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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/client.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>client.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="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>futures_channel::{mpsc, oneshot};
<span class="kw">use </span>futures_util::future::{<span class="self">self</span>, Either, FutureExt <span class="kw">as _</span>, TryFutureExt <span class="kw">as _</span>};
<span class="kw">use </span>futures_util::stream::StreamExt <span class="kw">as _</span>;
<span class="kw">use </span>h2::client::{Builder, SendRequest};
<span class="kw">use </span>h2::SendStream;
<span class="kw">use </span>http::{Method, StatusCode};
<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, H2Upgraded, PipeToSendStream, SendBuf};
<span class="kw">use </span><span class="kw">crate</span>::body::HttpBody;
<span class="kw">use </span><span class="kw">crate</span>::client::dispatch::Callback;
<span class="kw">use </span><span class="kw">crate</span>::common::{exec::Exec, task, Future, Never, 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::UpgradedSendStream;
<span class="kw">use </span><span class="kw">crate</span>::proto::Dispatched;
<span class="kw">use </span><span class="kw">crate</span>::upgrade::Upgraded;
<span class="kw">use crate</span>::{Body, Request, Response};
<span class="kw">use </span>h2::client::ResponseFuture;
<span class="kw">type </span>ClientRx&lt;B&gt; = <span class="kw">crate</span>::client::dispatch::Receiver&lt;Request&lt;B&gt;, Response&lt;Body&gt;&gt;;
<span class="comment">///// An mpsc channel is used to help notify the `Connection` task when *all*
///// other handles to it have been dropped, so that it can shutdown.
</span><span class="kw">type </span>ConnDropRef = mpsc::Sender&lt;Never&gt;;
<span class="comment">///// A oneshot channel watches the `Connection` task, and when it completes,
///// the &quot;dispatch&quot; task will be notified and can shutdown sooner.
</span><span class="kw">type </span>ConnEof = oneshot::Receiver&lt;Never&gt;;
<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.
</span><span class="kw">const </span>DEFAULT_CONN_WINDOW: u32 = <span class="number">1024 </span>* <span class="number">1024 </span>* <span class="number">5</span>; <span class="comment">// 5mb
</span><span class="kw">const </span>DEFAULT_STREAM_WINDOW: u32 = <span class="number">1024 </span>* <span class="number">1024 </span>* <span class="number">2</span>; <span class="comment">// 2mb
</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">1024</span>; <span class="comment">// 1mb
</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="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="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span><span class="kw">pub</span>(<span class="kw">crate</span>) keep_alive_while_idle: bool,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_concurrent_reset_streams: <span class="prelude-ty">Option</span>&lt;usize&gt;,
<span class="kw">pub</span>(<span class="kw">crate</span>) max_send_buffer_size: usize,
}
<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,
<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>),
<span class="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_while_idle: <span class="bool-val">false</span>,
max_concurrent_reset_streams: <span class="prelude-val">None</span>,
max_send_buffer_size: DEFAULT_MAX_SEND_BUF_SIZE,
}
}
}
<span class="kw">fn </span>new_builder(config: <span class="kw-2">&amp;</span>Config) -&gt; Builder {
<span class="kw">let </span><span class="kw-2">mut </span>builder = 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_send_buffer_size(config.max_send_buffer_size)
.enable_push(<span class="bool-val">false</span>);
<span class="kw">if let </span><span class="prelude-val">Some</span>(max) = config.max_concurrent_reset_streams {
builder.max_concurrent_reset_streams(max);
}
builder
}
<span class="kw">fn </span>new_ping_config(config: <span class="kw-2">&amp;</span>Config) -&gt; ping::Config {
ping::Config {
bdp_initial_window: <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="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="attribute">#[cfg(feature = <span class="string">&quot;runtime&quot;</span>)]
</span>keep_alive_while_idle: config.keep_alive_while_idle,
}
}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">async fn </span>handshake&lt;T, B&gt;(
io: T,
req_rx: ClientRx&lt;B&gt;,
config: <span class="kw-2">&amp;</span>Config,
exec: Exec,
) -&gt; <span class="kw">crate</span>::Result&lt;ClientTask&lt;B&gt;&gt;
<span class="kw">where
</span>T: AsyncRead + AsyncWrite + Send + Unpin + <span class="lifetime">&#39;static</span>,
B: HttpBody,
B::Data: Send + <span class="lifetime">&#39;static</span>,
{
<span class="kw">let </span>(h2_tx, <span class="kw-2">mut </span>conn) = new_builder(config)
.handshake::&lt;<span class="kw">_</span>, SendBuf&lt;B::Data&gt;&gt;(io)
.<span class="kw">await
</span>.map_err(<span class="kw">crate</span>::Error::new_h2)<span class="question-mark">?</span>;
<span class="comment">// An mpsc channel is used entirely to detect when the
// &#39;Client&#39; has been dropped. This is to get around a bug
// in h2 where dropping all SendRequests won&#39;t notify a
// parked Connection.
