Demonstrate a memory leak in typhoeus. Fixed in http://github.com/gravis/typhoeus/commit/32531d0821aecc42b39774c76c5a6fde46ae868e

config.ru

#! /usr/bin/rackup
#\ -w -p 8765

map '/' do
  run Proc.new {|env| 
  req = Rack::Request.new(env)
  if req.params['PARAM1'] and req.params['PARAM2'] and req.params['PARAM3'] and req.params['PARAM4'] and req.params['PARAM5'] and env['HTTP_HEADER1'] and env['HTTP_HEADER2']
    [200, {"Content-Type" => "text/html"}, ["Data Sent"]]
  else
    puts req.params
    [400, {"Content-Type" => "text/html"}, ["Bad request"]]
  end
  }
end

typhoeus_easy_test.rb

#! /usr/bin/env ruby

require 'rubygems'
require 'typhoeus'

multi = Typhoeus::Multi.new
failures = 0 
2000.times.each do
  req = Typhoeus::Easy.new
  req.url = "http://localhost:8765"
  req.method = :post
  req.headers = {'HEADER1' => '1', 'HEADER2' => '1'}
  req.params = {:PARAM1 => "something to send", :PARAM2 => '1', :PARAM3 => '1', :PARAM4 => '1', :PARAM5 => '1'}
  req.on_failure do |response|
      puts "Error #{response.inspect}"
      failures += 1
  end 
  req.set_headers
  multi.add req 
end

multi.perform
puts "Failed : #{failures}"

# Output :
#
# $ ruby typh.rb
# Error #<Typhoeus::Easy:0x7ffe74dde558>
# Error #<Typhoeus::Easy:0x7ffe74ddd838>
# Error #<Typhoeus::Easy:0x7ffe74ddcaa0>
# [...]
# Error #<Typhoeus::Easy:0x7ffe750d1a08>
# Failed : 1775
# $
#
#
# => More than 75% of the total requests are failing
# => With 1000 requests, ~500 are failing

typhoeus_test.rb

#! /usr/bin/env ruby

require 'rubygems'
require 'typhoeus'

hydra = Typhoeus::Hydra.new(:max_concurrency => 20) 

failures = 0 
2000.times.each do 
  req = Typhoeus::Request.new("http://localhost:8765", :method => :post, :params => {:PARAM1 => "something to send", :PARAM2 => '1', :PARAM3 => '1', :PARAM4 => '1', :PARAM5 => '1'}, :headers => {'HEADER1' => '1', 'HEADER2' => '1'})
  req.on_complete do |response|
    if !response.success?
      puts "Error #{response.body}"
      failures += 1
    end 
  end 
  hydra.queue req 
end

hydra.run
puts "Failed : #{failures}"


# Output :
#
# $ ruby typhoeus_test.rb
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Failed : 11
# $
# $ ruby typhoeus_test.rb 
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Error Bad request
# Failed : 5
# 
# [...]
# (on rack side :)
# 
# [...]
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 200 - 0.0007
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 200 - 0.0007
# PARAM1something to sendPARAM21@???1PARAM51
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 400 - 0.0271
# PARAM1something to sendPARAM21?@?1PARAM51
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 400 - 0.0009
# PARAM1something to sendPARAM21?v?1PARAM51
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 400 - 0.0008
# 0?j91PARAM1something to sendPARAM21PARAM51
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 400 - 0.0008
# 127.0.0.1 - - [03/Jul/2010 17:06:40] "POST / HTTP/1.1" 200 - 0.0008
# [...]