| <!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/idna-0.3.0/src/uts46.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>uts46.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="../../idna/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="../../idna/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> |
| </pre><pre class="rust"><code><span class="comment">// Copyright 2013-2014 The rust-url developers. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| </span><span class="doccomment">//! [*Unicode IDNA Compatibility Processing* |
| //! (Unicode Technical Standard #46)](http://www.unicode.org/reports/tr46/) |
| |
| </span><span class="kw">use </span><span class="self">self</span>::Mapping::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::punycode; |
| <span class="kw">use </span>std::{error::Error <span class="kw">as </span>StdError, fmt}; |
| <span class="kw">use </span>unicode_bidi::{bidi_class, BidiClass}; |
| <span class="kw">use </span>unicode_normalization::char::is_combining_mark; |
| <span class="kw">use </span>unicode_normalization::{is_nfc, UnicodeNormalization}; |
| |
| <span class="macro">include!</span>(<span class="string">"uts46_mapping_table.rs"</span>); |
| |
| <span class="kw">const </span>PUNYCODE_PREFIX: <span class="kw-2">&</span>str = <span class="string">"xn--"</span>; |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">struct </span>StringTableSlice { |
| <span class="comment">// Store these as separate fields so the structure will have an |
| // alignment of 1 and thus pack better into the Mapping enum, below. |
| </span>byte_start_lo: u8, |
| byte_start_hi: u8, |
| byte_len: u8, |
| } |
| |
| <span class="kw">fn </span>decode_slice(slice: <span class="kw-2">&</span>StringTableSlice) -> <span class="kw-2">&</span><span class="lifetime">'static </span>str { |
| <span class="kw">let </span>lo = slice.byte_start_lo <span class="kw">as </span>usize; |
| <span class="kw">let </span>hi = slice.byte_start_hi <span class="kw">as </span>usize; |
| <span class="kw">let </span>start = (hi << <span class="number">8</span>) | lo; |
| <span class="kw">let </span>len = slice.byte_len <span class="kw">as </span>usize; |
| <span class="kw-2">&</span>STRING_TABLE[start..(start + len)] |
| } |
| |
| <span class="attribute">#[repr(u8)] |
| #[derive(Debug)] |
| </span><span class="kw">enum </span>Mapping { |
| Valid, |
| Ignored, |
| Mapped(StringTableSlice), |
| Deviation(StringTableSlice), |
| Disallowed, |
| DisallowedStd3Valid, |
| DisallowedStd3Mapped(StringTableSlice), |
| DisallowedIdna2008, |
| } |
| |
| <span class="kw">fn </span>find_char(codepoint: char) -> <span class="kw-2">&</span><span class="lifetime">'static </span>Mapping { |
| <span class="kw">let </span>idx = <span class="kw">match </span>TABLE.binary_search_by_key(<span class="kw-2">&</span>codepoint, |<span class="kw-2">&</span>val| val.<span class="number">0</span>) { |
| <span class="prelude-val">Ok</span>(idx) => idx, |
| <span class="prelude-val">Err</span>(idx) => idx - <span class="number">1</span>, |
| }; |
| |
| <span class="kw">const </span>SINGLE_MARKER: u16 = <span class="number">1 </span><< <span class="number">15</span>; |
| |
| <span class="kw">let </span>(base, x) = TABLE[idx]; |
| <span class="kw">let </span>single = (x & SINGLE_MARKER) != <span class="number">0</span>; |
| <span class="kw">let </span>offset = !SINGLE_MARKER & x; |
| |
| <span class="kw">if </span>single { |
| <span class="kw-2">&</span>MAPPING_TABLE[offset <span class="kw">as </span>usize] |
| } <span class="kw">else </span>{ |
| <span class="kw-2">&</span>MAPPING_TABLE[(offset + (codepoint <span class="kw">as </span>u16 - base <span class="kw">as </span>u16)) <span class="kw">as </span>usize] |
| } |
| } |
| |
| <span class="kw">struct </span>Mapper<<span class="lifetime">'a</span>> { |
| chars: std::str::Chars<<span class="lifetime">'a</span>>, |
| config: Config, |
| errors: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Errors, |
| slice: <span class="prelude-ty">Option</span><std::str::Chars<<span class="lifetime">'static</span>>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Iterator <span class="kw">for </span>Mapper<<span class="lifetime">'a</span>> { |
