This file lists all major changes in Werkzeug over the versions. For API breaking changes have a look at :ref:`api-changes`, they are listed there in detail.
- Old deprecations were removed.
- cached_property.writeable was deprecated.
- :meth:`BaseResponse.get_wsgi_headers` replaces the older BaseResponse.fix_headers method. The older method stays around for backwards compatibility reasons until 0.7.
- BaseResponse.header_list was deprecated. You should not need this function, get_wsgi_headers and the to_list method on the regular headers should serve as a replacement.
- Deprecated BaseResponse.iter_encoded's charset parameter.
- :class:`LimitedStream` non-silent usage was deprecated.
- Werkzeug switched away from wsgiref as library for the builtin webserver.
- The encoding parameter for :class:`Template`s is now called charset. The older one will work for another two versions but warn with a :exc:`DeprecationWarning`.
- The :class:`Client` has cookie support now which is enabled by default.
- :meth:`BaseResponse._get_file_stream` is now passed more parameters to make the function more useful. In 0.6 the old way to invoke the method will no longer work. To support both newer and older Werkzeug versions you can add all arguments to the signature and provide default values for each of them.
- :func:`url_decode` no longer supports both & and ; as separator. This has to be specified explicitly now.
- The request object is now enforced to be read-only for all attributes. If your code relies on modifications of some values makes sure to create copies of them using the mutable counterparts!
- Some data structures that were only used on request objects are now immutable as well. (:class:`Authorization` / :class:`Accept` and subclasses)
- CacheControl was splitted up into :class:`RequestCacheControl` and :class:`ResponseCacheControl`, the former being immutable. The old class will go away in 0.6
- undocumented werkzeug.test.File was replaced by :class:`FileWrapper`.
- it's not longer possible to pass dicts inside the data dict in :class:`Client`. Use tuples instead.
- It's save to modify the return value of :meth:`MultiDict.getlist` and methods that return lists in the :class:`MultiDict` now. The class creates copies instead of revealing the internal lists. However :class:`MultiDict.setlistdefault` still (and intentionally) returns the internal list for modifications.
- Werkzeug 0.3 will be the last release with Python 2.3 compatibility.
- The environ_property is now read-only by default. This decision was made because the request in general should be considered read-only.
- The BaseReporterStream is now part of the contrib module, the new module is werkzeug.contrib.reporterstream. Starting with 0.3, the old import will not work any longer.
- RequestRedirect now uses a 301 status code. Previously a 302 status code was used incorrectly. If you want to continue using this 302 code, use response = redirect(e.new_url, 302).
- lazy_property is now called cached_property. The alias for the old name will disappear in Werkzeug 0.3.
- match can now raise MethodNotAllowed if configured for methods and there was no method for that request.
- The response_body attribute on the response object is now called data. With Werkzeug 0.3 the old name will not work any longer.
- The file-like methods on the response object are deprecated. If you want to use the response object as file like object use the Response class or a subclass of BaseResponse and mix the new ResponseStreamMixin class and use response.stream.