chore: checkpoint before Python removal

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+checksum = "28cc31741b18cb6f1d5ff12f5b7523e3d6eb0852bbbad19d73905511d9849b95"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ec111ce797d0e0784a1116d0ddcdbea84322cd79e5d5ad173daeba4f93ab55"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ea7b4a3637ea8669cedf0f1fd5c286a17f3de97b8dd5a70a6c167a1730e63a5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa2b893d79df23bfb12d5461018d408ea19dfafe76c2c7ef6d4eba614f8ff079"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]

vendor/idna/Cargo.toml

@@ -0,0 +1,89 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+rust-version = "1.57"
+name = "idna"
+version = "1.1.0"
+authors = ["The rust-url developers"]
+build = false
+autolib = false
+autobins = false
+autoexamples = false
+autotests = false
+autobenches = false
+description = "IDNA (Internationalizing Domain Names in Applications) and Punycode."
+readme = "README.md"
+keywords = [
+    "no-std",
+    "web",
+    "http",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/servo/rust-url/"
+
+[package.metadata.docs.rs]
+rustdoc-args = ["--generate-link-to-definition"]
+
+[features]
+alloc = []
+compiled_data = ["idna_adapter/compiled_data"]
+default = [
+    "std",
+    "compiled_data",
+]
+std = ["alloc"]
+
+[lib]
+name = "idna"
+path = "src/lib.rs"
+doctest = false
+
+[[test]]
+name = "tests"
+path = "tests/tests.rs"
+harness = false
+
+[[test]]
+name = "unit"
+path = "tests/unit.rs"
+
+[[test]]
+name = "unitbis"
+path = "tests/unitbis.rs"
+
+[[bench]]
+name = "all"
+path = "benches/all.rs"
+harness = false
+
+[dependencies.idna_adapter]
+version = "1"
+
+[dependencies.smallvec]
+version = "1.13.1"
+features = ["const_generics"]
+
+[dependencies.utf8_iter]
+version = "1.0.4"
+
+[dev-dependencies.assert_matches]
+version = "1.3"
+
+[dev-dependencies.bencher]
+version = "0.1"
+
+[dev-dependencies.serde_json]
+version = "1.0"
+
+[dev-dependencies.tester]
+version = "0.9"

vendor/idna/LICENSE-APACHE

@@ -0,0 +1,201 @@
+                              Apache License
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+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+See the License for the specific language governing permissions and
+limitations under the License.

vendor/idna/LICENSE-MIT

@@ -0,0 +1,25 @@
+Copyright (c) 2013-2025 The rust-url developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

vendor/idna/README.md

@@ -0,0 +1,46 @@
+# `idna`
+
+IDNA library for Rust implementing [UTS 46: Unicode IDNA Compatibility Processing](https://www.unicode.org/reports/tr46/) as parametrized by the [WHATWG URL Standard](https://url.spec.whatwg.org/#idna).
+
+## What it does
+
+* An implementation of UTS 46 is provided, with configurable ASCII deny list (e.g. STD3 or WHATWG rules).
+* A callback mechanism is provided for pluggable logic for deciding if a label is deemed potentially too misleading to render as Unicode in a user interface.
+* Errors are marked as U+FFFD REPLACEMENT CHARACTERs in Unicode output so that locations of errors may be illustrated to the user.
+
+## What it does not do
+
+* There is no default/sample policy provided for the callback mechanism mentioned above.
+* Only UTS 46 is implemented: There is no API to request strictly IDNA 2008 only or strictly IDNA 2003 only.
+* There is no API for categorizing errors beyond there being an error.
+* Checks that are configurable in UTS 46 but that the WHATWG URL Standard always set a particular way (regardless of the _beStrict_ flag in the URL Standard) cannot be configured (with the exception of the old deprecated API supporting transitional processing).
+
+## Usage
+
+Apps that need to prepare a hostname for usage in protocols are likely to only need the top-level function `domain_to_ascii_cow` with `AsciiDenyList::URL` as the second argument. Note that this rejects IPv6 addresses, so before this, you need to check if the first byte of the input is `b'['` and, if it is, treat the input as an IPv6 address instead.
+
+Apps that need to display host names to the user should use `uts46::Uts46::to_user_interface`. The _ToUnicode_ operation is rarely appropriate for direct application usage.
+
+## Cargo features
+
+* `alloc` - For future proofing. Currently always required. Currently, the crate internal may allocate heap but for typical inputs do not allocate on the heap (apart from the output `String` when applicable).
+* `compiled_data` - For future proofing. Currently always required. (Passed through to ICU4X.)
+* `std` - Adds `impl std::error::Error for Errors {}` (and implies `alloc`).
+* By default, all of the above are enabled.
+
+## Alternative Unicode back ends
+
+By default, `idna` uses [ICU4X](https://github.com/unicode-org/icu4x/) as its Unicode back end. If you wish to opt for different tradeoffs between correctness, run-time performance, binary size, compile time, and MSRV, please see the [README of the latest version of the `idna_adapter` crate](https://docs.rs/crate/idna_adapter/latest) for how to opt into a different Unicode back end.
+
+## Breaking changes since 0.5.0
+
+* Stricter IDNA 2008 restrictions are no longer supported. Attempting to enable them panics immediately. UTS 46 allows all the names that IDNA 2008 allows, and when transitional processing is disabled, they resolve the same way. There are additional names that IDNA 2008 disallows but UTS 46 maps to names that IDNA 2008 allows (notably, input is mapped to fold-case output). UTS 46 also allows symbols that were allowed in IDNA 2003 as well as newer symbols that are allowed according to the same principle. (Earlier versions of this crate allowed rejecting such symbols. Rejecting characters that UTS 46 maps to IDNA 2008-permitted characters wasn't supported in earlier versions, either.)
+* `domain_to_ascii_strict` now performs the _CheckHyphens_ check (matching previous documentation).
+* The ContextJ rules are now implemented and always enabled, even when using the old deprecated API, so input that fails those rules is rejected.
+* The `Idna::to_ascii_inner` method has been removed. It didn't make sense as a public method, since callers were unable to figure out if there were errors. (A GitHub search found no callers for this method.)
+* Punycode labels whose decoding does not yield any non-ASCII characters are now treated as being in error.
+* When turning off default cargo features, the cargo feature `compiled_data` needs to be explicitly enabled.
+
+## License
+
+MIT OR Apache-2.0 for the code. Additionally, there is a test data file, IdnaTestV2.txt, under Unicode-3.0.

vendor/idna/benches/all.rs

@@ -0,0 +1,116 @@
+#![allow(deprecated)]
+
+#[macro_use]
+extern crate bencher;
+extern crate idna;
+
+use bencher::{black_box, Bencher};
+use idna::Config;
+
+fn to_unicode_puny_label(bench: &mut Bencher) {
+    let encoded = "abc.xn--mgbcm";
+    let config = Config::default();
+    bench.iter(|| config.to_unicode(black_box(encoded)));
+}
+
+fn to_ascii_already_puny_label(bench: &mut Bencher) {
+    let encoded = "abc.xn--mgbcm";
+    let config = Config::default();
+    bench.iter(|| config.to_ascii(black_box(encoded)));
+}
+
+fn to_unicode_ascii(bench: &mut Bencher) {
+    let encoded = "example.com";
+    let config = Config::default();
+    bench.iter(|| config.to_unicode(black_box(encoded)));
+}
+
+fn to_unicode_merged_label(bench: &mut Bencher) {
+    let encoded = "Beispiel.xn--vermgensberater-ctb";
+    let config = Config::default();
+    bench.iter(|| config.to_unicode(black_box(encoded)));
+}
+
+fn to_ascii_puny_label(bench: &mut Bencher) {
+    let encoded = "abc.ابج";
+    let config = Config::default();
+    bench.iter(|| config.to_ascii(black_box(encoded)));
+}
+
+fn to_ascii_simple(bench: &mut Bencher) {
+    let encoded = "example.com";
+    let config = Config::default();
+    bench.iter(|| config.to_ascii(black_box(encoded)));
+}
+
+fn to_ascii_merged(bench: &mut Bencher) {
+    let encoded = "beispiel.vermögensberater";
+    let config = Config::default();
+    bench.iter(|| config.to_ascii(black_box(encoded)));
+}
+
+fn to_ascii_cow_plain(bench: &mut Bencher) {
+    let encoded = "example.com".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_hyphen(bench: &mut Bencher) {
+    let encoded = "hyphenated-example.com".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_leading_digit(bench: &mut Bencher) {
+    let encoded = "1test.example".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_unicode_mixed(bench: &mut Bencher) {
+    let encoded = "مثال.example".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_punycode_mixed(bench: &mut Bencher) {
+    let encoded = "xn--mgbh0fb.example".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_unicode_ltr(bench: &mut Bencher) {
+    let encoded = "නම.උදාහරණ".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_punycode_ltr(bench: &mut Bencher) {
+    let encoded = "xn--r0co.xn--ozc8dl2c3bxd".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_unicode_rtl(bench: &mut Bencher) {
+    let encoded = "الاسم.مثال".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+fn to_ascii_cow_punycode_rtl(bench: &mut Bencher) {
+    let encoded = "xn--mgba0b1dh.xn--mgbh0fb".as_bytes();
+    bench.iter(|| idna::domain_to_ascii_cow(black_box(encoded), idna::AsciiDenyList::URL));
+}
+
+benchmark_group!(
+    benches,
+    to_unicode_puny_label,
+    to_unicode_ascii,
+    to_unicode_merged_label,
+    to_ascii_puny_label,
+    to_ascii_already_puny_label,
+    to_ascii_simple,
+    to_ascii_merged,
+    to_ascii_cow_plain,
+    to_ascii_cow_hyphen,
+    to_ascii_cow_leading_digit,
+    to_ascii_cow_unicode_mixed,
+    to_ascii_cow_punycode_mixed,
+    to_ascii_cow_unicode_ltr,
+    to_ascii_cow_punycode_ltr,
+    to_ascii_cow_unicode_rtl,
+    to_ascii_cow_punycode_rtl,
+);
+benchmark_main!(benches);

