| <!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/tonic-0.6.2/src/codec/encode.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>encode.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="../../../tonic/index.html"><div class="logo-container"> |
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| </pre><pre class="rust"><code><span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span><span class="kw">use </span><span class="kw">super</span>::compression::{compress, CompressionEncoding, SingleMessageCompressionOverride}; |
| <span class="kw">use super</span>::{EncodeBuf, Encoder, HEADER_SIZE}; |
| <span class="kw">use crate</span>::{Code, Status}; |
| <span class="kw">use </span>bytes::{BufMut, Bytes, BytesMut}; |
| <span class="kw">use </span>futures_core::{Stream, TryStream}; |
| <span class="kw">use </span>futures_util::{ready, StreamExt, TryStreamExt}; |
| <span class="kw">use </span>http::HeaderMap; |
| <span class="kw">use </span>http_body::Body; |
| <span class="kw">use </span>pin_project::pin_project; |
| <span class="kw">use </span>std::{ |
| pin::Pin, |
| task::{Context, Poll}, |
| }; |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">const </span>BUFFER_SIZE: usize = <span class="number">8 </span>* <span class="number">1024</span>; |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>encode_server<T, U>( |
| encoder: T, |
| source: U, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] </span>compression_encoding: <span class="prelude-ty">Option</span><CompressionEncoding>, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] </span>compression_override: SingleMessageCompressionOverride, |
| ) -> EncodeBody<<span class="kw">impl </span>Stream<Item = <span class="prelude-ty">Result</span><Bytes, Status>>> |
| <span class="kw">where |
| </span>T: Encoder<Error = Status>, |
| U: Stream<Item = <span class="prelude-ty">Result</span><T::Item, Status>>, |
| { |
| <span class="kw">let </span>stream = encode( |
| encoder, |
| source, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span>compression_encoding, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span>compression_override, |
| ) |
| .into_stream(); |
| |
| EncodeBody::new_server(stream) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>encode_client<T, U>( |
| encoder: T, |
| source: U, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] </span>compression_encoding: <span class="prelude-ty">Option</span><CompressionEncoding>, |
| ) -> EncodeBody<<span class="kw">impl </span>Stream<Item = <span class="prelude-ty">Result</span><Bytes, Status>>> |
| <span class="kw">where |
| </span>T: Encoder<Error = Status>, |
| U: Stream<Item = T::Item>, |
| { |
| <span class="kw">let </span>stream = encode( |
| encoder, |
| source.map(<span class="prelude-val">Ok</span>), |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span>compression_encoding, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span>SingleMessageCompressionOverride::default(), |
| ) |
| .into_stream(); |
| EncodeBody::new_client(stream) |
| } |
| |
| <span class="kw">fn </span>encode<T, U>( |
| <span class="kw-2">mut </span>encoder: T, |
| source: U, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] </span>compression_encoding: <span class="prelude-ty">Option</span><CompressionEncoding>, |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] </span>compression_override: SingleMessageCompressionOverride, |
| ) -> <span class="kw">impl </span>TryStream<<span class="prelude-val">Ok </span>= Bytes, Error = Status> |
| <span class="kw">where |
| </span>T: Encoder<Error = Status>, |
| U: Stream<Item = <span class="prelude-ty">Result</span><T::Item, Status>>, |
| { |
| <span class="macro">async_stream::stream! </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::with_capacity(BUFFER_SIZE); |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span><span class="kw">let </span>(compression_enabled_for_stream, <span class="kw-2">mut </span>uncompression_buf) = <span class="kw">match </span>compression_encoding { |
| <span class="prelude-val">Some</span>(CompressionEncoding::Gzip) => (<span class="bool-val">true</span>, BytesMut::with_capacity(BUFFER_SIZE)), |
| <span class="prelude-val">None </span>=> (<span class="bool-val">false</span>, BytesMut::new()), |
| }; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span><span class="kw">let </span>compress_item = compression_enabled_for_stream && compression_override == SingleMessageCompressionOverride::Inherit; |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"compression"</span>))] |
| </span><span class="kw">let </span>compress_item = <span class="bool-val">false</span>; |
| |
| <span class="macro">futures_util::pin_mut!</span>(source); |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span>source.next().<span class="kw">await </span>{ |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(item)) => { |
| buf.reserve(HEADER_SIZE); |
| <span class="kw">unsafe </span>{ |
| buf.advance_mut(HEADER_SIZE); |
| } |
| |
| <span class="kw">if </span>compress_item { |
| <span class="attribute">#[cfg(feature = <span class="string">"compression"</span>)] |
| </span>{ |
| uncompression_buf.clear(); |
| |
| encoder.encode(item, <span class="kw-2">&mut </span>EncodeBuf::new(<span class="kw-2">&mut </span>uncompression_buf)) |
| .map_err(|err| Status::internal(<span class="macro">format!</span>(<span class="string">"Error encoding: {}"</span>, err)))<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>uncompressed_len = uncompression_buf.len(); |
