| <!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="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/h2-0.3.19/src/frame/head.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>head.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../h2/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../h2/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">super</span>::StreamId; |
| |
| <span class="kw">use </span>bytes::BufMut; |
| |
| <span class="attribute">#[derive(Debug, Copy, Clone, PartialEq, Eq)] |
| </span><span class="kw">pub struct </span>Head { |
| kind: Kind, |
| flag: u8, |
| stream_id: StreamId, |
| } |
| |
| <span class="attribute">#[repr(u8)] |
| #[derive(Debug, Copy, Clone, PartialEq, Eq)] |
| </span><span class="kw">pub enum </span>Kind { |
| Data = <span class="number">0</span>, |
| Headers = <span class="number">1</span>, |
| Priority = <span class="number">2</span>, |
| Reset = <span class="number">3</span>, |
| Settings = <span class="number">4</span>, |
| PushPromise = <span class="number">5</span>, |
| Ping = <span class="number">6</span>, |
| GoAway = <span class="number">7</span>, |
| WindowUpdate = <span class="number">8</span>, |
| Continuation = <span class="number">9</span>, |
| Unknown, |
| } |
| |
| <span class="comment">// ===== impl Head ===== |
| |
| </span><span class="kw">impl </span>Head { |
| <span class="kw">pub fn </span>new(kind: Kind, flag: u8, stream_id: StreamId) -> Head { |
| Head { |
| kind, |
| flag, |
| stream_id, |
| } |
| } |
| |
| <span class="doccomment">/// Parse an HTTP/2 frame header |
| </span><span class="kw">pub fn </span>parse(header: <span class="kw-2">&</span>[u8]) -> Head { |
| <span class="kw">let </span>(stream_id, <span class="kw">_</span>) = StreamId::parse(<span class="kw-2">&</span>header[<span class="number">5</span>..]); |
| |
| Head { |
| kind: Kind::new(header[<span class="number">3</span>]), |
| flag: header[<span class="number">4</span>], |
| stream_id, |
| } |
| } |
| |
| <span class="kw">pub fn </span>stream_id(<span class="kw-2">&</span><span class="self">self</span>) -> StreamId { |
| <span class="self">self</span>.stream_id |
| } |
| |
| <span class="kw">pub fn </span>kind(<span class="kw-2">&</span><span class="self">self</span>) -> Kind { |
| <span class="self">self</span>.kind |
| } |
| |
| <span class="kw">pub fn </span>flag(<span class="kw-2">&</span><span class="self">self</span>) -> u8 { |
| <span class="self">self</span>.flag |
| } |
| |
| <span class="kw">pub fn </span>encode_len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">super</span>::HEADER_LEN |
| } |
| |
| <span class="kw">pub fn </span>encode<T: BufMut>(<span class="kw-2">&</span><span class="self">self</span>, payload_len: usize, dst: <span class="kw-2">&mut </span>T) { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.encode_len() <= dst.remaining_mut()); |
| |
| dst.put_uint(payload_len <span class="kw">as </span>u64, <span class="number">3</span>); |
| dst.put_u8(<span class="self">self</span>.kind <span class="kw">as </span>u8); |
| dst.put_u8(<span class="self">self</span>.flag); |
| dst.put_u32(<span class="self">self</span>.stream_id.into()); |
| } |
| } |
| |
| <span class="comment">// ===== impl Kind ===== |
| |
| </span><span class="kw">impl </span>Kind { |
| <span class="kw">pub fn </span>new(byte: u8) -> Kind { |
| <span class="kw">match </span>byte { |
| <span class="number">0 </span>=> Kind::Data, |
| <span class="number">1 </span>=> Kind::Headers, |
| <span class="number">2 </span>=> Kind::Priority, |
| <span class="number">3 </span>=> Kind::Reset, |
| <span class="number">4 </span>=> Kind::Settings, |
| <span class="number">5 </span>=> Kind::PushPromise, |
| <span class="number">6 </span>=> Kind::Ping, |
| <span class="number">7 </span>=> Kind::GoAway, |
| <span class="number">8 </span>=> Kind::WindowUpdate, |
| <span class="number">9 </span>=> Kind::Continuation, |
| <span class="kw">_ </span>=> Kind::Unknown, |
| } |
| } |
| } |
| </code></pre></div> |
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