<!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 `IfUnmodifiedSince` struct in crate `hyper`."> <meta name="keywords" content="rust, rustlang, rust-lang, IfUnmodifiedSince"> <title>hyper::header::IfUnmodifiedSince - Rust</title> <link rel="stylesheet" type="text/css" href="../../rustdoc.css"> <link rel="stylesheet" type="text/css" href="../../main.css"> </head> <body class="rustdoc"> <!--[if lte IE 8]> <div class="warning"> This old browser is unsupported and will most likely display funky things. </div> <![endif]--> <nav class="sidebar"> <p class='location'><a href='../index.html'>hyper</a>::<wbr><a href='index.html'>header</a></p><script>window.sidebarCurrent = {name: 'IfUnmodifiedSince', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script> </nav> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content struct"> <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=''>IfUnmodifiedSince</a></span><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 id='src-3413' class='srclink' href='../../src/hyper/header/common/mod.rs.html#273' title='goto source code'>[src]</a></span></h1> <pre class='rust struct'>pub struct IfUnmodifiedSince(pub <a class='struct' href='../../hyper/header/struct.HttpDate.html' title='hyper::header::HttpDate'>HttpDate</a>);</pre><div class='docblock'><p><code>If-Unmodified-Since</code> header, defined in <a href="http://tools.ietf.org/html/rfc7232#section-3.4">RFC7232</a></p> <p>The <code>If-Unmodified-Since</code> header field makes the request method conditional on the selected representation's last modification date being earlier than or equal to the date provided in the field-value. This field accomplishes the same purpose as If-Match for cases where the user agent does not have an entity-tag for the representation.</p> <h1 id='abnf' class='section-header'><a href='#abnf'>ABNF</a></h1> <pre><code class="language-plain">If-Unmodified-Since = HTTP-date </code></pre> <h1 id='example-values' class='section-header'><a href='#example-values'>Example values</a></h1> <ul> <li><code>Sat, 29 Oct 1994 19:43:31 GMT</code></li> </ul> <h1 id='example' class='section-header'><a href='#example'>Example</a></h1> <pre class='rust rust-example-rendered'> <span class='comment'>// extern crate time;</span> <span class='kw'>use</span> <span class='ident'>hyper</span>::<span class='ident'>header</span>::{<span class='ident'>Headers</span>, <span class='ident'>IfUnmodifiedSince</span>, <span class='ident'>HttpDate</span>}; <span class='kw'>use</span> <span class='ident'>time</span>::{<span class='self'>self</span>, <span class='ident'>Duration</span>}; <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>(); <span class='ident'>headers</span>.<span class='ident'>set</span>(<span class='ident'>IfUnmodifiedSince</span>(<span class='ident'>HttpDate</span>(<span class='ident'>time</span>::<span class='ident'>now</span>() <span class='op'>-</span> <span class='ident'>Duration</span>::<span class='ident'>days</span>(<span class='number'>1</span>))));</pre> </div></section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt>?</dt> <dd>Show this help dialog</dd> <dt>S</dt> <dd>Focus the search field</dd> <dt>⇤</dt> <dd>Move up in search results</dd> <dt>⇥</dt> <dd>Move down in search results</dd> <dt>⏎</dt> <dd>Go to active search result</dd> <dt>+</dt> <dd>Collapse/expand all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../"; window.currentCrate = "hyper"; window.playgroundUrl = ""; </script> <script src="../../jquery.js"></script> <script src="../../main.js"></script> <script defer src="../../search-index.js"></script> </body> </html>