[Caml-list] Ocamlnet, netclient and lwt_preemptive causing ocsigen segfault

[pierrchp@free.fr]

 Hello,

I have a web application written using lwt and ocsigen that needs to get data
using https.

In order to do that, I use the Http_client.Convenience module from Ocamlnet, and
use Lwt.detach to perform the call (there probably is a smater way to do this, I
am open to any suggestion). The http call is performed and the data is
displayed, but then the server crashed, apparently because of a segfault.

here is the code for a test eliom module that reproduce the problem, compiled
using

ocamlfind ocamlc -c -thread -package
equeue-ssl,netclient,lwt,lwt.preemptive,ocsigen test_server.ml

Cheers


-Pierre


(*************************************)

open Lwt
open XHTML.M
open Eliom_services
open Eliom_parameters
open Eliom_sessions
open Eliom_predefmod.Xhtml;;




(* initialising Http_client.Convenience to use https *)
  Ssl.init();

   Http_client.Convenience.configure_pipeline
      (fun p ->
         let ctx = Ssl.create_context Ssl.TLSv1 Ssl.Client_context in
             let tct = Https_client.https_transport_channel_type ctx in
                  p # configure_transport Http_client.https_cb_id tct
      )
;;



module H =  Http_client.Convenience


let test_service = new_service ~path:[""]
                               ~get_params:unit
  ()
;;


let test_handler = fun sp () () ->
(* thread that request data from a url *)
Lwt_preemptive.detach (function () -> H.http_get "https://ocsigen.org") () >>=
function s ->
(*page that display the data*)
 return (
html (head (title (pcdata "test")) [])
     (body [
          h1 [pcdata "the data are:"];
          p [ pcdata s]
           ]
     )
)
;;
register test_service test_handler;;