253 lines
10 KiB
ReStructuredText
253 lines
10 KiB
ReStructuredText
What's new in Tornado 3.1
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=========================
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Jun 15, 2013
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------------
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Multiple modules
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~~~~~~~~~~~~~~~~
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* Many reference cycles have been broken up throughout the package,
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allowing for more efficient garbage collection on CPython.
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* Silenced some log messages when connections are opened and immediately
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closed (i.e. port scans), or other situations related to closed
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connections.
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* Various small speedups: `.HTTPHeaders` case normalization, `.UIModule`
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proxy objects, precompile some regexes.
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`tornado.auth`
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~~~~~~~~~~~~~~
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* `~tornado.auth.OAuthMixin` always sends ``oauth_version=1.0`` in its
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request as required by the spec.
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* `~tornado.auth.FacebookGraphMixin` now uses ``self._FACEBOOK_BASE_URL``
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in `~.FacebookGraphMixin.facebook_request` to allow the base url to be
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overridden.
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* The ``authenticate_redirect`` and ``authorize_redirect`` methods in the
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`tornado.auth` mixin classes all now return Futures. These methods
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are asynchronous in `.OAuthMixin` and derived classes, although they
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do not take a callback. The `.Future` these methods return must be
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yielded if they are called from a function decorated with `.gen.coroutine`
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(but not `.gen.engine`).
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* `.TwitterMixin` now uses ``/account/verify_credentials`` to get information
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about the logged-in user, which is more robust against changing screen
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names.
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* The ``demos`` directory (in the source distribution) has a new
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``twitter`` demo using `.TwitterMixin`.
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`tornado.escape`
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~~~~~~~~~~~~~~~~
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* `.url_escape` and `.url_unescape` have a new ``plus`` argument (defaulting
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to True for consistency with the previous behavior) which specifies
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whether they work like `urllib.parse.unquote` or `urllib.parse.unquote_plus`.
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`tornado.gen`
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~~~~~~~~~~~~~
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* Fixed a potential memory leak with long chains of `tornado.gen` coroutines.
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`tornado.httpclient`
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~~~~~~~~~~~~~~~~~~~~
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* `tornado.httpclient.HTTPRequest` takes a new argument ``auth_mode``,
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which can be either ``basic`` or ``digest``. Digest authentication
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is only supported with ``tornado.curl_httpclient``.
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* ``tornado.curl_httpclient`` no longer goes into an infinite loop when
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pycurl returns a negative timeout.
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* ``curl_httpclient`` now supports the ``PATCH`` and ``OPTIONS`` methods
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without the use of ``allow_nonstandard_methods=True``.
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* Worked around a class of bugs in libcurl that would result in
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errors from `.IOLoop.update_handler` in various scenarios including
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digest authentication and socks proxies.
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* The ``TCP_NODELAY`` flag is now set when appropriate in ``simple_httpclient``.
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* ``simple_httpclient`` no longer logs exceptions, since those exceptions
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are made available to the caller as ``HTTPResponse.error``.
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`tornado.httpserver`
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~~~~~~~~~~~~~~~~~~~~
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* `tornado.httpserver.HTTPServer` handles malformed HTTP headers more
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gracefully.
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* `.HTTPServer` now supports lists of IPs in ``X-Forwarded-For``
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(it chooses the last, i.e. nearest one).
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* Memory is now reclaimed promptly on CPython when an HTTP request
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fails because it exceeded the maximum upload size.
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* The ``TCP_NODELAY`` flag is now set when appropriate in `.HTTPServer`.
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* The `.HTTPServer` ``no_keep_alive`` option is now respected with
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HTTP 1.0 connections that explicitly pass ``Connection: keep-alive``.
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* The ``Connection: keep-alive`` check for HTTP 1.0 connections is now
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case-insensitive.
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* The `str` and `repr` of `tornado.httpserver.HTTPRequest` no longer
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include the request body, reducing log spam on errors (and potential
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exposure/retention of private data).
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`tornado.httputil`
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~~~~~~~~~~~~~~~~~~
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* The cache used in `.HTTPHeaders` will no longer grow without bound.
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`tornado.ioloop`
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~~~~~~~~~~~~~~~~
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* Some `.IOLoop` implementations (such as ``pyzmq``) accept objects
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other than integer file descriptors; these objects will now have
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their ``.close()`` method called when the ``IOLoop` is closed with
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``all_fds=True``.
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* The stub handles left behind by `.IOLoop.remove_timeout` will now get
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cleaned up instead of waiting to expire.
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`tornado.iostream`
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~~~~~~~~~~~~~~~~~~
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* Fixed a bug in `.BaseIOStream.read_until_close` that would sometimes
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cause data to be passed to the final callback instead of the streaming
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callback.
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* The `.IOStream` close callback is now run more reliably if there is
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an exception in ``_try_inline_read``.
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* New method `.BaseIOStream.set_nodelay` can be used to set the
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``TCP_NODELAY`` flag.
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* Fixed a case where errors in ``SSLIOStream.connect`` (and
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``SimpleAsyncHTTPClient``) were not being reported correctly.
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`tornado.locale`
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~~~~~~~~~~~~~~~~
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* `.Locale.format_date` now works on Python 3.
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`tornado.netutil`
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~~~~~~~~~~~~~~~~~
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* The default `.Resolver` implementation now works on Solaris.
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* `.Resolver` now has a `~.Resolver.close` method.
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* Fixed a potential CPU DoS when ``tornado.netutil.ssl_match_hostname``
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is used on certificates with an abusive wildcard pattern.
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* All instances of `.ThreadedResolver` now share a single thread pool,
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whose size is set by the first one to be created (or the static
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``Resolver.configure`` method).
