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From: Eric Wong on 4 May 2010 18:50
Rainbows! is an HTTP server for sleepy Rack applications. It is based on
Unicorn, but designed to handle applications that expect long
request/response times and/or slow clients. For Rack applications not
heavily bound by slow external network dependencies, consider Unicorn
instead as it simpler and easier to debug.

* http://rainbows.rubyforge.org/
* rainbows-talk(a)rubyforge.org
* git://git.bogomips.org/rainbows.git

Changes:

Mostly internal cleanups and small improvements.

The only backwards incompatible change was the addition of the
"client_max_body_size" parameter to limit upload sizes to
prevent DoS. This defaults to one megabyte (same as nginx), so
any apps relying on the limit-less behavior of previous will
have to configure this in the Unicorn/Rainbows! config file:

Rainbows! do
# nil for unlimited, or any number in bytes
client_max_body_size nil
end

The ThreadSpawn and ThreadPool models are now optimized for serving
large static files under Ruby 1.9 using IO.copy_stream[1].

The EventMachine model has always had optimized static file
serving (using EM::Connection#stream_file_data[2]).

The EventMachine model (finally) gets conditionally deferred app
dispatch in a separate thread, as described by Ezra Zygmuntowicz
for Merb, Ebb and Thin[3].

[1] - http://euruko2008.csrug.cz/system/assets/documents/0000/0007/tanaka-IOcopy_stream-euruko2008.pdf
[2] - http://eventmachine.rubyforge.org/EventMachine/Connection.html#M000312
[3] - http://brainspl.at/articles/2008/04/18/deferred-requests-with-merb-ebb-and-thin

--
Eric Wong

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