Import new version of vendors/ocplib-resto

The new version of ocplib-resto :

- uses jbuilder ;
- is functorized over `Json_encoding` rather than `Json_repr` ;
- handles query parameters ;
- handles HTTP methods (GET, POST, DELETE, PUT, PATCH) ;
- replaces `custom_service` by a more generic trailer argument ;
- replaces generic answer `(code, body)` by a more ad-hoc sum type
  (allowing distinct encoding for success and error) ;
- includes a minimal HTTP-server based on Cohttp
  (includings CORS and media type negotiation).
- adds a function `Directory.transparent_lookup` to lookup/call
  a service handler without serializing the various parameters
  (path, query, request body).

As a first consequences in Tezos, this patch allows binary
communication between the client and the node.

This patch tries to be minimal inside the tezos source code and
therefore it introduces a minimal compatibility layer in
`RPC.ml`. This code should be removed as soon as possible.

.dockerignore

@@ -1,6 +1,6 @@
 
 _build
-tezos.install
+**/*.install
 
 tezos-node
 tezos-protocol-compiler

.gitignore

@@ -1,6 +1,6 @@
 
 /_build
-/tezos.install
+*.install
 
 /tezos-node
 /tezos-protocol-compiler

scripts/install_build_deps.sh

@@ -19,7 +19,6 @@ set -x
 opam pin --yes add --no-action --dev-repo sodium
 opam pin --yes add --no-action --dev-repo ocp-ocamlres
 opam pin --yes add --no-action --dev-repo ocplib-json-typed
-opam pin --yes add --no-action --dev-repo ocplib-resto
 ## Force opam to take account of the new `tezos-deps.opam`
 opam pin --yes remove tezos
 opam pin --yes add --no-action tezos $src_dir

src/client/client_generic_rpcs.ml

@@ -176,12 +176,10 @@ module StringMap = Map.Make(String)
 let rec count =
   let open RPC.Description in
   function
+  | Empty -> 0
   | Dynamic _ -> 1
-  | Static { service ; subdirs } ->
+  | Static { services ; subdirs } ->
-      let service =
+      let service = RPC.MethMap.cardinal services in
-        match service with
-        | None -> 0
-        | Some _ -> 1 in
       let subdirs =
         match subdirs with
         | None -> 0
@@ -213,11 +211,19 @@ let list url cctxt =
         Format.fprintf ppf "<%s>%a" arg.RPC.Arg.name display_paragraph descr
   in
   let display_service ppf (_path, tpath, service) =
-    Format.fprintf ppf "- /%s" (String.concat "/" tpath) ;
+    Format.fprintf ppf "- %s /%s"
+      (RPC.string_of_meth service.meth)
+      (String.concat "/" tpath) ;
     match service.description with
     | None | Some "" -> ()
     | Some description -> display_paragraph ppf description
   in
+  let display_services ppf (_path, tpath, services) =
+    Format.pp_print_list
+      (fun ppf (_,s) -> display_service ppf (_path, tpath, s))
+      ppf
+      (RPC.MethMap.bindings services)
+  in
   let rec display ppf (path, tpath, tree) =
     match tree with
     | Dynamic description -> begin
@@ -226,23 +232,23 @@ let list url cctxt =
         | None | Some "" -> ()
         | Some description -> display_paragraph ppf description
       end
-    | Static { service = None ; subdirs = None } -> ()
+    | Empty -> ()
-    | Static { service = Some service ; subdirs = None } ->
+    | Static { services ; subdirs = None } ->
-        display_service ppf (path, tpath, service)
+        display_services ppf (path, tpath, services)
-    | Static { service ; subdirs = Some (Suffixes subdirs) } -> begin
+    | Static { services ; subdirs = Some (Suffixes subdirs) } -> begin
-        match service, StringMap.bindings subdirs with
+        match RPC.MethMap.cardinal services, StringMap.bindings subdirs with
-        | None, [] -> ()
+        | 0, [] -> ()
-        | None, [ n, solo ] ->
+        | 0, [ n, solo ] ->
             display ppf (path @ [ n ], tpath @ [ n ], solo)
-        | None, items when count tree >= 3 && path <> [] ->
+        | _, items when count tree >= 3 && path <> [] ->
             Format.fprintf ppf "@[<v 2>+ %s/@,%a@]"
               (String.concat "/" path) (display_list tpath) items
-        | Some service, items when count tree >= 3 && path <> [] ->
+        | _, items when count tree >= 3 && path <> [] ->
             Format.fprintf ppf "@[<v 2>+ %s@,%a@,%a@]"
               (String.concat "/" path)
-              display_service (path, tpath, service)
+              display_services (path, tpath, services)
               (display_list tpath) items
-        | None, (n, t) :: items ->
+        | 0, (n, t) :: items ->
             Format.fprintf ppf "%a"
               display (path @ [ n ], tpath @ [ n ], t) ;
             List.iter
@@ -250,22 +256,23 @@ let list url cctxt =
                  Format.fprintf ppf "@,%a"
                    display (path @ [ n ], tpath @ [ n ], t))
               items
-        | Some service, items ->
+        | _, items ->
-            display_service ppf (path, tpath, service) ;
+            display_services ppf (path, tpath, services) ;
             List.iter
               (fun (n, t) ->
                  Format.fprintf ppf "@,%a"
                    display (path @ [ n ], tpath @ [ n ], t))
               items
       end
-    | Static { service = None ; subdirs = Some (Arg (arg, solo)) } ->
+    | Static { services ; subdirs = Some (Arg (arg, solo)) }
+      when RPC.MethMap.cardinal services = 0 ->
         collect arg ;
         let name = Printf.sprintf "<%s>" arg.RPC.Arg.name in
         display ppf (path @ [ name ], tpath @ [ name ], solo)
-    | Static { service = Some service ;
+    | Static { services;
                subdirs = Some (Arg (arg, solo)) } ->
         collect arg ;
-        display_service ppf (path, tpath, service) ;
+        display_services ppf (path, tpath, services) ;
         Format.fprintf ppf "@," ;
         let name = Printf.sprintf "<%s>" arg.RPC.Arg.name in
         display ppf (path @ [ name ], tpath @ [ name ], solo)
@@ -286,11 +293,22 @@ let schema url cctxt =
   let args = Utils.split '/' url in
   let open RPC.Description in
   Client_node_rpcs.describe cctxt.rpc_config ~recurse:false args >>=? function
-  | Static { service = Some { input ; output } } ->
+  | Static { services } -> begin
+      match RPC.MethMap.find `POST services with
+      | exception Not_found ->
+          cctxt.message
+            "No service found at this URL (but this is a valid prefix)\n%!" >>= fun () ->
+          return ()
+      | { input = Some input ; output } ->
           let json = `O [ "input", Json_schema.to_json input ;
                           "output", Json_schema.to_json output ] in
           cctxt.message "%a" Json_repr.(pp (module Ezjsonm)) json >>= fun () ->
           return ()
+      | { input = None ; output } ->
+          let json = `O [ "output", Json_schema.to_json output ] in
+          cctxt.message "%a" Json_repr.(pp (module Ezjsonm)) json >>= fun () ->
+          return ()
+    end
   | _ ->
       cctxt.message
         "No service found at this URL (but this is a valid prefix)\n%!" >>= fun () ->
@@ -300,7 +318,13 @@ let format url cctxt =
   let args = Utils.split '/' url in
   let open RPC.Description in
   Client_node_rpcs.describe cctxt.rpc_config ~recurse:false args >>=? function
-  | Static { service = Some { input ; output } } ->
+  | Static { services } -> begin
+      match RPC.MethMap.find `POST services with
+      | exception Not_found ->
+          cctxt.message
+            "No service found at this URL (but this is a valid prefix)\n%!" >>= fun () ->
+          return ()
+      | { input = Some input ; output } ->
           cctxt.message
             "@[<v 0>\
              @[<v 2>Input format:@,%a@]@,\
@@ -309,6 +333,14 @@ let format url cctxt =
             Json_schema.pp input
             Json_schema.pp output >>= fun () ->
           return ()
+      | { input = None ; output } ->
+          cctxt.message
+            "@[<v 0>\
+             @[<v 2>Output format:@,%a@]@,\
+             @]"
+            Json_schema.pp output >>= fun () ->
+          return ()
+    end
   | _ ->
       cctxt.message
         "No service found at this URL (but this is a valid prefix)\n%!" >>= fun () ->
@@ -325,7 +357,14 @@ let call url cctxt =
   let args = Utils.split '/' url in
   let open RPC.Description in
   Client_node_rpcs.describe cctxt.rpc_config ~recurse:false args >>=? function
-  | Static { service = Some { input } } -> begin
+  | Static { services } -> begin
+      match RPC.MethMap.find `POST services with
+      | exception Not_found ->
+          cctxt.message
+            "No service found at this URL (but this is a valid prefix)\n%!" >>= fun () ->
+          return ()
+      | { input = None } -> assert false (* TODO *)
+      | { input = Some input } ->
           fill_in input >>= function
           | Error msg ->
               cctxt.error "%s" msg >>= fun () ->

src/client/client_node_rpcs.ml

@@ -42,8 +42,17 @@ let complete cctxt ?block prefix =
   | Some block ->
       call_service2 cctxt Services.Blocks.complete block prefix ()
 
-let describe config ?recurse path =
+let describe config ?(recurse = true) path =
-  call_describe0 config Services.describe path recurse
+  let { RPC.Service.meth ; path } =
+    RPC.Service.forge_request Node_rpc_services.describe
+      ((), path) { RPC.Description.recurse } in
+  get_json config meth path (`O []) >>=? fun json ->
+  match Data_encoding.Json.destruct (RPC.Service.output_encoding Node_rpc_services.describe) json with
+  | exception msg ->
+      let msg =
+        Format.asprintf "%a" (fun x -> Data_encoding.Json.print_error x) msg in
+      failwith "Failed to parse Json answer: %s" msg
+  | v -> return v
 
 module Blocks = struct
 

src/client/client_node_rpcs.mli

@@ -177,4 +177,4 @@ val complete:
 val describe:
   config ->
   ?recurse:bool -> string list ->
-  RPC.Description.directory_descr tzresult Lwt.t
+  Data_encoding.json_schema RPC.Description.directory tzresult Lwt.t

src/client/client_rpcs.ml

@@ -192,7 +192,9 @@ let make_request config log_request meth service json =
   let reqbody = Data_encoding_ezjsonm.to_string json in
   Lwt.catch begin fun () ->
     let body = Cohttp_lwt_body.of_string reqbody in
-    Cohttp_lwt_unix.Client.call meth ~body uri >>= fun (code, ansbody) ->
+    Cohttp_lwt_unix.Client.call
+      (meth :> Cohttp.Code.meth)
+      ~body uri >>= fun (code, ansbody) ->
     log_request uri json >>= fun reqid ->
     return (reqid, code.Cohttp.Response.status, ansbody)
   end begin fun exn ->
@@ -257,10 +259,12 @@ let get_json config meth service json =
       fail config (Request_failed (service, err))
 
 let parse_answer config service path json =
-  match RPC.read_answer service json with
+  match Data_encoding.Json.destruct (RPC.Service.output_encoding service) json with
-  | Error msg ->
+  | exception msg ->
+      let msg =
+        Format.asprintf "%a" (fun x -> Data_encoding.Json.print_error x) msg in
       fail config (Unexpected_json (path, json, msg))
-  | Ok v -> return v
+  | v -> return v
 
 let call_service0 cctxt service arg =
   let meth, path, arg = RPC.forge_request service () arg in
@@ -302,10 +306,12 @@ let call_streamed_service1 cctxt service arg1 arg2 =
   call_streamed cctxt service (RPC.forge_request service ((), arg1) arg2)
 
 let parse_err_answer config service path json =
-  match RPC.read_answer service json with
+  match Data_encoding.Json.destruct (RPC.Service.output_encoding service) json with
-  | Error msg -> (* TODO print_error *)
+  | exception msg -> (* TODO print_error *)
+      let msg =
+        Format.asprintf "%a" (fun x -> Data_encoding.Json.print_error x) msg in
       fail config (Unexpected_json (path, json, msg))
-  | Ok v -> Lwt.return v
+  | v -> Lwt.return v
 
 let call_err_service0 cctxt service arg =
   let meth, path, arg = RPC.forge_request service () arg in
@@ -322,11 +328,6 @@ let call_err_service2 cctxt service a1 a2 arg =
   get_json cctxt meth path arg >>=? fun json ->
   parse_err_answer cctxt service path json
 
-let call_describe0 cctxt service path arg =
-  let meth, prefix, arg = RPC.forge_request service () arg in
-  get_json cctxt meth (prefix @ path) arg >>=? fun json ->
-  parse_answer cctxt service prefix json
-
 type block = Node_rpc_services.Blocks.block
 
 let last_baked_block = function

src/client/client_rpcs.mli

@@ -73,11 +73,6 @@ val call_err_service2:
   (unit, (unit * 'a) * 'b, 'i, 'o tzresult) RPC.service ->
   'a -> 'b -> 'i -> 'o tzresult Lwt.t
 
-val call_describe0:
-  config ->
-  (unit, unit, 'a, 'b) RPC.service ->
-  string list -> 'a -> 'b tzresult Lwt.t
-
 type block = Node_rpc_services.Blocks.block
 
 val last_baked_block:

src/environment/v1/RPC.mli

@@ -13,10 +13,20 @@
     function. However, it cannot register new or update existing
     procedures afterwards, neither can it see other procedures. *)
 
+(** HTTP methods. *)
+type meth = [
+  | `GET
+  | `POST
+  | `DELETE
+  | `PUT
+  | `PATCH
+]
+
 (** Typed path argument. *)
 module Arg : sig
 
-  type 'a arg
+  type 'a t
+  type 'a arg = 'a t
   val make:
     ?descr:string ->
     name:string ->
@@ -40,10 +50,12 @@ end
 (** Parametrized path to services. *)
 module Path : sig
 
-  type ('prefix, 'params) path
+  type ('prefix, 'params) t
+  type ('prefix, 'params) path = ('prefix, 'params) t
   type 'prefix context = ('prefix, 'prefix) path
 
-  val root: 'a context
+  val root: unit context
+  val open_root: 'a context
 
   val add_suffix:
     ('prefix, 'params) path -> string -> ('prefix, 'params) path
@@ -51,9 +63,14 @@ module Path : sig
     ('prefix, 'params) path -> string -> ('prefix, 'params) path
 
   val add_arg:
-    ('prefix, 'params) path -> 'a Arg.arg -> ('prefix, 'params * 'a) path
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a) path
   val (/:):
-    ('prefix, 'params) path -> 'a Arg.arg -> ('prefix, 'params * 'a) path
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a) path
+
+  val add_final_args:
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a list) path
+  val (/:*):
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a list) path
 
   val prefix:
     ('prefix, 'a) path -> ('a, 'params) path -> ('prefix, 'params) path
@@ -63,100 +80,249 @@ module Path : sig
 
 end
 
+module Query : sig
+
+  type 'a t
+  type 'a query = 'a t
+
+  val empty: unit query
+
+  type ('a, 'b) field
+  val field:
+    ?descr: string ->
+    string -> 'a Arg.t -> 'a -> ('b -> 'a) -> ('b, 'a) field
+
+  type ('a, 'b, 'c) open_query
+  val query: 'b -> ('a, 'b, 'b) open_query
+  val (|+):
+    ('a, 'b, 'c -> 'd) open_query ->
+    ('a, 'c) field -> ('a, 'b, 'd) open_query
+  val seal: ('a, 'b, 'a) open_query -> 'a t
+
+  type untyped = (string * string) list
+  exception Invalid of string
+  val parse: 'a query -> untyped -> 'a
+
+end
+
 (** Services. *)
-type ('prefix, 'params, 'input, 'output) service
+module Service : sig
 
-(** HTTP methods as defined in Cohttp.Code *)
+  type (+'meth, 'prefix, 'params, 'query, 'input, 'output, 'error) t
-type meth = [
+    constraint 'meth = [< meth ]
-  | `GET
+  type (+'meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service =
-  | `POST
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) t
-  | `HEAD
-  | `DELETE
-  | `PATCH
-  | `PUT
-  | `OPTIONS
-  | `TRACE
-  | `CONNECT
-  | `Other of string
-]
 
-val service:
+  val query:
-  ?meth: meth ->
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'query Query.t
+
+  type _ input =
+    | No_input : unit input
+    | Input : 'input Data_encoding.t -> 'input input
+
+  val input_encoding:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'input input
+
+  val output_encoding:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'output Data_encoding.t
+
+  val error_encoding:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'error Data_encoding.t
+
+  val prefix:
+    ('prefix, 'inner_prefix) Path.t ->
+    ('meth, 'inner_prefix, 'params, 'query,
+     'input, 'output, 'error) service ->
+    ('meth, 'prefix, 'params,
+     'query, 'input, 'output, 'error) service
+
+  val map:
+    ('a -> 'b) ->
+    ('b -> 'a) ->
+    ('meth, 'pr, 'a, 'q, 'i, 'o, 'e) service ->
+    ('meth, 'pr, 'b, 'q, 'i, 'o, 'e) service
+
+  val get_service:
     ?description: string ->
+    query: 'query Query.t ->
+    output: 'output Data_encoding.t ->
+    error: 'error Data_encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `GET ], 'prefix, 'params, 'query, unit, 'output, 'error) service
+
+  val post_service:
+    ?description: string ->
+    query:'query Query.t ->
     input: 'input Data_encoding.t ->
     output: 'output Data_encoding.t ->
-  ('prefix, 'params) Path.path ->
+    error: 'error Data_encoding.t ->
-  ('prefix, 'params, 'input, 'output) service
+    ('prefix, 'params) Path.t ->
+    ([ `POST ], 'prefix, 'params, 'query, 'input, 'output, 'error) service
+
+  val delete_service:
+    ?description: string ->
+    query:'query Query.t ->
+    output: 'output Data_encoding.t ->
+    error: 'error Data_encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `DELETE ], 'prefix, 'params, 'query, unit, 'output, 'error) service
+
+  val patch_service:
+    ?description: string ->
+    query:'query Query.t ->
+    input: 'input Data_encoding.t ->
+    output: 'output Data_encoding.t ->
+    error: 'error Data_encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `PATCH ], 'prefix, 'params, 'query, 'input, 'output, 'error) service
+
+  val put_service:
+    ?description: string ->
+    query:'query Query.t ->
+    input: 'input Data_encoding.t ->
+    output: 'output Data_encoding.t ->
+    error: 'error Data_encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `PUT ], 'prefix, 'params, 'query, 'input, 'output, 'error) service
+
+end
 
 module Answer : sig
 
   (** Return type for service handler *)
-  type 'a answer =
+  type ('o, 'e) t =
-    { code : int ;
+    [ `Ok of 'o (* 200 *)
-      body : 'a output ;
+    | `OkStream of 'o stream (* 200 *)
-    }
+    | `Created of string option (* 201 *)
-
+    | `No_content (* 204 *)
-  and 'a output =
+    | `Unauthorized of 'e option (* 401 *)
-    | Empty
+    | `Forbidden of 'e option (* 403 *)
-    | Single of 'a
+    | `Not_found of 'e option (* 404 *)
-    | Stream of 'a stream
+    | `Conflict of 'e option (* 409 *)
+    | `Error of 'e option (* 500 *)
+    ]
 
   and 'a stream = {
     next: unit -> 'a option Lwt.t ;
     shutdown: unit -> unit ;
   }
 
-  val ok: 'a -> 'a answer
+  val return: 'o -> ('o, 'e) t Lwt.t
-  val answer: ?code:int -> 'a -> 'a answer
+  val return_stream: 'o stream -> ('o, 'e) t Lwt.t
-  val return: ?code:int -> 'a -> 'a answer Lwt.t
 
 end
 
-(** Dispatch tree *)
+module Directory : sig
-type 'prefix directory
 
+  (** Dispatch tree *)
+  type 'prefix t
+  type 'prefix directory = 'prefix t
+
+  (** Empty list of dispatch trees *)
   val empty: 'prefix directory
 
+  val map: ('a -> 'b) -> 'b directory -> 'a directory
+
+  val prefix: ('pr, 'p) Path.path -> 'p directory -> 'pr directory
+  val merge: 'a directory -> 'a directory -> 'a directory
+
+  (** Possible error while registring services. *)
+  type step =
+    | Static of string
+    | Dynamic of Arg.descr
+    | DynamicTail of Arg.descr
+
+  type conflict =
+    | CService of meth | CDir | CBuilder | CTail
+    | CTypes of Arg.descr *
+                Arg.descr
+    | CType of Arg.descr * string list
+  exception Conflict of step list * conflict
+
   (** Registring handler in service tree. *)
   val register:
     'prefix directory ->
-  ('prefix, 'params, 'input, 'output) service ->
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) Service.t ->
-  ('params -> 'input -> 'output Answer.answer Lwt.t) ->
+    ('params -> 'query -> 'input -> [< ('output, 'error) Answer.t ] Lwt.t) ->
     'prefix directory
 
   (** Registring handler in service tree. Curryfied variant.  *)
+  val register0:
+    unit directory ->
+    ('m, unit, unit, 'q, 'i, 'o, 'e) Service.t ->
+    ('q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    unit directory
+
+  val register1:
+    'prefix directory ->
+    ('m, 'prefix, unit * 'a, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register2:
+    'prefix directory ->
+    ('m, 'prefix, (unit * 'a) * 'b, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register3:
+    'prefix directory ->
+    ('m, 'prefix, ((unit * 'a) * 'b) * 'c, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'c -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register4:
+    'prefix directory ->
+    ('m, 'prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'c -> 'd -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register5:
+    'prefix directory ->
+    ('m, 'prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+end
+
+(** Compatibility layer, to be removed ASAP. *)
+
+type 'a directory = 'a Directory.t
+
+type ('prefix, 'params, 'input, 'output) service =
+  ([ `POST ], 'prefix, 'params, unit, 'input, 'output, unit) Service.t
+
+val service:
+  ?description: string ->
+  input: 'input Data_encoding.t ->
+  output: 'output Data_encoding.t ->
+  ('prefix, 'params) Path.t ->
+  ('prefix, 'params, 'input, 'output) service
+
+val register:
+  'prefix directory ->
+  ('prefix, 'params, 'input, 'output) service ->
+  ('params -> 'input -> [< ('output, unit) Answer.t ] Lwt.t) ->
+  'prefix directory
+
 val register0:
   unit directory ->
   (unit, unit, 'i, 'o) service ->
-  ('i -> 'o Answer.answer Lwt.t) ->
+  ('i -> [< ('o, unit) Answer.t ] Lwt.t) ->
   unit directory
 
 val register1:
   'prefix directory ->
   ('prefix, unit * 'a, 'i, 'o) service ->
-  ('a -> 'i -> 'o Answer.answer Lwt.t) ->
+  ('a -> 'i -> [< ('o, unit) Answer.t ] Lwt.t) ->
   'prefix directory
 
 val register2:
   'prefix directory ->
   ('prefix, (unit * 'a) * 'b, 'i, 'o) service ->
-  ('a -> 'b -> 'i -> 'o Answer.answer Lwt.t) ->
+  ('a -> 'b -> 'i -> [< ('o, unit) Answer.t ] Lwt.t) ->
-  'prefix directory
-
-val register3:
-  'prefix directory ->
-  ('prefix, ((unit * 'a) * 'b) * 'c, 'i, 'o) service ->
-  ('a -> 'b -> 'c -> 'i -> 'o Answer.answer Lwt.t) ->
-  'prefix directory
-
-val register4:
-  'prefix directory ->
-  ('prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'i, 'o) service ->
-  ('a -> 'b -> 'c -> 'd -> 'i -> 'o Answer.answer Lwt.t) ->
-  'prefix directory
-
-val register5:
-  'prefix directory ->
-  ('prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'i, 'o) service ->
-  ('a -> 'b -> 'c -> 'd -> 'e -> 'i -> 'o Answer.answer Lwt.t) ->
   'prefix directory

src/minutils/RPC.ml

@@ -7,255 +7,174 @@
 (*                                                                        *)
 (**************************************************************************)
 
-open Lwt.Infix
+module Data = struct
+  type 'a t = 'a Data_encoding.t
+  type schema = Data_encoding.json_schema
+  let unit = Data_encoding.empty
+  let schema = Data_encoding.Json.schema
+  module StringMap = Map.Make(String)
 
-module Arg = Resto.Arg
+  let arg_encoding =
-module Path = Resto.Path
+    let open Data_encoding in
+    conv
+      (fun {Resto.Arg.name; descr} -> (name, descr))
+      (fun (name, descr) -> {name; descr})
+      (obj2 (req "name" string) (opt "descr" string))
 
-(* Services *)
+  open Resto.Description
 
-(* HTTP methods as defined in Cohttp.Code *)
+  let meth_encoding =
-type meth = [
+    Data_encoding.string_enum
-  | `GET
+      [ "GET", `GET ;
-  | `POST
+        "POST", `POST ;
-  | `HEAD
+        "DELETE", `DELETE ;
-  | `DELETE
+        "PUT", `PUT ;
-  | `PATCH
+        "PATCH", `PATCH ]
-  | `PUT
+
-  | `OPTIONS
+  let path_item_encoding =
-  | `TRACE
+    let open Data_encoding in
-  | `CONNECT
+    union [
-  | `Other of string
+      case ~tag:0 string
+        (function PStatic s -> Some s | _ -> None)
+        (fun s -> PStatic s) ;
+      case ~tag:1 arg_encoding
+        (function PDynamic s -> Some s | _ -> None)
+        (fun s -> PDynamic s) ;
     ]
 