| <span class="kw">type </span>Item = char; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="kw">loop </span>{ |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(s) = <span class="kw-2">&mut </span><span class="self">self</span>.slice { |
| <span class="kw">match </span>s.next() { |
| <span class="prelude-val">Some</span>(c) => <span class="kw">return </span><span class="prelude-val">Some</span>(c), |
| <span class="prelude-val">None </span>=> { |
| <span class="self">self</span>.slice = <span class="prelude-val">None</span>; |
| } |
| } |
| } |
| |
| <span class="kw">let </span>codepoint = <span class="self">self</span>.chars.next()<span class="question-mark">?</span>; |
| <span class="kw">if let </span><span class="string">'.' </span>| <span class="string">'-' </span>| <span class="string">'a'</span>..=<span class="string">'z' </span>| <span class="string">'0'</span>..=<span class="string">'9' </span>= codepoint { |
| <span class="kw">return </span><span class="prelude-val">Some</span>(codepoint); |
| } |
| |
| <span class="kw">return </span><span class="prelude-val">Some</span>(<span class="kw">match </span><span class="kw-2">*</span>find_char(codepoint) { |
| Mapping::Valid => codepoint, |
| Mapping::Ignored => <span class="kw">continue</span>, |
| Mapping::Mapped(<span class="kw-2">ref </span>slice) => { |
| <span class="self">self</span>.slice = <span class="prelude-val">Some</span>(decode_slice(slice).chars()); |
| <span class="kw">continue</span>; |
| } |
| Mapping::Deviation(<span class="kw-2">ref </span>slice) => { |
| <span class="kw">if </span><span class="self">self</span>.config.transitional_processing { |
| <span class="self">self</span>.slice = <span class="prelude-val">Some</span>(decode_slice(slice).chars()); |
| <span class="kw">continue</span>; |
| } <span class="kw">else </span>{ |
| codepoint |
| } |
| } |
| Mapping::Disallowed => { |
| <span class="self">self</span>.errors.disallowed_character = <span class="bool-val">true</span>; |
| codepoint |
| } |
| Mapping::DisallowedStd3Valid => { |
| <span class="kw">if </span><span class="self">self</span>.config.use_std3_ascii_rules { |
| <span class="self">self</span>.errors.disallowed_by_std3_ascii_rules = <span class="bool-val">true</span>; |
| }; |
| codepoint |
| } |
| Mapping::DisallowedStd3Mapped(<span class="kw-2">ref </span>slice) => { |
| <span class="kw">if </span><span class="self">self</span>.config.use_std3_ascii_rules { |
| <span class="self">self</span>.errors.disallowed_mapped_in_std3 = <span class="bool-val">true</span>; |
| }; |
| <span class="self">self</span>.slice = <span class="prelude-val">Some</span>(decode_slice(slice).chars()); |
| <span class="kw">continue</span>; |
| } |
| Mapping::DisallowedIdna2008 => { |
| <span class="kw">if </span><span class="self">self</span>.config.use_idna_2008_rules { |
| <span class="self">self</span>.errors.disallowed_in_idna_2008 = <span class="bool-val">true</span>; |
| } |
| codepoint |
| } |
| }); |
| } |
| } |
| } |
| |
| <span class="comment">// http://tools.ietf.org/html/rfc5893#section-2 |
| </span><span class="kw">fn </span>passes_bidi(label: <span class="kw-2">&</span>str, is_bidi_domain: bool) -> bool { |
| <span class="comment">// Rule 0: Bidi Rules apply to Bidi Domain Names: a name with at least one RTL label. A label |
| // is RTL if it contains at least one character of bidi class R, AL or AN. |
| </span><span class="kw">if </span>!is_bidi_domain { |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>chars = label.chars(); |
| <span class="kw">let </span>first_char_class = <span class="kw">match </span>chars.next() { |
| <span class="prelude-val">Some</span>(c) => bidi_class(c), |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="bool-val">true</span>, <span class="comment">// empty string |
| </span>}; |
| |
| <span class="kw">match </span>first_char_class { |
| <span class="comment">// LTR label |
| </span>BidiClass::L => { |
| <span class="comment">// Rule 5 |
| </span><span class="kw">for </span>c <span class="kw">in </span>chars.by_ref() { |
| <span class="kw">if </span>!<span class="macro">matches!</span>( |
| bidi_class(c), |
| BidiClass::L |
| | BidiClass::EN |
| | BidiClass::ES |
| | BidiClass::CS |
| | BidiClass::ET |
| | BidiClass::ON |
| | BidiClass::BN |
| | BidiClass::NSM |
| ) { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } |
| |
| <span class="comment">// Rule 6 |
| // must end in L or EN followed by 0 or more NSM |
| </span><span class="kw">let </span><span class="kw-2">mut </span>rev_chars = label.chars().rev(); |
| <span class="kw">let </span><span class="kw-2">mut </span>last_non_nsm = rev_chars.next(); |
| <span class="kw">loop </span>{ |
| <span class="kw">match </span>last_non_nsm { |
| <span class="prelude-val">Some</span>(c) <span class="kw">if </span>bidi_class(c) == BidiClass::NSM => { |
| last_non_nsm = rev_chars.next(); |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">_ </span>=> { |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| <span class="kw">match </span>last_non_nsm { |
| <span class="prelude-val">Some</span>(c) <span class="kw">if </span>bidi_class(c) == BidiClass::L || bidi_class(c) == BidiClass::EN => {} |
| <span class="prelude-val">Some</span>(<span class="kw">_</span>) => { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| <span class="kw">_ </span>=> {} |
| } |
| } |
| |
| <span class="comment">// RTL label |
| </span>BidiClass::R | BidiClass::AL => { |
| <span class="kw">let </span><span class="kw-2">mut </span>found_en = <span class="bool-val">false</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>found_an = <span class="bool-val">false</span>; |
| |
| <span class="comment">// Rule 2 |
| </span><span class="kw">for </span>c <span class="kw">in </span>chars { |
| <span class="kw">let </span>char_class = bidi_class(c); |
| <span class="kw">if </span>char_class == BidiClass::EN { |
| found_en = <span class="bool-val">true</span>; |
| } <span class="kw">else if </span>char_class == BidiClass::AN { |
| found_an = <span class="bool-val">true</span>; |
| } |
| |
| <span class="kw">if </span>!<span class="macro">matches!</span>( |
| char_class, |
| BidiClass::R |
| | BidiClass::AL |
| | BidiClass::AN |
| | BidiClass::EN |
| | BidiClass::ES |
| | BidiClass::CS |
| | BidiClass::ET |
| | BidiClass::ON |
| | BidiClass::BN |
| | BidiClass::NSM |
| ) { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } |
| <span class="comment">// Rule 3 |
| </span><span class="kw">let </span><span class="kw-2">mut </span>rev_chars = label.chars().rev(); |
| <span class="kw">let </span><span class="kw-2">mut </span>last = rev_chars.next(); |
| <span class="kw">loop </span>{ |
| <span class="comment">// must end in L or EN followed by 0 or more NSM |
| </span><span class="kw">match </span>last { |
| <span class="prelude-val">Some</span>(c) <span class="kw">if </span>bidi_class(c) == BidiClass::NSM => { |
| last = rev_chars.next(); |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">_ </span>=> { |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| <span class="kw">match </span>last { |
| <span class="prelude-val">Some</span>(c) |
| <span class="kw">if </span><span class="macro">matches!</span>( |
| bidi_class(c), |
| BidiClass::R | BidiClass::AL | BidiClass::EN | BidiClass::AN |
| ) => {} |
| <span class="kw">_ </span>=> { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } |
| |
| <span class="comment">// Rule 4 |
| </span><span class="kw">if </span>found_an && found_en { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } |
| |
| <span class="comment">// Rule 1: Should start with L or R/AL |
| </span><span class="kw">_ </span>=> { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } |
| |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="doccomment">/// Check the validity criteria for the given label |
| /// |
| /// V1 (NFC) and V8 (Bidi) are checked inside `processing()` to prevent doing duplicate work. |
| /// |
| /// http://www.unicode.org/reports/tr46/#Validity_Criteria |
| </span><span class="kw">fn </span>check_validity(label: <span class="kw-2">&</span>str, config: Config, errors: <span class="kw-2">&mut </span>Errors) { |
| <span class="kw">let </span>first_char = label.chars().next(); |
| <span class="kw">if </span>first_char == <span class="prelude-val">None </span>{ |
| <span class="comment">// Empty string, pass |
| </span><span class="kw">return</span>; |
| } |
| |
| <span class="comment">// V2: No U+002D HYPHEN-MINUS in both third and fourth positions. |
| // |
