| <!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/h2-0.3.19/src/hpack/decoder.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>decoder.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="../../../h2/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="../../../h2/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> |
| <span id="571">571</span> |
| <span id="572">572</span> |
| <span id="573">573</span> |
| <span id="574">574</span> |
| <span id="575">575</span> |
| <span id="576">576</span> |
| <span id="577">577</span> |
| <span id="578">578</span> |
| <span id="579">579</span> |
| <span id="580">580</span> |
| <span id="581">581</span> |
| <span id="582">582</span> |
| <span id="583">583</span> |
| <span id="584">584</span> |
| <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> |
| <span id="605">605</span> |
| <span id="606">606</span> |
| <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> |
| <span id="613">613</span> |
| <span id="614">614</span> |
| <span id="615">615</span> |
| <span id="616">616</span> |
| <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> |
| <span id="624">624</span> |
| <span id="625">625</span> |
| <span id="626">626</span> |
| <span id="627">627</span> |
| <span id="628">628</span> |
| <span id="629">629</span> |
| <span id="630">630</span> |
| <span id="631">631</span> |
| <span id="632">632</span> |
| <span id="633">633</span> |
| <span id="634">634</span> |
| <span id="635">635</span> |
| <span id="636">636</span> |
| <span id="637">637</span> |
| <span id="638">638</span> |
| <span id="639">639</span> |
| <span id="640">640</span> |
| <span id="641">641</span> |
| <span id="642">642</span> |
| <span id="643">643</span> |
| <span id="644">644</span> |
| <span id="645">645</span> |
| <span id="646">646</span> |
| <span id="647">647</span> |
| <span id="648">648</span> |
| <span id="649">649</span> |
| <span id="650">650</span> |
| <span id="651">651</span> |
| <span id="652">652</span> |
| <span id="653">653</span> |
| <span id="654">654</span> |
| <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> |
| <span id="732">732</span> |
| <span id="733">733</span> |
| <span id="734">734</span> |
| <span id="735">735</span> |
| <span id="736">736</span> |
| <span id="737">737</span> |
| <span id="738">738</span> |
| <span id="739">739</span> |
| <span id="740">740</span> |
| <span id="741">741</span> |
| <span id="742">742</span> |
| <span id="743">743</span> |
| <span id="744">744</span> |
| <span id="745">745</span> |
| <span id="746">746</span> |
| <span id="747">747</span> |
| <span id="748">748</span> |
| <span id="749">749</span> |
| <span id="750">750</span> |
| <span id="751">751</span> |
| <span id="752">752</span> |
| <span id="753">753</span> |
| <span id="754">754</span> |
| <span id="755">755</span> |
| <span id="756">756</span> |
| <span id="757">757</span> |
| <span id="758">758</span> |
| <span id="759">759</span> |
| <span id="760">760</span> |
| <span id="761">761</span> |
| <span id="762">762</span> |
| <span id="763">763</span> |
| <span id="764">764</span> |
| <span id="765">765</span> |
| <span id="766">766</span> |
| <span id="767">767</span> |
| <span id="768">768</span> |
| <span id="769">769</span> |
| <span id="770">770</span> |
| <span id="771">771</span> |
| <span id="772">772</span> |
| <span id="773">773</span> |
| <span id="774">774</span> |
| <span id="775">775</span> |
| <span id="776">776</span> |
| <span id="777">777</span> |
| <span id="778">778</span> |
| <span id="779">779</span> |
| <span id="780">780</span> |
| <span id="781">781</span> |
| <span id="782">782</span> |
| <span id="783">783</span> |
| <span id="784">784</span> |
| <span id="785">785</span> |
| <span id="786">786</span> |
| <span id="787">787</span> |
| <span id="788">788</span> |
| <span id="789">789</span> |
| <span id="790">790</span> |
| <span id="791">791</span> |
| <span id="792">792</span> |
| <span id="793">793</span> |
| <span id="794">794</span> |
| <span id="795">795</span> |
| <span id="796">796</span> |
| <span id="797">797</span> |
| <span id="798">798</span> |
| <span id="799">799</span> |
| <span id="800">800</span> |
| <span id="801">801</span> |
| <span id="802">802</span> |
| <span id="803">803</span> |
| <span id="804">804</span> |
| <span id="805">805</span> |
| <span id="806">806</span> |
| <span id="807">807</span> |
| <span id="808">808</span> |
| <span id="809">809</span> |
| <span id="810">810</span> |
| <span id="811">811</span> |
| <span id="812">812</span> |
| <span id="813">813</span> |
| <span id="814">814</span> |
| <span id="815">815</span> |
| <span id="816">816</span> |
| <span id="817">817</span> |
| <span id="818">818</span> |
| <span id="819">819</span> |
| <span id="820">820</span> |
| <span id="821">821</span> |
| <span id="822">822</span> |
| <span id="823">823</span> |
| <span id="824">824</span> |
| <span id="825">825</span> |
| <span id="826">826</span> |
| <span id="827">827</span> |
| <span id="828">828</span> |
| <span id="829">829</span> |
| <span id="830">830</span> |
| <span id="831">831</span> |
| <span id="832">832</span> |
| <span id="833">833</span> |
| <span id="834">834</span> |
| <span id="835">835</span> |
| <span id="836">836</span> |
| <span id="837">837</span> |
| <span id="838">838</span> |
| <span id="839">839</span> |
| <span id="840">840</span> |
| <span id="841">841</span> |
| <span id="842">842</span> |
| <span id="843">843</span> |
| <span id="844">844</span> |
| <span id="845">845</span> |
| <span id="846">846</span> |
| <span id="847">847</span> |
| <span id="848">848</span> |
| <span id="849">849</span> |
| <span id="850">850</span> |
| <span id="851">851</span> |
| <span id="852">852</span> |
| <span id="853">853</span> |
| <span id="854">854</span> |
| <span id="855">855</span> |
| <span id="856">856</span> |
| <span id="857">857</span> |
| <span id="858">858</span> |
| <span id="859">859</span> |
| <span id="860">860</span> |
| <span id="861">861</span> |
| <span id="862">862</span> |