vendor/idna/src/deprecated.rs

@@ -0,0 +1,248 @@
+// 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.
+
+//! Deprecated API for [*Unicode IDNA Compatibility Processing*
+//! (Unicode Technical Standard #46)](http://www.unicode.org/reports/tr46/)
+
+#![allow(deprecated)]
+
+use alloc::borrow::Cow;
+use alloc::string::String;
+
+use crate::uts46::*;
+use crate::Errors;
+
+/// Performs preprocessing equivalent to UTS 46 transitional processing
+/// if `transitional` is `true`. If `transitional` is `false`, merely
+/// lets the input pass through as-is (for call site convenience).
+///
+/// The output of this function is to be passed to [`Uts46::process`].
+fn map_transitional(domain: &str, transitional: bool) -> Cow<'_, str> {
+    if !transitional {
+        return Cow::Borrowed(domain);
+    }
+    let mut chars = domain.chars();
+    loop {
+        let prev = chars.clone();
+        if let Some(c) = chars.next() {
+            match c {
+                'ß' | 'ẞ' | 'ς' | '\u{200C}' | '\u{200D}' => {
+                    let mut s = String::with_capacity(domain.len());
+                    let tail = prev.as_str();
+                    let head = &domain[..domain.len() - tail.len()];
+                    s.push_str(head);
+                    for c in tail.chars() {
+                        match c {
+                            'ß' | 'ẞ' => {
+                                s.push_str("ss");
+                            }
+                            'ς' => {
+                                s.push('σ');
+                            }
+                            '\u{200C}' | '\u{200D}' => {}
+                            _ => {
+                                s.push(c);
+                            }
+                        }
+                    }
+                    return Cow::Owned(s);
+                }
+                _ => {}
+            }
+        } else {
+            break;
+        }
+    }
+    Cow::Borrowed(domain)
+}
+
+/// Deprecated. Use the crate-top-level functions or [`Uts46`].
+#[derive(Default)]
+#[deprecated]
+pub struct Idna {
+    config: Config,
+}
+
+impl Idna {
+    pub fn new(config: Config) -> Self {
+        Self { config }
+    }
+
+    /// [UTS 46 ToASCII](http://www.unicode.org/reports/tr46/#ToASCII)
+    #[allow(clippy::wrong_self_convention)] // Retain old weirdness in deprecated API
+    pub fn to_ascii(&mut self, domain: &str, out: &mut String) -> Result<(), Errors> {
+        let mapped = map_transitional(domain, self.config.transitional_processing);
+        match Uts46::new().process(
+            mapped.as_bytes(),
+            self.config.deny_list(),
+            self.config.hyphens(),
+            ErrorPolicy::FailFast, // Old code did not appear to expect the output to be useful in the error case.
+            |_, _, _| false,
+            out,
+            None,
+        ) {
+            Ok(ProcessingSuccess::Passthrough) => {
+                if self.config.verify_dns_length && !verify_dns_length(&mapped, true) {
+                    return Err(crate::Errors::default());
+                }
+                out.push_str(&mapped);
+                Ok(())
+            }
+            Ok(ProcessingSuccess::WroteToSink) => {
+                if self.config.verify_dns_length && !verify_dns_length(out, true) {
+                    return Err(crate::Errors::default());
+                }
+                Ok(())
+            }
+            Err(ProcessingError::ValidityError) => Err(crate::Errors::default()),
+            Err(ProcessingError::SinkError) => unreachable!(),
+        }
+    }
+
+    /// [UTS 46 ToUnicode](http://www.unicode.org/reports/tr46/#ToUnicode)
+    #[allow(clippy::wrong_self_convention)] // Retain old weirdness in deprecated API
+    pub fn to_unicode(&mut self, domain: &str, out: &mut String) -> Result<(), Errors> {
+        let mapped = map_transitional(domain, self.config.transitional_processing);
+        match Uts46::new().process(
+            mapped.as_bytes(),
+            self.config.deny_list(),
+            self.config.hyphens(),
+            ErrorPolicy::MarkErrors,
+            |_, _, _| true,
+            out,
+            None,
+        ) {
+            Ok(ProcessingSuccess::Passthrough) => {
+                out.push_str(&mapped);
+                Ok(())
+            }
+            Ok(ProcessingSuccess::WroteToSink) => Ok(()),
+            Err(ProcessingError::ValidityError) => Err(crate::Errors::default()),
+            Err(ProcessingError::SinkError) => unreachable!(),
+        }
+    }
+}
+
+/// Deprecated configuration API.
+#[derive(Clone, Copy)]
+#[must_use]
+#[deprecated]
+pub struct Config {
+    use_std3_ascii_rules: bool,
+    transitional_processing: bool,
+    verify_dns_length: bool,
+    check_hyphens: bool,
+}
+
+/// The defaults are that of _beStrict=false_ in the [WHATWG URL Standard](https://url.spec.whatwg.org/#idna)
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            use_std3_ascii_rules: false,
+            transitional_processing: false,
+            check_hyphens: false,
+            // Only use for to_ascii, not to_unicode
+            verify_dns_length: false,
+        }
+    }
+}
+
+impl Config {
+    /// Whether to enforce STD3 or WHATWG URL Standard ASCII deny list.
+    ///
+    /// `true` for STD3, `false` for no deny list.
+    ///
+    /// Note that `true` rejects pseudo-hosts used by various TXT record-based protocols.
+    #[inline]
+    pub fn use_std3_ascii_rules(mut self, value: bool) -> Self {
+        self.use_std3_ascii_rules = value;
+        self
+    }
+
+    /// Whether to enable (deprecated) transitional processing.
+    ///
+    /// Note that Firefox, Safari, and Chrome do not use transitional
+    /// processing.
+    #[inline]
+    pub fn transitional_processing(mut self, value: bool) -> Self {
+        self.transitional_processing = value;
+        self
+    }
+
+    /// Whether the _VerifyDNSLength_ operation should be performed
+    /// by `to_ascii`.
+    ///
+    /// For compatibility with previous behavior, even when set to `true`,
+    /// the trailing root label dot is allowed contrary to the spec.
+    #[inline]
+    pub fn verify_dns_length(mut self, value: bool) -> Self {
+        self.verify_dns_length = value;
+        self
+    }
+
+    /// Whether to enforce STD3 rules for hyphen placement.
+    ///
+    /// `true` to deny hyphens in the first and last positions.
+    /// `false` to not enforce hyphen placement.
+    ///
+    /// Note that for backward compatibility this is not the same as
+    /// UTS 46 _CheckHyphens_, which also disallows hyphens in the
+    /// third and fourth positions.
+    ///
+    /// Note that `true` rejects real-world names, including some GitHub user pages.
+    #[inline]
+    pub fn check_hyphens(mut self, value: bool) -> Self {
+        self.check_hyphens = value;
+        self
+    }
+
+    /// Obsolete method retained to ease migration. The argument must be `false`.
+    ///
+    /// Panics
+    ///
+    /// If the argument is `true`.
+    #[inline]
+    #[allow(unused_mut)]
+    pub fn use_idna_2008_rules(mut self, value: bool) -> Self {
+        assert!(!value, "IDNA 2008 rules are no longer supported");
+        self
+    }
+
+    /// Compute the deny list
+    fn deny_list(&self) -> AsciiDenyList {
+        if self.use_std3_ascii_rules {
+            AsciiDenyList::STD3
+        } else {
+            AsciiDenyList::EMPTY
+        }
+    }
+
+    /// Compute the hyphen mode
+    fn hyphens(&self) -> Hyphens {
+        if self.check_hyphens {
+            Hyphens::CheckFirstLast
+        } else {
+            Hyphens::Allow
+        }
+    }
+
+    /// [UTS 46 ToASCII](http://www.unicode.org/reports/tr46/#ToASCII)
+    pub fn to_ascii(self, domain: &str) -> Result<String, Errors> {
+        let mut result = String::with_capacity(domain.len());
+        let mut codec = Idna::new(self);
+        codec.to_ascii(domain, &mut result).map(|()| result)
+    }
+
+    /// [UTS 46 ToUnicode](http://www.unicode.org/reports/tr46/#ToUnicode)
+    pub fn to_unicode(self, domain: &str) -> (String, Result<(), Errors>) {
+        let mut codec = Idna::new(self);
+        let mut out = String::with_capacity(domain.len());
+        let result = codec.to_unicode(domain, &mut out);
+        (out, result)
+    }
+}

