HA
     DIGIT          = <any US-ASCII digit "0".."9">
     CTL            = <any US-ASCII control character
                      (octets 0 - 31) and DEL (127)>
     CR             = <US-ASCII CR, carriage return (13)>
     LF             = <US-ASCII LF, linefeed (10)>
     SP             = <US-ASCII SP, space (32)>
     HT             = <US-ASCII HT, horizontal-tab (9)>
     <">            = <US-ASCII double-quote mark (34)>
 </pre>
 <p>
  Many HTTP/1.1 header field values consist of words separated by LW