| <span id="863">863</span> |
| <span id="864">864</span> |
| <span id="865">865</span> |
| <span id="866">866</span> |
| <span id="867">867</span> |
| <span id="868">868</span> |
| <span id="869">869</span> |
| <span id="870">870</span> |
| <span id="871">871</span> |
| <span id="872">872</span> |
| <span id="873">873</span> |
| <span id="874">874</span> |
| <span id="875">875</span> |
| <span id="876">876</span> |
| <span id="877">877</span> |
| <span id="878">878</span> |
| <span id="879">879</span> |
| <span id="880">880</span> |
| <span id="881">881</span> |
| <span id="882">882</span> |
| <span id="883">883</span> |
| <span id="884">884</span> |
| <span id="885">885</span> |
| <span id="886">886</span> |
| <span id="887">887</span> |
| <span id="888">888</span> |
| <span id="889">889</span> |
| <span id="890">890</span> |
| <span id="891">891</span> |
| <span id="892">892</span> |
| <span id="893">893</span> |
| <span id="894">894</span> |
| <span id="895">895</span> |
| <span id="896">896</span> |
| <span id="897">897</span> |
| <span id="898">898</span> |
| <span id="899">899</span> |
| <span id="900">900</span> |
| <span id="901">901</span> |
| <span id="902">902</span> |
| <span id="903">903</span> |
| <span id="904">904</span> |
| <span id="905">905</span> |
| <span id="906">906</span> |
| <span id="907">907</span> |
| <span id="908">908</span> |
| <span id="909">909</span> |
| <span id="910">910</span> |
| <span id="911">911</span> |
| <span id="912">912</span> |
| <span id="913">913</span> |
| <span id="914">914</span> |
| <span id="915">915</span> |
| <span id="916">916</span> |
| <span id="917">917</span> |
| <span id="918">918</span> |
| <span id="919">919</span> |
| <span id="920">920</span> |
| <span id="921">921</span> |
| <span id="922">922</span> |
| <span id="923">923</span> |
| <span id="924">924</span> |
| <span id="925">925</span> |
| <span id="926">926</span> |
| <span id="927">927</span> |
| <span id="928">928</span> |
| <span id="929">929</span> |
| <span id="930">930</span> |
| <span id="931">931</span> |
| <span id="932">932</span> |
| <span id="933">933</span> |
| <span id="934">934</span> |
| <span id="935">935</span> |
| <span id="936">936</span> |
| <span id="937">937</span> |
| </pre><pre class="rust"><code><span class="kw">use super</span>::{header::BytesStr, huffman, Header}; |
| <span class="kw">use </span><span class="kw">crate</span>::frame; |
| |
| <span class="kw">use </span>bytes::{Buf, Bytes, BytesMut}; |
| <span class="kw">use </span>http::header; |
| <span class="kw">use </span>http::method::{<span class="self">self</span>, Method}; |
| <span class="kw">use </span>http::status::{<span class="self">self</span>, StatusCode}; |
| |
| <span class="kw">use </span>std::cmp; |
| <span class="kw">use </span>std::collections::VecDeque; |
| <span class="kw">use </span>std::io::Cursor; |
| <span class="kw">use </span>std::str::Utf8Error; |
| |
| <span class="doccomment">/// Decodes headers using HPACK |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>Decoder { |
| <span class="comment">// Protocol indicated that the max table size will update |
| </span>max_size_update: <span class="prelude-ty">Option</span><usize>, |
| last_max_update: usize, |
| table: Table, |
| buffer: BytesMut, |
| } |
| |
| <span class="doccomment">/// Represents all errors that can be encountered while performing the decoding |
| /// of an HPACK header set. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone, PartialEq, Eq)] |
| </span><span class="kw">pub enum </span>DecoderError { |
| InvalidRepresentation, |
| InvalidIntegerPrefix, |
| InvalidTableIndex, |
| InvalidHuffmanCode, |
| InvalidUtf8, |
| InvalidStatusCode, |
| InvalidPseudoheader, |
| InvalidMaxDynamicSize, |
| IntegerOverflow, |
| NeedMore(NeedMore), |
| } |
| |
| <span class="attribute">#[derive(Debug, Copy, Clone, PartialEq, Eq)] |
| </span><span class="kw">pub enum </span>NeedMore { |
| UnexpectedEndOfStream, |
| IntegerUnderflow, |
| StringUnderflow, |
| } |
| |
| <span class="kw">enum </span>Representation { |
| <span class="doccomment">/// Indexed header field representation |
| /// |
| /// An indexed header field representation identifies an entry in either the |
| /// static table or the dynamic table (see Section 2.3). |
| /// |
| /// # Header encoding |
| /// |
| /// ```text |
| /// 0 1 2 3 4 5 6 7 |
| /// +---+---+---+---+---+---+---+---+ |
| /// | 1 | Index (7+) | |
| /// +---+---------------------------+ |
| /// ``` |
| </span>Indexed, |
| |
| <span class="doccomment">/// Literal Header Field with Incremental Indexing |
| /// |
| /// A literal header field with incremental indexing representation results |
| /// in appending a header field to the decoded header list and inserting it |
| /// as a new entry into the dynamic table. |
| /// |
| /// # Header encoding |
| /// |
| /// ```text |
| /// 0 1 2 3 4 5 6 7 |
| /// +---+---+---+---+---+---+---+---+ |
| /// | 0 | 1 | Index (6+) | |
| /// +---+---+-----------------------+ |
| /// | H | Value Length (7+) | |
| /// +---+---------------------------+ |
| /// | Value String (Length octets) | |
| /// +-------------------------------+ |
| /// ``` |
| </span>LiteralWithIndexing, |
| |
| <span class="doccomment">/// Literal Header Field without Indexing |
| /// |
| /// A literal header field without indexing representation results in |
| /// appending a header field to the decoded header list without altering the |
| /// dynamic table. |
| /// |
| /// # Header encoding |
| /// |
| /// ```text |
| /// 0 1 2 3 4 5 6 7 |
| /// +---+---+---+---+---+---+---+---+ |
| /// | 0 | 0 | 0 | 0 | Index (4+) | |
| /// +---+---+-----------------------+ |
| /// | H | Value Length (7+) | |
| /// +---+---------------------------+ |
| /// | Value String (Length octets) | |
| /// +-------------------------------+ |
| /// ``` |
| </span>LiteralWithoutIndexing, |
| |
| <span class="doccomment">/// Literal Header Field Never Indexed |
| /// |
| /// A literal header field never-indexed representation results in appending |
