| <!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/h1/decode.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>decode.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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| <span id="523">523</span> |
| <span id="524">524</span> |
| <span id="525">525</span> |
| <span id="526">526</span> |
| <span id="527">527</span> |
| <span id="528">528</span> |
| <span id="529">529</span> |
| <span id="530">530</span> |
| <span id="531">531</span> |
| <span id="532">532</span> |
| <span id="533">533</span> |
| <span id="534">534</span> |
| <span id="535">535</span> |
| <span id="536">536</span> |
| <span id="537">537</span> |
| <span id="538">538</span> |
| <span id="539">539</span> |
| <span id="540">540</span> |
| <span id="541">541</span> |
| <span id="542">542</span> |
| <span id="543">543</span> |
| <span id="544">544</span> |
| <span id="545">545</span> |
| <span id="546">546</span> |
| <span id="547">547</span> |
| <span id="548">548</span> |
| <span id="549">549</span> |
| <span id="550">550</span> |
| <span id="551">551</span> |
| <span id="552">552</span> |
| <span id="553">553</span> |
| <span id="554">554</span> |
| <span id="555">555</span> |
| <span id="556">556</span> |
| <span id="557">557</span> |
| <span id="558">558</span> |
| <span id="559">559</span> |
| <span id="560">560</span> |
| <span id="561">561</span> |
| <span id="562">562</span> |
| <span id="563">563</span> |
| <span id="564">564</span> |
| <span id="565">565</span> |
| <span id="566">566</span> |
| <span id="567">567</span> |
| <span id="568">568</span> |
| <span id="569">569</span> |
| <span id="570">570</span> |
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| <span id="578">578</span> |
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| <span id="580">580</span> |
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| <span id="582">582</span> |
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| <span id="585">585</span> |
| <span id="586">586</span> |
| <span id="587">587</span> |
| <span id="588">588</span> |
| <span id="589">589</span> |
| <span id="590">590</span> |
| <span id="591">591</span> |
| <span id="592">592</span> |
| <span id="593">593</span> |
| <span id="594">594</span> |
| <span id="595">595</span> |
| <span id="596">596</span> |
| <span id="597">597</span> |
| <span id="598">598</span> |
| <span id="599">599</span> |
| <span id="600">600</span> |
| <span id="601">601</span> |
| <span id="602">602</span> |
| <span id="603">603</span> |
| <span id="604">604</span> |
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| <span id="607">607</span> |
| <span id="608">608</span> |
| <span id="609">609</span> |
| <span id="610">610</span> |
| <span id="611">611</span> |
| <span id="612">612</span> |
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| <span id="617">617</span> |
| <span id="618">618</span> |
| <span id="619">619</span> |
| <span id="620">620</span> |
| <span id="621">621</span> |
| <span id="622">622</span> |
| <span id="623">623</span> |
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| <span id="627">627</span> |
| <span id="628">628</span> |
| <span id="629">629</span> |
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| <span id="631">631</span> |
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| <span id="643">643</span> |
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| <span id="645">645</span> |
| <span id="646">646</span> |
| <span id="647">647</span> |
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| <span id="649">649</span> |
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| <span id="652">652</span> |
| <span id="653">653</span> |
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| <span id="655">655</span> |
| <span id="656">656</span> |
| <span id="657">657</span> |
| <span id="658">658</span> |
| <span id="659">659</span> |
| <span id="660">660</span> |
| <span id="661">661</span> |
| <span id="662">662</span> |
| <span id="663">663</span> |
| <span id="664">664</span> |
| <span id="665">665</span> |
| <span id="666">666</span> |
| <span id="667">667</span> |
| <span id="668">668</span> |
| <span id="669">669</span> |
| <span id="670">670</span> |
| <span id="671">671</span> |
| <span id="672">672</span> |
| <span id="673">673</span> |
| <span id="674">674</span> |
| <span id="675">675</span> |
| <span id="676">676</span> |
| <span id="677">677</span> |
| <span id="678">678</span> |
| <span id="679">679</span> |
| <span id="680">680</span> |
| <span id="681">681</span> |
| <span id="682">682</span> |
| <span id="683">683</span> |
| <span id="684">684</span> |
| <span id="685">685</span> |
| <span id="686">686</span> |
| <span id="687">687</span> |
| <span id="688">688</span> |
| <span id="689">689</span> |
| <span id="690">690</span> |
| <span id="691">691</span> |
| <span id="692">692</span> |
| <span id="693">693</span> |
| <span id="694">694</span> |
| <span id="695">695</span> |
| <span id="696">696</span> |
| <span id="697">697</span> |
| <span id="698">698</span> |
| <span id="699">699</span> |
| <span id="700">700</span> |
| <span id="701">701</span> |
| <span id="702">702</span> |
| <span id="703">703</span> |
| <span id="704">704</span> |
| <span id="705">705</span> |
