| <!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/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.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>bytes::{Buf, Bytes}; |
| <span class="kw">use </span>h2::{Reason, RecvStream, SendStream}; |
| <span class="kw">use </span>http::header::{HeaderName, CONNECTION, TE, TRAILER, TRANSFER_ENCODING, UPGRADE}; |
| <span class="kw">use </span>http::HeaderMap; |
| <span class="kw">use </span>pin_project_lite::pin_project; |
| <span class="kw">use </span>std::error::Error <span class="kw">as </span>StdError; |
| <span class="kw">use </span>std::io::{<span class="self">self</span>, Cursor, IoSlice}; |
| <span class="kw">use </span>std::mem; |
| <span class="kw">use </span>std::task::Context; |
| <span class="kw">use </span>tokio::io::{AsyncRead, AsyncWrite, ReadBuf}; |
| <span class="kw">use </span>tracing::{debug, trace, warn}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::body::HttpBody; |
| <span class="kw">use </span><span class="kw">crate</span>::common::{task, Future, Pin, Poll}; |
| <span class="kw">use </span><span class="kw">crate</span>::proto::h2::ping::Recorder; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>ping; |
| |
| <span class="macro">cfg_client! </span>{ |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>client; |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use </span><span class="self">self</span>::client::ClientTask; |
| } |
| |
| <span class="macro">cfg_server! </span>{ |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">mod </span>server; |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">use </span><span class="self">self</span>::server::Server; |
| } |
| |
| <span class="doccomment">/// Default initial stream window size defined in HTTP2 spec. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const </span>SPEC_WINDOW_SIZE: u32 = <span class="number">65_535</span>; |
| |
| <span class="kw">fn </span>strip_connection_headers(headers: <span class="kw-2">&mut </span>HeaderMap, is_request: bool) { |
| <span class="comment">// List of connection headers from: |
| // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Connection |
| // |
| // TE headers are allowed in HTTP/2 requests as long as the value is "trailers", so they're |
| // tested separately. |
| </span><span class="kw">let </span>connection_headers = [ |
| HeaderName::from_lowercase(<span class="string">b"keep-alive"</span>).unwrap(), |
| HeaderName::from_lowercase(<span class="string">b"proxy-connection"</span>).unwrap(), |
| TRAILER, |
| TRANSFER_ENCODING, |
| UPGRADE, |
| ]; |
| |
| <span class="kw">for </span>header <span class="kw">in </span>connection_headers.iter() { |
| <span class="kw">if </span>headers.remove(header).is_some() { |
| <span class="macro">warn!</span>(<span class="string">"Connection header illegal in HTTP/2: {}"</span>, header.as_str()); |
| } |
| } |
| |
| <span class="kw">if </span>is_request { |
| <span class="kw">if </span>headers |
| .get(TE) |
| .map(|te_header| te_header != <span class="string">"trailers"</span>) |
| .unwrap_or(<span class="bool-val">false</span>) |
| { |
| <span class="macro">warn!</span>(<span class="string">"TE headers not set to \"trailers\" are illegal in HTTP/2 requests"</span>); |
| headers.remove(TE); |
| } |
| } <span class="kw">else if </span>headers.remove(TE).is_some() { |
| <span class="macro">warn!</span>(<span class="string">"TE headers illegal in HTTP/2 responses"</span>); |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(header) = headers.remove(CONNECTION) { |
| <span class="macro">warn!</span>( |
| <span class="string">"Connection header illegal in HTTP/2: {}"</span>, |
| CONNECTION.as_str() |
| ); |
| <span class="kw">let </span>header_contents = header.to_str().unwrap(); |
| |
| <span class="comment">// A `Connection` header may have a comma-separated list of names of other headers that |
| // are meant for only this specific connection. |
| // |
| // Iterate these names and remove them as headers. Connection-specific headers are |
| // forbidden in HTTP2, as that information has been moved into frame types of the h2 |
| // protocol. |
| </span><span class="kw">for </span>name <span class="kw">in </span>header_contents.split(<span class="string">','</span>) { |
| <span class="kw">let </span>name = name.trim(); |
| headers.remove(name); |
| } |
| } |
| } |
| |
| <span class="comment">// body adapters used by both Client and Server |
| |
| </span><span class="macro">pin_project! </span>{ |
| <span class="kw">struct </span>PipeToSendStream<S> |