| /// a header field to the decoded header list without altering the dynamic |
| /// table. Intermediaries MUST use the same representation for encoding this |
| /// header field. |
| /// |
| /// ```text |
| /// 0 1 2 3 4 5 6 7 |
| /// +---+---+---+---+---+---+---+---+ |
| /// | 0 | 0 | 0 | 1 | Index (4+) | |
| /// +---+---+-----------------------+ |
| /// | H | Value Length (7+) | |
| /// +---+---------------------------+ |
| /// | Value String (Length octets) | |
| /// +-------------------------------+ |
| /// ``` |
| </span>LiteralNeverIndexed, |
| |
| <span class="doccomment">/// Dynamic Table Size Update |
| /// |
| /// A dynamic table size update signals a change to the size of the dynamic |
| /// table. |
| /// |
| /// # Header encoding |
| /// |
| /// ```text |
| /// 0 1 2 3 4 5 6 7 |
| /// +---+---+---+---+---+---+---+---+ |
| /// | 0 | 0 | 1 | Max size (5+) | |
| /// +---+---------------------------+ |
| /// ``` |
| </span>SizeUpdate, |
| } |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>Table { |
| entries: VecDeque<Header>, |
| size: usize, |
| max_size: usize, |
| } |
| |
| <span class="kw">struct </span>StringMarker { |
| offset: usize, |
| len: usize, |
| string: <span class="prelude-ty">Option</span><Bytes>, |
| } |
| |
| <span class="comment">// ===== impl Decoder ===== |
| |
| </span><span class="kw">impl </span>Decoder { |
| <span class="doccomment">/// Creates a new `Decoder` with all settings set to default values. |
| </span><span class="kw">pub fn </span>new(size: usize) -> Decoder { |
| Decoder { |
| max_size_update: <span class="prelude-val">None</span>, |
| last_max_update: size, |
| table: Table::new(size), |
| buffer: BytesMut::with_capacity(<span class="number">4096</span>), |
| } |
| } |
| |
| <span class="doccomment">/// Queues a potential size update |
| </span><span class="attribute">#[allow(dead_code)] |
| </span><span class="kw">pub fn </span>queue_size_update(<span class="kw-2">&mut </span><span class="self">self</span>, size: usize) { |
| <span class="kw">let </span>size = <span class="kw">match </span><span class="self">self</span>.max_size_update { |
| <span class="prelude-val">Some</span>(v) => cmp::max(v, size), |
| <span class="prelude-val">None </span>=> size, |
| }; |
| |
| <span class="self">self</span>.max_size_update = <span class="prelude-val">Some</span>(size); |
| } |
| |
| <span class="doccomment">/// Decodes the headers found in the given buffer. |
| </span><span class="kw">pub fn </span>decode<F>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| src: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>, |
| <span class="kw-2">mut </span>f: F, |
| ) -> <span class="prelude-ty">Result</span><(), DecoderError> |
| <span class="kw">where |
| </span>F: FnMut(Header), |
| { |
| <span class="kw">use </span><span class="self">self</span>::Representation::<span class="kw-2">*</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>can_resize = <span class="bool-val">true</span>; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(size) = <span class="self">self</span>.max_size_update.take() { |
| <span class="self">self</span>.last_max_update = size; |
| } |
| |
| <span class="kw">let </span>span = <span class="macro">tracing::trace_span!</span>(<span class="string">"hpack::decode"</span>); |
| <span class="kw">let </span>_e = span.enter(); |
| |
| <span class="macro">tracing::trace!</span>(<span class="string">"decode"</span>); |
| |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(ty) = peek_u8(src) { |
| <span class="comment">// At this point we are always at the beginning of the next block |
| // within the HPACK data. The type of the block can always be |
| // determined from the first byte. |
| </span><span class="kw">match </span>Representation::load(ty)<span class="question-mark">? </span>{ |
| Indexed => { |
| <span class="macro">tracing::trace!</span>(rem = src.remaining(), kind = %<span class="string">"Indexed"</span>); |
| can_resize = <span class="bool-val">false</span>; |
| <span class="kw">let </span>entry = <span class="self">self</span>.decode_indexed(src)<span class="question-mark">?</span>; |
| consume(src); |
| f(entry); |
| } |
| LiteralWithIndexing => { |
| <span class="macro">tracing::trace!</span>(rem = src.remaining(), kind = %<span class="string">"LiteralWithIndexing"</span>); |
| can_resize = <span class="bool-val">false</span>; |
| <span class="kw">let </span>entry = <span class="self">self</span>.decode_literal(src, <span class="bool-val">true</span>)<span class="question-mark">?</span>; |
| |
| <span class="comment">// Insert the header into the table |
| </span><span class="self">self</span>.table.insert(entry.clone()); |
| consume(src); |
| |
| f(entry); |
| } |
| LiteralWithoutIndexing => { |
| <span class="macro">tracing::trace!</span>(rem = src.remaining(), kind = %<span class="string">"LiteralWithoutIndexing"</span>); |
| can_resize = <span class="bool-val">false</span>; |
| <span class="kw">let </span>entry = <span class="self">self</span>.decode_literal(src, <span class="bool-val">false</span>)<span class="question-mark">?</span>; |
| consume(src); |
| f(entry); |
| } |
| LiteralNeverIndexed => { |
| <span class="macro">tracing::trace!</span>(rem = src.remaining(), kind = %<span class="string">"LiteralNeverIndexed"</span>); |
| can_resize = <span class="bool-val">false</span>; |
| <span class="kw">let </span>entry = <span class="self">self</span>.decode_literal(src, <span class="bool-val">false</span>)<span class="question-mark">?</span>; |
| consume(src); |
| |
| <span class="comment">// TODO: Track that this should never be indexed |
| |
| </span>f(entry); |
| } |
| SizeUpdate => { |
| <span class="macro">tracing::trace!</span>(rem = src.remaining(), kind = %<span class="string">"SizeUpdate"</span>); |
| <span class="kw">if </span>!can_resize { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::InvalidMaxDynamicSize); |
| } |
| |
| <span class="comment">// Handle the dynamic table size update |