| <span id="706">706</span> |
| <span id="707">707</span> |
| <span id="708">708</span> |
| <span id="709">709</span> |
| <span id="710">710</span> |
| <span id="711">711</span> |
| <span id="712">712</span> |
| <span id="713">713</span> |
| <span id="714">714</span> |
| <span id="715">715</span> |
| <span id="716">716</span> |
| <span id="717">717</span> |
| <span id="718">718</span> |
| <span id="719">719</span> |
| <span id="720">720</span> |
| <span id="721">721</span> |
| <span id="722">722</span> |
| <span id="723">723</span> |
| <span id="724">724</span> |
| <span id="725">725</span> |
| <span id="726">726</span> |
| <span id="727">727</span> |
| <span id="728">728</span> |
| <span id="729">729</span> |
| <span id="730">730</span> |
| <span id="731">731</span> |
| </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::fmt; |
| <span class="kw">use </span>std::io; |
| <span class="kw">use </span>std::usize; |
| |
| <span class="kw">use </span>bytes::Bytes; |
| <span class="kw">use </span>tracing::{debug, trace}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::common::{task, Poll}; |
| |
| <span class="kw">use </span><span class="kw">super</span>::io::MemRead; |
| <span class="kw">use </span><span class="kw">super</span>::DecodedLength; |
| |
| <span class="kw">use </span><span class="self">self</span>::Kind::{Chunked, Eof, Length}; |
| |
| <span class="doccomment">/// Decoders to handle different Transfer-Encodings. |
| /// |
| /// If a message body does not include a Transfer-Encoding, it *should* |
| /// include a Content-Length header. |
| </span><span class="attribute">#[derive(Clone, PartialEq)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>Decoder { |
| kind: Kind, |
| } |
| |
| <span class="attribute">#[derive(Debug, Clone, Copy, PartialEq)] |
| </span><span class="kw">enum </span>Kind { |
| <span class="doccomment">/// A Reader used when a Content-Length header is passed with a positive integer. |
| </span>Length(u64), |
| <span class="doccomment">/// A Reader used when Transfer-Encoding is `chunked`. |
| </span>Chunked(ChunkedState, u64), |
| <span class="doccomment">/// A Reader used for responses that don't indicate a length or chunked. |
| /// |
| /// The bool tracks when EOF is seen on the transport. |
| /// |
| /// Note: This should only used for `Response`s. It is illegal for a |
| /// `Request` to be made with both `Content-Length` and |
| /// `Transfer-Encoding: chunked` missing, as explained from the spec: |
| /// |
| /// > If a Transfer-Encoding header field is present in a response and |
| /// > the chunked transfer coding is not the final encoding, the |
| /// > message body length is determined by reading the connection until |
| /// > it is closed by the server. If a Transfer-Encoding header field |
| /// > is present in a request and the chunked transfer coding is not |
| /// > the final encoding, the message body length cannot be determined |
| /// > reliably; the server MUST respond with the 400 (Bad Request) |
| /// > status code and then close the connection. |
| </span>Eof(bool), |
| } |
| |
| <span class="attribute">#[derive(Debug, PartialEq, Clone, Copy)] |
| </span><span class="kw">enum </span>ChunkedState { |
| Size, |
| SizeLws, |
| Extension, |
| SizeLf, |
| Body, |
| BodyCr, |
| BodyLf, |
| Trailer, |
| TrailerLf, |
| EndCr, |
| EndLf, |
| End, |
| } |
| |
| <span class="kw">impl </span>Decoder { |
| <span class="comment">// constructors |
| |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>length(x: u64) -> Decoder { |
| Decoder { |
| kind: Kind::Length(x), |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>chunked() -> Decoder { |
| Decoder { |
| kind: Kind::Chunked(ChunkedState::Size, <span class="number">0</span>), |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>eof() -> Decoder { |
| Decoder { |
| kind: Kind::Eof(<span class="bool-val">false</span>), |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>new(len: DecodedLength) -> <span class="self">Self </span>{ |
| <span class="kw">match </span>len { |
| DecodedLength::CHUNKED => Decoder::chunked(), |
| DecodedLength::CLOSE_DELIMITED => Decoder::eof(), |
| length => Decoder::length(length.danger_len()), |
| } |
| } |
| |
| <span class="comment">// methods |
| |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>is_eof(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="macro">matches!</span>(<span class="self">self</span>.kind, Length(<span class="number">0</span>) | Chunked(ChunkedState::End, <span class="kw">_</span>) | Eof(<span class="bool-val">true</span>)) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>decode<R: MemRead>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| body: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><Bytes, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"decode; state={:?}"</span>, <span class="self">self</span>.kind); |
| <span class="kw">match </span><span class="self">self</span>.kind { |
| Length(<span class="kw-2">ref mut </span>remaining) => { |
| <span class="kw">if </span><span class="kw-2">*</span>remaining == <span class="number">0 </span>{ |
| Poll::Ready(<span class="prelude-val">Ok</span>(Bytes::new())) |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>to_read = <span class="kw-2">*</span>remaining <span class="kw">as </span>usize; |
