Source file sqlite3_backend.ml
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exception Exception of string
let get_or_exn m = m |> CCResult.get_or_failwith |> Lwt.return
(** TODO: optional [ctx] arguments are ignored by sqlite backend *)
module Make (A : Guardian.RoleSig) (T : Guardian.RoleSig) = struct
module Guardian = Guardian.Make (A) (T)
module Uuid = Guardian.Uuid
(** TODO: generalize this. right now it's fine because this backend should
really only be used for testing purposes, but in the future it would be
nice to have actual sqlite3 support. *)
module ActorSet = Guardian.ActorRoleSet
module TargetSet = Guardian.TargetRoleSet
let db = Sqlite3.db_open "test_db.sqlite3"
module Backend = struct
type 'a authorizable = 'a Guardian.Authorizable.t
type 'b authorizable_target = 'b Guardian.AuthorizableTarget.t
type role = A.t
type auth_rule = Guardian.Authorizer.auth_rule
type actor_role_set = Guardian.ActorRoleSet.t
type actor_spec = Guardian.Authorizer.Actor.spec
type target_role_set = Guardian.TargetRoleSet.t
type target_spec = Guardian.Authorizer.Target.spec
type ('rv, 'err) monad = ('rv, 'err) Lwt_result.t
let lwt_return_rc = function
| Sqlite3.Rc.OK | DONE | ROW -> Lwt.return_ok ()
| rc -> Lwt.return_error (Sqlite3.Rc.to_string rc)
;;
module Actor = struct
module Authorizable = struct
let create ?ctx ?(owner : Uuid.Actor.t option) roles id
: (unit, string) Lwt_result.t
=
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let stmt =
prepare
db
{sql|INSERT INTO guardian_actors (id, roles, parent) VALUES (?, ?, ?)|sql}
in
let roles' = roles |> ActorSet.to_yojson |> Yojson.Safe.to_string in
let* () =
bind_values
stmt
[ Data.TEXT (Uuid.Actor.to_string id)
; Data.TEXT roles'
; Data.opt_text (CCOption.map Uuid.Actor.to_string owner)
]
|> lwt_return_rc
in
lwt_return_rc (step stmt)
;;
let mem ?ctx id =
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let stmt =
prepare db {sql|SELECT * FROM guardian_actors WHERE id = ?|sql}
in
let (_ : Rc.t) =
bind_values stmt [ Data.TEXT (Uuid.Actor.to_string id) ]
in
let (_ : Rc.t), rv =
fold stmt ~f:(fun _acc _row -> Some true) ~init:None
in
rv |> CCOption.get_or ~default:false |> Lwt.return_ok
;;
end
let find ?ctx typ id =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Actor.to_string id in
let stmt =
prepare
db
{sql|SELECT roles, parent FROM guardian_actors WHERE id = ?|sql}
in
let (_ : Rc.t) = bind_values stmt [ Data.TEXT id' ] in
let* () = lwt_return_rc (step stmt) in
let roles =
column_text stmt 0
|> Yojson.Safe.from_string
|> ActorSet.of_yojson
|> CCResult.get_or_failwith
in
let owner = column_text stmt 1 |> Uuid.Actor.of_string in
Guardian.Authorizable.make ?owner roles typ id |> Lwt.return_ok
;;
let find_roles ?ctx id =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Actor.to_string id in
let stmt =
prepare db {sql|SELECT roles FROM guardian_actors WHERE id = ?|sql}
in
let (_ : Rc.t) = bind_values stmt [ Data.TEXT id' ] in
let* () = lwt_return_rc (step stmt) in
match CCString.trim (column_text stmt 0) with
| "" -> Lwt.return_ok ActorSet.empty
| coltext ->
Yojson.Safe.from_string coltext |> ActorSet.of_yojson |> Lwt.return
;;
let find_owner ?ctx id =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Actor.to_string id in
let stmt =
prepare db {sql|SELECT parent FROM guardian_actors WHERE id = ?|sql}
in
let* () =
let (_ : Rc.t) = bind_values stmt [ Data.TEXT id' ] in
lwt_return_rc (step stmt)
in
let raw = column_text stmt 0 in
match Uuid.Actor.of_string raw with
| Some uuid -> Lwt.return_ok (Some uuid)
| None -> Lwt.return_ok None
;;
let save_rule ?ctx ((actor, action, target) : auth_rule) =
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let action' = Guardian.Action.to_string action in
let stmt =
match actor, target with
| `Actor aid, `Target tid ->
let stmt =
{sql|
INSERT INTO guardian_rules (actor_id, act, target_id)
VALUES (?, ?, ?)
|sql}
|> prepare db
in
let _ =
bind_values
stmt
Data.
[ TEXT (Uuid.Actor.to_string aid)
; TEXT action'
; TEXT (Uuid.Target.to_string tid)
]
in
stmt
| `Actor aid, `TargetEntity trole ->
let stmt =
{sql|
INSERT INTO guardian_rules (actor_id, act, target_role)
VALUES (?, ?, ?)
|sql}
|> prepare db
in
let _ =
bind_values
stmt
Data.
[ TEXT (Uuid.Actor.to_string aid)
; TEXT action'
; TEXT (T.show trole)
]
in
stmt
| `ActorEntity arole, `Target tid ->
let stmt =
{sql|
INSERT INTO guardian_rules (actor_role, act, target_id)
VALUES (?, ?, ?)
|sql}
|> prepare db
in
let _ =
bind_values
stmt
Data.
[ TEXT (A.show arole)
; TEXT action'
; TEXT (Uuid.Target.to_string tid)
]
in
stmt
| `ActorEntity arole, `TargetEntity trole ->
let stmt =
{sql|
INSERT INTO guardian_rules (actor_role, act, target_role)
VALUES (?, ?, ?)
|sql}
|> prepare db
in
let _ =
bind_values
stmt
Data.[ TEXT (A.show arole); TEXT action'; TEXT (T.show trole) ]
in
stmt
in
lwt_return_rc (step stmt)
;;
let delete_rule
?ctx
((actor, action, target) : Guardian.Authorizer.auth_rule)
=
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
match actor, target with
| `Actor aid, `Target tid ->
let stmt =
{sql|
DELETE FROM guardian_rules WHERE actor_id = ? AND act = ? AND target_id = ?
|sql}
in
let stmt = prepare db stmt in
let* () =
lwt_return_rc
(bind_values
stmt
Data.
[ TEXT (Uuid.Actor.to_string aid)
; TEXT (Guardian.Action.to_string action)
; TEXT (Uuid.Target.to_string tid)
])
in
lwt_return_rc (step stmt)
| `Actor aid, `TargetEntity trole ->
let stmt =
{sql|
DELETE FROM guardian_rules WHERE actor_id = ? AND act = ? AND target_role = ?
|sql}
in
let stmt = prepare db stmt in
let* () =
lwt_return_rc
(bind_values
stmt
Data.
[ TEXT (Uuid.Actor.to_string aid)
; TEXT (Guardian.Action.to_string action)
; TEXT (T.show trole)
])
in
lwt_return_rc (step stmt)
| `ActorEntity arole, `Target tid ->
let stmt =
{sql|
DELETE FROM guardian_rules WHERE actor_role = ? AND act = ? AND target_id = ?
|sql}
in
let stmt = prepare db stmt in
let* () =
lwt_return_rc
(bind_values
stmt
Data.
[ TEXT (A.show arole)
; TEXT (Guardian.Action.to_string action)
; TEXT (Uuid.Target.to_string tid)
])
in
lwt_return_rc (step stmt)
| `ActorEntity arole, `TargetEntity trole ->
let stmt =
{sql|
DELETE FROM guardian_rules WHERE actor_role = ? AND act = ? AND target_role = ?
|sql}
in
let stmt = prepare db stmt in
let* () =
lwt_return_rc
(bind_values
stmt
Data.
[ TEXT (A.show arole)
; TEXT (Guardian.Action.to_string action)
; TEXT (T.show trole)
])
in
lwt_return_rc (step stmt)
;;
let find_rules ?ctx (spec : target_spec) =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let* stmt =
match spec with
| `Target tid ->
let stmt =
{sql|
SELECT act, actor_id, actor_role FROM guardian_rules WHERE target_id = ?
|sql}
|> prepare db
in
let* () =
lwt_return_rc
(bind_values stmt [ Data.TEXT (Uuid.Target.to_string tid) ])
in
Lwt.return_ok stmt
| `TargetEntity role ->
let stmt =
{sql|
SELECT act, actor_id, actor_role FROM guardian_rules WHERE target_role = ?
|sql}
|> prepare db
in
let () = Printf.printf "Searching for role: %s\n" (T.show role) in
let* () =
lwt_return_rc (bind_values stmt [ Data.TEXT (T.show role) ])
in
Lwt.return_ok stmt
in
let rc, rv =
fold
stmt
~f:(fun acc row ->
let action =
row.(0) |> Data.to_string_exn |> Guardian.Action.of_string
in
let (actor : Guardian.Authorizer.Actor.spec) =
match Data.(to_string row.(1), to_string row.(2)) with
| Some actor_id, None ->
`Actor
(Uuid.Actor.of_string actor_id
|> CCOption.get_exn_or "Malformatted UUID!")
| None, Some actor_role -> `ActorEntity (A.of_string actor_role)
| _ -> raise (Invalid_argument "Invalid actor spec")
in
let x : Guardian.Authorizer.auth_rule = actor, action, spec in
x :: acc)
~init:[]
in
let* () = lwt_return_rc rc in
Lwt.return_ok rv
;;
let grant_roles ?ctx id roles =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Actor.to_string id in
let* roles' =
let* pre_roles = find_roles id in
ActorSet.union pre_roles roles
|> ActorSet.to_yojson
|> Yojson.Safe.to_string
|> Lwt.return_ok
in
let* stmt =
let* mem = Authorizable.mem ?ctx id in
if mem
then
Lwt.return_ok
(prepare
db
{sql|UPDATE guardian_actors SET roles = ? WHERE id = ?|sql})
else
Lwt.return_error
"Cannot grant a role to an authorizable which doesn't exist."
in
let () = ignore (bind_values stmt Data.[ TEXT roles'; TEXT id' ]) in
lwt_return_rc (step stmt)
;;
let revoke_roles ?ctx id roles =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Actor.to_string id in
let* roles' =
let* pre_roles = find_roles id in
ActorSet.diff pre_roles roles
|> ActorSet.to_yojson
|> Yojson.Safe.to_string
|> Lwt.return_ok
in
let* stmt =
let* mem = Authorizable.mem ?ctx id in
if mem
then
Lwt.return_ok
(prepare
db
{sql|UPDATE guardian_actors SET roles = ? WHERE id = ?|sql})
else
Lwt.return_error
"Cannot grant a role to an authorizable which doesn't exist."
in
let () = ignore (bind_values stmt Data.[ TEXT roles'; TEXT id' ]) in
lwt_return_rc (step stmt)
;;
let save_owner ?ctx ?owner id =
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Actor.to_string id in
let owner' = owner |> CCOption.map Uuid.Actor.to_string in
let stmt =
prepare
db
{sql|UPDATE guardian_actors SET parent = ? WHERE id = ?|sql}
in
let () = ignore (bind_values stmt Data.[ opt_text owner'; TEXT id' ]) in
lwt_return_rc (step stmt)
;;
end
module Target = struct
module Authorizable = struct
let create ?ctx ?owner roles id =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let stmt =
prepare
db
{sql|INSERT INTO guardian_targets (id, roles, parent) VALUES (?, ?, ?)|sql}
in
let roles' =
Guardian.TargetRoleSet.to_yojson roles |> Yojson.Safe.to_string
in
let* () =
bind_values
stmt
[ Data.TEXT (Uuid.Target.to_string id)
; Data.TEXT roles'
; Data.opt_text (owner |> CCOption.map Uuid.Actor.to_string)
]
|> lwt_return_rc
in
lwt_return_rc (step stmt)
;;
let mem ?ctx id =
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let stmt =
prepare db {sql|SELECT * FROM guardian_targets WHERE id = ?|sql}
in
let (_ : Rc.t) =
bind_values stmt [ Data.TEXT (Uuid.Target.to_string id) ]
in
let (_ : Rc.t), rv =
fold stmt ~f:(fun _acc _row -> Some true) ~init:None
in
rv |> CCOption.get_or ~default:false |> Lwt.return_ok
;;
end
let find ?ctx typ id =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Target.to_string id in
let stmt =
prepare
db
{sql|SELECT roles, parent FROM guardian_targets WHERE id = ?|sql}
in
let (_ : Rc.t) = bind_values stmt [ Data.TEXT id' ] in
let* () = lwt_return_rc (step stmt) in
let entity =
column_text stmt 0
|> Yojson.Safe.from_string
|> TargetSet.of_yojson
|> CCResult.get_or_failwith
in
let owner = column_text stmt 1 |> Uuid.Actor.of_string in
Guardian.AuthorizableTarget.make ?owner entity typ id |> Lwt.return_ok
;;
let find_roles ?ctx (id : Uuid.Target.t) =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Target.to_string id in
let stmt =
prepare db {sql|SELECT roles FROM guardian_targets WHERE id = ?|sql}
in
let (_ : Rc.t) = bind_values stmt [ Data.TEXT id' ] in
let* () = lwt_return_rc (step stmt) in
match CCString.trim (column_text stmt 0) with
| "" -> Lwt.return_ok Guardian.TargetRoleSet.empty
| coltext ->
Yojson.Safe.from_string coltext
|> Guardian.TargetRoleSet.of_yojson
|> Lwt.return
;;
let find_owner ?ctx id =
let open Lwt_result.Syntax in
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Target.to_string id in
let stmt =
prepare db {sql|SELECT parent FROM guardian_targets WHERE id = ?|sql}
in
let* () =
let (_ : Rc.t) = bind_values stmt [ Data.TEXT id' ] in
lwt_return_rc (step stmt)
in
let raw = column_text stmt 0 in
match Uuid.Actor.of_string raw with
| Some uuid -> Lwt.return_ok (Some uuid)
| None -> Lwt.return_ok None
;;
let save_owner ?ctx ?owner id =
let open Sqlite3 in
let (_ : (string * string) list option) = ctx in
let id' = Uuid.Target.to_string id in
let owner' = owner |> CCOption.map Uuid.Actor.to_string in
let stmt =
prepare
db
{sql|UPDATE guardian_targets SET parent = ? WHERE id = ?|sql}
in
let () = ignore (bind_values stmt Data.[ opt_text owner'; TEXT id' ]) in
lwt_return_rc (step stmt)
;;
end
(** [find_migrations ()] returns a list of all migrations as a tuple with
key, datetime and sql query **)
let find_migrations () = Migrations.all
(** [find_clean ()] returns a list of all migrations as a tuple with key and
sql query **)
let find_clean () =
Migrations.all_tables
|> CCList.map (fun m -> m, Format.asprintf "DELETE FROM %s" m)
;;
(** [migrate ()] runs all migration on a specified context [?ctx] **)
let migrate ?ctx () =
let (_ : (string * string) list option) = ctx in
()
|> find_migrations
|> Lwt_list.iter_s (fun (key, date, sql) ->
let open Sqlite3 in
let open Lwt.Infix in
Logs.debug (fun m -> m "Migration: Run '%s' from '%s'" key date);
sql |> prepare db |> step |> lwt_return_rc >>= get_or_exn)
;;
(** [clean ()] runs clean on a specified context [?ctx] **)
let clean ?ctx () =
let (_ : (string * string) list option) = ctx in
()
|> find_clean
|> Lwt_list.iter_s (fun (key, sql) ->
let open Sqlite3 in
let open Lwt.Infix in
Logs.debug (fun m -> m "Clean: Run '%s'" key);
sql |> prepare db |> step |> lwt_return_rc >>= get_or_exn)
;;
end
include Guardian.Make_persistence (Backend)
end