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* `.ExecutorResolver` is now documented for public use.
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* `.bind_sockets` now works in configurations with incomplete IPv6 support.
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`tornado.options`
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~~~~~~~~~~~~~~~~~
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* `tornado.options.define` with ``multiple=True`` now works on Python 3.
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* `tornado.options.options` and other `.OptionParser` instances support some
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new dict-like methods: `~.OptionParser.items()`, iteration over keys,
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and (read-only) access to options with square braket syntax.
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`.OptionParser.group_dict` returns all options with a given group
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name, and `.OptionParser.as_dict` returns all options.
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`tornado.process`
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~~~~~~~~~~~~~~~~~
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* `tornado.process.Subprocess` no longer leaks file descriptors into
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the child process, which fixes a problem in which the child could not
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detect that the parent process had closed its stdin pipe.
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* `.Subprocess.set_exit_callback` now works for subprocesses created
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without an explicit ``io_loop`` parameter.
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`tornado.stack_context`
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~~~~~~~~~~~~~~~~~~~~~~~
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* `tornado.stack_context` has been rewritten and is now much faster.
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* New function `.run_with_stack_context` facilitates the use of stack
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contexts with coroutines.
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`tornado.tcpserver`
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~~~~~~~~~~~~~~~~~~~
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* The constructors of `.TCPServer` and `.HTTPServer` now take a
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``max_buffer_size`` keyword argument.
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`tornado.template`
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~~~~~~~~~~~~~~~~~~
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* Some internal names used by the template system have been changed;
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now all "reserved" names in templates start with ``_tt_``.
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`tornado.testing`
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~~~~~~~~~~~~~~~~~
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* `tornado.testing.AsyncTestCase.wait` now raises the correct exception
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when it has been modified by `tornado.stack_context`.
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* `tornado.testing.gen_test` can now be called as ``@gen_test(timeout=60)``
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to give some tests a longer timeout than others.
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* The environment variable ``ASYNC_TEST_TIMEOUT`` can now be set to
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override the default timeout for `.AsyncTestCase.wait` and `.gen_test`.
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* `.bind_unused_port` now passes ``None`` instead of ``0`` as the port
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to ``getaddrinfo``, which works better with some unusual network
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configurations.
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`tornado.util`
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~~~~~~~~~~~~~~
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* `tornado.util.import_object` now works with top-level module names that
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do not contain a dot.
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* `tornado.util.import_object` now consistently raises `ImportError`
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instead of `AttributeError` when it fails.
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`tornado.web`
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~~~~~~~~~~~~~
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* The ``handlers`` list passed to the `tornado.web.Application` constructor
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and `~tornado.web.Application.add_handlers` methods can now contain
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lists in addition to tuples and `~tornado.web.URLSpec` objects.
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* `tornado.web.StaticFileHandler` now works on Windows when the client
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passes an ``If-Modified-Since`` timestamp before 1970.
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* New method `.RequestHandler.log_exception` can be overridden to
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customize the logging behavior when an exception is uncaught. Most
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apps that currently override ``_handle_request_exception`` can now
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use a combination of `.RequestHandler.log_exception` and
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`.write_error`.
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* `.RequestHandler.get_argument` now raises `.MissingArgumentError`
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(a subclass of `tornado.web.HTTPError`, which is what it raised previously)
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if the argument cannot be found.
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* `.Application.reverse_url` now uses `.url_escape` with ``plus=False``,
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i.e. spaces are encoded as ``%20`` instead of ``+``.
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* Arguments extracted from the url path are now decoded with
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`.url_unescape` with ``plus=False``, so plus signs are left as-is
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instead of being turned into spaces.
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* `.RequestHandler.send_error` will now only be called once per request,
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even if multiple exceptions are caught by the stack context.
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* The `tornado.web.asynchronous` decorator is no longer necessary for
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methods that return a `.Future` (i.e. those that use the `.gen.coroutine`
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or `.return_future` decorators)
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* `.RequestHandler.prepare` may now be asynchronous if it returns a
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`.Future`. The `~tornado.web.asynchronous` decorator is not used with
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``prepare``; one of the `.Future`-related decorators should be used instead.
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* ``RequestHandler.current_user`` may now be assigned to normally.
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* `.RequestHandler.redirect` no longer silently strips control characters
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and whitespace. It is now an error to pass control characters, newlines
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or tabs.
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* `.StaticFileHandler` has been reorganized internally and now has additional
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extension points that can be overridden in subclasses.
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* `.StaticFileHandler` now supports HTTP ``Range`` requests.
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`.StaticFileHandler` is still not suitable for files too large to
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comfortably fit in memory, but ``Range`` support is necessary in some
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browsers to enable seeking of HTML5 audio and video.
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* `.StaticFileHandler` now uses longer hashes by default, and uses the same
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hashes for ``Etag`` as it does for versioned urls.
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* `.StaticFileHandler.make_static_url` and `.RequestHandler.static_url`
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now have an additional keyword argument ``include_version`` to suppress
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the url versioning.
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* `.StaticFileHandler` now reads its file in chunks, which will reduce
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memory fragmentation.
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* Fixed a problem with the ``Date`` header and cookie expiration dates
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when the system locale is set to a non-english configuration.
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`tornado.websocket`
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~~~~~~~~~~~~~~~~~~~
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* `.WebSocketHandler` now catches `.StreamClosedError` and runs
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`~.WebSocketHandler.on_close` immediately instead of logging a
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stack trace.
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* New method `.WebSocketHandler.set_nodelay` can be used to set the
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``TCP_NODELAY`` flag.
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`tornado.wsgi`
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~~~~~~~~~~~~~~
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* Fixed an exception in `.WSGIContainer` when the connection is closed
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while output is being written.
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