Parse XML stream from TCP socket - ruby-on-rails-3

Question

I wrote a Ruby script to connect to an XML stream over a TCP socket. I want to parse this XML stream using LibXML). My problem is that I can't figure out how to pass this stream to LibXML. From the LibXML documentation XML::Document.io(io) this seems to be setup for HTTP, not a TCP socket. Any help on how to wrap my TCP socket so it can be used by LibXML? Or is there a better way to do parse this XML stream from my TCP socket? I'm learning Ruby now, so the code below isn't pretty in the way I authenticated either. Based on other questions on stackoverflow, it seems I will have to ensure that I have complete XML (proper closing tags) before sending that to the LibXML parser. Thanks in advance.
Here's what I have so far:
require 'socket'
require 'timeout'
username = "username\r\n"
password = "password\r\n"
port = 4500
server = 'xmlfeed.website.com'
tcp_client = TCPSocket.new(server, port)
all_data = []
value = 0
while true
partial_data = tcp_client.recv(1012)
if partial_data.length == 0
break
end
all_data << partial_data
puts(all_data)
if value == 0
tcp_client.puts(username)
value = 1
end
if value == 1
tcp_client.puts(password)
value = 2
end
if all_data.to_s.chomp.casecmp( "Starting Feed")
value = 3
puts "Begin the feed"
end
if value == 3
# Parse the data using LibXML
# this is the part I'm not sure how to approach
puts(all_data)
end
end
tcp_client.close
puts all_data.join()