+  let query_item_encoding =
+    let open Data_encoding in
+    conv
+      (fun {name ; description} -> (name, description))
+      (fun (name, description) -> {name ; description})
+      (obj2 (req "name" string) (opt "description" string))
+
+  let service_descr_encoding =
+    let open Data_encoding in
+    conv
+      (fun { meth ; path ; description ; query ; input ; output ; error } ->
+         (meth, path, description, query, input, output, error))
+      (fun (meth, path, description, query, input, output, error) ->
+         { meth ; path ; description ; query ; input ; output ; error })
+      (obj7
+         (req "meth" meth_encoding)
+         (req "path" (list path_item_encoding))
+         (opt "description" string)
+         (req "query" (list query_item_encoding))
+         (opt "input" json_schema)
+         (req "output" json_schema)
+         (req "erro" json_schema))
+
+  let directory_descr_encoding =
+    let open Data_encoding in
+    mu "service_tree" @@ fun directory_descr_encoding ->
+    let static_subdirectories_descr_encoding =
+      union [
+        case ~tag:0 (obj1 (req  "suffixes"
+                      (list (obj2 (req "name" string)
+                               (req "tree" directory_descr_encoding)))))
+          (function Suffixes map ->
+             Some (StringMap.bindings map) | _ -> None)
+          (fun m ->
+             let add acc (n,t) =  StringMap.add n t acc in
+             Suffixes (List.fold_left add StringMap.empty m)) ;
+        case ~tag:1 (obj1 (req "dynamic_dispatch"
+                      (obj2
+                         (req "arg" arg_encoding)
+                         (req "tree" directory_descr_encoding))))
+          (function Arg (ty, tree) -> Some (ty, tree) | _ -> None)
+          (fun (ty, tree) -> Arg (ty, tree))
+      ] in
+
+    let static_directory_descr_encoding =
+      conv
+        (fun { services ; subdirs } ->
+           let find s =
+             try Some (Resto.MethMap.find s services) with Not_found -> None in
+           (find `GET, find `POST, find `DELETE,
+            find `PUT, find `PATCH, subdirs))
+        (fun (get, post, delete, put, patch, subdirs) ->
+           let add meth s services =
+             match s with
+             | None -> services
+             | Some s -> Resto.MethMap.add meth s services in
+           let services =
+             Resto.MethMap.empty
+             |> add `GET get
+             |> add `POST post
+             |> add `DELETE delete
+             |> add `PUT put
+             |> add `PATCH patch in
+           { services ; subdirs })
+        (obj6
+           (opt "get_service" service_descr_encoding)
+           (opt "post_service" service_descr_encoding)
+           (opt "delete_service" service_descr_encoding)
+           (opt "put_service" service_descr_encoding)
+           (opt "patch_service" service_descr_encoding)
+           (opt "subdirs" static_subdirectories_descr_encoding)) in
+    union [
+      case ~tag:0 (obj1 (req "static" static_directory_descr_encoding))
+        (function Static descr -> Some descr | _ -> None)
+        (fun descr -> Static descr) ;
+      case ~tag:1 (obj1 (req "dynamic" (option string)))
+        (function Dynamic descr -> Some descr | _ -> None)
+        (fun descr -> Dynamic descr) ;
+    ]
+
+  let description_request_encoding =
+    let open Data_encoding in
+    conv
+      (fun { recurse } -> recurse)
+      (function recurse -> { recurse })
+      (obj1 (dft "recursive" bool false))
+
+  let description_answer_encoding = directory_descr_encoding
+
+end
+
+include Resto
+include RestoDirectory
+module Directory = RestoDirectory.MakeDirectory(Data)
+module Service = Directory.Service
+
+
+(* Compatibility layer, to be removed ASAP. *)
+
+type 'a directory = 'a Directory.t
 type ('prefix, 'params, 'input, 'output) service =
-  meth * ('prefix, 'params, 'input, 'output) Resto.service
+  ([ `POST ], 'prefix, 'params, unit, 'input, 'output, unit) Service.t
 
-(* The default HTTP method for services *)
+let service ?description ~input ~output path =
-let default_meth = `POST
+  Service.post_service
-
-(* Commonly used REST HTTP methods *)
-let rest_meths = [`GET; `POST; `HEAD; `DELETE; `PATCH; `PUT; `OPTIONS]
-
-let string_of_method = function
-  | `GET -> "GET"
-  | `POST -> "POST"
-  | `HEAD -> "HEAD"
-  | `DELETE -> "DELETE"
-  | `PATCH -> "PATCH"
-  | `PUT -> "PUT"
-  | `OPTIONS -> "OPTIONS"
-  | `TRACE -> "TRACE"
-  | `CONNECT -> "CONNECT"
-  | `Other s -> s
-
-let service ?(meth = default_meth) ?description ~input ~output path =
-  (meth,
-   Resto.service
     ?description
-     ~input:(Data_encoding.Json.convert input)
+    ~query: Query.empty
-     ~output:(Data_encoding.Json.convert output)
+    ~input
-     path)
+    ~output
-
+    ~error: Data_encoding.null
-(* REST services *)
-
-(* GET service: no input body *)
-let get_service ?description ~output path =
-  service ~meth:`GET ?description
-    ~input:Data_encoding.empty ~output
     path
 
-(* HEAD service: same as GET, but without output body *)
+type directory_descr = Data_encoding.json_schema Description.directory
-let head_service ?description path =
-  service ~meth:`HEAD ?description
-    ~input:Data_encoding.empty ~output:Data_encoding.empty
-    path
 
-let post_service ?description ~input ~output path =
+let empty = Directory.empty
-  service ~meth:`POST ?description ~input ~output path
+let register d s f = Directory.register d s (fun p () i -> f p i)
 
-let put_service ?description ~input ~output path =
+open Directory.Curry
-  service ~meth:`PUT ?description ~input ~output path
+let register0 root s f = register root s (curry Z f)
+let register1 root s f = register root s (curry (S Z) f)
+let register2 root s f = register root s (curry (S (S Z)) f)
+(* let register3 root s f = register root s (curry (S (S (S Z))) f) *)
+(* let register4 root s f = register root s (curry (S (S (S (S Z)))) f) *)
+(* let register5 root s f = register root s (curry (S (S (S (S (S Z))))) f) *)
 
-let delete_service ?description ~input ~output path =
+let register_dynamic_directory1 =
-  service ~meth:`DELETE ?description ~input ~output path
+  Directory.register_dynamic_directory1
 
-let prefix p (meth, s) = (meth, RestoDirectory.prefix p s)
+let forge_request (type i) (service: (_,_,_,_,i,_,_) Service.t) params body =
-
+  let { Service.meth ; path } =
-let forge_request (meth, service) params input =
+    Service.forge_request service params () in
-  let path, arg = Resto.forge_request service params input in
+  let json =
-  meth, path, arg
+    match Service.input_encoding service with
-
+    | Service.No_input -> assert false (* TODO *)
-let read_answer (_meth, service) json =
+    | Service.Input input -> Data_encoding.Json.construct input body in
-  Resto.read_answer service json
+  meth, path, json
-
-module Description = struct
-
-  include Resto.Description
-
-  let service ?(meth = default_meth) ?description path =
-    (meth, Resto.Description.service ?description path)
-
-end
-
-module Answer = struct
-
-  include RestoDirectory.Answer
-
-  let answer ?(code = 200) json = { code; body = Single json }
-  let return ?code json = Lwt.return (answer ?code json)
-
-end
-
-
-type step = RestoDirectory.step =
-  | Static of string
-  | Dynamic of Arg.descr
-
-type conflict = RestoDirectory.conflict =
-  | CService
-  | CDir
-  | CBuilder
-  | CCustom
-  | CTypes of Arg.descr * Arg.descr
-  | CType of Arg.descr * string list
-
-exception Conflict = RestoDirectory.Conflict
-exception Cannot_parse = RestoDirectory.Cannot_parse
-
-(* Dispatch *)
-
-type 'prefix directory = (meth * 'prefix RestoDirectory.directory) list
-
-let empty = []
-
-let map_dirs f dirs =
-  List.map (fun (meth, dir) -> (meth, f ~meth dir)) dirs
-
-let map f dirs =
-  map_dirs (fun ~meth:_ dir -> RestoDirectory.map f dir) dirs
-
-let prefix path dirs =
-  map_dirs (fun ~meth:_ dir -> RestoDirectory.prefix path dir) dirs
-
-let merge dirs1 dirs2 =
-  let compare (meth1, _dir1) (meth2, _dir2) = compare meth1 meth2 in
-  let f (meth1, dir1) (_, dir2) = (meth1, RestoDirectory.merge dir1 dir2) in
-  Utils.merge_list2 ~compare ~f dirs1 dirs2
-
-(*****************************************************************************
- * Registration
- ****************************************************************************)
-
-(** [replace_assoc ~init ~f k l] searches for value corresponding to [k] in an
-    association list, and replaces it with [f value]. If not found, a new pair
-    [(k, f init)] is added to the list. *)
-(* TODO: move to Utils? *)
-let replace_assoc ?(finalize = List.rev) ~init ~f key l =
-  let rec aux acc = function
-    | [] -> finalize ((key, f init) :: acc)
-    | (k, v) :: tl when k = key -> finalize ((key, f v) :: acc) @ tl
-    | hd :: tl -> aux (hd :: acc) tl
-  in
-  aux [] l
-
-(* Register [service] to the directory with corresponding [meth] using [reg] *)
-let register dirs (meth, service) handler =
-  let init = RestoDirectory.empty in
-  let f dir = RestoDirectory.register dir service handler in
-  replace_assoc ~init ~f meth dirs
-
-(* Register dynamic directory *)
-
-(* By default, the [builder] function of dynamic directory is registered for
-   HTTP methods listed in [rest_meths] *)
-let register_dynamic_directory
-    ?(meths = rest_meths) ?descr init_dirs path builder =
-  let builder' ~meth prefix =
-    builder prefix >>= fun dirs ->
-    Lwt.return (List.assoc meth dirs)
-  in
-  let init = RestoDirectory.empty in
-  List.fold_left (fun dirs meth ->
-      let f dir =
-        RestoDirectory.register_dynamic_directory
-          ?descr dir path (builder' ~meth)
-      in
-      replace_assoc ~init ~f meth dirs)
-    init_dirs meths
-
-(* Register custom lookup *)
-
-type custom_lookup = RestoDirectory.custom_lookup
-
-let register_custom_lookup ?(meth = default_meth) ?descr dirs s f =
-  let init = RestoDirectory.empty in
-  let f dir = RestoDirectory.register_custom_lookup ?descr dir s f in
-  replace_assoc ~init ~f meth dirs
-
-(* Register description service *)
-
-let register_describe_directory_service dirs (meth, service) =
-  let init = RestoDirectory.empty in
-  let f dir = RestoDirectory.register_describe_directory_service dir service in
-  replace_assoc ~init ~f meth dirs
-
-(*****************************************************************************
- * Lookup
- ****************************************************************************)
-
-let lookup dirs ?(meth = default_meth) args path =
-  let dir = List.assoc meth dirs in
-  RestoDirectory.lookup dir args path
-
-(*****************************************************************************
- * Currying
- ****************************************************************************)
-
-(* Service registration *)
-
-let register0 root s f =
-  register root s RestoDirectory.Internal.(curry Z f)
-
-let register1 root s f =
-  register root s RestoDirectory.Internal.(curry (S Z) f)
-
-let register2 root s f =
-  register root s RestoDirectory.Internal.(curry (S (S Z)) f)
-
-let register3 root s f =
-  register root s RestoDirectory.Internal.(curry (S (S (S Z))) f)
-
-let register4 root s f =
-  register root s RestoDirectory.Internal.(curry (S (S (S (S Z)))) f)
-
-let register5 root s f =
-  register root s RestoDirectory.Internal.(curry (S (S (S (S (S Z))))) f)
-
-(* Dynamic directory registration *)
-
-let register_dynamic_directory1 ?descr root s f =
-  register_dynamic_directory
-    ?descr root s RestoDirectory.Internal.(curry (S Z) f)
-
-let register_dynamic_directory2 ?descr root s f =
-  register_dynamic_directory
-    ?descr root s RestoDirectory.Internal.(curry (S (S Z)) f)
-
-let register_dynamic_directory3 ?descr root s f =
-  register_dynamic_directory
-    ?descr root s RestoDirectory.Internal.(curry (S (S (S Z))) f)
-
-(* Custom lookup registration *)
-
-let register_custom_lookup1 ?meth ?descr root s f =
-  register_custom_lookup ?meth ?descr root s
-    RestoDirectory.Internal.(curry (S Z) f)
-
-let register_custom_lookup2 ?meth ?descr root s f =
-  register_custom_lookup ?meth ?descr root s
-    RestoDirectory.Internal.(curry (S (S Z)) f)
-
-let register_custom_lookup3 ?meth ?descr root s f =
-  register_custom_lookup ?meth ?descr root s
-    RestoDirectory.Internal.(curry (S (S (S Z))) f)

src/minutils/RPC.mli

@@ -9,263 +9,55 @@
 
 (** Typed RPC services: definition, binding and dispatch. *)
 
-(** Typed path argument. *)
-module Arg : sig
 
-  type 'a arg
+module Data : Resto.ENCODING with type 'a t = 'a Data_encoding.t
-  val make:
+                              and type schema = Data_encoding.json_schema
-    ?descr:string ->
-    name:string ->
-    destruct:(string -> ('a, string) result) ->
-    construct:('a -> string) ->
-    unit -> 'a arg
 
-  type descr = {
+include (module type of struct include Resto end)
-    name: string ;
+include (module type of struct include RestoDirectory end)
-    descr: string option ;
+module Directory : (module type of struct include RestoDirectory.MakeDirectory(Data) end)
-  }
+module Service : (module type of struct include Directory.Service end)
-  val descr: 'a arg -> descr
 
-  val int: int arg
+(** Compatibility layer, to be removed ASAP. *)
-  val int32: int32 arg
-  val int64: int64 arg
-  val float: float arg
 
-end
+type 'a directory = 'a Directory.t
-
+type ('prefix, 'params, 'input, 'output) service =
-(** Parametrized path to services. *)
+  ([ `POST ], 'prefix, 'params, unit, 'input, 'output, unit) Service.t
-module Path : sig
-
-  type ('prefix, 'params) path
-  type 'prefix context = ('prefix, 'prefix) path
-
-  val root: 'a context
-
-  val add_suffix:
-    ('prefix, 'params) path -> string -> ('prefix, 'params) path
-  val (/):
-    ('prefix, 'params) path -> string -> ('prefix, 'params) path
-
-  val add_arg:
-    ('prefix, 'params) path -> 'a Arg.arg -> ('prefix, 'params * 'a) path
-  val (/:):
-    ('prefix, 'params) path -> 'a Arg.arg -> ('prefix, 'params * 'a) path
-
-  val prefix:
-    ('prefix, 'a) path -> ('a, 'params) path -> ('prefix, 'params) path
-
-  val map:
-    ('a -> 'b) -> ('b -> 'a) -> ('prefix, 'a) path -> ('prefix, 'b) path
-
-end
-
-(** HTTP methods as defined in Cohttp.Code *)
-
-type meth = [
-  | `GET
-  | `POST
-  | `HEAD
-  | `DELETE
-  | `PATCH
-  | `PUT
-  | `OPTIONS
-  | `TRACE
-  | `CONNECT
-  | `Other of string
-]
-
-val string_of_method : meth -> string
-
-(** Services. *)
-type ('prefix, 'params, 'input, 'output) service
 
 val service:
-  ?meth: meth ->
   ?description: string ->
   input: 'input Data_encoding.t ->
   output: 'output Data_encoding.t ->
-  ('prefix, 'params) Path.path ->
+  ('prefix, 'params) Path.t ->
   ('prefix, 'params, 'input, 'output) service
 
-val get_service:
+type directory_descr = Data_encoding.json_schema Description.directory
-  ?description: string ->
-  output: 'output Data_encoding.t ->
-  ('prefix, 'params) Path.path ->
-  ('prefix, 'params, unit, 'output) service
 
-val head_service:
+val empty: 'a directory
-  ?description: string ->
-  ('prefix, 'params) Path.path ->
-  ('prefix, 'params, unit, unit) service
-
-val post_service:
-  ?description: string ->
-  input: 'input Data_encoding.t ->
-  output: 'output Data_encoding.t ->
-  ('prefix, 'params) Path.path ->
-  ('prefix, 'params, 'input, 'output) service
-
-val put_service:
-  ?description: string ->
-  input: 'input Data_encoding.t ->
-  output: 'output Data_encoding.t ->
-  ('prefix, 'params) Path.path ->
-  ('prefix, 'params, 'input, 'output) service
-
-val delete_service:
-  ?description: string ->
-  input: 'input Data_encoding.t ->
-  output: 'output Data_encoding.t ->
-  ('prefix, 'params) Path.path ->
-  ('prefix, 'params, 'input, 'output) service
-
-val prefix:
-  ('prefix, 'inner_prefix) Path.path ->
-  ('inner_prefix, 'params, 'input, 'output) service ->
-  ('prefix, 'params, 'input, 'output) service
-
-val forge_request:
-  (unit, 'params, 'input, 'output) service ->
-  'params -> 'input -> meth * string list * Data_encoding.json
-
-val read_answer:
-  (unit, 'params, 'input, 'output) service ->
-  Data_encoding.json -> ('output, string) result
-
-(** Service directory description *)
-module Description : sig
-
-  type service_descr = {
-    description: string option ;
-    input: Json_schema.schema ;
-    output: Json_schema.schema ;
-  }
-
-  type directory_descr =
-    | Static of static_directory_descr
-    | Dynamic of string option
-
-  and static_directory_descr = {
-    service: service_descr option ;
-    subdirs: static_subdirectories_descr option ;
-  }
-
-  and static_subdirectories_descr =
-    | Suffixes of directory_descr Map.Make(String).t
-    | Arg of Arg.descr * directory_descr
-
-  val service:
-    ?meth: meth ->
-    ?description:string ->
-    ('prefix, 'params) Path.path ->
-    ('prefix, 'params, bool option, directory_descr) service
-
-  val pp_print_directory_descr:
-    Format.formatter -> directory_descr -> unit
-
-end
-
-module Answer : sig
-
-  (** Return type for service handler *)
-  type 'a answer =
-    { code : int ;
-      body : 'a output ;
-    }
-
-  and 'a output =
-    | Empty
-    | Single of 'a
-    | Stream of 'a stream
-
-  and 'a stream = {
-    next: unit -> 'a option Lwt.t ;
-    shutdown: unit -> unit ;
-  }
-
-  val ok: 'a -> 'a answer
-  val answer: ?code:int -> 'a -> 'a answer
-  val return: ?code:int -> 'a -> 'a answer Lwt.t
-  val return_stream: 'a stream -> 'a answer Lwt.t
-
-end
-
-(** Dispatch tree *)
-type 'prefix directory
-
-(** Empty list of dispatch trees *)
-val empty: 'prefix directory
-
-val map: ('a -> 'b) -> 'b directory -> 'a directory
-
-val prefix: ('pr, 'p) Path.path -> 'p directory -> 'pr directory
-val merge: 'a directory -> 'a directory -> 'a directory
-
-(** Possible error while registring services. *)
-type step =
-  | Static of string
-  | Dynamic of Arg.descr
-type conflict =
-  | CService | CDir | CBuilder | CCustom
-  | CTypes of Arg.descr *
-              Arg.descr
-  | CType of Arg.descr * string list
-exception Conflict of step list * conflict
-
-(** Registring handler in service tree. *)
 val register:
   'prefix directory ->
   ('prefix, 'params, 'input, 'output) service ->
-  ('params -> 'input -> 'output Answer.answer Lwt.t) ->
+  ('params -> 'input -> [< ('output, unit) RestoDirectory.Answer.t ] Lwt.t) ->
   'prefix directory
 
-(** Registring handler in service tree. Curryfied variant.  *)
 val register0:
   unit directory ->
   (unit, unit, 'i, 'o) service ->
-  ('i -> 'o Answer.answer Lwt.t) ->
+  ('i -> [< ('o, unit) Answer.t ] Lwt.t) ->
   unit directory
 
 val register1:
   'prefix directory ->
   ('prefix, unit * 'a, 'i, 'o) service ->
-  ('a -> 'i -> 'o Answer.answer Lwt.t) ->
+  ('a -> 'i -> [< ('o, unit) Answer.t ] Lwt.t) ->
   'prefix directory
 
 val register2:
   'prefix directory ->
   ('prefix, (unit * 'a) * 'b, 'i, 'o) service ->
-  ('a -> 'b -> 'i -> 'o Answer.answer Lwt.t) ->
+  ('a -> 'b -> 'i -> [< ('o, unit) Answer.t ] Lwt.t) ->
   'prefix directory
 
-val register3:
-  'prefix directory ->
-  ('prefix, ((unit * 'a) * 'b) * 'c, 'i, 'o) service ->
-  ('a -> 'b -> 'c -> 'i -> 'o Answer.answer Lwt.t) ->
-  'prefix directory
-
-val register4:
-  'prefix directory ->
-  ('prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'i, 'o) service ->
-  ('a -> 'b -> 'c -> 'd -> 'i -> 'o Answer.answer Lwt.t) ->
-  'prefix directory
-
-val register5:
-  'prefix directory ->
-  ('prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'i, 'o) service ->
-  ('a -> 'b -> 'c -> 'd -> 'e -> 'i -> 'o Answer.answer Lwt.t) ->
-  'prefix directory
-
-(** Registring dynamic subtree. *)
-val register_dynamic_directory:
-  ?meths:meth list ->
-  ?descr:string ->
-  'prefix directory ->
-  ('prefix, 'a) Path.path ->
-  ('a -> 'a directory Lwt.t) ->
-  'prefix directory
-
-(** Registring dynamic subtree. (Curryfied variant) *)
 val register_dynamic_directory1:
   ?descr:string ->
   'prefix directory ->
@@ -273,68 +65,7 @@ val register_dynamic_directory1:
   ('a -> (unit * 'a) directory Lwt.t) ->
   'prefix directory
 
-val register_dynamic_directory2:
+val forge_request:
-  ?descr:string ->
+  (unit, 'params, 'input, _) service ->
-  'prefix directory ->
+  'params -> 'input -> MethMap.key * string list * Data_encoding.json
-  ('prefix, (unit * 'a) * 'b) Path.path ->
-  ('a -> 'b -> ((unit * 'a) * 'b) directory Lwt.t) ->
-  'prefix directory
 
-val register_dynamic_directory3:
-  ?descr:string ->
-  'prefix directory ->
-  ('prefix, ((unit * 'a) * 'b) * 'c) Path.path ->
-  ('a -> 'b -> 'c -> (((unit * 'a) * 'b) * 'c) directory Lwt.t) ->
-  'prefix directory
-
-(** Registring custom directory lookup. *)
-type custom_lookup = RestoDirectory.custom_lookup
-(* | CustomService of Description.service_descr * *)
-(*                    ( Data_encoding.json option -> *)
-(*                      Data_encoding.json Answer.answer Lwt.t ) *)
-(* | CustomDirectory of Description.directory_descr *)
-
-val register_custom_lookup:
-  ?meth:meth ->
-  ?descr:string ->
-  'prefix directory ->
-  ('prefix, 'params) Path.path ->
-  ('params -> string list -> custom_lookup Lwt.t) ->
-  'prefix directory
-
-val register_custom_lookup1:
-  ?meth:meth ->
-  ?descr:string ->
-  'prefix directory ->
-  ('prefix, unit * 'a) Path.path ->
-  ('a -> string list -> custom_lookup Lwt.t) ->
-  'prefix directory
-
-val register_custom_lookup2:
-  ?meth:meth ->
-  ?descr:string ->
-  'prefix directory ->
-  ('prefix, (unit * 'a) * 'b) Path.path ->
-  ('a -> 'b -> string list -> custom_lookup Lwt.t) ->
-  'prefix directory
-
-val register_custom_lookup3:
-  ?meth:meth ->
-  ?descr:string ->
-  'prefix directory ->
-  ('prefix, ((unit * 'a) * 'b) * 'c) Path.path ->
-  ('a -> 'b -> 'c -> string list -> custom_lookup Lwt.t) ->
-  'prefix directory
-
-(** Registring a description service. *)
-val register_describe_directory_service:
-  'prefix directory ->
-  ('prefix, 'prefix, bool option, Description.directory_descr) service ->
-  'prefix directory
-
-exception Cannot_parse of Arg.descr * string * string list
-
-(** Resolve a service. *)
-val lookup:
-  'prefix directory -> ?meth:meth -> 'prefix -> string list ->
-  (Data_encoding.json option -> Data_encoding.json Answer.answer Lwt.t) Lwt.t

src/minutils/jbuild

@@ -6,7 +6,7 @@
   (libraries (cstruct
               lwt
               ocplib-json-typed.bson
-              ocplib-resto.directory
+              ocplib-resto-directory
               ocplib-endian.bigstring))
   (flags (:standard -w -9+27-30-32-40@8 -safe-string))
   (wrapped false)))

src/node/main/node_run_command.ml

@@ -176,7 +176,9 @@ let init_rpc (rpc_config: Node_config_file.rpc) node =
             port
             (if rpc_config.tls = None then "" else " (TLS enabled)") >>= fun () ->
           RPC_server.launch ~host mode dir
-            rpc_config.cors_origins rpc_config.cors_headers >>= fun server ->
+            ~media_types:RPC_server.[ json ; octet_stream ]
+            ~cors:{ allowed_origins = rpc_config.cors_origins ;
+                    allowed_headers = rpc_config.cors_headers } >>= fun server ->
           return (Some server)
 
 let init_signal () =

src/node/net/RPC_server.ml

@@ -7,255 +7,40 @@
 (*                                                                        *)
 (**************************************************************************)
 
