“I keep getting these notifications that you've updated your site,” said Dad, “but when I check, I keep seeing the same page over and over again.” This was about the fourth or fifth time this topic has come up over the past few months. And each time I tell Dad to shift-reload [1] but that doesn't seem to work for him, although the page eventually does change, after awhile.
Sigh.
I suspect I know the problem. Sometime in the past year I changed the configuration of my webserver to allow browsers and web proxies to better cache the content here:
>
```
ExpiresActive On
ExpiresDefault "access plus 1 day"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType text/css "access plus 1 month"
ExpiresByType text/plain "access plus 1 month"
```
Images, style sheets, plain text files, all can be cached for a month (heck, they can probably be cached indefinitely for my blog—the content has never really changed all that much), but the web pages (in addition to the various feed [2] files [3]) can only be cahced for 24 hours.
And I think that's the issue.
Dad's ISP (Internet Service Provider) is known to aggressively cache the web [4] (I won't name names, but it's initials are 'A', 'O' and 'L') so I may need to adjust my methods for caching values.
[1] http://www.hbuhsd.k12.ca.us/Bulletins/Bulletin_1999-08-04.htm
[2] https://boston.conman.org/bostondiaries.rss
[3] https://boston.conman.org/index.atom