</span><span class="kw">let </span>(conn_drop_ref, rx) = mpsc::channel(<span class="number">1</span>);
<span class="kw">let </span>(cancel_tx, conn_eof) = oneshot::channel();
<span class="kw">let </span>conn_drop_rx = rx.into_future().map(|(item, _rx)| {
<span class="kw">if let </span><span class="prelude-val">Some</span>(never) = item {
<span class="kw">match </span>never {}
}
});
<span class="kw">let </span>ping_config = new_ping_config(<span class="kw-2">&amp;</span>config);
<span class="kw">let </span>(conn, 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="kw">let </span>(recorder, <span class="kw-2">mut </span>ponger) = ping::channel(pp, ping_config);
<span class="kw">let </span>conn = future::poll_fn(<span class="kw">move </span>|cx| {
<span class="kw">match </span>ponger.poll(cx) {
Poll::Ready(ping::Ponged::SizeUpdate(wnd)) =&gt; {
conn.set_target_window_size(wnd);
conn.set_initial_window_size(wnd)<span class="question-mark">?</span>;
}
<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;connection keep-alive timed out&quot;</span>);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(()));
}
Poll::Pending =&gt; {}
}
Pin::new(<span class="kw-2">&amp;mut </span>conn).poll(cx)
});
(Either::Left(conn), recorder)
} <span class="kw">else </span>{
(Either::Right(conn), ping::disabled())
};
<span class="kw">let </span>conn = conn.map_err(|e| <span class="macro">debug!</span>(<span class="string">&quot;connection error: {}&quot;</span>, e));
exec.execute(conn_task(conn, conn_drop_rx, cancel_tx));
<span class="prelude-val">Ok</span>(ClientTask {
ping,
conn_drop_ref,
conn_eof,
executor: exec,
h2_tx,
req_rx,
fut_ctx: <span class="prelude-val">None</span>,
})
}
<span class="kw">async fn </span>conn_task&lt;C, D&gt;(conn: C, drop_rx: D, cancel_tx: oneshot::Sender&lt;Never&gt;)
<span class="kw">where
</span>C: Future + Unpin,
D: Future&lt;Output = ()&gt; + Unpin,
{
<span class="kw">match </span>future::select(conn, drop_rx).<span class="kw">await </span>{
Either::Left(<span class="kw">_</span>) =&gt; {
<span class="comment">// ok or err, the `conn` has finished
</span>}
Either::Right(((), conn)) =&gt; {
<span class="comment">// mpsc has been dropped, hopefully polling
// the connection some more should start shutdown
// and then close
</span><span class="macro">trace!</span>(<span class="string">&quot;send_request dropped, starting conn shutdown&quot;</span>);
drop(cancel_tx);
<span class="kw">let _ </span>= conn.<span class="kw">await</span>;
}
}
}
