section-header'>Blanket Implementations<a href='#blanket-implementations' class='anchor'></a></h2><div id='blanket-implementations-list'><h3 id='impl-Any' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href='#impl-Any' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#108-112' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.type_id' class="method hidden"><code id='type_id.v'>fn <a href='https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id' class='fnname'>type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/any.rs.html#109-111' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
</div></div><h3 id='impl-Borrow%3CT%3E' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href='#impl-Borrow%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213-217' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow' class="method hidden"><code id='borrow.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow' class='fnname'>borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214-216' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></div><h3 id='impl-BorrowMut%3CT%3E' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href='#impl-BorrowMut%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#220-224' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.borrow_mut' class="method hidden"><code id='borrow_mut.v'>fn <a href='https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut' class='fnname'>borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#221-223' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></div><h3 id='impl-From%3CT%3E' class='impl'><code class='in-band'>impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</code><a href='#impl-From%3CT%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#564-568' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.from' class="method hidden"><code id='from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from' class='fnname'>from</a>(t: T) -&gt; T</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#565-567' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-Into%3CU%3E' class='impl'><code class='in-band'>impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-Into%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#553-560' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.into' class="method hidden"><code id='into.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into' class='fnname'>into</a>(self) -&gt; U</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#557-559' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-TryFrom%3CU%3E' class='impl'><code class='in-band'>impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-TryFrom%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#601-610' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error' class="type"><code id='Error.t'>type <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error' class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4 id='method.try_from' class="method hidden"><code id='try_from.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from' class='fnname'>try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#607-609' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-TryInto%3CU%3E' class='impl'><code class='in-band'>impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-TryInto%3CU%3E' class='anchor'></a><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#587-596' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='associatedtype.Error-1' class="type"><code id='Error.t-1'>type <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error' class="type">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4 id='method.try_into' class="method hidden"><code id='try_into.v'>fn <a href='https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into' class='fnname'>try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</code><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#593-595' title='goto source code'>[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id='impl-VZip%3CV%3E' class='impl'><code class='in-band'>impl&lt;V, T&gt; <a class="trait" href="../ppv_lite86/types/types/trait.VZip.html" title="trait ppv_lite86::types::types::VZip">VZip</a>&lt;V&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="../ppv_lite86/types/types/trait.MultiLane.html" title="trait ppv_lite86::types::types::MultiLane">MultiLane</a>&lt;T&gt;,&nbsp;</span></code><a href='#impl-VZip%3CV%3E' class='anchor'></a><a class='srclink' href='../src/ppv_lite86/types.rs.html#212-220' title='goto source code'>[src]</a></h3><div class='impl-items'><h4 id='method.vzip' class="method hidden"><code id='vzip.v'>fn <a href='../ppv_lite86/types/types/trait.VZip.html#tymethod.vzip' class='fnname'>vzip</a>(self) -&gt; V</code><a class='srclink' href='../src/ppv_lite86/types.rs.html#217-219' title='goto source code'>[src]</a></h4></div></div></section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../";window.currentCrate = "actix_web";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>