| // NOTE: Spec says that the label must not contain a HYPHEN-MINUS character in both the |
| // third and fourth positions. But nobody follows this criteria. See the spec issue below: |
| // https://github.com/whatwg/url/issues/53 |
| |
| // V3: neither begin nor end with a U+002D HYPHEN-MINUS |
| </span><span class="kw">if </span>config.check_hyphens && (label.starts_with(<span class="string">'-'</span>) || label.ends_with(<span class="string">'-'</span>)) { |
| errors.check_hyphens = <span class="bool-val">true</span>; |
| <span class="kw">return</span>; |
| } |
| |
| <span class="comment">// V4: not contain a U+002E FULL STOP |
| // |
| // Here, label can't contain '.' since the input is from .split('.') |
| |
| // V5: not begin with a GC=Mark |
| </span><span class="kw">if </span>is_combining_mark(first_char.unwrap()) { |
| errors.start_combining_mark = <span class="bool-val">true</span>; |
| <span class="kw">return</span>; |
| } |
| |
| <span class="comment">// V6: Check against Mapping Table |
| </span><span class="kw">if </span>label.chars().any(|c| <span class="kw">match </span><span class="kw-2">*</span>find_char(c) { |
| Mapping::Valid | Mapping::DisallowedIdna2008 => <span class="bool-val">false</span>, |
| Mapping::Deviation(<span class="kw">_</span>) => config.transitional_processing, |
| Mapping::DisallowedStd3Valid => config.use_std3_ascii_rules, |
| <span class="kw">_ </span>=> <span class="bool-val">true</span>, |
| }) { |
| errors.invalid_mapping = <span class="bool-val">true</span>; |
| } |
| |
| <span class="comment">// V7: ContextJ rules |
| // |
| // TODO: Implement rules and add *CheckJoiners* flag. |
| |
| // V8: Bidi rules are checked inside `processing()` |
| </span>} |
| |
| <span class="comment">// Detect simple cases: all lowercase ASCII characters and digits where none |
| // of the labels start with PUNYCODE_PREFIX and labels don't start or end with hyphen. |
| </span><span class="kw">fn </span>is_simple(domain: <span class="kw-2">&</span>str) -> bool { |
| <span class="kw">if </span>domain.is_empty() { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| <span class="kw">let </span>(<span class="kw-2">mut </span>prev, <span class="kw-2">mut </span>puny_prefix) = (<span class="string">'?'</span>, <span class="number">0</span>); |
| <span class="kw">for </span>c <span class="kw">in </span>domain.chars() { |
| <span class="kw">if </span>c == <span class="string">'.' </span>{ |
| <span class="kw">if </span>prev == <span class="string">'-' </span>{ |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| puny_prefix = <span class="number">0</span>; |
| <span class="kw">continue</span>; |
| } <span class="kw">else if </span>puny_prefix == <span class="number">0 </span>&& c == <span class="string">'-' </span>{ |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } <span class="kw">else if </span>puny_prefix < <span class="number">5 </span>{ |
| <span class="kw">if </span>c == [<span class="string">'x'</span>, <span class="string">'n'</span>, <span class="string">'-'</span>, <span class="string">'-'</span>][puny_prefix] { |
| puny_prefix += <span class="number">1</span>; |
| <span class="kw">if </span>puny_prefix == <span class="number">4 </span>{ |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } <span class="kw">else </span>{ |
| puny_prefix = <span class="number">5</span>; |
| } |
| } |
| <span class="kw">if </span>!c.is_ascii_lowercase() && !c.is_ascii_digit() { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| prev = c; |
| } |
| |
| <span class="bool-val">true |
| </span>} |
| |
| <span class="doccomment">/// http://www.unicode.org/reports/tr46/#Processing |
| </span><span class="kw">fn </span>processing( |
| domain: <span class="kw-2">&</span>str, |
| config: Config, |
| normalized: <span class="kw-2">&mut </span>String, |
| output: <span class="kw-2">&mut </span>String, |
| ) -> Errors { |
| normalized.clear(); |
| <span class="kw">let </span><span class="kw-2">mut </span>errors = Errors::default(); |
| <span class="kw">let </span>offset = output.len(); |
| |
| <span class="kw">let </span>iter = Mapper { |
| chars: domain.chars(), |
| config, |
| errors: <span class="kw-2">&mut </span>errors, |
| slice: <span class="prelude-val">None</span>, |
| }; |
| |
