excon.rb

require 'rubygems'
require 'excon'

def download_file(url, source_path = nil)
  error = nil

  if source_path.nil?
    source_path = File.join("/tmp", "output")
  end

  file_handle = File.open(source_path, 'wb')

  streamer = lambda do |chunk, remaining_bytes, total_bytes|
    file_handle.write(chunk)
  end

  puts "about to start connection to '#{url}'"
  connection = Excon.new(url, connect_timeout: 360, debug: true, omit_default_port: true)
  begin
    connection.request(expects: 200,
                       method: :get,
                       idempotent: true,
                       retry_limit: 6,
                       read_timeout: 360,
                       response_block: streamer)
  rescue Excon::Errors::Error => e
    puts e
    file_handle.close
    file_handle = nil
  ensure
    file_handle.close if file_handle
  end

  return source_path, error
end

download_file('http://mclov.in/')