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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 `Handler` trait in crate `actix_web`."><meta name="keywords" content="rust, rustlang, rust-lang, Handler"><title>actix_web::dev::Handler - 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></head><body class="rustdoc trait"><!--[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><p class='location'>Trait Handler</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#associated-types">Associated Types</a><div class="sidebar-links"><a href="#associatedtype.Result">Result</a></div><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.handle">handle</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>actix_web</a>::<wbr><a href='index.html'>dev</a></p><script>window.sidebarCurrent = {name: 'Handler', ty: 'trait', 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 js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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='in-band'>Trait <a href='../index.html'>actix_web</a>::<wbr><a href='index.html'>dev</a>::<wbr><a class="trait" href=''>Handler</a></span><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/handler.rs.html#15-21' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust trait'>pub trait Handler<S>: 'static {
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type <a href='#associatedtype.Result' class="type">Result</a>: <a class="trait" href="../../actix_web/trait.Responder.html" title="trait actix_web::Responder">Responder</a>;
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fn <a href='#tymethod.handle' class='fnname'>handle</a>(&self, req: &<a class="struct" href="../../actix_web/struct.HttpRequest.html" title="struct actix_web::HttpRequest">HttpRequest</a><S>) -> Self::<a class="type" href="../../actix_web/dev/trait.Handler.html#associatedtype.Result" title="type actix_web::dev::Handler::Result">Result</a>;
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}</pre></div><div class='docblock'><p>Trait defines object that could be registered as route handler</p>
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</div>
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<h2 id='associated-types' class='small-section-header'>
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Associated Types<a href='#associated-types' class='anchor'></a>
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</h2>
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<div class='methods'>
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<h3 id='associatedtype.Result' class='method'><span id='Result.t' class='invisible'><code>type <a href='#associatedtype.Result' class="type">Result</a>: <a class="trait" href="../../actix_web/trait.Responder.html" title="trait actix_web::Responder">Responder</a></code></span></h3><div class='docblock'><p>The type of value that handler will return.</p>
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</div></div>
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<h2 id='required-methods' class='small-section-header'>
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Required Methods<a href='#required-methods' class='anchor'></a>
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</h2>
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<div class='methods'>
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<h3 id='tymethod.handle' class='method'><span id='handle.v' class='invisible'><code>fn <a href='#tymethod.handle' class='fnname'>handle</a>(&self, req: &<a class="struct" href="../../actix_web/struct.HttpRequest.html" title="struct actix_web::HttpRequest">HttpRequest</a><S>) -> Self::<a class="type" href="../../actix_web/dev/trait.Handler.html#associatedtype.Result" title="type actix_web::dev::Handler::Result">Result</a></code></span></h3><div class='docblock'><p>Handle request</p>
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</div></div>
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<h2 id='implementors' class='small-section-header'>
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Implementors<a href='#implementors' class='anchor'></a>
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</h2>
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<ul class='item-list' id='implementors-list'>
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<li><table class='table-display'><tbody><tr><td><code>impl<F, R, S> Handler<S> for F <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>(&<a class="struct" href="../../actix_web/struct.HttpRequest.html" title="struct actix_web::HttpRequest">HttpRequest</a><S>) -> R + 'static,<br> R: <a class="trait" href="../../actix_web/trait.Responder.html" title="trait actix_web::Responder">Responder</a> + 'static, </span><span class="where fmt-newline"> type <a href='#associatedtype.Result' class="type">Result</a> = R;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/actix_web/handler.rs.html#203-213' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
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<li><table class='table-display'><tbody><tr><td><code>impl<S> Handler<S> for <a class="struct" href="../../actix_web/http/struct.NormalizePath.html" title="struct actix_web::http::NormalizePath">NormalizePath</a><span class="where fmt-newline"> type <a href='#associatedtype.Result' class="type">Result</a> = <a class="struct" href="../../actix_web/struct.HttpResponse.html" title="struct actix_web::HttpResponse">HttpResponse</a>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/actix_web/helpers.rs.html#86-167' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
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<li><table class='table-display'><tbody><tr><td><code>impl<S: 'static, C: 'static + <a class="trait" href="../../actix_web/fs/trait.StaticFileConfig.html" title="trait actix_web::fs::StaticFileConfig">StaticFileConfig</a>> Handler<S> for <a class="struct" href="../../actix_web/fs/struct.StaticFiles.html" title="struct actix_web::fs::StaticFiles">StaticFiles</a><S, C><span class="where fmt-newline"> type <a href='#associatedtype.Result' class="type">Result</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="../../actix_web/dev/struct.AsyncResult.html" title="struct actix_web::dev::AsyncResult">AsyncResult</a><<a class="struct" href="../../actix_web/struct.HttpResponse.html" title="struct actix_web::HttpResponse">HttpResponse</a>>, <a class="struct" href="../../actix_web/error/struct.Error.html" title="struct actix_web::error::Error">Error</a>>;</span></code><td><div class='out-of-band'><a class='srclink' href='../../src/actix_web/fs.rs.html#780-789' title='goto source code'>[src]</a></div></td></tr></tbody></table></li>
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</ul><script type="text/javascript">window.inlined_types=new Set([]);</script><script type="text/javascript" async
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src="../../implementors/actix_web/dev/trait.Handler.js">
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