| normalized.extend(iter.nfc()); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>decoder = punycode::Decoder::default(); |
| <span class="kw">let </span>non_transitional = config.transitional_processing(<span class="bool-val">false</span>); |
| <span class="kw">let </span>(<span class="kw-2">mut </span>first, <span class="kw-2">mut </span>has_bidi_labels) = (<span class="bool-val">true</span>, <span class="bool-val">false</span>); |
| <span class="kw">for </span>label <span class="kw">in </span>normalized.split(<span class="string">'.'</span>) { |
| <span class="kw">if </span>!first { |
| output.push(<span class="string">'.'</span>); |
| } |
| first = <span class="bool-val">false</span>; |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(remainder) = label.strip_prefix(PUNYCODE_PREFIX) { |
| <span class="kw">match </span>decoder.decode(remainder) { |
| <span class="prelude-val">Ok</span>(decode) => { |
| <span class="kw">let </span>start = output.len(); |
| output.extend(decode); |
| <span class="kw">let </span>decoded_label = <span class="kw-2">&</span>output[start..]; |
| |
| <span class="kw">if </span>!has_bidi_labels { |
| has_bidi_labels |= is_bidi_domain(decoded_label); |
| } |
| |
| <span class="kw">if </span>!errors.is_err() { |
| <span class="kw">if </span>!is_nfc(decoded_label) { |
| errors.nfc = <span class="bool-val">true</span>; |
| } <span class="kw">else </span>{ |
| check_validity(decoded_label, non_transitional, <span class="kw-2">&mut </span>errors); |
| } |
| } |
| } |
| <span class="prelude-val">Err</span>(()) => { |
| has_bidi_labels = <span class="bool-val">true</span>; |
| errors.punycode = <span class="bool-val">true</span>; |
| } |
| } |
| } <span class="kw">else </span>{ |
| <span class="kw">if </span>!has_bidi_labels { |
| has_bidi_labels |= is_bidi_domain(label); |
| } |
| |
| <span class="comment">// `normalized` is already `NFC` so we can skip that check |
| </span>check_validity(label, config, <span class="kw-2">&mut </span>errors); |
| output.push_str(label) |
| } |
| } |
| |
| <span class="kw">for </span>label <span class="kw">in </span>output[offset..].split(<span class="string">'.'</span>) { |
| <span class="comment">// V8: Bidi rules |
| // |
| // TODO: Add *CheckBidi* flag |
| </span><span class="kw">if </span>!passes_bidi(label, has_bidi_labels) { |
| errors.check_bidi = <span class="bool-val">true</span>; |
| <span class="kw">break</span>; |
| } |
| } |
| |
| errors |
| } |
| |
| <span class="attribute">#[derive(Default)] |
| </span><span class="kw">pub struct </span>Idna { |
| config: Config, |
| normalized: String, |
| output: String, |
| } |
| |
| <span class="kw">impl </span>Idna { |
| <span class="kw">pub fn </span>new(config: Config) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ |
| config, |
| normalized: String::new(), |
| output: String::new(), |
| } |
| } |
| |
| <span class="kw">pub fn </span>to_ascii_inner(<span class="kw-2">&mut </span><span class="self">self</span>, domain: <span class="kw-2">&</span>str, out: <span class="kw-2">&mut </span>String) -> Errors { |
| <span class="kw">if </span>is_simple(domain) { |
| out.push_str(domain); |
| <span class="kw">return </span>Errors::default(); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>errors = processing(domain, <span class="self">self</span>.config, <span class="kw-2">&mut </span><span class="self">self</span>.normalized, out); |
| <span class="self">self</span>.output = std::mem::replace(out, String::with_capacity(out.len())); |
| <span class="kw">let </span><span class="kw-2">mut </span>first = <span class="bool-val">true</span>; |
| <span class="kw">for </span>label <span class="kw">in </span><span class="self">self</span>.output.split(<span class="string">'.'</span>) { |
| <span class="kw">if </span>!first { |
| out.push(<span class="string">'.'</span>); |
| } |
| first = <span class="bool-val">false</span>; |
| |
| <span class="kw">if </span>label.is_ascii() { |
| out.push_str(label); |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>offset = out.len(); |
| out.push_str(PUNYCODE_PREFIX); |
| <span class="kw">if let </span><span class="prelude-val">Err</span>(()) = punycode::encode_into(label.chars(), out) { |
| errors.punycode = <span class="bool-val">true</span>; |
| out.truncate(offset); |
| } |
| } |
| } |