| |
| compress( |
| compression_encoding.unwrap(), |
| <span class="kw-2">&mut </span>uncompression_buf, |
| <span class="kw-2">&mut </span>buf, |
| uncompressed_len, |
| ).map_err(|err| Status::internal(<span class="macro">format!</span>(<span class="string">"Error compressing: {}"</span>, err)))<span class="question-mark">?</span>; |
| } |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"compression"</span>))] |
| </span><span class="macro">unreachable!</span>(<span class="string">"compression disabled, should not take this branch"</span>); |
| } <span class="kw">else </span>{ |
| encoder.encode(item, <span class="kw-2">&mut </span>EncodeBuf::new(<span class="kw-2">&mut </span>buf)) |
| .map_err(|err| Status::internal(<span class="macro">format!</span>(<span class="string">"Error encoding: {}"</span>, err)))<span class="question-mark">?</span>; |
| } |
| |
| <span class="comment">// now that we know length, we can write the header |
| </span><span class="kw">let </span>len = buf.len() - HEADER_SIZE; |
| <span class="macro">assert!</span>(len <= std::u32::MAX <span class="kw">as </span>usize); |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = <span class="kw-2">&mut </span>buf[..HEADER_SIZE]; |
| buf.put_u8(compress_item <span class="kw">as </span>u8); |
| buf.put_u32(len <span class="kw">as </span>u32); |
| } |
| |
| <span class="kw">yield </span><span class="prelude-val">Ok</span>(buf.split_to(len + HEADER_SIZE).freeze()); |
| }, |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(status)) => <span class="kw">yield </span><span class="prelude-val">Err</span>(status), |
| <span class="prelude-val">None </span>=> <span class="kw">break</span>, |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">enum </span>Role { |
| Client, |
| Server, |
| } |
| |
| <span class="attribute">#[pin_project] |
| #[derive(Debug)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>EncodeBody<S> { |
| <span class="attribute">#[pin] |
| </span>inner: S, |
| error: <span class="prelude-ty">Option</span><Status>, |
| role: Role, |
| is_end_stream: bool, |
| } |
| |
| <span class="kw">impl</span><S> EncodeBody<S> |
| <span class="kw">where |
| </span>S: Stream<Item = <span class="prelude-ty">Result</span><Bytes, Status>>, |
| { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new_client(inner: S) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| inner, |
| error: <span class="prelude-val">None</span>, |
| role: Role::Client, |
| is_end_stream: <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new_server(inner: S) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| inner, |
| error: <span class="prelude-val">None</span>, |
| role: Role::Server, |
| is_end_stream: <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><S> Body <span class="kw">for </span>EncodeBody<S> |
| <span class="kw">where |
| </span>S: Stream<Item = <span class="prelude-ty">Result</span><Bytes, Status>>, |
| { |
| <span class="kw">type </span>Data = Bytes; |
| <span class="kw">type </span>Error = Status; |
| |
| <span class="kw">fn </span>is_end_stream(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.is_end_stream |
| } |
| |
| <span class="kw">fn </span>poll_data( |
| <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">Option</span><<span class="prelude-ty">Result</span><<span class="self">Self</span>::Data, <span class="self">Self</span>::Error>>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>self_proj = <span class="self">self</span>.project(); |
| <span class="kw">match </span><span class="macro">ready!</span>(self_proj.inner.try_poll_next_unpin(cx)) { |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(d)) => <span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(d)).into(), |
| <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(status)) => <span class="kw">match </span>self_proj.role { |
| Role::Client => <span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(status)).into(), |
| Role::Server => { |
| <span class="kw-2">*</span>self_proj.error = <span class="prelude-val">Some</span>(status); |
| <span class="prelude-val">None</span>.into() |
| } |
| }, |
| <span class="prelude-val">None </span>=> <span class="prelude-val">None</span>.into(), |
| } |
| } |
| |
| <span class="kw">fn </span>poll_trailers( |
| <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><<span class="prelude-ty">Option</span><HeaderMap>, Status>> { |
| <span class="kw">match </span><span class="self">self</span>.role { |
| Role::Client => Poll::Ready(<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>)), |
| Role::Server => { |
| <span class="kw">let </span>self_proj = <span class="self">self</span>.project(); |
| |
| <span class="kw">if </span><span class="kw-2">*</span>self_proj.is_end_stream { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>)); |
| } |
| |
| <span class="kw">let </span>status = <span class="kw">if let </span><span class="prelude-val">Some</span>(status) = self_proj.error.take() { |
| <span class="kw-2">*</span>self_proj.is_end_stream = <span class="bool-val">true</span>; |
| status |
| } <span class="kw">else </span>{ |
| Status::new(Code::Ok, <span class="string">""</span>) |
| }; |
| |
| Poll::Ready(<span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(status.to_header_map()<span class="question-mark">?</span>))) |
| } |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tonic" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
