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(*
* Copyright (C) 2020 Alban Gruin
*
* ucs is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* ucs is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with ucs. If not, see <http://www.gnu.org/licenses/>.
*)
open CalendarLib
open Lwt
open Cohttp
open Cohttp_lwt_unix
let format_date = Printer.Date.sprint "%Y-%m-%d" and
a_month = Date.Period.make 0 1 0 and
a_year = Date.Period.make 1 0 0
let fetch celcat_url group =
let current_date = Date.today () in
let lower_date = format_date @@ Date.rem current_date a_month and
upper_date = format_date @@ Date.add current_date a_year in
let parameters = Uri.encoded_of_query
["start", [lower_date]; "end", [upper_date];
"resType", ["103"]; "calView", ["month"];
"federationIds[]", [group]; "colourScheme", ["3"]] in
let body = Cohttp_lwt.Body.of_string parameters and
headers = Header.init_with "Content-Type" "application/x-www-form-urlencoded" in
Client.post ~body ~headers celcat_url
>>= fun (_resp, body) ->
Cohttp_lwt.Body.to_string body
let log uri =
let datetime =
Printer.Calendar.sprint "%Y-%m-%d %H:%M:%S" @@ Calendar.now () in
Lwt_io.printlf "[%s] %s" datetime (Uri.path_and_query uri)
let respond ?(mime="text/html; charset=utf-8") ?(status=`OK) body =
let headers = Header.init_with "Content-Type" mime in
Server.respond_string ~status ~body ~headers ()
let get_tz () =
Lwt_unix.file_exists "/etc/timezone" >>= fun exists ->
if exists then
Lwt_io.(open_file ~mode:Input "/etc/timezone") >>= fun file ->
Lwt.finalize
(fun () ->
Lwt_io.read file >|=
String.trim)
(fun () -> Lwt_io.close file)
else
Lwt.return ""
let serve base_url celcat_url mode stop =
get_tz () >>= fun tzname ->
let fetch = fetch celcat_url in
let callback _conn req _body =
let meth = Request.meth req and
uri = Request.uri req in
let path = Uri.path uri
|> Astring.String.cuts ~empty:false ~sep:"/"
|> List.map Uri.pct_decode and
query = Uri.query uri in
log uri >>= fun () ->
match meth, path, query with
| `GET, ([] | ["index.html"]), [] -> respond Pages.main
| `GET, ["lnk"], ["group", [group]] ->
let lnk = base_url ^ "/ics/" ^ group ^ ".ics" in
respond @@ Pages.link lnk
| `GET, ["lnk"], _ ->
Server.respond_string ~status:`Bad_request ~body:"Bad request\n" ()
| `GET, ["ics"; file], [] when Astring.String.is_suffix ~affix:".ics" file ->
let group = String.(sub file 0 (length file - 4)) in
fetch group >>= fun body ->
Course.decode body
|> Ics.to_string tzname
|> respond ~mime:"text/calendar; charset=utf-8"
| `GET, _, _ ->
Server.respond_string ~status:`Not_found ~body:"Not found\n" ()
| _ ->
Server.respond_string
~status:`Method_not_allowed ~body:"Method not allowed\n" () in
Server.create ~stop ~mode (Server.make ~callback ())
|
