21 lines
4.5 KiB
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21 lines
4.5 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 `ACCEPT_LANGUAGE` constant in crate `http`."><meta name="keywords" content="rust, rustlang, rust-lang, ACCEPT_LANGUAGE"><title>http::header::ACCEPT_LANGUAGE - 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 constant"><!--[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='../../http/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class='location'><a href='../index.html'>http</a>::<wbr><a href='index.html'>header</a></p><script>window.sidebarCurrent = {name: 'ACCEPT_LANGUAGE', ty: 'constant', 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/http/header/name.rs.html#83-85' title='goto source code'>[src]</a></span><span class='in-band'>Constant <a href='../index.html'>http</a>::<wbr><a href='index.html'>header</a>::<wbr><a class="constant" href=''>ACCEPT_LANGUAGE</a></span></h1><pre class='rust const'>pub const ACCEPT_LANGUAGE: <a class="struct" href="../../http/header/struct.HeaderName.html" title="struct http::header::HeaderName">HeaderName</a>;</pre><div class='docblock'><p>Advertises which languages the client is able to understand.</p>
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<p>The Accept-Language request HTTP header advertises which languages the
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client is able to understand, and which locale variant is preferred.
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Using content negotiation, the server then selects one of the proposals,
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uses it and informs the client of its choice with the Content-Language
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response header. Browsers set adequate values for this header according
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their user interface language and even if a user can change it, this
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happens rarely (and is frown upon as it leads to fingerprinting).</p>
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<p>This header is a hint to be used when the server has no way of
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determining the language via another way, like a specific URL, that is
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controlled by an explicit user decision. It is recommended that the
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server never overrides an explicit decision. The content of the
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Accept-Language is often out of the control of the user (like when
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traveling and using an Internet Cafe in a different country); the user
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may also want to visit a page in another language than the locale of
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their user interface.</p>
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<p>If the server cannot serve any matching language, it can theoretically
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send back a 406 (Not Acceptable) error code. But, for a better user
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experience, this is rarely done and more common way is to ignore the
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Accept-Language header in this case.</p>
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