code: def parse_requestline(s):
      
      methods = '|'.join(HttpBaseClass.METHODS)
      m = re.match(r'(' + methods + ')\s+(.*)\s+HTTP/(1.[0|1])', s, re.I)
      if m:
          return m.group(1).upper(), m.group(2), m.group(3)
      else:
          raise ValueError('Not a Request-Line')
docs: http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5
  
      >>> parse_requestline('GET / HTTP/1.0')
      ('GET', '/', '1.0')
      >>> parse_requestline('post /testurl htTP/1.1')
      ('POST', '/testurl', '1.1')
      >>> parse_requestline('Im not a RequestLine')
      Traceback (most recent call last):
          ...
      ValueError: Not a Request-Line