> curl -s -D - http://my_cdn/assets/application.js.gz -o /dev/null
HTTP/1.1 200 OK
Content-Type: text/javascript
Content-Length: 96863
Connection: keep-alive
Date: Thu, 30 Oct 2014 16:16:30 GMT
Content-Encoding: gzip
Last-Modified: Thu, 30 Oct 2014 14:35:57 GMT
ETag: "441bfe2dbf1c4809dc95827be61d0864"
Accept-Ranges: bytes
Server: AmazonS3
X-Cache: Miss from cloudfront
Via: 1.1 75a8e23cb7945fb2a66fc1718efd6958.cloudfront.net (CloudFront)
X-Amz-Cf-Id: KEGFzP0OGnvFGQuqxU42llZsgRJAVoR2hM0cb47tJSusJU1tRhy80w==

# Request headers
GET /assets/application.js HTTP/1.1
Host: my_cdn
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Referer: http://my_website/
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache


# Response headers
HTTP/1.1 200 OK
Content-Type: text/javascript
Content-Length: 340447
Connection: keep-alive
Date: Thu, 30 Oct 2014 14:37:57 GMT
Cache-Control: public, max-age=31557600
Expires: Fri, 30 Oct 2015 20:40:45 GMT
Last-Modified: Thu, 30 Oct 2014 14:35:57 GMT
Etag: "873d5aa220bd2f96ad4473ddd02567b5"
Accept-Ranges: bytes
Server: AmazonS3
Age: 6494
X-Cache: Hit from cloudfront
Via: 1.1 xxx.cloudfront.net (CloudFront)
X-Amz-Cf-Id: CIwvuB08iAt2rwbfuYxWkl_R5HMgI98tdQIoHgUNGhJDdB9KdjRO7g==