| <span class="kw">where |
| </span>S: HttpBody, |
| { |
| body_tx: SendStream<SendBuf<S::Data>>, |
| data_done: bool, |
| <span class="attribute">#[pin] |
| </span>stream: S, |
| } |
| } |
| |
| <span class="kw">impl</span><S> PipeToSendStream<S> |
| <span class="kw">where |
| </span>S: HttpBody, |
| { |
| <span class="kw">fn </span>new(stream: S, tx: SendStream<SendBuf<S::Data>>) -> PipeToSendStream<S> { |
| PipeToSendStream { |
| body_tx: tx, |
| data_done: <span class="bool-val">false</span>, |
| stream, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><S> Future <span class="kw">for </span>PipeToSendStream<S> |
| <span class="kw">where |
| </span>S: HttpBody, |
| S::Error: Into<Box<<span class="kw">dyn </span>StdError + Send + Sync>>, |
| { |
| <span class="kw">type </span>Output = <span class="kw">crate</span>::Result<()>; |
| |
| <span class="kw">fn </span>poll(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <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">if </span>!<span class="kw-2">*</span>me.data_done { |
| <span class="comment">// we don't have the next chunk of data yet, so just reserve 1 byte to make |
| // sure there's some capacity available. h2 will handle the capacity management |
| // for the actual body chunk. |
| </span>me.body_tx.reserve_capacity(<span class="number">1</span>); |
| |
| <span class="kw">if </span>me.body_tx.capacity() == <span class="number">0 </span>{ |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span><span class="macro">ready!</span>(me.body_tx.poll_capacity(cx)) { |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(<span class="number">0</span>)) => {} |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(<span class="kw">_</span>)) => <span class="kw">break</span>, |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(e)) => { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_body_write(e))) |
| } |
| <span class="prelude-val">None </span>=> { |
| <span class="comment">// None means the stream is no longer in a |
| // streaming state, we either finished it |
| // somehow, or the remote reset us. |
| </span><span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_body_write( |
| <span class="string">"send stream capacity unexpectedly closed"</span>, |
| ))); |
| } |
| } |
| } |
| } <span class="kw">else if let </span>Poll::Ready(reason) = me |
| .body_tx |
| .poll_reset(cx) |
| .map_err(<span class="kw">crate</span>::Error::new_body_write)<span class="question-mark">? |
| </span>{ |
| <span class="macro">debug!</span>(<span class="string">"stream received RST_STREAM: {:?}"</span>, reason); |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_body_write(::h2::Error::from( |
| reason, |
| )))); |
| } |
| |
| <span class="kw">match </span><span class="macro">ready!</span>(me.stream.as_mut().poll_data(cx)) { |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(chunk)) => { |
| <span class="kw">let </span>is_eos = me.stream.is_end_stream(); |
| <span class="macro">trace!</span>( |
| <span class="string">"send body chunk: {} bytes, eos={}"</span>, |
| chunk.remaining(), |
| is_eos, |
| ); |
| |
| <span class="kw">let </span>buf = SendBuf::Buf(chunk); |
| me.body_tx |
| .send_data(buf, is_eos) |
| .map_err(<span class="kw">crate</span>::Error::new_body_write)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>is_eos { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())); |
| } |
| } |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(e)) => <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(me.body_tx.on_user_err(e))), |
| <span class="prelude-val">None </span>=> { |
| me.body_tx.reserve_capacity(<span class="number">0</span>); |
| <span class="kw">let </span>is_eos = me.stream.is_end_stream(); |
| <span class="kw">if </span>is_eos { |
| <span class="kw">return </span>Poll::Ready(me.body_tx.send_eos_frame()); |
| } <span class="kw">else </span>{ |
| <span class="kw-2">*</span>me.data_done = <span class="bool-val">true</span>; |
| <span class="comment">// loop again to poll_trailers |
| </span>} |
| } |
| } |
| } <span class="kw">else </span>{ |
| <span class="kw">if let </span>Poll::Ready(reason) = me |
| .body_tx |
| .poll_reset(cx) |
| .map_err(<span class="kw">crate</span>::Error::new_body_write)<span class="question-mark">? |
| </span>{ |
| <span class="macro">debug!</span>(<span class="string">"stream received RST_STREAM: {:?}"</span>, reason); |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(<span class="kw">crate</span>::Error::new_body_write(::h2::Error::from( |
| reason, |
| )))); |
| } |
| |
