Loading certificate chain from a CA directory to use for validation to a certain depth.

ruby_cert_chain_request.rb

require 'net/http'
require 'net/https'
require 'uri'

API_URI = 'some.site.com'
root_ca_path = '/etc/ssl/certs'
root_ca_depth = 5
api_user = 'username'
api_password = 'password'

url = URI.parse "https://#{API_URI}"
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = (url.scheme == 'https')

if (File.directory?(root_ca_path) && http.use_ssl?)
  http.ca_path = RootCA
  http.verify_mode = OpenSSL::SSL::VERIFY_PEER
  http.verify_depth = root_ca_depth
else
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE 
end

request = Net::HTTP::Get.new(url.path)
request.basic_auth api_user, api_password
response = http.request(request)