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<!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/hyper-0.14.26/src/proto/h2/server.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>server.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="../../../../hyper/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="../../../../hyper/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>std::error::Error <span class="kw">as </span>StdError;
<span class="kw">use </span>std::marker::Unpin;
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span><span class="kw">use </span>std::time::Duration;
<span class="kw">use </span>bytes::Bytes;
<span class="kw">use </span>h2::server::{Connection, Handshake, SendResponse};
<span class="kw">use </span>h2::{Reason, RecvStream};
<span class="kw">use </span>http::{Method, Request};
<span class="kw">use </span>pin_project_lite::pin_project;
<span class="kw">use </span>tokio::io::{AsyncRead, AsyncWrite};
<span class="kw">use </span>tracing::{debug, trace, warn};
<span class="kw">use super</span>::{ping, PipeToSendStream, SendBuf};
<span class="kw">use </span><span class="kw">crate</span>::body::HttpBody;
<span class="kw">use </span><span class="kw">crate</span>::common::exec::ConnStreamExec;
<span class="kw">use </span><span class="kw">crate</span>::common::{date, task, Future, Pin, Poll};
<span class="kw">use </span><span class="kw">crate</span>::ext::Protocol;
<span class="kw">use </span><span class="kw">crate</span>::headers;
<span class="kw">use </span><span class="kw">crate</span>::proto::h2::ping::Recorder;
<span class="kw">use </span><span class="kw">crate</span>::proto::h2::{H2Upgraded, UpgradedSendStream};
<span class="kw">use </span><span class="kw">crate</span>::proto::Dispatched;
<span class="kw">use </span><span class="kw">crate</span>::service::HttpService;
<span class="kw">use </span><span class="kw">crate</span>::upgrade::{OnUpgrade, Pending, Upgraded};
<span class="kw">use crate</span>::{Body, Response};
<span class="comment">// Our defaults are chosen for the &quot;majority&quot; case, which usually are not
// resource constrained, and so the spec default of 64kb can be too limiting
// for performance.
//
// At the same time, a server more often has multiple clients connected, and
// so is more likely to use more resources than a client would.
</span><span class="kw">const </span>DEFAULT_CONN_WINDOW: u32 = <span class="number">1024 </span>* <span class="number">1024</span>; <span class="comment">// 1mb
</span><span class="kw">const </span>DEFAULT_STREAM_WINDOW: u32 = <span class="number">1024 </span>* <span class="number">1024</span>; <span class="comment">// 1mb
</span><span class="kw">const </span>DEFAULT_MAX_FRAME_SIZE: u32 = <span class="number">1024 </span>* <span class="number">16</span>; <span class="comment">// 16kb
</span><span class="kw">const </span>DEFAULT_MAX_SEND_BUF_SIZE: usize = <span class="number">1024 </span>* <span class="number">400</span>; <span class="comment">// 400kb
// 16 MB &quot;sane default&quot; taken from golang http2
</span><span class="kw">const </span>DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE: u32 = <span class="number">16 </span>&lt;&lt; <span class="number">20</span>;
<span class="attribute">#[derive(Clone, Debug)]
</span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Config {
<span class="kw">pub</span>(<span class="kw">crate</span>) adaptive_window: bool,
<span class="kw">pub</span>(<span class="kw">crate</span>) initial_conn_window_size: u32,
<span class="kw">pub</span>(<span class="kw">crate</span>) initial_stream_window_size: u32,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_frame_size: u32,
<span class="kw">pub</span>(<span class="kw">crate</span>) enable_connect_protocol: bool,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_concurrent_streams: <span class="prelude-ty">Option</span>&lt;u32&gt;,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_pending_accept_reset_streams: <span class="prelude-ty">Option</span>&lt;usize&gt;,