| <span class="kw">match </span><span class="macro">ready!</span>(me.stream.poll_trailers(cx)) { |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(trailers)) => { |
| me.body_tx |
| .send_trailers(trailers) |
| .map_err(<span class="kw">crate</span>::Error::new_body_write)<span class="question-mark">?</span>; |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())); |
| } |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) => { |
| <span class="comment">// There were no trailers, so send an empty DATA frame... |
| </span><span class="kw">return </span>Poll::Ready(me.body_tx.send_eos_frame()); |
| } |
| <span class="prelude-val">Err</span>(e) => <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(me.body_tx.on_user_err(e))), |
| } |
| } |
| } |
| } |
| } |
| |
| <span class="kw">trait </span>SendStreamExt { |
| <span class="kw">fn </span>on_user_err<E>(<span class="kw-2">&mut </span><span class="self">self</span>, err: E) -> <span class="kw">crate</span>::Error |
| <span class="kw">where |
| </span>E: Into<Box<<span class="kw">dyn </span>std::error::Error + Send + Sync>>; |
| <span class="kw">fn </span>send_eos_frame(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw">crate</span>::Result<()>; |
| } |
| |
| <span class="kw">impl</span><B: Buf> SendStreamExt <span class="kw">for </span>SendStream<SendBuf<B>> { |
| <span class="kw">fn </span>on_user_err<E>(<span class="kw-2">&mut </span><span class="self">self</span>, err: E) -> <span class="kw">crate</span>::Error |
| <span class="kw">where |
| </span>E: Into<Box<<span class="kw">dyn </span>std::error::Error + Send + Sync>>, |
| { |
| <span class="kw">let </span>err = <span class="kw">crate</span>::Error::new_user_body(err); |
| <span class="macro">debug!</span>(<span class="string">"send body user stream error: {}"</span>, err); |
| <span class="self">self</span>.send_reset(err.h2_reason()); |
| err |
| } |
| |
| <span class="kw">fn </span>send_eos_frame(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw">crate</span>::Result<()> { |
| <span class="macro">trace!</span>(<span class="string">"send body eos"</span>); |
| <span class="self">self</span>.send_data(SendBuf::None, <span class="bool-val">true</span>) |
| .map_err(<span class="kw">crate</span>::Error::new_body_write) |
| } |
| } |
| |
| <span class="attribute">#[repr(usize)] |
| </span><span class="kw">enum </span>SendBuf<B> { |
| Buf(B), |
| Cursor(Cursor<Box<[u8]>>), |
| <span class="prelude-val">None</span>, |
| } |
| |
| <span class="kw">impl</span><B: Buf> Buf <span class="kw">for </span>SendBuf<B> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>remaining(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| <span class="self">Self</span>::Buf(<span class="kw-2">ref </span>b) => b.remaining(), |
| <span class="self">Self</span>::Cursor(<span class="kw-2">ref </span>c) => Buf::remaining(c), |
| <span class="self">Self</span>::None => <span class="number">0</span>, |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>chunk(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[u8] { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| <span class="self">Self</span>::Buf(<span class="kw-2">ref </span>b) => b.chunk(), |
| <span class="self">Self</span>::Cursor(<span class="kw-2">ref </span>c) => c.chunk(), |
| <span class="self">Self</span>::None => <span class="kw-2">&</span>[], |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>advance(<span class="kw-2">&mut </span><span class="self">self</span>, cnt: usize) { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| <span class="self">Self</span>::Buf(<span class="kw-2">ref mut </span>b) => b.advance(cnt), |
| <span class="self">Self</span>::Cursor(<span class="kw-2">ref mut </span>c) => c.advance(cnt), |
| <span class="self">Self</span>::None => {} |
| } |
| } |
| |
| <span class="kw">fn </span>chunks_vectored<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="self">self</span>, dst: <span class="kw-2">&mut </span>[IoSlice<<span class="lifetime">'a</span>>]) -> usize { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| <span class="self">Self</span>::Buf(<span class="kw-2">ref </span>b) => b.chunks_vectored(dst), |
| <span class="self">Self</span>::Cursor(<span class="kw-2">ref </span>c) => c.chunks_vectored(dst), |
| <span class="self">Self</span>::None => <span class="number">0</span>, |
| } |
| } |
| } |
| |
| <span class="kw">struct </span>H2Upgraded<B> |
| <span class="kw">where |
| </span>B: Buf, |
| { |
| ping: Recorder, |
| send_stream: UpgradedSendStream<B>, |
| recv_stream: RecvStream, |
