Found at http://www.juretta.com/log/2006/08/13/ruby_net_http_and_open-uri/


require 'net/https'
require "rexml/document"

username = "" # your del.icio.us username
password = "" # your del.icio.us password

resp = href = "";
begin      
  http = Net::HTTP.new("api.del.icio.us", 443)
  http.use_ssl = true
  http.start do |http|
    req = Net::HTTP::Get.new("/v1/tags/get", {"User-Agent" => 
        "juretta.com RubyLicious 0.2"})
    req.basic_auth(username, password)
    response = http.request(req)
    resp = response.body
  end     
  #  XML Document
  doc = REXML::Document.new(resp)    
  # iterate over each element 
  
  doc.root.elements.each do |elem|
    print elem.attributes['tag']  + " -> " + elem.attributes['count'] + "\n"
  end
  
rescue SocketError
  raise "Host " + host + " nicht erreichbar"
rescue REXML::ParseException => e
  print "error parsing XML " + e.to_s
end