jsoup Java HTML Parser release 1.23.1

jsoup 1.23.1 is out now, with a faster and more memory-efficient HTML parser, improved alignment with the HTML standard across noscript, CDATA, SVG, and MathML parsing, and safer, specification-correct HTTP redirects. The release also adds a fast immutable Element#classList(), direct outer-HTML output to an Appendable, and fixes across RCDATA parsing, XML conversion, tag-name handling, and Cleaner link detection.

Performance optimization was a major focus for this release. In our OpenJDK 21 benchmarks, ordinary string parsing is now 18% faster on average, parsing from an InputStream is 11% faster, and parsing with source position tracking is 70% faster while allocating 64% fewer bytes per document.

Source-tracked DOMs retain 58-65% less memory on representative medium-to-large documents, and the improvements hold under concurrent parsing without introducing new contention. Exact gains will naturally vary with document shape, JVM, and hardware.

This release also fixes a security issue in the Cleaner that could expose markup when malformed HTML is cleaned with a custom Safelist permitting certain raw-text elements. The built-in Safelists are unaffected.

jsoup is a Java library for working with real-world HTML and XML. It provides a very convenient API for extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors.

Download jsoup now.

Improvements

• Reduced retained memory when parsing with source position tracking enabled (Parser#setTrackPosition(true)). Source ranges are now stored in compact parser-owned span records instead of node and attribute user data, and Position objects are created lazily when source ranges are read. This cuts tracked DOM retained size by about 50-60% on representative benchmark documents, while keeping Node#sourceRange(), Element#endSourceRange(), and Attribute#sourceRange() behavior intact. #2498
• Added Element#classList(), an immutable snapshot of an element's class names in attribute order. Use hasClass() when you just need to test for one class, classList() when you want to read or iterate classes without needing a mutable result, and classNames() when you want the existing mutable, deduplicated set that can be written back with classNames(Set). The class APIs now share an HTML-whitespace scanner, which also makes classNames() faster and lighter on allocation, especially when walking many elements without class names. #2500
• Aligned HTML parser scope classification with the current HTML spec for select, foreignObject, and template. #2501
• Simplified the HTML tree builder's scope, implied-end-tag, and special-element checks by caching parser-only options on Tag. That improves HTML parser throughput by about 10% on small inputs and up to about 30% on larger inputs in the benchmark fixtures. #2502
• Improved HTML parser throughput stability by making hot tokeniser scan paths compile more predictably. #2507
• <noscript> fallback markup is now parsed into an inspectable DOM subtree in both the document head and body. The fallback acts as a contained parsing island, so malformed markup cannot disrupt the surrounding document structure, while normal HTML tokenization still applies within it. This also improves round-trip serialization. #2537
• Improved redirect credential handling as a defense-in-depth measure: explicit authorization headers and request cookies are no longer forwarded across origins, reducing exposure through open redirects and aligning with HTTP guidance. Cookies managed by a CookieStore continue to follow their configured scope. #2540
• Elements can now append their outer HTML, including their own tags, directly to an Appendable with Node#outerHtml(Appendable), without first creating a String. This complements Element#html(Appendable), which appends inner HTML only. #2532
• Aligned CDATA tokenization with the HTML spec: CDATA syntax in HTML content is parsed as a bogus comment, while it remains supported in SVG, MathML, and XML. Also improved namespace-aware fragment parsing so SVG and MathML contexts, HTML integration points, and context-sensitive tokenizer states are handled correctly. #2542
• When using the optional re2j regular expression engine, stack overflows caused by complex selector patterns are now normalized to a ValidationException with a Pattern complexity error message. #2548

Bug Fixes

• Fixed HTML parsing of mixed-case RCDATA end tags after tag-shaped text. For example, <title><p>Foo</TiTLE> and <textarea><img src=x></TeXtArEa> now keep the tag-shaped content as text instead of promoting it to markup. #2503
• Fixed W3CDom XML conversion so plain XML elements don't serialize with the reserved XML namespace as the default namespace. Explicit XML namespaces and xml:* attributes are still preserved. #2504
• Preserve control characters in parsed tag names #2538
• Updated HTTP redirects to follow the specification: 307 and 308 preserve the request method and content, 301 and 302 only change POST to GET, and Location is followed only for 301, 302, 303, 307, and 308 responses. Streamed request bodies are not buffered; if an automatic redirect requires replaying one, execution fails, so the caller can resend with a fresh stream. #2540
• Corrected the Cleaner's same-site link detection to compare hostnames rather than URL prefixes when applying rel=nofollow. #2543

Build Changes

• Cleaned up the Maven build for the multi-release JAR so Java 8 and Java 11+ sources compile as separate source sets. This avoids spurious Java 8 compiler warnings from newer-language overlay sources, keeps long-running parser checks behind an explicit profile, and preserves the same published artifacts and runtime behavior.
• Improved parallelism and tuned timing in our integration tests, so that a full mvn clean verify drops from ~ 1m18s to ~ 21 seconds.

