浏览器的Accept-Language的q代表什么？

[zeyexe]

像这样 'Accept-Language': 'zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3'，这个q代表什么？权重吗？

[xuc]

Google就知道了啊

HTTP/1.1 Specification, §14.4:

Each language-range MAY be given an associated quality value which represents an estimate of the user's preference for the languages specified by that range. The quality value defaults to "q=1". For example,
Accept-Language: da, en-gb;q=0.8, en;q=0.7
would mean: "I prefer Danish, but will accept British English and other types of English."