PUBLIC MARKS with tags http & internet

IE WebDeveloper is an add-on for Microsoft Internet Explorer. The rich web debugging toolset allows you to inspect and edit the live HTML DOM and current cascaded styles, evaluate expressions and display error messages, log messages, explore source code of webpage and monitor DHTML Event and HTTP Traffic.

Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP traffic between their machine and the Internet. This includes requests, responses and the HTTP headers (which contain the cookies and caching information). Charles can act as a man-in-the-middle for HTTP/SSL communication, enabling you to debug the content of your HTTPS sessions.

Ajax blog

how to install and configure the simple, fast, and powerful thttpd to serve simple static and generated content very quickly.

The minimum you have to know about HTTP.