### Navigation - [index](# "General Index") - [modules](# "Python Module Index") | - [next](# "What鈥檚 new in Tornado 1.1.1") | - [previous](# "What鈥檚 new in Tornado 1.2.1") | - [Tornado 4.4.dev1 documentation](#) » - [Release notes](#) » # What's new in Tornado 1.2 ### Feb 20, 2011 ~~~ We are pleased to announce the release of Tornado 1.2, available from https://github.com/downloads/facebook/tornado/tornado-1.2.tar.gz Backwards compatibility notes: * This release includes the backwards-incompatible security change from version 1.1.1. Users upgrading from 1.1 or earlier should read the release notes from that release: http://groups.google.com/group/python-tornado/browse_thread/thread/b36191c781580cde * StackContexts that do something other than catch exceptions may need to be modified to be reentrant. https://github.com/tornadoweb/tornado/commit/7a7e24143e77481d140fb5579bc67e4c45cbcfad * When XSRF tokens are used, the token must also be present on PUT and DELETE requests (anything but GET and HEAD) New features: * A new HTTP client implementation is available in the module tornado.simple_httpclient. This HTTP client does not depend on pycurl. It has not yet been tested extensively in production, but is intended to eventually replace the pycurl-based HTTP client in a future release of Tornado. To transparently replace tornado.httpclient.AsyncHTTPClient with this new implementation, you can set the environment variable USE_SIMPLE_HTTPCLIENT=1 (note that the next release of Tornado will likely include a different way to select HTTP client implementations) * Request logging is now done by the Application rather than the RequestHandler. Logging behavior may be customized by either overriding Application.log_request in a subclass or by passing log_function as an Application setting * Application.listen(port): Convenience method as an alternative to explicitly creating an HTTPServer * tornado.escape.linkify(): Wrap urls in <a> tags * RequestHandler.create_signed_value(): Create signatures like the secure_cookie methods without setting cookies. * tornado.testing.get_unused_port(): Returns a port selected in the same way as inAsyncHTTPTestCase * AsyncHTTPTestCase.fetch(): Convenience method for synchronous fetches * IOLoop.set_blocking_signal_threshold(): Set a callback to be run when the IOLoop is blocked. * IOStream.connect(): Asynchronously connect a client socket * AsyncHTTPClient.handle_callback_exception(): May be overridden in subclass for custom error handling * httpclient.HTTPRequest has two new keyword arguments, validate_cert and ca_certs. Setting validate_cert=False will disable all certificate checks when fetching https urls. ca_certs may be set to a filename containing trusted certificate authorities (defaults will be used if this is unspecified) * HTTPRequest.get_ssl_certificate(): Returns the client's SSL certificate (if client certificates were requested in the server's ssl_options * StaticFileHandler can be configured to return a default file (e.g. index.html) when a directory is requested * Template directives of the form "{% from x import y %}" are now supported (in addition to the existing support for "{% import x %}" * FacebookGraphMixin.get_authenticated_user now accepts a new parameter 'extra_fields' which may be used to request additional information about the user Bug fixes: * auth: Fixed KeyError with Facebook offline_access * auth: Uses request.uri instead of request.path as the default redirect so that parameters are preserved. * escape: xhtml_escape() now returns a unicode string, not utf8-encoded bytes * ioloop: Callbacks added with add_callback are now run in the order they were added * ioloop: PeriodicCallback.stop can now be called from inside the callback. * iostream: Fixed several bugs in SSLIOStream * iostream: Detect when the other side has closed the connection even with the select()-based IOLoop * iostream: read_bytes(0) now works as expected * iostream: Fixed bug when writing large amounts of data on windows * iostream: Fixed infinite loop that could occur with unhandled exceptions * httpclient: Fix bugs when some requests use proxies and others don't * httpserver: HTTPRequest.protocol is now set correctly when using the built-in SSL support * httpserver: When using multiple processes, the standard library's random number generator is re-seeded in each child process * httpserver: With xheaders enabled, X-Forwarded-Proto is supported as an alternative to X-Scheme * httpserver: Fixed bugs in multipart/form-data parsing * locale: format_date() now behaves sanely with dates in the future * locale: Updates to the language list * stack_context: Fixed bug with contexts leaking through reused IOStreams * stack_context: Simplified semantics and improved performance * web: The order of css_files from UIModules is now preserved * web: Fixed error with default_host redirect * web: StaticFileHandler works when os.path.sep != '/' (i.e. on Windows) * web: Fixed a caching-related bug in StaticFileHandler when a file's timestamp has changed but its contents have not. * web: Fixed bugs with HEAD requests and e.g. Etag headers * web: Fix bugs when different handlers have different static_paths * web: @removeslash will no longer cause a redirect loop when applied to the root path * websocket: Now works over SSL * websocket: Improved compatibility with proxies Many thanks to everyone who contributed patches, bug reports, and feedback that went into this release! -Ben ~~~ © Copyright 2009-2016, The Tornado Authors. 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