-open RPC
+type cors = RestoCohttp.cors = {
-open Logging.RPC
+  allowed_headers : string list ;
+  allowed_origins : string list ;
+}
 
-(* public types *)
+include RestoCohttp.Make(RPC.Data)(Logging.RPC)
-type server = (* hidden *)
-  { shutdown : unit -> unit Lwt.t ;
-    mutable root : unit directory }
 
-module ConnectionMap = Map.Make(Cohttp.Connection)
+let json  = {
-
+  name = "application/json" ;
-exception Invalid_method of { allowed : RPC.meth list }
+  construct = begin fun enc v ->
-exception Cannot_parse_body of string
+    Data_encoding_ezjsonm.to_string @@
-
+    Data_encoding.Json.construct enc v
-let check_origin_matches origin allowed_origin =
+  end ;
-  String.equal "*" allowed_origin ||
+  destruct = begin fun enc body ->
-  String.equal allowed_origin origin ||
-  begin
-    let allowed_w_slash = allowed_origin ^ "/" in
-    let len_a_w_s = String.length allowed_w_slash in
-    let len_o = String.length origin in
-    (len_o >= len_a_w_s) &&
-    String.equal allowed_w_slash @@ String.sub origin 0 len_a_w_s
-  end
-
-let find_matching_origin allowed_origins origin =
-  let matching_origins = List.filter (check_origin_matches origin) allowed_origins in
-  let compare_by_length_neg a b = ~- (compare (String.length a) (String.length b)) in
-  let matching_origins_sorted = List.sort compare_by_length_neg matching_origins in
-  match matching_origins_sorted with
-  | [] -> None
-  | x :: _ -> Some x
-
-let make_cors_headers ?(headers=Cohttp.Header.init ())
-    cors_allowed_headers cors_allowed_origins origin_header =
-  let cors_headers = Cohttp.Header.add_multi headers
-      "Access-Control-Allow-Headers" cors_allowed_headers in
-  match origin_header with
-  | None -> cors_headers
-  | Some origin ->
-      match find_matching_origin cors_allowed_origins origin with
-      | None -> cors_headers
-      | Some allowed_origin ->
-          Cohttp.Header.add_multi cors_headers
-            "Access-Control-Allow-Origin" [allowed_origin]
-
-(* Promise a running RPC server. *)
-let launch ?pre_hook ?post_hook ?(host="::") mode root cors_allowed_origins cors_allowed_headers =
-  (* launch the worker *)
-  let cancelation, canceler, _ = Lwt_utils.canceler () in
-  let open Cohttp_lwt_unix in
-  let streams = ref ConnectionMap.empty in
-  let create_stream _io con to_string (s: _ Answer.stream) =
-    let running = ref true in
-    let stream =
-      Lwt_stream.from
-        (fun () ->
-           if not !running then Lwt.return None else
-             s.next () >|= function
-             | None -> None
-             | Some x -> Some (to_string x)) in
-    let shutdown () = running := false ; s.shutdown () in
-    streams := ConnectionMap.add con shutdown !streams ;
-    stream
-  in
-  let shutdown_stream con =
-    try ConnectionMap.find con !streams ()
-    with Not_found -> () in
-  let call_hook (io, con) req ?(answer_404 = false) hook =
-    match hook with
-    | None -> Lwt.return None
-    | Some hook ->
-        Lwt.catch
-          (fun () ->
-             hook (Uri.path (Cohttp.Request.uri req))
-             >>= fun (content_type, { Answer.code ; body }) ->
-             let headers =
-               match content_type with
-               | None -> Cohttp.Header.init ()
-               | Some ct -> Cohttp.Header.init_with "Content-Type" ct
-             in
-             if code = 404 && not answer_404 then
-               Lwt.return None
-             else
-               let body = match body with
-                 | Answer.Empty ->
-                     Cohttp_lwt_body.empty
-                 | Single body ->
-                     Cohttp_lwt_body.of_string body
-                 | Stream s ->
-                     let stream =
-                       create_stream io con (fun s -> s) s in
-                     Cohttp_lwt_body.of_stream stream in
-               Lwt.return_some
-                 (Response.make ~flush:true ~status:(`Code code) ~headers (),
-                  body))
-          (function
-            | Not_found -> Lwt.return None
-            | exn -> Lwt.fail exn) in
-  let callback (io, con) req body =
-    (* FIXME: check inbound adress *)
-    let path = Utils.split_path (Uri.path (Cohttp.Request.uri req)) in
-    let req_headers = Cohttp.Request.headers req in
-    let origin_header = Cohttp.Header.get req_headers "origin" in
-    let answer_with_cors_headers ?headers ?body status =
-      let headers = match headers with
-        | None -> Cohttp.Header.init ()
-        | Some headers -> headers in
-      let body = match body with
-        | None -> Cohttp_lwt_body.empty
-        | Some body -> body in
-      let headers =
-        make_cors_headers ~headers
-          cors_allowed_headers cors_allowed_origins origin_header in
-      Lwt.return (Response.make ~flush:true ~status ~headers (), body) in
-    lwt_log_info "(%s) receive request to %s"
-      (Cohttp.Connection.to_string con) (Uri.path (Cohttp.Request.uri req)) >>= fun () ->
-    Lwt.catch
-      (fun () ->
-         call_hook (io, con) req pre_hook >>= function
-         | Some res ->
-             Lwt.return res
-         | None ->
-             let existing_methods () =
-               let supported_meths =
-                 [ `OPTIONS ; `POST ; `PUT ; `PATCH ; `DELETE ; `GET ; `HEAD ] in
-               Lwt_list.filter_map_p
-                 (fun meth ->
-                    Lwt.catch
-                      (fun () ->
-                         lookup root ~meth () path >>= fun _handler ->
-                         Lwt.return_some meth)
-                      (function Not_found | Cannot_parse _ -> Lwt.return_none
-                              | exn -> Lwt.fail exn))
-                 supported_meths >>= function
-               | [] -> Lwt.fail Not_found (* No handler at all -> 404 *)
-               | meths -> Lwt.return meths in
-             Lwt.catch
-               (fun () ->
-                  lookup root ~meth:req.meth () path >>= fun handler ->
-                  Lwt.return_some handler)
-               (function Not_found | Cannot_parse _ -> Lwt.return_none
-                       | exn -> Lwt.fail exn) >>= function
-             | None ->
-                 begin
-                   (* Default OPTIONS handler for CORS preflight *)
-                   if req.meth = `OPTIONS && origin_header <> None then
-                     match Cohttp.Header.get req_headers
-                             "Access-Control-Request-Method" with
-                     | Some meth ->
-                         let meth = Cohttp.Code.method_of_string meth in
-                         lookup root ~meth () path >>= fun _handler ->
-                         (* unless [lookup] failed with [Not_found] -> 404 *)
-                         Lwt.return [ meth ]
-                     | None -> existing_methods ()
-                   else
-                     existing_methods () >>= fun allowed ->
-                     Lwt.fail (Invalid_method { allowed })
-                 end >>= fun cors_allowed_meths ->
-                 lwt_log_info "(%s) RPC preflight"
-                   (Cohttp.Connection.to_string con) >>= fun () ->
-                 let headers =
-                   Cohttp.Header.add_multi
-                     (Cohttp.Header.init ())
-                     "Access-Control-Allow-Methods"
-                     (List.map Cohttp.Code.string_of_method cors_allowed_meths) in
-                 answer_with_cors_headers ~headers `OK
-             | Some handler ->
-                 begin match req.meth with
-                   | `POST
-                   | `PUT
-                   | `PATCH
-                   | `DELETE -> begin
-                       Cohttp_lwt_body.to_string body >>= fun body ->
     match Data_encoding_ezjsonm.from_string body with
-                       | Error msg -> Lwt.fail (Cannot_parse_body msg)
+    | Error _ as err -> err
-                       | Ok body -> Lwt.return (Some body)
+    | Ok json ->
-                     end
+        try Ok (Data_encoding.Json.destruct enc json)
-                   | `GET
+        with Data_encoding.Json.Cannot_destruct (_, exn) ->
-                   | `HEAD
+          Error (Format.asprintf "%a"
-                   | `OPTIONS -> Lwt.return None
+                   (fun fmt -> Data_encoding.Json.print_error fmt)
-                   | _ ->
+                   exn)
-                       existing_methods () >>= fun allowed ->
+  end ;
-                       Lwt.fail (Invalid_method { allowed })
+}
-                 end >>= fun body ->
-                 handler body >>= fun { Answer.code ; body } ->
-                 let body = match body with
-                   | Empty ->
-                       Cohttp_lwt_body.empty
-                   | Single json ->
-                       Cohttp_lwt_body.of_string (Data_encoding_ezjsonm.to_string json)
-                   | Stream s ->
-                       let stream =
-                         create_stream io con Data_encoding_ezjsonm.to_string s in
-                       Cohttp_lwt_body.of_stream stream in
-                 lwt_log_info "(%s) RPC %s"
-                   (Cohttp.Connection.to_string con)
-                   (if Cohttp.Code.is_error code
-                    then "failed"
-                    else "success") >>= fun () ->
-                 let headers =
-                   Cohttp.Header.init_with "Content-Type" "application/json" in
-                 answer_with_cors_headers ~headers ~body (`Code code))
-      (function
-        | Not_found | Cannot_parse _ ->
-            lwt_log_info "(%s) not found"
-              (Cohttp.Connection.to_string con) >>= fun () ->
-            (call_hook (io, con) req ~answer_404: true post_hook >>= function
-              | Some res -> Lwt.return res
-              | None -> answer_with_cors_headers `Not_found)
-        | Invalid_method { allowed } ->
-            lwt_log_info "(%s) bad method"
-              (Cohttp.Connection.to_string con) >>= fun () ->
-            let headers =
-              Cohttp.Header.add_multi (Cohttp.Header.init ())
-                "Allow"
-                (List.map Cohttp.Code.string_of_method allowed) in
-            answer_with_cors_headers ~headers `Method_not_allowed
-        | Cannot_parse_body msg ->
-            lwt_log_info "(%s) can't parse RPC body"
-              (Cohttp.Connection.to_string con) >>= fun () ->
-            let body = Cohttp_lwt_body.of_string msg in
-            answer_with_cors_headers ~body `Bad_request
-        | e -> Lwt.fail e)
-  and conn_closed (_, con) =
-    log_info "connection closed %s" (Cohttp.Connection.to_string con) ;
-    shutdown_stream con  in
-  Conduit_lwt_unix.init ~src:host () >>= fun ctx ->
-  let ctx = Cohttp_lwt_unix_net.init ~ctx () in
-  let stop = cancelation () in
-  let on_exn = function
-    | Unix.Unix_error (Unix.EADDRINUSE, "bind", _) ->
-        log_error "RPC server port already taken, \
-                   the node will be shutdown" ;
-        Lwt_exit.exit 1
-    | Unix.Unix_error (ECONNRESET, _, _)
-    | Unix.Unix_error (EPIPE, _, _)  -> ()
-    | exn -> !Lwt.async_exception_hook exn
-  in
-  let server =
-    Server.create ~stop ~ctx ~mode ~on_exn
-      (Server.make ~callback ~conn_closed ()) in
-  let shutdown () =
-    canceler () >>= fun () ->
-    server in
-  Lwt.return { shutdown ; root }
 
-let root_service { root } = root
+let octet_stream = {
-
+  name = "application/octet-stream" ;
-let set_root_service server root = server.root <- root
+  construct = begin fun enc v ->
-
+    MBytes.to_string @@
-let shutdown server =
+    Data_encoding.Binary.to_bytes enc v
-  server.shutdown ()
+  end ;
+  destruct = begin fun enc s ->
+    match Data_encoding.Binary.of_bytes enc (MBytes.of_string s) with
+    | None -> Error "Failed to parse binary data."
+    | Some data -> Ok data
+  end ;
+}

src/node/net/RPC_server.mli

@@ -9,49 +9,31 @@
 
 (** Typed RPC services: server implementation. *)
 
+type cors = {
+  allowed_headers : string list ;
+  allowed_origins : string list ;
+}
+
+type media_type = {
+  name: string ;
+  construct: 'a. 'a Data_encoding.t -> 'a -> string ;
+  destruct: 'a. 'a Data_encoding.t -> string -> ('a, string) result ;
+}
+
+val json : media_type
+val octet_stream : media_type
+
 (** A handle on the server worker. *)
 type server
 
-(** Promise a running RPC server. To call an RPC at /p/a/t/h/ in the
+(** Promise a running RPC server.*)
-    provided service, one must call the URI /call/p/a/t/h/. Calling
-    /list/p/a/t/h/ will list the services prefixed by /p/a/t/h/, if
-    any. Calling /schema/p/a/t/h/ will describe the input and output
-    of the service, if it is callable. Calling /pipe will read a
-    sequence of services to call in sequence from the request body,
-    see {!pipe_encoding}.
-
-    The arguments cors_allowed_origins and cors_allowed_headers define
-    the cross-origin resource sharing using the headers
-    Access-Control-Allow-Origin and Access-Control-Allow-Headers. The
-    argument cors_allowed_headers sets the content of
-    Access-Control-Allow-Headers. Since you cannot have multiple
-    values for Access-Control-Allow-Origin, the server accepts a list
-    in cors_allowed_origins and matches it against the origin of the
-    incoming request; then returns the longest element of the passed
-    list as the content of Access-Control-Allow-Origin.
-
-    The optional [pre_hook] is called with the path part of the URL
-    before resolving each request, to delegate the answering to
-    another resolution mechanism. Its result is ignored if the return
-    code is [404]. The optional [post_hook] is called if both the
-    [pre_hook] and the serviced answered with a [404] code. [pre_hook] and
-    [post_hook] return a pair made of an optional Content-Type value and the
-    answer. *)
 val launch :
-  ?pre_hook: (string -> (string option * string RPC.Answer.answer) Lwt.t) ->
-  ?post_hook: (string -> (string option * string RPC.Answer.answer) Lwt.t) ->
   ?host:string ->
+  ?cors:cors ->
+  media_types:media_type list ->
   Conduit_lwt_unix.server ->
-  unit RPC.directory ->
+  unit RPC.Directory.t ->
-  string list ->
-  string list ->
   server Lwt.t
 
 (** Kill an RPC server. *)
 val shutdown : server -> unit Lwt.t
-
-(** Retrieve the root service of the server. *)
-val root_service : server -> unit RPC.directory
-
-(** Change the root service of the server. *)
-val set_root_service : server -> unit RPC.directory -> unit

src/node/net/jbuild

@@ -3,7 +3,7 @@
 (library
  ((name node_net)
   (public_name tezos.node.net)
-  (libraries (utils minutils conduit-lwt-unix cohttp cohttp-lwt-unix))
+  (libraries (utils minutils lwt.unix ocplib-resto-cohttp))
   (flags (:standard -w -9+27-30-32-40@8
                     -safe-string
                     -open Error_monad

src/node/shell/node.ml

@@ -522,8 +522,8 @@ module RPC = struct
     | Some rpc_context ->
         Context.get_protocol rpc_context.context >>= fun protocol_hash ->
         let (module Proto) = State.Registred_protocol.get_exn protocol_hash in
-        let dir = RPC.map (fun () -> rpc_context) Proto.rpc_services in
+        let dir = RPC.Directory.map (fun () -> rpc_context) Proto.rpc_services in
-        Lwt.return (Some (RPC.map (fun _ -> ()) dir))
+        Lwt.return (Some (RPC.Directory.map (fun _ -> ()) dir))
 
   let heads node =
     let net_state = Net_validator.net_state node.mainnet_validator in

src/node/shell/node_rpc.ml

@@ -533,5 +533,5 @@ let build_rpc_directory node =
         Node.RPC.Network.Point.events node point |> RPC.Answer.return in
     RPC.register1 dir Services.Network.Point.events implementation in
   let dir =
-    RPC.register_describe_directory_service dir Services.describe in
+    RPC.Directory.register_describe_directory_service dir Services.describe in
   dir

src/node/shell/node_rpc_services.ml

@@ -19,13 +19,14 @@ module Error = struct
       RPC.Path.(root / "errors")
 
   let encoding =
-    let meth, path, _ = RPC.forge_request service () () in
+    let { RPC.Service.meth ;  path ; _ } =
+      RPC.Service.forge_request service () () in
     describe
       ~description:
         (Printf.sprintf
            "The full list of error is available with \
             the global RPC `%s /%s`"
-           (RPC.string_of_method meth) (String.concat "/" path))
+           (RPC.string_of_meth meth) (String.concat "/" path))
       (conv
          ~schema:Json_schema.any
          (fun exn -> `A (List.map json_of_error exn))
@@ -749,6 +750,6 @@ let complete =
     RPC.Path.(root / "complete" /: prefix_arg )
 
 let describe =
-  RPC.Description.service
+  RPC.Service.description_service
     ~description: "RPCs documentation and input/output schema"
     RPC.Path.(root / "describe")

src/node/shell/node_rpc_services.mli

@@ -201,5 +201,4 @@ val bootstrapped: (unit, unit, unit, Block_hash.t * Time.t) RPC.service
 
 val complete: (unit, unit * string, unit, string list) RPC.service
 
-val describe:
+val describe: (unit, unit) RPC.Service.description_service
-  (unit, unit, bool option, RPC.Description.directory_descr) RPC.service

src/node/updater/updater.ml

@@ -137,7 +137,7 @@ module Node_protocol_environment_sigs = struct
        and type Tezos_data.Operation.t = Tezos_data.Operation.t
        and type Tezos_data.Block_header.shell_header = Tezos_data.Block_header.shell_header
        and type Tezos_data.Block_header.t = Tezos_data.Block_header.t
-       and type 'a RPC.directory = 'a RPC.directory
+       and type 'a RPC.Directory.t = 'a RPC.Directory.t
        and type Updater.validation_result = validation_result
        and type Updater.rpc_context = rpc_context
 

src/node/updater/updater.mli

@@ -99,7 +99,7 @@ module Node_protocol_environment_sigs : sig
        and type Tezos_data.Operation.t = Tezos_data.Operation.t
        and type Tezos_data.Block_header.shell_header = Tezos_data.Block_header.shell_header
        and type Tezos_data.Block_header.t = Tezos_data.Block_header.t
-       and type 'a RPC.directory = 'a RPC.directory
+       and type 'a RPC.Directory.t = 'a RPC.Directory.t
        and type Updater.validation_result = validation_result
        and type Updater.rpc_context = rpc_context
 

src/proto/alpha/services_registration.ml

@@ -26,11 +26,11 @@ let rpc_init
   Tezos_context.init ~level ~timestamp ~fitness context >>=? fun context ->
   return { block_hash ; block_header ; operation_hashes ; operations ; context }
 
-let rpc_services = ref (RPC.empty : Updater.rpc_context RPC.directory)
+let rpc_services = ref (RPC.Directory.empty : Updater.rpc_context RPC.directory)
 
 let register0_fullctxt s f =
   rpc_services :=
-    RPC.register !rpc_services (s RPC.Path.root)
+    RPC.register !rpc_services (s RPC.Path.open_root)
       (fun ctxt () ->
          ( rpc_init ctxt >>=? fun ctxt ->
            f ctxt ) >>= RPC.Answer.return)
@@ -38,19 +38,19 @@ let register0 s f = register0_fullctxt s (fun { context } -> f context)
 
 let register1_fullctxt s f =
   rpc_services :=
-    RPC.register !rpc_services (s RPC.Path.root)
+    RPC.register !rpc_services (s RPC.Path.open_root)
       (fun ctxt arg ->
          ( rpc_init ctxt >>=? fun ctxt ->
            f ctxt arg ) >>= RPC.Answer.return)
 let register1 s f = register1_fullctxt s (fun { context } x -> f context x)
 let register1_noctxt s f =
   rpc_services :=
-    RPC.register !rpc_services (s RPC.Path.root)
+    RPC.register !rpc_services (s RPC.Path.open_root)
       (fun _ arg -> f arg >>= RPC.Answer.return)
 
 let register2_fullctxt s f =
   rpc_services :=
-    RPC.register !rpc_services (s RPC.Path.root)
+    RPC.register !rpc_services (s RPC.Path.open_root)
       (fun (ctxt, arg1) arg2 ->
          ( rpc_init ctxt >>=? fun ctxt ->
            f ctxt arg1 arg2 ) >>= RPC.Answer.return)
@@ -208,7 +208,7 @@ let () =
 let () =
   let register2 s f =
     rpc_services :=
-      RPC.register !rpc_services (s RPC.Path.root)
+      RPC.register !rpc_services (s RPC.Path.open_root)
         (fun (ctxt, contract) arg ->
            ( rpc_init ctxt >>=? fun { context = ctxt } ->
              Contract.exists ctxt contract >>=? function

src/proto/demo/jbuild

@@ -52,4 +52,4 @@
   (deps ((glob_files *.ml)
          (glob_files *.mli)
          TEZOS_PROTOCOL))
-  (action (run ${exe:../../compiler_main.exe} dummy_genesis ${path-no-dep:.}))))
+  (action (chdir ${ROOT} (run ${exe:../../compiler_main.exe} dummy_genesis ${path-no-dep:.})))))

src/proto/demo/services.ml

@@ -46,17 +46,17 @@ let failing_service custom_root =
     RPC.Path.(custom_root / "failing")
 
 let rpc_services : Updater.rpc_context RPC.directory =
-  let dir = RPC.empty in
+  let dir = RPC.Directory.empty in
   let dir =
     RPC.register
       dir
-      (failing_service RPC.Path.root)
+      (failing_service RPC.Path.open_root)
       (fun _ctxt x -> Error.demo_error x >>= RPC.Answer.return)
   in
   let dir =
     RPC.register
       dir
-      (echo_service RPC.Path.root)
+      (echo_service RPC.Path.open_root)
       (fun _ctxt x -> RPC.Answer.return x)
   in
   dir

src/proto/genesis/jbuild

@@ -55,4 +55,4 @@
   (deps ((glob_files *.ml)
          (glob_files *.mli)
          TEZOS_PROTOCOL))
-  (action (run ${exe:../../compiler_main.exe} dummy_genesis ${path-no-dep:.}))))
+  (action (chdir ${ROOT} (run ${exe:../../compiler_main.exe} dummy_genesis ${path-no-dep:.})))))

src/proto/genesis/services.ml

@@ -59,11 +59,11 @@ let operations_hash =
   Operation_list_list_hash.compute []
 
 let rpc_services : Updater.rpc_context RPC.directory =
-  let dir = RPC.empty in
+  let dir = RPC.Directory.empty in
   let dir =
     RPC.register
       dir
-      (Forge.block RPC.Path.root)
+      (Forge.block RPC.Path.open_root)
       (fun _ctxt ((_net_id, level, proto_level, predecessor,
                    timestamp, fitness), command) ->
         let shell = { Block_header.level ; proto_level ; predecessor ;

tezos.opam

@@ -27,7 +27,6 @@ depends: [
   "ocp-ocamlres" { >= "dev" }
   "ocplib-endian"
   "ocplib-json-typed"
-  "ocplib-resto" { >= "dev" }
   "reactiveData"
   "sodium" { >= "0.3.0" }
   "magic-mime"
@@ -39,5 +38,5 @@ build: [
   [ "jbuilder" "build" "-p" name "-j" jobs ]
 ]
 build-test: [
-  [ "jbuilder" "runtest" ]
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
 ]

vendors/ocplib-resto/.gitignore

@@ -0,0 +1,6 @@
+
+*~
+_build
+
+.merlin
+*.install

vendors/ocplib-resto/.ocp-indent

@@ -0,0 +1 @@
+match_clause = 4

vendors/ocplib-resto/.travis.yml

@@ -0,0 +1,12 @@
+language: c
+sudo: false
+services:
+  - docker
+install: wget https://raw.githubusercontent.com/ocaml/ocaml-travisci-skeleton/master/.travis-docker.sh
+script: bash ./.travis-docker.sh
+env:
+  global:
+    - PACKAGE="ocplib-resto"
+  matrix:
+    - DISTRO=debian-stable OCAML_VERSION=4.03.0
+    - DISTRO=debian-stable OCAML_VERSION=4.02.3

