Cannot get cohttp_eio to work

Learning
1

Hi,

on my journey of learning ocaml I am trying to use cohttp-eio. I just copied the example from the repository:

open Cohttp_eio

let () = Logs.set_reporter (Logs_fmt.reporter ())

and () =
  (* The eio backend does not leverage domains yet, but might in the near future *)
  Logs_threaded.enable ()

and () = Logs.Src.set_level Cohttp_eio.src (Some Debug)

let () =
  Eio_main.run @@ fun env ->
  let client = Client.make env#net in
  Eio.Switch.run @@ fun sw ->
  let resp, body = Client.get ~sw client (Uri.of_string "http://example.com") in
  if Http.Status.compare resp.status `OK = 0 then
    print_string @@ Eio.Buf_read.(parse_exn take_all) body ~max_size:max_int
  else Fmt.epr "Unexpected HTTP status: %a" Http.Status.pp resp.status

But dune build gives me:

File "bin/main.ml", line 9, characters 28-42:
9 | and () = Logs.Src.set_level Cohttp_eio.src (Some Debug)
                                ^^^^^^^^^^^^^^
Error: Unbound value Cohttp_eio.src

If I comment out the set_level line I get:

11 |   let client = Client.make env#net in
                    ^^^^^^^^^^^
Error: Unbound value Client.make
Had 1 error, waiting for filesystem changes...

Any Idea what is going wrong here?

2

It seems that you want to use these examples, as they are in sync with the latest (alpha) release.

Indeed Cohttp_eio.src did not exist in august

Or maybe explore from cloning the repo?

3

See here for a working example: Use cohttp-eio server by yawaramin · Pull Request #1 · chrstntdd/ocaml_http · GitHub

Pay especially close attention to the library dependencies inside the dune file.