Python 네트워크 파충류 의-HTTP 프로 토 콜 원리

1.     ：
	1. Ctrl+Shift+I        	
	2. Client  Server   Request(  )-->Response(  )

	1. General(  )
		Request URL: #  url(       )
		Request Method: #    (GET/POST/HEAD/more..)
		Status Code: #     (200 OK/304/more...)
		Remote Address: #  IP
		Referrer Policy: #    
	
	2. Response Headers(    )
		HTTP/1.1 200 OK            
		Server:          
		Date: Sun, 10 Nov 2019 07:31:07 GMT    #     
		Content-Type: text/html; charset=UTF-8   #         
		Transfer-Encoding: chunked       #    
		Connection: keep-alive     #    
		Expires: Thu, 19 Nov 1981 08:52:00 GMT    #      
		Cache-Control: no-store, no-cache, must-revalidate   #    
		Pragma: no-cache   #http/1.1           ，    http        。
		Vary: Cookie   #          ，        
		X-Pingback: wordpress      
		Content-Encoding: gzip   #        

	3. Request Headers(    )
		GET /5465.html HTTP/1.1
		Host:   
		Connection: keep-alive   #    
		Cache-Control: max-age=0  #    
		DNT: 1  #    
		Upgrade-Insecure-Requests: 1
		User-Agent:  #         (   )
		Sec-Fetch-Mode: navigate
		Sec-Fetch-User: ?1
		Accept: #      
		Sec-Fetch-Site: same-origin   #    
		Referer: https://cuiqingcai.com/5052.html    #                   
		Accept-Encoding: gzip, deflate, br    #    
		Accept-Language: zh-CN,zh;q=0.9    #     
		Cookie: cookie   

1.   Cookie          (    )      set-cookie       \
	                            \
	   C/S  Client cookie           cookie。
	
2. **    **
	          ，          “       ，      ”，        。\
	            ，             ，                 。\
	     ，    ，               ，          。\
	  ，                     。
	
	           ，                      ，                     。\
	         ，               Cookie     ID  ，\
	       Cookies    ，        ，            。\
	        Cookies      ，                HTTP   ，    Cookies      ，\
	        ，            ID，             。
	
	                     ，                  ，\
	                         ，\
	                  ，              。