vendors/ocplib-resto/CHANGES.md

@@ -0,0 +1,3 @@
+### 0.2 (2017-11-21)
+
+* Switch to jbuilder

vendors/ocplib-resto/LICENSE

@@ -0,0 +1,203 @@
+In the following, "ocplib-resto" refers to all files marked
+"Copyright OCamlPro" in this distribution.
+
+ocplib-resto is distributed under the terms of the
+GNU Lesser General Public License (LGPL) version 2.1 (included below).
+
+As a special exception to the GNU Lesser General Public License, you
+may link, statically or dynamically, a "work that uses ocplib-resto"
+with a publicly distributed version of ocplib-resto to produce an
+executable file containing portions of ocplib-resto, and distribute
+that executable file under terms of your choice, without any of the
+additional requirements listed in clause 6 of the GNU Lesser General
+Public License. By "a publicly distributed version of ocplib-resto",
+we mean either the unmodified ocplib-resto as distributed by OCamlPro,
+or a modified version of ocplib-resto that is distributed under the
+conditions defined in clause 2 of the GNU Lesser General Public
+License. This exception does not however invalidate any other reasons
+why the executable file might be covered by the GNU Lesser General
+Public License.
+
+----------------------------------------------------------------------
+
+GNU LESSER GENERAL PUBLIC LICENSE
+
+Version 2.1, February 1999
+
+Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+Preamble
+
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+
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+--------------------------------------------------

vendors/ocplib-resto/Makefile

@@ -0,0 +1,13 @@
+
+all:
+	jbuilder build --dev
+
+.PHONY: test
+test:
+	jbuilder runtest --dev
+
+doc-html:
+	jbuilder build @doc --dev
+
+clean:
+	jbuilder clean

vendors/ocplib-resto/README.md

@@ -0,0 +1,9 @@
+# ocplib-resto (WIP)
+
+This is a minimal OCaml library for type-safe HTTP/JSON RPCs.
+
+This is based on a notion of service, *à la* Eliom, and it uses
+`ocplib-json-typed` for self-documenting JSON encoders.
+
+See `test_ezresto-directory/ezResto_test.ml`
+or `test_resto-directory/resto_test.ml` for example.`

vendors/ocplib-resto/jbuild

@@ -0,0 +1 @@
+(jbuild_version 1)

vendors/ocplib-resto/lib_ezresto-directory/ezRestoDirectory.ml

@@ -0,0 +1,81 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Resto
+open Lwt.Infix
+
+open RestoDirectory
+module Directory = RestoDirectory.MakeDirectory(RestoJson.Encoding)
+open Directory
+
+module Answer = Answer
+
+type step = Directory.step =
+  | Static of string
+  | Dynamic of Arg.descr
+  | DynamicTail of Arg.descr
+
+type conflict = Directory.conflict =
+  | CService of meth | CDir | CBuilder | CTail
+  | CTypes of Arg.descr * Arg.descr
+  | CType of Arg.descr * string list
+
+exception Conflict = Directory.Conflict
+
+type directory = unit Directory.directory
+let empty = empty
+let prefix path dir = (prefix path (map (fun _ -> ()) dir))
+let merge = merge
+
+let register d s h = register d s h
+let register0 d s h = register0 d s h
+let register1 d s h = register1 d s h
+let register2 d s h = register2 d s h
+let register3 d s h = register3 d s h
+let register4 d s h = register4 d s h
+let register5 d s h = register5 d s h
+
+let register_dynamic_directory ?descr dir path builder =
+  register_dynamic_directory ?descr dir path
+    (fun p -> builder p >>= fun dir -> Lwt.return (map (fun _ -> ()) dir))
+
+let register_dynamic_directory1 ?descr root s f =
+  register_dynamic_directory ?descr root s Curry.(curry (S Z) f)
+let register_dynamic_directory2 ?descr root s f =
+  register_dynamic_directory ?descr root s Curry.(curry (S (S Z)) f)
+let register_dynamic_directory3 ?descr root s f =
+  register_dynamic_directory ?descr root s Curry.(curry (S (S (S Z))) f)
+
+let register_describe_directory_service =
+  register_describe_directory_service
+
+type 'input input = 'input Service.input =
+  | No_input : unit input
+  | Input : 'input Json_encoding.encoding -> 'input input
+
+type ('q, 'i, 'o, 'e) types = ('q, 'i, 'o, 'e) Directory.types = {
+  query : 'q Resto.Query.t ;
+  input : 'i Service.input ;
+  output : 'o Json_encoding.encoding ;
+  error : 'e Json_encoding.encoding ;
+}
+
+type registred_service = Directory.registred_service =
+  | Service :
+      { types : ('q, 'i, 'o, 'e) types ;
+        handler : ('q -> 'i -> ('o, 'e) Answer.t Lwt.t) ;
+      } -> registred_service
+
+type lookup_error = Directory.lookup_error
+
+let lookup directory args query =
+  Directory.lookup directory () args query
+let allowed_methods dir path = Directory.allowed_methods dir () path
+let transparent_lookup = Directory.transparent_lookup

vendors/ocplib-resto/lib_ezresto-directory/ezRestoDirectory.mli

@@ -0,0 +1,170 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open EzResto
+
+module Answer : sig
+
+  (** Return type for service handler *)
+  type ('o, 'e) t =
+    [ `Ok of 'o (* 200 *)
+    | `OkStream of 'o stream (* 200 *)
+    | `Created of string option (* 201 *)
+    | `No_content (* 204 *)
+    | `Unauthorized of 'e option (* 401 *)
+    | `Forbidden of 'e option (* 403 *)
+    | `Not_found of 'e option (* 404 *)
+    | `Conflict of 'e option (* 409 *)
+    | `Error of 'e option (* 500 *)
+    ]
+
+  and 'a stream = {
+    next: unit -> 'a option Lwt.t ;
+    shutdown: unit -> unit ;
+  }
+
+end
+
+(** Possible error while registring services. *)
+type step =
+  | Static of string
+  | Dynamic of Arg.descr
+  | DynamicTail of Arg.descr
+
+type conflict =
+  | CService of meth | CDir | CBuilder | CTail
+  | CTypes of Arg.descr * Arg.descr
+  | CType of Arg.descr * string list
+
+exception Conflict of step list * conflict
+
+(** Dispatch tree *)
+type directory
+
+(** Empty tree *)
+val empty: directory
+
+val prefix: 'a Path.t -> directory -> directory
+val merge: directory -> directory -> directory
+
+type 'input input =
+  | No_input : unit input
+  | Input : 'input Json_encoding.encoding -> 'input input
+
+type ('q, 'i, 'o, 'e) types = {
+  query : 'q Resto.Query.t ;
+  input : 'i input ;
+  output : 'o Json_encoding.encoding ;
+  error : 'e Json_encoding.encoding ;
+}
+
+type registred_service =
+  | Service :
+      { types : ('q, 'i, 'o, 'e) types ;
+        handler : ('q -> 'i -> ('o, 'e) Answer.t Lwt.t) ;
+      } -> registred_service
+
+type lookup_error =
+  [ `Not_found (* 404 *)
+  | `Method_not_allowed of meth list (* 405 *)
+  | `Cannot_parse_path of string list * Arg.descr * string (* 400 *)
+  ]
+
+(** Resolve a service. *)
+val lookup: directory -> meth -> string list -> (registred_service, [> lookup_error ]) result Lwt.t
+
+val allowed_methods:
+  directory -> string list ->
+  (meth list, [> lookup_error ]) result Lwt.t
+
+val transparent_lookup:
+  directory ->
+  ('meth, 'params, 'query, 'input, 'output, 'error) EzResto.service ->
+  'params -> 'query -> 'input -> [> ('output, 'error) Answer.t ] Lwt.t
+
+
+(** Registring handler in service tree. *)
+val register:
+  directory ->
+  ('meth, 'params, 'query, 'input, 'output, 'error) EzResto.service ->
+  ('params -> 'query -> 'input -> ('output, 'error) Answer.t Lwt.t) ->
+  directory
+
+(** Registring handler in service tree. Curryfied variant.  *)
+val register0:
+  directory ->
+  ('meth, unit, 'q, 'i, 'o, 'e) EzResto.service ->
+  ('q -> 'i -> ('o, 'e) Answer.t Lwt.t) ->
+  directory
+
+val register1:
+  directory ->
+  ('meth, unit * 'a, 'q, 'i, 'o, 'e) EzResto.service ->
+  ('a -> 'q -> 'i -> ('o, 'e) Answer.t Lwt.t) ->
+  directory
+
+val register2:
+  directory ->
+  ('meth, (unit * 'a) * 'b, 'q, 'i, 'o, 'e) EzResto.service ->
+  ('a -> 'b -> 'q -> 'i -> ('o, 'e) Answer.t Lwt.t) ->
+  directory
+
+val register3:
+  directory ->
+  ('meth, ((unit * 'a) * 'b) * 'c, 'q, 'i, 'o, 'e) EzResto.service ->
+  ('a -> 'b -> 'c -> 'q -> 'i -> ('o, 'e) Answer.t Lwt.t) ->
+  directory
+
+val register4:
+  directory ->
+  ('meth, (((unit * 'a) * 'b) * 'c) * 'd, 'q, 'i, 'o, 'e) EzResto.service ->
+  ('a -> 'b -> 'c -> 'd -> 'q -> 'i -> ('o, 'e) Answer.t Lwt.t) ->
+  directory
+
+val register5:
+  directory ->
+  ('meth, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q, 'i, 'o, 'e) EzResto.service ->
+  ('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> ('o, 'e) Answer.t Lwt.t) ->
+  directory
+
+(** Registring dynamic subtree. *)
+val register_dynamic_directory:
+  ?descr:string ->
+  directory ->
+  'params Path.t ->
+  ('params -> directory Lwt.t) ->
+  directory
+
+(** Registring dynamic subtree. (Curryfied variant) *)
+val register_dynamic_directory1:
+  ?descr:string ->
+  directory ->
+  (unit * 'a) Path.t ->
+  ('a -> directory Lwt.t) ->
+  directory
+
+val register_dynamic_directory2:
+  ?descr:string ->
+  directory ->
+  ((unit * 'a) * 'b) Path.t ->
+  ('a -> 'b -> directory Lwt.t) ->
+  directory
+
+val register_dynamic_directory3:
+  ?descr:string ->
+  directory ->
+  (((unit * 'a) * 'b) * 'c) Path.t ->
+  ('a -> 'b -> 'c -> directory Lwt.t) ->
+  directory
+
+(** Registring a description service. *)
+val register_describe_directory_service:
+  directory -> EzResto.description_service -> directory
+

vendors/ocplib-resto/lib_ezresto-directory/jbuild

@@ -0,0 +1,8 @@
+(jbuild_version 1)
+
+(library
+ ((name ezresto_directory)
+  (public_name ocplib-ezresto-directory)
+  (libraries (ocplib-ezresto ocplib-resto-directory))
+  (modules (EzRestoDirectory))
+  (wrapped false)))

vendors/ocplib-resto/lib_ezresto/ezResto.ml

@@ -0,0 +1,54 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+
+open Resto
+module Service = Resto.MakeService(RestoJson.Encoding)
+open Service
+
+type meth = [ `GET | `POST | `DELETE | `PUT | `PATCH ]
+module Arg = Arg
+module Path = struct
+  type 'params t = (unit, 'params) Path.path
+  type 'params path = (unit, 'params) Path.path
+  let root = Path.root
+  let add_suffix = Path.add_suffix
+  let add_arg = Path.add_arg
+  let (/) = add_suffix
+  let (/:) = add_arg
+  let map = Path.map
+end
+module Query = Query
+type ('meth, 'params, 'query, 'input, 'output, 'error) service =
+  ('meth, unit, 'params, 'query, 'input, 'output, 'error) Service.t
+let get_service = get_service
+let post_service = post_service
+let delete_service = delete_service
+let put_service = put_service
+let patch_service = patch_service
+type 'input input = 'input Service.input =
+  | No_input : unit input
+  | Input : 'input Json_encoding.encoding -> 'input input
+type 'input request = 'input Service.request = {
+  meth: meth ;
+  path: string list ;
+  query: (string * string) list ;
+  input: 'input input ;
+}
+let forge_request = forge_request
+let query = query
+let input_encoding = input_encoding
+let output_encoding = output_encoding
+let error_encoding = error_encoding
+module Description = Resto.Description
+type description_service =
+  ([`GET], unit * string list, Description.request,
+   unit, Json_schema.schema Description.directory, unit) service
+let description_service = description_service

vendors/ocplib-resto/lib_ezresto/ezResto.mli

@@ -0,0 +1,168 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+type meth = [ `GET | `POST | `DELETE | `PUT | `PATCH ]
+
+(** Typed path argument. *)
+module Arg : sig
+
+  type 'a t = 'a Resto.Arg.arg
+  type 'a arg = 'a t
+  val make:
+    ?descr:string ->
+    name:string ->
+    destruct:(string -> ('a, string) result) ->
+    construct:('a -> string) ->
+    unit -> 'a arg
+
+  type descr = Resto.Arg.descr = {
+    name: string ;
+    descr: string option ;
+  }
+  val descr: 'a arg -> descr
+
+  val int: int arg
+  val int32: int32 arg
+  val int64: int64 arg
+  val float: float arg
+
+end
+
+(** Parametrized path to services. *)
+module Path : sig
+
+  type 'params t = (unit, 'params) Resto.Path.path
+  type 'params path = 'params t
+
+  val root: unit path
+
+  val add_suffix: 'params path -> string -> 'params path
+  val (/): 'params path -> string -> 'params path
+
+  val add_arg: 'params path -> 'a Arg.arg -> ('params * 'a) path
+  val (/:): 'params path -> 'a Arg.arg -> ('params * 'a) path
+
+  val map: ('a -> 'b) -> ('b -> 'a) -> 'a path -> 'b path
+
+end
+
+module Query : sig
+
+  type 'a t
+  type 'a query = 'a t
+
+  val empty: unit query
+
+  type ('a, 'b) field
+  val field:
+    ?descr: string ->
+    string -> 'a Arg.t -> 'a -> ('b -> 'a) -> ('b, 'a) field
+
+  type ('a, 'b, 'c) open_query
+  val query: 'b -> ('a, 'b, 'b) open_query
+  val (|+):
+    ('a, 'b, 'c -> 'd) open_query ->
+    ('a, 'c) field -> ('a, 'b, 'd) open_query
+  val seal: ('a, 'b, 'a) open_query -> 'a t
+
+  type untyped = (string * string) list
+  exception Invalid of string
+  val parse: 'a query -> untyped -> 'a
+
+end
+
+(** Services. *)
+type ('meth, 'params, 'query, 'input, 'output, 'error) service =
+  ('meth, unit, 'params, 'query, 'input, 'output, 'error) Resto.MakeService(RestoJson.Encoding).service
+
+val get_service:
+  ?description: string ->
+  query: 'query Query.t ->
+  output: 'output Json_encoding.encoding ->
+  error: 'error Json_encoding.encoding ->
+  'params Path.t ->
+  ([ `GET ], 'params, 'query, unit, 'output, 'error) service
+
+val post_service:
+  ?description: string ->
+  query: 'query Query.t ->
+  input: 'input Json_encoding.encoding ->
+  output: 'output Json_encoding.encoding ->
+  error: 'error Json_encoding.encoding ->
+  'params Path.t ->
+  ([ `POST ], 'params, 'query, 'input, 'output, 'error) service
+
+val delete_service:
+  ?description: string ->
+  query: 'query Query.t ->
+  output: 'output Json_encoding.encoding ->
+  error: 'error Json_encoding.encoding ->
+  'params Path.t ->
+  ([ `DELETE ], 'params, 'query, unit, 'output, 'error) service
+
+
+val put_service:
+  ?description: string ->
+  query: 'query Query.t ->
+  input: 'input Json_encoding.encoding ->
+  output: 'output Json_encoding.encoding ->
+  error: 'error Json_encoding.encoding ->
+  'params Path.t ->
+  ([ `PUT ], 'params, 'query, 'input, 'output, 'error) service
+
+val patch_service:
+  ?description: string ->
+  query: 'query Query.t ->
+  input: 'input Json_encoding.encoding ->
+  output: 'output Json_encoding.encoding ->
+  error: 'error Json_encoding.encoding ->
+  'params Path.t ->
+  ([ `PATCH ], 'params, 'query, 'input, 'output, 'error) service
+
+type 'input input =
+  | No_input : unit input
+  | Input : 'input Json_encoding.encoding -> 'input input
+
+type 'input request = {
+  meth: meth ;
+  path: string list ;
+  query: (string * string) list ;
+  input: 'input input ;
+}
+
+val forge_request:
+  ('meth, 'params, 'query, 'input, 'output, 'error) service ->
+  'params -> 'query -> 'input request
+
+val query:
+  ('meth, 'params, 'query, 'input, 'output, 'error) service ->
+  'query Query.t
+
+val input_encoding:
+  ('meth, 'params, 'query, 'input, 'output, 'error) service ->
+  'input input
+
+val output_encoding:
+  ('meth, 'params, 'query, 'input, 'output, 'error) service ->
+  'output Json_encoding.encoding
+
+val error_encoding:
+  ('meth, 'params, 'query, 'input, 'output, 'error) service ->
+  'error Json_encoding.encoding
+
+module Description = Resto.Description
+
+type description_service =
+  ([`GET], unit * string list, Description.request,
+   unit, Json_schema.schema Description.directory, unit) service
+
+val description_service:
+  ?description:string -> unit Path.path -> description_service
+

vendors/ocplib-resto/lib_ezresto/jbuild

@@ -0,0 +1,8 @@
+(jbuild_version 1)
+
+(library
+ ((name ezresto)
+  (public_name ocplib-ezresto)
+  (libraries (ocplib-resto-json))
+  (modules (EzResto))
+  (wrapped false)))

vendors/ocplib-resto/lib_resto-cohttp/jbuild

@@ -0,0 +1,9 @@
+(jbuild_version 1)
+
+(library
+ ((name resto_cohttp)
+  (public_name ocplib-resto-cohttp)
+  (libraries (ocplib-resto-directory cohttp-lwt-unix))
+  (modules (RestoCohttp))
+  (wrapped false)))
+