vendor/idna/src/lib.rs

@@ -0,0 +1,198 @@
+// Copyright 2016 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.
+
+//! This Rust crate implements IDNA
+//! [per the WHATWG URL Standard](https://url.spec.whatwg.org/#idna).
+//!
+//! It also exposes the underlying algorithms from [*Unicode IDNA Compatibility Processing*
+//! (Unicode Technical Standard #46)](http://www.unicode.org/reports/tr46/)
+//! and [Punycode (RFC 3492)](https://tools.ietf.org/html/rfc3492).
+//!
+//! Quoting from [UTS #46’s introduction](http://www.unicode.org/reports/tr46/#Introduction):
+//!
+//! > Initially, domain names were restricted to ASCII characters.
+//! > A system was introduced in 2003 for internationalized domain names (IDN).
+//! > This system is called Internationalizing Domain Names for Applications,
+//! > or IDNA2003 for short.
+//! > This mechanism supports IDNs by means of a client software transformation
+//! > into a format known as Punycode.
+//! > A revision of IDNA was approved in 2010 (IDNA2008).
+//! > This revision has a number of incompatibilities with IDNA2003.
+//! >
+//! > The incompatibilities force implementers of client software,
+//! > such as browsers and emailers,
+//! > to face difficult choices during the transition period
+//! > as registries shift from IDNA2003 to IDNA2008.
+//! > This document specifies a mechanism
+//! > that minimizes the impact of this transition for client software,
+//! > allowing client software to access domains that are valid under either system.
+#![no_std]
+
+// For forwards compatibility
+#[cfg(feature = "std")]
+extern crate std;
+
+extern crate alloc;
+
+#[cfg(not(feature = "alloc"))]
+compile_error!("the `alloc` feature must be enabled");
+
+// Avoid a breaking change if in the future there's a use case for
+// having a Bring-Your-Own-ICU4X-Data constructor for `Uts46` and
+// not also having compiled data in the binary.
+#[cfg(not(feature = "compiled_data"))]
+compile_error!("the `compiled_data` feature must be enabled");
+
+use alloc::borrow::Cow;
+use alloc::string::String;
+pub use uts46::AsciiDenyList;
+use uts46::Uts46;
+
+mod deprecated;
+pub mod punycode;
+pub mod uts46;
+
+#[allow(deprecated)]
+pub use crate::deprecated::{Config, Idna};
+
+/// Type indicating that there were errors during UTS #46 processing.
+#[derive(Default, Debug)]
+#[non_exhaustive]
+pub struct Errors {}
+
+impl From<Errors> for Result<(), Errors> {
+    fn from(e: Errors) -> Self {
+        Err(e)
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Errors {}
+
+#[cfg(not(feature = "std"))]
+impl core::error::Error for Errors {}
+
+impl core::fmt::Display for Errors {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        core::fmt::Debug::fmt(self, f)
+    }
+}
+
+/// The [domain to ASCII](https://url.spec.whatwg.org/#concept-domain-to-ascii) algorithm;
+/// version returning a `Cow`.
+///
+/// Most applications should be using this function or `domain_to_ascii_from_cow` rather
+/// than the sibling functions, and most applications should pass [`AsciiDenyList::URL`] as
+/// the second argument. Passing [`AsciiDenyList::URL`] as the second argument makes this function also
+/// perform the [forbidden domain code point](https://url.spec.whatwg.org/#forbidden-domain-code-point)
+/// check in addition to the [domain to ASCII](https://url.spec.whatwg.org/#concept-domain-to-ascii)
+/// algorithm.
+///
+/// Returns the ASCII representation a domain name,
+/// normalizing characters (upper-case to lower-case and other kinds of equivalence)
+/// and using Punycode as necessary.
+///
+/// This process may fail.
+///
+/// If you have a `&str` instead of `&[u8]`, just call `.as_bytes()` on it before
+/// passing it to this function. It's still preferable to use this function over
+/// the sibling functions that take `&str`.
+pub fn domain_to_ascii_cow(
+    domain: &[u8],
+    ascii_deny_list: AsciiDenyList,
+) -> Result<Cow<'_, str>, Errors> {
+    Uts46::new().to_ascii(
+        domain,
+        ascii_deny_list,
+        uts46::Hyphens::Allow,
+        uts46::DnsLength::Ignore,
+    )
+}
+
+/// The [domain to ASCII](https://url.spec.whatwg.org/#concept-domain-to-ascii) algorithm;
+/// version accepting and returning a `Cow`.
+///
+/// Most applications should be using this function or `domain_to_ascii_cow` rather
+/// than the sibling functions, and most applications should pass [`AsciiDenyList::URL`] as
+/// the second argument. Passing [`AsciiDenyList::URL`] as the second argument makes this function also
+/// perform the [forbidden domain code point](https://url.spec.whatwg.org/#forbidden-domain-code-point)
+/// check in addition to the [domain to ASCII](https://url.spec.whatwg.org/#concept-domain-to-ascii)
+/// algorithm.
+///
+/// Return the ASCII representation a domain name,
+/// normalizing characters (upper-case to lower-case and other kinds of equivalence)
+/// and using Punycode as necessary.
+///
+/// This process may fail.
+pub fn domain_to_ascii_from_cow(
+    domain: Cow<'_, [u8]>,
+    ascii_deny_list: AsciiDenyList,
+) -> Result<Cow<'_, str>, Errors> {
+    Uts46::new().to_ascii_from_cow(
+        domain,
+        ascii_deny_list,
+        uts46::Hyphens::Allow,
+        uts46::DnsLength::Ignore,
+    )
+}
+
+/// The [domain to ASCII](https://url.spec.whatwg.org/#concept-domain-to-ascii) algorithm;
+/// version returning `String` and no ASCII deny list (i.e. _UseSTD3ASCIIRules=false_).
+///
+/// This function exists for backward-compatibility. Consider using [`domain_to_ascii_cow`]
+/// instead.
+///
+/// Return the ASCII representation a domain name,
+/// normalizing characters (upper-case to lower-case and other kinds of equivalence)
+/// and using Punycode as necessary.
+///
+/// This process may fail.
+pub fn domain_to_ascii(domain: &str) -> Result<String, Errors> {
+    domain_to_ascii_cow(domain.as_bytes(), AsciiDenyList::EMPTY).map(|cow| cow.into_owned())
+}
+
+/// The [domain to ASCII](https://url.spec.whatwg.org/#concept-domain-to-ascii) algorithm,
+/// with the `beStrict` flag set.
+///
+/// Note that this rejects various real-world names including:
+/// * YouTube CDN nodes
+/// * Some GitHub user pages
+/// * Pseudo-hosts used by various TXT record-based protocols.
+pub fn domain_to_ascii_strict(domain: &str) -> Result<String, Errors> {
+    Uts46::new()
+        .to_ascii(
+            domain.as_bytes(),
+            uts46::AsciiDenyList::STD3,
+            uts46::Hyphens::Check,
+            uts46::DnsLength::Verify,
+        )
+        .map(|cow| cow.into_owned())
+}
+
+/// The [domain to Unicode](https://url.spec.whatwg.org/#concept-domain-to-unicode) algorithm;
+/// version returning `String` and no ASCII deny list (i.e. _UseSTD3ASCIIRules=false_).
+///
+/// This function exists for backward-compatibility. Consider using [`Uts46::to_user_interface`]
+/// or [`Uts46::to_unicode`].
+///
+/// Return the Unicode representation of a domain name,
+/// normalizing characters (upper-case to lower-case and other kinds of equivalence)
+/// and decoding Punycode as necessary.
+///
+/// If the second item of the tuple indicates an error, the first item of the tuple
+/// denotes errors using the REPLACEMENT CHARACTERs in order to be able to illustrate
+/// errors to the user. When the second item of the return tuple signals an error,
+/// the first item of the tuple must not be used in a network protocol.
+pub fn domain_to_unicode(domain: &str) -> (String, Result<(), Errors>) {
+    let (cow, result) = Uts46::new().to_unicode(
+        domain.as_bytes(),
+        uts46::AsciiDenyList::EMPTY,
+        uts46::Hyphens::Allow,
+    );
+    (cow.into_owned(), result)
+}

