如何在Python中加载网站的所有资源，包括AJAX请求等？

I know how to request a web site and read its text with Python. In the past, I've tried using a library like BeautifulSoup to make all of the requests to links on a site, but that doesn't get things that don't look like full urls, such as AJAX requests and most requests to the original domain (since the "I know how to request a web site and read its t