147 lines
6.6 KiB
HTML
147 lines
6.6 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<meta charset="utf-8">
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<meta name="generator" content="rustdoc">
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<meta name="description" content="API documentation for the Rust `Pragma` enum in crate `hyper`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, Pragma">
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<title>hyper::header::Pragma - Rust</title>
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<link rel="stylesheet" type="text/css" href="../../rustdoc.css">
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<body class="rustdoc">
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<!--[if lte IE 8]>
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<div class="warning">
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This old browser is unsupported and will most likely display funky
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things.
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</div>
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<![endif]-->
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<nav class="sidebar">
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<p class='location'><a href='../index.html'>hyper</a>::<wbr><a href='index.html'>header</a></p><script>window.sidebarCurrent = {name: 'Pragma', ty: 'enum', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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<input class="search-input" name="search"
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autocomplete="off"
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placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
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type="search">
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</form>
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</nav>
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<section id='main' class="content enum">
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<h1 class='fqn'><span class='in-band'>Enum <a href='../index.html'>hyper</a>::<wbr><a href='index.html'>header</a>::<wbr><a class='enum' href=''>Pragma</a></span><span class='out-of-band'><span id='render-detail'>
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<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
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[<span class='inner'>−</span>]
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</a>
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</span><a id='src-3609' class='srclink' href='../../src/hyper/header/common/pragma.rs.html#34-39' title='goto source code'>[src]</a></span></h1>
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<pre class='rust enum'>pub enum Pragma {
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NoCache,
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Ext(<a class='struct' href='https://doc.rust-lang.org/nightly/collections/string/struct.String.html' title='collections::string::String'>String</a>),
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}</pre><div class='docblock'><p>The <code>Pragma</code> header defined by HTTP/1.0.</p>
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<blockquote>
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<p>The "Pragma" header field allows backwards compatibility with
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HTTP/1.0 caches, so that clients can specify a "no-cache" request
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that they will understand (as Cache-Control was not defined until
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HTTP/1.1). When the Cache-Control header field is also present and
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understood in a request, Pragma is ignored.
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In HTTP/1.0, Pragma was defined as an extensible field for
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implementation-specified directives for recipients. This
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specification deprecates such extensions to improve interoperability.</p>
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</blockquote>
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<p>Spec: <a href="https://tools.ietf.org/html/rfc7234#section-5.4">https://tools.ietf.org/html/rfc7234#section-5.4</a></p>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>hyper</span>::<span class='ident'>header</span>::{<span class='ident'>Headers</span>, <span class='ident'>Pragma</span>};
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='ident'>Headers</span>::<span class='ident'>new</span>();
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<span class='ident'>headers</span>.<span class='ident'>set</span>(<span class='ident'>Pragma</span>::<span class='ident'>NoCache</span>);</pre>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>hyper</span>::<span class='ident'>header</span>::{<span class='ident'>Headers</span>, <span class='ident'>Pragma</span>};
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='ident'>Headers</span>::<span class='ident'>new</span>();
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<span class='ident'>headers</span>.<span class='ident'>set</span>(<span class='ident'>Pragma</span>::<span class='ident'>Ext</span>(<span class='string'>"foobar"</span>.<span class='ident'>to_owned</span>()));</pre>
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</div><h2 class='variants'>Variants</h2>
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<span id='variant.NoCache' class='variant'><code>NoCache</code></span><div class='docblock'><p>Corresponds to the <code>no-cache</code> value.</p>
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</div><span id='variant.Ext' class='variant'><code>Ext(<a class='struct' href='https://doc.rust-lang.org/nightly/collections/string/struct.String.html' title='collections::string::String'>String</a>)</code></span><div class='docblock'><p>Every value other than <code>no-cache</code>.</p>
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</div></section>
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<section id='search' class="content hidden"></section>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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