vendor/idna/src/punycode.rs

@@ -0,0 +1,477 @@
+// Copyright 2013 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.
+
+//! Punycode ([RFC 3492](http://tools.ietf.org/html/rfc3492)) implementation.
+//!
+//! Since Punycode fundamentally works on unicode code points,
+//! `encode` and `decode` take and return slices and vectors of `char`.
+//! `encode_str` and `decode_to_string` provide convenience wrappers
+//! that convert from and to Rust’s UTF-8 based `str` and `String` types.
+
+use alloc::{string::String, vec::Vec};
+use core::char;
+use core::fmt::Write;
+use core::marker::PhantomData;
+
+// Bootstring parameters for Punycode
+const BASE: u32 = 36;
+const T_MIN: u32 = 1;
+const T_MAX: u32 = 26;
+const SKEW: u32 = 38;
+const DAMP: u32 = 700;
+const INITIAL_BIAS: u32 = 72;
+const INITIAL_N: u32 = 0x80;
+
+#[inline]
+fn adapt(mut delta: u32, num_points: u32, first_time: bool) -> u32 {
+    delta /= if first_time { DAMP } else { 2 };
+    delta += delta / num_points;
+    let mut k = 0;
+    while delta > ((BASE - T_MIN) * T_MAX) / 2 {
+        delta /= BASE - T_MIN;
+        k += BASE;
+    }
+    k + (((BASE - T_MIN + 1) * delta) / (delta + SKEW))
+}
+
+/// Convert Punycode to an Unicode `String`.
+///
+/// Return None on malformed input or overflow.
+/// Overflow can only happen on inputs that take more than
+/// 63 encoded bytes, the DNS limit on domain name labels.
+#[inline]
+pub fn decode_to_string(input: &str) -> Option<String> {
+    Some(
+        Decoder::default()
+            .decode::<u8, ExternalCaller>(input.as_bytes())
+            .ok()?
+            .collect(),
+    )
+}
+
+/// Convert Punycode to Unicode.
+///
+/// Return None on malformed input or overflow.
+/// Overflow can only happen on inputs that take more than
+/// 63 encoded bytes, the DNS limit on domain name labels.
+pub fn decode(input: &str) -> Option<Vec<char>> {
+    Some(
+        Decoder::default()
+            .decode::<u8, ExternalCaller>(input.as_bytes())
+            .ok()?
+            .collect(),
+    )
+}
+
+/// Marker for internal vs. external caller to retain old API behavior
+/// while tweaking behavior for internal callers.
+///
+/// External callers need overflow checks when encoding, but internal
+/// callers don't, because `PUNYCODE_ENCODE_MAX_INPUT_LENGTH` is set
+/// to 1000, and per RFC 3492 section 6.4, the integer variable does
+/// not need to be able to represent values larger than
+/// (char::MAX - INITIAL_N) * (PUNYCODE_ENCODE_MAX_INPUT_LENGTH + 1),
+/// which is less than u32::MAX.
+///
+/// External callers need to handle upper-case ASCII when decoding,
+/// but internal callers don't, because the internal code calls the
+/// decoder only with lower-case inputs.
+pub(crate) trait PunycodeCaller {
+    const EXTERNAL_CALLER: bool;
+}
+
+pub(crate) struct InternalCaller;
+
+impl PunycodeCaller for InternalCaller {
+    const EXTERNAL_CALLER: bool = false;
+}
+
+struct ExternalCaller;
+
+impl PunycodeCaller for ExternalCaller {
+    const EXTERNAL_CALLER: bool = true;
+}
+
+pub(crate) trait PunycodeCodeUnit {
+    fn is_delimiter(&self) -> bool;
+    fn is_ascii(&self) -> bool;
+    fn digit(&self) -> Option<u32>;
+    fn char(&self) -> char;
+    fn char_ascii_lower_case(&self) -> char;
+}
+
+impl PunycodeCodeUnit for u8 {
+    fn is_delimiter(&self) -> bool {
+        *self == b'-'
+    }
+    fn is_ascii(&self) -> bool {
+        *self < 0x80
+    }
+    fn digit(&self) -> Option<u32> {
+        let byte = *self;
+        Some(match byte {
+            byte @ b'0'..=b'9' => byte - b'0' + 26,
+            byte @ b'A'..=b'Z' => byte - b'A',
+            byte @ b'a'..=b'z' => byte - b'a',
+            _ => return None,
+        } as u32)
+    }
+    fn char(&self) -> char {
+        char::from(*self)
+    }
+    fn char_ascii_lower_case(&self) -> char {
+        char::from(self.to_ascii_lowercase())
+    }
+}
+
+impl PunycodeCodeUnit for char {
+    fn is_delimiter(&self) -> bool {
+        *self == '-'
+    }
+    fn is_ascii(&self) -> bool {
+        debug_assert!(false); // Unused
+        true
+    }
+    fn digit(&self) -> Option<u32> {
+        let byte = *self;
+        Some(match byte {
+            byte @ '0'..='9' => u32::from(byte) - u32::from('0') + 26,
+            // byte @ 'A'..='Z' => u32::from(byte) - u32::from('A'), // XXX not needed if no public input
+            byte @ 'a'..='z' => u32::from(byte) - u32::from('a'),
+            _ => return None,
+        })
+    }
+    fn char(&self) -> char {
+        debug_assert!(false); // Unused
+        *self
+    }
+    fn char_ascii_lower_case(&self) -> char {
+        // No need to actually lower-case!
+        *self
+    }
+}
+
+#[derive(Default)]
+pub(crate) struct Decoder {
+    insertions: smallvec::SmallVec<[(usize, char); 59]>,
+}
+
+impl Decoder {
+    /// Split the input iterator and return a Vec with insertions of encoded characters
+    pub(crate) fn decode<'a, T: PunycodeCodeUnit + Copy, C: PunycodeCaller>(
+        &'a mut self,
+        input: &'a [T],
+    ) -> Result<Decode<'a, T, C>, ()> {
+        self.insertions.clear();
+        // Handle "basic" (ASCII) code points.
+        // They are encoded as-is before the last delimiter, if any.
+        let (base, input) = if let Some(position) = input.iter().rposition(|c| c.is_delimiter()) {
+            (
+                &input[..position],
+                if position > 0 {
+                    &input[position + 1..]
+                } else {
+                    input
+                },
+            )
+        } else {
+            (&input[..0], input)
+        };
+
+        if C::EXTERNAL_CALLER && !base.iter().all(|c| c.is_ascii()) {
+            return Err(());
+        }
+
+        let base_len = base.len();
+        let mut length = base_len as u32;
+        let mut code_point = INITIAL_N;
+        let mut bias = INITIAL_BIAS;
+        let mut i = 0u32;
+        let mut iter = input.iter();
+        loop {
+            let previous_i = i;
+            let mut weight = 1;
+            let mut k = BASE;
+            let mut byte = match iter.next() {
+                None => break,
+                Some(byte) => byte,
+            };
+
+            // Decode a generalized variable-length integer into delta,
+            // which gets added to i.
+            loop {
+                let digit = if let Some(digit) = byte.digit() {
+                    digit
+                } else {
+                    return Err(());
+                };
+                let product = digit.checked_mul(weight).ok_or(())?;
+                i = i.checked_add(product).ok_or(())?;
+                let t = if k <= bias {
+                    T_MIN
+                } else if k >= bias + T_MAX {
+                    T_MAX
+                } else {
+                    k - bias
+                };
+                if digit < t {
+                    break;
+                }
+                weight = weight.checked_mul(BASE - t).ok_or(())?;
+                k += BASE;
+                byte = match iter.next() {
+                    None => return Err(()), // End of input before the end of this delta
+                    Some(byte) => byte,
+                };
+            }
+
+            bias = adapt(i - previous_i, length + 1, previous_i == 0);
+
+            // i was supposed to wrap around from length+1 to 0,
+            // incrementing code_point each time.
+            code_point = code_point.checked_add(i / (length + 1)).ok_or(())?;
+            i %= length + 1;
+            let c = match char::from_u32(code_point) {
+                Some(c) => c,
+                None => return Err(()),
+            };
+
+            // Move earlier insertions farther out in the string
+            for (idx, _) in &mut self.insertions {
+                if *idx >= i as usize {
+                    *idx += 1;
+                }
+            }
+            self.insertions.push((i as usize, c));
+            length += 1;
+            i += 1;
+        }
+
+        self.insertions.sort_by_key(|(i, _)| *i);
+        Ok(Decode {
+            base: base.iter(),
+            insertions: &self.insertions,
+            inserted: 0,
+            position: 0,
+            len: base_len + self.insertions.len(),
+            phantom: PhantomData::<C>,
+        })
+    }
+}
+
+pub(crate) struct Decode<'a, T, C>
+where
+    T: PunycodeCodeUnit + Copy,
+    C: PunycodeCaller,
+{
+    base: core::slice::Iter<'a, T>,
+    pub(crate) insertions: &'a [(usize, char)],
+    inserted: usize,
+    position: usize,
+    len: usize,
+    phantom: PhantomData<C>,
+}
+
+impl<T: PunycodeCodeUnit + Copy, C: PunycodeCaller> Iterator for Decode<'_, T, C> {
+    type Item = char;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        loop {
+            match self.insertions.get(self.inserted) {
+                Some((pos, c)) if *pos == self.position => {
+                    self.inserted += 1;
+                    self.position += 1;
+                    return Some(*c);
+                }
+                _ => {}
+            }
+            if let Some(c) = self.base.next() {
+                self.position += 1;
+                return Some(if C::EXTERNAL_CALLER {
+                    c.char()
+                } else {
+                    c.char_ascii_lower_case()
+                });
+            } else if self.inserted >= self.insertions.len() {
+                return None;
+            }
+        }
+    }
+
+    fn size_hint(&self) -> (usize, Option<usize>) {
+        let len = self.len - self.position;
+        (len, Some(len))
+    }
+}
+
+impl<T: PunycodeCodeUnit + Copy, C: PunycodeCaller> ExactSizeIterator for Decode<'_, T, C> {
+    fn len(&self) -> usize {
+        self.len - self.position
+    }
+}
+
+/// Convert an Unicode `str` to Punycode.
+///
+/// This is a convenience wrapper around `encode`.
+#[inline]
+pub fn encode_str(input: &str) -> Option<String> {
+    if input.len() > u32::MAX as usize {
+        return None;
+    }
+    let mut buf = String::with_capacity(input.len());
+    encode_into::<_, _, ExternalCaller>(input.chars(), &mut buf)
+        .ok()
+        .map(|()| buf)
+}
+
+/// Convert Unicode to Punycode.
+///
+/// Return None on overflow, which can only happen on inputs that would take more than
+/// 63 encoded bytes, the DNS limit on domain name labels.
+pub fn encode(input: &[char]) -> Option<String> {
+    if input.len() > u32::MAX as usize {
+        return None;
+    }
+    let mut buf = String::with_capacity(input.len());
+    encode_into::<_, _, ExternalCaller>(input.iter().copied(), &mut buf)
+        .ok()
+        .map(|()| buf)
+}
+
+pub(crate) enum PunycodeEncodeError {
+    Overflow,
+    Sink,
+}
+
+impl From<core::fmt::Error> for PunycodeEncodeError {
+    fn from(_: core::fmt::Error) -> Self {
+        Self::Sink
+    }
+}
+
+pub(crate) fn encode_into<I, W, C>(input: I, output: &mut W) -> Result<(), PunycodeEncodeError>
+where
+    I: Iterator<Item = char> + Clone,
+    W: Write + ?Sized,
+    C: PunycodeCaller,
+{
+    // Handle "basic" (ASCII) code points. They are encoded as-is.
+    let (mut input_length, mut basic_length) = (0u32, 0);
+    for c in input.clone() {
+        input_length = input_length
+            .checked_add(1)
+            .ok_or(PunycodeEncodeError::Overflow)?;
+        if c.is_ascii() {
+            output.write_char(c)?;
+            basic_length += 1;
+        }
+    }
+
+    if !C::EXTERNAL_CALLER {
+        // We should never get an overflow here with the internal caller being
+        // length-limited, but let's check anyway once here trusting the math
+        // from  RFC 3492 section 6.4 and then omit the overflow checks in the
+        // loop below.
+        let len_plus_one = input_length
+            .checked_add(1)
+            .ok_or(PunycodeEncodeError::Overflow)?;
+        len_plus_one
+            .checked_mul(u32::from(char::MAX) - INITIAL_N)
+            .ok_or(PunycodeEncodeError::Overflow)?;
+    }
+
+    if basic_length > 0 {
+        output.write_char('-')?;
+    }
+    let mut code_point = INITIAL_N;
+    let mut delta = 0u32;
+    let mut bias = INITIAL_BIAS;
+    let mut processed = basic_length;
+    while processed < input_length {
+        // All code points < code_point have been handled already.
+        // Find the next larger one.
+        let min_code_point = input
+            .clone()
+            .map(|c| c as u32)
+            .filter(|&c| c >= code_point)
+            .min()
+            .unwrap();
+        // Increase delta to advance the decoder’s <code_point,i> state to <min_code_point,0>
+        if C::EXTERNAL_CALLER {
+            let product = (min_code_point - code_point)
+                .checked_mul(processed + 1)
+                .ok_or(PunycodeEncodeError::Overflow)?;
+            delta = delta
+                .checked_add(product)
+                .ok_or(PunycodeEncodeError::Overflow)?;
+        } else {
+            delta += (min_code_point - code_point) * (processed + 1);
+        }
+        code_point = min_code_point;
+        for c in input.clone() {
+            let c = c as u32;
+            if c < code_point {
+                if C::EXTERNAL_CALLER {
+                    delta = delta.checked_add(1).ok_or(PunycodeEncodeError::Overflow)?;
+                } else {
+                    delta += 1;
+                }
+            }
+            if c == code_point {
+                // Represent delta as a generalized variable-length integer:
+                let mut q = delta;
+                let mut k = BASE;
+                loop {
+                    let t = if k <= bias {
+                        T_MIN
+                    } else if k >= bias + T_MAX {
+                        T_MAX
+                    } else {
+                        k - bias
+                    };
+                    if q < t {
+                        break;
+                    }
+                    let value = t + ((q - t) % (BASE - t));
+                    output.write_char(value_to_digit(value))?;
+                    q = (q - t) / (BASE - t);
+                    k += BASE;
+                }
+                output.write_char(value_to_digit(q))?;
+                bias = adapt(delta, processed + 1, processed == basic_length);
+                delta = 0;
+                processed += 1;
+            }
+        }
+        delta += 1;
+        code_point += 1;
+    }
+    Ok(())
+}
+
+#[inline]
+fn value_to_digit(value: u32) -> char {
+    match value {
+        0..=25 => (value as u8 + b'a') as char,       // a..z
+        26..=35 => (value as u8 - 26 + b'0') as char, // 0..9
+        _ => panic!(),
+    }
+}
+
+#[test]
+#[ignore = "slow"]
+#[cfg(target_pointer_width = "64")]
+fn huge_encode() {
+    let mut buf = String::new();
+    assert!(encode_into::<_, _, ExternalCaller>(
+        core::iter::repeat('ß').take(u32::MAX as usize + 1),
+        &mut buf
+    )
+    .is_err());
+    assert_eq!(buf.len(), 0);
+}

