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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="Parse a buffer of bytes as headers."><title>parse_headers in httparse - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="httparse" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></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">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../httparse/index.html">httparse</a><span class="version">1.8.0</span></h2></div><div class="sidebar-elems"></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../httparse/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Function <a href="index.html">httparse</a>::<wbr><a class="fn" href="#">parse_headers</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/httparse/lib.rs.html#893-900">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub fn parse_headers<'b: 'h, 'h>(
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src: &'b [<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>],
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dst: &'h mut [<a class="struct" href="struct.Header.html" title="struct httparse::Header">Header</a><'b>]
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) -> <a class="type" href="type.Result.html" title="type httparse::Result">Result</a><(<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.usize.html">usize</a>, &'h [<a class="struct" href="struct.Header.html" title="struct httparse::Header">Header</a><'b>])></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Parse a buffer of bytes as headers.</p>
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<p>The return value, if complete and successful, includes the index of the
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buffer that parsing stopped at, and a sliced reference to the parsed
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headers. The length of the slice will be equal to the number of properly
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parsed headers.</p>
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<h2 id="example"><a href="#example">Example</a></h2>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>buf = <span class="string">b"Host: foo.bar\nAccept: */*\n\nblah blah"</span>;
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<span class="kw">let </span><span class="kw-2">mut </span>headers = [httparse::EMPTY_HEADER; <span class="number">4</span>];
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<span class="macro">assert_eq!</span>(httparse::parse_headers(buf, <span class="kw-2">&mut </span>headers),
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<span class="prelude-val">Ok</span>(httparse::Status::Complete((<span class="number">27</span>, <span class="kw-2">&</span>[
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httparse::Header { name: <span class="string">"Host"</span>, value: <span class="string">b"foo.bar" </span>},
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httparse::Header { name: <span class="string">"Accept"</span>, value: <span class="string">b"*/*" </span>}
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][..]))));</code></pre></div>
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