What’s new in Tornado 2.4¶

Sep 4, 2012¶

Removed max_simultaneous_connections argument from tornado.httpclient (both implementations). This argument hasn’t been useful for some time (if you were using it you probably want max_clients instead)
tornado.simple_httpclient now accepts and ignores HTTP 1xx status responses.

Fixed a bug introduced in 2.3 that would cause IOStream close callbacks to not run if there were pending reads.
Improved error handling in SSLIOStream and SSL-enabled TCPServer.
SSLIOStream.get_ssl_certificate now has a binary_form argument which is passed to SSLSocket.getpeercert.
SSLIOStream.write can now be called while the connection is in progress, same as non-SSL IOStream (but be careful not to send sensitive data until the connection has completed and the certificate has been verified).
IOLoop.add_handler cannot be called more than once with the same file descriptor. This was always true for epoll, but now the other implementations enforce it too.
On Windows, TCPServer uses SO_EXCLUSIVEADDRUSER instead of SO_REUSEADDR.

{% break %} and {% continue %} can now be used looping constructs in templates.
It is no longer an error for an if/else/for/etc block in a template to have an empty body.

New class tornado.testing.AsyncHTTPSTestCase is like AsyncHTTPTestCase. but enables SSL for the testing server (by default using a self-signed testing certificate).
tornado.testing.main now accepts additional keyword arguments and forwards them to unittest.main.

New method RequestHandler.get_template_namespace can be overridden to add additional variables without modifying keyword arguments to render_string.
RequestHandler.add_header now works with WSGIApplication.
RequestHandler.get_secure_cookie now handles a potential error case.
RequestHandler.__init__ now calls super().__init__ to ensure that all constructors are called when multiple inheritance is used.
Docs have been updated with a description of all available Application settings

OAuthMixin now accepts "oob" as a callback_uri.
OpenIdMixin now also returns the claimed_id field for the user.
tornado.platform.twisted shutdown sequence is now more compatible.
The logging configuration used in tornado.options is now more tolerant of non-ascii byte strings.