Catch and Modify XHR requests from Facebook with Chrome Extension

Question

Trying to catch and modify XHR requests from Facebook.com. The exact request URL is

https://www.facebook.com/ajax/composerx/attachment/link/scraper/?scrape_url= {A URL GOES HERE}.

Is this possible with a chrome extension? Searched everywhere to no avail.

Answer 1

I believe what you want is http://developer.chrome.com/extensions/webRequest.html#event-onCompleted

If you want to modify what is getting sent out, then I think what you'll want is onBeforeRequest handler to be registered.