My sincere thanks to everyone who contributed to this release!
If you have any suggestions for the next release, I would love to hear them; please get in touch via jsoup discussions, or with me directly.

You can also follow me (@jhy@tilde.zone) on Mastodon / Fediverse to receive occasional notes about jsoup releases.

jsoup 1.22.2 is out now, with fixes and refinements across the library. It makes editing the DOM during traversal more predictable, refreshes the default HTML tag definitions with newer elements and better text boundaries, and improves reliability in parsing and HTTP transport. The release also fixes a number of edge cases in cleaning, stream parsing, XML doctype handling, and Android packaging.

jsoup is a Java library for working with real-world HTML and XML. It provides a very convenient API for extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors.

Download jsoup now.

Improvements

• Expanded and clarified NodeTraversor support for in-place DOM rewrites during NodeVisitor.head(). Current-node edits such as remove, replace, and unwrap now recover more predictably, while traversal stays within the original root subtree. This makes single-pass tree cleanup and normalization visitors easier to write, for example when unwrapping presentational elements or replacing text nodes as you walk the DOM. #2472
• Documentation: clarified that a configured Cleaner may be reused across concurrent threads, and that shared Safelist instances should not be mutated while in use. #2473
• Updated the default HTML TagSet for current HTML elements: added dialog, search, picture, and slot; made ins, del, button, audio, video, and canvas inline by default (Tag#isInline(), aligned to phrasing content in the spec); and added readable Element.text() boundaries for controls and embedded objects via the new Tag.TextBoundary option. This improves pretty-printing and keeps normalized text from running adjacent words together. #2493

Bug Fixes

• Android (R8/ProGuard): added a rule to ignore the optional re2j dependency when not present. #2459
• Fixed a NodeTraversor regression in 1.21.2 where removing or replacing the current node during head() could revisit the replacement node and loop indefinitely. The traversal docs now also clarify which inserted nodes are visited in the current pass. #2472
• Parsing during charset sniffing no longer fails if an advisory available() call throws IOException, as seen on JDK 8 HttpURLConnection. #2474
• Cleaner no longer makes relative URL attributes in the input document absolute when cleaning or validating a Document. URL normalization now applies only to the cleaned output, and Safelist.isSafeAttribute() is side effect free. #2475
• Cleaner no longer duplicates enforced attributes when the input Document preserves attribute case. A case-variant source attribute is now replaced by the enforced attribute in the cleaned output. #2476
• If a per-request SOCKS proxy is configured, jsoup now avoids using the JDK HttpClient, because the JDK would silently ignore that proxy and attempt to connect directly. Those requests now fall back to the legacy HttpURLConnection transport instead, which does support SOCKS. #2468
• Connection.Response.streamParser() and DataUtil.streamParser(Path, ...) could fail on small inputs without a declared charset, if the initial 5 KB charset sniff fully consumed the input and closed it before the stream parse began. #2483
• In XML mode, doctypes with an internal subset, such as <!DOCTYPE root [<!ENTITY name "value">]>, now round-trip correctly. The subset is preserved as raw text only; entities are not expanded and external DTDs are not loaded. #2486

Build Changes

• Migrated the integration test server from Jetty to Netty, which actively maintains support for our minimum JDK target (8). #2491

My sincere thanks to everyone who contributed to this release!
If you have any suggestions for the next release, I would love to hear them; please get in touch via jsoup discussions, or with me directly.

You can also follow me (@jhy@tilde.zone) on Mastodon / Fediverse to receive occasional notes about jsoup releases.

jsoup 1.22.1 is out now, adding support for the re2j regular expression engine for regex-based CSS selectors, a configurable maximum parser depth, and numerous bug fixes and improvements.

jsoup is a Java library for working with real-world HTML and XML. It provides a very convenient API for extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors.

Download jsoup now.

