需求：由于運營商緩存社搅，需要域名后加上時間以便繞過緩存喳篇，例：
www.name.com/yyyy-mm-dd/和www.name.com返回同樣的數(shù)據(jù)服赎，這時候就需要nginx的正則匹配
寫法
location ~ ^/\d+\-\d+\-\d+/(.*)$ {
alias /etc/nginx/html/$1;
}
- 重點是
（）和$1,如果不寫榜跌，會報404/403 - nginx文檔：
If alias is used inside a location defined with a regular expression then such regular expression should contain captures and alias should refer to these captures (0.7.40), for example:
location ~ ^/users/(.+\.(?:gif|jpe?g|png))$ {
alias /data/w3/images/$1;
}