vendor/idna/target/package/tmp-registry/index/id/na/idna

@@ -0,0 +1 @@
+{"name":"idna","vers":"1.1.0","deps":[{"name":"idna_adapter","req":"^1","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"smallvec","req":"^1.13.1","features":["const_generics"],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"utf8_iter","req":"^1.0.4","features":[],"optional":false,"default_features":true,"target":null,"kind":"normal","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"assert_matches","req":"^1.3","features":[],"optional":false,"default_features":true,"target":null,"kind":"dev","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"bencher","req":"^0.1","features":[],"optional":false,"default_features":true,"target":null,"kind":"dev","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"serde_json","req":"^1.0","features":[],"optional":false,"default_features":true,"target":null,"kind":"dev","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false},{"name":"tester","req":"^0.9","features":[],"optional":false,"default_features":true,"target":null,"kind":"dev","registry":"https://github.com/rust-lang/crates.io-index","package":null,"public":null,"artifact":null,"bindep_target":null,"lib":false}],"features":{"alloc":[],"compiled_data":["idna_adapter/compiled_data"],"default":["std","compiled_data"],"std":["alloc"]},"features2":null,"cksum":"afdf4f3badf8f43369b803b8f3a51508a3c52749c3ea592c18acb9de827bad3b","yanked":null,"links":null,"rust_version":null,"v":2}

vendor/idna/tests/deprecated.rs

@@ -0,0 +1,197 @@
+// 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.
+
+#![allow(clippy::assigning_clones)]
+#![allow(deprecated)]
+
+use crate::test::TestFn;
+use std::char;
+use std::fmt::Write;
+
+use idna::Errors;
+
+pub fn collect_tests<F: FnMut(String, TestFn)>(add_test: &mut F) {
+    // https://www.unicode.org/Public/idna/13.0.0/IdnaTestV2.txt
+    for (i, line) in include_str!("IdnaTestV2.txt").lines().enumerate() {
+        if line.is_empty() || line.starts_with('#') {
+            continue;
+        }
+
+        // Remove comments
+        let line = match line.find('#') {
+            Some(index) => &line[0..index],
+            None => line,
+        };
+
+        let mut pieces = line.split(';').map(|x| x.trim()).collect::<Vec<&str>>();
+        let source = unescape(pieces.remove(0));
+
+        // ToUnicode
+        let mut to_unicode = unescape(pieces.remove(0));
+        if to_unicode.is_empty() {
+            to_unicode = source.clone();
+        }
+        let to_unicode_status = status(pieces.remove(0));
+
+        // ToAsciiN
+        let to_ascii_n = pieces.remove(0);
+        let to_ascii_n = if to_ascii_n.is_empty() {
+            to_unicode.clone()
+        } else {
+            to_ascii_n.to_owned()
+        };
+        let to_ascii_n_status = pieces.remove(0);
+        let to_ascii_n_status = if to_ascii_n_status.is_empty() {
+            to_unicode_status.clone()
+        } else {
+            status(to_ascii_n_status)
+        };
+
+        // ToAsciiT
+        let to_ascii_t = pieces.remove(0);
+        let to_ascii_t = if to_ascii_t.is_empty() {
+            to_ascii_n.clone()
+        } else {
+            to_ascii_t.to_owned()
+        };
+        let to_ascii_t_status = pieces.remove(0);
+        let to_ascii_t_status = if to_ascii_t_status.is_empty() {
+            to_ascii_n_status.clone()
+        } else {
+            status(to_ascii_t_status)
+        };
+
+        let test_name = format!("UTS #46 (deprecated API) line {}", i + 1);
+        add_test(
+            test_name,
+            TestFn::DynTestFn(Box::new(move || {
+                let config = idna::Config::default()
+                    .use_std3_ascii_rules(true)
+                    .verify_dns_length(true)
+                    .check_hyphens(true);
+
+                // http://unicode.org/reports/tr46/#Deviations
+                // applications that perform IDNA2008 lookup are not required to check
+                // for these contexts, so we skip all tests annotated with C*
+
+                // Everybody ignores V2
+                // https://github.com/servo/rust-url/pull/240
+                // https://github.com/whatwg/url/issues/53#issuecomment-181528158
+                // http://www.unicode.org/review/pri317/
+
+                // "The special error codes X3 and X4_2 are now returned where a toASCII error code
+                // was formerly being generated in toUnicode due to an empty label."
+                // This is not implemented yet, so we skip toUnicode X4_2 tests for now, too.
+
+                let (to_unicode_value, to_unicode_result) =
+                    config.transitional_processing(false).to_unicode(&source);
+                let to_unicode_result = to_unicode_result.map(|()| to_unicode_value);
+                check(
+                    &source,
+                    (&to_unicode, &to_unicode_status),
+                    to_unicode_result,
+                    |e| e == "X4_2" || e == "V2",
+                );
+
+                let to_ascii_n_result = config.transitional_processing(false).to_ascii(&source);
+                check(
+                    &source,
+                    (&to_ascii_n, &to_ascii_n_status),
+                    to_ascii_n_result,
+                    |e| e == "V2" || e == "A4_2",
+                );
+
+                let to_ascii_t_result = config.transitional_processing(true).to_ascii(&source);
+                check(
+                    &source,
+                    (&to_ascii_t, &to_ascii_t_status),
+                    to_ascii_t_result,
+                    |e| e == "V2" || e == "A4_2",
+                );
+            })),
+        )
+    }
+}
+
+#[allow(clippy::redundant_clone)]
+fn check<F>(source: &str, expected: (&str, &[&str]), actual: Result<String, Errors>, ignore: F)
+where
+    F: Fn(&str) -> bool,
+{
+    if !expected.1.is_empty() {
+        if !expected.1.iter().copied().any(ignore) {
+            let res = actual.ok();
+            assert_eq!(
+                res.clone(),
+                None,
+                "Expected error {:?}. result: {} | source: {}",
+                expected.1,
+                res.unwrap(),
+                source,
+            );
+        }
+    } else {
+        assert!(
+            actual.is_ok(),
+            "Couldn't parse {} | error: {:?}",
+            source,
+            actual.err().unwrap(),
+        );
+        assert_eq!(actual.unwrap(), expected.0, "source: {}", source);
+    }
+}
+
+fn unescape(input: &str) -> String {
+    let mut output = String::new();
+    let mut chars = input.chars();
+    loop {
+        match chars.next() {
+            None => return output,
+            Some(c) => {
+                if c == '\\' {
+                    match chars.next().unwrap() {
+                        '\\' => output.push('\\'),
+                        'u' => {
+                            let c1 = chars.next().unwrap().to_digit(16).unwrap();
+                            let c2 = chars.next().unwrap().to_digit(16).unwrap();
+                            let c3 = chars.next().unwrap().to_digit(16).unwrap();
+                            let c4 = chars.next().unwrap().to_digit(16).unwrap();
+                            match char::from_u32(((c1 * 16 + c2) * 16 + c3) * 16 + c4) {
+                                Some(c) => output.push(c),
+                                None => {
+                                    write!(&mut output, "\\u{:X}{:X}{:X}{:X}", c1, c2, c3, c4)
+                                        .expect("Could not write to output");
+                                }
+                            };
+                        }
+                        _ => panic!("Invalid test data input"),
+                    }
+                } else {
+                    output.push(c);
+                }
+            }
+        }
+    }
+}
+
+fn status(status: &str) -> Vec<&str> {
+    if status.is_empty() || status == "[]" {
+        return Vec::new();
+    }
+
+    let mut result = status.split(", ").collect::<Vec<_>>();
+    assert!(result[0].starts_with('['));
+    result[0] = &result[0][1..];
+
+    let idx = result.len() - 1;
+    let last = &mut result[idx];
+    assert!(last.ends_with(']'));
+    *last = &last[..last.len() - 1];
+
+    result
+}

