• May 31, 2012
  • HTTP clients
  • HTTP Server
  • IOLoop and IOStream
  • tornado.options
  • tornado.template
  • tornado.web
  • Other modules

May 31, 2012

HTTP clients

• tornado.httpclient.HTTPClient now supports the same constructor keyword arguments as AsyncHTTPClient.
• The max_clients keyword argument to AsyncHTTPClient.configure now works.
• tornado.simple_httpclient now supports the OPTIONS and PATCH HTTP methods.
• tornado.simple_httpclient is better about closing its sockets instead of leaving them for garbage collection.
• tornado.simple_httpclient correctly verifies SSL certificates for URLs containing IPv6 literals (This bug affected Python 2.5 and 2.6).
• tornado.simple_httpclient no longer includes basic auth credentials in the Host header when those credentials are extracted from the URL.
• tornado.simple_httpclient no longer modifies the caller-supplied header dictionary, which caused problems when following redirects.
• tornado.curl_httpclient now supports client SSL certificates (using the same client_cert and client_key arguments as tornado.simple_httpclient)

HTTP Server

• HTTPServer now works correctly with paths starting with //
• HTTPHeaders.copy (inherited from dict.copy) now works correctly.
• HTTPConnection.address is now always the socket address, even for non-IP sockets. HTTPRequest.remote_ip is still always an IP-style address (fake data is used for non-IP sockets)
• Extra data at the end of multipart form bodies is now ignored, which fixes a compatibility problem with an iOS HTTP client library.

IOLoop and IOStream

• IOStream now has an error attribute that can be used to determine why a socket was closed.
• tornado.iostream.IOStream.read_until and read_until_regex are much faster with large input.
• IOStream.write performs better when given very large strings.
• IOLoop.instance() is now thread-safe.

tornado.options

• tornado.options options with multiple=True that are set more than once now overwrite rather than append. This makes it possible to override values set in parse_config_file with parse_command_line.
• tornado.options --help output is now prettier.
• tornado.options.options now supports attribute assignment.

tornado.template

• Template files containing non-ASCII (utf8) characters now work on Python 3 regardless of the locale environment variables.
• Templates now support else clauses in try/except/finally/else blocks.

tornado.web

• tornado.web.RequestHandler now supports the PATCH HTTP method. Note that this means any existing methods named patch in RequestHandler subclasses will need to be renamed.
• tornado.web.addslash and removeslash decorators now send permanent redirects (301) instead of temporary (302).
• RequestHandler.flush now invokes its callback whether there was any data to flush or not.
• Repeated calls to RequestHandler.set_cookie with the same name now overwrite the previous cookie instead of producing additional copies.
• tornado.web.OutputTransform.transform_first_chunk now takes and returns a status code in addition to the headers and chunk. This is a backwards-incompatible change to an interface that was never technically private, but was not included in the documentation and does not appear to have been used outside Tornado itself.
• Fixed a bug on python versions before 2.6.5 when tornado.web.URLSpec regexes are constructed from unicode strings and keyword arguments are extracted.
• The reverse_url function in the template namespace now comes from the RequestHandler rather than the Application. (Unless overridden, RequestHandler.reverse_url is just an alias for the Application method).
• The Etag header is now returned on 304 responses to an If-None-Match request, improving compatibility with some caches.
• tornado.web will no longer produce responses with status code 304 that also have entity headers such as Content-Length.

Other modules

• tornado.auth.FacebookGraphMixin no longer sends post_args redundantly in the url.
• The extra_params argument to tornado.escape.linkify may now be a callable, to allow parameters to be chosen separately for each link.
• tornado.gen no longer leaks StackContexts when a @gen.engine wrapped function is called repeatedly.
• tornado.locale.get_supported_locales no longer takes a meaningless cls argument.
• StackContext instances now have a deactivation callback that can be used to prevent further propagation.
• tornado.testing.AsyncTestCase.wait now resets its timeout on each call.
• tornado.wsgi.WSGIApplication now parses arguments correctly on Python 3.
• Exception handling on Python 3 has been improved; previously some exceptions such as UnicodeDecodeError would generate TypeErrors