rainbows.git  about / heads / tags
Unicorn for sleepy apps and slow clients
$ git log --pretty=format:'%h %s (%cs)%d' v0.90.1 --
d541fd3 Rainbows! 0.90.1 (2009-12-30)
	(tag: v0.90.1)
c5a3c62 update TODO (2009-12-30)
96fbc5e EventMachine: support deferrables in responses (2009-12-30)
44a80df gemspec: clamp down unicorn dependency to < 0.97.0 (2009-12-29)
31ee6b4 quiet spurious wakeups for accept() in Thread* models (2009-12-29)
d5375f5 doc: update manpage since Unicorn got new features (2009-12-24)
831e0b2 gemspec: loosen Unicorn dependency (2009-12-22)
0df219e Rainbows! 0.90.0 (2009-12-22)
	(tag: v0.90.0)
8a15fc1 avoid setting "rainbows.autochunk" by default (2009-12-22)
ca4c0b2 base: fix constant resolution under 1.8 for 1.8 bugfix (2009-12-22)
...

$ git cat-file blob v0.90.1:README
= Rainbows! Unicorn for sleepy apps and slow clients

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.

== \Rainbows! is about Diversity

We aim to support as many concurrency models as we can because they all
suck; differently.

For network concurrency, models we currently support are:

* {RevFiberSpawn}[link:Rainbows/RevFiberSpawn.html]
* {Revactor}[link:Rainbows/Revactor.html]
* {ThreadPool}[link:Rainbows/ThreadPool.html]
* {Rev}[link:Rainbows/Rev.html]
* {ThreadSpawn}[link:Rainbows/ThreadSpawn.html]
* {EventMachine}[link:Rainbows/EventMachine.html]
* {RevThreadSpawn}[link:Rainbows/RevThreadSpawn.html]
* {FiberSpawn}[link:Rainbows/FiberSpawn.html]
* {FiberPool}[link:Rainbows/FiberPool.html]
* {NeverBlock}[link:Rainbows/NeverBlock.html]
* {RevThreadPool}[link:Rainbows/RevThreadPool.html]

We have {many more on the way}[link:TODO.html] for handling network
concurrency.  Additionally, we also use multiple processes (managed by
Unicorn) for robustness and CPU/memory/disk concurrency.

We also provide Rainbows::AppPool Rack middleware for some network
concurrency models for limiting application concurrency independently of
network concurrency.

== Features

* Designed for {Rack}[http://rack.rubyforge.org/], the standard for
  modern Ruby HTTP applications.

* Built on {Unicorn}[http://unicorn.bogomips.org/], inheriting its
  process/socket management features such as transparent upgrades and
  Ruby configuration DSL.

* As with Unicorn, it is able to stream large request bodies off the
  socket to the application while the client is still uploading.  Since
  \Rainbows! can handle slow clients, this feature is more useful than
  it is with Unicorn.

* Combines heavyweight concurrency (worker processes) with lightweight
  concurrency (Events/Fibers/Actors/Threads), allowing CPU/memory/disk to
  be scaled independently of client connections.  More concurrency models
  (listed in the TODO) will be supported as we find time for them.

* We give you {lots of options}[link:Summary.html] with more
  {on the way}[link:TODO.html].

== Applications

\Rainbows is mainly designed for the odd things Unicorn sucks at:

* Web Sockets (via {Sunshowers}[http://rainbows.rubyforge.org/sunshowers/])
* 3rd-party APIs (to services outside your control/LAN)
* OpenID consumers (to providers outside your control/LAN)
* Reverse proxy implementations with editing/censoring
  (to upstreams outside your control/LAN)
* Comet
* BOSH (with slow clients)
* HTTP server push
* Long polling
* Reverse AJAX
* real-time upload processing (via {upr}[http://upr.bogomips.org/])

\Rainbows can also be used to service slow clients directly even with
fast applications.

== License

\Rainbows! is copyright 2009 by all contributors (see logs in git).
It is based on Mongrel and Unicorn and carries the same license.

Mongrel is copyright 2007 Zed A. Shaw and contributors. It is licensed
under the Ruby license and the GPL2. See the included LICENSE file for
details.

\Rainbows! is 100% Free Software.

