CoHTTP is an OCaml library for creating HTTP daemons. It has a portable HTTP parser, and implementations using various asynchronous programming libraries:

• Cohttp_lwt_unix uses the Lwt library, and specifically the UNIX bindings.
• Cohttp_async uses the Async library from Jane Street.
• Cohttp_lwt_mirage uses the Mirage interface to generate standalone microkernels.

You can implement other targets using parser very easily. Look at the lib/IO.ml signature, and implement that in the desired backend.

You can activate some runtime debugging by setting COHTTP_DEBUG to any value, and all requests and responses will be written to stderr.

For build requirements, please see the _oasis file, or use OPAM to install it from http://github.com/OCamlPro/opam