Appendix B. Collected ABNF (汇总的 ABNF)

核心语法规则汇总

本附录汇总了 RFC 7230 中定义的所有 ABNF 语法规则，便于参考。

消息格式

HTTP-message   = start-line
                 *( header-field CRLF )
                 CRLF
                 [ message-body ]

start-line     = request-line / status-line

请求行

request-line   = method SP request-target SP HTTP-version CRLF
method         = token
request-target = origin-form
               / absolute-form
               / authority-form
               / asterisk-form

状态行

status-line    = HTTP-version SP status-code SP reason-phrase CRLF
status-code    = 3DIGIT
reason-phrase  = *( HTAB / SP / VCHAR / obs-text )

头部字段

header-field   = field-name ":" OWS field-value OWS
field-name     = token
field-value    = *( field-content / obs-fold )

传输编码

Transfer-Encoding = 1#transfer-coding
transfer-coding    = "chunked" / transfer-extension

内容长度

Content-Length = 1*DIGIT

连接

Connection        = 1#connection-option
connection-option = token

Host

Host = uri-host [ ":" port ]

完整语法: 请参考 RFC 7230 原文获取所有详细的 ABNF 规则定义。

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✅ Appendix B 完成