| <span class="kw">let </span>buf = <span class="macro">ready!</span>(body.read_mem(cx, to_read))<span class="question-mark">?</span>; |
| <span class="kw">let </span>num = buf.as_ref().len() <span class="kw">as </span>u64; |
| <span class="kw">if </span>num > <span class="kw-2">*</span>remaining { |
| <span class="kw-2">*</span>remaining = <span class="number">0</span>; |
| } <span class="kw">else if </span>num == <span class="number">0 </span>{ |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::UnexpectedEof, |
| IncompleteBody, |
| ))); |
| } <span class="kw">else </span>{ |
| <span class="kw-2">*</span>remaining -= num; |
| } |
| Poll::Ready(<span class="prelude-val">Ok</span>(buf)) |
| } |
| } |
| Chunked(<span class="kw-2">ref mut </span>state, <span class="kw-2">ref mut </span>size) => { |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = <span class="prelude-val">None</span>; |
| <span class="comment">// advances the chunked state |
| </span><span class="kw-2">*</span>state = <span class="macro">ready!</span>(state.step(cx, body, size, <span class="kw-2">&mut </span>buf))<span class="question-mark">?</span>; |
| <span class="kw">if </span><span class="kw-2">*</span>state == ChunkedState::End { |
| <span class="macro">trace!</span>(<span class="string">"end of chunked"</span>); |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(Bytes::new())); |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(buf) = buf { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(buf)); |
| } |
| } |
| } |
| Eof(<span class="kw-2">ref mut </span>is_eof) => { |
| <span class="kw">if </span><span class="kw-2">*</span>is_eof { |
| Poll::Ready(<span class="prelude-val">Ok</span>(Bytes::new())) |
| } <span class="kw">else </span>{ |
| <span class="comment">// 8192 chosen because its about 2 packets, there probably |
| // won't be that much available, so don't have MemReaders |
| // allocate buffers to big |
| </span>body.read_mem(cx, <span class="number">8192</span>).map_ok(|slice| { |
| <span class="kw-2">*</span>is_eof = slice.is_empty(); |
| slice |
| }) |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">async fn </span>decode_fut<R: MemRead>(<span class="kw-2">&mut </span><span class="self">self</span>, body: <span class="kw-2">&mut </span>R) -> <span class="prelude-ty">Result</span><Bytes, io::Error> { |
| futures_util::future::poll_fn(<span class="kw">move </span>|cx| <span class="self">self</span>.decode(cx, body)).<span class="kw">await |
| </span>} |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Decoder { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| fmt::Debug::fmt(<span class="kw-2">&</span><span class="self">self</span>.kind, f) |
| } |
| } |
| |
| <span class="macro">macro_rules! </span>byte ( |
| (<span class="macro-nonterminal">$rdr</span>:ident, <span class="macro-nonterminal">$cx</span>:expr) => ({ |
| <span class="kw">let </span>buf = <span class="macro">ready!</span>(<span class="macro-nonterminal">$rdr</span>.read_mem(<span class="macro-nonterminal">$cx</span>, <span class="number">1</span>))<span class="question-mark">?</span>; |
| <span class="kw">if </span>!buf.is_empty() { |
| buf[<span class="number">0</span>] |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new(io::ErrorKind::UnexpectedEof, |
| <span class="string">"unexpected EOF during chunk size line"</span>))); |
| } |
| }) |
| ); |
| |
| <span class="kw">impl </span>ChunkedState { |
| <span class="kw">fn </span>step<R: MemRead>( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| body: <span class="kw-2">&mut </span>R, |
| size: <span class="kw-2">&mut </span>u64, |
| buf: <span class="kw-2">&mut </span><span class="prelude-ty">Option</span><Bytes>, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="kw">use </span><span class="self">self</span>::ChunkedState::<span class="kw-2">*</span>; |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Size => ChunkedState::read_size(cx, body, size), |
| SizeLws => ChunkedState::read_size_lws(cx, body), |
| Extension => ChunkedState::read_extension(cx, body), |
| SizeLf => ChunkedState::read_size_lf(cx, body, <span class="kw-2">*</span>size), |
| Body => ChunkedState::read_body(cx, body, size, buf), |
| BodyCr => ChunkedState::read_body_cr(cx, body), |
| BodyLf => ChunkedState::read_body_lf(cx, body), |
| Trailer => ChunkedState::read_trailer(cx, body), |
| TrailerLf => ChunkedState::read_trailer_lf(cx, body), |
| EndCr => ChunkedState::read_end_cr(cx, body), |
| EndLf => ChunkedState::read_end_lf(cx, body), |
| End => Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::End)), |
| } |
| } |
| <span class="kw">fn </span>read_size<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| size: <span class="kw-2">&mut </span>u64, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"Read chunk hex size"</span>); |
| |
| <span class="macro">macro_rules! </span>or_overflow { |
| (<span class="macro-nonterminal">$e</span>:expr) => ( |
| <span class="kw">match </span><span class="macro-nonterminal">$e </span>{ |
| <span class="prelude-val">Some</span>(val) => val, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidData, |
| <span class="string">"invalid chunk size: overflow"</span>, |
| ))), |
| } |
| ) |
| } |
| |
