gistfile1.rb

require "rubygems"
require "typhoeus"
require "awesome_print"

def run(follow)
  request = Typhoeus::Request.new("http://www.google.com", :method => :get)
  request.follow_location = follow

  hydra = Typhoeus::Hydra.new
  hydra.queue(request)
  hydra.run

  response = request.response
  ap "follow location: #{follow}"
  ap response.headers_hash
end

##################
ap "AFTER b8840c5"

run(false)
run(true)

###################
ap "BEFORE b8840c5"

module Typhoeus
  class Response
    def headers_hash
      headers.split("\n").map {|o| o.strip}.inject({}) do |hash, o|
        if o.empty?
          hash
        else
          o = o.split(":")
          hash[o.first.strip] = o.last ? o.last.strip : nil
          hash
        end
      end
    end
  end
end

run(false)
run(true)

gistfile2.txt

$ ruby typhoeus_headers.rb 
"AFTER b8840c5"
"follow location: false"
{
            "Location" => "http://www.google.com.br/",
       "Cache-Control" => "private",
        "Content-Type" => "text/html; charset=UTF-8",
          "Set-Cookie" => "PREF=ID=e67e601bcb3fc662:FF=0:TM=1309365035:LM=1309365035:S=d90nwXjW6KthL-wJ; expires=Fri, 28-Jun-2013 16:30:35 GMT; path=/; domain=.google.com",
                "Date" => "Wed, 29 Jun 2011 16:30:35 GMT",
              "Server" => "gws",
      "Content-Length" => "222",
    "X-Xss-Protection" => "1; mode=block"
}
"follow location: true"
{
             "Location" => "http://www.google.com.br/",
        "Cache-Control" => [
        [0] "private",
        [1] "private, max-age=0"
    ],
         "Content-Type" => [
        [0] "text/html; charset=UTF-8",
        [1] "text/html; charset=ISO-8859-1"
    ],
           "Set-Cookie" => [
        [0] "PREF=ID=2c66cb3d0cf225ea:FF=0:TM=1309365037:LM=1309365037:S=99q4Av29cJo5uetM; expires=Fri, 28-Jun-2013 16:30:37 GMT; path=/; domain=.google.com",
        [1] "NID=48=KFHHKThDn2qEPOIgsTQANfAQi14af565bAZn0JVK3YgVWHQDNKoJjAjWX9EkrscTSuUrXgbycJ3JuF_HCnyqWkdWmumXkXHYfNSPuYZhfq9FdZ79ZH7ZEDbwKvkVHaA_; expires=Thu, 29-Dec-2011 16:30:37 GMT; path=/; domain=.google.com; HttpOnly",
        [2] "PREF=ID=1725c9fb5ecbc8d5:FF=0:TM=1309365038:LM=1309365038:S=lM_sXhUl5r1K561i; expires=Fri, 28-Jun-2013 16:30:38 GMT; path=/; domain=.google.com.br",
        [3] "NID=48=Br0VibZQhHJoQc5Znkg8Ew-UvBRUeyhKENHPUn7T5gYQ6-NWwJ7437FoqzkSCf9G2JeBpshEHFAVxBFqg_PGOorp3dmoox_CpakVnN8y5qOzYxxQ_azkROe9RZHlVWNA; expires=Thu, 29-Dec-2011 16:30:38 GMT; path=/; domain=.google.com.br; HttpOnly"
    ],
                 "Date" => [
        [0] "Wed, 29 Jun 2011 16:30:37 GMT",
        [1] "Wed, 29 Jun 2011 16:30:38 GMT"
    ],
               "Server" => [
        [0] "gws",
        [1] "gws"
    ],
       "Content-Length" => "222",
     "X-Xss-Protection" => [
        [0] "1; mode=block",
        [1] "1; mode=block"
    ],
              "Expires" => "-1",
    "Transfer-Encoding" => "chunked"
}
"BEFORE b8840c5"
"follow location: false"
{
    "HTTP/1.1 302 Found" => "HTTP/1.1 302 Found",
              "Location" => "//www.google.com.br/",
         "Cache-Control" => "private",
          "Content-Type" => "text/html; charset=UTF-8",
            "Set-Cookie" => "44 GMT; path=/; domain=.google.com",
                  "Date" => "44 GMT",
                "Server" => "gws",
        "Content-Length" => "222",
      "X-XSS-Protection" => "1; mode=block"
}
"follow location: true"
{
    "HTTP/1.1 302 Found" => "HTTP/1.1 302 Found",
              "Location" => "//www.google.com.br/",
         "Cache-Control" => "private, max-age=0",
          "Content-Type" => "text/html; charset=ISO-8859-1",
            "Set-Cookie" => "00 GMT; path=/; domain=.google.com.br; HttpOnly",
                  "Date" => "00 GMT",
                "Server" => "gws",
        "Content-Length" => "222",
      "X-XSS-Protection" => "1; mode=block",
       "HTTP/1.1 200 OK" => "HTTP/1.1 200 OK",
               "Expires" => "-1",
     "Transfer-Encoding" => "chunked"
}