| </span><span class="self">self</span>.process_size_update(src)<span class="question-mark">?</span>; |
| consume(src); |
| } |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>process_size_update(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>) -> <span class="prelude-ty">Result</span><(), DecoderError> { |
| <span class="kw">let </span>new_size = decode_int(buf, <span class="number">5</span>)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>new_size > <span class="self">self</span>.last_max_update { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::InvalidMaxDynamicSize); |
| } |
| |
| <span class="macro">tracing::debug!</span>( |
| from = <span class="self">self</span>.table.size(), |
| to = new_size, |
| <span class="string">"Decoder changed max table size" |
| </span>); |
| |
| <span class="self">self</span>.table.set_max_size(new_size); |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>decode_indexed(<span class="kw-2">&</span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>) -> <span class="prelude-ty">Result</span><Header, DecoderError> { |
| <span class="kw">let </span>index = decode_int(buf, <span class="number">7</span>)<span class="question-mark">?</span>; |
| <span class="self">self</span>.table.get(index) |
| } |
| |
| <span class="kw">fn </span>decode_literal( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>, |
| index: bool, |
| ) -> <span class="prelude-ty">Result</span><Header, DecoderError> { |
| <span class="kw">let </span>prefix = <span class="kw">if </span>index { <span class="number">6 </span>} <span class="kw">else </span>{ <span class="number">4 </span>}; |
| |
| <span class="comment">// Extract the table index for the name, or 0 if not indexed |
| </span><span class="kw">let </span>table_idx = decode_int(buf, prefix)<span class="question-mark">?</span>; |
| |
| <span class="comment">// First, read the header name |
| </span><span class="kw">if </span>table_idx == <span class="number">0 </span>{ |
| <span class="kw">let </span>old_pos = buf.position(); |
| <span class="kw">let </span>name_marker = <span class="self">self</span>.try_decode_string(buf)<span class="question-mark">?</span>; |
| <span class="kw">let </span>value_marker = <span class="self">self</span>.try_decode_string(buf)<span class="question-mark">?</span>; |
| buf.set_position(old_pos); |
| <span class="comment">// Read the name as a literal |
| </span><span class="kw">let </span>name = name_marker.consume(buf); |
| <span class="kw">let </span>value = value_marker.consume(buf); |
| Header::new(name, value) |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>e = <span class="self">self</span>.table.get(table_idx)<span class="question-mark">?</span>; |
| <span class="kw">let </span>value = <span class="self">self</span>.decode_string(buf)<span class="question-mark">?</span>; |
| |
| e.name().into_entry(value) |
| } |
| } |
| |
| <span class="kw">fn </span>try_decode_string( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>, |
| ) -> <span class="prelude-ty">Result</span><StringMarker, DecoderError> { |
| <span class="kw">let </span>old_pos = buf.position(); |
| <span class="kw">const </span>HUFF_FLAG: u8 = <span class="number">0b1000_0000</span>; |
| |
| <span class="comment">// The first bit in the first byte contains the huffman encoded flag. |
| </span><span class="kw">let </span>huff = <span class="kw">match </span>peek_u8(buf) { |
| <span class="prelude-val">Some</span>(hdr) => (hdr & HUFF_FLAG) == HUFF_FLAG, |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::NeedMore(NeedMore::UnexpectedEndOfStream)), |
| }; |
| |
| <span class="comment">// Decode the string length using 7 bit prefix |
| </span><span class="kw">let </span>len = decode_int(buf, <span class="number">7</span>)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>len > buf.remaining() { |
| <span class="macro">tracing::trace!</span>(len, remaining = buf.remaining(), <span class="string">"decode_string underflow"</span>,); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::NeedMore(NeedMore::StringUnderflow)); |
| } |
| |
| <span class="kw">let </span>offset = (buf.position() - old_pos) <span class="kw">as </span>usize; |
| <span class="kw">if </span>huff { |
| <span class="kw">let </span>ret = { |
| <span class="kw">let </span>raw = <span class="kw-2">&</span>buf.chunk()[..len]; |
| huffman::decode(raw, <span class="kw-2">&mut </span><span class="self">self</span>.buffer).map(|buf| StringMarker { |
| offset, |
| len, |
| string: <span class="prelude-val">Some</span>(BytesMut::freeze(buf)), |
| }) |
| }; |
| |
| buf.advance(len); |
| ret |
| } <span class="kw">else </span>{ |
| buf.advance(len); |
| <span class="prelude-val">Ok</span>(StringMarker { |
| offset, |
| len, |
| string: <span class="prelude-val">None</span>, |
| }) |
| } |
| } |
| |
| <span class="kw">fn </span>decode_string(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>) -> <span class="prelude-ty">Result</span><Bytes, DecoderError> { |
| <span class="kw">let </span>old_pos = buf.position(); |
| <span class="kw">let </span>marker = <span class="self">self</span>.try_decode_string(buf)<span class="question-mark">?</span>; |
| buf.set_position(old_pos); |
| <span class="prelude-val">Ok</span>(marker.consume(buf)) |
| } |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>Decoder { |
| <span class="kw">fn </span>default() -> Decoder { |
| Decoder::new(<span class="number">4096</span>) |
| } |
| } |
| |
| <span class="comment">// ===== impl Representation ===== |
| |
| </span><span class="kw">impl </span>Representation { |
| <span class="kw">pub fn </span>load(byte: u8) -> <span class="prelude-ty">Result</span><Representation, DecoderError> { |
| <span class="kw">const </span>INDEXED: u8 = <span class="number">0b1000_0000</span>; |
| <span class="kw">const </span>LITERAL_WITH_INDEXING: u8 = <span class="number">0b0100_0000</span>; |
| <span class="kw">const </span>LITERAL_WITHOUT_INDEXING: u8 = <span class="number">0b1111_0000</span>; |
| <span class="kw">const </span>LITERAL_NEVER_INDEXED: u8 = <span class="number">0b0001_0000</span>; |
