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<meta name="description" content="API documentation for the Rust `encoder` mod in crate `hpack`.">
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<meta name="keywords" content="rust, rustlang, rust-lang, encoder">
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<title>hpack::encoder - Rust</title>
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<nav class="sidebar">
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<p class='location'><a href='../index.html'>hpack</a></p><script>window.sidebarCurrent = {name: 'encoder', ty: 'mod', relpath: '../'};</script><script defer src="../sidebar-items.js"></script>
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<section id='main' class="content mod">
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<h1 class='fqn'><span class='in-band'>Module <a href='../index.html'>hpack</a>::<wbr><a class='mod' href=''>encoder</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-12' class='srclink' href='../../src/hpack/encoder.rs.html#1-391' title='goto source code'>[src]</a></span></h1>
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<div class='docblock'><p>Implements all functionality related to encoding header blocks using
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HPACK.</p>
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<p>Clients should use the <code>Encoder</code> struct as the API for performing HPACK
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encoding.</p>
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<h1 id='examples' class='section-header'><a href='#examples'>Examples</a></h1>
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<p>Encodes a header using a literal encoding.</p>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>hpack</span>::<span class='ident'>Encoder</span>;
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>encoder</span> <span class='op'>=</span> <span class='ident'>Encoder</span>::<span class='ident'>new</span>();
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<span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[
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(<span class='string'>b"custom-key"</span>.<span class='ident'>to_vec</span>(), <span class='string'>b"custom-value"</span>.<span class='ident'>to_vec</span>()),
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];
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<span class='comment'>// First encoding...</span>
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<span class='kw'>let</span> <span class='ident'>result</span> <span class='op'>=</span> <span class='ident'>encoder</span>.<span class='ident'>encode</span>(<span class='kw-2'>&</span><span class='ident'>headers</span>);
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<span class='comment'>// The result is a literal encoding of the header name and value, with an</span>
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<span class='comment'>// initial byte representing the type of the encoding</span>
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<span class='comment'>// (incremental indexing).</span>
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<span class='macro'>assert_eq</span><span class='macro'>!</span>(
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<span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>0x40</span>,
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<span class='number'>10</span>, <span class='string'>b'c'</span>, <span class='string'>b'u'</span>, <span class='string'>b's'</span>, <span class='string'>b't'</span>, <span class='string'>b'o'</span>, <span class='string'>b'm'</span>, <span class='string'>b'-'</span>, <span class='string'>b'k'</span>, <span class='string'>b'e'</span>, <span class='string'>b'y'</span>,
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<span class='number'>12</span>, <span class='string'>b'c'</span>, <span class='string'>b'u'</span>, <span class='string'>b's'</span>, <span class='string'>b't'</span>, <span class='string'>b'o'</span>, <span class='string'>b'm'</span>, <span class='string'>b'-'</span>, <span class='string'>b'v'</span>, <span class='string'>b'a'</span>, <span class='string'>b'l'</span>,
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<span class='string'>b'u'</span>, <span class='string'>b'e'</span>],
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<span class='ident'>result</span>);</pre>
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<p>Encodes some pseudo-headers that are already found in the static table.</p>
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<pre class='rust rust-example-rendered'>
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<span class='kw'>use</span> <span class='ident'>hpack</span>::<span class='ident'>Encoder</span>;
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>encoder</span> <span class='op'>=</span> <span class='ident'>Encoder</span>::<span class='ident'>new</span>();
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<span class='kw'>let</span> <span class='ident'>headers</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[
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(<span class='string'>b":method"</span>.<span class='ident'>to_vec</span>(), <span class='string'>b"GET"</span>.<span class='ident'>to_vec</span>()),
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(<span class='string'>b":path"</span>.<span class='ident'>to_vec</span>(), <span class='string'>b"/"</span>.<span class='ident'>to_vec</span>()),
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];
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<span class='comment'>// The headers are encoded by providing their index (with a bit flag</span>
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<span class='comment'>// indicating that the indexed representation is used).</span>
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<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>encoder</span>.<span class='ident'>encode</span>(<span class='kw-2'>&</span><span class='ident'>headers</span>), <span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>2</span> <span class='op'>|</span> <span class='number'>0x80</span>, <span class='number'>4</span> <span class='op'>|</span> <span class='number'>0x80</span>]);</pre>
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</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class='struct' href='struct.Encoder.html'
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title='hpack::encoder::Encoder'>Encoder</a></td>
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<td class='docblock short'>
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<p>Represents an HPACK encoder. Allows clients to encode arbitrary header sets
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and tracks the encoding context. That is, encoding subsequent header sets
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will use the context built by previous encode calls.</p>
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</td>
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</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
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<table>
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<tr class=' module-item'>
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<td><a class='fn' href='fn.encode_integer.html'
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title='hpack::encoder::encode_integer'>encode_integer</a></td>
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<td class='docblock short'>
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<p>Encode an integer to the representation defined by HPACK.</p>
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</td>
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</tr></table></section>
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