13. max-age
Client Server
200 OK
Cache-Control →max-age=60
...
[Content data] …10s
…60s
GET
Checking
cache
GET
Checking
cache
200 OK
Cache-Control →max-age=60
...
[Content data]
GET
14. no-cache + ETag
Client Server
GET
200 OK
Cache-Control →no-cache, private
ETag →“123"
...
[Content data]
GET
If-None-Match→ "123"
Checking
cache
304 Not Modified
Cache-Control →no-cache, private
ETag →“123"
...
15. no-cache + Last-Modified
Client Server
GET
200 OK
Cache-Control →no-cache, public
Last-Modified→ Sat, 01 Jan 2000 00:00:00 GMT
...
[Content data]
GET
If-Modified-Since → Sat, 01 Jan 2000 00:00:00 GMT
Checking
cache
304 Not Modified
Cache-Control →no-cache, public
Last-Modified→ Sat, 01 Jan 2000 00:00:00 GMT
...