| errors |
| } |
| |
| <span class="doccomment">/// http://www.unicode.org/reports/tr46/#ToASCII |
| </span><span class="attribute">#[allow(clippy::wrong_self_convention)] |
| </span><span class="kw">pub fn </span>to_ascii<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span><span class="self">self</span>, domain: <span class="kw-2">&</span>str, out: <span class="kw-2">&mut </span>String) -> <span class="prelude-ty">Result</span><(), Errors> { |
| <span class="kw">let </span><span class="kw-2">mut </span>errors = <span class="self">self</span>.to_ascii_inner(domain, out); |
| |
| <span class="kw">if </span><span class="self">self</span>.config.verify_dns_length { |
| <span class="kw">let </span>domain = <span class="kw">if </span>out.ends_with(<span class="string">'.'</span>) { |
| <span class="kw-2">&</span>out[..out.len() - <span class="number">1</span>] |
| } <span class="kw">else </span>{ |
| <span class="kw-2">&*</span>out |
| }; |
| <span class="kw">if </span>domain.is_empty() || domain.split(<span class="string">'.'</span>).any(|label| label.is_empty()) { |
| errors.too_short_for_dns = <span class="bool-val">true</span>; |
| } |
| <span class="kw">if </span>domain.len() > <span class="number">253 </span>|| domain.split(<span class="string">'.'</span>).any(|label| label.len() > <span class="number">63</span>) { |
| errors.too_long_for_dns = <span class="bool-val">true</span>; |
| } |
| } |
| |
| errors.into() |
| } |
| |
| <span class="doccomment">/// http://www.unicode.org/reports/tr46/#ToUnicode |
| </span><span class="attribute">#[allow(clippy::wrong_self_convention)] |
| </span><span class="kw">pub fn </span>to_unicode<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span><span class="self">self</span>, domain: <span class="kw-2">&</span>str, out: <span class="kw-2">&mut </span>String) -> <span class="prelude-ty">Result</span><(), Errors> { |
| <span class="kw">if </span>is_simple(domain) { |
| out.push_str(domain); |
| <span class="kw">return </span>Errors::default().into(); |
| } |
| processing(domain, <span class="self">self</span>.config, <span class="kw-2">&mut </span><span class="self">self</span>.normalized, out).into() |
| } |
| } |
| |
| <span class="attribute">#[derive(Clone, Copy)] |
| </span><span class="kw">pub struct </span>Config { |
| use_std3_ascii_rules: bool, |
| transitional_processing: bool, |
| verify_dns_length: bool, |
| check_hyphens: bool, |
| use_idna_2008_rules: bool, |
| } |
| |
| <span class="doccomment">/// The defaults are that of https://url.spec.whatwg.org/#idna |
| </span><span class="kw">impl </span>Default <span class="kw">for </span>Config { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| Config { |
| use_std3_ascii_rules: <span class="bool-val">false</span>, |
| transitional_processing: <span class="bool-val">false</span>, |
| check_hyphens: <span class="bool-val">false</span>, |
| <span class="comment">// check_bidi: true, |
| // check_joiners: true, |
| |
| // Only use for to_ascii, not to_unicode |
| </span>verify_dns_length: <span class="bool-val">false</span>, |
| use_idna_2008_rules: <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Config { |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>use_std3_ascii_rules(<span class="kw-2">mut </span><span class="self">self</span>, value: bool) -> <span class="self">Self </span>{ |
| <span class="self">self</span>.use_std3_ascii_rules = value; |
| <span class="self">self |
| </span>} |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>transitional_processing(<span class="kw-2">mut </span><span class="self">self</span>, value: bool) -> <span class="self">Self </span>{ |
| <span class="self">self</span>.transitional_processing = value; |
| <span class="self">self |
| </span>} |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>verify_dns_length(<span class="kw-2">mut </span><span class="self">self</span>, value: bool) -> <span class="self">Self </span>{ |
| <span class="self">self</span>.verify_dns_length = value; |
| <span class="self">self |
| </span>} |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>check_hyphens(<span class="kw-2">mut </span><span class="self">self</span>, value: bool) -> <span class="self">Self </span>{ |
| <span class="self">self</span>.check_hyphens = value; |