<span class="kw">struct </span>FutCtx&lt;B&gt;
<span class="kw">where
</span>B: HttpBody,
{
is_connect: bool,
eos: bool,
fut: ResponseFuture,
body_tx: SendStream&lt;SendBuf&lt;B::Data&gt;&gt;,
body: B,
cb: Callback&lt;Request&lt;B&gt;, Response&lt;Body&gt;&gt;,
}
<span class="kw">impl</span>&lt;B: HttpBody&gt; Unpin <span class="kw">for </span>FutCtx&lt;B&gt; {}
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>ClientTask&lt;B&gt;
<span class="kw">where
</span>B: HttpBody,
{
ping: ping::Recorder,
conn_drop_ref: ConnDropRef,
conn_eof: ConnEof,
executor: Exec,
h2_tx: SendRequest&lt;SendBuf&lt;B::Data&gt;&gt;,
req_rx: ClientRx&lt;B&gt;,
fut_ctx: <span class="prelude-ty">Option</span>&lt;FutCtx&lt;B&gt;&gt;,
}
<span class="kw">impl</span>&lt;B&gt; ClientTask&lt;B&gt;
<span class="kw">where
</span>B: HttpBody + <span class="lifetime">&#39;static</span>,
{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>is_extended_connect_protocol_enabled(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; bool {
<span class="self">self</span>.h2_tx.is_extended_connect_protocol_enabled()
}
}
<span class="kw">impl</span>&lt;B&gt; ClientTask&lt;B&gt;
<span class="kw">where
</span>B: HttpBody + Send + <span class="lifetime">&#39;static</span>,
B::Data: Send,
B::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&gt;,
{
<span class="kw">fn </span>poll_pipe(<span class="kw-2">&amp;mut </span><span class="self">self</span>, f: FutCtx&lt;B&gt;, cx: <span class="kw-2">&amp;mut </span>task::Context&lt;<span class="lifetime">&#39;_</span>&gt;) {
<span class="kw">let </span>ping = <span class="self">self</span>.ping.clone();
<span class="kw">let </span>send_stream = <span class="kw">if </span>!f.is_connect {
<span class="kw">if </span>!f.eos {
<span class="kw">let </span><span class="kw-2">mut </span>pipe = Box::pin(PipeToSendStream::new(f.body, f.body_tx)).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;client request body error: {}&quot;</span>, e);
}
});
<span class="comment">// eagerly see if the body pipe is ready and
// can thus skip allocating in the executor
</span><span class="kw">match </span>Pin::new(<span class="kw-2">&amp;mut </span>pipe).poll(cx) {
Poll::Ready(<span class="kw">_</span>) =&gt; (),
Poll::Pending =&gt; {
<span class="kw">let </span>conn_drop_ref = <span class="self">self</span>.conn_drop_ref.clone();
<span class="comment">// keep the ping recorder&#39;s knowledge of an
// &quot;open stream&quot; alive while this body is
// still sending...
