require 'net/http'

uri = URI('http://www.example.com/search.cgi')
res = Net::HTTP.post_form(uri, 'q' => ['ruby', 'perl'], 'max' => '50')
puts res.body

gem "http"

require 'http'
response = HTTP.post("https://api.test/post", :params => {:id => 5})
response.body # retorna um objeto representando a resposta
response.code # retorna o código HTTP da resposta, e.g. 404, 500, 200

HTTP.basic_auth(:user => "user", :pass => "pass")
  .get("https://example.com")

HTTP.auth("Bearer VGhlIEhUVFAgR2VtLCBST0NLUw")
  .get("https://example.com")