diff options
Diffstat (limited to 'third_party/rust/xmldecl')
| -rw-r--r-- | third_party/rust/xmldecl/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/xmldecl/COPYRIGHT | 20 | ||||
| -rw-r--r-- | third_party/rust/xmldecl/Cargo.toml | 26 | ||||
| -rw-r--r-- | third_party/rust/xmldecl/LICENSE-APACHE | 202 | ||||
| -rw-r--r-- | third_party/rust/xmldecl/LICENSE-MIT | 25 | ||||
| -rw-r--r-- | third_party/rust/xmldecl/README.md | 38 | ||||
| -rw-r--r-- | third_party/rust/xmldecl/src/lib.rs | 371 |
7 files changed, 683 insertions, 0 deletions
diff --git a/third_party/rust/xmldecl/.cargo-checksum.json b/third_party/rust/xmldecl/.cargo-checksum.json new file mode 100644 index 0000000000..e5a94a1b57 --- /dev/null +++ b/third_party/rust/xmldecl/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"COPYRIGHT":"12d3af8e034aee1d1955deb3797cb32fd7e014d1540a8714971238a35201fa0f","Cargo.toml":"0bb4ff44435bd07eda06de25599dc80a3954b7a55ab317a7276d9c2b239f49a5","LICENSE-APACHE":"cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30","LICENSE-MIT":"3fa4ca83dcc9237839b1bdeb2e6d16bdfb5ec0c5ce42b24694d8bbf0dcbef72c","README.md":"039f7f51a3e74690d16fbbc35edf42ff7ee23024aeff60a1320fc19117c69e8a","src/lib.rs":"da20ff71c6d81c6a7f066d15ded76bdb8d447784a843a10fc78ca50c7a4f4015"},"package":"efeb408acbc94f7459f1a3ee3620c108ebea5e5baf93a4641c07d57f59f5ffd1"}
\ No newline at end of file diff --git a/third_party/rust/xmldecl/COPYRIGHT b/third_party/rust/xmldecl/COPYRIGHT new file mode 100644 index 0000000000..d0201d26e2 --- /dev/null +++ b/third_party/rust/xmldecl/COPYRIGHT @@ -0,0 +1,20 @@ +Copyright Mozilla Foundation + +Licensed under the Apache License (Version 2.0), or the MIT license, +(the "Licenses") at your option. You may not use this file except in +compliance with one of the Licenses. You may obtain copies of the +Licenses at: + + http://www.apache.org/licenses/LICENSE-2.0 + http://opensource.org/licenses/MIT + +Unless required by applicable law or agreed to in writing, software +distributed under the Licenses is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the Licenses for the specific language governing permissions and +limitations under the Licenses. + +-- + +Test code is dedicated to the Public Domain when so designated +(see source code for PD/CC0-dedicated sections). diff --git a/third_party/rust/xmldecl/Cargo.toml b/third_party/rust/xmldecl/Cargo.toml new file mode 100644 index 0000000000..ef055713f5 --- /dev/null +++ b/third_party/rust/xmldecl/Cargo.toml @@ -0,0 +1,26 @@ +# 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" +name = "xmldecl" +version = "0.2.0" +authors = ["Henri Sivonen <hsivonen@hsivonen.fi>"] +description = "Extracts an encoding from an ASCII-based bogo-XML declaration in text/html in a Web-compatible way" +homepage = "https://docs.rs/xmldecl/" +documentation = "https://docs.rs/xmldecl/" +readme = "README.md" +keywords = ["encoding", "web", "unicode", "charset"] +categories = ["text-processing", "encoding", "web-programming", "internationalization"] +license = "Apache-2.0 OR MIT" +repository = "https://github.com/hsivonen/xmldecl" +[dependencies.encoding_rs] +version = "0.8.0" diff --git a/third_party/rust/xmldecl/LICENSE-APACHE b/third_party/rust/xmldecl/LICENSE-APACHE new file mode 100644 index 0000000000..d645695673 --- /dev/null +++ b/third_party/rust/xmldecl/LICENSE-APACHE @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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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. diff --git a/third_party/rust/xmldecl/README.md b/third_party/rust/xmldecl/README.md new file mode 100644 index 0000000000..9adfefd7e6 --- /dev/null +++ b/third_party/rust/xmldecl/README.md @@ -0,0 +1,38 @@ +# xmldecl + +[](https://crates.io/crates/xmldecl) +[](https://docs.rs/xmldecl/) +[](https://github.com/hsivonen/xmldecl/blob/main/COPYRIGHT) + +`xmldecl::parse()` extracts an encoding from an ASCII-based bogo-XML +declaration in `text/html` in a Web-compatible way. + +See https://github.com/whatwg/html/pull/1752 + +## Licensing + +Please see the file named +[COPYRIGHT](https://github.com/hsivonen/xmldecl/blob/main/COPYRIGHT). + +## Documentation + +Generated [API documentation](https://docs.rs/xmldecl/) is available +online. + +## Minimum Supported Rust Version + +MSRV: 1.51.0 + +## Release Notes + +### 0.2.0 + +* Remove