HTTP协议小记

整个HTTP消息的组成为

请求行(请求时)/状态行(响应时)

头

实体

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HTTP消息分为请求和响应两种

两者只在头域中的第二部分不同

 

请求的头组成为

通用头,请求头 ,实体头

 

响应的头组成为

通用头,响应头 ,实体头

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实体的长度在头中以Content-Length确定

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通用头类型包括:

general-header = Cache-Control          
                      | Connection            
                      | Date                  
                      | Pragma             
                      | Trailer                
                      | Transfer-Encoding       
                      | Upgrade               
                      | Via                     
                      | Warning                  

请求头类型包括:

request-header = Accept              
                      | Accept-Charset     
                      | Accept-Encoding  
                      | Accept-Language  
                      | Authorization        
                      | Expect                
                      | From                   
                      | Host                   
                      | If-Match                
                      | If-Modified-Since      
                      | If-None-Match           
                      | If-Range                
                      | If-Unmodified-Since    
                      | Max-Forwards            
                      | Proxy-Authorization    
                      | Range                   
                      | Referer                
                      | TE                      
                      | User-Agent              

响应头类型包括:

response-header = Accept-Ranges         
                       | Age                    
                       | ETag                   
                       | Location               
                       | Proxy-Authenticate    
                       | Retry-After           
                       | Server                 
                       | Vary                  
                       | WWW-Authenticate      

实体头类型包括:

entity-header  = Allow                   
                      | Content-Encoding        
                      | Content-Language       
                      | Content-Length          
                      | Content-Location       
                      | Content-MD5            
                      | Content-Range           
                      | Content-Type           
                      | Expires                 
                      | Last-Modified           
                      | extension-header

其中

extension-header = message-header