|  |      1fsw90628      2012-04-25 00:50:14 +08:00  3 推荐: https://developers.google.com/speed/docs/best-practices/caching 引用: It is redundant to specify both Expires and Cache-Control: max-age, or to specify both Last-Modified and ETag. | 
|  |      2luser      2012-04-25 01:11:05 +08:00 Expires支持更广泛 印象中cache-control是http1.1新加的 详见rfc2616 |