Recording the Way

Learning Http

http
2018/01/05

Request

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Request       = Request-Line              
                        *(( general-header        
                         | request-header         
                         | entity-header ) CRLF)  
                        CRLF
                        [ message-body ]

Request-Line

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Request-Line   = Method SP Request-URI SP HTTP-Version CRLF

Method

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Method         = "OPTIONS"                
                      | "GET"             
                      | "HEAD"            
                      | "POST"            
                      | "PUT"             
                      | "DELETE"          
                      | "TRACE"           
                      | "CONNECT"         
                      | extension-method
       extension-method = token

Request-URI

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Request-URI    = "*" | absoluteURI | abs_path | authority

例子：GET http://www.w3.org/pub/WWW/TheProject.html HTTP/1.1

Request Header Fields

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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

Response

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Response      = Status-Line               ;
                       *(( general-header        
                        | response-header        
                        | entity-header ) CRLF)  
                       CRLF
                       [ message-body ]

Status-Line

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Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF

Status Code and Reason Phrase

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- 1xx: Informational - Request received, continuing process
- 2xx: Success - The action was successfully received,
understood, and accepted
- 3xx: Redirection - Further action must be taken in order to
complete the request
- 4xx: Client Error - The request contains bad syntax or cannot
be fulfilled
- 5xx: Server Error - The server failed to fulfill an apparently
valid request
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Status-Code    =
          | "100"  ; Continue
          | "101"  ; Switching Protocols
          | "200"  ; OK
          | "201"  ; Created
          | "202"  ; Accepted
          | "203"  ; Non-Authoritative Information
          | "204"  ; No Content
          | "205"  ; Reset Content
          | "206"  ; Partial Content
          | "300"  ; Multiple Choices
          | "301"  ; Moved Permanently
          | "302"  ; Found
          | "303"  ; See Other
          | "304"  ; Not Modified
          | "305"  ; Use Proxy
          | "307"  ; Temporary Redirect
          | "400"  ; Bad Request
          | "401"  ; Unauthorized
          | "402"  ; Payment Required
          | "403"  ; Forbidden
          | "404"  ; Not Found
          | "405"  ; Method Not Allowed
          | "406"  ; Not Acceptable
          | "407"  ; Proxy Authentication Required
          | "408"  ; Request Time-out
          | "409"  ;: Conflict
          | "410"  ;: Gone
          | "411"  ;: Length Required
          | "412"  ;: Precondition Failed
          | "413"  ;: Request Entity Too Large
          | "414"  ;: Request-URI Too Large
          | "415"  ;: Unsupported Media Type
          | "416"  ;: Requested range not satisfiable
          | "417"  ;: Expectation Failed
          | "500"  ; Internal Server Error
          | "501"  ; Not Implemented
          | "502"  ; Bad Gateway
          | "503"  ; Service Unavailable
          | "504"  ; Gateway Time-out
          | "505"  ; HTTP Version not supported
          | extension-code

Response Header Fields

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response-header = Accept-Ranges           
                       | Age              
                       | ETag             
                       | Location         
                       | Proxy-Authenticate
                       | Retry-After      
                       | Server           
                       | Vary             
                       | WWW-Authenticate
CATALOG
  1. 1. Request
    1. 1.0.1. Request-Line
    2. 1.0.2. Method
    3. 1.0.3. Request-URI
    4. 1.0.4. Request Header Fields
  • 2. Response
    1. 2.0.1. Status-Line
    2. 2.0.2. Status Code and Reason Phrase
    3. 2.0.3. Response Header Fields
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