Announcing Tornado 2.0

Ben Darnell

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Jun 22, 2011, 1:59:01 AM6/22/11

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We are pleased to announce the release of Tornado 2.0, available from

https://github.com/downloads/facebook/tornado/tornado-2.0.tar.gz

Major changes:

* Template output is automatically escaped by default; see backwards

compatibility note below.

* The default AsyncHTTPClient implementation is now simple_httpclient.

* Python 3.2 is now supported.

Backwards compatibility:

* Template autoescaping is enabled by default. Applications upgrading from

a previous release of Tornado must either disable autoescaping or adapt

their templates to work with it. For most applications, the simplest

way to do this is to pass autoescape=None to the Application constructor.

* Applications that wish to continue using curl_httpclient instead of

simple_httpclient may do so by calling

AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")

at the beginning of the process. Users of Python 2.5 will probably want

to use curl_httpclient as simple_httpclient only supports ssl on Python 2.6+.

* Python 3 compatibility involved many changes throughout the codebase,

so users are encouraged to test their applications more thoroughly than

usual when upgrading to this release.

Other changes in this release:

* Templates support several new directives:

- {% autoescape ...%} to control escaping behavior

- {% raw ... %} for unescaped output

- {% module ... %} for calling UIModules

* {% module Template(path, **kwargs) %} may now be used to call another

template with an independent namespace

* All IOStream callbacks are now run directly on the IOLoop via add_callback.

* HTTPServer now supports IPv6 where available. To disable, pass

family=socket.AF_INET to HTTPServer.bind().

* HTTPClient now supports IPv6, configurable via allow_ipv6=bool on the

HTTPRequest. allow_ipv6 defaults to false on simple_httpclient and true

on curl_httpclient.

* RequestHandlers can use an encoding other than utf-8 for query parameters

by overriding decode_argument()

* Performance improvements, especially for applications that use a lot of

IOLoop timeouts

* HTTP OPTIONS method no longer requires an XSRF token.

* JSON output (RequestHandler.write(dict)) now sets Content-Type to

application/json

* Etag computation can now be customized or disabled by overriding

RequestHandler.compute_etag

* USE_SIMPLE_HTTPCLIENT environment variable is no longer supported.

Use AsyncHTTPClient.configure instead.

Many thanks to everyone who contributed patches, bug reports, and feedback

that went into this release!

-Ben

Ben Darnell

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Jun 22, 2011, 2:10:03 AM6/22/11

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In addition to the new release, the website at http://www.tornadoweb.org has had some major updates, with comprehensive documentation extracted from docstrings.

-Ben

Jeremy Kelley

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Jun 22, 2011, 2:14:35 AM6/22/11

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Ben et al,

Thank you for all the work that's gone into Tornado.

This is great!!

-jeremy

--
The Christian ideal has not been tried and found wanting;
it has been found difficult and left untried – G. K. Chesterton

Felinx Lee

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Jun 22, 2011, 2:17:30 AM6/22/11

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Thanks Ben, the new web site looks great.

--
What can change the nature of a man?(Planescape Torment)
----------------------------------------------------------------------------------------
http://feilong.me Felinx Lee's Blog (Chinese Only)
http://www.zhimaq.com IT Q&A (Chinese Only)
http://poweredsites.org What powered your sites? PHP, Ruby or Python?

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Jun 22, 2011, 5:13:41 AM6/22/11

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Great job! Thx!

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Jun 22, 2011, 9:16:19 PM6/22/11

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Nice! Thx Ben.

2011/6/23 Josh Marshall <catc...@gmail.com>

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HengZhou
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Krzysztof Tarnowski

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Jun 23, 2011, 8:03:35 AM6/23/11

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Tornado 2.0 is awesome. Thanks, Ben!

Bang Nguyen

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Jun 23, 2011, 11:18:04 AM6/23/11

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Thanks for your hard work!

Micheál Keane

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Jun 23, 2011, 11:30:04 AM6/23/11

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I really like the new doc pages as well.

They truncate in Safari on the iPhone 3GS though. It's really weird.
It looks like the page just stops loading.

Washington, DC USA
ffaris...@gmail.com

On Wed, Jun 22, 2011 at 6:52 PM, Didip Kerabat <did...@gmail.com> wrote:

Jason Huang

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Jun 23, 2011, 12:38:47 PM6/23/11

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The new docs pages are awsome! Thanks!

2011/6/23 Micheál Keane <ffaris...@gmail.com>

Ben Darnell

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Jun 23, 2011, 2:01:41 PM6/23/11

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2011/6/23 Micheál Keane <ffaris...@gmail.com>

I really like the new doc pages as well.

They truncate in Safari on the iPhone 3GS though. It's really weird.
It looks like the page just stops loading.

They're actually loaded correctly, it's just that the fixed navigation elements mess up scrolling. If you scroll with two fingers instead of one, it works.

-Ben

Bill Janssen

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Jun 24, 2011, 8:55:00 PM6/24/11

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Thanks for the Etag change, Ben.

Love the new docs!

Bill

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