== Install

You may download the tarball from the Rainbows project page on Rubyforge
and run setup.rb after unpacking it:

http://rubyforge.org/frs/?group_id=8977

You may also install it via RubyGems on Gemcutter:

  gem install rainbows

== Usage

=== for Rack applications

In APP_ROOT (where config.ru is located), run:

  rainbows

\Rainbows! will bind to all interfaces on TCP port 8080 by default.

=== Configuration File(s)

\Rainbows! will look for the config.ru file used by rackup in APP_ROOT.

For deployments, it can use a config file for Unicorn and
\Rainbows!-specific options specified by the +--config-file/-c+
command-line switch.  \Rainbows! accepts all options found in
{Unicorn::Configurator}[http://unicorn.bogomips.org/Unicorn/Configurator.html]
as well as the "\Rainbows!" block, so you can have the following in your
config file:

    worker_processes 4 # assuming four CPU cores
    Rainbows! do
      use :FiberSpawn
      worker_connections 100
    end

See the {Rainbows! configuration documentation}[link:Rainbows.html#M000001]
for more details.

== Development

You can get the latest source via git from the following locations
(these versions may not be stable):

  git://git.bogomips.org/rainbows.git
  git://repo.or.cz/rainbows.git (mirror)

You may browse the code from the web and download the latest snapshot
tarballs here:

* http://git.bogomips.org/cgit/rainbows.git (cgit)
* http://repo.or.cz/w/rainbows.git (gitweb)

Inline patches (from "git format-patch") to the mailing list are
preferred because they allow code review and comments in the reply to
the patch.

We will adhere to mostly the same conventions for patch submissions as
git itself.  See the Documentation/SubmittingPatches document
distributed with git on on patch submission guidelines to follow.  Just
don't email the git mailing list or maintainer with \Rainbows! patches.

== Disclaimer

There is NO WARRANTY whatsoever if anything goes wrong, but let us know
and we'll try our best to fix it.

== Contact

All feedback (bug reports, user/development discussion, patches, pull
requests) go to the mailing list/newsgroup.  Patches must be sent inline
(git format-patch -M + git send-email).  No subscription is necessary
to post on the mailing list.  No top posting.  Address replies +To:+
the mailing list.

* email: mailto:rainbows-talk@rubyforge.org
* nntp: nntp://news.gmane.org/gmane.comp.lang.ruby.rainbows.general
* subscribe: http://rubyforge.org/mailman/listinfo/rainbows-talk
* archives: http://rubyforge.org/pipermail/rainbows-talk

# heads (aka `branches'):
$ git for-each-ref --sort=-creatordate refs/heads \
	--format='%(HEAD) %(refname:short) %(subject) (%(creatordate:short))'
* master       Rainbows! 5.2.1 (2020-01-29)
  em-deferred  eventmachine: wait for deferred actions to finish (2017-01-09)

# tags:
$ git for-each-ref --sort=-creatordate refs/tags \
	--format='%(refname:short) %(subject) (%(creatordate:short))'
v5.2.1       Rainbows! 5.2.1 (2020-01-29) tar.gz
v5.2.0       Rainbows! 5.2.0 (2019-01-05) tar.gz
v5.1.1       Rainbows! 5.1.1 (2017-04-02) tar.gz
v5.1.0       Rainbows! 5.1.0 - rack 2.x compat, EM fixes (2017-01-12) tar.gz
v5.0.0       Rainbows! 5.0.0 - maintained as long as anybody uses it! (2015-11-25) tar.gz
v4.7.0       Rainbows! 4.7.0 - updates for ruby 2.3.0dev (2015-10-19) tar.gz
v4.6.2       Rainbows! 4.6.2 - see you on the other side (2014-05-12) tar.gz
v4.6.1       rainbows 4.6.1 - EventMachine fixes (2014-02-02) tar.gz
v4.6.0       Rainbows! 4.6.0 - fix unicorn 4.8.0 compatibility (2014-01-17) tar.gz
v4.5.0       Rainbows! 4.5.0 - hijacking support (2013-02-27) tar.gz
...

# associated public inboxes:
# (number on the left is used for dev purposes)
            https://yhbt.net/rainbows-public

git clone https://yhbt.net/rainbows.git