Improvements

• Added support for using the re2j regular expression engine for regex-based CSS selectors (e.g. [attr~=regex], :matches(regex)), which ensures linear-time performance for regex evaluation. This allows safer handling of arbitrary user-supplied query regexes. To enable, add the com.google.re2j dependency to your classpath, e.g.:

  <dependency>
    <groupId>com.google.re2j</groupId>
    <artifactId>re2j</artifactId>
    <version>1.8</version>
  </dependency>

(If you already have that dependency in your classpath, but you want to keep using the Java regex engine, you can disable re2j via System.setProperty("jsoup.useRe2j", "false").) You can confirm that the re2j engine has been enabled correctly by calling Regex.usingRe2j(). #2407

• Added an instance method Parser#unescape(String, boolean) that unescapes HTML entities using the parser's configuration (e.g. to support error tracking), complementing the existing static utility Parser.unescapeEntities(String, boolean). #2396
• Added a configurable maximum parser depth (to limit the number of open elements on stack) to both HTML and XML parsers. The HTML parser now defaults to a depth of 512 to match browser behavior, and protect against unbounded stack growth, while the XML parser keeps unlimited depth by default, but can opt into a limit via Parser.setMaxDepth(). #2421
• Build: added CI coverage for JDK 25 #2403
• Build: added a CI fuzzer for contextual fragment parsing (in addition to existing full body HTML and XML fuzzers). oss-fuzz #14041

Changes

• Set a removal schedule of jsoup 1.24.1 for previously deprecated APIs.

Bug Fixes

• Previously cached child Elements of an Element were not correctly invalidated in Node#replaceWith(Node), which could lead to incorrect results when subsequently calling Element#children(). #2391
• Attribute selector values are now compared literally without trimming. Previously, jsoup trimmed whitespace from selector values and from element attribute values, which could cause mismatches with browser behavior (e.g. [attr=" foo "]). Now matches align with the CSS specification and browser engines. #2380
• When using the JDK HttpClient, any system default proxy (ProxySelector.getDefault()) was ignored. Now, the system proxy is used if a per-request proxy is not set. #2388, #2390
• A ValidationException could be thrown in the adoption agency algorithm with particularly broken input. Now logged as a parse error. #2393
• Null characters in the HTML body were not consistently removed; and in foreign content were not correctly replaced. #2395
• An IndexOutOfBoundsException could be thrown when parsing a body fragment with crafted input. Now logged as a parse error. #2397, #2406
• When using StructuralEvaluators (e.g., a parent child selector) across many retained threads, their memoized results could also be retained, increasing memory use. These results are now cleared immediately after use, reducing overall memory consumption. #2411
• Cloning a Parser now preserves any custom TagSet applied to the parser. #2422, #2423
• Custom tags marked as Tag.Void now parse and serialize like the built-in void elements: they no longer consume following content, and the XML serializer emits the expected self-closing form. #2425
• The <br> element is once again classified as an inline tag (Tag.isBlock() == false), matching common developer expectations and its role as phrasing content in HTML, while pretty-printing and text extraction continue to treat it as a line break in the rendered output. #2387, #2439
• Fixed an intermittent truncation issue when fetching and parsing remote documents via Jsoup.connect(url).get(). On responses without a charset header, the initial charset sniff could sometimes (depending on buffering / available() behavior) be mistaken for end-of-stream and a partial parse reused, dropping trailing content. #2448
• TagSet copies no longer mutate their template during lazy lookups, preventing cross-thread ConcurrentModificationException when parsing with shared sessions. #2453
• Fixed parsing of <svg> foreignObject content nested within a <p>, which could incorrectly move the HTML subtree outside the SVG. #2452

Internal Changes

• Deprecated internal helper org.jsoup.internal.Functions (for removal in v1.23.1). This was previously used to support older Android API levels without full java.util.function coverage; jsoup now requires core library desugaring so this indirection is no longer necessary. #2412

My sincere thanks to everyone who contributed to this release!
If you have any suggestions for the next release, I would love to hear them; please get in touch via jsoup discussions, or with me directly.

You can also follow me (@jhy@tilde.zone) on Mastodon / Fediverse to receive occasional notes about jsoup releases.

jsoup 1.21.2 is out now, adding support for custom SSLContext in HTTP/2 connections, and improving consistency in how user data is handled in attributes. It also brings performance gains in DOM manipulation and fragment parsing, and fixes several edge cases in stream parsing, traversal, cloning, and concurrent reads.

jsoup is a Java library for working with real-world HTML and XML. It provides a very convenient API for extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors.