vendors/ocplib-resto/lib_resto-cohttp/restoCohttp.ml

@@ -0,0 +1,444 @@
+(**************************************************************************)
+(*                                                                        *)
+(*    Copyright (c) 2014 - 2017.                                          *)
+(*    Dynamic Ledger Solutions, Inc. <contact@tezos.com>                  *)
+(*                                                                        *)
+(*    All rights reserved. No warranty, explicit or implicit, provided.   *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Lwt.Infix
+
+module Utils = struct
+
+  let split_path path =
+    let l = String.length path in
+    let rec do_slashes acc i =
+      if i >= l then
+        List.rev acc
+      else if String.get path i = '/' then
+        do_slashes acc (i + 1)
+      else
+        do_component acc i i
+    and do_component acc i j =
+      if j >= l then
+        if i = j then
+          List.rev acc
+        else
+          List.rev (String.sub path i (j - i) :: acc)
+      else if String.get path j = '/' then
+        do_slashes (String.sub path i (j - i) :: acc) j
+      else
+        do_component acc i (j + 1) in
+    do_slashes [] 0
+
+end
+
+type cors = {
+  allowed_headers : string list ;
+  allowed_origins : string list ;
+}
+
+module Cors = struct
+
+  let default = { allowed_headers = [] ; allowed_origins = [] }
+
+  let check_origin_matches origin allowed_origin =
+    String.equal "*" allowed_origin ||
+    String.equal allowed_origin origin ||
+    begin
+      let allowed_w_slash = allowed_origin ^ "/" in
+      let len_a_w_s = String.length allowed_w_slash in
+      let len_o = String.length origin in
+      (len_o >= len_a_w_s) &&
+      String.equal allowed_w_slash @@ String.sub origin 0 len_a_w_s
+    end
+
+  let find_matching_origin allowed_origins origin =
+    let matching_origins =
+      List.filter (check_origin_matches origin) allowed_origins in
+    let compare_by_length_neg a b =
+      ~- (compare (String.length a) (String.length b)) in
+    let matching_origins_sorted =
+      List.sort compare_by_length_neg matching_origins in
+    match matching_origins_sorted with
+    | [] -> None
+    | x :: _ -> Some x
+
+  let add_headers headers cors origin_header =
+    let cors_headers =
+      Cohttp.Header.add_multi headers
+        "Access-Control-Allow-Headers" cors.allowed_headers in
+    match origin_header with
+    | None -> cors_headers
+    | Some origin ->
+        match find_matching_origin cors.allowed_origins origin with
+        | None -> cors_headers
+        | Some allowed_origin ->
+            Cohttp.Header.add_multi cors_headers
+              "Access-Control-Allow-Origin" [allowed_origin]
+
+end
+
+module ConnectionMap = Map.Make(Cohttp.Connection)
+
+module type LOGGING = sig
+
+  val debug: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val log_info: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val log_notice: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val warn: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val log_error: ('a, Format.formatter, unit, unit) format4 -> 'a
+
+  val lwt_debug: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_log_info: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_log_notice: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_warn: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_log_error: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+
+end
+
+module Make (Encoding : Resto.ENCODING)(Log : LOGGING) = struct
+
+  open Log
+  open Cohttp
+
+  module Service = Resto.MakeService(Encoding)
+  module Directory = RestoDirectory.MakeDirectory(Encoding)
+
+  type media_type = {
+    name: string ;
+    construct: 'a. 'a Encoding.t -> 'a -> string ;
+    destruct: 'a. 'a Encoding.t -> string -> ('a, string) result ;
+  }
+
+  module Media_type = struct
+
+    (* Inspired from ocaml-webmachine *)
+
+    let media_match (_, (range, _)) media =
+      let type_, subtype =
+        match Utils.split_path media.name with
+        | [x ; y] -> x, y
+        | _      ->
+            Format.kasprintf invalid_arg "invalid media_type '%s'" media.name in
+      let open Accept in
+      match range with
+      | AnyMedia                     -> true
+      | AnyMediaSubtype type_'       -> type_' = type_
+      | MediaType (type_', subtype') -> type_' = type_ && subtype' = subtype
+
+    let match_header provided header =
+      let ranges = Accept.(media_ranges header |> qsort) in
+      let rec loop = function
+        | [] -> None
+        | r :: rs ->
+            try Some(List.find (media_match r) provided)
+            with Not_found -> loop rs
+      in
+      loop ranges
+
+  end
+
+  type server = {
+    root : unit Directory.directory ;
+    mutable streams : (unit -> unit) ConnectionMap.t ;
+    cors : cors ;
+    media_types : media_type list ;
+    default_media_type : media_type ;
+    stopper : unit Lwt.u ;
+    mutable worker : unit Lwt.t ;
+  }
+
+  let create_stream server con to_string s =
+    let running = ref true in
+    let stream =
+      Lwt_stream.from
+        (fun () ->
+           if not !running then
+             Lwt.return None
+           else
+             s.RestoDirectory.Answer.next () >|= function
+             | None -> None
+             | Some x -> Some (to_string x)) in
+    let shutdown () =
+      running := false ;
+      s.shutdown () ;
+      server.streams <- ConnectionMap.remove con server.streams in
+    server.streams <- ConnectionMap.add con shutdown server.streams ;
+    stream
+
+  let (>>=?) m f =
+    m >>= function
+    | Ok x -> f x
+    | Error err -> Lwt.return_error err
+
+  let callback server (_io, con) req body =
+    (* FIXME: check inbound adress *)
+    let uri = Request.uri req in
+    lwt_log_info "(%s) receive request to %s"
+      (Connection.to_string con) (Uri.path uri) >>= fun () ->
+    let path = Utils.split_path (Uri.path uri) in
+    let req_headers = Request.headers req in
+    begin
+      match Request.meth req with
+      | #Resto.meth as meth -> begin
+          Directory.lookup server.root ()
+            meth path >>=? fun (Directory.Service s) ->
+          begin
+            match Header.get req_headers "content-type" with
+            | None -> Lwt.return_ok server.default_media_type
+            | Some content_type ->
+                match List.find (fun { name ; _ } -> name = content_type)
+                        server.media_types with
+                | exception Not_found ->
+                    Lwt.return_error (`Unsupported_media_type content_type)
+                | media_type -> Lwt.return_ok media_type
+          end >>=? fun input_media_type ->
+          begin
+            match Header.get req_headers "accept" with
+            | None -> Lwt.return_ok server.default_media_type
+            | Some accepted ->
+                match Media_type.match_header
+                        server.media_types (Some accepted) with
+                | None -> Lwt.return_error `Not_acceptable
+                | Some media_type -> Lwt.return_ok media_type
+          end >>=? fun output_media_type ->
+          begin
+            match Resto.Query.parse s.types.query
+                    (List.map
+                       (fun (k, l) -> (k, String.concat "," l))
+                       (Uri.query uri)) with
+            | exception (Resto.Query.Invalid s) ->
+                Lwt.return_error (`Cannot_parse_query s)
+            | query -> Lwt.return_ok query
+          end >>=? fun query ->
+          let output = output_media_type.construct s.types.output
+          and error = function
+            | None -> Cohttp_lwt_body.empty, Transfer.Fixed 0L
+            | Some e ->
+                let s = output_media_type.construct s.types.error e in
+                Cohttp_lwt_body.of_string s,
+                Transfer.Fixed (Int64.of_int (String.length s)) in
+          let headers = Header.init () in
+          let headers =
+            Header.add headers "content-type" output_media_type.name in
+          begin
+            match s.types.input with
+            | Service.No_input ->
+                s.handler query () >>= Lwt.return_ok
+            | Service.Input input ->
+                Cohttp_lwt_body.to_string body >>= fun body ->
+                match
+                  input_media_type.destruct input body
+                with
+                | Error s ->
+                    Lwt.return_error (`Cannot_parse_body s)
+                | Ok body ->
+                    s.handler query body >>= Lwt.return_ok
+          end >>=? function
+          | `Ok o ->
+              let body = output o in
+              let encoding =
+                Transfer.Fixed (Int64.of_int (String.length body)) in
+              Lwt.return_ok
+                (Response.make ~status:`OK ~encoding ~headers (),
+                 Cohttp_lwt_body.of_string body)
+          | `OkStream o ->
+              let body = create_stream server con output o in
+              let encoding = Transfer.Chunked in
+              Lwt.return_ok
+                (Response.make ~status:`OK ~encoding ~headers (),
+                 Cohttp_lwt_body.of_stream body)
+          | `Created s ->
+              let headers = Header.init () in
+              let headers =
+                match s with
+                | None -> headers
+                | Some s -> Header.add headers "location" s in
+              Lwt.return_ok
+                (Response.make ~status:`Created  ~headers (),
+                 Cohttp_lwt_body.empty)
+          | `No_content ->
+              Lwt.return_ok
+                (Response.make ~status:`No_content (),
+                 Cohttp_lwt_body.empty)
+          | `Unauthorized e ->
+              let body, encoding = error e in
+              let status = `Unauthorized in
+              Lwt.return_ok
+                (Response.make ~status ~encoding ~headers (), body)
+          | `Forbidden e ->
+              let body, encoding = error e in
+              let status = `Forbidden in
+              Lwt.return_ok
+                (Response.make ~status ~encoding ~headers (), body)
+          | `Not_found e ->
+              let body, encoding = error e in
+              let status = `Not_found in
+              Lwt.return_ok
+                (Response.make ~status ~encoding ~headers (), body)
+          | `Conflict e ->
+              let body, encoding = error e in
+              let status = `Conflict in
+              Lwt.return_ok
+                (Response.make ~status ~encoding ~headers (), body)
+          | `Error e ->
+              let body, encoding = error e in
+              let status = `Internal_server_error in
+              Lwt.return_ok
+                (Response.make ~status ~encoding ~headers (), body)
+        end
+      | `HEAD ->
+          (* TODO ??? *)
+          Lwt.return_error `Not_implemented
+      | `OPTIONS ->
+          let req_headers = Request.headers req in
+          let origin_header = Header.get req_headers "origin" in
+          begin
+            (* Default OPTIONS handler for CORS preflight *)
+            if origin_header = None then
+              Directory.allowed_methods server.root () path
+            else
+              match Header.get req_headers
+                      "Access-Control-Request-Method" with
+              | None ->
+                  Directory.allowed_methods server.root () path
+              | Some meth ->
+                  match Code.method_of_string meth with
+                  | #Resto.meth as meth ->
+                      Directory.lookup server.root () meth path >>=? fun _handler ->
+                      Lwt.return_ok [ meth ]
+                  | _ ->
+                      Lwt.return_error `Not_found
+          end >>=? fun cors_allowed_meths ->
+          lwt_log_info "(%s) RPC preflight"
+            (Connection.to_string con) >>= fun () ->
+          let headers = Header.init () in
+          let headers =
+            Header.add_multi headers
+              "Access-Control-Allow-Methods"
+              (List.map Resto.string_of_meth cors_allowed_meths) in
+          let headers = Cors.add_headers headers server.cors origin_header in
+          Lwt.return_ok
+            (Response.make ~flush:true ~status:`OK ~headers (),
+             Cohttp_lwt_body.empty)
+      | _ ->
+          Lwt.return_error `Not_implemented
+    end >>= function
+    | Ok answer -> Lwt.return answer
+    | Error `Not_implemented ->
+        Lwt.return
+          (Response.make ~status:`Not_implemented (),
+           Cohttp_lwt_body.empty)
+    | Error `Method_not_allowed methods ->
+        let headers = Header.init () in
+        let headers =
+          Header.add_multi headers "allow"
+            (List.map Resto.string_of_meth methods) in
+        Lwt.return
+          (Response.make ~status:`Method_not_allowed ~headers (),
+           Cohttp_lwt_body.empty)
+    | Error `Cannot_parse_path (context, arg, value) ->
+        let headers = Header.init () in
+        let headers =
+          Header.add headers "content-type" "text/plain" in
+        Lwt.return
+          (Response.make ~status:`Bad_request ~headers (),
+           Format.kasprintf Cohttp_lwt_body.of_string
+             "Failed to parsed an argument in path. After \"%s\", \
+              the value \"%s\" is not acceptable for type \"%s\""
+             (String.concat "/" context) value arg.name)
+    | Error `Cannot_parse_body s ->
+        let headers = Header.init () in
+        let headers =
+          Header.add headers "content-type" "text/plain" in
+        Lwt.return
+          (Response.make ~status:`Bad_request ~headers (),
+           Format.kasprintf Cohttp_lwt_body.of_string
+             "Failed to parse the request body: %s" s)
+    | Error `Cannot_parse_query s ->
+        let headers = Header.init () in
+        let headers =
+          Header.add headers "content-type" "text/plain" in
+        Lwt.return
+          (Response.make ~status:`Bad_request ~headers (),
+           Format.kasprintf Cohttp_lwt_body.of_string
+             "Failed to parse the query string: %s" s)
+    | Error `Not_acceptable ->
+        let accepted_encoding =
+          String.concat ", "
+            (List.map (fun f -> f.name)
+               server.media_types) in
+        Lwt.return
+          (Response.make ~status:`Not_acceptable (),
+           Cohttp_lwt_body.of_string accepted_encoding)
+    | Error `Unsupported_media_type _ ->
+        Lwt.return
+          (Response.make ~status:`Unsupported_media_type (),
+           Cohttp_lwt_body.empty)
+    | Error `Not_found ->
+        Lwt.return
+          (Response.make ~status:`Not_found (),
+           Cohttp_lwt_body.empty)
+
+  (* Promise a running RPC server. *)
+
+  let launch
+      ?(host="::")
+      ?(cors = Cors.default)
+      ~media_types
+      mode root =
+    if media_types = [] then
+      invalid_arg "RestoCohttp.launch(empty media type list)" ;
+    let default_media_type = List.hd media_types in
+    let stop, stopper = Lwt.wait () in
+    let server = {
+      root ;
+      streams = ConnectionMap.empty ;
+      cors ;
+      media_types ;
+      default_media_type ;
+      stopper ;
+      worker = Lwt.return_unit ;
+    } in
+    let open Cohttp_lwt_unix in
+    Conduit_lwt_unix.init ~src:host () >>= fun ctx ->
+    let ctx = Cohttp_lwt_unix_net.init ~ctx () in
+    server.worker <- begin
+      let conn_closed (_, con) =
+        log_info "connection closed %s" (Connection.to_string con) ;
+        try ConnectionMap.find con server.streams ()
+        with Not_found -> ()
+      and on_exn = function
+        | Unix.Unix_error (Unix.EADDRINUSE, "bind", _) ->
+            log_error "RPC server port already taken, \
+                       the node will be shutdown" ;
+            exit 1
+        | Unix.Unix_error (ECONNRESET, _, _)
+        | Unix.Unix_error (EPIPE, _, _)  -> ()
+        | exn -> !Lwt.async_exception_hook exn
+      and callback (io, con) req body =
+        Lwt.catch
+          begin fun () -> callback server (io, con) req body end
+          begin fun exn ->
+            let headers = Header.init () in
+            let headers =
+              Header.add headers "content-type" "text/ocaml.exception" in
+            let status = `Internal_server_error in
+            let body = Cohttp_lwt_body.of_string (Printexc.to_string exn) in
+            Lwt.return (Response.make ~status ~headers (), body)
+          end
+      in
+      Server.create ~stop ~ctx ~mode ~on_exn
+        (Server.make ~callback ~conn_closed ())
+    end ;
+    Lwt.return server
+
+  let shutdown server =
+    Lwt.wakeup_later server.stopper () ;
+    server.worker >>= fun () ->
+    ConnectionMap.iter (fun _ f -> f ()) server.streams ;
+    Lwt.return_unit
+
+end

vendors/ocplib-resto/lib_resto-cohttp/restoCohttp.mli

@@ -0,0 +1,57 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+(** Typed RPC services: server implementation. *)
+
+type cors = {
+  allowed_headers : string list ;
+  allowed_origins : string list ;
+}
+
+module type LOGGING = sig
+
+  val debug: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val log_info: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val log_notice: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val warn: ('a, Format.formatter, unit, unit) format4 -> 'a
+  val log_error: ('a, Format.formatter, unit, unit) format4 -> 'a
+
+  val lwt_debug: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_log_info: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_log_notice: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_warn: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+  val lwt_log_error: ('a, Format.formatter, unit, unit Lwt.t) format4 -> 'a
+
+end
+
+module Make (Encoding : Resto.ENCODING) (Log : LOGGING) : sig
+
+  type media_type = {
+    name: string ;
+    construct: 'a. 'a Encoding.t -> 'a -> string ;
+    destruct: 'a. 'a Encoding.t -> string -> ('a, string) result ;
+  }
+
+  (** A handle on the server worker. *)
+  type server
+
+  (** Promise a running RPC server.*)
+  val launch :
+    ?host:string ->
+    ?cors:cors ->
+    media_types:media_type list ->
+    Conduit_lwt_unix.server ->
+    unit RestoDirectory.MakeDirectory(Encoding).t ->
+    server Lwt.t
+
+  (** Kill an RPC server. *)
+  val shutdown : server -> unit Lwt.t
+
+end

vendors/ocplib-resto/lib_resto-directory/jbuild

@@ -0,0 +1,9 @@
+(jbuild_version 1)
+
+(library
+ ((name resto_directory)
+  (public_name ocplib-resto-directory)
+  (libraries (lwt ocplib-resto))
+  (modules (RestoDirectory))
+  (wrapped false)))
+

vendors/ocplib-resto/lib_resto-directory/restoDirectory.ml

@@ -0,0 +1,744 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Resto
+
+let map_option f = function
+  | None -> None
+  | Some x -> Some (f x)
+
+let (>>=) = Lwt.bind
+let (>|=) = Lwt.(>|=)
+
+module Answer = struct
+
+  (** Return type for service handler *)
+  type ('o, 'e) t =
+    [ `Ok of 'o (* 200 *)
+    | `OkStream of 'o stream (* 200 *)
+    | `Created of string option (* 201 *)
+    | `No_content (* 204 *)
+    | `Unauthorized of 'e option (* 401 *)
+    | `Forbidden of 'e option (* 403 *)
+    | `Not_found of 'e option (* 404 *)
+    | `Conflict of 'e option (* 409 *)
+    | `Error of 'e option (* 500 *)
+    ]
+
+  and 'a stream = {
+    next: unit -> 'a option Lwt.t ;
+    shutdown: unit -> unit ;
+  }
+
+  let return x = Lwt.return (`Ok x)
+  let return_stream x = Lwt.return (`OkStream x)
+
+end
+
+module MakeDirectory (Encoding : ENCODING) = struct
+
+  module Service = Resto.MakeService(Encoding)
+
+  module Curry = struct
+
+    type (_,_,_,_,_,_) conv =
+      | Z : (unit, 'g, 'g, unit, 'f, 'f) conv
+      | S : ('t, 'g, 'b * 's, 'rt, 'f, 'r) conv ->
+        ('t * 'b, 'g, 's, 'a * 'rt, 'a -> 'f, 'r) conv
+    let reverse
+      : type a c d e f. (a, c, unit, d, e, f) conv -> a -> c
+      = fun c v ->
+        let rec reverse
+          : type a c d e f g. (a, c, d, e, f, g) conv -> a -> d -> c
+          = fun c v acc ->
+            match c, v with
+            | Z, _ -> acc
+            | S c, (v, x) -> reverse c v (x, acc) in
+        reverse c v ()
+    let rec curry
+      : type a b c d e f. (a, b, c, d, e, f) conv -> e -> d -> f
+      = fun c f ->
+        match c with
+        | Z -> fun () -> f
+        | S c -> (fun (v, x) -> curry c (f v) x)
+    let curry c f =
+      let f = curry c f in
+      fun x -> f (reverse c x)
+
+  end
+
+  type step =
+    | Static of string
+    | Dynamic of Arg.descr
+    | DynamicTail of Arg.descr
+
+  type conflict =
+    | CService of meth
+    | CDir
+    | CBuilder
+    | CTail
+    | CTypes of Arg.descr * Arg.descr
+    | CType of Arg.descr * string list
+
+  exception Conflict of step list * conflict
+
+  open Resto.Internal
+
+  type lookup_error =
+    [ `Not_found (* 404 *)
+    | `Method_not_allowed of meth list (* 405 *)
+    | `Cannot_parse_path of string list * Arg.descr * string (* 400 *)
+    ]
+
+  type ('query, 'input, 'output, 'error) types
+    = ('query, 'input, 'output, 'error) Service.Internal.types
+    = {
+      query : 'query Resto.Query.t ;
+      input : 'input Service.input ;
+      output : 'output Encoding.t ;
+      error : 'error Encoding.t ;
+    }
+
+  type 'key t =
+    | Empty : 'key t
+    | Static : 'key static_directory -> 'key t
+    | Dynamic : string option * ('key -> 'key directory Lwt.t) -> 'key t
+    | DynamicTail : 'a arg * ('key * 'a list) t -> 'key t
+
+  and 'key directory = 'key t
+  and 'key static_directory = {
+    services : 'key registred_service_builder MethMap.t ;
+    subdirs : 'key static_subdirectories option
+  }
+
+  and _ static_subdirectories =
+    | Suffixes: 'key directory StringMap.t -> 'key static_subdirectories
+    | Arg: 'a Resto.Internal.arg * ('key * 'a) directory -> 'key static_subdirectories
+
+  and registred_service =
+    | Service :
+        { types : ('q, 'i, 'o, 'e) types ;
+          handler : ('q -> 'i -> ('o, 'e) Answer.t Lwt.t) ;
+        } -> registred_service
+
+  and 'key registred_service_builder = {
+    meth : Resto.meth ;
+    description : Encoding.schema Description.service ;
+    builder : 'key -> registred_service ;
+  }
+
+  let empty = Empty
+
+  let rec map_directory
+    : type a b.
+      (a -> b) -> b directory -> a directory
+    = fun f t ->
+      match t with
+      | Empty -> Empty
+      | Dynamic (descr, builder) ->
+          let builder a = builder (f a) >|= map_directory f in
+          Dynamic (descr, builder)
+      | DynamicTail (arg, dir) ->
+          DynamicTail (arg, map_directory (fun (x, l) -> (f x, l)) dir)
+      | Static dir ->
+          Static (map_static_directory f dir)
+
+  and map_static_directory
+    : type a b.
+      (a -> b) -> b static_directory -> a static_directory
+    = fun f t ->
+      { services = MethMap.map (map_registred_service f) t.services ;
+        subdirs = map_option (map_static_subdirectories f) t.subdirs ;
+      }
+
+  and map_static_subdirectories
+    : type a b.
+      (a -> b) -> b static_subdirectories -> a static_subdirectories
+    = fun f t ->
+      match t with
+      | Suffixes map ->
+          Suffixes (StringMap.map (map_directory f) map)
+      | Arg (arg, dir) ->
+          let dir = map_directory (fun (a, x) -> f a, x) dir in
+          Arg (arg, dir)
+
+  and map_registred_service
+    : type a b.
+      (a -> b) -> b registred_service_builder -> a registred_service_builder
+    = fun f rs ->
+      { rs with builder = (fun p -> rs.builder (f p)) }
+
+  let map = map_directory
+
+  let prefix
+    : type p pr. (pr, p) Path.path -> p directory -> pr directory
+    = fun path dir ->
+      let rec prefix
+        : type k pr. (pr, k) Resto.Internal.rpath -> k directory -> pr directory
+        = fun path dir ->
+          match path with
+          | Root -> dir
+          | Static (path, name) ->
+              let subdirs = Suffixes (StringMap.singleton name dir) in
+              prefix path (Static { subdirs = Some subdirs ;
+                                    services = MethMap.empty })
+          | Dynamic (path, arg) ->
+              let subdirs = Arg (arg, dir) in
+              prefix path (Static { subdirs = Some subdirs ;
+                                    services = MethMap.empty })
+          | DynamicTail _ ->
+              invalid_arg "RestoDirectory.prefix" in
+      match Resto.Internal.to_path path with
+      | Path path -> prefix path dir
+      | MappedPath (path, map, _) -> prefix path (map_directory map dir)
+
+  let conflict steps kind = raise (Conflict (steps, kind))
+
+  let rec merge
+    : type p.
+      step list -> p directory -> p directory -> p directory
+    = fun path t1 t2 ->
+      match t1, t2 with
+      | Empty, t -> t
+      | t, Empty -> t
+      | Static n1, Static n2 ->
+          Static (merge_static_directory path n1 n2)
+      | Dynamic _, _
+      | _, Dynamic _ -> conflict path CBuilder
+      | DynamicTail _, _
+      | _, DynamicTail _ -> conflict path CTail
+
+  and merge_static_directory
+    : type p.
+      step list -> p static_directory -> p static_directory -> p static_directory
+    = fun path t1 t2 ->
+      let subdirs =
+        match t1.subdirs, t2.subdirs with
+        | None, None -> None
+        | None, Some dir | Some dir, None -> Some dir
+        | Some d1, Some d2 ->
+            match d1, d2 with
+            | Suffixes m1, Suffixes m2 ->
+                let merge =
+                  StringMap.fold
+                    (fun n t m ->
+                       let st =
+                         try StringMap.find n m with Not_found -> empty in
+                       StringMap.add n (merge (Static n :: path) st t) m) in
+                Some (Suffixes (merge m1 m2))
+            | Arg (arg1, subt1), Arg (arg2, subt2) ->
+                begin
+                  try let Ty.Eq = Ty.eq arg1.id arg2.id in
+                    let subt = merge (Dynamic arg1.descr :: path) subt1 subt2 in
+                    Some (Arg (arg1, subt))
+                  with Ty.Not_equal ->
+                    conflict path (CTypes (arg1.descr, arg2.descr))
+                end
+            | Arg (arg, _), Suffixes m ->
+                conflict path
+                  (CType (arg.descr, List.map fst (StringMap.bindings m)))
+            | Suffixes m, Arg (arg, _) ->
+                conflict path
+                  (CType (arg.descr, List.map fst (StringMap.bindings m))) in
+      let services =
+        MethMap.fold
+          begin fun meth s map ->
+            if MethMap.mem meth map then
+              conflict path (CService meth)
+            else
+              MethMap.add meth s map
+          end
+          t1.services t2.services in
+      { subdirs ; services }
+
+  let merge x y = merge [] x y
+
+  let rec describe_directory
+    : type a. recurse:bool -> ?arg:a ->
+    a directory -> Encoding.schema Description.directory Lwt.t
+    = fun ~recurse ?arg dir ->
+      match dir with
+      | Empty -> Lwt.return Description.Empty
+      | Dynamic (descr, builder) -> begin
+          match arg with
+          | None ->
+              Lwt.return (Dynamic descr : Encoding.schema Description.directory)
+          | Some arg ->
+              builder arg >>= fun dir -> describe_directory ~recurse dir
+        end
+      | DynamicTail ( _, dir) -> describe_directory ~recurse dir
+      | Static dir ->
+          describe_static_directory recurse arg dir >>= fun dir ->
+          Lwt.return (Static dir : Encoding.schema Description.directory)
+
+  and describe_static_directory
+    : type a.
+      bool -> a option -> a static_directory ->
+      Encoding.schema Description.static_directory Lwt.t
+    = fun recurse arg dir ->
+      let services = MethMap.map describe_service dir.services in
+      begin
+        if recurse then
+          match dir.subdirs with
+          | None -> Lwt.return_none
+          | Some subdirs ->
+              describe_static_subdirectories arg subdirs >>= fun dirs ->
+              Lwt.return (Some dirs)
+        else
+          Lwt.return_none
+      end >>= fun subdirs ->
+      Lwt.return ({ services ; subdirs } : Encoding.schema Description.static_directory)
+
+  and describe_static_subdirectories
+    : type a.
+      a option -> a static_subdirectories ->
+      Encoding.schema Description.static_subdirectories Lwt.t
+    = fun arg dir ->
+      match dir with
+      | Suffixes map ->
+          StringMap.fold (fun key dir map ->
+              map >>= fun map ->
+              describe_directory ~recurse:true ?arg dir >>= fun dir ->
+              Lwt.return (StringMap.add key dir map))
+            map (Lwt.return StringMap.empty) >>= fun map ->
+          Lwt.return (Suffixes map : Encoding.schema Description.static_subdirectories)
+      | Arg (arg, dir) ->
+          describe_directory ~recurse:true dir >>= fun dir ->
+          Lwt.return (Arg (arg.descr, dir)
+                      : Encoding.schema Description.static_subdirectories)
+
+  and describe_service
+    : type a.
+      a registred_service_builder -> Encoding.schema Description.service
+    = fun { description ; _ } -> description
+
+  and describe_query
+    : type a.
+      a Resto.Internal.query -> Description.query_item list
+    = fun (Fields (fields, _)) ->
+      let rec loop : type a b. (a, b) query_fields -> _ = function
+        | F0 -> []
+        | F1 (f, fs) ->
+            { Description.name = f.fname ;
+              description = f.fdescription } :: loop fs in
+      loop fields
+
+
+  (****************************************************************************
+   * Lookup
+   ****************************************************************************)
+
+  type resolved_directory =
+      Dir: 'a static_directory * 'a -> resolved_directory
+
+  let rec resolve
+    : type a.
+      string list -> a directory -> a -> string list ->
+      (resolved_directory, _) result Lwt.t
+    = fun prefix dir args path ->
+      match path, dir with
+      | _, Empty -> Lwt.return_error `Not_found
+      | path, Dynamic (_, builder) ->
+          builder args >>= fun dir -> resolve prefix dir args path
+      | path, DynamicTail (arg, dir) -> begin
+          match
+            List.fold_right
+              (fun e acc ->
+                 match acc with
+                 | Error _ as err -> err
+                 | Ok (prefix, path) ->
+                     match arg.destruct e with
+                     | Ok s -> Ok (e :: prefix, s :: path)
+                     | Error msg ->
+                         Error (`Cannot_parse_path (List.rev (e :: prefix), arg.descr, msg)))
+
+              path (Ok (prefix, []))
+          with
+          | Ok (prefix, path) -> resolve prefix dir (args, path) []
+          | Error _ as err -> Lwt.return err
+        end
+      | [], Static sdir -> Lwt.return_ok (Dir (sdir, args))
+      | _name :: _path, Static { subdirs = None ; _ } ->
+          Lwt.return_error `Not_found
+      | name :: path,
+        Static { subdirs = Some (Suffixes static) ; _ } -> begin
+          match StringMap.find name static with
+          | exception Not_found -> Lwt.return_error `Not_found
+          | dir -> resolve (name :: prefix) dir args path
+        end
+      | name :: path, Static { subdirs = Some (Arg (arg, dir)) ; _ } ->
+          match arg.destruct name with
+          | Ok x -> resolve (name :: prefix) dir (args, x) path
+          | Error msg ->
+              Lwt.return_error @@
+              `Cannot_parse_path (List.rev (name :: prefix), arg.descr, msg)
+
+  let lookup
+    : type a.
+      a directory -> a -> meth -> string list ->
+      (registred_service, lookup_error) result Lwt.t
+    = fun dir args meth path ->
+      resolve [] dir args path >>= function
+      | Error _ as err -> Lwt.return err
+      | Ok (Dir (dir, args)) -> begin
+          match MethMap.find meth dir.services with
+          | exception Not_found -> begin
+              match MethMap.bindings dir.services with
+              | [] -> Lwt.return_error `Not_found
+              | l -> Lwt.return_error (`Method_not_allowed (List.map fst l))
+            end
+          | rs -> Lwt.return_ok (rs.builder args)
+        end
+
+  let lookup =
+    (lookup
+     : _ -> _ -> _ -> _ -> (_, lookup_error) result Lwt.t
+     :> _ -> _ -> _ -> _ -> (_, [> lookup_error ]) result Lwt.t )
+
+  let allowed_methods
+    : type a.
+      a directory -> a -> string list ->
+      (Resto.meth list, lookup_error) result Lwt.t
+    = fun dir args path ->
+      resolve [] dir args path >>= function
+      | Error err -> Lwt.return_error err
+      | Ok (Dir (dir, _)) -> begin
+          match MethMap.bindings dir.services with
+          | [] -> Lwt.return_error `Not_found
+          | l -> Lwt.return_ok (List.map fst l)
+        end
+
+  let allowed_methods =
+    (allowed_methods
+     : _ -> _ -> _ -> (_, lookup_error) result Lwt.t
+     :> _ -> _ -> _ -> (_, [> lookup_error]) result Lwt.t)
+
+
+  let rec build_dynamic_dir : type p. p directory -> p -> p directory Lwt.t =
+    fun dir args ->
+      match dir with
+      | Dynamic (_, builder) ->
+          builder args >>= fun dir -> build_dynamic_dir dir args
+      | _ -> Lwt.return dir
+
+  let rec transparent_resolve
+    : type pr p.
+      pr directory -> (pr, p) rpath -> p -> p directory option Lwt.t
+    = fun dir path rargs ->
+      match path with
+      | Root -> Lwt.return_some dir
+      | Static (path, name) -> begin
+          transparent_resolve dir path rargs >>= function
+          | None -> Lwt.return_none
+          | Some dir ->
+              build_dynamic_dir dir rargs >>= function
+              | Dynamic (_,_) -> assert false (* should not happen. *)
+              | Static { subdirs = Some (Suffixes s) ; _ } ->
+                  Lwt.return_some (StringMap.find name s)
+              | Empty -> Lwt.return_none
+              | Static _ -> Lwt.return_none
+              | DynamicTail _ -> Lwt.return_none
+        end
+      | Dynamic (ipath, iarg) -> begin
+          transparent_resolve dir ipath (fst rargs) >>= function
+          | None -> Lwt.return_none
+          | Some dir ->
+              build_dynamic_dir dir (fst rargs) >>= function
+              | Dynamic (_, _) -> assert false (* should not happen. *)
+              | Static { subdirs = Some (Arg (arg, dir)) ; _ } -> begin
+                  match Ty.eq iarg.id arg.id with
+                  | exception Ty.Not_equal ->
+                      Lwt.return_none
+                  | Ty.Eq ->
+                      Lwt.return_some (dir : (_ * _) directory :> p directory)
+                end
+              | Empty -> Lwt.return_none
+              | Static _ -> Lwt.return_none
+              | DynamicTail _ -> Lwt.return_none
+        end
+      | DynamicTail (path, arg) -> begin
+          transparent_resolve dir path (fst rargs) >>= function
+          | None -> Lwt.return_none
+          | Some dir ->
+              build_dynamic_dir dir (fst rargs) >>= function
+              | Dynamic (_,_) -> assert false (* should not happen. *)
+              | DynamicTail (iarg, dir) -> begin
+                  match Ty.eq iarg.id arg.id with
+                  | exception Ty.Not_equal ->
+                      Lwt.return_none
+                  | Ty.Eq ->
+                      Lwt.return_some (dir : (_ * _) directory :> p directory)
+                end
+              | Empty -> Lwt.return_none
+              | Static _ -> Lwt.return_none
+        end
+
+  let transparent_lookup :
+    type prefix params query input output error.
+    prefix directory ->
+    (_, prefix, params, query, input, output, error) Service.t ->
+    params -> query -> input -> (output, error) Answer.t Lwt.t =
+    fun dir service params query body ->
+      let service = Service.Internal.to_service service in
+      begin
+        match service.path with
+        | Service.Internal.Path p ->
+            transparent_resolve dir p params
+        | Service.Internal.MappedPath (p, _, f) -> begin
+            transparent_resolve dir p (f params) >>= function
+            | None -> Lwt.return_none
+            | Some dir -> Lwt.return_some (map f dir)
+          end
+      end >>= function
+      | None -> Lwt.return (`Not_found None)
+      | Some (Static { services ; _ }) -> begin
+          try
+            let Service { handler ; types } =
+              (MethMap.find service.meth services).builder params in
+            match Service.Internal.eq types service.types with
+            | exception Service.Internal.Not_equal ->
+                Lwt.return (`Not_found None)
+            | Service.Internal.Eq ->
+                (handler query body
+                 : (_, _) Answer.t Lwt.t :> (output, error) Answer.t Lwt.t)
+          with Not_found -> Lwt.return (`Not_found None)
+        end
+      | Some _ -> Lwt.return (`Not_found None)
+
+  let transparent_lookup =
+    ( transparent_lookup
+      : _ -> (Resto.meth, _, _, _, _, _, _) Service.t ->
+      _ -> _ -> _ -> (_, _) Answer.t Lwt.t
+      :> _ -> ([< Resto.meth ], _, _, _, _, _, _) Service.t ->
+      _ -> _ -> _ -> [> (_, _) Answer.t ] Lwt.t)
+
+  let rec describe_rpath
+    : type a b. Description.path_item list ->
+      (a, b) rpath -> Description.path_item list
+    = fun acc path ->
+      match path with
+      | Root -> acc
+      | Static (rpath, name) ->
+          describe_rpath (PStatic name :: acc) rpath
+      | Dynamic (rpath, arg) ->
+          describe_rpath (PDynamic arg.descr :: acc) rpath
+      | DynamicTail (rpath, arg) ->
+          describe_rpath (PDynamicTail arg.descr :: acc) rpath
+
+  (****************************************************************************
+   * Registration
+   ****************************************************************************)
+
+  let rec step_of_path
+    : type p rk. (rk, p) rpath -> step list -> step list
+    = fun path acc ->
+      match path with
+      | Root -> acc
+      | Static (path, name) -> step_of_path path (Static name :: acc)
+      | Dynamic (path, arg) -> step_of_path path (Dynamic arg.descr :: acc)
+      | DynamicTail (path, arg) -> step_of_path path (DynamicTail arg.descr :: acc)
+  let step_of_path p = step_of_path p []
+
+  let conflict path kind = raise (Conflict (step_of_path path, kind))
+
+  let rec insert
+    : type k rk.
+      (rk, k) rpath -> rk directory -> k directory * (k directory -> rk directory)
+    = fun path dir ->
+      match path with
+      | Root -> dir, (fun x -> x)
+      | Static (subpath, name) -> begin
+          let subdir, rebuild = insert subpath dir in
+          let dirmap, services =
+            match subdir with
+            | Empty ->
+                StringMap.empty, MethMap.empty
+            | Static { subdirs = None ; services } ->
+                StringMap.empty, services
+            | Static { subdirs = Some (Suffixes m) ;
+                       services } ->
+                m, services
+            | Static { subdirs = Some (Arg (arg, _)) ; _ } ->
+                conflict path (CType (arg.descr, [name]))
+            | Dynamic _ -> conflict path CBuilder
+            | DynamicTail _ -> conflict path CTail in
+          let dir =
+            try StringMap.find name dirmap with Not_found -> empty in
+          let rebuild s =
+            let subdirs =
+              Some (Suffixes (StringMap.add name s dirmap)) in
+            rebuild (Static { subdirs ; services }) in
+          dir, rebuild
+        end
+      | Dynamic (subpath, arg) -> begin
+          let subdir, rebuild = insert subpath dir in
+          let dir, services =
+            match subdir with
+            | Empty ->
+                Empty, MethMap.empty
+            | Static { subdirs = None ; services } ->
+                Empty, services
+            | Static { subdirs = Some (Arg (arg', dir)) ;
+                       services } -> begin
+                try
+                  let Ty.Eq = Ty.eq arg.id arg'.id in
+                  (dir :> k directory), services
+                with Ty.Not_equal ->
+                  conflict path (CTypes (arg.descr, arg'.descr))
+              end
+            | Static { subdirs = Some (Suffixes m) ; _ } ->
+                conflict path
+                  (CType (arg.descr, List.map fst (StringMap.bindings m)))
+            | Dynamic _ -> conflict path CBuilder
+            | DynamicTail _ -> conflict path CTail
+          in
+          let rebuild s =
+            let subdirs = Some (Arg (arg, s)) in
+            rebuild (Static { subdirs ; services }) in
+          dir, rebuild
+        end
+      | DynamicTail (subpath, arg) -> begin
+          let subdir, rebuild = insert subpath dir in
+          match subdir with
+          | Empty ->
+              let rebuild s = rebuild (DynamicTail (arg, s)) in
+              empty, rebuild
+          | Static { subdirs = None ; services } ->
+              conflict path (CService (fst (MethMap.min_binding services)))
+          | Static { subdirs = Some (Arg (arg, _)) ; _ } ->
+              conflict path (CType (arg.descr, []))
+          | Static { subdirs = Some (Suffixes m) ; _ } ->
+              conflict path
+                (CType (arg.descr, List.map fst (StringMap.bindings m)))
+          | Dynamic _ -> conflict path CBuilder
+          | DynamicTail _ -> conflict path CTail
+        end
+
+  let register
+    : type p q i o e pr.
+      pr directory -> (_, pr, p, q, i, o, e) Service.t ->
+      (p -> q -> i -> (o, e) Answer.t Lwt.t) -> pr directory =
+    fun root s handler ->
+      let s = Service.Internal.to_service s in
+      let register
+        : type k. (pr, k) rpath -> (k -> q -> i -> (o, e) Answer.t Lwt.t) ->
+          pr directory =
+        fun path handler ->
+          let dir, insert = insert path root in
+          let rs =
+            let description : _ Description.service = {
+              meth = s.meth ;
+              path = describe_rpath [] path ;
+              description = s.description ;
+              query = describe_query (Resto.Internal.to_query s.types.query) ;
+              input = begin
+                match s.types.input with
+                | Service.No_input -> None
+                | Service.Input input -> Some (Encoding.schema input)
+              end ;
+              output = Encoding.schema s.types.output ;
+              error = Encoding.schema s.types.error ;
+            } in
+            let builder key = Service {
+                types = s.types ;
+                handler = handler key ;
+              } in
+            { meth = s.meth ; description ; builder } in
+          match dir with
+          | Empty ->
+              insert (Static { services = MethMap.singleton s.meth rs ;
+                               subdirs = None })
+          | Static ({ services ; _ } as dir)
+            when not (MethMap.mem s.meth services) ->
+              insert (Static { dir with services = MethMap.add s.meth rs services })
+          | Static _ -> conflict path (CService s.meth)
+          | Dynamic _ -> conflict path CBuilder
+          | DynamicTail _ -> conflict path CTail in
+      match s.path with
+      | Path p -> register p handler
+      | MappedPath (p, map, _) -> register p (fun p i -> handler (map p) i)
+
+  let register =
+    (register
+     : _ -> (Resto.meth, _, _, _, _, _, _) Service.t ->
+     (_ -> _ -> _ -> (_, _) Answer.t Lwt.t) -> _
+     :> _ -> ([< Resto.meth ], _, _, _, _, _, _) Service.t ->
+     (_ -> _ -> _ -> [< (_, _) Answer.t ] Lwt.t) -> _)
+
+  let register_dynamic_directory
+    : type pr a pr.
+      ?descr:string ->
+      pr directory -> (pr, a) Path.path ->
+      (a -> a directory Lwt.t) -> pr directory =
+    fun ?descr root path builder ->
+      let path = Resto.Internal.to_path path in
+      let register
+        : type k. (pr, k) rpath -> (k -> k directory Lwt.t) -> pr directory =
+        fun path builder ->
+          let dir, insert = insert path root in
+          match dir with
+          | Empty ->
+              insert (Dynamic (descr, builder))
+          | Static ({ services ; subdirs = None }) ->
+              conflict path (CService (fst (MethMap.choose services)))
+          | Static ({ subdirs = Some _ ; _ }) -> conflict path CDir
+          | Dynamic _ -> conflict path CBuilder
+          | DynamicTail _ -> conflict path CTail in
+      match path with
+      | Path p -> register p builder
+      | MappedPath (p, map, _) ->
+          register p
+            (fun args -> builder (map args) >|= map_directory map)
+
+  let register_describe_directory_service
+    : type pr.
+      pr directory ->
+      (pr, pr) Service.description_service ->
+      pr directory
+    = fun root service ->
+      let dir = ref root in
+      let lookup (args, path) { Description.recurse } () =
+        resolve [] root args path >>= function
+        | Error `Not_found
+        | Error `Cannot_parse_path _ ->
+            Lwt.return (`Not_found None)
+        | Ok (Dir (dir, arg)) ->
+            describe_directory ~recurse ~arg (Static dir) >>= function
+            | Static { services ; _ }
+              when not recurse && MethMap.is_empty services ->
+                Lwt.return (`Not_found None)
+            | d ->
+                Lwt.return (`Ok d)
+      in
+      dir := register root service lookup ;
+      !dir
+
+  (****************************************************************************
+   * Let's currify!
+   ****************************************************************************)
+
+  open Curry
+
+  let register0 root s f = register root s (curry Z f)
+  let register1 root s f = register root s (curry (S Z) f)
+  let register2 root s f = register root s (curry (S (S Z)) f)
+  let register3 root s f = register root s (curry (S (S (S Z))) f)
+  let register4 root s f = register root s (curry (S (S (S (S Z)))) f)
+  let register5 root s f = register root s (curry (S (S (S (S (S Z))))) f)
+
+  let register_dynamic_directory1 ?descr root s f =
+    register_dynamic_directory ?descr root s (curry (S Z) f)
+  let register_dynamic_directory2 ?descr root s f =
+    register_dynamic_directory ?descr root s (curry (S (S Z)) f)
+  let register_dynamic_directory3 ?descr root s f =
+    register_dynamic_directory ?descr root s (curry (S (S (S Z))) f)
+
+
+end

