风帆不缓存压缩文件

Question

知道为什么Chrome没有从Sails或Express缓存gzip文件？

未缓存的文件：js，css

缓存的文件：png，woff

javascript的响应标头

HTTP/1.1 200 OK
Access-Control-Allow-Origin: 
Access-Control-Allow-Credentials: 
Access-Control-Allow-Methods: 
Access-Control-Allow-Headers: 
Accept-Ranges: bytes
Date: Thu, 29 Oct 2015 17:37:01 GMT
Cache-Control: public, max-age=31536000
Last-Modified: Thu, 29 Oct 2015 17:10:18 GMT
ETag: W/"fKReHkHilgulZYl81EvdUg=="
Content-Type: application/javascript
Vary: Accept-Encoding
Content-Encoding: gzip
Connection: keep-alive
Transfer-Encoding: chunked

图片的响应标头

HTTP/1.1 200 OK
Access-Control-Allow-Origin: 
Access-Control-Allow-Credentials: 
Access-Control-Allow-Methods: 
Access-Control-Allow-Headers: 
Accept-Ranges: bytes
Date: Thu, 29 Oct 2015 17:37:02 GMT
Cache-Control: public, max-age=31536000
Last-Modified: Thu, 29 Oct 2015 17:10:18 GMT
ETag: W/"d+496iEH7ze9Df3G7Jytiw=="
Content-Type: image/png
Content-Length: 4121
Connection: keep-alive