| <span class="kw">const </span>SIZE_UPDATE_MASK: u8 = <span class="number">0b1110_0000</span>; |
| <span class="kw">const </span>SIZE_UPDATE: u8 = <span class="number">0b0010_0000</span>; |
| |
| <span class="comment">// TODO: What did I even write here? |
| |
| </span><span class="kw">if </span>byte & INDEXED == INDEXED { |
| <span class="prelude-val">Ok</span>(Representation::Indexed) |
| } <span class="kw">else if </span>byte & LITERAL_WITH_INDEXING == LITERAL_WITH_INDEXING { |
| <span class="prelude-val">Ok</span>(Representation::LiteralWithIndexing) |
| } <span class="kw">else if </span>byte & LITERAL_WITHOUT_INDEXING == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(Representation::LiteralWithoutIndexing) |
| } <span class="kw">else if </span>byte & LITERAL_WITHOUT_INDEXING == LITERAL_NEVER_INDEXED { |
| <span class="prelude-val">Ok</span>(Representation::LiteralNeverIndexed) |
| } <span class="kw">else if </span>byte & SIZE_UPDATE_MASK == SIZE_UPDATE { |
| <span class="prelude-val">Ok</span>(Representation::SizeUpdate) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(DecoderError::InvalidRepresentation) |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>decode_int<B: Buf>(buf: <span class="kw-2">&mut </span>B, prefix_size: u8) -> <span class="prelude-ty">Result</span><usize, DecoderError> { |
| <span class="comment">// The octet limit is chosen such that the maximum allowed *value* can |
| // never overflow an unsigned 32-bit integer. The maximum value of any |
| // integer that can be encoded with 5 octets is ~2^28 |
| </span><span class="kw">const </span>MAX_BYTES: usize = <span class="number">5</span>; |
| <span class="kw">const </span>VARINT_MASK: u8 = <span class="number">0b0111_1111</span>; |
| <span class="kw">const </span>VARINT_FLAG: u8 = <span class="number">0b1000_0000</span>; |
| |
| <span class="kw">if </span>prefix_size < <span class="number">1 </span>|| prefix_size > <span class="number">8 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::InvalidIntegerPrefix); |
| } |
| |
| <span class="kw">if </span>!buf.has_remaining() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::NeedMore(NeedMore::IntegerUnderflow)); |
| } |
| |
| <span class="kw">let </span>mask = <span class="kw">if </span>prefix_size == <span class="number">8 </span>{ |
| <span class="number">0xFF |
| </span>} <span class="kw">else </span>{ |
| (<span class="number">1u8 </span><< prefix_size).wrapping_sub(<span class="number">1</span>) |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>ret = (buf.get_u8() & mask) <span class="kw">as </span>usize; |
| |
| <span class="kw">if </span>ret < mask <span class="kw">as </span>usize { |
| <span class="comment">// Value fits in the prefix bits |
| </span><span class="kw">return </span><span class="prelude-val">Ok</span>(ret); |
| } |
| |
| <span class="comment">// The int did not fit in the prefix bits, so continue reading. |
| // |
| // The total number of bytes used to represent the int. The first byte was |
| // the prefix, so start at 1. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>bytes = <span class="number">1</span>; |
| |
| <span class="comment">// The rest of the int is stored as a varint -- 7 bits for the value and 1 |
| // bit to indicate if it is the last byte. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>shift = <span class="number">0</span>; |
| |
| <span class="kw">while </span>buf.has_remaining() { |
| <span class="kw">let </span>b = buf.get_u8(); |
| |
| bytes += <span class="number">1</span>; |
| ret += ((b & VARINT_MASK) <span class="kw">as </span>usize) << shift; |
| shift += <span class="number">7</span>; |
| |
| <span class="kw">if </span>b & VARINT_FLAG == <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(ret); |
| } |
| |
| <span class="kw">if </span>bytes == MAX_BYTES { |
| <span class="comment">// The spec requires that this situation is an error |
| </span><span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::IntegerOverflow); |
| } |
| } |
| |
| <span class="prelude-val">Err</span>(DecoderError::NeedMore(NeedMore::IntegerUnderflow)) |
| } |
| |
| <span class="kw">fn </span>peek_u8<B: Buf>(buf: <span class="kw-2">&mut </span>B) -> <span class="prelude-ty">Option</span><u8> { |
| <span class="kw">if </span>buf.has_remaining() { |
| <span class="prelude-val">Some</span>(buf.chunk()[<span class="number">0</span>]) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">fn </span>take(buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>, n: usize) -> Bytes { |
| <span class="kw">let </span>pos = buf.position() <span class="kw">as </span>usize; |
| <span class="kw">let </span><span class="kw-2">mut </span>head = buf.get_mut().split_to(pos + n); |
| buf.set_position(<span class="number">0</span>); |
| head.advance(pos); |
| head.freeze() |
| } |
| |
| <span class="kw">impl </span>StringMarker { |
| <span class="kw">fn </span>consume(<span class="self">self</span>, buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>) -> Bytes { |
| buf.advance(<span class="self">self</span>.offset); |
| <span class="kw">match </span><span class="self">self</span>.string { |
| <span class="prelude-val">Some</span>(string) => { |
| buf.advance(<span class="self">self</span>.len); |
| string |
| } |
| <span class="prelude-val">None </span>=> take(buf, <span class="self">self</span>.len), |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>consume(buf: <span class="kw-2">&mut </span>Cursor<<span class="kw-2">&mut </span>BytesMut>) { |
| <span class="comment">// remove bytes from the internal BytesMut when they have been successfully |
| // decoded. This is a more permanent cursor position, which will be |
| // used to resume if decoding was only partial. |
| </span>take(buf, <span class="number">0</span>); |
| } |
| |
| <span class="comment">// ===== impl Table ===== |
| |
| </span><span class="kw">impl </span>Table { |
| <span class="kw">fn </span>new(max_size: usize) -> Table { |
| Table { |
| entries: VecDeque::new(), |
