<!DOCTYPE html><htmllang="en"><head><metacharset="utf-8"><metaname="viewport"content="width=device-width, initial-scale=1.0"><metaname="generator"content="rustdoc"><metaname="description"content="API documentation for the Rust `Middleware` trait in crate `actix_web`."><metaname="keywords"content="rust, rustlang, rust-lang, Middleware"><title>actix_web::middleware::Middleware - Rust</title><linkrel="stylesheet"type="text/css"href="../../normalize.css"><linkrel="stylesheet"type="text/css"href="../../rustdoc.css"id="mainThemeStyle"><linkrel="stylesheet"type="text/css"href="../../dark.css"><linkrel="stylesheet"type="text/css"href="../../light.css"id="themeStyle"><scriptsrc="../../storage.js"></script></head><bodyclass="rustdoc trait"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><navclass="sidebar"><divclass="sidebar-menu">☰</div><pclass='location'>Trait Middleware</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#provided-methods">Provided Methods</a><divclass="sidebar-links"><ahref="#method.start">start</a><ahref="#method.response">response</a><ahref="#method.finish">finish</a></div><aclass="sidebar-title"href="#implementors">Implementors</a></div><pclass='location'><ahref='../index.html'>actix_web</a>::<wbr><ahref='index.html'>middleware</a></p><script>window.sidebarCurrent={name:'Middleware',ty:'trait',relpath:''};</script><scriptdefersrc="sidebar-items.js"></script></div></nav><divclass="theme-picker"><buttonid="theme-picker"aria-label="Pick another theme!"><imgsrc="../../brush.svg"width="18"alt="Pick another theme!"></button><divid="theme-choices"></div></div><scriptsrc="../../theme.js"></script><navclass="sub"><formclass="search-form js-only"><divclass="search-container"><inputclass="search-input"name="search"autocomplete="off"placeholder="Click or press ‘S’ to search, ‘?’ for more options…"type="search"><aid="settings-menu"href="../../settings.html"><imgsrc="../../wheel.svg"width="18"alt="Change settings"></a></div></form></nav><sectionid="main"class="content"><h1class='fqn'><spanclass='out-of-band'><spanid='render-detail'><aid="toggle-all-docs"href="javascript:void(0)"title="collapse all docs">[<spanclass='inner'>−</span>]</a></span><aclass='srclink'href='../../src/actix_web/middleware/mod.rs.html#51-68'title='goto source code'>[src]</a></span><spanclass='in-band'>Trait <ahref='../index.html'>actix_web</a>::<wbr><ahref='index.html'>middleware</a>::<wbr><aclass="trait"href=''>Middleware</a></span></h1><divclass="docblock type-decl hidden-by-usual-hider"><preclass='rust trait'>pub trait Middleware<S>: 'static {
<h3id='method.start'class='method'><spanid='start.v'class='invisible'><code>fn <ahref='#method.start'class='fnname'>start</a>(&self, req: &<aclass="struct"href="../../actix_web/struct.HttpRequest.html"title="struct actix_web::HttpRequest">HttpRequest</a><S>) -><aclass="type"href="../../actix_web/error/type.Result.html"title="type actix_web::error::Result">Result</a><<aclass="enum"href="../../actix_web/middleware/enum.Started.html"title="enum actix_web::middleware::Started">Started</a>></code></span></h3><divclass='docblock'><p>Method is called when request is ready. It may return
future, which should resolve before next middleware get called.</p>
</div><h3id='method.response'class='method'><spanid='response.v'class='invisible'><code>fn <ahref='#method.response'class='fnname'>response</a>(&self, req: &<aclass="struct"href="../../actix_web/struct.HttpRequest.html"title="struct actix_web::HttpRequest">HttpRequest</a><S>, resp: <aclass="struct"href="../../actix_web/struct.HttpResponse.html"title="struct actix_web::HttpResponse">HttpResponse</a>) -><aclass="type"href="../../actix_web/error/type.Result.html"title="type actix_web::error::Result">Result</a><<aclass="enum"href="../../actix_web/middleware/enum.Response.html"title="enum actix_web::middleware::Response">Response</a>></code></span></h3><divclass='docblock'><p>Method is called when handler returns response,
but before sending http message to peer.</p>
</div><h3id='method.finish'class='method'><spanid='finish.v'class='invisible'><code>fn <ahref='#method.finish'class='fnname'>finish</a>(&self, req: &<aclass="struct"href="../../actix_web/struct.HttpRequest.html"title="struct actix_web::HttpRequest">HttpRequest</a><S>, resp: &<aclass="struct"href="../../actix_web/struct.HttpResponse.html"title="struct actix_web::HttpResponse">HttpResponse</a>) -><aclass="enum"href="../../actix_web/middleware/enum.Finished.html"title="enum actix_web::middleware::Finished">Finished</a></code></span></h3><divclass='docblock'><p>Method is called after body stream get sent to peer.</p>
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