本文介绍了ETag的语法?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

报告我的网页标题无效:

Redbot reports that my webpage has invalid header:

我的标题设置为:

ETag: 4ae413bd

为什么它无效?

ETag的语法是什么?

What is the syntax for an ETag?

推荐答案

尝试 ETag:4ae413bd
ETag的价值必须遵循表格:

  entity-tag = [ weak ] opaque-tag
  weak       = "W/"
  opaque-tag = quoted-string

  quoted-string  = ( <"> *(qdtext | quoted-pair ) <"> )
  qdtext         = <any TEXT except <">>
  quoted-pair    = "\" CHAR
  CHAR           = <any US-ASCII character (octets 0 - 127)>
  TEXT           = <any OCTET except CTLs, but including LWS>
  OCTET          = <any 8-bit sequence of data>
  LWS            = [CRLF] 1*( SP | HT )
  CTL            = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
  CRLF           = CR LF
  CR             = <US-ASCII CR, carriage return (13)>
  LF             = <US-ASCII LF, linefeed (10)>
  SP             = <US-ASCII SP, space (32)>
  HT             = <US-ASCII HT, horizontal-tab (9)>

,基本上是([wW] /)?([^ 常规正则表达式中的] | \\)*

, which is basically ([wW]/)?"([^"]|\\")*" in regular regex.

请注意,两者都是\/是etags的有效值。

Note that both "\" and "/" are valid values for etags.

参考文献:,,。

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09-22 14:46