| size: <span class="number">0</span>, |
| max_size, |
| } |
| } |
| |
| <span class="kw">fn </span>size(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.size |
| } |
| |
| <span class="doccomment">/// Returns the entry located at the given index. |
| /// |
| /// The table is 1-indexed and constructed in such a way that the first |
| /// entries belong to the static table, followed by entries in the dynamic |
| /// table. They are merged into a single index address space, though. |
| /// |
| /// This is according to the [HPACK spec, section 2.3.3.] |
| /// (http://http2.github.io/http2-spec/compression.html#index.address.space) |
| </span><span class="kw">pub fn </span>get(<span class="kw-2">&</span><span class="self">self</span>, index: usize) -> <span class="prelude-ty">Result</span><Header, DecoderError> { |
| <span class="kw">if </span>index == <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DecoderError::InvalidTableIndex); |
| } |
| |
| <span class="kw">if </span>index <= <span class="number">61 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(get_static(index)); |
| } |
| |
| <span class="comment">// Convert the index for lookup in the entries structure. |
| </span><span class="kw">match </span><span class="self">self</span>.entries.get(index - <span class="number">62</span>) { |
| <span class="prelude-val">Some</span>(e) => <span class="prelude-val">Ok</span>(e.clone()), |
| <span class="prelude-val">None </span>=> <span class="prelude-val">Err</span>(DecoderError::InvalidTableIndex), |
| } |
| } |
| |
| <span class="kw">fn </span>insert(<span class="kw-2">&mut </span><span class="self">self</span>, entry: Header) { |
| <span class="kw">let </span>len = entry.len(); |
| |
| <span class="self">self</span>.reserve(len); |
| |
| <span class="kw">if </span><span class="self">self</span>.size + len <= <span class="self">self</span>.max_size { |
| <span class="self">self</span>.size += len; |
| |
| <span class="comment">// Track the entry |
| </span><span class="self">self</span>.entries.push_front(entry); |
| } |
| } |
| |
| <span class="kw">fn </span>set_max_size(<span class="kw-2">&mut </span><span class="self">self</span>, size: usize) { |
| <span class="self">self</span>.max_size = size; |
| <span class="comment">// Make the table size fit within the new constraints. |
| </span><span class="self">self</span>.consolidate(); |
| } |
| |
| <span class="kw">fn </span>reserve(<span class="kw-2">&mut </span><span class="self">self</span>, size: usize) { |
| <span class="kw">while </span><span class="self">self</span>.size + size > <span class="self">self</span>.max_size { |
| <span class="kw">match </span><span class="self">self</span>.entries.pop_back() { |
| <span class="prelude-val">Some</span>(last) => { |
| <span class="self">self</span>.size -= last.len(); |
| } |
| <span class="prelude-val">None </span>=> <span class="kw">return</span>, |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>consolidate(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">while </span><span class="self">self</span>.size > <span class="self">self</span>.max_size { |
| { |
| <span class="kw">let </span>last = <span class="kw">match </span><span class="self">self</span>.entries.back() { |
| <span class="prelude-val">Some</span>(x) => x, |
| <span class="prelude-val">None </span>=> { |
| <span class="comment">// Can never happen as the size of the table must reach |
| // 0 by the time we've exhausted all elements. |
| </span><span class="macro">panic!</span>(<span class="string">"Size of table != 0, but no headers left!"</span>); |
| } |
| }; |
| |
| <span class="self">self</span>.size -= last.len(); |
| } |
| |
| <span class="self">self</span>.entries.pop_back(); |
| } |
| } |
| } |
| |
| <span class="comment">// ===== impl DecoderError ===== |
| |
| </span><span class="kw">impl </span>From<Utf8Error> <span class="kw">for </span>DecoderError { |
| <span class="kw">fn </span>from(<span class="kw">_</span>: Utf8Error) -> DecoderError { |
| <span class="comment">// TODO: Better error? |
| </span>DecoderError::InvalidUtf8 |
| } |
| } |
| |
| <span class="kw">impl </span>From<header::InvalidHeaderValue> <span class="kw">for </span>DecoderError { |
| <span class="kw">fn </span>from(<span class="kw">_</span>: header::InvalidHeaderValue) -> DecoderError { |
| <span class="comment">// TODO: Better error? |
| </span>DecoderError::InvalidUtf8 |
| } |
| } |
| |
| <span class="kw">impl </span>From<header::InvalidHeaderName> <span class="kw">for </span>DecoderError { |
| <span class="kw">fn </span>from(<span class="kw">_</span>: header::InvalidHeaderName) -> DecoderError { |
| <span class="comment">// TODO: Better error |
| </span>DecoderError::InvalidUtf8 |
| } |
| } |
| |
| <span class="kw">impl </span>From<method::InvalidMethod> <span class="kw">for </span>DecoderError { |
| <span class="kw">fn </span>from(<span class="kw">_</span>: method::InvalidMethod) -> DecoderError { |
| <span class="comment">// TODO: Better error |
| </span>DecoderError::InvalidUtf8 |
| } |
| } |
| |
| <span class="kw">impl </span>From<status::InvalidStatusCode> <span class="kw">for </span>DecoderError { |
| <span class="kw">fn </span>from(<span class="kw">_</span>: status::InvalidStatusCode) -> DecoderError { |
| <span class="comment">// TODO: Better error |
| </span>DecoderError::InvalidUtf8 |
| } |
| } |
| |
| <span class="kw">impl </span>From<DecoderError> <span class="kw">for </span>frame::Error { |
| <span class="kw">fn </span>from(src: DecoderError) -> <span class="self">Self </span>{ |
| frame::Error::Hpack(src) |
| } |
| } |
| |
| <span class="doccomment">/// Get an entry from the static table |
| </span><span class="kw">pub fn </span>get_static(idx: usize) -> Header { |
| <span class="kw">use </span>http::header::HeaderValue; |
| |
| <span class="kw">match </span>idx { |
| <span class="number">1 </span>=> Header::Authority(BytesStr::from_static(<span class="string">""</span>)), |
| <span class="number">2 </span>=> Header::Method(Method::GET), |
