ruby-get-url-query-params

query params to hash and get params 

require 'uri'
irb(main):009:0* uri = URI("http://foo.com/posts?id=30&limit=5#time=1305298413")
=> #<URI::HTTP:0x007f95c7025e68 URL:http://foo.com/posts?id=30&limit=5#time=1305298413>
irb(main):010:0> uri.host
=> "foo.com"
irb(main):012:0> q = uri.query
=> "id=30&limit=5"
irb(main):015:0> dds = URI.decode_www_form(q)
=> [["id", "30"], ["limit", "5"]]
irb(main):018:0> Hash[dds]
=> {"id"=>"30", "limit"=>"5"}
irb(main):019:0> h = Hash[dds]
=> {"id"=>"30", "limit"=>"5"}
irb(main):020:0> h["id"]
=> "30"