Changes

• Deprecated internal (yet visible) methods Normalizer#normalize(String, bool) and Attribute#shouldCollapseAttribute(Document.OutputSettings). These will be removed in a future version.
• Deprecated Connection#sslSocketFactory(SSLSocketFactory) in favor of the new Connection#sslContext(SSLContext). Using sslSocketFactory will force the use of the legacy HttpUrlConnection implementation, which does not support HTTP/2. #2370

Improvements

• When pretty-printing, if there are consecutive text nodes (via DOM manipulation), the non-significant whitespace between them will be collapsed. #2349.
• Updated Connection.Response#statusMessage() to return a simple loggable string message (e.g. "OK") when using the HttpClient implementation, which doesn't otherwise return any server-set status message. #2356
• Attributes#size() and Attributes#isEmpty() now exclude any internal attributes (such as user data) from their count. This aligns with the attributes' serialized output and iterator. #2369
• Added Connection#sslContext(SSLContext) to provide a custom SSL (TLS) context to requests, supporting both the HttpClient and the legacy HttUrlConnection implementations. #2370
• Performance optimizations for DOM manipulation methods including when repeatedly removing an element's first child (element.child(0).remove(), and when using Parser#parseBodyFragement() to parse a large number of direct children. #2373.

Bug Fixes

• When parsing from an InputStream and a multibyte character happened to straddle a buffer boundary, the stream would not be completely read. #2353.
• In NodeTraversor, if a last child element was removed during the head() call, the parent would be visited twice. #2355.
• Cloning an Element that has an Attributes object would add an empty internal user-data attribute to that clone, which would cause unexpected results for Attributes#size() and Attributes#isEmpty(). #2356
• In a multithreaded application where multiple threads are calling Element#children() on the same element concurrently, a race condition could happen when the method was generating the internal child element cache (a filtered view of its child nodes). Since concurrent reads of DOM objects should be threadsafe without external synchronization, this method has been updated to execute atomically. #2366
• When parsing HTML with svg:script elements in SVG elements, don't enter the Text insertion mode, but continue to parse as foreign content. Otherwise, misnested HTML could then cause an IndexOutOfBoundsException. #2374
• Malformed HTML could throw an IndexOutOfBoundsException during the adoption agency. #2377.

jsoup 1.21.1 is out now, featuring powerful new node selection capabilities that let you target specific DOM nodes like comments and text nodes using CSS selectors, dynamic tag customization through the new TagSet callback system, and improved defense against mutation XSS attacks with simplified attribute escaping. This release also brings HTTP/2 support by default, numerous API improvements for better developer experience, and fixes for several edge-case parsing issues.

jsoup is a Java library for working with real-world HTML and XML. It provides a very convenient API for extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors.

Changes

• Removed previously deprecated methods. #2317
• Deprecated the :matchText pseduo-selector due to its side effects on the DOM; use the new ::textnode selector and the Element#selectNodes(String css, Class<T> type) method instead. #2343
• Deprecated Connection.Response#bufferUp() in lieu of Connection.Response#readFully() which can throw a checked IOException.
• Deprecated internal methods Validate#ensureNotNull(Object) (replaced by typed Validate#expectNotNull(T)); protected HTML appenders from Attribute and Node.
• If you happen to be using any of the deprecated methods, please take the opportunity now to migrate away from them, as they will be removed in a future release.

Improvements

• Enhanced the Selector to support direct matching against nodes such as comments and text nodes. For example, you can now find an element that follows a specific comment: ::comment:contains(prices) + p will select p elements immediately after a <!-- prices: --> comment. Supported types include ::node, ::leafnode, ::comment, ::text, ::data, and ::cdata. Node contextual selectors like ::node:contains(text), :matches(regex), and :blank are also supported. Introduced Element#selectNodes(String css) and Element#selectNodes(String css, Class<T> nodeType) for direct node selection. #2324
• Added TagSet#onNewTag(Consumer<Tag> customizer): register a callback that’s invoked for each new or cloned Tag when it’s inserted into the set. Enables dynamic tweaks of tag options (for example, marking all custom tags as self-closing, or everything in a given namespace as preserving whitespace). #2330
• Made TokenQueue and CharacterReader autocloseable, to ensure that they will release their buffers back to the buffer pool, for later reuse.
• Added Selector#evaluatorOf(String css), as a clearer way to obtain an Evaluator from a CSS query. An alias of QueryParser.parse(String css).
• Custom tags (defined via the TagSet) in a foreign namespace (e.g. SVG) can be configured to parse as data tags.
• Added NodeVisitor#traverse(Node) to simplify node traversal calls (vs. importing NodeTraversor).
• Updated the default user-agent string to improve compatibility. #2341
• The HTML parser now allows the specific text-data type (Data, RcData) to be customized for known tags. (Previously, that was only supported on custom tags.) #2326
• Added Connection.Response#readFully() as a replacement for Connection.Response#bufferUp() with an explicit IOException. Similarly, added Connection.Response#readBody() over Connection.Response#body(). Deprecated Connection.Response#bufferUp(). #2327
• When serializing HTML, the < and > characters are now escaped in attributes. This helps prevent a class of mutation XSS attacks. #2337
• Changed Connection to prefer using the JDK's HttpClient over HttpUrlConnection, if available, to enable HTTP/2 support by default. Users can disable via -Djsoup.useHttpClient=false. #2340

