capturing and saving web traffic via autoit

Is there a way to capture and save web traffic on a specific process such as a web browser with AutoIt ?

For Example like this -> http://kb.daypilot.org/81542/how-to-record-network-activity-using-ie-developer-tools/

or a tool like this -> http://www.fiddlercap.com/FiddlerCap/

There are many tools on the web. but none of them fast enough. i need something fast for recording & capturing, ajax & xml requests on a web browser and saving them to a file.

Is there a tool like this with AutoIt ?