releases/next

What's new in the next version of Tornado

In progress

* `tornado.util.import_object` now works with top-level module names that

do not contain a dot.

* `tornado.util.import_object` now consistently raises `ImportError`

instead of `AttributeError` when it fails.

* The ``handlers`` list passed to the `tornado.web.Application` constructor

and `~tornado.web.Application.add_handlers` methods can now contain

lists in addition to tuples and `~tornado.web.URLSpec` objects.

* `tornado.httpclient.HTTPRequest` takes a new argument ``auth_mode``,

which can be either ``basic`` or ``digest``. Digest authentication

is only supported with ``tornado.curl_httpclient``.

* `tornado.stack_context` has been rewritten and is now much faster.

* ``tornado.curl_httpclient`` no longer goes into an infinite loop when

pycurl returns a negative timeout.

* `tornado.testing.AsyncTestCase.wait` now raises the correct exception

when it has been modified by `tornado.stack_context`.

* `tornado.web.StaticFileHandler` now works on Windows when the client

passes an ``If-Modified-Since`` timestamp before 1970.

* `tornado.httpserver.HTTPServer` handles malformed HTTP headers more

gracefully.

* `tornado.auth.OAuthMixin` always sends ``oauth_version=1.0`` in its

request as required by the spec.

* Some reference cycles have been broken up (in `tornado.web.RequestHandler`

and `tornado.websocket.WebSocketHandler`), allowing for more efficient

garbage collection on CPython.