HTTP/1.1:修订间差异
第43行: | 第43行: | ||
start-line = request-line / status-line | start-line = request-line / status-line | ||
request-line = method SP request-target SP HTTP-version CRLF | request-line = method SP request-target SP HTTP-version CRLF | ||
status-line = HTTP-version SP status-code SP reason-phrase CRLF | |||
</syntaxhighlight> | </syntaxhighlight> | ||
2021年7月17日 (六) 09:16的版本
Http1.1最初定义在Hypertext Transfer Protocol -- HTTP/1.1中,后面被Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing废除,因此当前HTTP1.1协议实际上包括:
- RFC7230:Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing
- RFC7231:Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
- RFC7232:Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests
- RFC7233:Hypertext Transfer Protocol (HTTP/1.1): Range Requests
- RFC7234:Hypertext Transfer Protocol (HTTP/1.1): Caching
- RFC7235:Hypertext Transfer Protocol (HTTP/1.1): Authentication
概要
GET /hello.txt HTTP/1.1 User-Agent: curl/7.16.3 libcurl/7.16.3 OpenSSL/0.9.7l zlib/1.2.3 Host: www.example.com Accept-Language: en, mi
HTTP/1.1 200 OK Date: Mon, 27 Jul 2009 12:28:53 GMT Server: Apache Last-Modified: Wed, 22 Jul 2009 19:15:56 GMT ETag: "34aa387-d-1568eb00" Accept-Ranges: bytes Content-Length: 51 Vary: Accept-Encoding Content-Type: text/plain Hello World! My payload includes a trailing CRLF.
HTTP消息格式
HTTP-message = start-line
*( header-field CRLF )
CRLF
[ message-body ]
程序首先读取start-line以及header,然后根据header里面的内容决定是否含有body。body则按照长度读取定长字节。
start-line = request-line / status-line
request-line = method SP request-target SP HTTP-version CRLF
status-line = HTTP-version SP status-code SP reason-phrase CRLF
其中:
- HTTP中并未直接定义request-line的长度限制,倘若超过服务端实现所支持的长度,则建议返回501(Not implemented)
- HTTP建议request-line支持至少8000字符长
- 若request-target超过服务器预期则必须返回414 (URI Too Long)