ruby URI类

require 'uri'
uri = URI('http://foo.com/posts?id=30&limit=5#time=1305298413')
#=> #<URI::HTTP:0x00000000b14880 URL:http://foo.com/posts?id=30&limit=5#time=1305298413>
uri.scheme
#=> "http"
uri.host
#=> "foo.com"
uri.path
#=> "/posts"
uri.query
#=> "id=30&limit=5"
uri.fragment
#=> "time=1305298413"
uri.to_s
#=> "http://foo.com/posts?id=30&limit=5#time=1305298413"