Making Ruby Net::HTTP::Get request with cookie - ruby-on-rails

Question

I'd like to open my stackoverflow.com page via ruby.
And I'd like to see it as if I am authenticated.
I took usr cookie from Google Chrome and created the following snippet:
require 'net/http'
require 'cgi'
url = "http://stackoverflow.com/users/1650525/alex-smolov"
uri = URI(url)
http = Net::HTTP.new(uri.host, 80)
request = Net::HTTP::Get.new(uri.request_uri)
cookie = CGI::Cookie.new("usr", "[my cookie is here]")
request['Cookie'] = cookie
r = http.request(request)
puts r.body
It does output a page, but I'm not authenticated there.
Is it possible to make a Net::HTTP::Get request in Ruby with cookie?

Answer 1

You need to call CGI::Cookie.to_s method.
request['Cookie'] = cookie.to_s
Try following code with / without .to_s.
require 'net/http'
require 'cgi'
uri = URI("http://httpbin.org/cookies")
http = Net::HTTP.new(uri.host, 80)
request = Net::HTTP::Get.new(uri.request_uri)
cookie1 = CGI::Cookie.new('usr', 'blah')
request['Cookie'] = cookie1.to_s # <---
r = http.request(request)
puts r.body
UPDATE
As the other answer mentioned, the resulted string is for server output. You need to strip out ; path= part.
CGI::Cookie.new('usr', 'value').to_s.sub(/; path=$/, '')

Answer 2

The accepted answer is imho incorrect. CGI::Cookie#to_s generates
string which should SERVER send to client, not something Net::HTTP should
use. It can be easily demonstrated:
[1] pry(main)> require 'cgi'
=> true
[2] pry(main)> CGI::Cookie.new('usr', 'value').to_s
=> "usr=value; path="
Code like this should work better.
require 'net/http'
require 'cgi'
uri = URI("http://httpbin.org/cookies")
http = Net::HTTP.new(uri.host, uri.port)
request = Net::HTTP::Get.new(uri.request_uri)
request['Cookie'] = "usr=#{CGI.encode cookie_value}"
r = http.request(request)
puts r.body
Or in case you have multiple cookies in a hash:
h = {'cookie1' => 'val1', 'cookie2' => 'val2'}
req['Cookie'] = h.map { |k,v| "#{k}=#{CGI.encode v}" } .join('; ')