Tornado 3.2 新特性¶

Tornado now depends on the backports.ssl_match_hostname whenrunning on Python 2. This will be installed automatically when using pipor easy_install
Tornado now includes an optional C extension module, which greatly improvesperformance of websockets. This extension will be built automaticallyif a C compiler is found at install time.

Added support authentication to Google serviceswith OAuth 2 instead of OpenID and OAuth 1.
FacebookGraphMixin has been updated to use the current Facebook loginURL, which saves a redirect.

TracebackFuture now accepts a timeout keyword argument (althoughit is still incorrect to use a non-zero timeout in non-blocking code).

tornado.curl_httpclient now works on Python 3 with thesoon-to-be-released pycurl 7.19.3, which will officially supportPython 3 for the first time. Note that there are some unofficialPython 3 ports of pycurl (Ubuntu has included one for its pastseveral releases); these are not supported for use with Tornado.

Coroutines may now yield dicts in addition to lists to wait formultiple tasks in parallel.
Improved performance of tornado.gen when yielding a that isalready done.

now uses property setters so thatsetting attributes after construction applies the same conversionsas init (e.g. converting the body attribute to bytes).

Malformed x-www-form-urlencoded request bodies will now log a warningand continue instead of causing the request to fail (similar to the existinghandling of malformed multipart/form-data bodies. This is done mainlybecause some libraries send this content type by default even when the datais not form-encoded.
Fix some error messages for unix sockets (and other non-IP sockets)

IOLoop now uses consistently forerror logging.
IOLoop now frees callback objects earlier, reducing memory usagewhile idle.
will no longer call logging.basicConfig if there is a handlerdefined for the root logger or for the tornado or tornado.applicationloggers (previously it only looked at the root logger).

IOStream now recognizes ECONNABORTED error codes in more places(which was mainly an issue on Windows).
now frees memory earlier if a connection is closed whilethere is data in the write buffer.
PipeIOStream now handles EAGAIN error codes correctly.
now initiates the SSL handshake automatically withoutwaiting for the application to try and read or write to the connection.
Swallow a spurious exception from set_nodelay when a connectionhas been reset.

Fix an error from tornado.log.enable_pretty_logging when does not have an isatty method.
tornado.log.LogFormatter now accepts keyword arguments fmtand datefmt.

simple_httpclient now applies the connect_timeout to requeststhat are queued and have not yet started.
On Python 2.6, simple_httpclient now uses TLSv1 instead of SSLv3.
simple_httpclient now enforces the connect timeout during DNS resolution.
The embedded ca-certificates.crt file has been updated with the currentMozilla CA list.

StaticFileHandler no longer fails if the client requests a Range thatis larger than the entire file (Facebook has a crawler that does this).
now works correctly on subsequentrequests of a keep-alive connection.
New application setting default_handler_class can be used to easilyset up custom 404 pages.
New application settings autoreload, compiled_template_cache,static_hash_cache, and serve_traceback can be used to controlindividual aspects of debug mode.
New methods RequestHandler.get_query_argument and and new attributesHTTPRequest.query_arguments and HTTPRequest.body_arguments allow accessto arguments without intermingling those from the query string with thosefrom the request body.
RequestHandler.decode_argument and related methods now raisean HTTPError(400) instead of when theargument could not be decoded.
RequestHandler.clear_all_cookies now accepts domain and patharguments, just like .
It is now possible to specify handlers by name when using the URLSpecclass.
now accepts 4-tuples to specify the name parameter(which previously required constructing a URLSpec object instead ofa tuple).
Fixed an incorrect error message when handler methods return a valueother than None or a Future.
Exceptions will no longer be logged twice when using both @gen.coroutine

now raises WebSocketClosedError insteadof when the connection has been closed.
websocket_connect now accepts preconstructed HTTPRequest objects.
Fix a bug with when used with some proxies thatunconditionally modify the Connection header.
websocket_connect now returns an error immediately for refused connectionsinstead of waiting for the timeout.
now has a close method.

now calls the iterable’s close() method even ifan error is raised, in compliance with the spec.