I’m using this to get login information from mod_ldap_auth – user is authenticated against Microsoft’s Active Directory (AD)

def getAuthenticated
  if request.env['HTTP_AUTHORIZATION'] then
    authdata = request.env['HTTP_AUTHORIZATION'].to_s.split
    user,pass = Base64.decode64(authdata[1]).split(':')[0..1]
    [ user, pass ]
  else
    [ "", "" ]
  end
end

def search
  require 'soap/wsdlDriver'
  @title = 'Search Results'
  key = 'YOUR GOOGLE API KEY HERE'
  yoursite = 'YOUR SITE ADDRESS HERE'
  driver = SOAP::WSDLDriverFactory.new("http://api.google.com/GoogleSearch.wsdl").createDriver
  @results = driver.doGoogleSearch(key, @params['term']+" site:#{yoursite}", 0, 10, true, " ", false, " ", " ", " ")
end

and parsing data

<% for result in @results.resultElements %>
 <%= result.title %>
 <%= result.snippet %>
 <%= result.URL %>
<% end %>