202 lines
48 KiB
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202 lines
48 KiB
HTML
<!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">☰</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<T></a><a href="#impl-BorrowMut%3CT%3E">BorrowMut<T></a><a href="#impl-From%3CT%3E">From<T></a><a href="#impl-Into%3CU%3E">Into<U></a><a href="#impl-TryFrom%3CU%3E">TryFrom<U></a><a href="#impl-TryInto%3CU%3E">TryInto<U></a><a href="#impl-VZip%3CV%3E">VZip<V></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'>−</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<T, B> { /* fields omitted */ }</pre></div><div class='docblock'><p>Application builder - structure that follows the builder pattern
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for building application instances.</p>
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</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><AppEntry, <a class="enum" href="../actix_web/dev/enum.Body.html" title="enum actix_web::dev::Body">Body</a>></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>() -> 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>
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</div></div><h3 id='impl-1' class='impl'><code class='in-band'>impl<T, B> <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a><T, B> <span class="where fmt-newline">where<br> B: <a class="trait" href="../actix_web/dev/trait.MessageBody.html" title="trait actix_web::dev::MessageBody">MessageBody</a>,<br> T: <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a><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><B>, 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>>, </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><U: 'static>(self, data: U) -> 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
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by using <code>Data<T></code> extractor where <code>T</code> is data type.</p>
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<p><strong>Note</strong>: http server accepts an application factory rather than
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an application instance. Http server constructs an application
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instance for each thread, thus application data must be constructed
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multiple times. If you want to share data between different
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threads, a shared object should be used, e.g. <code>Arc</code>. Application
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data does not need to be <code>Send</code> or <code>Sync</code>.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">cell</span>::<span class="ident">Cell</span>;
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<span class="kw">use</span> <span class="ident">actix_web</span>::{<span class="ident">web</span>, <span class="ident">App</span>};
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<span class="kw">struct</span> <span class="ident">MyData</span> {
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<span class="ident">counter</span>: <span class="ident">Cell</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>,
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}
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<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"><</span><span class="ident">MyData</span><span class="op">></span>) {
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<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>);
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
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.<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>) })
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.<span class="ident">service</span>(
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<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">"/index.html"</span>).<span class="ident">route</span>(
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<span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>)));
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}</pre></div>
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</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><F, Out>(self, data: F) -> Self <span class="where fmt-newline">where<br> 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>() -> Out + 'static,<br> Out: <a class="trait" href="../futures/future/trait.IntoFuture.html" title="trait futures::future::IntoFuture">IntoFuture</a> + 'static,<br> 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>, </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
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similar to <code>.data()</code> but it accepts data factory. Data object get
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constructed asynchronously during application initialization.</p>
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</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><U: 'static>(self, data: <a class="struct" href="../actix_web/web/struct.Data.html" title="struct actix_web::web::Data">Data</a><U>) -> 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
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by using <code>Data<T></code> extractor where <code>T</code> is data type.</p>
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</div><h4 id='method.configure' class="method"><code id='configure.v'>pub fn <a href='#method.configure' class='fnname'>configure</a><F>(self, f: F) -> Self <span class="where fmt-newline">where<br> 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>(&mut <a class="struct" href="../actix_web/web/struct.ServiceConfig.html" title="struct actix_web::web::ServiceConfig">ServiceConfig</a>), </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
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process</p>
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<p>This function is useful for moving parts of configuration to a
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different module or even library. For example,
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some of the resource's configuration could be moved to different module.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<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>};
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<span class="comment">// this function could be located in different module</span>
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<span class="kw">fn</span> <span class="ident">config</span>(<span class="ident">cfg</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">web</span>::<span class="ident">ServiceConfig</span>) {
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<span class="ident">cfg</span>.<span class="ident">service</span>(<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">"/test"</span>)
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.<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>()))
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.<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>()))
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);
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
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.<span class="ident">wrap</span>(<span class="ident">middleware</span>::<span class="ident">Logger</span>::<span class="ident">default</span>())
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.<span class="ident">configure</span>(<span class="ident">config</span>) <span class="comment">// <- register resources</span>
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.<span class="ident">route</span>(<span class="string">"/index.html"</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>()));
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}</pre></div>
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</div><h4 id='method.route' class="method"><code id='route.v'>pub fn <a href='#method.route' class='fnname'>route</a>(self, path: &<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>) -> 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>
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<p>This is a simplified version of the <code>App::service()</code> method.
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This method can be used multiple times with same path, in that case
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multiple resources with one route would be registered for same resource path.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<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>};
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<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"><</span>(<span class="ident">String</span>, <span class="ident">String</span>)<span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> {
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<span class="string">"Welcome!"</span>
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
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.<span class="ident">route</span>(<span class="string">"/test1"</span>, <span class="ident">web</span>::<span class="ident">get</span>().<span class="ident">to</span>(<span class="ident">index</span>))
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.<span class="ident">route</span>(<span class="string">"/test2"</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>()));
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}</pre></div>
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</div><h4 id='method.service' class="method"><code id='service.v'>pub fn <a href='#method.service' class='fnname'>service</a><F>(self, factory: F) -> Self <span class="where fmt-newline">where<br> F: <a class="trait" href="../actix_web/dev/trait.HttpServiceFactory.html" title="trait actix_web::dev::HttpServiceFactory">HttpServiceFactory</a> + 'static, </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>
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<p>Http service is any type that implements <code>HttpServiceFactory</code> trait.</p>
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<p>Actix web provides several services implementations:</p>
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<ul>
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<li><em>Resource</em> is an entry in resource table which corresponds to requested URL.</li>
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<li><em>Scope</em> is a set of resources with common root path.</li>
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<li>"StaticFiles" is a service for static files support</li>
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</ul>
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</div><h4 id='method.hostname' class="method"><code id='hostname.v'>pub fn <a href='#method.hostname' class='fnname'>hostname</a>(self, val: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> 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>
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<p>Host name is used by application router as a hostname for url
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generation. Check [ConnectionInfo](./dev/struct.ConnectionInfo.