</span><span class="kw">let </span>ping = ping.clone();
<span class="kw">let </span>pipe = pipe.map(<span class="kw">move </span>|x| {
drop(conn_drop_ref);
drop(ping);
x
});
<span class="comment">// Clear send task
</span><span class="self">self</span>.executor.execute(pipe);
}
}
}
<span class="prelude-val">None
</span>} <span class="kw">else </span>{
<span class="prelude-val">Some</span>(f.body_tx)
};
<span class="kw">let </span>fut = f.fut.map(<span class="kw">move </span>|result| <span class="kw">match </span>result {
<span class="prelude-val">Ok</span>(res) =&gt; {
<span class="comment">// record that we got the response headers
</span>ping.record_non_data();
<span class="kw">let </span>content_length = headers::content_length_parse_all(res.headers());
<span class="kw">if let </span>(<span class="prelude-val">Some</span>(<span class="kw-2">mut </span>send_stream), StatusCode::OK) = (send_stream, res.status()) {
<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 response with non-zero body not supported&quot;</span>);
send_stream.send_reset(h2::Reason::INTERNAL_ERROR);
<span class="kw">return </span><span class="prelude-val">Err</span>((
<span class="kw">crate</span>::Error::new_h2(h2::Reason::INTERNAL_ERROR.into()),
<span class="prelude-val">None</span>,
));
}
<span class="kw">let </span>(parts, recv_stream) = res.into_parts();
<span class="kw">let </span><span class="kw-2">mut </span>res = Response::from_parts(parts, Body::empty());
<span class="kw">let </span>(pending, on_upgrade) = <span class="kw">crate</span>::upgrade::pending();
<span class="kw">let </span>io = H2Upgraded {
ping,
send_stream: <span class="kw">unsafe </span>{ UpgradedSendStream::new(send_stream) },
recv_stream,
buf: Bytes::new(),
};
<span class="kw">let </span>upgraded = Upgraded::new(io, Bytes::new());
pending.fulfill(upgraded);
res.extensions_mut().insert(on_upgrade);
<span class="prelude-val">Ok</span>(res)
} <span class="kw">else </span>{
<span class="kw">let </span>res = res.map(|stream| {
<span class="kw">let </span>ping = ping.for_stream(<span class="kw-2">&amp;</span>stream);
<span class="kw">crate</span>::Body::h2(stream, content_length.into(), ping)
});
<span class="prelude-val">Ok</span>(res)
}
}
<span class="prelude-val">Err</span>(err) =&gt; {
ping.ensure_not_timed_out().map_err(|e| (e, <span class="prelude-val">None</span>))<span class="question-mark">?</span>;
<span class="macro">debug!</span>(<span class="string">&quot;client response error: {}&quot;</span>, err);
<span class="prelude-val">Err</span>((<span class="kw">crate</span>::Error::new_h2(err), <span class="prelude-val">None</span>))
}
});
<span class="self">self</span>.executor.execute(f.cb.send_when(fut));
}
}
<span class="kw">impl</span>&lt;B&gt; Future <span class="kw">for </span>ClientTask&lt;B&gt;
<span class="kw">where
</span>B: HttpBody + Send + <span class="lifetime">&#39;static</span>,
B::Data: Send,
B::Error: Into&lt;Box&lt;<span class="kw">dyn </span>StdError + Send + Sync&gt;&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">loop </span>{
<span class="kw">match </span><span class="macro">ready!</span>(<span class="self">self</span>.h2_tx.poll_ready(cx)) {
<span class="prelude-val">Ok</span>(()) =&gt; (),
<span class="prelude-val">Err</span>(err) =&gt; {
<span class="self">self</span>.ping.ensure_not_timed_out()<span class="question-mark">?</span>;
<span class="kw">return if </span>err.reason() == <span class="prelude-val">Some</span>(::h2::Reason::NO_ERROR) {
<span class="macro">trace!</span>(<span class="string">&quot;connection gracefully shutdown&quot;</span>);
Poll::Ready(<span class="prelude-val">Ok</span>(Dispatched::Shutdown))
} <span class="kw">else </span>{
Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_h2(err)))
};
}
};
<span class="kw">match </span><span class="self">self</span>.fut_ctx.take() {
<span class="comment">// If we were waiting on pending open
// continue where we left off.
