\This is a fork of Unicorn designed to run on Heroku. Heroku and Unicorn disagree on signal handling, so I've swapped Unicorn's handling of SIGINT/SIGTERM and SIGQUIT. Now, Unicorn can shut down gracefully on Heroku.

Unicorn, but with patch for h12 timeouts on heroku

Rack middleware to remove "HTTP_X_FORWARDED_FOR" in the Rack environment and replace "REMOTE_ADDR" with the value of the original client address.

Zbatery is an HTTP server for Rack applications on systems that either do not support fork(), or have no memory (nor need) to run the master/worker model. It is based on Rainbows! (which is based on Unicorn (which is based on Mongrel)) and inherits parts of each. Zbatery supports your choice of all the thread/fiber/event/actor-based concurrency models and Rack middleware that Rainbows! supports (or will ever support) in a single process.