• #970: Add NsReader::resolver_mut() and NamespaceResolver::{max_declarations_per_element, set_max_declarations_per_element}.

• #969: Attributes (and anything that iterates BytesStart::attributes() with the default with_checks(true)) no longer takes O(N²) time on a start tag with a large number of attributes. Small tags keep the previous linear scan; larger ones switch to a 64-bit hash pre-filter, so the whole tag is O(N). The exact AttrError::Duplicated(new, prev) positions are unchanged.
• #970: NamespaceResolver::push (and hence every NsReader Start/Empty event) now rejects a start tag that declares more than DEFAULT_MAX_DECLARATIONS_PER_ELEMENT (256) xmlns / xmlns:* namespace bindings, returning the new NamespaceError::TooManyDeclarations. Previously push allocated one NamespaceBinding per declaration with no upper bound, before the event was returned to the caller, so an NsReader consumer could not bound its memory exposure on untrusted input. The limit is configurable via NamespaceResolver::set_max_declarations_per_element (use usize::MAX to disable).

• @qifan-sailboat made their first contribution in https://github.com/tafia/quick-xml/pull/972

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.40.1...v0.41.0

• #964: Fix unreachable!() panic in the serde deserializer when a DOCTYPE declaration appears between two text runs inside an element (e.g. <a>x<!DOCTYPE y>z</a>). The DOCTYPE used to break drain_text's consecutive-text merge, so two DeEvent::Text events reached read_text and tripped its "Cannot be two consequent Text events" invariant. DOCTYPE is now treated as transparent during text drain — it still goes through the entity resolver, but the surrounding text is merged into one run. Discovered via libFuzzer on a real-world SAML deserializer harness.

• @williamareynolds made their first contribution in https://github.com/tafia/quick-xml/pull/964

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.40.0...v0.40.1

MSRV bumped to 1.79.

Now quick-xml supports the UTF-16 and ISO-2022-JP encoded documents. See the new DecodingReader type.

• #956: Add DecodingReader, a BufRead adapter that auto-detects encoding from BOM or XML declaration and transcodes to UTF-8. Enabled by the encoding feature.

• #938: Add new enumeration XmlVersion and typified getter BytesDecl::xml_version().

• #938: Add new error variant IllFormedError::UnknownVersion.

• #371: Add new error variant EscapeError::TooManyNestedEntities.

• #371: Improved compliance with the XML attribute value normalization process by adding

  • Attribute::normalized_value()
  • Attribute::normalized_value_with()
  • Attribute::decoded_and_normalized_value()
  • Attribute::decoded_and_normalized_value_with()

  which ought to be used in place of deprecated

  • Attribute::unescape_value()
  • Attribute::unescape_value_with()
  • Attribute::decode_and_unescape_value()
  • Attribute::decode_and_unescape_value_with()

  Deprecated functions now behaves the same as newly added.

• #938: Use correct rules for EOL normalization in Deserializer when parse XML 1.0 documents. Previously XML 1.1. rules was applied.

• #914: Remove deprecated .prefixes(), .resolve(), .resolve_attribute(), and .resolve_element() of NsReader. Use .resolver().<...> methods instead.
• #938: Now BytesText::xml_content, BytesCData::xml_content and BytesRef::xml_content accepts XmlVersion parameter to apply correct EOL normalization rules.
• #944: read_text() now returns BytesText which allows you to get the content with properly normalized EOLs. To get the previous behavior use .read_text().decode()?.
• #956: Bumped MSRV from 1.59 (Feb 2022) to 1.79 (June 2024)

• @dobermai made their first contribution in https://github.com/tafia/quick-xml/pull/958

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.39.4...v0.40.0

• #957: Fix slice-index panic when reading malformed DTD whose unknown markup is split across BufReader chunks. As with #950, the returned Event::DocType may contain the malformed DTD; this fix only ensures that the parser does not panic.
• #960: Fix sibling slice-index panic when a single chunk delivers < followed by 9+ bytes of unknown markup inside a DTD internal subset. Same disposition as #957 / #950: parser must not panic; DTD validity reporting is a future improvement.

