em-http-retry.rb

require 'em-http'

EM.run do

  def dispatch(opts)
    opts
    puts opts
    h = EM::HttpRequest.new(opts[:uri]).get
    
    h.callback { |rep| opts[:cb].call(rep) if opts[:cb] }
    h.errback do |rep|

      #how do i write this code in errback if I am passing my own errback handling code from the initial dispatch
      opts[:retries] < 3 ? dispatch(opts.merge({:retries =>(opts[:retries] +1)})) : opts[:eb].call(rep)

    end
  end
  cb = Proc.new{ |rep| [:success, rep.response]; EM.stop }
  eb = Proc.new{ |rep| puts "original errback" ; EM.stop}
  dispatch(:uri => 'http://badhos1212.com/',:cb => cb,:eb => eb,:retries => 0)
end

simple example

require 'em-http'

EM.run do

  def dispatch(uri, retries = 0)
    h = EM::HttpRequest.new(uri).get

    h.callback { |rep| [:success, rep.response]; EM.stop }
    h.errback do |rep|
      p [:fail, rep]

      retries < 3 ? dispatch(uri, retries+1) : EM.stop

    end
  end

  dispatch('http://badhos1212.com/')
end

simpleexample

require 'em-http'

EM.run do

  def dispatch(uri, retries = 0)
    h = EM::HttpRequest.new(uri).get

    h.callback { |rep| [:success, rep.response]; EM.stop }
    h.errback do |rep|
      p [:fail, rep]

      retries < 3 ? dispatch(uri, retries+1) : EM.stop

    end
  end

  dispatch('http://badhos1212.com/')
end