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html#method.host) documentation for more information.</p>
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<p>By default host name is set to a "localhost" value.</p>
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</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><F, U>(self, f: F) -> Self <span class="where fmt-newline">where<br> F: <a class="trait" href="../actix_service/trait.IntoNewService.html" title="trait actix_service::IntoNewService">IntoNewService</a><U>,<br> U: <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a><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>> + 'static,<br> 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>, </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>
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<p>It is possible to use services like <code>Resource</code>, <code>Route</code>.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<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>};
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<span class="kw">fn</span> <span class="ident">index</span>() <span class="op">-</span><span class="op">></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> {
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<span class="string">"Welcome!"</span>
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}
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
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.<span class="ident">service</span>(
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<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">"/index.html"</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>)))
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.<span class="ident">default_service</span>(
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<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>()));
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}</pre></div>
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<p>It is also possible to use static files as default service.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered">
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<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>};
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<span class="kw">fn</span> <span class="ident">main</span>() {
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<span class="kw">let</span> <span class="ident">app</span> <span class="op">=</span> <span class="ident">App</span>::<span class="ident">new</span>()
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.<span class="ident">service</span>(
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<span class="ident">web</span>::<span class="ident">resource</span>(<span class="string">"/index.html"</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>()))
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.<span class="ident">default_service</span>(
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<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>())
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);
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}</pre></div>
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</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><N, U>(self, name: N, url: U) -> Self <span class="where fmt-newline">where<br> N: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>,<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>, </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>
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<p>External resources are useful for URL generation purposes only
|
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and are never considered for matching at request time. Calls to
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<code>HttpRequest::url_for()</code> will work as expected.</p>
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|
||
<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">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">HttpResponse</span><span class="op">></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">"youtube"</span>, <span class="kw-2">&</span>[<span class="string">"asdlkjqme"</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">"https://youtube.com/watch/asdlkjqme"</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">"/index.html"</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">"youtube"</span>, <span class="string">"https://youtube.com/watch/{video_id}"</span>);
|
||
}</pre></div>
|
||
</div><h4 id='method.wrap' class="method"><code id='wrap.v'>pub fn <a href='#method.wrap' class='fnname'>wrap</a><M, B1, F>(<br> self, <br> mw: F<br>) -> <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a><impl <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a><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><B1>, 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>>, B1> <span class="where fmt-newline">where<br> M: <a class="trait" href="../actix_web/dev/trait.Transform.html" title="trait actix_web::dev::Transform">Transform</a><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><B1>, 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>>,<br> B1: <a class="trait" href="../actix_web/dev/trait.MessageBody.html" title="trait actix_web::dev::MessageBody">MessageBody</a>,<br> F: <a class="trait" href="../actix_service/transform/trait.IntoTransform.html" title="trait actix_service::transform::IntoTransform">IntoTransform</a><M, T::<a class="type" href="../actix_service/trait.NewService.html#associatedtype.Service" title="type actix_service::NewService::Service">Service</a>>, </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 -> 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">></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> {
|
||
<span class="string">"Welcome!"</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">"/index.html"</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><B1, F, R>(<br> self, <br> mw: F<br>) -> <a class="struct" href="../actix_web/struct.App.html" title="struct actix_web::App">App</a><impl <a class="trait" href="../actix_service/trait.NewService.html" title="trait actix_service::NewService">NewService</a><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><B1>, 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>>, B1> <span class="where fmt-newline">where<br> B1: <a class="trait" href="../actix_web/dev/trait.MessageBody.html" title="trait actix_web::dev::MessageBody">MessageBody</a>,<br> 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>, &mut T::<a class="type" href="../actix_service/trait.NewService.html#associatedtype.Service" title="type actix_service::NewService::Service">Service</a>) -> R + <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,<br> R: <a class="trait" href="../futures/future/trait.IntoFuture.html" title="trait futures::future::IntoFuture">IntoFuture</a><Item = <a class="struct" href="../actix_web/dev/struct.ServiceResponse.html" title="struct actix_web::dev::ServiceResponse">ServiceResponse</a><B1>, Error = <a class="struct" href="../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>>, </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 -> 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">></span> <span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span> {
|
||
<span class="string">"Welcome!"</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">"text/plain"</span>),
|
||
);
|
||
<span class="ident">res</span>
|
||
}))
|
||
.<span class="ident">route</span>(<span class="string">"/index.html"</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<T, B> !<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><T, B></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<T, B> !<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><T, B></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<T, B> !<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><T, B></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<T, B> <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><T, B> <span class="where fmt-newline">where<br> B: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>, </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<T, B> !<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><T, B></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<T> <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> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </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>(&self) -> <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<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </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>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</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<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T <span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>, </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>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&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<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> 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) -> 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<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>, </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) -> 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<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>, </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) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<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><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<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T <span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>, </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> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<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>
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</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) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<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><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>
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</div></div><h3 id='impl-VZip%3CV%3E' class='impl'><code class='in-band'>impl<V, T> <a class="trait" href="../ppv_lite86/types/types/trait.VZip.html" title="trait ppv_lite86::types::types::VZip">VZip</a><V> for T <span class="where fmt-newline">where<br> V: <a class="trait" href="../ppv_lite86/types/types/trait.MultiLane.html" title="trait ppv_lite86::types::types::MultiLane">MultiLane</a><T>, </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) -> 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> |