Html5

~~~~~

Released on July 24, 2013

* Removed ``RecursiveTreeWalker`` from ``treewalkers._base``. Any
implementation using it should be moved to
``NonRecursiveTreeWalker``, as everything bundled with html5lib has
for years.

* Fix 67 so that ``BufferedStream`` to correctly returns a bytes
object, thereby fixing any case where html5lib is passed a
non-seekable RawIOBase-like object.

~~~~~

Released on June 27, 2013

* Removed reordering of attributes within the serializer. There is now
an ``alphabetical_attributes`` option which preserves the previous
behaviour through a new filter. This allows attribute order to be
preserved through html5lib if the tree builder preserves order.

* Removed ``dom2sax`` from DOM treebuilders. It has been replaced by
``treeadapters.sax.to_sax`` which is generic and supports any
treewalker; it also resolves all known bugs with ``dom2sax``.

* Fix treewalker assertions on hitting bytes strings on
Python 2. Previous to 1.0b1, treewalkers coped with mixed
bytes/unicode data on Python 2; this reintroduces this prior
behaviour on Python 2. Behaviour is unchanged on Python 3.

~~~~~

Released on May 17, 2013

* Implementation updated to implement the `HTML specification
<http://www.whatwg.org/specs/web-apps/current-work/>`_ as of 5th May
2013 (`SVN <http://svn.whatwg.org/webapps/>`_ revision r7867).

* Python 3.2+ supported in a single codebase using the ``six`` library.

* Removed support for Python 2.5 and older.

* Removed the deprecated Beautiful Soup 3 treebuilder.
``beautifulsoup4`` can use ``html5lib`` as a parser instead. Note that
since it doesn't support namespaces, foreign content like SVG and
MathML is parsed incorrectly.

* Removed ``simpletree`` from the package. The default tree builder is
now ``etree`` (using the ``xml.etree.cElementTree`` implementation if
available, and ``xml.etree.ElementTree`` otherwise).

* Removed the ``XHTMLSerializer`` as it never actually guaranteed its
output was well-formed XML, and hence provided little of use.

* Removed default DOM treebuilder, so ``html5lib.treebuilders.dom`` is no
longer supported. ``html5lib.treebuilders.getTreeBuilder("dom")`` will
return the default DOM treebuilder, which uses ``xml.dom.minidom``.

* Optional heuristic character encoding detection now based on
``charade`` for Python 2.6 - 3.3 compatibility.

* Optional ``Genshi`` treewalker support fixed.

* Many bugfixes, including:

* 33: null in attribute value breaks XML AttValue;

* 4: nested, indirect descendant, <button> causes infinite loop;

* `Google Code 215
<http://code.google.com/p/html5lib/issues/detail?id=215>`_: Properly
detect seekable streams;

* `Google Code 206
<http://code.google.com/p/html5lib/issues/detail?id=206>`_: add
support for <video preload=...>, <audio preload=...>;

* `Google Code 205
<http://code.google.com/p/html5lib/issues/detail?id=205>`_: add
support for <video poster=...>;

* `Google Code 202
<http://code.google.com/p/html5lib/issues/detail?id=202>`_: Unicode
file breaks InputStream.

* Source code is now mostly PEP 8 compliant.

* Test harness has been improved and now depends on ``nose``.

* Documentation updated and moved to https://html5lib.readthedocs.io/.

~~~~~~~~~~~~~~~~~~

Released on July 15, 2016

* Fix attribute order going to the tree builder to be document order
instead of reverse document order(!).

~~~~~~~~~~~~~~~~

Released on July 14, 2016

* **Added ordereddict as a mandatory dependency on Python 2.6.**

* Added ``lxml``, ``genshi``, ``datrie``, ``charade``, and ``all``
extras that will do the right thing based on the specific
interpreter implementation.

* Now requires the ``mock`` package for the testsuite.

* Cease supporting DATrie under PyPy.

* **Remove ``PullDOM`` support, as this hasn't ever been properly
tested, doesn't entirely work, and as far as I can tell is
completely unused by anyone.**

* Move testsuite to ``py.test``.

* **Fix 124: move to webencodings for decoding the input byte stream;
this makes html5lib compliant with the Encoding Standard, and
introduces a required dependency on webencodings.**

* **Cease supporting Python 3.2 (in both CPython and PyPy forms).**

* **Fix comments containing double-dash with lxml 3.5 and above.**

* **Use scripting disabled by default (as we don't implement
scripting).**

* **Fix 11, avoiding the XSS bug potentially caused by serializer
allowing attribute values to be escaped out of in old browser versions,
changing the quote_attr_values option on serializer to take one of
three values, "always" (the old True value), "legacy" (the new option,
and the new default), and "spec" (the old False value, and the old
default).**

* **Fix 72 by rewriting the sanitizer to apply only to treewalkers
(instead of the tokenizer); as such, this will require amending all
callers of it to use it via the treewalker API.**

* **Drop support of charade, now that chardet is supported once more.**

* **Replace the charset keyword argument on parse and related methods
with a set of keyword arguments: override_encoding, transport_encoding,
same_origin_parent_encoding, likely_encoding, and default_encoding.**

* **Move filters._base, treebuilder._base, and treewalkers._base to .base
to clarify their status as public.**

* **Get rid of the sanitizer package. Merge sanitizer.sanitize into the
sanitizer.htmlsanitizer module and move that to saniziter. This means
anyone who used sanitizer.sanitize or sanitizer.HTMLSanitizer needs no
code changes.**

* **Rename treewalkers.lxmletree to .etree_lxml and
treewalkers.genshistream to .genshi to have a consistent API.**

* Move a whole load of stuff (inputstream, ihatexml, trie, tokenizer,
utils) to be underscore prefixed to clarify their status as private.

~~~~~~~~~~~~~~~

Released on September 10, 2015

* Fix 195: fix the sanitizer to drop broken URLs (it threw an
exception between 0.9999 and 0.999999).