Can i setup lastmodiffied if modiffied headers to my vbulleting pages?

[postcd]

Hello,

i want to setup some information in return headers that tells crawling bot that forum topic (for example) was not modiffied so he should not redownload page.

How can i do this please? I already have last-modiffied headers for certain file types, but not for whole page which is what i want..

There are some examples: https://stackoverflow.com/questions/...aders-with-php
But im unsure how example i can do it in vbuleltin?
Thank you

[Zachery]

Why would you want to do this? It'd be a fair amount of effort, vs the returned reward.

[postcd]

Why You think that that reward is low? I think it is quite important to save server load by telling brosers/bots to not download page again..

[ozzy47]

If you are worried about server load, from bots downloading text, you need to look into another host.

Anyhow, you can set this in .htaccess
# START Expires Headers

ExpiresActive On
ExpiresDefault "access plus 1 seconds"
ExpiresByType text/html "access plus 1 seconds"
ExpiresByType text/css A2628000
ExpiresByType text/richtext A3600
ExpiresByType image/svg+xml A3600
ExpiresByType text/plain A3600
ExpiresByType text/xsd A3600
ExpiresByType text/xsl A3600
ExpiresByType video/asf A2628000
ExpiresByType video/avi A2628000
ExpiresByType image/bmp A2628000
ExpiresByType application/java A2628000
ExpiresByType video/divx A2628000
ExpiresByType application/msword A2628000
ExpiresByType application/x-msdownload A2628000
ExpiresByType image/gif A2628000
ExpiresByType application/x-gzip A2628000
ExpiresByType image/x-icon A2628000
ExpiresByType image/jpeg A2628000
ExpiresByType application/vnd.ms-access A2628000
ExpiresByType audio/midi A2628000
ExpiresByType video/quicktime A2628000
ExpiresByType audio/mpeg A2628000
ExpiresByType video/mp4 A2628000
ExpiresByType video/mpeg A2628000
ExpiresByType application/javascript A2628000
ExpiresByType application/x-javascript A2628000
ExpiresByType application/vnd.ms-project A2628000
ExpiresByType application/vnd.oasis.opendocument.database A2628000
ExpiresByType application/vnd.oasis.opendocument.chart A2628000
ExpiresByType application/vnd.oasis.opendocument.formula A2628000
ExpiresByType application/vnd.oasis.opendocument.graphics A2628000
ExpiresByType application/vnd.oasis.opendocument.presentation A2628000
ExpiresByType application/vnd.oasis.opendocument.spreadsheet A2628000
ExpiresByType application/vnd.oasis.opendocument.text A2628000
ExpiresByType audio/ogg A2628000
ExpiresByType application/pdf A2628000
ExpiresByType image/png A2628000
ExpiresByType application/vnd.ms-powerpoint A2628000
ExpiresByType audio/x-realaudio A2628000
ExpiresByType application/x-shockwave-flash A2628000
ExpiresByType application/x-tar A2628000
ExpiresByType image/tiff A2628000
ExpiresByType audio/wav A2628000
ExpiresByType audio/wma A2628000
ExpiresByType application/vnd.ms-write A2628000
ExpiresByType application/vnd.ms-excel A2628000
ExpiresByType application/zip A2628000

# END Expires Headers

[postcd]

I already setup last modiffied headers, but dynamic thread/topic vbulletin pages appears to do not have global expire headers set. It has this set only for elements like images, css etc. But im talking about whole page expire information....

[Zachery]

So, you do realize if you send a cache for html content, the browser/bot/etc wont recheck it, until it has expired, even if there is new content, right?

[postcd]

Someone makes a new post, how is anyone going to get it without mashing F5 to force a reload?

thats a good point. in this case i guess there is no other easy way to achieve changing Last-modiffied/expires time once new reply/new topic is posted than using some content management system module?.. HTTP response headers then sends last. mod. date to the browser and browser redownload page if date is newer than cached version. any vbulletin hack for this please?

[Zachery]

But the browser wont request them if the expires is already set.

[ozzy47]

Like was mentioned earlier, there would be to much coding to get it to work right, for so little payoff. If you are looking to save server load, it's time to upgrade your server.