| <span class="kw">let </span>radix = <span class="number">16</span>; |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| b @ <span class="string">b'0'</span>..=<span class="string">b'9' </span>=> { |
| <span class="kw-2">*</span>size = <span class="macro">or_overflow!</span>(size.checked_mul(radix)); |
| <span class="kw-2">*</span>size = <span class="macro">or_overflow!</span>(size.checked_add((b - <span class="string">b'0'</span>) <span class="kw">as </span>u64)); |
| } |
| b @ <span class="string">b'a'</span>..=<span class="string">b'f' </span>=> { |
| <span class="kw-2">*</span>size = <span class="macro">or_overflow!</span>(size.checked_mul(radix)); |
| <span class="kw-2">*</span>size = <span class="macro">or_overflow!</span>(size.checked_add((b + <span class="number">10 </span>- <span class="string">b'a'</span>) <span class="kw">as </span>u64)); |
| } |
| b @ <span class="string">b'A'</span>..=<span class="string">b'F' </span>=> { |
| <span class="kw-2">*</span>size = <span class="macro">or_overflow!</span>(size.checked_mul(radix)); |
| <span class="kw-2">*</span>size = <span class="macro">or_overflow!</span>(size.checked_add((b + <span class="number">10 </span>- <span class="string">b'A'</span>) <span class="kw">as </span>u64)); |
| } |
| <span class="string">b'\t' </span>| <span class="string">b' ' </span>=> <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::SizeLws)), |
| <span class="string">b';' </span>=> <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Extension)), |
| <span class="string">b'\r' </span>=> <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::SizeLf)), |
| <span class="kw">_ </span>=> { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid chunk size line: Invalid Size"</span>, |
| ))); |
| } |
| } |
| Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Size)) |
| } |
| <span class="kw">fn </span>read_size_lws<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"read_size_lws"</span>); |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="comment">// LWS can follow the chunk size, but no more digits can come |
| </span><span class="string">b'\t' </span>| <span class="string">b' ' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::SizeLws)), |
| <span class="string">b';' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Extension)), |
| <span class="string">b'\r' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::SizeLf)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid chunk size linear white space"</span>, |
| ))), |
| } |
| } |
| <span class="kw">fn </span>read_extension<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"read_extension"</span>); |
| <span class="comment">// We don't care about extensions really at all. Just ignore them. |
| // They "end" at the next CRLF. |
| // |
| // However, some implementations may not check for the CR, so to save |
| // them from themselves, we reject extensions containing plain LF as |
| // well. |
| </span><span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\r' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::SizeLf)), |
| <span class="string">b'\n' </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidData, |
| <span class="string">"invalid chunk extension contains newline"</span>, |
| ))), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Extension)), <span class="comment">// no supported extensions |
| </span>} |
| } |
| <span class="kw">fn </span>read_size_lf<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| size: u64, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"Chunk size is {:?}"</span>, size); |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\n' </span>=> { |
| <span class="kw">if </span>size == <span class="number">0 </span>{ |
| Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::EndCr)) |
| } <span class="kw">else </span>{ |
| <span class="macro">debug!</span>(<span class="string">"incoming chunked header: {0:#X} ({0} bytes)"</span>, size); |
| Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Body)) |
| } |
| } |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid chunk size LF"</span>, |
| ))), |
| } |
| } |
| |
| <span class="kw">fn </span>read_body<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| rem: <span class="kw-2">&mut </span>u64, |
| buf: <span class="kw-2">&mut </span><span class="prelude-ty">Option</span><Bytes>, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"Chunked read, remaining={:?}"</span>, rem); |
| |
| <span class="comment">// cap remaining bytes at the max capacity of usize |
| </span><span class="kw">let </span>rem_cap = <span class="kw">match </span><span class="kw-2">*</span>rem { |
| r <span class="kw">if </span>r > usize::MAX <span class="kw">as </span>u64 => usize::MAX, |
| r => r <span class="kw">as </span>usize, |
| }; |
| |
| <span class="kw">let </span>to_read = rem_cap; |
| <span class="kw">let </span>slice = <span class="macro">ready!</span>(rdr.read_mem(cx, to_read))<span class="question-mark">?</span>; |
| <span class="kw">let </span>count = slice.len(); |
| |
| <span class="kw">if </span>count == <span class="number">0 </span>{ |
| <span class="kw-2">*</span>rem = <span class="number">0</span>; |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::UnexpectedEof, |
| IncompleteBody, |
| ))); |
| } |