Bug Fixes

• The contents of a script in a svg foreign context should be parsed as script data, not text. #2320
• Tag#isFormSubmittable() was updating the Tag's options. #2323
• The HTML pretty-printer would incorrectly trim whitespace when text followed an inline element in a block element. #2325
• Custom tags with hyphens or other non-letter characters in their names now work correctly as Data or RcData tags. Their closing tags are now tokenized properly. #2332
• When cloning an Element, the clone would retain the source's cached child Element list (if any), which could lead to incorrect results when modifying the clone's child elements. #2334

Changes

• To better follow the HTML5 spec and current browsers, the HTML parser no longer allows self-closing tags (<foo />) to close HTML elements by default. Foreign content (SVG, MathML), and content parsed with the XML parser, still supports self-closing tags. If you need specific HTML tags to support self-closing, you can register a custom tag via
  the TagSet configured in Parser.tagSet(), using Tag#set(Tag.SelfClose). Standard void tags (such as <img>, <br>, etc.) continue to behave as usual and are not affected by this
  change. #2300.
• The following internal components have been deprecated. If you do happen to be using any of these, please take the opportunity now to migrate away from them, as they will be removed in jsoup 1.21.1.
  • ChangeNotifyingArrayList, Document.updateMetaCharsetElement(), Document.updateMetaCharsetElement(boolean), HtmlTreeBuilder.isContentForTagData(String), Parser.isContentForTagData(String), Parser.setTreeBuilder(TreeBuilder), Tag.formatAsBlock(), Tag.isFormListed(), TokenQueue.addFirst(String), TokenQueue.chompTo(String), TokenQueue.chompToIgnoreCase(String), TokenQueue.consumeToIgnoreCase(String), TokenQueue.consumeWord(), TokenQueue.matchesAny(String...)

Functional Improvements

• Rebuilt the HTML pretty-printer, to simplify and consolidate the implementation, improve consistency, support custom Tags, and provide a cleaner path for ongoing improvements. The specific HTML produced by the pretty-printer may be different from previous versions. #2286.
• Added the ability to define custom tags, and to modify properties of known tags, via the TagSet tag collection. Their properties can impact both the parse and how content is serialized (output as HTML or XML). #2285.
• Element.cssSelector() will prefer to return shorter selectors by using ancestor IDs when available and unique. E.g. #id > div > p instead of html > body > div > div > p #2283.
• Added Elements.deselect(int index), Elements.deselect(Object o), and Elements.deselectAll() methods to remove elements from the Elements list without removing them from the underlying DOM. Also added Elements.asList() method to get a modifiable list of elements without affecting the DOM. (Individual Elements remain linked to the DOM.) #2100.
• Added support for sending a request body from an InputStream with Connection.requestBodyStream(InputStream stream). #1122.
• The XML parser now supports scoped xmlns: prefix namespace declarations, and applies the correct namespace to Tags and Attributes. Also, added Tag#prefix(), Tag#localName(), Attribute#prefix(), Attribute#localName(), and Attribute#namespace() to retrieve these. #2299.
• CSS identifiers are now escaped and unescaped correctly to the CSS spec. Element#cssSelector() will emit appropriately escaped selectors, and the QueryParser supports those. Added Selector.escapeCssIdentifier() and ` Selector.unescapeCssIdentifier(). #2297, #2305

Structure and Performance Improvements

• Refactored the CSS QueryParser into a clearer recursive descent parser. #2310.
• CSS selectors with consecutive combinators (e.g. div >> p) will throw an explicit parse exception. #2311.
• Performance: reduced the shallow size of an Element from 40 to 32 bytes, and the NodeList from 32 to 24. #2307.
• Performance: reduced GC load of new StringBuilders when tokenizing input HTML. #2304.
• Made Parser instances threadsafe, so that inadvertent use of the same instance across threads will not lead to errors. For actual concurrency, use Parser#newInstance() per thread. #2314.

Bug Fixes

• Element names containing characters invalid in XML are now normalized to valid XML names when serializing. #1496.
• When serializing to XML, characters that are invalid in XML 1.0 should be removed (not encoded). #1743.
• When converting a Document to the W3C DOM in W3CDom, elements with an attribute in an undeclared namespace now get a declaration of xmlns:prefix="undefined". This allows subsequent serialization to XML via W3CDom.asString() to succeed. #2087.
• The StreamParser could emit the final elements of a document twice, due to how onNodeCompleted was fired when closing out the stack. #2295.
• When parsing with the XML parser and error tracking enabled, the trailing ? in <?xml version="1.0"?> would incorrectly emit an error. #2298.
• Calling Element#cssSelector() on an element with combining characters in the class or ID now produces the correct output. #1984.

Changes

• Added support for http/2 requests in Jsoup.connect(), when running on Java 11+, via the Java HttpClient
  implementation. #2257.
  • In this version of jsoup, the default is to make requests via the HttpUrlConnection implementation: use
    System.setProperty("jsoup.useHttpClient", "true"); to enable making requests via the HttpClient instead ,
    which will enable http/2 support, if available. This will become the default in a later version of jsoup, so now is
    a good time to validate it.
  • If you are repackaging the jsoup jar in your deployment (i.e. creating a shaded- or a fat-jar), make sure to specify
    that as a Multi-Release
    JAR.
  • If the HttpClient impl is not available in your JRE, requests will continue to be made via
    HttpURLConnection (in http/1.1 mode).
• Updated the minimum Android API Level validation from 10 to 21. As with previous jsoup versions, Android
  developers need to enable core library desugaring. The minimum Java version remains Java 8.
  #2173
• Removed previously deprecated class: org.jsoup.UncheckedIOException (replace with java.io.UncheckedIOException);
  moved previously deprecated method Element Element#forEach(Consumer) to
  void Element#forEach(Consumer()). #2246
• Deprecated the methods Document#updateMetaCharsetElement(bool) and #Document#updateMetaCharsetElement(), as the
  setting had no effect. When Document#charset(Charset) is called, the document's meta charset or XML encoding
  instruction is always set. #2247

Improvements

• When cleaning HTML with a Safelist that preserves relative links, the isValid() method will now consider these
  links valid. Additionally, the enforced attribute rel=nofollow will only be added to external links when configured
  in the safelist. #2245
• Added Element#selectStream(String query) and Element#selectStream(Evaluator) methods, that return a Stream of
  matching elements. Elements are evaluated and returned as they are found, and the stream can be
  terminated early. #2092
• Element objects now implement Iterable, enabling them to be used in enhanced for loops.
• Added support for fragment parsing from a Reader via
  Parser#parseFragmentInput(Reader, Element, String). #1177
• Reintroduced CLI executable examples, in jsoup-examples.jar. #1702
• Optimized performance of selectors like #id .class (and other similar descendant queries) by around 4.6x, by better
  balancing the Ancestor evaluator's cost function in the query
  planner. #2254
• Removed the legacy parsing rules for <isindex> tags, which would autovivify a form element with labels. This is no
  longer in the spec.
• Added Elements.selectFirst(String cssQuery) and Elements.expectFirst(String cssQuery), to select the first
  matching element from an Elements list. #2263
• When parsing with the XML parser, XML Declarations and Processing Instructions are directly handled, vs bouncing
  through the HTML parser's bogus comment handler. Serialization for non-doctype declarations no longer end with a
  spurious !. #2275
• When converting parsed HTML to XML or the W3C DOM, element names containing < are normalized to _ to ensure valid
  XML. For example, <foo<bar> becomes <foo_bar>, as XML does not allow < in element names, but HTML5
  does. #2276
• Reimplemented the HTML5 Adoption Agency Algorithm to the current spec. This handles mis-nested formating / structural elements. #2278

Bug Fixes

• If an element has an ; in an attribute name, it could not be converted to a W3C DOM element, and so subsequent XPath
  queries could miss that element. Now, the attribute name is more completely
  normalized. #2244
• For backwards compatibility, reverted the internal attribute key for doctype names to
  "name". #2241
• In Connection, skip cookies that have no name, rather than throwing a validation
  exception. #2242
• When running on JDK 1.8, the error java.lang.NoSuchMethodError: java.nio.ByteBuffer.flip()Ljava/nio/ByteBuffer;
  could be thrown when calling Response#body() after parsing from a URL and the buffer size was
  exceeded. #2250
• For backwards compatibility, allow null InputStream inputs to Jsoup.parse(InputStream stream, ...), by returning
  an empty Document. #2252
• A template tag containing an li within an open li would be parsed incorrectly, as it was not recognized as a
  "special" tag (which have additional processing rules). Also, added the SVG and MathML namespace tags to the list of
  special tags. #2258
• A template tag containing a button within an open button would be parsed incorrectly, as the "in button scope"
  check was not aware of the template element. Corrected other instances including MathML and SVG elements,
  also. #2271
• An :nth-child selector with a negative digit-less step, such as :nth-child(-n+2), would be parsed incorrectly as a
  positive step, and so would not match as expected. #1147
• Calling doc.charset(charset) on an empty XML document would throw an
  IndexOutOfBoundsException. #2266
• Fixed a memory leak when reusing a nested StructuralEvaluator (e.g., a selector ancestor chain like A B C) by
  ensuring cache reset calls cascade to inner members. #2277
• Concurrent calls to doc.clone().append(html) were not supported. When a document was cloned, its Parser was not cloned but was a shallow copy of the original parser. #2281

Bug Fixes

• When serializing to XML, attribute names containing -, ., or digits were incorrectly marked as invalid and removed. 2235

Improvements

• Optimized the throughput and memory use throughout the input read and parse flows, with heap allocations and GC down between -6% and -89%, and throughput improved up to +143% for small inputs. Most inputs sizes will see throughput increases of ~ 20%. These performance improvements come through recycling the backing byte[] and char[] arrays used to read and parse the input. 2186
• Speed optimized html() and Entities.escape() when the input contains UTF characters in a supplementary plane, by around 49%. 2183
• The form associated elements returned by FormElement.elements() now reflect changes made to the DOM, subsequently to the original parse. 2140
• In the TreeBuilder, the onNodeInserted() and onNodeClosed() events are now also fired for the outermost / root Document node. This enables source position tracking on the Document node (which was previously unset). And it also enables the node traversor to see the outer Document node. 2182
• Selected Elements can now be position swapped inline using Elements#set(). 2212

Bug Fixes

• Element.cssSelector() would fail if the element's class contained a * character. 2169
• When tracking source ranges, a text node following an invalid self-closing element may be left untracked. 2175
• When a document has no doctype, or a doctype not named html, it should be parsed in Quirks Mode. 2197
• With a selector like div:has(span + a), the has() component was not working correctly, as the inner combining query caused the evaluator to match those against the outer's siblings, not children. 2187
• A selector query that included multiple :has() components in a nested :has() might incorrectly execute. 2131
• When cookie names in a response are duplicated, the simple view of cookies available via Connection.Response#cookies() will provide the last one set. Generally it is better to use the Jsoup.newSession method to maintain a cookie jar, as that applies appropriate path selection on cookies when making requests. 1831
• When parsing named HTML entities, base entities should resolve if they are a prefix of the input token (and not in an attribute). 2207
• Fixed incorrect tracking of source ranges for attributes merged from late-occurring elements that were implicitly created (html or body). 2204
• Follow the current HTML specification in the tokenizer to allow < as part of a tag name, instead of emitting it as a character node. 2230
• Similarly, allow a < as the start of an attribute name, vs creating a new element. The previous behavior was intended to parse closer to what we anticipated the author's intent to be, but that does not align to the spec or to how browsers behave. 1483

Improvements

• Stream Parser: A StreamParser provides a progressive parse of its input. As each Element is completed, it is emitted via a Stream or Iterator interface. Elements returned will be complete with all their children, and an (empty) next sibling, if applicable. Elements (or their children) may be removed from the DOM during the parse, for e.g. to conserve memory, providing a mechanism to parse an input document that would otherwise be too large to fit into memory, yet still providing a DOM interface to the document and its elements. Additionally, the parser provides a selectFirst(String query) / selectNext(String query), which will run the parser until a hit is found, at which point the parse is suspended. It can be resumed via another select() call, or via the stream() or iterator() methods. 2096
• Download Progress: added a Response Progress event interface, which reports progress and URLs are downloaded (and parsed). Supported on both a session and a single connection level. 2164, 656
• Added Path accepting parse methods: Jsoup.parse(Path), Jsoup.parse(path, charsetName, baseUri, parser), etc. 2055
• Updated the button tag configuration to include a space between multiple button elements in the Element.text() method. 2105
• Added support for the ns|* all elements in namespace Selector. 1811
• When normalising attribute names during serialization, invalid characters are now replaced with _, vs being stripped. This should make the process clearer, and generally prevent an invalid attribute name being coerced unexpectedly. 2143

