juniper/iron/headers/enum.Pragma.html

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2016-09-11 13:41:24 -05:00
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<h1 class='fqn'><span class='in-band'>Enum <a href='../index.html'>iron</a>::<wbr><a href='index.html'>headers</a>::<wbr><a class='enum' href=''>Pragma</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 id='src-3609' class='srclink' href='../../hyper/header/common/pragma/enum.Pragma.html?gotosrc=3609' title='goto source code'>[src]</a></span></h1>
<pre class='rust enum'>pub enum Pragma {
NoCache,
Ext(<a class='struct' href='https://doc.rust-lang.org/nightly/collections/string/struct.String.html' title='collections::string::String'>String</a>),
}</pre><div class='docblock'><p>The <code>Pragma</code> header defined by HTTP/1.0.</p>
<blockquote>
<p>The &quot;Pragma&quot; header field allows backwards compatibility with
HTTP/1.0 caches, so that clients can specify a &quot;no-cache&quot; request
that they will understand (as Cache-Control was not defined until
HTTP/1.1). When the Cache-Control header field is also present and
understood in a request, Pragma is ignored.
In HTTP/1.0, Pragma was defined as an extensible field for
implementation-specified directives for recipients. This
specification deprecates such extensions to improve interoperability.</p>
</blockquote>
<p>Spec: <a href="https://tools.ietf.org/html/rfc7234#section-5.4">https://tools.ietf.org/html/rfc7234#section-5.4</a></p>
<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'>Pragma</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'>Pragma</span>::<span class='ident'>NoCache</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'>Pragma</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'>Pragma</span>::<span class='ident'>Ext</span>(<span class='string'>&quot;foobar&quot;</span>.<span class='ident'>to_owned</span>()));</pre>
</div><h2 class='variants'>Variants</h2>
<span id='variant.NoCache' class='variant'><code>NoCache</code></span><div class='docblock'><p>Corresponds to the <code>no-cache</code> value.</p>
</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>
</div><h2 id='implementations'>Trait Implementations</h2><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html' title='core::fmt::Debug'>Debug</a> for <a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a></code></span><span class='out-of-band'></span></h3>
<div class='impl-items'><h4 id='method.fmt' class='method'><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='core::fmt::Formatter'>Formatter</a>) -&gt; <a class='enum' href='https://doc.rust-lang.org/nightly/core/result/enum.Result.html' title='core::result::Result'>Result</a>&lt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.tuple.html'>()</a>,&nbsp;<a class='struct' href='https://doc.rust-lang.org/nightly/core/fmt/struct.Error.html' title='core::fmt::Error'>Error</a>&gt;</code></h4>
<div class='docblock'><p>Formats the value using the given formatter.</p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html' title='core::cmp::PartialEq'>PartialEq</a>&lt;<a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a>&gt; for <a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a></code></span><span class='out-of-band'></span></h3>
<div class='impl-items'><h4 id='method.eq' class='method'><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='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a>) -&gt; <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a></code></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'><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='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a>) -&gt; <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.bool.html'>bool</a></code></h4>
<div class='docblock'><p>This method tests for <code>!=</code>.</p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html' title='core::clone::Clone'>Clone</a> for <a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a></code></span><span class='out-of-band'></span></h3>
<div class='impl-items'><h4 id='method.clone' class='method'><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='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a></code></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'><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: &amp;Self)</code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></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 class='impl'><span class='in-band'><code>impl <a class='trait' href='../../iron/headers/trait.Header.html' title='iron::headers::Header'>Header</a> for <a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a></code></span><span class='out-of-band'></span></h3>
<div class='impl-items'><h4 id='method.header_name' class='method'><code>fn <a href='../../iron/headers/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></h4>
<div class='docblock'><p>Returns the name of the header field this belongs to. <a href="../../iron/headers/trait.Header.html#tymethod.header_name">Read more</a></p>
</div><h4 id='method.parse_header' class='method'><code>fn <a href='../../iron/headers/trait.Header.html#tymethod.parse_header' class='fnname'>parse_header</a>(raw: <a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.slice.html'>&amp;[</a><a class='struct' href='https://doc.rust-lang.org/nightly/collections/vec/struct.Vec.html' title='collections::vec::Vec'>Vec</a>&lt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.u8.html'>u8</a>&gt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.slice.html'>]</a>) -&gt; <a class='enum' href='https://doc.rust-lang.org/nightly/core/result/enum.Result.html' title='core::result::Result'>Result</a>&lt;<a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a>,&nbsp;<a class='enum' href='../../iron/error/enum.HttpError.html' title='iron::error::HttpError'>Error</a>&gt;</code></h4>
<div class='docblock'><p>Parse a header from a raw stream of bytes. <a href="../../iron/headers/trait.Header.html#tymethod.parse_header">Read more</a></p>
</div></div><h3 class='impl'><span class='in-band'><code>impl <a class='trait' href='../../iron/headers/trait.HeaderFormat.html' title='iron::headers::HeaderFormat'>HeaderFormat</a> for <a class='enum' href='../../iron/headers/enum.Pragma.html' title='iron::headers::Pragma'>Pragma</a></code></span><span class='out-of-band'></span></h3>
<div class='impl-items'><h4 id='method.fmt_header' class='method'><code>fn <a href='../../iron/headers/trait.HeaderFormat.html#tymethod.fmt_header' class='fnname'>fmt_header</a>(&amp;self, f: &amp;mut <a class='struct' href='https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html' title='core::fmt::Formatter'>Formatter</a>) -&gt; <a class='enum' href='https://doc.rust-lang.org/nightly/core/result/enum.Result.html' title='core::result::Result'>Result</a>&lt;<a class='primitive' href='https://doc.rust-lang.org/nightly/std/primitive.tuple.html'>()</a>,&nbsp;<a class='struct' href='https://doc.rust-lang.org/nightly/core/fmt/struct.Error.html' title='core::fmt::Error'>Error</a>&gt;</code></h4>
<div class='docblock'><p>Format a header to be output into a TcpStream. <a href="../../iron/headers/trait.HeaderFormat.html#tymethod.fmt_header">Read more</a></p>
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