rkh / async-rack Goto Github PK

When I start this simple server, I get an error: Server handler (thin) not found. (RuntimeError)

require 'async-rack'
require 'sinatra'

set :server, 'thin'

get '/' do
  "Hello, world!"
end

If I comment out the require 'async-rack' line, it starts Thin fine. If I comment out the set :server, 'thin' and use async-rack, it starts WEBrick.

[1] pry(main)> require 'async-rack'
=> true
[2] pry(main)> require 'rack/head'
NameError: uninitialized constant Rack::Head
from /Users/jonas/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/async-rack-0.5.1/lib/async_rack/async_callback.rb:7:in `const_get'
[3] pry(main)> Rack::Head
=> AsyncRack::Head

What am I doing wrong?
Bonus:

# inserted by me before line 7 of async-rack-0.5.1/lib/async_rack/async_callback.rb
puts [namespace.constants.include?(name), namespace.const_defined?(name)]
# => [true, false]

Here are a few issues I found with current approach to ruby async web stack (or lack of one), including this gem:

• Rack is not designed with async in mind.
• An awesome hack is still a hack, not a solution.
• Confuse developers. Some middlewares are async, some are not.
• throw :async scares me.
• Various bugs and unexpected behaviors make development a pain.

Why we need a separate rack-like API for async web apps:

• Can be designed to be async from ground up.
• No hacks.
• Allow future async web frameworks and async app servers to integrate and grow.
• A very important piece in any web stack.
• Leads to more friendly development experience.

P.s. Sorry for putting this here as an issue, I couldn't find any discussion about this possibility anywhere, so I'm trying to see if other people's opinions on this idea.