Can i hide parts of a webpage content via some Apache module?

Hello,

there are Apache modules like pagespeed which rewrite page upon serving it to the customer
there is mod_security module which i hope can also do actions based on page content

so how can i please hide/remove parts of webpage while sending it from the server to the visitor?

Example, i want to remove this from certain or all Apache served pages:

<a href="http://badsite.com/?a=123">Link text</a>

HTML:

so my question is how to do it please? How to intercept/modify data Apache is going to send to my website visitor? Thank you in advance

 

I might be wrong,
but I don't think you could do this on the server level.
I believe you would need to fetch the web page first, then remove the link based on a predefined regex (could be done with javascript, but also with PHP) and then serve it to the visitor. This would require you to act as a proxy between the origin and the visitor and depending on the number of visitors and different sites which you need to process, it might be quite expensive in terms of server resources.

 

You could probably do this via one of the proxy-scripts for Apache - Varnish, for instance. However, this is quite demanding on server resources, and would normally be running on a separate server, not on the same box as the webserver itself.

 

thx, i need some tutorial or example, so if no one knows how to do it exactly (i do not use Varnish, i use Apache+Mod Security), please share phrasse/s that i will search in Google to discover how to do it. Thx