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.39.3...v0.39.4

• #950: Fix subtraction with overflow when parse malformed DTD in some cases. Note, that currently we do not check the validity of DTD, so the returned Event::DocType may contain the malformed DTD.

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.39.2...v0.39.3

• #483: Implement read_text_into() and read_text_into_async().

• #939: Fix parsing error of the tag from buffered reader, when the first byte < is the last in the BufRead internal buffer. This is the regression from #936.

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.39.1...v0.39.2

• #598: Add method NamespaceResolver::set_level which may be helpful in some circumstances.

• #597: Fix incorrect processing of namespace scopes in NsReader::read_to_end, NsReader::read_to_end_into, NsReader::read_to_end_into_async and NsReader::read_text. The scope started by a start element was not ended after that call.
• #936: Fix incorrect result of .read_text() when it is called after reading Text or GeneralRef event.

Added a way to configure Writer. Now all configuration is contained in the writer::Config struct and can be applied at once. When serde-types feature is enabled, configuration is serializable.

• #846: Add methods config() and config_mut() to inspect and change the writer configuration.
• #846: Add ability to write space before /> in self-closed tags for maximum compatibility with XHTML.
• #846: Add method empty_element_handling() as a more powerful alternative to expand_empty_elements() in Serializer.
• #929: Allow to pass list of field names to impl_deserialize_for_internally_tagged_enum! macro which is required if you enum variants contains $value fields.

• #923: Implement correct skipping of well-formed DTD.

• #908: Increase minimal supported serde version from 1.0.139 to 1.0.180.
• #913: Deprecate .prefixes(), .resolve(), .resolve_attribute(), and .resolve_element() of NsReader. Use .resolver().bindings() and .resolver().resolve() methods instead.
• #913: Attributes::has_nil now accepts NamespaceResolver instead of Reader<R>.
• #924: (breaking change) Split SyntaxError::UnclosedPIOrXmlDecl into UnclosedPI and UnclosedXmlDecl for more precise error reporting.
• #924: (breaking change) Parser::eof_error now takes &self and content &[u8] parameters.
• #926: (breaking change) Split SyntaxError::UnclosedTag into UnclosedTag, UnclosedSingleQuotedAttributeValue and UnclosedDoubleQuotedAttributeValue for more precise error reporting.

• @rzmk made their first contribution in https://github.com/tafia/quick-xml/pull/920
• @zrneely made their first contribution in https://github.com/tafia/quick-xml/pull/922
• @SuchAFuriousDeath made their first contribution in https://github.com/tafia/quick-xml/pull/924
• @tayu0110 made their first contribution in https://github.com/tafia/quick-xml/pull/925

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.38.4...v0.39.0

• #353: Add ability to serialize textual content as CDATA sections in Serializer. Everywhere where the text node may be created, a CDATA section(s) could be produced instead. See the new Serializer::text_format() method.

• #912: Fix deserialization of numbers, booleans and characters that is space-wrapped, for example <int> 42 </int>. That space characters are usually indent added during serialization and other XML serialization libraries trims them

• #901: Fix running tests on 32-bit architecture
• #909: Avoid some allocations in the Serializer

• @Ninja3047 made their first contribution in https://github.com/tafia/quick-xml/pull/904
• @alexanderkjall made their first contribution in https://github.com/tafia/quick-xml/pull/901

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.38.3...v0.38.4

• #895: Fix incorrect normalization of \rX EOL sequences where X is a char which is UTF-8 encoded as [c2 xx], except [c2 85].

• #895: Add new xml10_content() and xml11_content() methods which behaves the same as html_content() and xml_content() methods, but express intention more clearly.

Full Changelog: https://github.com/tafia/quick-xml/compare/v0.38.2...v0.38.3