</span><span class="prelude-val">Some</span>(f) =&gt; {
<span class="self">self</span>.poll_pipe(f, cx);
<span class="kw">continue</span>;
}
<span class="prelude-val">None </span>=&gt; (),
}
<span class="kw">match </span><span class="self">self</span>.req_rx.poll_recv(cx) {
Poll::Ready(<span class="prelude-val">Some</span>((req, cb))) =&gt; {
<span class="comment">// check that future hasn&#39;t been canceled already
</span><span class="kw">if </span>cb.is_canceled() {
<span class="macro">trace!</span>(<span class="string">&quot;request callback is canceled&quot;</span>);
<span class="kw">continue</span>;
}
<span class="kw">let </span>(head, body) = req.into_parts();
<span class="kw">let </span><span class="kw-2">mut </span>req = ::http::Request::from_parts(head, ());
<span class="kw">super</span>::strip_connection_headers(req.headers_mut(), <span class="bool-val">true</span>);
<span class="kw">if let </span><span class="prelude-val">Some</span>(len) = body.size_hint().exact() {
<span class="kw">if </span>len != <span class="number">0 </span>|| headers::method_has_defined_payload_semantics(req.method()) {
headers::set_content_length_if_missing(req.headers_mut(), len);
}
}
<span class="kw">let </span>is_connect = req.method() == Method::CONNECT;
<span class="kw">let </span>eos = body.is_end_stream();
<span class="kw">if </span>is_connect {
<span class="kw">if </span>headers::content_length_parse_all(req.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 connect request with non-zero body not supported&quot;</span>);
cb.send(<span class="prelude-val">Err</span>((
<span class="kw">crate</span>::Error::new_h2(h2::Reason::INTERNAL_ERROR.into()),
<span class="prelude-val">None</span>,
)));
<span class="kw">continue</span>;
}
}
<span class="kw">if let </span><span class="prelude-val">Some</span>(protocol) = req.extensions_mut().remove::&lt;Protocol&gt;() {
req.extensions_mut().insert(protocol.into_inner());
}
<span class="kw">let </span>(fut, body_tx) = <span class="kw">match </span><span class="self">self</span>.h2_tx.send_request(req, !is_connect &amp;&amp; eos) {
<span class="prelude-val">Ok</span>(ok) =&gt; ok,
<span class="prelude-val">Err</span>(err) =&gt; {
<span class="macro">debug!</span>(<span class="string">&quot;client send request error: {}&quot;</span>, err);
cb.send(<span class="prelude-val">Err</span>((<span class="kw">crate</span>::Error::new_h2(err), <span class="prelude-val">None</span>)));
<span class="kw">continue</span>;
}
};
<span class="kw">let </span>f = FutCtx {
is_connect,
eos,
fut,
body_tx,
body,
cb,
};
<span class="comment">// Check poll_ready() again.
// If the call to send_request() resulted in the new stream being pending open
// we have to wait for the open to complete before accepting new requests.
</span><span class="kw">match </span><span class="self">self</span>.h2_tx.poll_ready(cx) {
Poll::Pending =&gt; {
<span class="comment">// Save Context
</span><span class="self">self</span>.fut_ctx = <span class="prelude-val">Some</span>(f);
<span class="kw">return </span>Poll::Pending;
}
Poll::Ready(<span class="prelude-val">Ok</span>(())) =&gt; (),
Poll::Ready(<span class="prelude-val">Err</span>(err)) =&gt; {
f.cb.send(<span class="prelude-val">Err</span>((<span class="kw">crate</span>::Error::new_h2(err), <span class="prelude-val">None</span>)));
<span class="kw">continue</span>;
}
}
<span class="self">self</span>.poll_pipe(f, cx);
<span class="kw">continue</span>;
}
Poll::Ready(<span class="prelude-val">None</span>) =&gt; {
<span class="macro">trace!</span>(<span class="string">&quot;client::dispatch::Sender dropped&quot;</span>);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(Dispatched::Shutdown));
}
Poll::Pending =&gt; <span class="kw">match </span><span class="macro">ready!</span>(Pin::new(<span class="kw-2">&amp;mut </span><span class="self">self</span>.conn_eof).poll(cx)) {
<span class="prelude-val">Ok</span>(never) =&gt; <span class="kw">match </span>never {},
<span class="prelude-val">Err</span>(_conn_is_eof) =&gt; {
<span class="macro">trace!</span>(<span class="string">&quot;connection task is closed, closing dispatch task&quot;</span>);
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(Dispatched::Shutdown));
}
},
}
}
}
}
</code></pre></div>
</section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="hyper" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>