the 1024-byte limit. + +### 0.1.1 + +* Map UTF-16LE and UTF-16BE to UTF-8 as in `meta`. + +### 0.1.0 + +* The initial release. diff --git a/third_party/rust/xmldecl/src/lib.rs b/third_party/rust/xmldecl/src/lib.rs new file mode 100644 index 0000000000..ed4fb43a85 --- /dev/null +++ b/third_party/rust/xmldecl/src/lib.rs @@ -0,0 +1,371 @@ +// Copyright Mozilla Foundation +// +// Licensed under the Apache License (Version 2.0), or the MIT license, +// (the "Licenses") at your option. You may not use this file except in +// compliance with one of the Licenses. You may obtain copies of the +// Licenses at: +// +// http://www.apache.org/licenses/LICENSE-2.0 +// http://opensource.org/licenses/MIT +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the Licenses is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the Licenses for the specific language governing permissions and +// limitations under the Licenses. + +//! `xmldecl::parse()` extracts an encoding from an ASCII-based bogo-XML +//! declaration in `text/html` in a WebKit-compatible way. + +extern crate encoding_rs; + +fn position(needle: u8, haystack: &[u8]) -> Option<usize> { + haystack.iter().position(|&x| x == needle) +} + +// The standard library lacks subslice search. +// Since our needle, "encoding" is short, 'g' occurs in it only once, +// and the other letters we expect to skip over are "version", let's +// search for 'g' and verify match. +fn skip_encoding(hay: &[u8]) -> Option<&[u8]> { + let mut haystack = hay; + loop { + if let Some(g) = position(b'g', haystack) { + let (head, tail) = haystack.split_at(g + 1); + if let Some(_) = head.strip_suffix(b"encoding") { + return Some(tail); + } + haystack = tail; + } else { + return None; + } + } +} + +/// Extracts an encoding from an ASCII-based bogo-XML declaration. +/// `bytes` must the prefix of a `text/html` resource. +/// +/// The intended use is that when the `meta` prescan fails, the HTML +/// parser will have buffered the head section or the first 1024 +/// bytes (whichever is larger) at which point the should be passed to +/// this function. +pub fn parse(bytes: &[u8]) -> Option<&'static encoding_rs::Encoding> { + if let Some(after_xml) = bytes.strip_prefix(b"<?xml") { + if let Some(gt) = position(b'>', after_xml) { + let until_gt = &after_xml[..gt]; + if let Some(tail) = skip_encoding(until_gt) { + let mut pos = 0; + loop { + if pos >= tail.len() { + return None; + } + let c = tail[pos]; + pos += 1; + if c == b'=' { + break; + } + if c <= b' ' { + continue; + } + return None; + } + // pos is now the index of the byte after = + let is_single_quoted; + let label_start; + loop { + if pos >= tail.len() { + return None; + } + let c = tail[pos]; + pos += 1; + if c == b'"' { + is_single_quoted = false; + label_start = pos; + break; + } + if c == b'\'' { + is_single_quoted = true; + label_start = pos; + break; + } + if c <= b' ' { + continue; + } + return None; + } + loop { + if pos >= tail.len() { + return None; + } + let c = tail[pos]; + if c <= b' ' { + return None; + } + if (c == b'"' && !is_single_quoted) || (c == b'\'' && is_single_quoted) { + let encoding = encoding_rs::Encoding::for_label(&tail[label_start..pos]); + if encoding == Some(encoding_rs::UTF_16LE) + || encoding == Some(encoding_rs::UTF_16BE) + { + return Some(encoding_rs::UTF_8); + } + return encoding; + } + pos += 1; + } + } + } + } + None +} + +// Any copyright to the test code below this comment is dedicated to the +// Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ + +#[cfg(test)] +mod tests { + use super::parse; + #[test] + fn baseline() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn meta_encoding_before_charset() { + assert_eq!(parse(b"<?xml version=\"1.0\" <meta encoding=\"windows-1251\" charset=\"windows-1253\"?>AAAA"), Some(encoding_rs::WINDOWS_1251)); + } + #[test] + fn lt() { + assert_eq!( + parse(b"<?xml<encoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn unmatched_quotes() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"windows-1251'?>AAAA"), + None + ); + } + #[test] + fn no_version() { + assert_eq!( + parse(b"<?xml encoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_quotes_space() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=windows-1251 ?>AAAA"), + None + ); + } + #[test] + fn no_quotes() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=windows-1251?