old_contents: import SimpleHTTPServer
  import SocketServer
  
  
  class KcaaHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
  
      def do_HEAD(self):
          # Note: HTTP request handlers are not new-style classes.
          # super() cannot be used.
          SimpleHTTPServer.SimpleHTTPRequestHandler.do_HEAD(self)
  
      def do_GET(self):
          SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)
  
  
  def setup(args):
      httpd = SocketServer.TCPServer(('', args.server_port),
                                     KcaaHTTPRequestHandler)
      _, port = httpd.server_address
      root_url = 'http://127.0.0.1:{}/web/'.format(port)
      print 'KCAA server ready at {}'.format(root_url)
      return httpd, root_url
  
new_contents: import SimpleHTTPServer
  import SocketServer
  
  
  class KcaaHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
  
      CLIENT_PREFIX = '/client/'
  
      def do_HEAD(self):
          # Note: HTTP request handlers are not new-style classes.
          # super() cannot be used.
          if self.rewrite_to_client_path():
              SimpleHTTPServer.SimpleHTTPRequestHandler.do_HEAD(self)
  
      def do_GET(self):
          if self.rewrite_to_client_path():
              SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)
  
      def rewrite_to_client_path(self):
          if self.path.startswith(KcaaHTTPRequestHandler.CLIENT_PREFIX):
              self.path = '/' + self.path[len(
                  KcaaHTTPRequestHandler.CLIENT_PREFIX):]
              return True
          else:
              return False
  
  
  def setup(args):
      httpd = SocketServer.TCPServer(('', args.server_port),
                                     KcaaHTTPRequestHandler)
      _, port = httpd.server_address
      root_url = 'http://127.0.0.1:{}/client/'.format(port)
      print 'KCAA server ready at {}'.format(root_url)
      return httpd, root_url
  
subject: Handle only /client requests to file serving.