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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="API documentation for the Rust `PROXY_AUTHENTICATE` constant in crate `hyper`."><meta name="keywords" content="rust, rustlang, rust-lang, PROXY_AUTHENTICATE"><title>hyper::header::PROXY_AUTHENTICATE - 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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><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='../../hyper/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><div class="sidebar-elems"><p class="location"><a href="../index.html">hyper</a>::<wbr><a href="index.html">header</a></p><script>window.sidebarCurrent = {name: "PROXY_AUTHENTICATE", 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!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></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><button type="button" class="help-button">?</button>
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<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#146-965" title="goto source code">[src]</a></span><span class="in-band">Constant <a href="../index.html">hyper</a>::<wbr><a href="index.html">header</a>::<wbr><a class="constant" href="">PROXY_AUTHENTICATE</a></span></h1><pre class="rust const">pub const PROXY_AUTHENTICATE: <a class="struct" href="../../hyper/header/struct.HeaderName.html" title="struct hyper::header::HeaderName">HeaderName</a>;</pre><div class="docblock"><p>Defines the authentication method that should be used to gain access to
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a proxy.</p>
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<p>Unlike <code>www-authenticate</code>, the <code>proxy-authenticate</code> header field applies
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only to the next outbound client on the response chain. This is because
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only the client that chose a given proxy is likely to have the
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credentials necessary for authentication. However, when multiple proxies
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are used within the same administrative domain, such as office and
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regional caching proxies within a large corporate network, it is common
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for credentials to be generated by the user agent and passed through the
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hierarchy until consumed. Hence, in such a configuration, it will appear
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as if Proxy-Authenticate is being forwarded because each proxy will send
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the same challenge set.</p>
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<p>The <code>proxy-authenticate</code> header is sent along with a <code>407 Proxy Authentication Required</code>.</p>
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