Readable notes about requests, representations, caching and errors. Start with simple concepts and follow them into concrete HTTP examples.
A short reading path through requests, representations and responses.
Read section ↗02 / ESSENTIALSMethods, status codes and headers in context.
Read section ↗03 / GUIDEAn ordinary round trip from client to server and back.
Read section ↗04 / GUIDEFreshness, validators and what a 304 actually means.
Read section ↗These notes explain common HTTP behaviour using examples grounded in documented standards. They are written for readers inspecting web traffic, building a static site or debugging a reverse proxy.
The examples are illustrative requests, not functioning endpoints on this domain. No sign-in, tracking, simulated API or download is required to read them.