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<p class='location'>Enum IfRange</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#variants">Variants</a><div class="sidebar-links"><a href="#variant.EntityTag">EntityTag</a><a href="#variant.Date">Date</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Debug">Debug</a><a href="#impl-PartialEq">PartialEq</a><a href="#impl-Header">Header</a><a href="#impl-Display">Display</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='../index.html'>hyper</a>::<wbr><a href='index.html'>header</a></p><script>window.sidebarCurrent = {name: 'IfRange', ty: 'enum', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content"><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=''>IfRange</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>&#x2212;</span>]
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</span><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#48-53' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust enum'>pub enum IfRange {
EntityTag(<a class="struct" href="../../hyper/header/struct.EntityTag.html" title="struct hyper::header::EntityTag">EntityTag</a>),
Date(<a class="struct" href="../../hyper/header/struct.HttpDate.html" title="struct hyper::header::HttpDate">HttpDate</a>),
}</pre></div><div class='docblock'><p><code>If-Range</code> header, defined in <a href="http://tools.ietf.org/html/rfc7233#section-3.2">RFC7233</a></p>
<p>If a client has a partial copy of a representation and wishes to have
an up-to-date copy of the entire representation, it could use the
Range header field with a conditional GET (using either or both of
If-Unmodified-Since and If-Match.) However, if the precondition
fails because the representation has been modified, the client would
then have to make a second request to obtain the entire current
representation.</p>
<p>The <code>If-Range</code> header field allows a client to &quot;short-circuit&quot; the
second request. Informally, its meaning is as follows: if the
representation is unchanged, send me the part(s) that I am requesting
in Range; otherwise, send me the entire representation.</p>
<h1 id="abnf" class="section-header"><a href="#abnf">ABNF</a></h1>
<pre><code class="language-text">If-Range = entity-tag / 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>
<li><code>\&quot;xyzzy\&quot;</code></li>
</ul>
<h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">hyper</span>::<span class="ident">header</span>::{<span class="ident">Headers</span>, <span class="ident">IfRange</span>, <span class="ident">EntityTag</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">IfRange</span>::<span class="ident">EntityTag</span>(<span class="ident">EntityTag</span>::<span class="ident">new</span>(<span class="bool-val">false</span>, <span class="string">&quot;xyzzy&quot;</span>.<span class="ident">to_owned</span>())));</pre>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">hyper</span>::<span class="ident">header</span>::{<span class="ident">Headers</span>, <span class="ident">IfRange</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">SystemTime</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="kw">let</span> <span class="ident">fetched</span> <span class="op">=</span> <span class="ident">SystemTime</span>::<span class="ident">now</span>() <span class="op">-</span> <span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">60</span> <span class="op">*</span> <span class="number">60</span> <span class="op">*</span> <span class="number">24</span>);
<span class="ident">headers</span>.<span class="ident">set</span>(<span class="ident">IfRange</span>::<span class="ident">Date</span>(<span class="ident">fetched</span>.<span class="ident">into</span>()));</pre>
</div><h2 id='variants' class='variants small-section-header'>
Variants<a href='#variants' class='anchor'></a></h2>
<span id="variant.EntityTag" class="variant small-section-header"><a href="#variant.EntityTag" class="anchor field"></a><span id='EntityTag.v' class='invisible'><code>EntityTag(<a class="struct" href="../../hyper/header/struct.EntityTag.html" title="struct hyper::header::EntityTag">EntityTag</a>)</code></span></span><div class='docblock'><p>The entity-tag the client has of the resource</p>
</div><span id="variant.Date" class="variant small-section-header"><a href="#variant.Date" class="anchor field"></a><span id='Date.v' class='invisible'><code>Date(<a class="struct" href="../../hyper/header/struct.HttpDate.html" title="struct hyper::header::HttpDate">HttpDate</a>)</code></span></span><div class='docblock'><p>The date when the client retrieved the resource</p>
</div>
<h2 id='implementations' class='small-section-header'>
Trait Implementations<a href='#implementations' class='anchor'></a>
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<div id='implementations-list'>
<h3 id='impl-Clone' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-Clone' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.clone' class="method"><span id='clone.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone' class='fnname'>clone</a>(&amp;self) -&gt; <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id='method.clone_from' class="method"><span id='clone_from.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from' class='fnname'>clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self)</code></span></td><td><span class='out-of-band'><div class='ghost'></div><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div><a class='srclink' href='https://doc.rust-lang.org/nightly/src/core/clone.rs.html#117-119' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, __arg_0: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div><h3 id='impl-PartialEq' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-PartialEq' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.eq' class="method"><span id='eq.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq' class='fnname'>eq</a>(&amp;self, __arg_0: &amp;<a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests for <code>self</code> and <code>other</code> values to be equal, and is used by <code>==</code>. <a href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#tymethod.eq">Read more</a></p>
</div><h4 id='method.ne' class="method"><span id='ne.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html#method.ne' class='fnname'>ne</a>(&amp;self, __arg_0: &amp;<a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#47' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>This method tests for <code>!=</code>.</p>
</div></div><h3 id='impl-Header' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="../../hyper/header/trait.Header.html" title="trait hyper::header::Header">Header</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-Header' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#55-75' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.header_name' class="method"><span id='header_name.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../hyper/header/trait.Header.html#tymethod.header_name' class='fnname'>header_name</a>() -&gt; &amp;'static <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#56-59' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Returns the name of the header field this belongs to. <a href="../../hyper/header/trait.Header.html#tymethod.header_name">Read more</a></p>
</div><h4 id='method.parse_header' class="method"><span id='parse_header.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../hyper/header/trait.Header.html#tymethod.parse_header' class='fnname'>parse_header</a>(raw: &amp;<a class="struct" href="../../hyper/header/struct.Raw.html" title="struct hyper::header::Raw">Raw</a>) -&gt; <a class="type" href="../../hyper/error/type.Result.html" title="type hyper::error::Result">Result</a>&lt;<a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a>&gt;</code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#60-70' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Parse a header from a raw stream of bytes. <a href="../../hyper/header/trait.Header.html#tymethod.parse_header">Read more</a></p>
</div><h4 id='method.fmt_header' class="method"><span id='fmt_header.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='../../hyper/header/trait.Header.html#tymethod.fmt_header' class='fnname'>fmt_header</a>(&amp;self, f: &amp;mut <a class="struct" href="../../hyper/header/struct.Formatter.html" title="struct hyper::header::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#72-74' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Format a header to outgoing stream. <a href="../../hyper/header/trait.Header.html#tymethod.fmt_header">Read more</a></p>
</div></div><h3 id='impl-Display' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-Display' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#77-84' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt-1' class="method"><span id='fmt.v-1' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt' class='fnname'>fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/hyper/header/common/if_range.rs.html#78-83' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></p>
</div></div></div>
<h2 id='synthetic-implementations' class='small-section-header'>
Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a>
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<div id='synthetic-implementations-list'>
<h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="enum" href="../../hyper/header/enum.IfRange.html" title="enum hyper::header::IfRange">IfRange</a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section>
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