85 lines
3.1 KiB
OCaml
85 lines
3.1 KiB
OCaml
(* MTE - the MirageOS Taler Exchange
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Copyright (C) 2025 Olivier Pierre <swrup@protonmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, version 3.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. *)
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module Static = struct
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(* /terms + /privacy
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- try to find a response with an acceptable mime-type,
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- then pick the version in the most preferred language of the user,
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- and finally apply compression if that is allowed by the client
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- set ETAG header
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TODO:
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- subsequent requests of the client should provide the tag in an "If-None-Match" header
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to detect if the terms of service have changed
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- If it did not change, a "304 Not Modified" response will be returned
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- The ETAG is encoded in Crockford base-32
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- A "Taler-Terms-Version" header is generated to indicate the legal version of the terms
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- When returning a full response (not a "304 Not Modified"), the server
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should also include a "Avail-Languages" header which includes a
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comma-separated list of the languages in which the terms of service are available in
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*)
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let select_file headers kind =
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let open Syntax in
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let* ext =
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Option.to_result ~none:"no acceptable mimetype"
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(Headers.select_extension headers)
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in
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let* lang =
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Option.to_result ~none:"no acceptable language"
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(Headers.select_language headers)
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in
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let content = Assets.get_content ~lang ~ext kind in
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content
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(* TODO add headers, handle errors etc
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think on how to (not) mix error and vif monade well *)
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let static kind req _server _env =
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let open Vif.Response.Syntax in
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let headers = Vif.Request.headers req in
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(* TODO(etag) *)
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let _if_none_match = Vif.Headers.get headers "if-none-match" in
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let data =
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match select_file headers kind with
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| Error e -> Fmt.failwith "%s" e
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| Ok content -> content
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in
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let compression = Headers.select_encoding headers in
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let* () = Vif.Response.with_string ?compression req data in
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(* TODO(etag) *)
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let* () = Vif.Response.add ~field:"etag" (Assets.etag kind) in
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(* TODO content-type *)
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let* () = Vif.Response.add ~field:"content-type" "html; charset=utf-8" in
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Vif.Response.respond `OK
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let terms = static Assets.Terms
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let privacy = static Assets.Privacy
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end
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let routes =
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let open Vif.Uri in
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let open Vif.Route in
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(*let open Vif.Type in*)
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[
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get (rel / "terms" /?? nil) --> Static.terms
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; get (rel / "privacy" /?? nil) --> Static.privacy
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]
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let () =
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Miou_unix.run @@ fun () ->
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let env = () in
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let middlewares = Vif.Middlewares.[] in
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Vif.run ~middlewares routes env
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