Read Html of our site pages and check for certain content

[sasrsc]

I would like to rotate through all the .aspx in the Site Pages directory that begin with "Destination"

I then want to look to see if there's content in a certain place.

My method for doing that is to get the index count where there is <h1>This Section</h2> and compare that to where the index count of <h1>Next Section</h1> is.

If the numbers vary greatly then I know someone has added content. Of course in the html (view source) there's loads of crazy sharepoint web part code but I can figure out if the difference exceeds x then that likely means someone has done what they were needed to do.
I'm stuck.
I can get the files (get properties)

But what do I need to do to get the content (the html) of those files?
Which action item provides that?

and for a bonus how to I filter with ODATA to only show me .aspx files beginning with the word destination?

As always - thank you.