Chapter 1Mapping Our Route
Welcome! We’re about to go exploring, and it’s going to be a blast. We’re going to do what many of us say we love most—play with new languages, experiment with new techniques, and expand our understanding of writing software for the web. Whenever you go exploring, it’s important to have a map, a good idea of where you’re headed, and a plan for how you’ll get there. That’s what this chapter is all about.
Many early client-server systems were stateful. Servers kept working state in memory. They passed messages back and forth with their clients over persistent connections. Think of a banking system with a central mainframe and a dedicated terminal for each teller. This worked because the number of clients was small. ...
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