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I have my own hobby website
http://fabpedigree.com
Most of the pages change about once per month.
When I access it myself with Firefox I often get old versions.
(I can click Refresh, of course, if I notice this,
but I worry about others accessing the site; they'd have
the same problem but not even know it.)
I realize I can add a 'NO-CACHE' directive on each page,
or in a .htaccess file, but that seems like overkill.
I don't want to degrade access speed. It would be
inconvenient to add EXPIRES directives to the html
pages, as I don't know in advance when the page will
be obsoleted.

I wish there were a .htaccess or html directive like
"Don't keep any cached pages for more than a week."
How do others handle this issue?

My ignorance of html, etc., is rather thorough, so any comments
on elementary ideas I'm overlooking are welcome.

James Dow Allen

"James Dow Allen" <> wrote in message news:13c137d4-5541-4362-8eaa-...
> I have my own hobby website
> http://fabpedigree.com
> Most of the pages change about once per month.
> When I access it myself with Firefox I often get old versions.
> (I can click Refresh, of course, if I notice this,
> but I worry about others accessing the site; they'd have
> the same problem but not even know it.)
> I realize I can add a 'NO-CACHE' directive on each page,
> or in a .htaccess file, but that seems like overkill.
> I don't want to degrade access speed. It would be
> inconvenient to add EXPIRES directives to the html
> pages, as I don't know in advance when the page will
> be obsoleted.
>
> I wish there were a .htaccess or html directive like
> "Don't keep any cached pages for more than a week."
> How do others handle this issue?
>
> My ignorance of html, etc., is rather thorough, so any comments
> on elementary ideas I'm overlooking are welcome.
>
> James Dow Allen

Pass on:: IE8SP2
Pass on:: Sarfari 5.1.6
Pass on:: Opera/9.80
Pass on:: FireFox 10.2
pass on:: Mozilla 1.7.2

2012-10-08 10:02, James Dow Allen wrote:

> I have my own hobby website
> http://fabpedigree.com
> Most of the pages change about once per month.

Check out
http://redbot.org/?uri=http%3A%2F%2Ffabpedigree.com
for a quick cacheability analysis. Browsers will make their own
analysis, mainly based on the Last-Modified header.

> When I access it myself with Firefox I often get old versions.

This is a common fallacy among authors. At present, when Last-Modified
means that the page was modified a few days ago, browsers probably treat
it as cacheable for some minutes, or maybe a few hours. Now, as an
author, you may have opened the page in a browser, perhaps closed the
browser, edited the page, and then open it again. The browser will use
the cached copy, for apparent reasons. What are the odds that this
happens to a casual surfer?

> It would be
> inconvenient to add EXPIRES directives to the html
> pages, as I don't know in advance when the page will
> be obsoleted.

EXPIRES means that the cached copy will be treated as stale. This is
something you do on the basis of estimates and guesses, not exact
computation of the future.

> I wish there were a .htaccess or html directive like
> "Don't keep any cached pages for more than a week."

There are no directives in HTML.

But there is such a directive in Apache, see
http://httpd.apache.org/docs/2.2/mod/mod_expires.html
By setting
ExpiresByType text/html "access plus 7 days"
you are effectively imposing an upper limit on the lifetime of a cached
copy of any HTML document.

--
Yucca, http://www.cs.tut.fi/~jkorpela/

"Jukka K. Korpela" <> wrote in message news:k4u4ll$ec8$...
> 2012-10-08 10:02, James Dow Allen wrote:
>
>> I have my own hobby website
>> http://fabpedigree.com
>> Most of the pages change about once per month.
>
> Check out
> http://redbot.org/?uri=http%3A%2F%2Ffabpedigree.com
> for a quick cacheability analysis. Browsers will make their own
> analysis, mainly based on the Last-Modified header.
>
> > When I access it myself with Firefox I often get old versions.
>
> This is a common fallacy among authors. At present, when Last-Modified
> means that the page was modified a few days ago, browsers probably treat
> it as cacheable for some minutes, or maybe a few hours. Now, as an
> author, you may have opened the page in a browser, perhaps closed the
> browser, edited the page, and then open it again. The browser will use
> the cached copy, for apparent reasons. What are the odds that this
> happens to a casual surfer?
>
>> It would be
>> inconvenient to add EXPIRES directives to the html
>> pages, as I don't know in advance when the page will
>> be obsoleted.
>
> EXPIRES means that the cached copy will be treated as stale. This is
> something you do on the basis of estimates and guesses, not exact
> computation of the future.
>
>> I wish there were a .htaccess or html directive like
>> "Don't keep any cached pages for more than a week."
>
> There are no directives in HTML.
>
> But there is such a directive in Apache, see
> http://httpd.apache.org/docs/2.2/mod/mod_expires.html
> By setting
> ExpiresByType text/html "access plus 7 days"
> you are effectively imposing an upper limit on the lifetime of a cached
> copy of any HTML document.
>

Good answer with good Info..........


--
http://mynews.ath.cx/thread.php?grou...pport.helpdesk

On Oct 8, 3:59*pm, "Jukka K. Korpela" <jkorp...@cs.tut.fi> wrote:
> ExpiresByType text/html "access plus 7 days"

Thank you muchly. This is exactly what I was looking for!
(I'm going with "3 days" instead of 7.)

I see lots of Google hits for "ExpiresByType" but no mention
of this option if I Google ".htaccess tutorial" or such.

This is the 2nd or 3rd time I've had quick useful responses
here for my website questions. Maybe I should visit here
more often.

James

"James Dow Allen" <> wrote in message news:4d6b935f-df00-43b5-937b-...
> On Oct 8, 3:59 pm, "Jukka K. Korpela" <jkorp...@cs.tut.fi> wrote:
>> ExpiresByType text/html "access plus 7 days"
>
> Thank you muchly. This is exactly what I was looking for!
> (I'm going with "3 days" instead of 7.)
>
> I see lots of Google hits for "ExpiresByType" but no mention
> of this option if I Google ".htaccess tutorial" or such.
>
> This is the 2nd or 3rd time I've had quick useful responses
> here for my website questions. Maybe I should visit here
> more often.
>
> James

Good to see your questions.
If the Answer was not HTML,
Then it have to bing.com Hot-Text.

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