接受任何字符集但對某些型別有偏好

請求：“ http://example.com ”

GET / HTTP/1.1
Host: example.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0
Accept: text/html,application/xml;q=0.9,*/*;q=0.8
Accept-Charset: UTF-8, iso-8859-1;q=0.8, *;q=0.5
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive

如果 UTF-8 不可用，客戶端將接受任何字符集，但更喜歡 UTF-8，然後是 iso-8859-1。