This is a tiny ruby web server.

rubyWebServer.rb

require 'socket'

webserver = TCPServer.new('127.0.0.1', 7777)

puts "Iniciando servidor."

while (session = webserver.accept)
   session.print "HTTP/1.1 200/OK\r\nContent-type:text/html\r\n\r\n"

   begin
      request = session.gets
   rescue Errno::ECONNRESET
      session = webserver.accept
   end

   trimmedrequest = request.gsub(/GET\ \//, '').gsub(/\ HTTP.*/, '')

   filename = trimmedrequest.chomp

   if filename == ""
      filename = "index.html"
   end

   begin
      displayfile = File.open(filename, 'r')
      content = displayfile.read()
      session.print content
   rescue Errno::ENOENT
      session.print "File not found"
   end

   session.close
end