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6.2 KiB
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178 lines
No EOL
6.2 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="generator" content="rustdoc">
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<meta name="description" content="API documentation for the Rust `EntityTag` struct in crate `hyper`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, EntityTag">
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<title>hyper::header::EntityTag - Rust</title>
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<link rel="stylesheet" type="text/css" href="../../rustdoc.css">
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<link rel="stylesheet" type="text/css" href="../../main.css">
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</head>
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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: 'EntityTag', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script>
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</nav>
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<nav class="sub">
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<form class="search-form js-only">
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<div class="search-container">
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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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</div>
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</form>
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</nav>
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<section id='main' class="content struct">
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<h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>hyper</a>::<wbr><a href='index.html'>header</a>::<wbr><a class='struct' href=''>EntityTag</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-4982' class='srclink' href='../../src/hyper/header/shared/entity.rs.html#43-48' title='goto source code'>[src]</a></span></h1>
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<pre class='rust struct'>pub struct EntityTag {
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pub weak: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a>,
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// some fields omitted
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}</pre><div class='docblock'><p>An entity tag, defined in <a href="https://tools.ietf.org/html/rfc7232#section-2.3">RFC7232</a></p>
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<p>An entity tag consists of a string enclosed by two literal double quotes.
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Preceding the first double quote is an optional weakness indicator,
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which always looks like <code>W/</code>. Examples for valid tags are <code>"xyzzy"</code> and <code>W/"xyzzy"</code>.</p>
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<h1 id='abnf' class='section-header'><a href='#abnf'>ABNF</a></h1>
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<pre><code class="language-plain">entity-tag = [ weak ] opaque-tag
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weak = %x57.2F ; "W/", case-sensitive
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opaque-tag = DQUOTE *etagc DQUOTE
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etagc = %x21 / %x23-7E / obs-text
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; VCHAR except double quotes, plus obs-text
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</code></pre>
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<h1 id='comparison' class='section-header'><a href='#comparison'>Comparison</a></h1>
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<p>To check if two entity tags are equivalent in an application always use the <code>strong_eq</code> or
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<code>weak_eq</code> methods based on the context of the Tag. Only use <code>==</code> to check if two tags are
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identical.</p>
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<p>The example below shows the results for a set of entity-tag pairs and
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both the weak and strong comparison function results:</p>
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<table>
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<thead>
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<tr>
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<th>ETag 1</th>
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<th>ETag 2</th>
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<th>Strong Comparison</th>
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<th>Weak Comparison</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>W/"1"</code></td>
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<td><code>W/"1"</code></td>
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<td>no match</td>
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<td>match</td>
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</tr>
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<tr>
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<td><code>W/"1"</code></td>
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<td><code>W/"2"</code></td>
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<td>no match</td>
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<td>no match</td>
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</tr>
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<tr>
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<td><code>W/"1"</code></td>
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<td><code>"1"</code></td>
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<td>no match</td>
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<td>match</td>
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</tr>
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<tr>
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<td><code>"1"</code></td>
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<td><code>"1"</code></td>
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<td>match</td>
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<td>match</td>
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</tr>
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</tbody>
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</table>
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</div><h2 class='fields'>Fields</h2><span id='structfield.weak' class='structfield'><code>weak: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a></code>
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</span><span class='stab '></span><div class='docblock'><p>Weakness indicator for the tag</p>
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</div></section>
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<section id='search' class="content hidden"></section>
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<section class="footer"></section>
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<aside id="help" class="hidden">
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<div>
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<h1 class="hidden">Help</h1>
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<div class="shortcuts">
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<h2>Keyboard Shortcuts</h2>
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<dl>
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<dt>?</dt>
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<dd>Show this help dialog</dd>
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<dt>S</dt>
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<dd>Focus the search field</dd>
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<dt>⇤</dt>
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<dd>Move up in search results</dd>
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<dt>⇥</dt>
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<dd>Move down in search results</dd>
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<dt>⏎</dt>
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<dd>Go to active search result</dd>
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<dd>Collapse/expand all sections</dd>
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</dl>
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</div>
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<div class="infos">
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<h2>Search Tricks</h2>
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<p>
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Prefix searches with a type followed by a colon (e.g.
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<code>fn:</code>) to restrict the search to a given type.
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</p>
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<p>
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Accepted types are: <code>fn</code>, <code>mod</code>,
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<code>struct</code>, <code>enum</code>,
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<code>trait</code>, <code>type</code>, <code>macro</code>,
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and <code>const</code>.
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</p>
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<p>
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Search functions by type signature (e.g.
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<code>vec -> usize</code> or <code>* -> vec</code>)
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</p>
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</div>
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</div>
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</aside>
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<script>
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window.rootPath = "../../";
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window.currentCrate = "hyper";
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window.playgroundUrl = "";
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</script>
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<script src="../../jquery.js"></script>
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