| buf: Bytes, |
| } |
| |
| <span class="kw">impl</span><B> AsyncRead <span class="kw">for </span>H2Upgraded<B> |
| <span class="kw">where |
| </span>B: Buf, |
| { |
| <span class="kw">fn </span>poll_read( |
| <span class="kw-2">mut </span><span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| read_buf: <span class="kw-2">&mut </span>ReadBuf<<span class="lifetime">'_</span>>, |
| ) -> Poll<<span class="prelude-ty">Result</span><(), io::Error>> { |
| <span class="kw">if </span><span class="self">self</span>.buf.is_empty() { |
| <span class="self">self</span>.buf = <span class="kw">loop </span>{ |
| <span class="kw">match </span><span class="macro">ready!</span>(<span class="self">self</span>.recv_stream.poll_data(cx)) { |
| <span class="prelude-val">None </span>=> <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())), |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(buf)) <span class="kw">if </span>buf.is_empty() && !<span class="self">self</span>.recv_stream.is_end_stream() => { |
| <span class="kw">continue |
| </span>} |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(buf)) => { |
| <span class="self">self</span>.ping.record_data(buf.len()); |
| <span class="kw">break </span>buf; |
| } |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(e)) => { |
| <span class="kw">return </span>Poll::Ready(<span class="kw">match </span>e.reason() { |
| <span class="prelude-val">Some</span>(Reason::NO_ERROR) | <span class="prelude-val">Some</span>(Reason::CANCEL) => <span class="prelude-val">Ok</span>(()), |
| <span class="prelude-val">Some</span>(Reason::STREAM_CLOSED) => { |
| <span class="prelude-val">Err</span>(io::Error::new(io::ErrorKind::BrokenPipe, e)) |
| } |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(h2_to_io_error(e)), |
| }) |
| } |
| } |
| }; |
| } |
| <span class="kw">let </span>cnt = std::cmp::min(<span class="self">self</span>.buf.len(), read_buf.remaining()); |
| read_buf.put_slice(<span class="kw-2">&</span><span class="self">self</span>.buf[..cnt]); |
| <span class="self">self</span>.buf.advance(cnt); |
| <span class="kw">let _ </span>= <span class="self">self</span>.recv_stream.flow_control().release_capacity(cnt); |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| } |
| |
| <span class="kw">impl</span><B> AsyncWrite <span class="kw">for </span>H2Upgraded<B> |
| <span class="kw">where |
| </span>B: Buf, |
| { |
| <span class="kw">fn </span>poll_write( |
| <span class="kw-2">mut </span><span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| buf: <span class="kw-2">&</span>[u8], |
| ) -> Poll<<span class="prelude-ty">Result</span><usize, io::Error>> { |
| <span class="kw">if </span>buf.is_empty() { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(<span class="number">0</span>)); |
| } |
| <span class="self">self</span>.send_stream.reserve_capacity(buf.len()); |
| |
| <span class="comment">// We ignore all errors returned by `poll_capacity` and `write`, as we |
| // will get the correct from `poll_reset` anyway. |
| </span><span class="kw">let </span>cnt = <span class="kw">match </span><span class="macro">ready!</span>(<span class="self">self</span>.send_stream.poll_capacity(cx)) { |
| <span class="prelude-val">None </span>=> <span class="prelude-val">Some</span>(<span class="number">0</span>), |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(cnt)) => <span class="self">self |
| </span>.send_stream |
| .write(<span class="kw-2">&</span>buf[..cnt], <span class="bool-val">false</span>) |
| .ok() |
| .map(|()| cnt), |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(<span class="kw">_</span>)) => <span class="prelude-val">None</span>, |
| }; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(cnt) = cnt { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(cnt)); |
| } |
| |
| Poll::Ready(<span class="prelude-val">Err</span>(h2_to_io_error( |
| <span class="kw">match </span><span class="macro">ready!</span>(<span class="self">self</span>.send_stream.poll_reset(cx)) { |
| <span class="prelude-val">Ok</span>(Reason::NO_ERROR) | <span class="prelude-val">Ok</span>(Reason::CANCEL) | <span class="prelude-val">Ok</span>(Reason::STREAM_CLOSED) => { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::ErrorKind::BrokenPipe.into())) |
| } |
| <span class="prelude-val">Ok</span>(reason) => reason.into(), |
| <span class="prelude-val">Err</span>(e) => e, |
| }, |
| ))) |
| } |
| |
| <span class="kw">fn </span>poll_flush(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, _cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><(), io::Error>> { |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| |