| <span class="kw-2">*</span>buf = <span class="prelude-val">Some</span>(slice); |
| <span class="kw-2">*</span>rem -= count <span class="kw">as </span>u64; |
| |
| <span class="kw">if </span><span class="kw-2">*</span>rem > <span class="number">0 </span>{ |
| Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Body)) |
| } <span class="kw">else </span>{ |
| Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::BodyCr)) |
| } |
| } |
| <span class="kw">fn </span>read_body_cr<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\r' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::BodyLf)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid chunk body CR"</span>, |
| ))), |
| } |
| } |
| <span class="kw">fn </span>read_body_lf<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\n' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Size)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid chunk body LF"</span>, |
| ))), |
| } |
| } |
| |
| <span class="kw">fn </span>read_trailer<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="macro">trace!</span>(<span class="string">"read_trailer"</span>); |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\r' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::TrailerLf)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Trailer)), |
| } |
| } |
| <span class="kw">fn </span>read_trailer_lf<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\n' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::EndCr)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid trailer end LF"</span>, |
| ))), |
| } |
| } |
| |
| <span class="kw">fn </span>read_end_cr<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\r' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::EndLf)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::Trailer)), |
| } |
| } |
| <span class="kw">fn </span>read_end_lf<R: MemRead>( |
| cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, |
| rdr: <span class="kw-2">&mut </span>R, |
| ) -> Poll<<span class="prelude-ty">Result</span><ChunkedState, io::Error>> { |
| <span class="kw">match </span><span class="macro">byte!</span>(rdr, cx) { |
| <span class="string">b'\n' </span>=> Poll::Ready(<span class="prelude-val">Ok</span>(ChunkedState::End)), |
| <span class="kw">_ </span>=> Poll::Ready(<span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidInput, |
| <span class="string">"Invalid chunk end LF"</span>, |
| ))), |
| } |
| } |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>IncompleteBody; |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>IncompleteBody { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"end of file before message length reached"</span>) |
| } |
| } |
| |
| <span class="kw">impl </span>StdError <span class="kw">for </span>IncompleteBody {} |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span>std::pin::Pin; |
| <span class="kw">use </span>std::time::Duration; |
| <span class="kw">use </span>tokio::io::{AsyncRead, ReadBuf}; |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> MemRead <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>[u8] { |
| <span class="kw">fn </span>read_mem(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, len: usize) -> Poll<io::Result<Bytes>> { |
| <span class="kw">let </span>n = std::cmp::min(len, <span class="self">self</span>.len()); |
| <span class="kw">if </span>n > <span class="number">0 </span>{ |
| <span class="kw">let </span>(a, b) = <span class="self">self</span>.split_at(n); |
| <span class="kw">let </span>buf = Bytes::copy_from_slice(a); |
| <span class="kw-2">*</span><span class="self">self </span>= b; |
| Poll::Ready(<span class="prelude-val">Ok</span>(buf)) |
| } <span class="kw">else </span>{ |
| Poll::Ready(<span class="prelude-val">Ok</span>(Bytes::new())) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> MemRead <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>(<span class="kw">dyn </span>AsyncRead + Unpin) { |
| <span class="kw">fn </span>read_mem(<span class="kw-2">&mut </span><span class="self">self</span>, cx: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, len: usize) -> Poll<io::Result<Bytes>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>v = <span class="macro">vec!</span>[<span class="number">0</span>; len]; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = ReadBuf::new(<span class="kw-2">&mut </span>v); |
| <span class="macro">ready!</span>(Pin::new(<span class="self">self</span>).poll_read(cx, <span class="kw-2">&mut </span>buf)<span class="question-mark">?</span>); |
| Poll::Ready(<span class="prelude-val">Ok</span>(Bytes::copy_from_slice(<span class="kw-2">&</span>buf.filled()))) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"nightly"</span>)] |
| </span><span class="kw">impl </span>MemRead <span class="kw">for </span>Bytes { |
| <span class="kw">fn </span>read_mem(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&mut </span>task::Context<<span class="lifetime">'_</span>>, len: usize) -> Poll<io::Result<Bytes>> { |
| <span class="kw">let </span>n = std::cmp::min(len, <span class="self">self</span>.len()); |
| <span class="kw">let </span>ret = <span class="self">self</span>.split_to(n); |
| Poll::Ready(<span class="prelude-val">Ok</span>(ret)) |
| } |
| } |
| |
| <span class="comment">/* |
| use std::io; |
| use std::io::Write; |