>AAAA"), + None + ); + } + #[test] + fn no_space_no_version_line_breaks_trailing_body() { + assert_eq!( + parse(b"<?xmlencoding \n = \n 'windows-1251'<body>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn space_before_label() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\" windows-1251\"?>AAAA"), + None + ); + } + #[test] + fn space_after_label() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"windows-1251 \"?>AAAA"), + None + ); + } + #[test] + fn one_around_label() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"\x01windows-1251\x01\"?>AAAA"), + None + ); + } + #[test] + fn one_around_equals() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding\x01=\x01\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_version_no_space_trailing_lt_without_question_mark() { + assert_eq!( + parse(b"<?xmlencoding=\"windows-1251\"<>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_version_no_space_spaces_around_equals_single_quotes_trailing_body() { + assert_eq!( + parse(b"<?xmlencoding = 'windows-1251'<body>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_version_no_space_single_quotes_trailing_body() { + assert_eq!( + parse(b"<?xmlencoding='windows-1251'<body>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_version_no_space_double_quotes_trailing_body() { + assert_eq!( + parse(b"<?xmlencoding=\"windows-1251\"<body>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_version_no_space_no_trailing_question_mark() { + assert_eq!( + parse(b"<?xmlencoding=\"windows-1251\">AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn no_version_no_space() { + assert_eq!( + parse(b"<?xmlencoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn upper_case_xml() { + assert_eq!( + parse(b"<?XML version=\"1.0\" encoding=\"windows-1251\"?>AAAA"), + None + ); + } + #[test] + fn meta_charset_before_encoding() { + assert_eq!(parse(b"<?xml version=\"1.0\" <meta charset=\"windows-1253\" encoding=\"windows-1251\"?>AAAA"), Some(encoding_rs::WINDOWS_1251)); + } + #[test] + fn lt_between_xml_and_encoding() { + assert_eq!( + parse(b"<?xml<encoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn letter_between_xml_and_encoding() { + assert_eq!( + parse(b"<?xmlaencoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn gt_between_xml_and_encoding() { + assert_eq!(parse(b"<?xml>encoding=\"windows-1251\"?>"), None); + } + #[test] + fn non_primary_label() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"cp1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn upper_case_label() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"WINDOWS-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn upper_case_version() { + assert_eq!( + parse(b"<?xml VERSION=\"1.0\" encoding=\"windows-1251\"?>AAAA"), + Some(encoding_rs::WINDOWS_1251) + ); + } + #[test] + fn upper_case_encoding() { + assert_eq!( + parse(b"<?xml version=\"1.0\" ENCODING=\"windows-1251\"?>AAAA"), + None + ); + } + #[test] + fn space_before() { + assert_eq!( + parse(b" <?xml version=\"1.0\" encoding=\"windows-1251\"?>AAAA"), + None + ); + } + #[test] + fn encoding_equals_encoding() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=encoding=\"windows-1251\"?>AAAA"), + None + ); + } + #[test] + fn encodingencoding() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encodingencoding=\"windows-1251\"?>AAAA"), + None + ); + } + #[test] + fn utf16() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"UTF-16\"?>AAAA"), + Some(encoding_rs::UTF_8) + ); + } + #[test] + fn utf16le() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"UTF-16LE\"?>AAAA"), + Some(encoding_rs::UTF_8) + ); + } + #[test] + fn utf16be() { + assert_eq!( + parse(b"<?xml version=\"1.0\" encoding=\"UTF-16BE\"?>AAAA"), + Some(encoding_rs::UTF_8) + ); + } + #[test] + fn bytes_1024() { + let mut v = Vec::new(); + v.extend_from_slice(b"<?xml version=\"1.0\" encoding=\"windows-1251\""); + while v.len() < 1022 { + v.push(b' '); + } + v.extend_from_slice(b"?>AAAA"); + assert_eq!(v.len(), 1028); + assert_eq!(parse(&v), Some(encoding_rs::WINDOWS_1251)); + } + #[test] + fn bytes_1025() { + let mut v = Vec::new(); + v.extend_from_slice(b"<?xml version=\"1.0\" encoding=\"windows-1251\""); + while v.len() < 1023 { + v.push(b' '); + } + v.extend_from_slice(b"?>AAAA"); + assert_eq!(v.len(), 1029); + assert_eq!(parse(&v), Some(encoding_rs::WINDOWS_1251)); + } +} |