agent.rb

USER_AGENT_ALIASES = ['Windows Mozilla', 'Mac Safari', 'Mac FireFox', 'Mac Mozilla', 'Linux Mozilla', 'Linux Firefox']
agent = Mechanize.new do |mech|
  mech.open_timeout = 10
  mech.read_timeout = 10
  mech.follow_meta_refresh = true
  mech.keep_alive = true
  mech.max_history = 1
  mech.user_agent_alias = USER_AGENT_ALIASES.sample
end
agent.set_proxy(proxy_ip, proxy_port, AppConfig.http_proxy.username, AppConfig.http_proxy.password)
agent.get(url)