I believe Apache can run user-defined scripts to perform this sort of thing -- in this case, look at a page's content and decide how to proceed. But high-volume sites don't like such things because it dramatically slows page loading.
<script>if (document.body.innerHTML.match(...)) {load_script(https://...)}</script>
I believe Apache can run user-defined scripts to perform this sort of thing -- in this case, look at a page's content and decide how to proceed. But high-volume sites don't like such things because it dramatically slows page loading.