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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="Parses extended header parameter values (`ext-value`), as defined in RFC 5987 §3.2."><title>parse_extended_value in awc::http::header - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="awc" data-themes="" data-resource-suffix="" data-rustdoc-version="1.80.0-nightly (bdbbb6c6a 2024-05-26)" data-channel="nightly" data-search-js="search-d52510db62a78183.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-df360f571f6edeae.css"></noscript><link rel="icon" href="https://actix.rs/favicon.ico"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button><a class="logo-container" href="../../../awc/index.html"><img src="https://actix.rs/img/logo.png" alt=""></a></nav><nav class="sidebar"><div class="sidebar-crate"><a class="logo-container" href="../../../awc/index.html"><img src="https://actix.rs/img/logo.png" alt="logo"></a><h2><a href="../../../awc/index.html">awc</a><span class="version">3.5.0</span></h2></div><div class="sidebar-elems"><h2><a href="index.html">In awc::http::header</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Function <a href="../../index.html">awc</a>::<wbr><a href="../index.html">http</a>::<wbr><a href="index.html">header</a>::<wbr><a class="fn" href="#">parse_extended_value</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub fn parse_extended_value(val: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</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="struct.ExtendedValue.html" title="struct awc::http::header::ExtendedValue">ExtendedValue</a>, ParseError></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Parses extended header parameter values (<code>ext-value</code>), as defined
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in <a href="https://datatracker.ietf.org/doc/html/rfc5987#section-3.2">RFC 5987 §3.2</a>.</p>
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<p>Extended values are denoted by parameter names that end with <code>*</code>.</p>
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<h3 id="abnf"><a class="doc-anchor" href="#abnf">§</a>ABNF</h3><div class="example-wrap"><pre class="language-plain"><code>ext-value = charset "'" [ language ] "'" value-chars
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; like RFC 2231's <extended-initial-value>
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; (see [RFC 2231 §7])
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charset = "UTF-8" / "ISO-8859-1" / mime-charset
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mime-charset = 1*mime-charsetc
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mime-charsetc = ALPHA / DIGIT
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/ "!" / "#" / "$" / "%" / "&"
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/ "+" / "-" / "^" / "_" / "`"
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/ "{" / "}" / "~"
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; as <mime-charset> in [RFC 2978 §2.3]
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; except that the single quote is not included
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; SHOULD be registered in the IANA charset registry
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language = <Language-Tag, defined in [RFC 5646 §2.1]>
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value-chars = *( pct-encoded / attr-char )
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pct-encoded = "%" HEXDIG HEXDIG
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; see [RFC 3986 §2.1]
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attr-char = ALPHA / DIGIT
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/ "!" / "#" / "$" / "&" / "+" / "-" / "."
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/ "^" / "_" / "`" / "|" / "~"
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; token except ( "*" / "'" / "%" )
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</code></pre></div></div></details></section></div></main></body></html>
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