| <span class="number">3 </span>=> Header::Method(Method::POST), |
| <span class="number">4 </span>=> Header::Path(BytesStr::from_static(<span class="string">"/"</span>)), |
| <span class="number">5 </span>=> Header::Path(BytesStr::from_static(<span class="string">"/index.html"</span>)), |
| <span class="number">6 </span>=> Header::Scheme(BytesStr::from_static(<span class="string">"http"</span>)), |
| <span class="number">7 </span>=> Header::Scheme(BytesStr::from_static(<span class="string">"https"</span>)), |
| <span class="number">8 </span>=> Header::Status(StatusCode::OK), |
| <span class="number">9 </span>=> Header::Status(StatusCode::NO_CONTENT), |
| <span class="number">10 </span>=> Header::Status(StatusCode::PARTIAL_CONTENT), |
| <span class="number">11 </span>=> Header::Status(StatusCode::NOT_MODIFIED), |
| <span class="number">12 </span>=> Header::Status(StatusCode::BAD_REQUEST), |
| <span class="number">13 </span>=> Header::Status(StatusCode::NOT_FOUND), |
| <span class="number">14 </span>=> Header::Status(StatusCode::INTERNAL_SERVER_ERROR), |
| <span class="number">15 </span>=> Header::Field { |
| name: header::ACCEPT_CHARSET, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">16 </span>=> Header::Field { |
| name: header::ACCEPT_ENCODING, |
| value: HeaderValue::from_static(<span class="string">"gzip, deflate"</span>), |
| }, |
| <span class="number">17 </span>=> Header::Field { |
| name: header::ACCEPT_LANGUAGE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">18 </span>=> Header::Field { |
| name: header::ACCEPT_RANGES, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">19 </span>=> Header::Field { |
| name: header::ACCEPT, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">20 </span>=> Header::Field { |
| name: header::ACCESS_CONTROL_ALLOW_ORIGIN, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">21 </span>=> Header::Field { |
| name: header::AGE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">22 </span>=> Header::Field { |
| name: header::ALLOW, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">23 </span>=> Header::Field { |
| name: header::AUTHORIZATION, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">24 </span>=> Header::Field { |
| name: header::CACHE_CONTROL, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">25 </span>=> Header::Field { |
| name: header::CONTENT_DISPOSITION, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">26 </span>=> Header::Field { |
| name: header::CONTENT_ENCODING, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">27 </span>=> Header::Field { |
| name: header::CONTENT_LANGUAGE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">28 </span>=> Header::Field { |
| name: header::CONTENT_LENGTH, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">29 </span>=> Header::Field { |
| name: header::CONTENT_LOCATION, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">30 </span>=> Header::Field { |
| name: header::CONTENT_RANGE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">31 </span>=> Header::Field { |
| name: header::CONTENT_TYPE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">32 </span>=> Header::Field { |
| name: header::COOKIE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">33 </span>=> Header::Field { |
| name: header::DATE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">34 </span>=> Header::Field { |
| name: header::ETAG, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">35 </span>=> Header::Field { |
| name: header::EXPECT, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">36 </span>=> Header::Field { |
| name: header::EXPIRES, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">37 </span>=> Header::Field { |
| name: header::FROM, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">38 </span>=> Header::Field { |
| name: header::HOST, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">39 </span>=> Header::Field { |
| name: header::IF_MATCH, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">40 </span>=> Header::Field { |
| name: header::IF_MODIFIED_SINCE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">41 </span>=> Header::Field { |
| name: header::IF_NONE_MATCH, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">42 </span>=> Header::Field { |
| name: header::IF_RANGE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">43 </span>=> Header::Field { |
| name: header::IF_UNMODIFIED_SINCE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">44 </span>=> Header::Field { |
| name: header::LAST_MODIFIED, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">45 </span>=> Header::Field { |
| name: header::LINK, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">46 </span>=> Header::Field { |
| name: header::LOCATION, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">47 </span>=> Header::Field { |
| name: header::MAX_FORWARDS, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">48 </span>=> Header::Field { |
| name: header::PROXY_AUTHENTICATE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">49 </span>=> Header::Field { |
| name: header::PROXY_AUTHORIZATION, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">50 </span>=> Header::Field { |
| name: header::RANGE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">51 </span>=> Header::Field { |
| name: header::REFERER, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">52 </span>=> Header::Field { |
| name: header::REFRESH, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">53 </span>=> Header::Field { |
| name: header::RETRY_AFTER, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">54 </span>=> Header::Field { |
| name: header::SERVER, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">55 </span>=> Header::Field { |
| name: header::SET_COOKIE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">56 </span>=> Header::Field { |
| name: header::STRICT_TRANSPORT_SECURITY, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">57 </span>=> Header::Field { |
| name: header::TRANSFER_ENCODING, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">58 </span>=> Header::Field { |