vendors/ocplib-resto/lib_resto-directory/restoDirectory.mli

@@ -0,0 +1,194 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Resto
+
+module Answer : sig
+
+  (** Return type for service handler *)
+  type ('o, 'e) t =
+    [ `Ok of 'o (* 200 *)
+    | `OkStream of 'o stream (* 200 *)
+    | `Created of string option (* 201 *)
+    | `No_content (* 204 *)
+    | `Unauthorized of 'e option (* 401 *)
+    | `Forbidden of 'e option (* 403 *)
+    | `Not_found of 'e option (* 404 *)
+    | `Conflict of 'e option (* 409 *)
+    | `Error of 'e option (* 500 *)
+    ]
+
+  and 'a stream = {
+    next: unit -> 'a option Lwt.t ;
+    shutdown: unit -> unit ;
+  }
+
+  val return: 'o -> ('o, 'e) t Lwt.t
+  val return_stream: 'o stream -> ('o, 'e) t Lwt.t
+
+end
+
+module MakeDirectory (Encoding : ENCODING) : sig
+
+  module Service : (module type of (struct include Resto.MakeService(Encoding) end))
+
+  (** Possible error while registring services. *)
+  type step =
+    | Static of string
+    | Dynamic of Arg.descr
+    | DynamicTail of Arg.descr
+
+  type conflict =
+    | CService of meth | CDir | CBuilder | CTail
+    | CTypes of Arg.descr *
+                Arg.descr
+    | CType of Arg.descr * string list
+
+  type ('query, 'input, 'output, 'error) types = {
+    query : 'query Resto.Query.t ;
+    input : 'input Service.input ;
+    output : 'output Encoding.t ;
+    error : 'error Encoding.t ;
+  }
+
+  type registred_service =
+    | Service :
+        { types : ('q, 'i, 'o, 'e) types ;
+          handler : ('q -> 'i -> ('o, 'e) Answer.t Lwt.t) ;
+        } -> registred_service
+
+  (** Dispatch tree *)
+  type 'prefix t
+  type 'prefix directory = 'prefix t
+
+  type lookup_error =
+    [ `Not_found (* 404 *)
+    | `Method_not_allowed of meth list (* 405 *)
+    | `Cannot_parse_path of string list * Arg.descr * string (* 400 *)
+    ]
+
+  (** Resolve a service. *)
+  val lookup:
+    'prefix directory -> 'prefix ->
+    meth -> string list -> (registred_service, [> lookup_error ]) result Lwt.t
+
+  val allowed_methods:
+    'prefix directory -> 'prefix -> string list ->
+    (meth list, [> lookup_error ]) result Lwt.t
+
+  val transparent_lookup:
+    'prefix directory ->
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) Service.t ->
+    'params -> 'query -> 'input -> [> ('output, 'error) Answer.t ] Lwt.t
+
+  (** Empty tree *)
+  val empty: 'prefix directory
+
+  val map: ('a -> 'b) -> 'b directory -> 'a directory
+
+  val prefix: ('pr, 'p) Path.path -> 'p directory -> 'pr directory
+  val merge: 'a directory -> 'a directory -> 'a directory
+
+  exception Conflict of step list * conflict
+
+  (** Registring handler in service tree. *)
+  val register:
+    'prefix directory ->
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) Service.t ->
+    ('params -> 'query -> 'input -> [< ('output, 'error) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  (** Registring handler in service tree. Curryfied variant.  *)
+  val register0:
+    unit directory ->
+    ('m, unit, unit, 'q, 'i, 'o, 'e) Service.t ->
+    ('q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    unit directory
+
+  val register1:
+    'prefix directory ->
+    ('m, 'prefix, unit * 'a, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register2:
+    'prefix directory ->
+    ('m, 'prefix, (unit * 'a) * 'b, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register3:
+    'prefix directory ->
+    ('m, 'prefix, ((unit * 'a) * 'b) * 'c, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'c -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register4:
+    'prefix directory ->
+    ('m, 'prefix, (((unit * 'a) * 'b) * 'c) * 'd, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'c -> 'd -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  val register5:
+    'prefix directory ->
+    ('m, 'prefix, ((((unit * 'a) * 'b) * 'c) * 'd) * 'e, 'q , 'i, 'o, 'e) Service.t ->
+    ('a -> 'b -> 'c -> 'd -> 'e -> 'q -> 'i -> [< ('o, 'e) Answer.t ] Lwt.t) ->
+    'prefix directory
+
+  (** Registring dynamic subtree. *)
+  val register_dynamic_directory:
+    ?descr:string ->
+    'prefix directory ->
+    ('prefix, 'a) Path.path -> ('a -> 'a directory Lwt.t) ->
+    'prefix directory
+
+  (** Registring dynamic subtree. (Curryfied variant) *)
+  val register_dynamic_directory1:
+    ?descr:string ->
+    'prefix directory ->
+    ('prefix, unit * 'a) Path.path ->
+    ('a -> (unit * 'a) directory Lwt.t) ->
+    'prefix directory
+
+  val register_dynamic_directory2:
+    ?descr:string ->
+    'prefix directory ->
+    ('prefix, (unit * 'a) * 'b) Path.path ->
+    ('a -> 'b -> ((unit * 'a) * 'b) directory Lwt.t) ->
+    'prefix directory
+
+  val register_dynamic_directory3:
+    ?descr:string ->
+    'prefix directory ->
+    ('prefix, ((unit * 'a) * 'b) * 'c) Path.path ->
+    ('a -> 'b -> 'c -> (((unit * 'a) * 'b) * 'c) directory Lwt.t) ->
+    'prefix directory
+
+  (** Registring a description service. *)
+  val register_describe_directory_service:
+    'prefix directory ->
+    ('prefix, 'prefix) Service.description_service ->
+    'prefix directory
+
+  (**/**)
+
+  module Curry: sig
+
+    type (_,_,_,_,_,_) conv =
+      | Z : (unit, 'g, 'g, unit, 'f, 'f) conv
+      | S : ('t, 'g, 'b * 's, 'rt, 'f, 'r) conv ->
+        ('t * 'b, 'g, 's, 'a * 'rt, 'a -> 'f, 'r) conv
+    val curry : ('a, 'b, unit, 'b, 'c, 'd) conv -> 'c -> 'a -> 'd
+
+  end
+
+  (**/**)
+
+end

vendors/ocplib-resto/lib_resto-json/jbuild

@@ -0,0 +1,8 @@
+(jbuild_version 1)
+
+(library
+ ((name resto_json)
+  (public_name ocplib-resto-json)
+  (libraries (ocplib-json-typed ocplib-json-typed.bson ocplib-resto))
+  (modules (RestoJson))
+  (wrapped false)))

vendors/ocplib-resto/lib_resto-json/restoJson.ml

@@ -0,0 +1,155 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+module Encoding = struct
+
+  include Json_encoding
+  type 'a t = 'a encoding
+  type schema = Json_schema.schema
+
+  module StringMap = Map.Make(String)
+
+  let arg_encoding =
+    let open Json_encoding in
+    conv
+      (fun {Resto.Arg.name; descr} -> (name, descr))
+      (fun (name, descr) -> {name; descr})
+      (obj2 (req "name" string) (opt "descr" string))
+
+  open Resto.Description
+
+  let meth_encoding =
+    Json_encoding.string_enum
+      [ "GET", `GET ;
+        "POST", `POST ;
+        "DELETE", `DELETE ;
+        "PUT", `PUT ;
+        "PATCH", `PATCH ]
+
+  let path_item_encoding =
+    let open Json_encoding in
+    union [
+      case string
+        (function PStatic s -> Some s | _ -> None)
+        (fun s -> PStatic s) ;
+      case arg_encoding
+        (function PDynamic s -> Some s | _ -> None)
+        (fun s -> PDynamic s) ;
+    ]
+
+  let query_item_encoding =
+    let open Json_encoding in
+    conv
+      (fun {name ; description} -> (name, description))
+      (fun (name, description) -> {name ; description})
+      (obj2 (req "name" string) (opt "description" string))
+
+  let service_descr_encoding =
+    let open Json_encoding in
+    conv
+      (fun { meth ; path ; description ; query ; input ; output ; error } ->
+         (meth, path, description, query, input, output, error))
+      (fun (meth, path, description, query, input, output, error) ->
+         { meth ; path ; description ; query ; input ; output ; error })
+      (obj7
+         (req "meth" meth_encoding)
+         (req "path" (list path_item_encoding))
+         (opt "description" string)
+         (req "query" (list query_item_encoding))
+         (opt "input" any_schema)
+         (req "output" any_schema)
+         (req "erro" any_schema))
+
+  let directory_descr_encoding =
+    let open Json_encoding in
+    mu "service_tree" @@ fun directory_descr_encoding ->
+    let static_subdirectories_descr_encoding =
+      union [
+        case (obj1 (req  "suffixes"
+                      (list (obj2 (req "name" string)
+                               (req "tree" directory_descr_encoding)))))
+          (function Suffixes map ->
+             Some (Resto.StringMap.bindings map) | _ -> None)
+          (fun m ->
+             let add acc (n,t) = Resto.StringMap.add n t acc in
+             Suffixes (List.fold_left add Resto.StringMap.empty m)) ;
+        case (obj1 (req "dynamic_dispatch"
+                      (obj2
+                         (req "arg" arg_encoding)
+                         (req "tree" directory_descr_encoding))))
+          (function Arg (ty, tree) -> Some (ty, tree) | _ -> None)
+          (fun (ty, tree) -> Arg (ty, tree))
+      ] in
+
+    let static_directory_descr_encoding =
+      conv
+        (fun { services ; subdirs } ->
+           let find s =
+             try Some (Resto.MethMap.find s services) with Not_found -> None in
+           (find `GET, find `POST, find `DELETE,
+            find `PUT, find `PATCH, subdirs))
+        (fun (get, post, delete, put, patch, subdirs) ->
+           let add meth s services =
+             match s with
+             | None -> services
+             | Some s -> Resto.MethMap.add meth s services in
+           let services =
+             Resto.MethMap.empty
+             |> add `GET get
+             |> add `POST post
+             |> add `DELETE delete
+             |> add `PUT put
+             |> add `PATCH patch in
+           { services ; subdirs })
+        (obj6
+           (opt "get_service" service_descr_encoding)
+           (opt "post_service" service_descr_encoding)
+           (opt "delete_service" service_descr_encoding)
+           (opt "put_service" service_descr_encoding)
+           (opt "patch_service" service_descr_encoding)
+           (opt "subdirs" static_subdirectories_descr_encoding)) in
+    union [
+      case (obj1 (req "static" static_directory_descr_encoding))
+        (function Static descr -> Some descr | _ -> None)
+        (fun descr -> Static descr) ;
+      case (obj1 (req "dynamic" (option string)))
+        (function Dynamic descr -> Some descr | _ -> None)
+        (fun descr -> Dynamic descr) ;
+    ]
+
+  let description_request_encoding =
+    conv
+      (fun { recurse } -> recurse)
+      (function recurse -> { recurse })
+      (obj1 (dft "recursive" bool false))
+
+  let description_answer_encoding = directory_descr_encoding
+
+end
+
+module type VALUE = sig
+  type t
+  type 'a encoding
+  val construct: 'a encoding -> 'a -> t
+  val destruct: 'a encoding -> t -> 'a
+end
+
+module Ezjsonm = struct
+  type t = Json_repr.Ezjsonm.value
+  let construct = Json_encoding.construct
+  let destruct = Json_encoding.destruct
+end
+
+module Bson = struct
+  open Json_repr_bson
+  type t = Repr.value
+  let construct = Json_encoding.construct
+  let destruct = Json_encoding.destruct
+end

vendors/ocplib-resto/lib_resto-json/restoJson.mli

@@ -0,0 +1,28 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+module Encoding : Resto.ENCODING
+  with type 'a t = 'a Json_encoding.encoding
+   and type schema = Json_schema.schema
+
+module type VALUE = sig
+  type t
+  type 'a encoding
+  val construct: 'a encoding -> 'a -> t
+  val destruct: 'a encoding -> t -> 'a
+end
+
+module Ezjsonm : VALUE
+  with type t = Json_repr.Ezjsonm.value
+   and type 'a encoding := 'a Encoding.t
+
+module Bson : VALUE
+  with type t = Json_repr_bson.bson
+   and type 'a encoding := 'a Encoding.t

vendors/ocplib-resto/lib_resto/jbuild

@@ -0,0 +1,8 @@
+(jbuild_version 1)
+
+(library
+ ((name resto)
+  (public_name ocplib-resto)
+  (modules (Resto))
+  (flags (-w -30))
+  (wrapped false)))

vendors/ocplib-resto/lib_resto/resto.ml

@@ -0,0 +1,589 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+type meth = [ `GET | `POST | `DELETE | `PUT | `PATCH ]
+
+let string_of_meth = function
+  | `GET -> "GET"
+  | `POST -> "POST"
+  | `DELETE -> "DELETE"
+  | `PUT -> "PUT"
+  | `PATCH -> "PATCH"
+
+module MethMap = Map.Make(struct type t = meth let compare = compare end)
+module StringMap = Map.Make(String)
+
+module Internal = struct
+
+  module Ty = struct
+
+    type 'a witness = ..
+    exception Not_equal
+    type (_, _) eq = Eq : ('a, 'a) eq
+    module type Ty = sig
+      type t val witness : t witness
+      val eq: 'a witness -> ('a, t) eq
+    end
+    type 'a id = (module Ty with type t = 'a)
+    let new_id (type a) () =
+      let module Ty = struct
+        type t = a
+        type 'a witness += Ty : t witness
+        let witness = Ty
+        let eq (type b) : b witness -> (b, t) eq =
+          function Ty -> Eq | _ -> raise Not_equal
+      end in
+      (module Ty : Ty with type t = a)
+    let eq : type a b. a id -> b id -> (a, b) eq =
+      fun (module TyA) (module TyB) ->  TyB.eq TyA.witness
+
+  end
+
+  type descr = {
+    name: string ;
+    descr: string option ;
+  }
+
+  type 'a arg = {
+    id: 'a Ty.id;
+    destruct: string -> ('a, string) result ;
+    construct: 'a -> string ;
+    descr: descr ;
+  }
+
+  let from_arg x = x
+  let to_arg x = x
+
+  type (_,_) rpath =
+    | Root : ('rkey, 'rkey) rpath
+    | Static : ('rkey, 'key) rpath * string -> ('rkey, 'key) rpath
+    | Dynamic : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a) rpath
+    | DynamicTail : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a list) rpath
+
+  type (_,_) path =
+    | Path: ('prefix, 'params) rpath -> ('prefix, 'params) path
+    | MappedPath:
+        ('prefix, 'key) rpath * ('key -> 'params) * ('params -> 'key) ->
+      ('prefix, 'params) path
+
+  let from_path x = x
+  let to_path x = x
+
+  type 'a query =
+    (* inspired from Irmin.Ty.record. *)
+    | Fields: ('a, 'b) query_fields * 'b -> 'a query
+
+  and ('a, 'b) query_fields =
+    | F0: ('a, 'a) query_fields
+    | F1: ('a, 'b) query_field * ('a, 'c) query_fields ->
+      ('a, 'b -> 'c) query_fields
+
+  and ('a, 'b) query_field = {
+    fname : string ;
+    ftype : 'b arg ;
+    fdefault : 'b ;
+    fget : 'a -> 'b ;
+    fdescription : string option ;
+  }
+
+  let from_query x = x
+  let to_query x = x
+
+end
+
+open Internal
+
+module Arg = struct
+
+  type descr = Internal.descr = {
+    name: string ;
+    descr: string option ;
+  }
+  type 'a t = 'a Internal.arg
+  type 'a arg = 'a t
+
+  let make ?descr ~name ~destruct ~construct () =
+    let id = Ty.new_id () in
+    let descr = { name ; descr } in
+    { descr ; id ; construct ; destruct }
+
+  let like arg ?descr name =
+    { arg with id = Ty.new_id () ; descr = { name ; descr } }
+
+  let descr (ty: 'a arg) = ty.descr
+
+  let bool : bool arg =
+    let bool_of_string s =
+      match String.lowercase_ascii s with
+      | "false" | "no" -> Ok false
+      | _ -> Ok true in
+    let string_of_bool = function
+      | true -> "yes"
+      | false -> "no" in
+    make ~name:"bool" ~destruct:bool_of_string ~construct:string_of_bool ()
+  let int =
+    let int_of_string s =
+      try Ok (int_of_string s)
+      with Failure _ ->
+        Error (Printf.sprintf "Cannot parse integer value: %S." s) in
+    make ~name:"int" ~destruct:int_of_string ~construct:string_of_int ()
+  let float =
+    let float_of_string s =
+      try Ok (float_of_string s)
+      with Failure _ ->
+        Error (Printf.sprintf "Cannot parse float value: %S." s) in
+    make ~name:"float" ~destruct:float_of_string ~construct:string_of_float ()
+  let int32 =
+    let int32_of_string s =
+      try Ok (Int32.of_string s)
+      with Failure _ ->
+        Error (Printf.sprintf "Cannot parse int32 value: %S." s) in
+    make ~name:"int32" ~destruct:int32_of_string ~construct:Int32.to_string ()
+  let int64 =
+    let int64_of_string s =
+      try Ok (Int64.of_string s)
+      with Failure _ ->
+        Error (Printf.sprintf "Cannot parse int64 value: %S." s) in
+    make ~name:"int64" ~destruct:int64_of_string ~construct:Int64.to_string ()
+  let string =
+    make ~name:"string" ~destruct:(fun x -> Ok x) ~construct:(fun x -> x) ()
+
+end
+
+module Path = struct
+
+  type ('a, 'b) t = ('a, 'b) Internal.path
+  type ('a, 'b) path = ('a, 'b) Internal.path
+  type ('a, 'b) rpath = ('a, 'b) Internal.rpath
+
+  type 'prefix context = ('prefix, 'prefix) path
+
+  let root = Path Root
+  let open_root = Path Root
+
+  let add_suffix (type p pr) (path : (p, pr) path) name =
+    match path with
+    | Path (DynamicTail _) -> invalid_arg "Resto.Path.add_suffix"
+    | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.add_suffix"
+    | Path path -> Path (Static (path, name))
+    | MappedPath (path, map, rmap) ->
+        MappedPath (Static (path, name), map, rmap)
+
+  let add_arg (type p pr) (path : (p, pr) path)  arg =
+    match path with
+    | Path (DynamicTail _) -> invalid_arg "Resto.Path.add_arg"
+    | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.add_arg"
+    | Path path -> Path (Dynamic (path, arg))
+    | MappedPath (path, map, rmap) ->
+        MappedPath (Dynamic (path, arg),
+                    (fun (x, y) -> (map x, y)),
+                    (fun (x, y) -> (rmap x, y)))
+
+  let add_final_args (type p pr) (path : (p, pr) path)  arg =
+    match path with
+    | Path (DynamicTail _) -> invalid_arg "Resto.Path.add_final_arg"
+    | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.add_final_arg"
+    | Path path -> Path (DynamicTail (path, arg))
+    | MappedPath (path, map, rmap) ->
+        MappedPath (DynamicTail (path, arg),
+                    (fun (x, y) -> (map x, y)),
+                    (fun (x, y) -> (rmap x, y)))
+
+  let map map rmap = function
+    | Path p -> MappedPath (p, map, rmap)
+    | MappedPath (p, map', rmap') ->
+        MappedPath (p, (fun x -> map (map' x)), (fun x -> rmap' (rmap x)))
+
+  let prefix
+    : type p pr a. (pr, a) path -> (a, p) path -> (pr, p) path
+    = fun p1 p2 ->
+      let rec prefix
+        : type pr a k.
+          (pr, a) path -> (a, k) rpath -> (pr, k) path
+        = fun p1 p2 ->
+          match p2 with
+          | Root -> p1
+          | Static (path, name) -> add_suffix (prefix p1 path) name
+          | Dynamic (path, arg) -> add_arg (prefix p1 path) arg
+          | DynamicTail (path, arg) -> add_final_args (prefix p1 path) arg
+      in
+      match p1 with
+      | Path (DynamicTail _) -> invalid_arg "Resto.Path.prefix"
+      | MappedPath (DynamicTail _, _, _) -> invalid_arg "Resto.Path.prefix"
+      | _ ->
+          match p2 with
+          | Path p2 -> prefix p1 p2
+          | MappedPath (p2, m, rm) -> map m rm (prefix p1 p2)
+
+  let (/) = add_suffix
+  let (/:) = add_arg
+  let (/:*) = add_final_args
+
+end
+
+module Query = struct
+
+  type 'a t = 'a Internal.query
+  type 'a query = 'a Internal.query
+  type ('a, 'b) field = ('a, 'b) Internal.query_field
+
+  type ('a, 'b, 'c) open_query =
+    ('a, 'c) query_fields -> 'b * ('a, 'b) query_fields
+
+  let field ?descr fname ftype fdefault fget =
+    { fname; ftype; fdefault ; fget ; fdescription = descr }
+
+  let query : 'b -> ('a, 'b, 'b) open_query =
+    fun c fs -> c, fs
+
+  let app : type a b c d.
+    (a, b, c -> d) open_query -> (a, c) query_field -> (a, b, d) open_query
+    = fun r f fs ->
+      let c, fs = r (F1 (f, fs)) in
+      c, fs
+
+  let seal : type a b. (a, b, a) open_query -> a t =
+    fun r ->
+      let c, fs = r F0 in
+      Fields (fs, c)
+
+  let (|+) = app
+
+  let empty = Fields (F0 , ())
+
+  type 'a efield = Field: ('a, 'b) query_field -> 'a efield
+  let fold_fields (type fs) ~f ~init fs =
+    let rec loop : type f. _ -> (fs, f) query_fields -> _ = fun acc -> function
+      | F0 -> acc
+      | F1 (field, fs) -> loop (f acc (Field field)) fs in
+    loop init fs
+
+  type 'a parsed_field =
+    | Parsed: ('a, 'b) query_field * 'b option -> 'a parsed_field
+
+  let rec rebuild
+    : type fs f. _ -> (fs, f) query_fields -> f -> fs
+    = fun map fs f ->
+      match fs with
+      | F0 -> f
+      | F1 (field, fs) ->
+          let Parsed (field', v) = StringMap.find field.fname map in
+          let Ty.Eq = Ty.eq field.ftype.id field'.ftype.id in
+          let v = match v with None -> field.fdefault | Some v -> v in
+          rebuild map fs (f v)
+
+  exception Invalid of string
+  type untyped = (string * string) list
+  let parse (Fields (fs, f)) =
+    let fields =
+      fold_fields
+        ~f:(fun map (Field f) -> StringMap.add f.fname (Parsed (f, None)) map)
+        ~init:StringMap.empty
+        fs in
+    fun query ->
+      let fail fmt = Format.kasprintf (fun s -> raise (Invalid s)) fmt in
+      let fields =
+        List.fold_left
+          begin fun fields (name, value) ->
+            match StringMap.find name fields with
+            | exception Not_found -> fields
+            | (Parsed (f, Some _)) ->
+                (* TODO add an option to parse multiple as list. *)
+                fail "Duplicate argument '%s' in query string." name
+            | (Parsed (f, None)) ->
+                match f.ftype.destruct value with
+                | Error error ->
+                    fail "Failed to parse argument '%s' (%S): %s"
+                      name value error
+                | Ok v -> StringMap.add name (Parsed (f, Some v)) fields
+          end
+          fields query in
+      rebuild fields fs f
+
+end
+
+module Description = struct
+
+  type request = {
+    recurse: bool ;
+  }
+
+  let request_query =
+    let open Query in
+    query (fun recurse -> { recurse })
+    |+ field "recurse" Arg.bool false (fun t -> t.recurse)
+    |> seal
+
+  type 'schema service = {
+    description: string option ;
+    path: path_item list ;
+    meth: meth ;
+    query: query_item list ;
+    input: 'schema option ;
+    output: 'schema ;
+    error: 'schema ;
+  }
+
+  and path_item =
+    | PStatic of string
+    | PDynamic of Arg.descr
+    | PDynamicTail of Arg.descr
+
+  and query_item = {
+    name: string ;
+    description: string option ;
+  }
+
+  type 'schema directory =
+    | Empty
+    | Static of 'schema static_directory
+    | Dynamic of string option
+
+  and 'schema static_directory = {
+    services: 'schema service MethMap.t ;
+    subdirs: 'schema static_subdirectories option ;
+  }
+
+  and 'schema static_subdirectories =
+    | Suffixes of 'schema directory Map.Make(String).t
+    | Arg of Arg.descr * 'schema directory
+
+  let rec pp_print_directory ppf =
+    let open Format in
+    function
+    | Empty ->
+        fprintf ppf "<empty>"
+    | Static dir ->
+        fprintf ppf "@[%a@]" pp_print_static_directory dir
+    | Dynamic None ->
+        fprintf ppf "<dyntree>"
+    | Dynamic (Some descr) ->
+        fprintf ppf "<dyntree> : %s" descr
+
+  and pp_print_static_directory ppf =
+    let open Format in
+    function
+    | { services ; subdirs = None } when MethMap.is_empty services ->
+        fprintf ppf "{}"
+    | { services ; subdirs = None } ->
+        fprintf ppf "@[<v>%a@]"
+          pp_print_dispatch_services services
+    | { services ; subdirs = Some subdirs } when MethMap.is_empty services ->
+        fprintf ppf "%a"
+          pp_print_static_subdirectories subdirs
+    | { services ; subdirs = Some subdirs } ->
+        fprintf ppf "@[<v>%a@ %a@]"
+          pp_print_dispatch_services services
+          pp_print_static_subdirectories subdirs
+
+  and pp_print_static_subdirectories ppf =
+    let open Format in
+    function
+    | Suffixes map ->
+        let print_binding ppf (name, tree) =
+          fprintf ppf "@[<hov 2>%s:@ %a@]"
+            name pp_print_directory tree in
+        fprintf ppf "@[<v>%a@]"
+          (pp_print_list ~pp_sep:pp_print_cut print_binding)
+          (StringMap.bindings map)
+    | Arg (arg, tree) ->
+        fprintf ppf "@[<hov 2>[:%s:]@ @[%a@]@]"
+          (arg.name) pp_print_directory tree
+
+  and pp_print_dispatch_services ppf services =
+    MethMap.iter
+      begin fun meth s ->
+        match s with
+        | { description = None ; meth ; _ } ->
+            Format.fprintf ppf "<%s>" (string_of_meth meth)
+        | { description = Some descr ; meth ; _ } ->
+            Format.fprintf ppf "<%s> : %s" (string_of_meth meth) descr
+      end
+      services
+
+end
+
+module type ENCODING = sig
+  type 'a t
+  type schema
+  val unit : unit t
+  val schema : 'a t -> schema
+  val description_request_encoding : Description.request t
+  val description_answer_encoding : schema Description.directory t
+end
+
+module MakeService(Encoding : ENCODING) = struct
+
+  module Internal = struct
+    include Internal
+    type ('query, 'input, 'output, 'error) types = {
+      query : 'query query ;
+      input : 'input input ;
+      output : 'output Encoding.t ;
+      error : 'error Encoding.t ;
+    }
+    and _ input =
+      | No_input : unit input
+      | Input : 'input Encoding.t -> 'input input
+    type (+'meth, 'prefix, 'params, 'query,
+          'input, 'output, 'error) iservice = {
+      description : string option ;
+      meth : 'meth ;
+      path : ('prefix, 'params) path ;
+      types : ('query, 'input, 'output, 'error) types ;
+    } constraint 'meth = [< meth ]
+    let from_service x = x
+    let to_service x = x
+
+    type (_, _) eq =
+      | Eq : (('query, 'input, 'output, 'error) types,
+              ('query, 'input, 'output, 'error) types) eq
+    exception Not_equal
+    let eq :
+      type query1 input1 output1 error1  query2 input2 output2 error2.
+      (query1, input1, output1, error1) types ->
+      (query2, input2, output2, error2) types ->
+      ((query1, input1, output1, error1) types,
+       (query2, input2, output2, error2) types) eq
+      = fun x y ->
+        if Obj.magic x == Obj.magic y then
+          Obj.magic Eq (* FIXME *)
+        else
+          raise Not_equal
+
+  end
+  include Internal
+  open Path
+
+  type (+'meth, 'prefix, 'params, 'query, 'input, 'output, 'error) t =
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) Internal.iservice
+  type (+'meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service =
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) t
+
+  let get_service ?description ~query ~output ~error path =
+    let input = No_input in
+    { meth = `GET ; description ; path ;
+      types = { query ; input ; output ; error } }
+
+  let post_service ?description ~query ~input ~output ~error path =
+    let input = Input input in
+    { meth = `POST ; description ; path ;
+      types = { query ; input ; output ; error } }
+
+  let delete_service ?description ~query ~output ~error path =
+    let input = No_input in
+    { meth = `DELETE ; description ; path ;
+      types = { query ; input ; output ; error } }
+
+  let put_service ?description ~query ~input ~output ~error path =
+    let input = Input input in
+    { meth = `PUT ; description ; path ;
+      types = { query ; input ; output ; error } }
+
+  let patch_service ?description ~query ~input ~output ~error path =
+    let input = Input input in
+    { meth = `PATCH ; description ; path ;
+      types = { query ; input ; output ; error } }
+
+  let prefix path s = { s with path = Path.prefix path s.path }
+
+  let map f g (s : (_,_,_,_,_,_,_) service) =
+    { s with path = Path.map f g s.path }
+
+
+  let query
+    : type pr p i q o e.
+      (_, pr, p, q, i, o, e) service -> q Query.t
+    = fun { types } -> types.query
+
+  let input_encoding
+    : type pr p i q o e.
+      (_, pr , p, q, i, o, e) service -> i input
+    = fun { types } -> types.input
+
+  let output_encoding
+    : type pr p i q o e.
+      (_, pr, p, q, i, o, e) service -> o Encoding.t
+    = fun { types } -> types.output
+
+  let error_encoding
+    : type pr p i q o e.
+      (_, pr, p, q, i, o, e) service -> e Encoding.t
+    = fun { types } -> types.error
+
+  type ('prefix, 'params) description_service =
+    ([ `GET ], 'prefix, 'params * string list, Description.request,
+     unit, Encoding.schema Description.directory, unit) service
+
+  let description_service ?description path =
+    let description =
+      match description with
+      | Some descr -> descr
+      | None -> "<TODO>"
+    in
+    get_service
+      ~description
+      ~query:Description.request_query
+      ~output:Encoding.description_answer_encoding
+      ~error:Encoding.unit
+      Path.(path /:* Arg.string)
+
+  type 'input request = {
+    meth: meth ;
+    path: string list ;
+    query: (string * string) list ;
+    input: 'input input ;
+  }
+
+  let forge_request_args
+    : type p. (unit, p) path -> p -> string list
+    = fun path args ->
+      let rec forge_request_args
+        : type k. (unit, k) rpath -> k -> string list -> string list
+        = fun path args acc ->
+          match path, args with
+          | Root, _ ->
+              acc
+          | Static (path, name), args ->
+              forge_request_args path args (name :: acc)
+          | Dynamic (path, arg), (args, x) ->
+              forge_request_args path args (arg.construct x :: acc)
+          | DynamicTail (path, arg), (args, xs) ->
+              forge_request_args path args
+                (List.fold_right (fun x acc -> arg.construct x :: acc) xs acc) in
+      match path with
+      | Path path -> forge_request_args path args []
+      | MappedPath (path, _, rmap) -> forge_request_args path (rmap args) []
+
+  let forge_request_query
+    : type q. q query -> q -> (string * string) list
+    = fun (Fields (fields, _)) q ->
+      let rec loop : type t. (q, t) query_fields -> _ = function
+        | F0 -> []
+        | F1 ({ fname ; ftype ; fget ; _ }, fields) ->
+            (fname, ftype.construct (fget q)) :: loop fields in
+      loop fields
+
+  let forge_request
+    : type p i q o e.
+      (_, unit, p, q, i, o, e) service -> p -> q -> i request
+    = fun s args query ->
+      { meth = s.meth ;
+        path = forge_request_args s.path args ;
+        query = forge_request_query s.types.query query ;
+        input = s.types.input ;
+      }
+
+  let forge_request =
+    (forge_request
+     : (meth, _, _, _, _, _, _) service -> _
+     :> ([< meth], _, _, _, _, _, _) service -> _ )
+
+end

