Re: HTTP reply code 304 and access type TCP_MISS

That the client did a conditional If-Modified-Since get, where the
source wasn't modified.

304 is "Not modified".

TCP_MISS 304 is "Not modified" responce to a cache miss.

TCP_CLIENT_REFRESH is when the user presses Reload (Pragma: no-cache)
TCP_IMS_HIT = If-Modified-Since request served from cache.
TCP_IMS_MISS = If-Modified-Since request where the cached object was out
of date.

---
Henrik Nordström
Carlos Maltzahn wrote:
> 
> What does the combination of HTTP reply code 304 and access log type
> TCP_MISS mean? I found that most of my access log lines which show return
> code 304 are of access type TCP_MISS. 304 also occurs with
> TCP_CLIENT_REFRESH, TCP_IMS_HIT, TCP_IMS_MISS.
> 
> The access log is from Squid 1.1.5.
> 
> Thanks,
> Carlos