vendor/idna/tests/punycode.rs

@@ -0,0 +1,125 @@
+// Copyright 2013 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.
+
+use crate::test::TestFn;
+use idna::punycode::{decode, decode_to_string, encode_str};
+use serde_json::map::Map;
+use serde_json::Value;
+use std::panic::catch_unwind;
+use std::str::FromStr;
+
+fn one_test(decoded: &str, encoded: &str) {
+    match decode(encoded) {
+        None => panic!("Decoding {} failed.", encoded),
+        Some(result) => {
+            let result = result.into_iter().collect::<String>();
+            assert!(
+                result == decoded,
+                "Incorrect decoding of \"{}\":\n   \"{}\"\n!= \"{}\"\n",
+                encoded,
+                result,
+                decoded
+            )
+        }
+    }
+
+    match decode_to_string(encoded) {
+        None => panic!("Decoding {} failed.", encoded),
+        Some(result) => assert!(
+            result == decoded,
+            "Incorrect decoding of \"{}\":\n   \"{}\"\n!= \"{}\"\n",
+            encoded,
+            result,
+            decoded
+        ),
+    }
+
+    match encode_str(decoded) {
+        None => panic!("Encoding {} failed.", decoded),
+        Some(result) => assert!(
+            result == encoded,
+            "Incorrect encoding of \"{}\":\n   \"{}\"\n!= \"{}\"\n",
+            decoded,
+            result,
+            encoded
+        ),
+    }
+}
+
+fn one_bad_test(encode: &str) {
+    let result = catch_unwind(|| encode_str(encode));
+    assert!(
+        matches!(&result, Ok(None)),
+        "Should neither panic nor return Some result, but got {:?}",
+        result
+    )
+}
+
+fn get_string<'a>(map: &'a Map<String, Value>, key: &str) -> &'a str {
+    match map.get(&key.to_string()) {
+        Some(Value::String(s)) => s,
+        None => "",
+        _ => panic!(),
+    }
+}
+
+pub fn collect_tests<F: FnMut(String, TestFn)>(add_test: &mut F) {
+    match Value::from_str(include_str!("punycode_tests.json")) {
+        Ok(Value::Array(tests)) => {
+            for (i, test) in tests.into_iter().enumerate() {
+                match test {
+                    Value::Object(o) => {
+                        let test_name = {
+                            let desc = get_string(&o, "description");
+                            if desc.is_empty() {
+                                format!("Punycode {}", i + 1)
+                            } else {
+                                format!("Punycode {}: {}", i + 1, desc)
+                            }
+                        };
+                        add_test(
+                            test_name,
+                            TestFn::DynTestFn(Box::new(move || {
+                                one_test(get_string(&o, "decoded"), get_string(&o, "encoded"))
+                            })),
+                        )
+                    }
+                    _ => panic!(),
+                }
+            }
+        }
+        other => panic!("{:?}", other),
+    }
+
+    match Value::from_str(include_str!("bad_punycode_tests.json")) {
+        Ok(Value::Array(tests)) => {
+            for (i, test) in tests.into_iter().enumerate() {
+                match test {
+                    Value::Object(o) => {
+                        let test_name = {
+                            let desc = get_string(&o, "description");
+                            if desc.is_empty() {
+                                format!("Bad Punycode {}", i + 1)
+                            } else {
+                                format!("Bad Punycode {}: {}", i + 1, desc)
+                            }
+                        };
+                        add_test(
+                            test_name,
+                            TestFn::DynTestFn(Box::new(move || {
+                                one_bad_test(get_string(&o, "decoded"))
+                            })),
+                        )
+                    }
+                    _ => panic!(),
+                }
+            }
+        }
+        other => panic!("{:?}", other),
+    }
+}

vendor/idna/tests/punycode_tests.json

@@ -0,0 +1,120 @@
+[
+{
+    "description": "These tests are copied from https://github.com/mathiasbynens/punycode.js/blob/main/tests/tests.js , used under the MIT license.",
+    "decoded": "",
+    "encoded": ""
+},
+{
+    "description": "a single basic code point",
+    "decoded": "Bach",
+    "encoded": "Bach-"
+},
+{
+    "description": "a single non-ASCII character",
+    "decoded": "\u00FC",
+    "encoded": "tda"
+},
+{
+    "description": "multiple non-ASCII characters",
+    "decoded": "\u00FC\u00EB\u00E4\u00F6\u2665",
+    "encoded": "4can8av2009b"
+},
+{
+    "description": "mix of ASCII and non-ASCII characters",
+    "decoded": "b\u00FCcher",
+    "encoded": "bcher-kva"
+},
+{
+    "description": "long string with both ASCII and non-ASCII characters",
+    "decoded": "Willst du die Bl\u00FCthe des fr\u00FChen, die Fr\u00FCchte des sp\u00E4teren Jahres",
+    "encoded": "Willst du die Blthe des frhen, die Frchte des spteren Jahres-x9e96lkal"
+},
+{
+    "description": "Arabic (Egyptian)",
+    "decoded": "\u0644\u064A\u0647\u0645\u0627\u0628\u062A\u0643\u0644\u0645\u0648\u0634\u0639\u0631\u0628\u064A\u061F",
+    "encoded": "egbpdaj6bu4bxfgehfvwxn"
+},
+{
+    "description": "Chinese (simplified)",
+    "decoded": "\u4ED6\u4EEC\u4E3A\u4EC0\u4E48\u4E0D\u8BF4\u4E2d\u6587",
+    "encoded": "ihqwcrb4cv8a8dqg056pqjye"
+},
+{
+    "description": "Chinese (traditional)",
+    "decoded": "\u4ED6\u5011\u7232\u4EC0\u9EBD\u4E0D\u8AAA\u4E2D\u6587",
+    "encoded": "ihqwctvzc91f659drss3x8bo0yb"
+},
+{
+    "description": "Czech",
+    "decoded": "Pro\u010Dprost\u011Bnemluv\u00ED\u010Desky",
+    "encoded": "Proprostnemluvesky-uyb24dma41a"
+},
+{
+    "description": "Hebrew",
+    "decoded": "\u05DC\u05DE\u05D4\u05D4\u05DD\u05E4\u05E9\u05D5\u05D8\u05DC\u05D0\u05DE\u05D3\u05D1\u05E8\u05D9\u05DD\u05E2\u05D1\u05E8\u05D9\u05EA",
+    "encoded": "4dbcagdahymbxekheh6e0a7fei0b"
+},
+{
+    "description": "Hindi (Devanagari)",
+    "decoded": "\u092F\u0939\u0932\u094B\u0917\u0939\u093F\u0928\u094D\u0926\u0940\u0915\u094D\u092F\u094B\u0902\u0928\u0939\u0940\u0902\u092C\u094B\u0932\u0938\u0915\u0924\u0947\u0939\u0948\u0902",
+    "encoded": "i1baa7eci9glrd9b2ae1bj0hfcgg6iyaf8o0a1dig0cd"
+},
+{
+    "description": "Japanese (kanji and hiragana)",
+    "decoded": "\u306A\u305C\u307F\u3093\u306A\u65E5\u672C\u8A9E\u3092\u8A71\u3057\u3066\u304F\u308C\u306A\u3044\u306E\u304B",
+    "encoded": "n8jok5ay5dzabd5bym9f0cm5685rrjetr6pdxa"
+},
+{
+    "description": "Korean (Hangul syllables)",
+    "decoded": "\uC138\uACC4\uC758\uBAA8\uB4E0\uC0AC\uB78C\uB4E4\uC774\uD55C\uAD6D\uC5B4\uB97C\uC774\uD574\uD55C\uB2E4\uBA74\uC5BC\uB9C8\uB098\uC88B\uC744\uAE4C",
+    "encoded": "989aomsvi5e83db1d2a355cv1e0vak1dwrv93d5xbh15a0dt30a5jpsd879ccm6fea98c"
+},
+{
+    "description": "Russian (Cyrillic)",
+    "decoded": "\u043F\u043E\u0447\u0435\u043C\u0443\u0436\u0435\u043E\u043D\u0438\u043D\u0435\u0433\u043E\u0432\u043E\u0440\u044F\u0442\u043F\u043E\u0440\u0443\u0441\u0441\u043A\u0438",
+    "encoded": "b1abfaaepdrnnbgefbadotcwatmq2g4l"
+},
+{
+    "description": "Spanish",
+    "decoded": "Porqu\u00E9nopuedensimplementehablarenEspa\u00F1ol",
+    "encoded": "PorqunopuedensimplementehablarenEspaol-fmd56a"
+},
+{
+    "description": "Vietnamese",
+    "decoded": "T\u1EA1isaoh\u1ECDkh\u00F4ngth\u1EC3ch\u1EC9n\u00F3iti\u1EBFngVi\u1EC7t",
+    "encoded": "TisaohkhngthchnitingVit-kjcr8268qyxafd2f1b9g"
+},
+{
+    "decoded": "3\u5E74B\u7D44\u91D1\u516B\u5148\u751F",
+    "encoded": "3B-ww4c5e180e575a65lsy2b"
+},
+{
+    "decoded": "\u5B89\u5BA4\u5948\u7F8E\u6075-with-SUPER-MONKEYS",
+    "encoded": "-with-SUPER-MONKEYS-pc58ag80a8qai00g7n9n"
+},
+{
+    "decoded": "Hello-Another-Way-\u305D\u308C\u305E\u308C\u306E\u5834\u6240",
+    "encoded": "Hello-Another-Way--fc4qua05auwb3674vfr0b"
+},
+{
+    "decoded": "\u3072\u3068\u3064\u5C4B\u6839\u306E\u4E0B2",
+    "encoded": "2-u9tlzr9756bt3uc0v"
+},
+{
+    "decoded": "Maji\u3067Koi\u3059\u308B5\u79D2\u524D",
+    "encoded": "MajiKoi5-783gue6qz075azm5e"
+},
+{
+    "decoded": "\u30D1\u30D5\u30A3\u30FCde\u30EB\u30F3\u30D0",
+    "encoded": "de-jg4avhby1noc0d"
+},
+{
+    "decoded": "\u305D\u306E\u30B9\u30D4\u30FC\u30C9\u3067",
+    "encoded": "d9juau41awczczp"
+},
+{
+    "description": "ASCII string that breaks the existing rules for host-name labels (It's not a realistic example for IDNA, because IDNA never encodes pure ASCII labels.)",
+    "decoded": "-> $1.00 <-",
+    "encoded": "-> $1.00 <--"
+}
+]