| name: header::USER_AGENT, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">59 </span>=> Header::Field { |
| name: header::VARY, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">60 </span>=> Header::Field { |
| name: header::VIA, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="number">61 </span>=> Header::Field { |
| name: header::WWW_AUTHENTICATE, |
| value: HeaderValue::from_static(<span class="string">""</span>), |
| }, |
| <span class="kw">_ </span>=> <span class="macro">unreachable!</span>(), |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::hpack::Header; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_peek_u8() { |
| <span class="kw">let </span>b = <span class="number">0xff</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = Cursor::new(<span class="macro">vec!</span>[b]); |
| <span class="macro">assert_eq!</span>(peek_u8(<span class="kw-2">&mut </span>buf), <span class="prelude-val">Some</span>(b)); |
| <span class="macro">assert_eq!</span>(buf.get_u8(), b); |
| <span class="macro">assert_eq!</span>(peek_u8(<span class="kw-2">&mut </span>buf), <span class="prelude-val">None</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_decode_string_empty() { |
| <span class="kw">let </span><span class="kw-2">mut </span>de = Decoder::new(<span class="number">0</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::new(); |
| <span class="kw">let </span>err = de.decode_string(<span class="kw-2">&mut </span>Cursor::new(<span class="kw-2">&mut </span>buf)).unwrap_err(); |
| <span class="macro">assert_eq!</span>(err, DecoderError::NeedMore(NeedMore::UnexpectedEndOfStream)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_decode_empty() { |
| <span class="kw">let </span><span class="kw-2">mut </span>de = Decoder::new(<span class="number">0</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::new(); |
| <span class="kw">let _</span>: () = de.decode(<span class="kw-2">&mut </span>Cursor::new(<span class="kw-2">&mut </span>buf), |<span class="kw">_</span>| {}).unwrap(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_decode_indexed_larger_than_table() { |
| <span class="kw">let </span><span class="kw-2">mut </span>de = Decoder::new(<span class="number">0</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::new(); |
| buf.extend([<span class="number">0b01000000</span>, <span class="number">0x80 </span>| <span class="number">2</span>]); |
| buf.extend(huff_encode(<span class="string">b"foo"</span>)); |
| buf.extend([<span class="number">0x80 </span>| <span class="number">3</span>]); |
| buf.extend(huff_encode(<span class="string">b"bar"</span>)); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>res = <span class="macro">vec!</span>[]; |
| de.decode(<span class="kw-2">&mut </span>Cursor::new(<span class="kw-2">&mut </span>buf), |h| { |
| res.push(h); |
| }) |
| .unwrap(); |
| |
| <span class="macro">assert_eq!</span>(res.len(), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(de.table.size(), <span class="number">0</span>); |
| |
| <span class="kw">match </span>res[<span class="number">0</span>] { |
| Header::Field { |
| <span class="kw-2">ref </span>name, |
| <span class="kw-2">ref </span>value, |
| } => { |
| <span class="macro">assert_eq!</span>(name, <span class="string">"foo"</span>); |
| <span class="macro">assert_eq!</span>(value, <span class="string">"bar"</span>); |
| } |
| <span class="kw">_ </span>=> <span class="macro">panic!</span>(), |
| } |
| } |
| |
| <span class="kw">fn </span>huff_encode(src: <span class="kw-2">&</span>[u8]) -> BytesMut { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::new(); |
| huffman::encode(src, <span class="kw-2">&mut </span>buf); |
| buf |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_decode_continuation_header_with_non_huff_encoded_name() { |
| <span class="kw">let </span><span class="kw-2">mut </span>de = Decoder::new(<span class="number">0</span>); |
| <span class="kw">let </span>value = huff_encode(<span class="string">b"bar"</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = BytesMut::new(); |
| <span class="comment">// header name is non_huff encoded |
| </span>buf.extend([<span class="number">0b01000000</span>, <span class="number">3</span>]); |
| buf.extend(<span class="string">b"foo"</span>); |
| <span class="comment">// header value is partial |
| </span>buf.extend([<span class="number">0x80 </span>| <span class="number">3</span>]); |
| buf.extend(<span class="kw-2">&</span>value[<span class="number">0</span>..<span class="number">1</span>]); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>res = <span class="macro">vec!</span>[]; |
| <span class="kw">let </span>e = de |
| .decode(<span class="kw-2">&mut </span>Cursor::new(<span class="kw-2">&mut </span>buf), |h| { |
| res.push(h); |
| }) |
| .unwrap_err(); |
| <span class="comment">// decode error because the header value is partial |
| </span><span class="macro">assert_eq!</span>(e, DecoderError::NeedMore(NeedMore::StringUnderflow)); |
| |
| <span class="comment">// extend buf with the remaining header value |
| </span>buf.extend(<span class="kw-2">&</span>value[<span class="number">1</span>..]); |
| de.decode(<span class="kw-2">&mut </span>Cursor::new(<span class="kw-2">&mut </span>buf), |h| { |
| res.push(h); |
| }) |
| .unwrap(); |
| |
| <span class="macro">assert_eq!</span>(res.len(), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(de.table.size(), <span class="number">0</span>); |
| |
| <span class="kw">match </span>res[<span class="number">0</span>] { |
| Header::Field { |
| <span class="kw-2">ref </span>name, |
| <span class="kw-2">ref </span>value, |
| } => { |
| <span class="macro">assert_eq!</span>(name, <span class="string">"foo"</span>); |
| <span class="macro">assert_eq!</span>(value, <span class="string">"bar"</span>); |
| } |
| <span class="kw">_ </span>=> <span class="macro">panic!</span>(), |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="h2" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