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span><span class="kw">pub</span>(<span class="kw">crate</span>) keep_alive_interval: <span class="prelude-ty">Option</span>&lt;Duration&gt;,
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span><span class="kw">pub</span>(<span class="kw">crate</span>) keep_alive_timeout: Duration,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_send_buffer_size: usize,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_header_list_size: u32,
}
<span class="kw">impl </span>Default <span class="kw">for </span>Config {
<span class="kw">fn </span>default() -&gt; Config {
Config {
adaptive_window: <span class="bool-val">false</span>,
initial_conn_window_size: DEFAULT_CONN_WINDOW,
initial_stream_window_size: DEFAULT_STREAM_WINDOW,
max_frame_size: DEFAULT_MAX_FRAME_SIZE,
enable_connect_protocol: <span class="bool-val">false</span>,
max_concurrent_streams: <span class="prelude-val">None</span>,
max_pending_accept_reset_streams: <span class="prelude-val">None</span>,
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_interval: <span class="prelude-val">None</span>,
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_timeout: Duration::from_secs(<span class="number">20</span>),
max_send_buffer_size: DEFAULT_MAX_SEND_BUF_SIZE,
max_header_list_size: DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE,
}
}
}
<span class="macro">pin_project! </span>{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Server&lt;T, S, B, E&gt;
<span class="kw">where
</span>S: HttpService&lt;Body&gt;,
B: HttpBody,
{
exec: E,
service: S,
state: State&lt;T, B&gt;,
}
}
<span class="kw">enum </span>State&lt;T, B&gt;
<span class="kw">where
</span>B: HttpBody,
{
Handshaking {
ping_config: ping::Config,
hs: Handshake&lt;T, SendBuf&lt;B::Data&gt;&gt;,
},
Serving(Serving&lt;T, B&gt;),
Closed,
}
<span class="kw">struct </span>Serving&lt;T, B&gt;
<span class="kw">where
</span>B: HttpBody,
{
ping: <span class="prelude-ty">Option</span>&lt;(ping::Recorder, ping::Ponger)&gt;,
conn: Connection&lt;T, SendBuf&lt;B::Data&gt;&gt;,
closing: <span class="prelude-ty">Option</span>&lt;<span class="kw">crate</span>::Error&gt;,
}
<span class="kw">impl</span>&lt;T, S, B, E&gt; Server&lt;T, S, B, E&gt;
<span class="kw">where
</span>T: AsyncRead + AsyncWrite + Unpin,
S: HttpService&lt;Body, ResBody = B&gt;,
S::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
B: HttpBody + <span class="lifetime">&#39;static</span>,
E: ConnStreamExec&lt;S::Future, B&gt;,
{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(io: T, service: S, config: <span class="kw-2">&amp;</span>Config, exec: E) -&gt; Server&lt;T, S, B, E&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>builder = h2::server::Builder::default();
builder
.initial_window_size(config.initial_stream_window_size)
.initial_connection_window_size(config.initial_conn_window_size)
.max_frame_size(config.max_frame_size)
.max_header_list_size(config.max_header_list_size)
.max_send_buffer_size(config.max_send_buffer_size);
<span class="kw">if let </span><span class="prelude-val">Some</span>(max) = config.max_concurrent_streams {
builder.max_concurrent_streams(max);
}
<span class="kw">if let </span><span class="prelude-val">Some</span>(max) = config.max_pending_accept_reset_streams {
builder.max_pending_accept_reset_streams(max);
}
<span class="kw">if </span>config.enable_connect_protocol {
builder.enable_connect_protocol();
}
<span class="kw">let </span>handshake = builder.handshake(io);
<span class="kw">let </span>bdp = <span class="kw">if </span>config.adaptive_window {
<span class="prelude-val">Some</span>(config.initial_stream_window_size)
} <span class="kw">else </span>{
<span class="prelude-val">None
</span>};
<span class="kw">let </span>ping_config = ping::Config {
bdp_initial_window: bdp,
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_interval: config.keep_alive_interval,
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_timeout: config.keep_alive_timeout,
<span class="comment">// If keep-alive is enabled for servers, always enabled while
// idle, so it can more aggressively close dead connections.
