Caching - Last-Modified Dates
Caching - Last-Modified Dates
- HTTP/1.0 has only Last-Modified: Dates
- Unreliable under some circumstances: resolution left to 1 second
- Notorious problems serving NFS files
- Hard for some servers to generate (e.g. databases)
- Used with
- If-Modified-Since:
- If-Unmodified-Since: