package rpclib
A library to deal with RPCs in OCaml
Install
Dune Dependency
Authors
Maintainers
Sources
rpclib-9.0.0.tbz
sha256=ce23eb756c028d9374bd19823296bddb7c237d3f055452d30d1cf7d15216e963
sha512=d4dfd7a9ee1b7996c24819ac1895925af0ad732f117c6e06cd28c215b14aa094dbd045e44d7f84c0eeb7ab807ed970d6879c29d07b02377fcb928325124ba7f6
doc/src/rpclib.core/rpc.ml.html
Source file rpc.ml
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(* * Copyright (c) 2006-2009 Citrix Systems Inc. * Copyright (c) 2006-2014 Thomas Gazagnaire <thomas@gazagnaire.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *) let debug = ref false let set_debug x = debug := x let get_debug () = !debug type t = | Int of int64 | Int32 of int32 | Bool of bool | Float of float | String of string | DateTime of string | Enum of t list | Dict of (string * t) list | Base64 of string | Null module Version = struct type t = int * int * int let compare (x, y, z) (x', y', z') = let cmp a b fn () = let c = compare a b in if c <> 0 then c else fn () in cmp x x' (cmp y y' (cmp z z' (fun () -> 0))) () end module Types = struct type _ basic = | Int : int basic | Int32 : int32 basic | Int64 : int64 basic | Bool : bool basic | Float : float basic | String : string basic | Char : char basic type _ typ = | Basic : 'a basic -> 'a typ | DateTime : string typ | Base64 : string typ | Array : 'a typ -> 'a array typ | List : 'a typ -> 'a list typ | Dict : 'a basic * 'b typ -> ('a * 'b) list typ | Unit : unit typ | Option : 'a typ -> 'a option typ | Tuple : 'a typ * 'b typ -> ('a * 'b) typ | Tuple3 : 'a typ * 'b typ * 'c typ -> ('a * 'b * 'c) typ | Tuple4 : 'a typ * 'b typ * 'c typ * 'd typ -> ('a * 'b * 'c * 'd) typ | Struct : 'a structure -> 'a typ | Variant : 'a variant -> 'a typ | Abstract : 'a abstract -> 'a typ (* A type definition has a name and description *) and 'a def = { name : string ; description : string list ; ty : 'a typ } and boxed_def = BoxedDef : 'a def -> boxed_def and ('a, 's) field = { fname : string ; fdescription : string list ; fversion : Version.t option ; field : 'a typ ; fdefault : 'a option ; fget : 's -> 'a ; (* Lenses *) fset : 'a -> 's -> 's } and 'a boxed_field = BoxedField : ('a, 's) field -> 's boxed_field and field_getter = { field_get : 'a. string -> 'a typ -> ('a, Rresult.R.msg) Result.t } and 'a structure = { sname : string ; fields : 'a boxed_field list ; version : Version.t option ; constructor : field_getter -> ('a, Rresult.R.msg) Result.t } and ('a, 's) tag = { tname : string ; tdescription : string list ; tversion : Version.t option ; tcontents : 'a typ ; tpreview : 's -> 'a option ; treview : 'a -> 's } and 'a boxed_tag = BoxedTag : ('a, 's) tag -> 's boxed_tag and tag_getter = { tget : 'a. 'a typ -> ('a, Rresult.R.msg) Result.t } and 'a variant = { vname : string ; variants : 'a boxed_tag list ; vdefault : 'a option ; vversion : Version.t option ; vconstructor : string -> tag_getter -> ('a, Rresult.R.msg) Result.t } and 'a abstract = { aname : string ; test_data : 'a list ; rpc_of : 'a -> t ; of_rpc : t -> ('a, Rresult.R.msg) Result.t } let int = { name = "int"; ty = Basic Int; description = [ "Native integer" ] } let int32 = { name = "int32"; ty = Basic Int32; description = [ "32-bit integer" ] } let int64 = { name = "int64"; ty = Basic Int64; description = [ "64-bit integer" ] } let bool = { name = "bool"; ty = Basic Bool; description = [ "Boolean" ] } let float = { name = "float"; ty = Basic Float; description = [ "Floating-point number" ] } let string = { name = "string"; ty = Basic String; description = [ "String" ] } let char = { name = "char"; ty = Basic Char; description = [ "Char" ] } let unit = { name = "unit"; ty = Unit; description = [ "Unit" ] } let default_types = [ BoxedDef int ; BoxedDef int32 ; BoxedDef int64 ; BoxedDef bool ; BoxedDef float ; BoxedDef string ; BoxedDef char ; BoxedDef unit ] end exception Runtime_error of string * t exception Runtime_exception of string * string let map_strings sep fn l = String.concat sep (List.map fn l) let rec to_string t = let open Printf in match t with | Int i -> sprintf "I(%Li)" i | Int32 i -> sprintf "I32(%li)" i | Bool b -> sprintf "B(%b)" b | Float f -> sprintf "F(%g)" f | String s -> sprintf "S(%s)" s | DateTime s -> sprintf "D(%s)" s | Enum ts -> sprintf "[%s]" (map_strings ";" to_string ts) | Dict ts -> sprintf "{%s}" (map_strings ";" (fun (s, t) -> sprintf "%s:%s" s (to_string t)) ts) | Base64 s -> sprintf "B64(%s)" s | Null -> "N" let rpc_of_t x = x let rpc_of_int64 i = Int i let rpc_of_int32 i = Int (Int64.of_int32 i) let rpc_of_int i = Int (Int64.of_int i) let rpc_of_bool b = Bool b let rpc_of_float f = Float f let rpc_of_string s = String s let rpc_of_dateTime s = DateTime s let rpc_of_base64 s = Base64 s let rpc_of_unit () = Null let rpc_of_char x = Int (Int64.of_int (Char.code x)) let int64_of_rpc = function | Int i -> i | String s -> Int64.of_string s | x -> failwith (Printf.sprintf "Expected int64, got '%s'" (to_string x)) let int32_of_rpc = function | Int i -> Int64.to_int32 i | String s -> Int32.of_string s | x -> failwith (Printf.sprintf "Expected int32, got '%s'" (to_string x)) let int_of_rpc = function | Int i -> Int64.to_int i | String s -> int_of_string s | x -> failwith (Printf.sprintf "Expected int, got '%s'" (to_string x)) let bool_of_rpc = function | Bool b -> b | x -> failwith (Printf.sprintf "Expected bool, got '%s'" (to_string x)) let float_of_rpc = function | Float f -> f | Int i -> Int64.to_float i | Int32 i -> Int32.to_float i | String s -> float_of_string s | x -> failwith (Printf.sprintf "Expected float, got '%s'" (to_string x)) let string_of_rpc = function | String s -> s | x -> failwith (Printf.sprintf "Expected string, got '%s'" (to_string x)) let dateTime_of_rpc = function | DateTime s -> s | x -> failwith (Printf.sprintf "Expected DateTime, got '%s'" (to_string x)) let base64_of_rpc = function | Base64 s -> Base64.decode_exn s | x -> failwith (Printf.sprintf "Expected base64, got '%s'" (to_string x)) let unit_of_rpc = function | Null -> () | x -> failwith (Printf.sprintf "Expected unit, got '%s'" (to_string x)) let char_of_rpc x = let x = int_of_rpc x in if x < 0 || x > 255 then failwith (Printf.sprintf "Char out of range (%d)" x) else Char.chr x let t_of_rpc t = t let lowerfn = function | String s -> String (String.lowercase_ascii s) | Enum (String s :: ss) -> Enum (String (String.lowercase_ascii s) :: ss) | x -> x module ResultUnmarshallers = struct open Rresult let int64_of_rpc = function | Int i -> R.ok i | String s -> (try R.ok (Int64.of_string s) with | _ -> R.error_msg (Printf.sprintf "Expected int64, got string '%s'" s)) | x -> R.error_msg (Printf.sprintf "Expected int64, got '%s'" (to_string x)) let int32_of_rpc = function | Int i -> R.ok (Int64.to_int32 i) | String s -> (try R.ok (Int32.of_string s) with | _ -> R.error_msg (Printf.sprintf "Expected int32, got string '%s'" s)) | x -> R.error_msg (Printf.sprintf "Expected int32, got '%s'" (to_string x)) let int_of_rpc = function | Int i -> R.ok (Int64.to_int i) | String s -> (try R.ok (int_of_string s) with | _ -> R.error_msg (Printf.sprintf "Expected int, got string '%s'" s)) | x -> R.error_msg (Printf.sprintf "Expected int, got '%s'" (to_string x)) let bool_of_rpc = function | Bool b -> R.ok b | x -> R.error_msg (Printf.sprintf "Expected bool, got '%s'" (to_string x)) let float_of_rpc = function | Float f -> R.ok f | Int i -> R.ok (Int64.to_float i) | Int32 i -> R.ok (Int32.to_float i) | String s -> (try R.ok (float_of_string s) with | _ -> R.error_msg (Printf.sprintf "Expected float, got string '%s'" s)) | x -> R.error_msg (Printf.sprintf "Expected float, got '%s'" (to_string x)) let string_of_rpc = function | String s -> R.ok s | x -> R.error_msg (Printf.sprintf "Expected string, got '%s'" (to_string x)) let dateTime_of_rpc = function | DateTime s -> R.ok s | x -> R.error_msg (Printf.sprintf "Expected DateTime, got '%s'" (to_string x)) let base64_of_rpc = function | Base64 s -> R.ok s | x -> R.error_msg (Printf.sprintf "Expected base64, got '%s'" (to_string x)) let unit_of_rpc = function | Null -> R.ok () | x -> R.error_msg (Printf.sprintf "Expected unit, got '%s'" (to_string x)) let char_of_rpc x = Rresult.R.bind (int_of_rpc x) (fun x -> if x < 0 || x > 255 then R.error_msg (Printf.sprintf "Char out of range (%d)" x) else R.ok (Char.chr x)) let t_of_rpc t = R.ok t end let struct_extend rpc default_rpc = match rpc, default_rpc with | Dict real, Dict default_fields -> Dict (List.fold_left (fun real (f, default) -> if List.mem_assoc f real then real else (f, default) :: real) real default_fields) | _, _ -> rpc type callback = string list -> t -> unit type call = { name : string ; params : t list ; is_notification : bool } let call name params = { name; params; is_notification = false } let notification name params = { name; params; is_notification = true } let string_of_call call = Printf.sprintf "-> %s(%s)" call.name (String.concat "," (List.map to_string call.params)) type response = { success : bool ; contents : t ; is_notification : bool } let string_of_response response = Printf.sprintf "<- %s(%s)" (if response.success then "success" else "failure") (to_string response.contents) (* is_notification is to be set as true only if the call was a notification *) let success v = { success = true; contents = v; is_notification = false } let failure v = { success = false; contents = v; is_notification = false }
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