</span><span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_while_idle: <span class="bool-val">true</span>,
};
Server {
exec,
state: State::Handshaking {
ping_config,
hs: handshake,
},
service,
}
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>graceful_shutdown(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
<span class="macro">trace!</span>(<span class="string">&quot;graceful_shutdown&quot;</span>);
<span class="kw">match </span><span class="self">self</span>.state {
State::Handshaking { .. } =&gt; {
<span class="comment">// fall-through, to replace state with Closed
</span>}
State::Serving(<span class="kw-2">ref mut </span>srv) =&gt; {
<span class="kw">if </span>srv.closing.is_none() {
srv.conn.graceful_shutdown();
}
<span class="kw">return</span>;
}
State::Closed =&gt; {
<span class="kw">return</span>;
}
}
<span class="self">self</span>.state = State::Closed;
}
}
<span class="kw">impl</span>&lt;T, S, B, E&gt; Future <span class="kw">for </span>Server&lt;T, S, B, E&gt;
<span class="kw">where
</span>T: AsyncRead + AsyncWrite + Unpin,
S: HttpService&lt;Body, ResBody = B&gt;,
S::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
B: HttpBody + <span class="lifetime">&#39;static</span>,
E: ConnStreamExec&lt;S::Future, B&gt;,
{
<span class="kw">type </span>Output = <span class="kw">crate</span>::Result&lt;Dispatched&gt;;
<span class="kw">fn </span>poll(<span class="kw-2">mut </span><span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;, cx: <span class="kw-2">&amp;mut </span>task::Context&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; Poll&lt;<span class="self">Self</span>::Output&gt; {
<span class="kw">let </span>me = <span class="kw-2">&amp;mut *</span><span class="self">self</span>;
<span class="kw">loop </span>{
<span class="kw">let </span>next = <span class="kw">match </span>me.state {
State::Handshaking {
<span class="kw-2">ref mut </span>hs,
<span class="kw-2">ref </span>ping_config,
} =&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>conn = <span class="macro">ready!</span>(Pin::new(hs).poll(cx).map_err(<span class="kw">crate</span>::Error::new_h2))<span class="question-mark">?</span>;
<span class="kw">let </span>ping = <span class="kw">if </span>ping_config.is_enabled() {
<span class="kw">let </span>pp = conn.ping_pong().expect(<span class="string">&quot;conn.ping_pong&quot;</span>);
<span class="prelude-val">Some</span>(ping::channel(pp, ping_config.clone()))
} <span class="kw">else </span>{
<span class="prelude-val">None
</span>};
State::Serving(Serving {
ping,
conn,
closing: <span class="prelude-val">None</span>,
})
}
State::Serving(<span class="kw-2">ref mut </span>srv) =&gt; {
<span class="macro">ready!</span>(srv.poll_server(cx, <span class="kw-2">&amp;mut </span>me.service, <span class="kw-2">&amp;mut </span>me.exec))<span class="question-mark">?</span>;
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(Dispatched::Shutdown));
}
State::Closed =&gt; {
<span class="comment">// graceful_shutdown was called before handshaking finished,
// nothing to do here...
</span><span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(Dispatched::Shutdown));
}
};
me.state = next;
}
}
}
<span class="kw">impl</span>&lt;T, B&gt; Serving&lt;T, B&gt;
<span class="kw">where
</span>T: AsyncRead + AsyncWrite + Unpin,
B: HttpBody + <span class="lifetime">&#39;static</span>,
{
<span class="kw">fn </span>poll_server&lt;S, E&gt;(
<span class="kw-2">&amp;mut </span><span class="self">self</span>,
cx: <span class="kw-2">&amp;mut </span>task::Context&lt;<span class="lifetime">&#39;_</span>&gt;,
service: <span class="kw-2">&amp;mut </span>S,
exec: <span class="kw-2">&amp;mut </span>E,
) -&gt; Poll&lt;<span class="kw">crate</span>::Result&lt;()&gt;&gt;
<span class="kw">where
</span>S: HttpService&lt;Body, ResBody = B&gt;,
S::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
E: ConnStreamExec&lt;S::Future, B&gt;,
{
<span class="kw">if </span><span class="self">self</span>.closing.is_none() {
<span class="kw">loop </span>{
<span class="self">self</span>.poll_ping(cx);
<span class="comment">// Check that the service is ready to accept a new request.
//
// - If not, just drive the connection some.
// - If ready, try to accept a new request from the connection.
</span><span class="kw">match </span>service.poll_ready(cx) {
Poll::Ready(<span class="prelude-val">Ok</span>(())) =&gt; (),
Poll::Pending =&gt; {
<span class="comment">// use `poll_closed` instead of `poll_accept`,
// in order to avoid accepting a request.
</span><span class="macro">ready!</span>(<span class="self">self</span>.conn.poll_closed(cx).map_err(<span class="kw">crate</span>::Error::new_h2))<span class="question-mark">?</span>;
<span class="macro">trace!</span>(<span class="string">&quot;incoming connection complete&quot;</span>);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(()));
}
Poll::Ready(<span class="prelude-val">Err</span>(err)) =&gt; {
<span class="kw">let </span>err = <span class="kw">crate</span>::Error::new_user_service(err);
<span class="macro">debug!</span>(<span class="string">&quot;service closed: {}&quot;</span>, err);
<span class="kw">let </span>reason = err.h2_reason();
<span class="kw">if </span>reason == Reason::NO_ERROR {
<span class="comment">// NO_ERROR is only used for graceful shutdowns...
