HTTP协议分析

1.

request-header = Accept                   ; Section 14.1
                      | Accept-Charset           ; Section 
                      | Accept-Encoding          ; Section 
                      | Accept-Language          ; Section 
                      | Authorization            ; Section 
                      | Expect                   ; Section 
                      | From                     ; Section 
                      | Host                     ; Section 
                      | If-Match                 ; Section 

                      | If-Modified-Since        ; Section 14.25
                      | If-None-Match            ; Section 
                      | If-Range                 ; Section 
                      | If-Unmodified-Since      ; Section 
                      | Max-Forwards             ; Section 
                      | Proxy-Authorization      ; Section 
                      | Range                    ; Section 
                      | Referer                  ; Section 
                      | TE                       ; Section 
                      | User-Agent               ; Section 

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