| <span class="self">self |
| </span>} |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>use_idna_2008_rules(<span class="kw-2">mut </span><span class="self">self</span>, value: bool) -> <span class="self">Self </span>{ |
| <span class="self">self</span>.use_idna_2008_rules = value; |
| <span class="self">self |
| </span>} |
| |
| <span class="doccomment">/// http://www.unicode.org/reports/tr46/#ToASCII |
| </span><span class="kw">pub fn </span>to_ascii(<span class="self">self</span>, domain: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><String, Errors> { |
| <span class="kw">let </span><span class="kw-2">mut </span>result = String::with_capacity(domain.len()); |
| <span class="kw">let </span><span class="kw-2">mut </span>codec = Idna::new(<span class="self">self</span>); |
| codec.to_ascii(domain, <span class="kw-2">&mut </span>result).map(|()| result) |
| } |
| |
| <span class="doccomment">/// http://www.unicode.org/reports/tr46/#ToUnicode |
| </span><span class="kw">pub fn </span>to_unicode(<span class="self">self</span>, domain: <span class="kw-2">&</span>str) -> (String, <span class="prelude-ty">Result</span><(), Errors>) { |
| <span class="kw">let </span><span class="kw-2">mut </span>codec = Idna::new(<span class="self">self</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>out = String::with_capacity(domain.len()); |
| <span class="kw">let </span>result = codec.to_unicode(domain, <span class="kw-2">&mut </span>out); |
| (out, result) |
| } |
| } |
| |
| <span class="kw">fn </span>is_bidi_domain(s: <span class="kw-2">&</span>str) -> bool { |
| <span class="kw">for </span>c <span class="kw">in </span>s.chars() { |
| <span class="kw">if </span>c.is_ascii_graphic() { |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">match </span>bidi_class(c) { |
| BidiClass::R | BidiClass::AL | BidiClass::AN => <span class="kw">return </span><span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> {} |
| } |
| } |
| <span class="bool-val">false |
| </span>} |
| |
| <span class="doccomment">/// Errors recorded during UTS #46 processing. |
| /// |
| /// This is opaque for now, indicating what types of errors have been encountered at least once. |
| /// More details may be exposed in the future. |
| </span><span class="attribute">#[derive(Default)] |
| </span><span class="kw">pub struct </span>Errors { |
| punycode: bool, |
| check_hyphens: bool, |
| check_bidi: bool, |
| start_combining_mark: bool, |
| invalid_mapping: bool, |
| nfc: bool, |
| disallowed_by_std3_ascii_rules: bool, |
| disallowed_mapped_in_std3: bool, |
| disallowed_character: bool, |
| too_long_for_dns: bool, |
| too_short_for_dns: bool, |
| disallowed_in_idna_2008: bool, |
| } |
| |
| <span class="kw">impl </span>Errors { |
| <span class="kw">fn </span>is_err(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">let </span>Errors { |
| punycode, |
| check_hyphens, |
| check_bidi, |
| start_combining_mark, |
| invalid_mapping, |
| nfc, |
| disallowed_by_std3_ascii_rules, |
| disallowed_mapped_in_std3, |
| disallowed_character, |
| too_long_for_dns, |
| too_short_for_dns, |
| disallowed_in_idna_2008, |
| } = <span class="kw-2">*</span><span class="self">self</span>; |
| punycode |
| || check_hyphens |
| || check_bidi |
| || start_combining_mark |
| || invalid_mapping |
| || nfc |
| || disallowed_by_std3_ascii_rules |
| || disallowed_mapped_in_std3 |
| || disallowed_character |
| || too_long_for_dns |
| || too_short_for_dns |
| || disallowed_in_idna_2008 |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Errors { |
| <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="kw">let </span>Errors { |
| punycode, |
| check_hyphens, |
| check_bidi, |
| start_combining_mark, |
| invalid_mapping, |
| nfc, |
| disallowed_by_std3_ascii_rules, |
| disallowed_mapped_in_std3, |
| disallowed_character, |
| too_long_for_dns, |
| too_short_for_dns, |
| disallowed_in_idna_2008, |
| } = <span class="kw-2">*</span><span class="self">self</span>; |
| |
| <span class="kw">let </span>fields = [ |
| (<span class="string">"punycode"</span>, punycode), |
| (<span class="string">"check_hyphens"</span>, check_hyphens), |
| (<span class="string">"check_bidi"</span>, check_bidi), |
| (<span class="string">"start_combining_mark"</span>, start_combining_mark), |
