Dream is a feature-complete Web framework with a simple programming model and no boilerplate. It provides only two data types, request and response.

Almost everything else is either a built-in OCaml type, or an abbreviation for a bare function. For example, a Web app, known in Dream as a handler, is just an ordinary function from requests to responses. And a middleware is then just a function from handlers to handlers.

Within this model, Dream adds:

• Session management with pluggable back ends.
• A fully composable router.
• Support for HTTP/1.1, HTTP/2, and HTTPS.
• WebSockets.
• GraphQL, including subscriptions and a built-in GraphiQL editor.
• SQL connection pool helpers.
• Server-side HTML templates.
• Automatic secure handling of cookies and forms.
• Unified, internationalization-friendly error handling.
• A neat log, and OCaml runtime configuration.
• Helpers for Web formats, such as Base64url, and a modern cipher.

Because of the simple programming model, everything is optional and composable. It is trivailly possible to strip Dream down to just a bare driver of the various HTTP protocols.

Dream is presented as a single module, whose API is documented on one page. In addition, Dream comes with a large number of examples. Security topics are introduced throughout, wherever they are applicable.