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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="Advertises which content encoding the client is able to understand."><title>ACCEPT_ENCODING 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 constant"><!--[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>Constant <a href="../../index.html">awc</a>::<wbr><a href="../index.html">http</a>::<wbr><a href="index.html">header</a>::<wbr><a class="constant" href="#">ACCEPT_ENCODING</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><a class="src" href="https://docs.rs/http/0.2.11/src/http/header/name.rs.html#156-987">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub const ACCEPT_ENCODING: <a class="struct" href="struct.HeaderName.html" title="struct awc::http::header::HeaderName">HeaderName</a>;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Advertises which content encoding the client is able to understand.</p>
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<p>The Accept-Encoding request HTTP header advertises which content
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encoding, usually a compression algorithm, the client is able to
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understand. Using content negotiation, the server selects one of the
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proposals, uses it and informs the client of its choice with the
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Content-Encoding response header.</p>
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<p>Even if both the client and the server supports the same compression
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algorithms, the server may choose not to compress the body of a
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response, if the identity value is also acceptable. Two common cases
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lead to this:</p>
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<ul>
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<li>
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<p>The data to be sent is already compressed and a second compression
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won’t lead to smaller data to be transmitted. This may the case with
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some image formats;</p>
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</li>
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<li>
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<p>The server is overloaded and cannot afford the computational overhead
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induced by the compression requirement. Typically, Microsoft recommends
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not to compress if a server use more than 80 % of its computational
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power.</p>
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</li>
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</ul>
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<p>As long as the identity value, meaning no encryption, is not explicitly
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forbidden, by an identity;q=0 or a *;q=0 without another explicitly set
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value for identity, the server must never send back a 406 Not Acceptable
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error.</p>
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</div></details></section></div></main></body></html> |