The tcp client can not receive data from eventmachine

Question

there is the code, the client:

require 'rubygems'
require 'benchmark'
require 'socket'

i=0
TCPSocket.open "127.0.0.1", 8080 do |s|
  s.send "#{i}th sending", 0        
   if line = s.gets
     puts line
   end
end

the server:

require 'rubygems'
require 'benchmark'
require 'eventmachine'
class Handler  < EventMachine::Connection
  def receive_data(data)
    sleep 2 # simulate a long running request
    send_data "send_response"
    puts data
  end
end

EventMachine::run {
  EventMachine::start_server("0.0.0.0", 8080, Handler)
  puts "Listening..."
}

The client can not print anything

Answer 1

It's an interaction between s.gets in the client and send_data "send_response" in the server.

Your small test works fine for me when I change:

send_data "send_response"

to

send_data "send_response\n"

The s.gets is waiting for a newline from the remote client. None comes.