On a high level: You can certainly skip most of "Message Syntax and Routing". That's the stuff that concerns server and client implementers that just have tcp

On a high level: You can certainly skip most of "Message Syntax and Routing". That's the stuff that concerns server and client implementers that just have tcp sockets to work with. I would absolutely read "Semantics and Content". It's a really good idea to be aware of "Conditional Requests", and you only really have to read "Caching", "Range requests" and "Authentication" if you need to know about those features.