[WP Super Cache] Couple of questions?

Oops. I was incorrect above. Having “$cache_enabled = false;” in wp-cache-config.php disables WP Super Cache caching but still serves the already cached pages.

Basically I have to find a way to redirect user agents just away from wp-cache since I am already able to do so away from wp super cache.

Does anyone have any ideas how to route certain user agents around WP Cache?

Yes, use the exclude options in the admin page.

Hello donncha. Thanks for the response.

I am not familiar with the exclude option. Could you explain more? Are you talking about the rejected UA strings? If so doesn’t this only prevent these user agents froom creating cached pages? How would you prevent a user agent from picking up a cached page. My goal is to have pages cached by say a user agent of IE so the next IE user would pick up a cached page but a user agent of BlackBerry would not pick up the same cached page.

Any help is appreciated. Thanks.

You can exclude certain browsers from generating cached files, but you can’t stop those user agents from being served cached content.

If you switch the plugin to half-on mode, and write a supercache plugin that hooks into the “wp_cache_get_cookies_values” action you can make cache files user-agent dependent so an IE user will only ever see the IE cached page.

OK. Not sure I am advanced enough to write that hook but I will attempt here in the near future to see if I can.

I appreciate the response and the suggestion. Seems like a logical way to make it successful.

Thanks again.

If you want to exclude certain user-agents from seeing static-cached pages, you just need to add some RewriteCond statements to the root .htaccess.

i.e. to block all user-agents with “bot” in their name you’d just add a RewriteCond to the beginning of the 2 rewrite rules WP Super Cache inserts into .htaccess like this:

# This very first RewriteCond is the new one:
RewriteCond %{HTTP_USER_AGENT} !bot
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP_COOKIE} !^.*(comment_author_|wordpress|wp-postpass_).*$
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html.gz -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html.gz [L]

(and then the same RewriteCond added before the next rule, which sends browsers to non-gz static pages)

Here’s what I did to solve this problem:

I wanted to prevent iPhone browsers from generating super-cached HTML as well as from receiving super-cached HTML from previous hits.

1. In the WP-Super-Cache settings page, I added “iPhone” to the “Rejected User Agents” list (as well as iPod, Android, BlackBerry, etc). You can get a list of these from wp-cache-config.php. This prevents any hits from an iPhone from generating a cached file.

2. In my /.htaccess file, I added these lines to the WP-Super-Cache Rewrite conditions to prevent iPhone user agents from receiving any cached files that have been generated:

# BEGIN WPSuperCache
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
AddDefaultCharset UTF-8
RewriteCond %{REQUEST_URI} !^.*[^/]$
RewriteCond %{REQUEST_URI} !^.*//.*$
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress|wp-postpass_).*$
# ADDED THIS LINE TO PASS-THROUGH MOBILE USER AGENTS
RewriteCond %{HTTP_USER_AGENT} !(iPhone|iPod|Android|Danger|Playstation|BlackBerry)
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html.gz -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html.gz [L]

RewriteCond %{REQUEST_URI} !^.*[^/]$
RewriteCond %{REQUEST_URI} !^.*//.*$
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress|wp-postpass_).*$
# ADDED THIS LINE TO PASS-THROUGH MOBILE USER AGENTS
RewriteCond %{HTTP_USER_AGENT} !(iPhone|iPod|Android|Danger|Playstation|BlackBerry)
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html [L]
</IfModule>
# END WPSuperCache

Seems to work so far…I’ll have to do some more testing.