| use super::Decoder; |
| use super::ChunkedState; |
| use futures::{Async, Poll}; |
| use bytes::{BytesMut, Bytes}; |
| use crate::mock::AsyncIo; |
| */ |
| |
| </span><span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_chunk_size() { |
| <span class="kw">use </span>std::io::ErrorKind::{InvalidData, InvalidInput, UnexpectedEof}; |
| |
| <span class="kw">async fn </span>read(s: <span class="kw-2">&</span>str) -> u64 { |
| <span class="kw">let </span><span class="kw-2">mut </span>state = ChunkedState::Size; |
| <span class="kw">let </span>rdr = <span class="kw-2">&mut </span>s.as_bytes(); |
| <span class="kw">let </span><span class="kw-2">mut </span>size = <span class="number">0</span>; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>result = |
| futures_util::future::poll_fn(|cx| state.step(cx, rdr, <span class="kw-2">&mut </span>size, <span class="kw-2">&mut </span><span class="prelude-val">None</span>)) |
| .<span class="kw">await</span>; |
| <span class="kw">let </span>desc = <span class="macro">format!</span>(<span class="string">"read_size failed for {:?}"</span>, s); |
| state = result.expect(desc.as_str()); |
| <span class="kw">if </span>state == ChunkedState::Body || state == ChunkedState::EndCr { |
| <span class="kw">break</span>; |
| } |
| } |
| size |
| } |
| |
| <span class="kw">async fn </span>read_err(s: <span class="kw-2">&</span>str, expected_err: io::ErrorKind) { |
| <span class="kw">let </span><span class="kw-2">mut </span>state = ChunkedState::Size; |
| <span class="kw">let </span>rdr = <span class="kw-2">&mut </span>s.as_bytes(); |
| <span class="kw">let </span><span class="kw-2">mut </span>size = <span class="number">0</span>; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>result = |
| futures_util::future::poll_fn(|cx| state.step(cx, rdr, <span class="kw-2">&mut </span>size, <span class="kw-2">&mut </span><span class="prelude-val">None</span>)) |
| .<span class="kw">await</span>; |
| state = <span class="kw">match </span>result { |
| <span class="prelude-val">Ok</span>(s) => s, |
| <span class="prelude-val">Err</span>(e) => { |
| <span class="macro">assert!</span>( |
| expected_err == e.kind(), |
| <span class="string">"Reading {:?}, expected {:?}, but got {:?}"</span>, |
| s, |
| expected_err, |
| e.kind() |
| ); |
| <span class="kw">return</span>; |
| } |
| }; |
| <span class="kw">if </span>state == ChunkedState::Body || state == ChunkedState::End { |
| <span class="macro">panic!</span>(<span class="string">"Was Ok. Expected Err for {:?}"</span>, s); |
| } |
| } |
| } |
| |
| <span class="macro">assert_eq!</span>(<span class="number">1</span>, read(<span class="string">"1\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">1</span>, read(<span class="string">"01\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, read(<span class="string">"0\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, read(<span class="string">"00\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">10</span>, read(<span class="string">"A\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">10</span>, read(<span class="string">"a\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">255</span>, read(<span class="string">"Ff\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">255</span>, read(<span class="string">"Ff \r\n"</span>).<span class="kw">await</span>); |
| <span class="comment">// Missing LF or CRLF |
| </span>read_err(<span class="string">"F\rF"</span>, InvalidInput).<span class="kw">await</span>; |
| read_err(<span class="string">"F"</span>, UnexpectedEof).<span class="kw">await</span>; |
| <span class="comment">// Invalid hex digit |
| </span>read_err(<span class="string">"X\r\n"</span>, InvalidInput).<span class="kw">await</span>; |
| read_err(<span class="string">"1X\r\n"</span>, InvalidInput).<span class="kw">await</span>; |
| read_err(<span class="string">"-\r\n"</span>, InvalidInput).<span class="kw">await</span>; |
| read_err(<span class="string">"-1\r\n"</span>, InvalidInput).<span class="kw">await</span>; |
| <span class="comment">// Acceptable (if not fully valid) extensions do not influence the size |
| </span><span class="macro">assert_eq!</span>(<span class="number">1</span>, read(<span class="string">"1;extension\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">10</span>, read(<span class="string">"a;ext name=value\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">1</span>, read(<span class="string">"1;extension;extension2\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">1</span>, read(<span class="string">"1;;; ;\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">2</span>, read(<span class="string">"2; extension...\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">3</span>, read(<span class="string">"3 ; extension=123\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">3</span>, read(<span class="string">"3 ;\r\n"</span>).<span class="kw">await</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">3</span>, read(<span class="string">"3 ; \r\n"</span>).<span class="kw">await</span>); |
| <span class="comment">// Invalid extensions cause an error |
| </span>read_err(<span class="string">"1 invalid extension\r\n"</span>, InvalidInput).<span class="kw">await</span>; |
| read_err(<span class="string">"1 A\r\n"</span>, InvalidInput).<span class="kw">await</span>; |
| read_err(<span class="string">"1;no CRLF"</span>, UnexpectedEof).<span class="kw">await</span>; |
| read_err(<span class="string">"1;reject\nnewlines\r\n"</span>, InvalidData).<span class="kw">await</span>; |
| <span class="comment">// Overflow |
| </span>read_err(<span class="string">"f0000000000000003\r\n"</span>, InvalidData).<span class="kw">await</span>; |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_sized_early_eof() { |
| <span class="kw">let </span><span class="kw-2">mut </span>bytes = <span class="kw-2">&</span><span class="string">b"foo bar"</span>[..]; |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = Decoder::length(<span class="number">10</span>); |
| <span class="macro">assert_eq!</span>(decoder.decode_fut(<span class="kw-2">&mut </span>bytes).<span class="kw">await</span>.unwrap().len(), <span class="number">7</span>); |
| <span class="kw">let </span>e = decoder.decode_fut(<span class="kw-2">&mut </span>bytes).<span class="kw">await</span>.unwrap_err(); |
| <span class="macro">assert_eq!</span>(e.kind(), io::ErrorKind::UnexpectedEof); |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_chunked_early_eof() { |
| <span class="kw">let </span><span class="kw-2">mut </span>bytes = <span class="kw-2">&</span><span class="string">b"\ |
| 9\r\n\ |
| foo bar\ |
| "</span>[..]; |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = Decoder::chunked(); |
| <span class="macro">assert_eq!</span>(decoder.decode_fut(<span class="kw-2">&mut </span>bytes).<span class="kw">await</span>.unwrap().len(), <span class="number">7</span>); |
| <span class="kw">let </span>e = decoder.decode_fut(<span class="kw-2">&mut </span>bytes).<span class="kw">await</span>.unwrap_err(); |
| <span class="macro">assert_eq!</span>(e.kind(), io::ErrorKind::UnexpectedEof); |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_chunked_single_read() { |
| <span class="kw">let </span><span class="kw-2">mut </span>mock_buf = <span class="kw-2">&</span><span class="string">b"10\r\n1234567890abcdef\r\n0\r\n"</span>[..]; |
| <span class="kw">let </span>buf = Decoder::chunked() |
| .decode_fut(<span class="kw-2">&mut </span>mock_buf) |
| .<span class="kw">await |
| </span>.expect(<span class="string">"decode"</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">16</span>, buf.len()); |
| <span class="kw">let </span>result = String::from_utf8(buf.as_ref().to_vec()).expect(<span class="string">"decode String"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"1234567890abcdef"</span>, <span class="kw-2">&</span>result); |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_chunked_trailer_with_missing_lf() { |
| <span class="kw">let </span><span class="kw-2">mut </span>mock_buf = <span class="kw-2">&</span><span class="string">b"10\r\n1234567890abcdef\r\n0\r\nbad\r\r\n"</span>[..]; |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = Decoder::chunked(); |
| decoder.decode_fut(<span class="kw-2">&mut </span>mock_buf).<span class="kw">await</span>.expect(<span class="string">"decode"</span>); |
| <span class="kw">let </span>e = decoder.decode_fut(<span class="kw-2">&mut </span>mock_buf).<span class="kw">await</span>.unwrap_err(); |
| <span class="macro">assert_eq!</span>(e.kind(), io::ErrorKind::InvalidInput); |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_chunked_after_eof() { |
| <span class="kw">let </span><span class="kw-2">mut </span>mock_buf = <span class="kw-2">&</span><span class="string">b"10\r\n1234567890abcdef\r\n0\r\n\r\n"</span>[..]; |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = Decoder::chunked(); |
| |
| <span class="comment">// normal read |
| </span><span class="kw">let </span>buf = decoder.decode_fut(<span class="kw-2">&mut </span>mock_buf).<span class="kw">await</span>.unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="number">16</span>, buf.len()); |
| <span class="kw">let </span>result = String::from_utf8(buf.as_ref().to_vec()).expect(<span class="string">"decode String"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"1234567890abcdef"</span>, <span class="kw-2">&</span>result); |
| |
| <span class="comment">// eof read |
| </span><span class="kw">let </span>buf = decoder.decode_fut(<span class="kw-2">&mut </span>mock_buf).<span class="kw">await</span>.expect(<span class="string">"decode"</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, buf.len()); |
| |
| <span class="comment">// ensure read after eof also returns eof |
| </span><span class="kw">let </span>buf = decoder.decode_fut(<span class="kw-2">&mut </span>mock_buf).<span class="kw">await</span>.expect(<span class="string">"decode"</span>); |
| <span class="macro">assert_eq!</span>(<span class="number">0</span>, buf.len()); |
| } |
| |
| <span class="comment">// perform an async read using a custom buffer size and causing a blocking |
| // read at the specified byte |
| </span><span class="kw">async fn </span>read_async(<span class="kw-2">mut </span>decoder: Decoder, content: <span class="kw-2">&</span>[u8], block_at: usize) -> String { |
| <span class="kw">let </span><span class="kw-2">mut </span>outs = Vec::new(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>ins = <span class="kw">if </span>block_at == <span class="number">0 </span>{ |
| tokio_test::io::Builder::new() |
