multithreading - Start and call Ruby HTTP server in the same script -

i wonder how start ruby rack application (such sinatra) , call net::http or similar in same script. of couse like...

require 'sinatra/base' require 'net/http'  t = thread.new     class app < sinatra::base         '/'             'hi!'         end     end      app.run! :host => 'localhost', :port => 1234 end  sleep 2  puts net::http.start('localhost', 1234) { |http| http.get('/') }.body  t.join  puts 'bye!' 

...but doesn't feel optimal sleep 2 seconds, waiting thin start. need kind of callback when server has started or have other suggestions?

if @ run! method in sinatra source in base.rb see this:

def run!(options={})   ...   handler.run self, :host => bind, :port => port |server|     [:int, :term].each { |sig| trap(sig) { quit!(server, handler_name) } }     set :running, true   end   ... end 

there no way attach callbacks around here. but! see :running setting changed once server up.

so, simple solution seems to have thread watch app.settings.running in small polling loop (every 500ms or along lines). once running true can safely stuff.

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edit: improved version, bit of monkey patching goodness.
adding after_running callback sinatra:

class sinatra::base   # redefine 'running' setting support threaded callback   def self.running=(isup)     metadef(:running, &proc.new{isup})      return if !defined?(after_running)     return if !isup      thread.new       thread.pass       after_running     end   end end  class app < sinatra::base    set :after_running, lambda {     puts "we're up!"     puts net::http.start('localhost', 1234) { |http| http.get('/') }.body     puts "done"   }    '/'     'hi!'   end  end  app.run! :host => "localhost", :port => 1234