vendor/idna/tests/tests.rs

@@ -0,0 +1,27 @@
+use tester as test;
+
+mod deprecated;
+mod punycode;
+mod uts46;
+
+fn main() {
+    let mut tests = Vec::new();
+    {
+        let mut add_test = |name, run| {
+            tests.push(test::TestDescAndFn {
+                desc: test::TestDesc {
+                    name: test::DynTestName(name),
+                    ignore: false,
+                    should_panic: test::ShouldPanic::No,
+                    allow_fail: false,
+                    test_type: test::TestType::Unknown,
+                },
+                testfn: run,
+            })
+        };
+        punycode::collect_tests(&mut add_test);
+        deprecated::collect_tests(&mut add_test);
+        uts46::collect_tests(&mut add_test);
+    }
+    test::test_main(&std::env::args().collect::<Vec<_>>(), tests, None)
+}

vendor/idna/tests/unit.rs

@@ -0,0 +1,140 @@
+#![allow(deprecated)]
+
+use assert_matches::assert_matches;
+
+/// https://github.com/servo/rust-url/issues/373
+#[test]
+fn test_punycode_prefix_with_length_check() {
+    let config = idna::Config::default()
+        .verify_dns_length(true)
+        .check_hyphens(true)
+        .use_std3_ascii_rules(true);
+
+    assert!(config.to_ascii("xn--").is_err());
+    assert!(config.to_ascii("xn---").is_err());
+    assert!(config.to_ascii("xn-----").is_err());
+    assert!(config.to_ascii("xn--.").is_err());
+    assert!(config.to_ascii("xn--...").is_err());
+    assert!(config.to_ascii(".xn--").is_err());
+    assert!(config.to_ascii("...xn--").is_err());
+    assert!(config.to_ascii("xn--.xn--").is_err());
+    assert!(config.to_ascii("xn--.example.org").is_err());
+}
+
+/// https://github.com/servo/rust-url/issues/373
+#[test]
+fn test_punycode_prefix_without_length_check() {
+    let config = idna::Config::default()
+        .verify_dns_length(false)
+        .check_hyphens(true)
+        .use_std3_ascii_rules(true);
+
+    assert!(config.to_ascii("xn--").is_err());
+    assert!(config.to_ascii("xn---").is_err());
+    assert!(config.to_ascii("xn-----").is_err());
+    assert!(config.to_ascii("xn--.").is_err());
+    assert!(config.to_ascii("xn--...").is_err());
+    assert!(config.to_ascii(".xn--").is_err());
+    assert!(config.to_ascii("...xn--").is_err());
+    assert!(config.to_ascii("xn--.xn--").is_err());
+    assert!(config.to_ascii("xn--.example.org").is_err());
+}
+
+#[test]
+fn test_punycode_invalid_encoding() {
+    let config = idna::Config::default();
+    assert!(config.to_ascii("xn--55555577").is_err());
+}
+
+// http://www.unicode.org/reports/tr46/#Table_Example_Processing
+#[test]
+fn test_examples() {
+    let mut codec = idna::Idna::default();
+    let mut out = String::new();
+
+    assert_matches!(codec.to_unicode("Bloß.de", &mut out), Ok(()));
+    assert_eq!(out, "bloß.de");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--blo-7ka.de", &mut out), Ok(()));
+    assert_eq!(out, "bloß.de");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("u\u{308}.com", &mut out), Ok(()));
+    assert_eq!(out, "ü.com");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--tda.com", &mut out), Ok(()));
+    assert_eq!(out, "ü.com");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--u-ccb.com", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("a⒈com", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--a-ecp.ru", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--0.pt", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("日本語。ＪＰ", &mut out), Ok(()));
+    assert_eq!(out, "日本語.jp");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("☕.us", &mut out), Ok(()));
+    assert_eq!(out, "☕.us");
+}
+
+#[test]
+fn test_v5() {
+    let config = idna::Config::default()
+        .verify_dns_length(true)
+        .use_std3_ascii_rules(true)
+        .check_hyphens(true);
+
+    // IdnaTest:784 蔏｡𑰺
+    assert!(config.to_ascii("\u{11C3A}").is_err());
+    assert!(config.to_ascii("\u{850f}.\u{11C3A}").is_err());
+    assert!(config.to_ascii("\u{850f}\u{ff61}\u{11C3A}").is_err());
+}
+
+#[test]
+fn test_v8_bidi_rules() {
+    let config = idna::Config::default()
+        .verify_dns_length(true)
+        .use_std3_ascii_rules(true)
+        .check_hyphens(true);
+
+    assert_eq!(config.to_ascii("abc").unwrap(), "abc");
+    assert_eq!(config.to_ascii("123").unwrap(), "123");
+    assert_eq!(config.to_ascii("אבּג").unwrap(), "xn--kdb3bdf");
+    assert_eq!(config.to_ascii("ابج").unwrap(), "xn--mgbcm");
+    assert_eq!(config.to_ascii("abc.ابج").unwrap(), "abc.xn--mgbcm");
+    assert_eq!(config.to_ascii("אבּג.ابج").unwrap(), "xn--kdb3bdf.xn--mgbcm");
+
+    // Bidi domain names cannot start with digits
+    assert!(config.to_ascii("0a.\u{05D0}").is_err());
+    assert!(config.to_ascii("0à.\u{05D0}").is_err());
+
+    // Bidi chars may be punycode-encoded
+    assert!(config.to_ascii("xn--0ca24w").is_err());
+}
+
+#[test]
+fn emoji_domains() {
+    // HOT BEVERAGE is allowed here...
+    let config = idna::Config::default()
+        .verify_dns_length(true)
+        .use_std3_ascii_rules(true)
+        .check_hyphens(true);
+    assert_eq!(config.to_ascii("☕.com").unwrap(), "xn--53h.com");
+}
+
+#[test]
+fn unicode_before_delimiter() {
+    let config = idna::Config::default();
+    assert!(config.to_ascii("xn--f\u{34a}-PTP").is_err());
+}

vendor/idna/tests/unitbis.rs

@@ -0,0 +1,374 @@
+use idna::uts46::AsciiDenyList;
+use idna::uts46::DnsLength;
+use idna::uts46::Hyphens;
+
+/// https://github.com/servo/rust-url/issues/373
+#[test]
+fn test_punycode_prefix_with_length_check() {
+    let config = idna::uts46::Uts46::new();
+
+    assert!(config
+        .to_ascii(
+            b"xn--",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn---",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn-----",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--.",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--...",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b".xn--",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"...xn--",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--.xn--",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--.example.org",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+}
+
+/// https://github.com/servo/rust-url/issues/373
+#[test]
+fn test_punycode_prefix_without_length_check() {
+    let config = idna::uts46::Uts46::new();
+
+    assert!(config
+        .to_ascii(
+            b"xn--",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn---",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn-----",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--.",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--...",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b".xn--",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"...xn--",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--.xn--",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            b"xn--.example.org",
+            AsciiDenyList::URL,
+            Hyphens::Allow,
+            DnsLength::Ignore
+        )
+        .is_err());
+}
+/*
+// http://www.unicode.org/reports/tr46/#Table_Example_Processing
+#[test]
+fn test_examples() {
+    let codec = idna::uts46bis::Uts46::new();
+    let mut out = String::new();
+
+    assert_matches!(codec.to_unicode("Bloß.de", &mut out), Ok(()));
+    assert_eq!(out, "bloß.de");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--blo-7ka.de", &mut out), Ok(()));
+    assert_eq!(out, "bloß.de");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("u\u{308}.com", &mut out), Ok(()));
+    assert_eq!(out, "ü.com");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--tda.com", &mut out), Ok(()));
+    assert_eq!(out, "ü.com");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--u-ccb.com", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("a⒈com", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--a-ecp.ru", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("xn--0.pt", &mut out), Err(_));
+
+    out.clear();
+    assert_matches!(codec.to_unicode("日本語。ＪＰ", &mut out), Ok(()));
+    assert_eq!(out, "日本語.jp");
+
+    out.clear();
+    assert_matches!(codec.to_unicode("☕.us", &mut out), Ok(()));
+    assert_eq!(out, "☕.us");
+}
+*/
+
+#[test]
+fn test_v5() {
+    let config = idna::uts46::Uts46::new();
+
+    // IdnaTest:784 蔏｡𑰺
+    assert!(config
+        .to_ascii(
+            "\u{11C3A}".as_bytes(),
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            "\u{850f}.\u{11C3A}".as_bytes(),
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            "\u{850f}\u{ff61}\u{11C3A}".as_bytes(),
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+}
+
+#[test]
+fn test_v8_bidi_rules() {
+    let config = idna::uts46::Uts46::new();
+
+    assert_eq!(
+        config
+            .to_ascii(
+                b"abc",
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "abc"
+    );
+    assert_eq!(
+        config
+            .to_ascii(
+                b"123",
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "123"
+    );
+    assert_eq!(
+        config
+            .to_ascii(
+                "אבּג".as_bytes(),
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "xn--kdb3bdf"
+    );
+    assert_eq!(
+        config
+            .to_ascii(
+                "ابج".as_bytes(),
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "xn--mgbcm"
+    );
+    assert_eq!(
+        config
+            .to_ascii(
+                "abc.ابج".as_bytes(),
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "abc.xn--mgbcm"
+    );
+    assert_eq!(
+        config
+            .to_ascii(
+                "אבּג.ابج".as_bytes(),
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "xn--kdb3bdf.xn--mgbcm"
+    );
+
+    // Bidi domain names cannot start with digits
+    assert!(config
+        .to_ascii(
+            "0a.\u{05D0}".as_bytes(),
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+    assert!(config
+        .to_ascii(
+            "0à.\u{05D0}".as_bytes(),
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+
+    // Bidi chars may be punycode-encoded
+    assert!(config
+        .to_ascii(
+            b"xn--0ca24w",
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+}
+
+#[test]
+fn emoji_domains() {
+    // HOT BEVERAGE is allowed here...
+    let config = idna::uts46::Uts46::new();
+    assert_eq!(
+        config
+            .to_ascii(
+                "☕.com".as_bytes(),
+                AsciiDenyList::STD3,
+                Hyphens::Check,
+                DnsLength::Verify,
+            )
+            .unwrap(),
+        "xn--53h.com"
+    );
+}
+
+#[test]
+fn unicode_before_delimiter() {
+    let config = idna::uts46::Uts46::new();
+    assert!(config
+        .to_ascii(
+            "xn--f\u{34a}-PTP".as_bytes(),
+            AsciiDenyList::STD3,
+            Hyphens::Check,
+            DnsLength::Verify,
+        )
+        .is_err());
+}
+
+#[test]
+fn upper_case_ascii_in_punycode() {
+    let config = idna::uts46::Uts46::new();
+    let (unicode, result) =
+        config.to_unicode("xn--A-1ga".as_bytes(), AsciiDenyList::STD3, Hyphens::Check);
+    assert!(result.is_ok());
+    assert_eq!(&unicode, "aö");
+}