| .wait(Duration::from_millis(<span class="number">10</span>)) |
| .read(content) |
| .build() |
| } <span class="kw">else </span>{ |
| tokio_test::io::Builder::new() |
| .read(<span class="kw-2">&</span>content[..block_at]) |
| .wait(Duration::from_millis(<span class="number">10</span>)) |
| .read(<span class="kw-2">&</span>content[block_at..]) |
| .build() |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>ins = <span class="kw-2">&mut </span>ins <span class="kw">as </span><span class="kw-2">&mut </span>(<span class="kw">dyn </span>AsyncRead + Unpin); |
| |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>buf = decoder |
| .decode_fut(<span class="kw-2">&mut </span>ins) |
| .<span class="kw">await |
| </span>.expect(<span class="string">"unexpected decode error"</span>); |
| <span class="kw">if </span>buf.is_empty() { |
| <span class="kw">break</span>; <span class="comment">// eof |
| </span>} |
| outs.extend(buf.as_ref()); |
| } |
| |
| String::from_utf8(outs).expect(<span class="string">"decode String"</span>) |
| } |
| |
| <span class="comment">// iterate over the different ways that this async read could go. |
| // tests blocking a read at each byte along the content - The shotgun approach |
| </span><span class="kw">async fn </span>all_async_cases(content: <span class="kw-2">&</span>str, expected: <span class="kw-2">&</span>str, decoder: Decoder) { |
| <span class="kw">let </span>content_len = content.len(); |
| <span class="kw">for </span>block_at <span class="kw">in </span><span class="number">0</span>..content_len { |
| <span class="kw">let </span>actual = read_async(decoder.clone(), content.as_bytes(), block_at).<span class="kw">await</span>; |
| <span class="macro">assert_eq!</span>(expected, <span class="kw-2">&</span>actual) <span class="comment">//, "Failed async. Blocking at {}", block_at); |
| </span>} |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_length_async() { |
| <span class="kw">let </span>content = <span class="string">"foobar"</span>; |
| all_async_cases(content, content, Decoder::length(content.len() <span class="kw">as </span>u64)).<span class="kw">await</span>; |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_chunked_async() { |
| <span class="kw">let </span>content = <span class="string">"3\r\nfoo\r\n3\r\nbar\r\n0\r\n\r\n"</span>; |
| <span class="kw">let </span>expected = <span class="string">"foobar"</span>; |
| all_async_cases(content, expected, Decoder::chunked()).<span class="kw">await</span>; |
| } |
| |
| <span class="attribute">#[tokio::test] |
| </span><span class="kw">async fn </span>test_read_eof_async() { |
| <span class="kw">let </span>content = <span class="string">"foobar"</span>; |
| all_async_cases(content, content, Decoder::eof()).<span class="kw">await</span>; |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"nightly"</span>)] |
| #[bench] |
| </span><span class="kw">fn </span>bench_decode_chunked_1kb(b: <span class="kw-2">&mut </span>test::Bencher) { |
| <span class="kw">let </span>rt = new_runtime(); |
| |
| <span class="kw">const </span>LEN: usize = <span class="number">1024</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>vec = Vec::new(); |
| vec.extend(<span class="macro">format!</span>(<span class="string">"{:x}\r\n"</span>, LEN).as_bytes()); |
| vec.extend(<span class="kw-2">&</span>[<span class="number">0</span>; LEN][..]); |
| vec.extend(<span class="string">b"\r\n"</span>); |
| <span class="kw">let </span>content = Bytes::from(vec); |
| |
| b.bytes = LEN <span class="kw">as </span>u64; |
| |
| b.iter(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = Decoder::chunked(); |
| rt.block_on(<span class="kw">async </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>raw = content.clone(); |
| <span class="kw">let </span>chunk = decoder.decode_fut(<span class="kw-2">&mut </span>raw).<span class="kw">await</span>.unwrap(); |
| <span class="macro">assert_eq!</span>(chunk.len(), LEN); |
| }); |
| }); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"nightly"</span>)] |
| #[bench] |
| </span><span class="kw">fn </span>bench_decode_length_1kb(b: <span class="kw-2">&mut </span>test::Bencher) { |
| <span class="kw">let </span>rt = new_runtime(); |
| |
| <span class="kw">const </span>LEN: usize = <span class="number">1024</span>; |
| <span class="kw">let </span>content = Bytes::from(<span class="kw-2">&</span>[<span class="number">0</span>; LEN][..]); |
| b.bytes = LEN <span class="kw">as </span>u64; |
| |
| b.iter(|| { |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = Decoder::length(LEN <span class="kw">as </span>u64); |
| rt.block_on(<span class="kw">async </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>raw = content.clone(); |
| <span class="kw">let </span>chunk = decoder.decode_fut(<span class="kw-2">&mut </span>raw).<span class="kw">await</span>.unwrap(); |
| <span class="macro">assert_eq!</span>(chunk.len(), LEN); |
| }); |
| }); |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"nightly"</span>)] |
| </span><span class="kw">fn </span>new_runtime() -> tokio::runtime::Runtime { |
| tokio::runtime::Builder::new_current_thread() |
| .enable_all() |
| .build() |
| .expect(<span class="string">"rt build"</span>) |
| } |
| } |
| </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> |