</span><span class="macro">trace!</span>(<span class="string">&quot;interpreting NO_ERROR user error as graceful_shutdown&quot;</span>);
<span class="self">self</span>.conn.graceful_shutdown();
} <span class="kw">else </span>{
<span class="macro">trace!</span>(<span class="string">&quot;abruptly shutting down with {:?}&quot;</span>, reason);
<span class="self">self</span>.conn.abrupt_shutdown(reason);
}
<span class="self">self</span>.closing = <span class="prelude-val">Some</span>(err);
<span class="kw">break</span>;
}
}
<span class="comment">// When the service is ready, accepts an incoming request.
</span><span class="kw">match </span><span class="macro">ready!</span>(<span class="self">self</span>.conn.poll_accept(cx)) {
<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>((req, <span class="kw-2">mut </span>respond))) =&gt; {
<span class="macro">trace!</span>(<span class="string">&quot;incoming request&quot;</span>);
<span class="kw">let </span>content_length = headers::content_length_parse_all(req.headers());
<span class="kw">let </span>ping = <span class="self">self
</span>.ping
.as_ref()
.map(|ping| ping.<span class="number">0</span>.clone())
.unwrap_or_else(ping::disabled);
<span class="comment">// Record the headers received
</span>ping.record_non_data();
<span class="kw">let </span>is_connect = req.method() == Method::CONNECT;
<span class="kw">let </span>(<span class="kw-2">mut </span>parts, stream) = req.into_parts();
<span class="kw">let </span>(<span class="kw-2">mut </span>req, connect_parts) = <span class="kw">if </span>!is_connect {
(
Request::from_parts(
parts,
<span class="kw">crate</span>::Body::h2(stream, content_length.into(), ping),
),
<span class="prelude-val">None</span>,
)
} <span class="kw">else </span>{
<span class="kw">if </span>content_length.map_or(<span class="bool-val">false</span>, |len| len != <span class="number">0</span>) {
<span class="macro">warn!</span>(<span class="string">&quot;h2 connect request with non-zero body not supported&quot;</span>);
respond.send_reset(h2::Reason::INTERNAL_ERROR);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(()));
}
<span class="kw">let </span>(pending, upgrade) = <span class="kw">crate</span>::upgrade::pending();
<span class="macro">debug_assert!</span>(parts.extensions.get::&lt;OnUpgrade&gt;().is_none());
parts.extensions.insert(upgrade);
(
Request::from_parts(parts, <span class="kw">crate</span>::Body::empty()),
<span class="prelude-val">Some</span>(ConnectParts {
pending,
ping,
recv_stream: stream,
}),
)
};
<span class="kw">if let </span><span class="prelude-val">Some</span>(protocol) = req.extensions_mut().remove::&lt;h2::ext::Protocol&gt;() {
req.extensions_mut().insert(Protocol::from_inner(protocol));
}
<span class="kw">let </span>fut = H2Stream::new(service.call(req), connect_parts, respond);
exec.execute_h2stream(fut);
}
<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(e)) =&gt; {
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_h2(e)));
}
<span class="prelude-val">None </span>=&gt; {
<span class="comment">// no more incoming streams...
