HTTP协议分析

request-header = Accept ; Section 14.1 | Accept-Charset ; Section 14.2 | Accept-Encoding ; Section 14.3 | Accept-Language ; Section 14.4 | Authorization ; Section 14.8 | Expect ; Section 14.20 | From ; Section 14.22 | Host ; Section 14.23 | If-Match ; Section 14.24 

 | If-Modified-Since ; Section 14.25 | If-None-Match ; Section 14.26 | If-Range ; Section 14.27 | If-Unmodified-Since ; Section 14.28 | Max-Forwards ; Section 14.31 | Proxy-Authorization ; Section 14.34 | Range ; Section 14.35 | Referer ; Section 14.36 | TE ; Section 14.39 | User-Agent ; Section 14.43 
request的请求头内容。
Accept-Charset: iso-8859-5, unicode-1-1;q=0.8
Accept-Encoding: compress, gzip
 Accept-Encoding:
 Accept-Encoding: *
 Accept-Encoding: compress;q=0.5, gzip;q=1.0

Accept-Encoding: gzip;q=1.0, identity; q=0.5, *;q=0
 Accept-Language: da, en-gb;q=0.8, en;q=0.7
Accept-Ranges: none
Allow: GET, HEAD, PUT