From: Eric Hodel <drbrain@...7.net>
Date: 2011-07-23T07:48:22+09:00
Subject: Re: open localhost url

On Jul 22, 2011, at 2:46 PM, Hassan Schroeder wrote:
> Not using Webrick  -- that's a single-threaded server, so it can't
> respond to your request until it finishes what it's doing -- sending
> your request. Which obviously doesn't work too well.  :-)

WEBrick is not a single-threaded server.  It can be configured as a single-threaded server but it is not by default:

require 'webrick'
require 'net/http'

s = WEBrick::HTTPServer.new :Port => 8000

count = 0

s.mount_proc '/count' do |req, res|
  count += 1
  res.body = count.to_s
end

s.mount_proc '/' do |req, res|
  Net::HTTP.start 'localhost', 8000 do |http|
    res.body = http.get('/count').body
  end
end

trap 'INT' do s.shutdown end
trap 'TERM' do s.shutdown end

s.start