vendors/ocplib-resto/lib_resto/resto.mli

@@ -0,0 +1,366 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+type meth = [ `GET | `POST | `DELETE | `PUT | `PATCH ]
+
+val string_of_meth: meth -> string
+
+module MethMap : Map.S with type key = meth
+module StringMap : Map.S with type key = string
+
+(** Typed path argument. *)
+module Arg : sig
+
+  type 'a t
+  type 'a arg = 'a t
+  val make:
+    ?descr:string ->
+    name:string ->
+    destruct:(string -> ('a, string) result) ->
+    construct:('a -> string) ->
+    unit -> 'a arg
+
+  type descr = {
+    name: string ;
+    descr: string option ;
+  }
+  val descr: 'a arg -> descr
+
+  val bool: bool arg
+  val int: int arg
+  val int32: int32 arg
+  val int64: int64 arg
+  val float: float arg
+  val string: string arg
+
+  val like: 'a arg -> ?descr:string -> string -> 'a arg
+
+end
+
+
+(** Parametrized path to services. *)
+module Path : sig
+
+  type ('prefix, 'params) t
+  type ('prefix, 'params) path = ('prefix, 'params) t
+  type 'prefix context = ('prefix, 'prefix) path
+
+  val root: unit context
+  val open_root: 'a context
+
+  val add_suffix:
+    ('prefix, 'params) path -> string -> ('prefix, 'params) path
+  val (/):
+    ('prefix, 'params) path -> string -> ('prefix, 'params) path
+
+  val add_arg:
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a) path
+  val (/:):
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a) path
+
+  val add_final_args:
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a list) path
+  val (/:*):
+    ('prefix, 'params) path -> 'a Arg.t -> ('prefix, 'params * 'a list) path
+
+  val prefix:
+    ('prefix, 'a) path -> ('a, 'params) path -> ('prefix, 'params) path
+
+  val map:
+    ('a -> 'b) -> ('b -> 'a) -> ('prefix, 'a) path -> ('prefix, 'b) path
+
+end
+
+(** Service directory description *)
+module Description : sig
+
+  type request = {
+    recurse: bool ;
+  }
+
+  type 'schema service = {
+    description: string option ;
+    path: path_item list ;
+    meth: meth ;
+    query: query_item list ;
+    input: 'schema option ;
+    output: 'schema ;
+    error: 'schema ;
+  }
+
+  and path_item =
+    | PStatic of string
+    | PDynamic of Arg.descr
+    | PDynamicTail of Arg.descr
+
+  and query_item = {
+    name: string ;
+    description: string option ;
+  }
+
+  type 'schema directory =
+    | Empty
+    | Static of 'schema static_directory
+    | Dynamic of string option
+
+  and 'schema static_directory = {
+    services: 'schema service MethMap.t ;
+    subdirs: 'schema static_subdirectories option ;
+  }
+
+  and 'schema static_subdirectories =
+    | Suffixes of 'schema directory StringMap.t
+    | Arg of Arg.descr * 'schema directory
+
+  val pp_print_directory:
+    (* ?pp_schema:(Format.formatter -> 'schema -> unit) -> *) (* TODO ?? *)
+    Format.formatter -> 'schema directory -> unit
+
+end
+
+module Query : sig
+
+  type 'a t
+  type 'a query = 'a t
+
+  val empty: unit query
+
+  type ('a, 'b) field
+  val field:
+    ?descr: string ->
+    string -> 'a Arg.t -> 'a -> ('b -> 'a) -> ('b, 'a) field
+
+  type ('a, 'b, 'c) open_query
+  val query: 'b -> ('a, 'b, 'b) open_query
+  val (|+):
+    ('a, 'b, 'c -> 'd) open_query ->
+    ('a, 'c) field -> ('a, 'b, 'd) open_query
+  val seal: ('a, 'b, 'a) open_query -> 'a t
+
+  type untyped = (string * string) list
+  exception Invalid of string
+  val parse: 'a query -> untyped -> 'a
+
+end
+
+(**/**)
+
+module Internal : sig
+
+  module Ty : sig
+
+    exception Not_equal
+    type (_, _) eq = Eq : ('a, 'a) eq
+
+    type 'a id
+    val eq : 'a id -> 'b id -> ('a, 'b) eq
+
+  end
+
+  type 'a arg = {
+    id: 'a Ty.id;
+    destruct: string -> ('a, string) result ;
+    construct: 'a -> string ;
+    descr: Arg.descr ;
+  }
+
+  val from_arg : 'a arg -> 'a Arg.t
+  val to_arg : 'a Arg.t -> 'a arg
+
+  type (_, _) rpath =
+    | Root : ('rkey, 'rkey) rpath
+    | Static : ('rkey, 'key) rpath * string -> ('rkey, 'key) rpath
+    | Dynamic : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a) rpath
+    | DynamicTail : ('rkey, 'key) rpath * 'a arg -> ('rkey, 'key * 'a list) rpath
+
+  type (_, _) path =
+    | Path: ('prefix, 'params) rpath -> ('prefix, 'params) path
+    | MappedPath:
+        ('prefix, 'key) rpath * ('key -> 'params) * ('params -> 'key) ->
+      ('prefix, 'params) path
+
+  val from_path : ('a, 'b) path -> ('a, 'b) Path.t
+  val to_path : ('a, 'b) Path.t -> ('a, 'b) path
+
+  type 'a query =
+    | Fields: ('a, 'b) query_fields * 'b -> 'a query
+
+  and ('a, 'b) query_fields =
+    | F0: ('a, 'a) query_fields
+    | F1: ('a, 'b) query_field * ('a, 'c) query_fields ->
+      ('a, 'b -> 'c) query_fields
+
+  and ('a, 'b) query_field = {
+    fname : string ;
+    ftype : 'b arg ;
+    fdefault : 'b ;
+    fget : 'a -> 'b ;
+    fdescription : string option ;
+  }
+
+  val from_query : 'a query -> 'a Query.t
+  val to_query : 'a Query.t -> 'a query
+
+end
+
+(**/**)
+
+module type ENCODING = sig
+  type 'a t
+  type schema
+  val unit : unit t
+  val schema : 'a t -> schema
+  val description_request_encoding : Description.request t
+  val description_answer_encoding : schema Description.directory t
+end
+
+module MakeService(Encoding : ENCODING) : sig
+
+  (** Services. *)
+  type (+'meth, 'prefix, 'params, 'query, 'input, 'output, 'error) t
+    constraint 'meth = [< meth ]
+  type (+'meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service =
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) t
+
+  val query:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'query Query.t
+
+  type _ input =
+    | No_input : unit input
+    | Input : 'input Encoding.t -> 'input input
+
+  val input_encoding:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'input input
+
+  val output_encoding:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'output Encoding.t
+
+  val error_encoding:
+    ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+    'error Encoding.t
+
+  val get_service:
+    ?description: string ->
+    query: 'query Query.t ->
+    output: 'output Encoding.t ->
+    error: 'error Encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `GET ], 'prefix, 'params, 'query, unit, 'output, 'error) service
+
+  val post_service:
+    ?description: string ->
+    query:'query Query.t ->
+    input: 'input Encoding.t ->
+    output: 'output Encoding.t ->
+    error: 'error Encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `POST ], 'prefix, 'params, 'query, 'input, 'output, 'error) service
+
+  val delete_service:
+    ?description: string ->
+    query:'query Query.t ->
+    output: 'output Encoding.t ->
+    error: 'error Encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `DELETE ], 'prefix, 'params, 'query, unit, 'output, 'error) service
+
+  val patch_service:
+    ?description: string ->
+    query:'query Query.t ->
+    input: 'input Encoding.t ->
+    output: 'output Encoding.t ->
+    error: 'error Encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `PATCH ], 'prefix, 'params, 'query, 'input, 'output, 'error) service
+
+  val put_service:
+    ?description: string ->
+    query:'query Query.t ->
+    input: 'input Encoding.t ->
+    output: 'output Encoding.t ->
+    error: 'error Encoding.t ->
+    ('prefix, 'params) Path.t ->
+    ([ `PUT ], 'prefix, 'params, 'query, 'input, 'output, 'error) service
+
+  val prefix:
+    ('prefix, 'inner_prefix) Path.t ->
+    ('meth, 'inner_prefix, 'params, 'query,
+     'input, 'output, 'error) service ->
+    ('meth, 'prefix, 'params,
+     'query, 'input, 'output, 'error) service
+
+  val map:
+    ('a -> 'b) ->
+    ('b -> 'a) ->
+    ('meth, 'pr, 'a, 'q, 'i, 'o, 'e) service ->
+    ('meth, 'pr, 'b, 'q, 'i, 'o, 'e) service
+
+  type ('prefix, 'params) description_service =
+    ([ `GET ], 'prefix, 'params * string list, Description.request,
+     unit, Encoding.schema Description.directory, unit) service
+
+  val description_service:
+    ?description:string ->
+    ('prefix, 'params) Path.t ->
+    ('prefix, 'params) description_service
+
+  type 'input request = {
+    meth: meth ;
+    path: string list ;
+    query: (string * string) list ;
+    input: 'input input ;
+  }
+
+  val forge_request:
+    ('meth, unit, 'params, 'query, 'input, 'output, 'error) service ->
+    'params -> 'query -> 'input request
+
+  module Internal : sig
+
+    include (module type of (struct include Internal end))
+
+    type ('query, 'input, 'output, 'error) types = {
+      query : 'query Query.t ;
+      input : 'input input ;
+      output : 'output Encoding.t ;
+      error : 'error Encoding.t ;
+    }
+
+    type (+'meth, 'prefix, 'params, 'query,
+          'input, 'output, 'error) iservice = {
+      description : string option ;
+      meth : 'meth ;
+      path : ('prefix, 'params) path ;
+      types : ('query, 'input, 'output, 'error) types ;
+    } constraint 'meth = [< meth ]
+
+    exception Not_equal
+    type (_, _) eq =
+      | Eq : (('query, 'input, 'output, 'error) types,
+              ('query, 'input, 'output, 'error) types) eq
+    val eq :
+      ('query1, 'input1, 'output1, 'error1) types ->
+      ('query2, 'input2, 'output2, 'error2) types ->
+      (('query1, 'input1, 'output1, 'error1) types,
+       ('query2, 'input2, 'output2, 'error2) types) eq
+
+    val from_service:
+      ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) iservice ->
+      ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service
+    val to_service:
+      ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) service ->
+      ('meth, 'prefix, 'params, 'query, 'input, 'output, 'error) iservice
+
+  end
+
+end

vendors/ocplib-resto/ocplib-ezresto-directory.opam

@@ -0,0 +1,24 @@
+version: "dev"
+opam-version: "1.2"
+name: "ocplib-resto-directory"
+maintainer: "Grégoire Henry <gregoire.henry@tezos.com>"
+authors: "Grégoire Henry <gregoire.henry@tezos.com>"
+license: "LGPL-2.1-with-OCaml-exception"
+homepage: "https://github.com/OCamlPro/ocplib-resto"
+bug-reports: "https://github.com/OCamlPro/ocplib-resto/issues"
+dev-repo: "git+https://github.com/OCamlPro/ocplib-resto"
+
+build: [
+  [ "jbuilder" "subst" "-n" "ocplib-resto" ] {pinned}
+  [ "jbuilder" "build" "-p" name "-j" jobs ]
+]
+build-test: [
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
+]
+
+depends: [
+  "ocamlfind" {build}
+  "jbuilder" {build}
+  "ocplib-ezresto"
+  "ocplib-resto-directory"
+]

vendors/ocplib-resto/ocplib-ezresto.opam

@@ -0,0 +1,24 @@
+version: "dev"
+opam-version: "1.2"
+name: "ocplib-ezresto"
+maintainer: "Grégoire Henry <gregoire.henry@tezos.com>"
+authors: "Grégoire Henry <gregoire.henry@tezos.com>"
+license: "LGPL-2.1-with-OCaml-exception"
+homepage: "https://github.com/OCamlPro/ocplib-resto"
+bug-reports: "https://github.com/OCamlPro/ocplib-resto/issues"
+dev-repo: "git+https://github.com/OCamlPro/ocplib-resto"
+
+build: [
+  [ "jbuilder" "subst" "-n" "ocplib-resto" ] {pinned}
+  [ "jbuilder" "build" "-p" name "-j" jobs ]
+]
+build-test: [
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
+]
+
+depends: [
+  "ocamlfind" {build}
+  "jbuilder" {build}
+  "ocplib-resto"
+  "ocplib-resto-json"
+]

vendors/ocplib-resto/ocplib-resto-cohttp.opam

@@ -0,0 +1,24 @@
+version: "dev"
+opam-version: "1.2"
+name: "ocplib-resto-cohttp"
+maintainer: "Grégoire Henry <gregoire.henry@tezos.com>"
+authors: "Grégoire Henry <gregoire.henry@tezos.com>"
+license: "LGPL-2.1-with-OCaml-exception"
+homepage: "https://github.com/OCamlPro/ocplib-resto"
+bug-reports: "https://github.com/OCamlPro/ocplib-resto/issues"
+dev-repo: "git+https://github.com/OCamlPro/ocplib-resto"
+
+build: [
+  [ "jbuilder" "subst" "-n" "ocplib-resto" ] {pinned}
+  [ "jbuilder" "build" "-p" name "-j" jobs ]
+]
+build-test: [
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
+]
+
+depends: [
+  "ocamlfind" {build}
+  "jbuilder" {build}
+  "ocplib-resto-directory"
+  "cohttp-lwt-unix"
+]

vendors/ocplib-resto/ocplib-resto-directory.opam

@@ -0,0 +1,24 @@
+version: "dev"
+opam-version: "1.2"
+name: "ocplib-resto-directory"
+maintainer: "Grégoire Henry <gregoire.henry@tezos.com>"
+authors: "Grégoire Henry <gregoire.henry@tezos.com>"
+license: "LGPL-2.1-with-OCaml-exception"
+homepage: "https://github.com/OCamlPro/ocplib-resto"
+bug-reports: "https://github.com/OCamlPro/ocplib-resto/issues"
+dev-repo: "git+https://github.com/OCamlPro/ocplib-resto"
+
+build: [
+  [ "jbuilder" "subst" "-n" "ocplib-resto" ] {pinned}
+  [ "jbuilder" "build" "-p" name "-j" jobs ]
+]
+build-test: [
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
+]
+
+depends: [
+  "ocamlfind" {build}
+  "jbuilder" {build}
+  "ocplib-resto"
+  "lwt"
+]

vendors/ocplib-resto/ocplib-resto-json.opam

@@ -0,0 +1,24 @@
+version: "dev"
+opam-version: "1.2"
+name: "ocplib-resto-json"
+maintainer: "Grégoire Henry <gregoire.henry@tezos.com>"
+authors: "Grégoire Henry <gregoire.henry@tezos.com>"
+license: "LGPL-2.1-with-OCaml-exception"
+homepage: "https://github.com/OCamlPro/ocplib-resto"
+bug-reports: "https://github.com/OCamlPro/ocplib-resto/issues"
+dev-repo: "git+https://github.com/OCamlPro/ocplib-resto"
+
+build: [
+  [ "jbuilder" "subst" "-n" "ocplib-resto" ] {pinned}
+  [ "jbuilder" "build" "-p" name "-j" jobs ]
+]
+build-test: [
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
+]
+
+depends: [
+  "ocamlfind" {build}
+  "jbuilder" {build}
+  "ocplib-resto"
+  "ocplib-json-typed" { >= "0.4" }
+]

vendors/ocplib-resto/ocplib-resto.opam

@@ -0,0 +1,22 @@
+version: "dev"
+opam-version: "1.2"
+name: "ocplib-resto"
+maintainer: "Grégoire Henry <gregoire.henry@tezos.com>"
+authors: "Grégoire Henry <gregoire.henry@tezos.com>"
+license: "LGPL-2.1-with-OCaml-exception"
+homepage: "https://github.com/OCamlPro/ocplib-resto"
+bug-reports: "https://github.com/OCamlPro/ocplib-resto/issues"
+dev-repo: "git+https://github.com/OCamlPro/ocplib-resto"
+
+build: [
+  [ "jbuilder" "subst" "-n" "ocplib-resto" ] {pinned}
+  [ "jbuilder" "build" "-p" name "-j" jobs ]
+]
+build-test: [
+  [ "jbuilder" "runtest" "-p" name "-j" jobs ]
+]
+
+depends: [
+  "ocamlfind" {build}
+  "jbuilder" {build}
+]

vendors/ocplib-resto/ocplib-resto.version

@@ -0,0 +1 @@
+0.2

vendors/ocplib-resto/test/directory.ml

@@ -0,0 +1,47 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Services
+
+include RestoDirectory.MakeDirectory(RestoJson.Encoding)
+
+let rec repeat i json =
+  if i <= 0 then []
+  else json :: repeat (i-1) json
+
+let dir = empty
+let dir =
+  register1 dir repeat_service
+    (fun i () json -> Lwt.return (`Ok (`A (repeat i json))))
+let dir =
+  register1 dir add_service
+    (fun i () j -> Lwt.return (`Ok (i+j)))
+let dir =
+  register2 dir alternate_add_service
+    (fun i j () () -> Lwt.return (`Ok (float_of_int i+.j)))
+let dir =
+  register dir alternate_add_service'
+    (fun (i,j) () () -> Lwt.return (`Ok (i+j)))
+let dir =
+  register dir dummy_service
+    (fun ((((((((),_a), _b), _c), _d), _e), _f), _g) () () -> Lwt.return (`Ok ()))
+
+let dir =
+  register_dynamic_directory1 dir prefix_dir1
+    (fun _ ->
+       let prefixed_dir = empty in
+       let prefixed_dir =
+         register2 prefixed_dir minus_service
+           (fun i j () () -> Lwt.return (`Ok (i -. float_of_int j))) in
+       Lwt.return prefixed_dir)
+
+let dir =
+  register_describe_directory_service
+    dir describe_service

vendors/ocplib-resto/test/ezDirectory.ml

@@ -0,0 +1,32 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open EzServices
+include EzRestoDirectory
+
+let rec repeat i json =
+  if i <= 0 then []
+  else json :: repeat (i-1) json
+
+let dir = empty let dir =
+                  register1 dir repeat_service
+                    (fun i () json -> Lwt.return (`Ok (`A (repeat i json))))
+let dir =
+  register1 dir add_service
+    (fun i () j -> Lwt.return (`Ok (i+j)))
+let dir =
+  register2 dir alternate_add_service
+    (fun i j () () -> Lwt.return (`Ok (float_of_int i+.j)))
+let dir =
+  register dir alternate_add_service'
+    (fun (i,j) () () -> Lwt.return (`Ok (i+j)))
+let dir =
+  register_describe_directory_service
+    dir describe_service

vendors/ocplib-resto/test/ezResto_test.ml

@@ -0,0 +1,91 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open EzServices
+open EzResto
+open EzDirectory
+open Lwt.Infix
+
+let () =
+  Lwt_main.run begin
+    allowed_methods dir ["foo";"3";"repeat"] >>= function
+    | Ok [`POST] -> Lwt.return_unit
+    | _ -> assert false
+  end
+
+let () =
+  Lwt_main.run begin
+    allowed_methods dir ["bar";"3";"4";"add"] >>= function
+    | Ok [`GET;`POST] -> Lwt.return_unit
+    | _ -> assert false
+  end
+
+module Test(Request : sig
+    val request:
+      ('meth, 'params, 'query, 'input, 'output, 'error) EzResto.service ->
+      'params  -> 'query -> 'input -> [> ('output, 'error) Answer.t ] Lwt.t
+  end) = struct
+
+  let () =
+    Lwt_main.run begin
+      Request.request describe_service ((), []) { Description.recurse = true } () >>= function
+      | `Ok dir ->
+          Format.printf "@[<v>%a@]@." Resto.Description.pp_print_directory dir ;
+          Lwt.return_unit
+      | _ -> assert false
+    end
+
+  let () =
+    let test service args arg expected =
+      Lwt_main.run (Request.request service args () arg) = `Ok expected in
+    assert (test repeat_service ((), 3) (`A []) (`A (repeat 3 (`A [])))) ;
+    assert (test add_service ((), 2) 3 5) ;
+    assert (test alternate_add_service (((), 1), 2.5) () 3.5) ;
+    assert (test alternate_add_service' (1, 2) () 3) ;
+    ()
+end
+
+
+module Faked = Test(struct
+    (** Testing faked client/server communication. *)
+    let request (type i) (service: (_,_,_,i,_,_) service) params query (arg: i) =
+      let { meth ; path ; query ; input } = forge_request service params query in
+      let uri =
+        Uri.make
+          ~path:(String.concat "/" path)
+          ~query:(List.map (fun (k,v) -> k, [v]) query) () in
+      Format.eprintf "\nREQUEST: %a@." Uri.pp_hum uri ;
+      let json =
+        match input with
+        | No_input -> `O []
+        | Input input -> Json_encoding.construct input arg in
+      lookup dir meth path >>= function
+      | Ok (Service s) -> begin
+          let query = Resto.Query.parse s.types.query query in
+          begin
+            match s.types.input with
+            | No_input -> s.handler query ()
+            | Input input ->
+                s.handler query @@ Json_encoding.destruct input json
+          end >>= function
+          | `Ok res ->
+              let json = Json_encoding.construct s.types.output res in
+              Lwt.return (`Ok (Json_encoding.destruct (output_encoding service) json))
+          | _ -> failwith "Unexpected lwt result (1)"
+        end
+      | _ -> failwith "Unexpected lwt result (2)"
+  end)
+
+module Transparent = Test(struct
+    let request x = transparent_lookup dir x
+  end)
+
+let () =
+  Printf.printf "\n### OK EzResto ###\n\n%!"

vendors/ocplib-resto/test/ezServices.ml

@@ -0,0 +1,58 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open EzResto
+
+(** Shared part *)
+
+let repeat_service =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.any_ezjson_value
+    ~output:Json_encoding.any_ezjson_value
+    ~error:Json_encoding.empty
+    Path.(root / "foo" /: Arg.int / "repeat")
+
+let add_service =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.int
+    ~output:Json_encoding.int
+    ~error:Json_encoding.empty
+    Path.(root / "foo" /: Arg.int / "add")
+
+let alternate_add_service =
+  get_service
+    ~query:Query.empty
+    ~output:Json_encoding.float
+    ~error:Json_encoding.empty
+    Path.(root / "bar" /: Arg.int /: Arg.float / "add")
+
+let alternate_add_service' =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.null
+    ~output:Json_encoding.int
+    ~error:Json_encoding.empty
+    Path.(map
+            (fun (((),i),f) -> (i,int_of_float f))
+            (fun (i,f) -> (((),i),float_of_int f))
+            (root / "bar" /: Arg.int /: Arg.float / "add"))
+
+let minus_service r =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.null
+    ~output:Json_encoding.float
+    ~error:Json_encoding.empty
+    Path.(r /: Arg.int / "minus")
+
+let describe_service =
+  description_service Path.(root / "describe")

vendors/ocplib-resto/test/jbuild

@@ -0,0 +1,24 @@
+(jbuild_version 1)
+
+(executable
+ ((name resto_test)
+  (modules (Services Directory Resto_test))
+  (libraries (ocplib-resto-directory ocplib-resto-json lwt.unix))))
+
+(alias
+((name runtest_resto)
+ (action (run ${path:resto_test.exe}))))
+
+(executable
+ ((name ezResto_test)
+  (modules (EzServices EzDirectory EzResto_test))
+  (libraries (ocplib-ezresto-directory lwt.unix))))
+
+(alias
+((name runtest_ezresto)
+ (action (run ${path:ezResto_test.exe}))))
+
+(alias
+((name runtest)
+ (deps ((alias runtest_resto)
+        (alias runtest_ezresto)))))

vendors/ocplib-resto/test/resto_test.ml

@@ -0,0 +1,112 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Services
+open Directory
+open RestoDirectory
+open Lwt.Infix
+
+let () =
+  Lwt_main.run begin
+    allowed_methods dir () ["foo";"3";"repeat"] >>= function
+    | Ok [`POST] -> Lwt.return_unit
+    | _ -> assert false
+  end
+
+let () =
+  Lwt_main.run begin
+    allowed_methods dir () ["bar";"3";"4";"add"] >>= function
+    | Ok [`GET;`POST] -> Lwt.return_unit
+    | _ -> assert false
+  end
+
+module Test(Request : sig
+    val request:
+      ('meth, unit, 'params, 'query, 'input, 'output, 'error) Service.t ->
+      'params  -> 'query -> 'input -> [> ('output, 'error) Answer.t ] Lwt.t
+  end) = struct
+
+  let () =
+    Lwt_main.run begin
+      Request.request describe_service
+        ((), ["foo"; "3"]) { recurse = true } () >>= function
+      | `Ok dir ->
+          Format.printf "@[<v>%a@]@." Resto.Description.pp_print_directory dir ;
+          Lwt.return_unit
+      | _ -> assert false
+    end
+
+  let () =
+    Lwt_main.run begin
+      Request.request describe_service
+        ((), ["bar"; "3" ; "2." ; "add"]) { recurse = false } () >>= function
+      | `Ok dir ->
+          Format.printf "@[<v>%a@]@." Resto.Description.pp_print_directory dir ;
+          Lwt.return_unit ;
+      | _ -> assert false
+    end
+
+  let () =
+    Lwt_main.run begin
+      Request.request describe_service ((), []) { recurse = true } () >>= function
+      | `Ok dir ->
+          Format.printf "@[<v>%a@]@." Resto.Description.pp_print_directory dir ;
+          Lwt.return_unit ;
+      | _ -> assert false
+    end
+
+  let () =
+    let test service args arg expected =
+      Lwt_main.run (Request.request service args () arg) = (`Ok expected) in
+    assert (test repeat_service ((), 3) (`A []) (`A (repeat 3 (`A [])))) ;
+    assert (test add_service ((), 2) 3 5) ;
+    assert (test alternate_add_service (((), 1), 2.5) () 3.5) ;
+    assert (test real_minus_service1 (((), 2.5), 1) () 1.5) ;
+    assert (test alternate_add_service' (1, 2) () 3) ;
+    ()
+
+end
+
+module Faked = Test(struct
+    (** Testing faked client/server communication. *)
+    let request (type i) (service: (_,_,_,_,i,_,_) Service.t) params query arg =
+      let { Service.meth ; path ; query ; input } = Service.forge_request service params query in
+      let uri =
+        Uri.make
+          ~path:(String.concat "/" path)
+          ~query:(List.map (fun (k,v) -> k, [v]) query) () in
+      Format.eprintf "\nREQUEST: %a@." Uri.pp_hum uri ;
+      let json =
+        match input with
+        | Service.No_input -> `O []
+        | Service.Input input -> Json_encoding.construct input arg in
+      lookup dir () meth path >>= function
+      | Ok (Service s) -> begin
+          let query = Resto.Query.parse s.types.query query in
+          begin
+            match s.types.input with
+            | Service.No_input -> s.handler query ()
+            | Service.Input input ->
+                s.handler query @@ Json_encoding.destruct input json
+          end >>= function
+          | `Ok res ->
+              let json = Json_encoding.construct s.types.output res in
+              Lwt.return (`Ok (Json_encoding.destruct (Service.output_encoding service) json))
+          | _ -> failwith "Unexpected lwt result (1)"
+        end
+      | _ -> failwith "Unexpected lwt result (2)"
+  end)
+
+module Transparent = Test(struct
+    let request x = transparent_lookup dir x
+  end)
+
+let () =
+  Printf.printf "\n### OK Resto ###\n\n%!"

vendors/ocplib-resto/test/services.ml

@@ -0,0 +1,78 @@
+(**************************************************************************)
+(*  ocplib-resto                                                          *)
+(*  Copyright (C) 2016, OCamlPro.                                         *)
+(*                                                                        *)
+(*    All rights reserved.  This file is distributed under the terms      *)
+(*    of the GNU Lesser General Public License version 2.1, with the      *)
+(*    special exception on linking described in the file LICENSE.         *)
+(*                                                                        *)
+(**************************************************************************)
+
+open Resto
+module Service = MakeService(RestoJson.Encoding)
+open Service
+
+(** Shared part *)
+
+let repeat_service =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.any_ezjson_value
+    ~output:Json_encoding.any_ezjson_value
+    ~error:Json_encoding.empty
+    Path.(root / "foo" /: Arg.int / "repeat")
+
+let add_service =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.int
+    ~output:Json_encoding.int
+    ~error:Json_encoding.empty
+    Path.(root / "foo" /: Arg.int / "add")
+
+let alternate_add_service =
+  get_service
+    ~query:Query.empty
+    ~output:Json_encoding.float
+    ~error:Json_encoding.empty
+    Path.(root / "bar" /: Arg.int /: Arg.float / "add")
+
+let alternate_add_service' =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.null
+    ~output:Json_encoding.int
+    ~error:Json_encoding.empty
+    Path.(map
+            (fun (((),i),f) -> (i,int_of_float f))
+            (fun (i,f) -> (((),i),float_of_int f))
+            (root / "bar" /: Arg.int /: Arg.float / "add"))
+
+let minus_service =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.null
+    ~output:Json_encoding.float
+    ~error:Json_encoding.empty
+    Path.(open_root /: Arg.int / "minus")
+
+let describe_service =
+  description_service Path.(root / "describe")
+
+let dummy_service =
+  post_service
+    ~query:Query.empty
+    ~input:Json_encoding.null
+    ~output:Json_encoding.null
+    ~error:Json_encoding.empty
+    Path.(root / "a" / "path" / "long" / "enough" /
+          "for" / "<hov>" / "to" / "trigger"
+          /: Arg.float /: Arg.float /: Arg.float /: Arg.float
+          /: Arg.float /: Arg.float /: Arg.float)
+
+let prefix_dir1 = Path.(root / "tartine" /: Arg.float / "chaussure")
+
+
+(** Client only *)
+
+let real_minus_service1 = Service.prefix prefix_dir1 minus_service