| <span class="kw">fn </span>poll_shutdown( |
| <span class="kw-2">mut </span><span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, |
| cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>, |
| ) -> Poll<<span class="prelude-ty">Result</span><(), io::Error>> { |
| <span class="kw">if </span><span class="self">self</span>.send_stream.write(<span class="kw-2">&</span>[], <span class="bool-val">true</span>).is_ok() { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| |
| Poll::Ready(<span class="prelude-val">Err</span>(h2_to_io_error( |
| <span class="kw">match </span><span class="macro">ready!</span>(<span class="self">self</span>.send_stream.poll_reset(cx)) { |
| <span class="prelude-val">Ok</span>(Reason::NO_ERROR) => { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(())) |
| } |
| <span class="prelude-val">Ok</span>(Reason::CANCEL) | <span class="prelude-val">Ok</span>(Reason::STREAM_CLOSED) => { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::ErrorKind::BrokenPipe.into())) |
| } |
| <span class="prelude-val">Ok</span>(reason) => reason.into(), |
| <span class="prelude-val">Err</span>(e) => e, |
| }, |
| ))) |
| } |
| } |
| |
| <span class="kw">fn </span>h2_to_io_error(e: h2::Error) -> io::Error { |
| <span class="kw">if </span>e.is_io() { |
| e.into_io().unwrap() |
| } <span class="kw">else </span>{ |
| io::Error::new(io::ErrorKind::Other, e) |
| } |
| } |
| |
| <span class="kw">struct </span>UpgradedSendStream<B>(SendStream<SendBuf<Neutered<B>>>); |
| |
| <span class="kw">impl</span><B> UpgradedSendStream<B> |
| <span class="kw">where |
| </span>B: Buf, |
| { |
| <span class="kw">unsafe fn </span>new(inner: SendStream<SendBuf<B>>) -> <span class="self">Self </span>{ |
| <span class="macro">assert_eq!</span>(mem::size_of::<B>(), mem::size_of::<Neutered<B>>()); |
| <span class="self">Self</span>(mem::transmute(inner)) |
| } |
| |
| <span class="kw">fn </span>reserve_capacity(<span class="kw-2">&mut </span><span class="self">self</span>, cnt: usize) { |
| <span class="kw">unsafe </span>{ <span class="self">self</span>.as_inner_unchecked().reserve_capacity(cnt) } |
| } |
| |
| <span class="kw">fn </span>poll_capacity(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Option</span><<span class="prelude-ty">Result</span><usize, h2::Error>>> { |
| <span class="kw">unsafe </span>{ <span class="self">self</span>.as_inner_unchecked().poll_capacity(cx) } |
| } |
| |
| <span class="kw">fn </span>poll_reset(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Result</span><h2::Reason, h2::Error>> { |
| <span class="kw">unsafe </span>{ <span class="self">self</span>.as_inner_unchecked().poll_reset(cx) } |
| } |
| |
| <span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&</span>[u8], end_of_stream: bool) -> <span class="prelude-ty">Result</span><(), io::Error> { |
| <span class="kw">let </span>send_buf = SendBuf::Cursor(Cursor::new(buf.into())); |
| <span class="kw">unsafe </span>{ |
| <span class="self">self</span>.as_inner_unchecked() |
| .send_data(send_buf, end_of_stream) |
| .map_err(h2_to_io_error) |
| } |
| } |
| |
| <span class="kw">unsafe fn </span>as_inner_unchecked(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>SendStream<SendBuf<B>> { |
| <span class="kw-2">&mut *</span>(<span class="kw-2">&mut </span><span class="self">self</span>.<span class="number">0 </span><span class="kw">as </span><span class="kw-2">*mut </span><span class="kw">_ as </span><span class="kw-2">*mut </span><span class="kw">_</span>) |
| } |
| } |
| |
| <span class="attribute">#[repr(transparent)] |
| </span><span class="kw">struct </span>Neutered<B> { |
| _inner: B, |
| impossible: Impossible, |
| } |
| |
| <span class="kw">enum </span>Impossible {} |
| |
| <span class="kw">unsafe impl</span><B> Send <span class="kw">for </span>Neutered<B> {} |
| |
| <span class="kw">impl</span><B> Buf <span class="kw">for </span>Neutered<B> { |
| <span class="kw">fn </span>remaining(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">match </span><span class="self">self</span>.impossible {} |
| } |
| |
| <span class="kw">fn </span>chunk(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[u8] { |
| <span class="kw">match </span><span class="self">self</span>.impossible {} |
| } |
| |
| <span class="kw">fn </span>advance(<span class="kw-2">&mut </span><span class="self">self</span>, _cnt: usize) { |
| <span class="kw">match </span><span class="self">self</span>.impossible {} |
| } |
| } |
| </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> |