| (<span class="string">"invalid_mapping"</span>, invalid_mapping), |
| (<span class="string">"nfc"</span>, nfc), |
| ( |
| <span class="string">"disallowed_by_std3_ascii_rules"</span>, |
| disallowed_by_std3_ascii_rules, |
| ), |
| (<span class="string">"disallowed_mapped_in_std3"</span>, disallowed_mapped_in_std3), |
| (<span class="string">"disallowed_character"</span>, disallowed_character), |
| (<span class="string">"too_long_for_dns"</span>, too_long_for_dns), |
| (<span class="string">"too_short_for_dns"</span>, too_short_for_dns), |
| (<span class="string">"disallowed_in_idna_2008"</span>, disallowed_in_idna_2008), |
| ]; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>empty = <span class="bool-val">true</span>; |
| f.write_str(<span class="string">"Errors { "</span>)<span class="question-mark">?</span>; |
| <span class="kw">for </span>(name, val) <span class="kw">in </span><span class="kw-2">&</span>fields { |
| <span class="kw">if </span><span class="kw-2">*</span>val { |
| <span class="kw">if </span>!empty { |
| f.write_str(<span class="string">", "</span>)<span class="question-mark">?</span>; |
| } |
| f.write_str(<span class="kw-2">*</span>name)<span class="question-mark">?</span>; |
| empty = <span class="bool-val">false</span>; |
| } |
| } |
| |
| <span class="kw">if </span>!empty { |
| f.write_str(<span class="string">" }"</span>) |
| } <span class="kw">else </span>{ |
| f.write_str(<span class="string">"}"</span>) |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>From<Errors> <span class="kw">for </span><span class="prelude-ty">Result</span><(), Errors> { |
| <span class="kw">fn </span>from(e: Errors) -> <span class="prelude-ty">Result</span><(), Errors> { |
| <span class="kw">if </span>!e.is_err() { |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(e) |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>StdError <span class="kw">for </span>Errors {} |
| |
| <span class="kw">impl </span>fmt::Display <span class="kw">for </span>Errors { |
| <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="self">self</span>, f) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::{find_char, Mapping}; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>mapping_fast_path() { |
| <span class="macro">assert_matches!</span>(find_char(<span class="string">'-'</span>), <span class="kw-2">&</span>Mapping::Valid); |
| <span class="macro">assert_matches!</span>(find_char(<span class="string">'.'</span>), <span class="kw-2">&</span>Mapping::Valid); |
| <span class="kw">for </span>c <span class="kw">in </span><span class="kw-2">&</span>[<span class="string">'0'</span>, <span class="string">'1'</span>, <span class="string">'2'</span>, <span class="string">'3'</span>, <span class="string">'4'</span>, <span class="string">'5'</span>, <span class="string">'6'</span>, <span class="string">'7'</span>, <span class="string">'8'</span>, <span class="string">'9'</span>] { |
| <span class="macro">assert_matches!</span>(find_char(<span class="kw-2">*</span>c), <span class="kw-2">&</span>Mapping::Valid); |
| } |
| <span class="kw">for </span>c <span class="kw">in </span><span class="kw-2">&</span>[ |
| <span class="string">'a'</span>, <span class="string">'b'</span>, <span class="string">'c'</span>, <span class="string">'d'</span>, <span class="string">'e'</span>, <span class="string">'f'</span>, <span class="string">'g'</span>, <span class="string">'h'</span>, <span class="string">'i'</span>, <span class="string">'j'</span>, <span class="string">'k'</span>, <span class="string">'l'</span>, <span class="string">'m'</span>, <span class="string">'n'</span>, <span class="string">'o'</span>, <span class="string">'p'</span>, <span class="string">'q'</span>, |
| <span class="string">'r'</span>, <span class="string">'s'</span>, <span class="string">'t'</span>, <span class="string">'u'</span>, <span class="string">'v'</span>, <span class="string">'w'</span>, <span class="string">'x'</span>, <span class="string">'y'</span>, <span class="string">'z'</span>, |
| ] { |
| <span class="macro">assert_matches!</span>(find_char(<span class="kw-2">*</span>c), <span class="kw-2">&</span>Mapping::Valid); |
| } |
| } |
| } |
| </code></pre></div> |
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