Changes

• Removed previously deprecated internal classes and methods. 2094
• Build change: the built jar's OSGi manifest no longer imports itself. 2158

Bug Fixes

• When tracking source positions, if the first node was a TextNode, its position was incorrectly set to -1. 2106
• When connecting (or redirecting) to URLs with characters such as {, } in the path, a Malformed URL exception would be thrown (if in development), or the URL might otherwise not be escaped correctly (if in production). The URL encoding process has been improved to handle these characters correctly. 2142
• When using W3CDom with a custom output Document, a Null Pointer Exception would be thrown. 2114
• The :has() selector did not match correctly when using sibling combinators (like e.g.: h1:has(+h2)). 2137
• The :empty selector incorrectly matched elements that started with a blank text node and were followed by non-empty nodes, due to an incorrect short-circuit. 2130
• Element.cssSelector() would fail with "Did not find balanced marker" when building a selector for elements that had a ( or [ in their class names. And selectors with those characters escaped would not match as expected. 2146
• Updated Entities.escape(string) to make the escaped text suitable for both text nodes and attributes (previously was only for text nodes). This does not impact the output of Element.html() which correctly applies a minimal escape depending on if the use will be for text data or in a quoted attribute. 1278
• Fuzz: a Stack Overflow exception could occur when resolving a crafted <base href> URL, in the normalizing regex. 2165

Improvements

• Attribute object accessors: Added Element.attribute(String) and Attributes.attribute(String) to more simply obtain an Attribute object. 2069
• Attribute source tracking: If source tracking is on, and an Attribute's key is changed ( via Attribute.setKey(String)), the source range is now still tracked in Attribute.sourceRange(). 2070
• Wildcard attribute selector: Added support for the [*] element with any attribute selector. And also restored support for selecting by an empty attribute name prefix ([^]). 2079

Bug Fixes

• Mixed-cased source position: When tracking the source position of attributes, if the source attribute name was mix-cased but the parser was lower-case normalizing attribute names, the source position for that attribute was not tracked correctly. 2067
• Source position NPE: When tracking the source position of a body fragment parse, a null pointer exception was thrown. 2068
• Multi-point emoji entity: A multi-point encoded emoji entity may be incorrectly decoded to the replacement character. 2074
• Selector sub-expressions: (Regression) in a selector like parent [attr=va], other, the , OR was binding to [attr=va] instead of parent [attr=va], causing incorrect selections. The fix includes a EvaluatorDebug class that generates a sexpr to represent the query, allowing simpler and more thorough query parse tests. 2073
• XML CData output: When generating XML-syntax output from parsed HTML, script nodes containing (pseudo) CData sections would have an extraneous CData section added, causing script execution errors. Now, the data content is emitted in a HTML/XML/XHTML polyglot format, if the data is not already within a CData section. 2078
• Thread safety: The :has evaluator held a non-thread-safe Iterator, and so if an Evaluator object was shared across multiple concurrent threads, a NoSuchElement exception may be thrown, and the selected results may be incorrect. Now, the iterator object is a thread-local. 2088

Older changes for versions 0.1.1 (2010-Jan-31) through 1.17.1 (2023-Nov-27) may be found in change-archive.txt.

Aug 24, 2022

jsoup 1.15.3 is out now, and includes a security fix for potential XSS attacks, along with other improvements including more descriptive validation error messages. jsoup is a Java library for working with real-world HTML. It provides a very convenient API for extracting and manipulating data, using the best of HTML5 DOM methods and CSS selectors. Download jsoup now.

Security

• Fixed an issue where the jsoup cleaner may incorrectly sanitize crafted XSS attempts if SafeList.preserveRelativeLinks is enabled. See the security advisory for more details.

Improvements

• The Cleaner will preserve the source position of cleaned elements, if source tracking is enabled in the original parse.
• The error messages output from Validate are more descriptive. Exceptions are now ValidationExceptions (extending IllegalArgumentException ). Stack traces do not include the Validate class, to make it simpler to see where the exception originated. Common validation errors including malformed URLs and empty selector results have more explicit error messages.
• Build Improvement: added implementation version and related fields to the jar manifest. #1809

Bug Fixes

• The DataUtil would incorrectly read from InputStreams that emitted reads less than the requested size. This lead to incorrect results when parsing from chunked server responses, for example. #1807 My sincere thanks to everyone who contributed patches, suggestions, and bug reports. If you have any suggestions for the next release, I would love to hear them; please get in touch with me directly . You can also follow me ( @jhy ) on Twitter to receive occasional notes about jsoup releases.