</span><span class="kw">if let </span><span class="prelude-val">Some</span>((<span class="kw-2">ref </span>ping, <span class="kw">_</span>)) = <span class="self">self</span>.ping {
ping.ensure_not_timed_out()<span class="question-mark">?</span>;
}
<span class="macro">trace!</span>(<span class="string">&quot;incoming connection complete&quot;</span>);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(()));
}
}
}
}
<span class="macro">debug_assert!</span>(
<span class="self">self</span>.closing.is_some(),
<span class="string">&quot;poll_server broke loop without closing&quot;
</span>);
<span class="macro">ready!</span>(<span class="self">self</span>.conn.poll_closed(cx).map_err(<span class="kw">crate</span>::Error::new_h2))<span class="question-mark">?</span>;
Poll::Ready(<span class="prelude-val">Err</span>(<span class="self">self</span>.closing.take().expect(<span class="string">&quot;polled after error&quot;</span>)))
}
<span class="kw">fn </span>poll_ping(<span class="kw-2">&amp;mut </span><span class="self">self</span>, cx: <span class="kw-2">&amp;mut </span>task::Context&lt;<span class="lifetime">&#39;_</span>&gt;) {
<span class="kw">if let </span><span class="prelude-val">Some</span>((<span class="kw">_</span>, <span class="kw-2">ref mut </span>estimator)) = <span class="self">self</span>.ping {
<span class="kw">match </span>estimator.poll(cx) {
Poll::Ready(ping::Ponged::SizeUpdate(wnd)) =&gt; {
<span class="self">self</span>.conn.set_target_window_size(wnd);
<span class="kw">let _ </span>= <span class="self">self</span>.conn.set_initial_window_size(wnd);
}
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>Poll::Ready(ping::Ponged::KeepAliveTimedOut) =&gt; {
<span class="macro">debug!</span>(<span class="string">&quot;keep-alive timed out, closing connection&quot;</span>);
<span class="self">self</span>.conn.abrupt_shutdown(h2::Reason::NO_ERROR);
}
Poll::Pending =&gt; {}
}
}
}
}
<span class="macro">pin_project! </span>{
<span class="attribute">#[allow(missing_debug_implementations)]
</span><span class="kw">pub struct </span>H2Stream&lt;F, B&gt;
<span class="kw">where
</span>B: HttpBody,
{
reply: SendResponse&lt;SendBuf&lt;B::Data&gt;&gt;,
<span class="attribute">#[pin]
</span>state: H2StreamState&lt;F, B&gt;,
}
}
<span class="macro">pin_project! </span>{
<span class="attribute">#[project = H2StreamStateProj]
</span><span class="kw">enum </span>H2StreamState&lt;F, B&gt;
<span class="kw">where
</span>B: HttpBody,
{
Service {
<span class="attribute">#[pin]
</span>fut: F,
connect_parts: <span class="prelude-ty">Option</span>&lt;ConnectParts&gt;,
},
Body {
<span class="attribute">#[pin]
</span>pipe: PipeToSendStream&lt;B&gt;,
},
}
}
<span class="kw">struct </span>ConnectParts {
pending: Pending,
ping: Recorder,
recv_stream: RecvStream,
}
<span class="kw">impl</span>&lt;F, B&gt; H2Stream&lt;F, B&gt;
<span class="kw">where
</span>B: HttpBody,
{
<span class="kw">fn </span>new(
fut: F,
connect_parts: <span class="prelude-ty">Option</span>&lt;ConnectParts&gt;,
respond: SendResponse&lt;SendBuf&lt;B::Data&gt;&gt;,
) -&gt; H2Stream&lt;F, B&gt; {
H2Stream {
reply: respond,
state: H2StreamState::Service { fut, connect_parts },
}
}
}
<span class="macro">macro_rules! </span>reply {
(<span class="macro-nonterminal">$me</span>:expr, <span class="macro-nonterminal">$res</span>:expr, <span class="macro-nonterminal">$eos</span>:expr) =&gt; {{
<span class="kw">match </span><span class="macro-nonterminal">$me</span>.reply.send_response(<span class="macro-nonterminal">$res</span>, <span class="macro-nonterminal">$eos</span>) {
<span class="prelude-val">Ok</span>(tx) =&gt; tx,
<span class="prelude-val">Err</span>(e) =&gt; {
<span class="macro">debug!</span>(<span class="string">&quot;send response error: {}&quot;</span>, e);
<span class="macro-nonterminal">$me</span>.reply.send_reset(Reason::INTERNAL_ERROR);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_h2(e)));
}
}
}};
}
<span class="kw">impl</span>&lt;F, B, E&gt; H2Stream&lt;F, B&gt;
<span class="kw">where
</span>F: Future&lt;Output = <span class="prelude-ty">Result</span>&lt;Response&lt;B&gt;, E&gt;&gt;,
B: HttpBody,
B::Data: <span class="lifetime">&#39;static</span>,
B::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
E: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
{
<span class="kw">fn </span>poll2(<span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;, cx: <span class="kw-2">&amp;mut </span>task::Context&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; Poll&lt;<span class="kw">crate</span>::Result&lt;()&gt;&gt; {
<span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.project();
<span class="kw">loop </span>{
<span class="kw">let </span>next = <span class="kw">match </span>me.state.as_mut().project() {
H2StreamStateProj::Service {
fut: h,
connect_parts,
} =&gt; {
<span class="kw">let </span>res = <span class="kw">match </span>h.poll(cx) {
Poll::Ready(<span class="prelude-val">Ok</span>(r)) =&gt; r,
Poll::Pending =&gt; {
<span class="comment">// Response is not yet ready, so we want to check if the client has sent a
// RST_STREAM frame which would cancel the current request.
