endpoint.rb

require 'sinatra'
require 'json'

post '/endpoint' do
  puts JSON.parse(request['json'])
end

endpoint_results.log

== Sinatra/1.4.5 has taken the stage on 4567 for development with backup from Thin
Thin web server (v1.6.2 codename Doc Brown)
Maximum connections set to 1024
Listening on localhost:4567, CTRL+C to stop
{}
127.0.0.1 - - [03/Jun/2014 10:46:05] "POST /endpoint HTTP/1.1" 200 - 0.0056
{"1"=>10, "2"=>10, "3"=>10, "4"=>10, "5"=>10, "6"=>10, "7"=>10, "8"=>10, "9"=>10, "10"=>10}
127.0.0.1 - - [03/Jun/2014 10:46:35] "POST /endpoint HTTP/1.1" 200 - 0.0010
{}
127.0.0.1 - - [03/Jun/2014 10:47:05] "POST /endpoint HTTP/1.1" 200 - 0.0009
{}
127.0.0.1 - - [03/Jun/2014 10:47:35] "POST /endpoint HTTP/1.1" 200 - 0.0010
{}
127.0.0.1 - - [03/Jun/2014 10:48:05] "POST /endpoint HTTP/1.1" 200 - 0.0006
{}
127.0.0.1 - - [03/Jun/2014 10:48:35] "POST /endpoint HTTP/1.1" 200 - 0.0005
{}
127.0.0.1 - - [03/Jun/2014 10:49:05] "POST /endpoint HTTP/1.1" 200 - 0.0007

pixel-ping.log

--- flushed ---
--- flushed ---
10:	1
10:	2
10:	3
10:	4
10:	5
10:	6
10:	7
10:	8
10:	9
10:	10
--- flushed ---
--- flushed ---
--- flushed ---
--- flushed ---
--- flushed ---
--- flushed ---

requester.rb

require 'net/http'

def make_requests(keys, count)
  # Each key gets its own thread
  threads = keys.map do |key|
    # each key also gets it's own count
    key_count = 0
    Thread.new do
      # Each key requests the number of requests specified by the count.
      Net::HTTP.start('localhost', '5999') do |requester|
        until key_count >= count
          sleep(rand(3))
          puts "Requesting #{key}"
          requester.get("/pixel.gif?key=#{key}")
          key_count += 1
        end
      end
    end
  end
  threads.each{ |t| t.join }
end

make_requests(1..10, 10)

test_config.json

{
  "port":     "5999",
  "host":     "localhost",
  "interval": 30,
  "endpoint": "http://localhost:4567/endpoint"
}