Core API

This chapter explains the central components of Hyper, called the Core API. While focusing heavily on safety, Hyper tries to provide an open API that can support multiple PureScript backends, and different styles of web applications.

The design of Hyper is inspired by a number of projects. The middleware chain lends much from Plug, an abstract HTTP interface in Elixir, that enables various HTTP libraries to inter-operate. You might also find similarities with connect in NodeJS. On the type system side, Hyper tries to bring in ideas from Haskell and Idris, specifically the use of phantom types and GADTs to lift invariants to the type level and increase safety.

The central components of the Core API are:

• Conn
• Middleware
• Response State Transitions
• Servers