vendor/idna/tests/uts46.rs

@@ -0,0 +1,239 @@
+// 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.
+
+#![allow(clippy::assigning_clones)]
+
+use crate::test::TestFn;
+use std::char;
+use std::fmt::Write;
+
+use idna::uts46::verify_dns_length;
+use idna::uts46::ProcessingError;
+use idna::uts46::ProcessingSuccess;
+use idna::uts46::{AsciiDenyList, DnsLength, ErrorPolicy, Hyphens};
+use idna::Errors;
+
+pub fn collect_tests<F: FnMut(String, TestFn)>(add_test: &mut F) {
+    // https://www.unicode.org/Public/idna/13.0.0/IdnaTestV2.txt
+    for (i, line) in include_str!("IdnaTestV2.txt").lines().enumerate() {
+        if line.is_empty() || line.starts_with('#') {
+            continue;
+        }
+
+        // Remove comments
+        let line = match line.find('#') {
+            Some(index) => &line[0..index],
+            None => line,
+        };
+
+        let mut pieces = line.split(';').map(|x| x.trim()).collect::<Vec<&str>>();
+        let source = unescape(pieces.remove(0));
+
+        // ToUnicode
+        let mut to_unicode = unescape(pieces.remove(0));
+        if to_unicode.is_empty() {
+            to_unicode = source.clone();
+        }
+        let to_unicode_status = status(pieces.remove(0));
+
+        // ToAsciiN
+        let to_ascii_n = pieces.remove(0);
+        let to_ascii_n = if to_ascii_n.is_empty() {
+            to_unicode.clone()
+        } else {
+            to_ascii_n.to_owned()
+        };
+        let to_ascii_n_status = pieces.remove(0);
+        let to_ascii_n_status = if to_ascii_n_status.is_empty() {
+            to_unicode_status.clone()
+        } else {
+            status(to_ascii_n_status)
+        };
+
+        let test_name = format!("UTS #46 line {}", i + 1);
+        add_test(
+            test_name,
+            TestFn::DynTestFn(Box::new(move || {
+                let config = idna::uts46::Uts46::new();
+
+                // http://unicode.org/reports/tr46/#Deviations
+                // applications that perform IDNA2008 lookup are not required to check
+                // for these contexts, so we skip all tests annotated with C*
+
+                // Everybody ignores V2
+                // https://github.com/servo/rust-url/pull/240
+                // https://github.com/whatwg/url/issues/53#issuecomment-181528158
+                // http://www.unicode.org/review/pri317/
+
+                // "The special error codes X3 and X4_2 are now returned where a toASCII error code
+                // was formerly being generated in toUnicode due to an empty label."
+                // This is not implemented yet, so we skip toUnicode X4_2 tests for now, too.
+
+                let (to_unicode_value, to_unicode_result) =
+                    config.to_unicode(source.as_bytes(), AsciiDenyList::STD3, Hyphens::Check);
+                let to_unicode_result = to_unicode_result.map(|()| to_unicode_value.into_owned());
+                check(
+                    &source,
+                    (&to_unicode, &to_unicode_status),
+                    to_unicode_result,
+                    |e| e == "X4_2",
+                );
+
+                let to_ascii_n_result = config.to_ascii(
+                    source.as_bytes(),
+                    AsciiDenyList::STD3,
+                    Hyphens::Check,
+                    DnsLength::Verify,
+                );
+                check(
+                    &source,
+                    (&to_ascii_n, &to_ascii_n_status),
+                    to_ascii_n_result.map(|cow| cow.into_owned()),
+                    |_| false,
+                );
+
+                let mut to_unicode_simultaneous = String::new();
+                let mut to_ascii_simultaneous = String::new();
+                let (to_unicode_simultaneous_result, to_ascii_simultaneous_result) = match config
+                    .process(
+                        source.as_bytes(),
+                        AsciiDenyList::STD3,
+                        Hyphens::Check,
+                        ErrorPolicy::MarkErrors,
+                        |_, _, _| true,
+                        &mut to_unicode_simultaneous,
+                        Some(&mut to_ascii_simultaneous),
+                    ) {
+                    Ok(ProcessingSuccess::Passthrough) => (
+                        Ok(source.to_string()),
+                        if verify_dns_length(&source, false) {
+                            Ok(source.to_string())
+                        } else {
+                            Err(Errors::default())
+                        },
+                    ),
+                    Ok(ProcessingSuccess::WroteToSink) => {
+                        if to_ascii_simultaneous.is_empty() {
+                            (
+                                Ok(to_unicode_simultaneous.clone()),
+                                if verify_dns_length(&to_unicode_simultaneous, false) {
+                                    Ok(to_unicode_simultaneous)
+                                } else {
+                                    Err(Errors::default())
+                                },
+                            )
+                        } else {
+                            (
+                                Ok(to_unicode_simultaneous),
+                                if verify_dns_length(&to_ascii_simultaneous, false) {
+                                    Ok(to_ascii_simultaneous)
+                                } else {
+                                    Err(Errors::default())
+                                },
+                            )
+                        }
+                    }
+                    Err(ProcessingError::ValidityError) => {
+                        (Err(Errors::default()), Err(Errors::default()))
+                    }
+                    Err(ProcessingError::SinkError) => unreachable!(),
+                };
+                check(
+                    &source,
+                    (&to_unicode, &to_unicode_status),
+                    to_unicode_simultaneous_result,
+                    |e| e == "X4_2",
+                );
+                check(
+                    &source,
+                    (&to_ascii_n, &to_ascii_n_status),
+                    to_ascii_simultaneous_result,
+                    |_| false,
+                );
+            })),
+        )
+    }
+}
+
+#[allow(clippy::redundant_clone)]
+fn check<F>(source: &str, expected: (&str, &[&str]), actual: Result<String, Errors>, ignore: F)
+where
+    F: Fn(&str) -> bool,
+{
+    if !expected.1.is_empty() {
+        if !expected.1.iter().copied().any(ignore) {
+            let res = actual.ok();
+            assert_eq!(
+                res.clone(),
+                None,
+                "Expected error {:?}. result: {} | source: {}",
+                expected.1,
+                res.unwrap(),
+                source,
+            );
+        }
+    } else {
+        assert!(
+            actual.is_ok(),
+            "Couldn't parse {} | error: {:?}",
+            source,
+            actual.err().unwrap(),
+        );
+        assert_eq!(actual.unwrap(), expected.0, "source: {}", source);
+    }
+}
+
+fn unescape(input: &str) -> String {
+    let mut output = String::new();
+    let mut chars = input.chars();
+    loop {
+        match chars.next() {
+            None => return output,
+            Some(c) => {
+                if c == '\\' {
+                    match chars.next().unwrap() {
+                        '\\' => output.push('\\'),
+                        'u' => {
+                            let c1 = chars.next().unwrap().to_digit(16).unwrap();
+                            let c2 = chars.next().unwrap().to_digit(16).unwrap();
+                            let c3 = chars.next().unwrap().to_digit(16).unwrap();
+                            let c4 = chars.next().unwrap().to_digit(16).unwrap();
+                            match char::from_u32(((c1 * 16 + c2) * 16 + c3) * 16 + c4) {
+                                Some(c) => output.push(c),
+                                None => {
+                                    write!(&mut output, "\\u{:X}{:X}{:X}{:X}", c1, c2, c3, c4)
+                                        .expect("Could not write to output");
+                                }
+                            };
+                        }
+                        _ => panic!("Invalid test data input"),
+                    }
+                } else {
+                    output.push(c);
+                }
+            }
+        }
+    }
+}
+
+fn status(status: &str) -> Vec<&str> {
+    if status.is_empty() || status == "[]" {
+        return Vec::new();
+    }
+
+    let mut result = status.split(", ").collect::<Vec<_>>();
+    assert!(result[0].starts_with('['));
+    result[0] = &result[0][1..];
+
+    let idx = result.len() - 1;
+    let last = &mut result[idx];
+    assert!(last.ends_with(']'));
+    *last = &last[..last.len() - 1];
+
+    result
+}