</span><span class="kw">if let </span>Poll::Ready(reason) =
me.reply.poll_reset(cx).map_err(<span class="kw">crate</span>::Error::new_h2)<span class="question-mark">?
</span>{
<span class="macro">debug!</span>(<span class="string">&quot;stream received RST_STREAM: {:?}&quot;</span>, reason);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_h2(reason.into())));
}
<span class="kw">return </span>Poll::Pending;
}
Poll::Ready(<span class="prelude-val">Err</span>(e)) =&gt; {
<span class="kw">let </span>err = <span class="kw">crate</span>::Error::new_user_service(e);
<span class="macro">warn!</span>(<span class="string">&quot;http2 service errored: {}&quot;</span>, err);
me.reply.send_reset(err.h2_reason());
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(err));
}
};
<span class="kw">let </span>(head, body) = res.into_parts();
<span class="kw">let </span><span class="kw-2">mut </span>res = ::http::Response::from_parts(head, ());
<span class="kw">super</span>::strip_connection_headers(res.headers_mut(), <span class="bool-val">false</span>);
<span class="comment">// set Date header if it isn&#39;t already set...
</span>res.headers_mut()
.entry(::http::header::DATE)
.or_insert_with(date::update_and_header_value);
<span class="kw">if let </span><span class="prelude-val">Some</span>(connect_parts) = connect_parts.take() {
<span class="kw">if </span>res.status().is_success() {
<span class="kw">if </span>headers::content_length_parse_all(res.headers())
.map_or(<span class="bool-val">false</span>, |len| len != <span class="number">0</span>)
{
<span class="macro">warn!</span>(<span class="string">&quot;h2 successful response to CONNECT request with body not supported&quot;</span>);
me.reply.send_reset(h2::Reason::INTERNAL_ERROR);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_user_header()));
}
<span class="kw">let </span>send_stream = <span class="macro">reply!</span>(me, res, <span class="bool-val">false</span>);
connect_parts.pending.fulfill(Upgraded::new(
H2Upgraded {
ping: connect_parts.ping,
recv_stream: connect_parts.recv_stream,
send_stream: <span class="kw">unsafe </span>{ UpgradedSendStream::new(send_stream) },
buf: Bytes::new(),
},
Bytes::new(),
));
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(()));
}
}
<span class="kw">if </span>!body.is_end_stream() {
<span class="comment">// automatically set Content-Length from body...
</span><span class="kw">if let </span><span class="prelude-val">Some</span>(len) = body.size_hint().exact() {
headers::set_content_length_if_missing(res.headers_mut(), len);
}
<span class="kw">let </span>body_tx = <span class="macro">reply!</span>(me, res, <span class="bool-val">false</span>);
H2StreamState::Body {
pipe: PipeToSendStream::new(body, body_tx),
}
} <span class="kw">else </span>{
<span class="macro">reply!</span>(me, res, <span class="bool-val">true</span>);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(()));
}
}
H2StreamStateProj::Body { pipe } =&gt; {
<span class="kw">return </span>pipe.poll(cx);
}
};
me.state.set(next);
}
}
}
<span class="kw">impl</span>&lt;F, B, E&gt; Future <span class="kw">for </span>H2Stream&lt;F, B&gt;
<span class="kw">where
</span>F: Future&lt;Output = <span class="prelude-ty">Result</span>&lt;Response&lt;B&gt;, E&gt;&gt;,
B: HttpBody,
B::Data: <span class="lifetime">&#39;static</span>,
B::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
E: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
{
<span class="kw">type </span>Output = ();
<span class="kw">fn </span>poll(<span class="self">self</span>: Pin&lt;<span class="kw-2">&amp;mut </span><span class="self">Self</span>&gt;, cx: <span class="kw-2">&amp;mut </span>task::Context&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; Poll&lt;<span class="self">Self</span>::Output&gt; {
<span class="self">self</span>.poll2(cx).map(|res| {
<span class="kw">if let </span><span class="prelude-val">Err</span>(e) = res {
<span class="macro">debug!</span>(<span class="string">&quot;stream error: {}&quot;</span>, e);
}
})
}
}
</code></pre></div>
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