<!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 `AsHeaderName` trait in crate `actix_web`."><metaname="keywords"content="rust, rustlang, rust-lang, AsHeaderName"><title>actix_web::http::header::AsHeaderName - 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 AsHeaderName</p><divclass="sidebar-elems"><divclass="block items"><aclass="sidebar-title"href="#foreign-impls">Implementations on Foreign Types</a><divclass="sidebar-links"><ahref="#impl-AsHeaderName">&'a String</a><ahref="#impl-AsHeaderName">&'a str</a><ahref="#impl-AsHeaderName">String</a></div><aclass="sidebar-title"href="#implementors">Implementors</a></div><pclass='location'><ahref='../../index.html'>actix_web</a>::<wbr><ahref='../index.html'>http</a>::<wbr><ahref='index.html'>header</a></p><script>window.sidebarCurrent={name:'AsHeaderName',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='https://docs.rs/http/0.1.13/src/http/header/map.rs.html#3154'title='goto source code'>[src]</a></span><spanclass='in-band'>Trait <ahref='../../index.html'>actix_web</a>::<wbr><ahref='../index.html'>http</a>::<wbr><ahref='index.html'>header</a>::<wbr><aclass="trait"href=''>AsHeaderName</a></span></h1><divclass="docblock type-decl hidden-by-usual-hider"><preclass='rust trait'>pub trait AsHeaderName: Sealed { }</pre></div><divclass='docblock'><p>A marker trait used to identify values that can be used as search keys
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