(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: crash.ml,v 1.6 2006/07/31 09:49:42 rich Exp $
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * This script handles 500 errors through the ErrorDocument mechanism.
 *)

open Apache
open Registry
open Cgi
open Printf

open Cocanwiki
open Cocanwiki_template
open Cocanwiki_server_settings

let run r (q : cgi) dbh hostid
    { canonical_hostname = canonical_hostname } _ =
  let template = get_template dbh hostid "crash.html" in
  let crash_email = server_settings_crash_email dbh in

  (* Get the current time and write it into the logs. *)
  let time = Calendar.now () in
  let time = Printer.CalendarPrinter.to_string time in
  prerr_endline ("crash: " ^ time);

  (* Send a feedback email to the designated address if
   * server_settings.crash_email is set.
   *)
  let mail_sent =
    match crash_email with
    | None -> false
    | Some email ->
	let subject =
	  "Crash notify: There was a 500 internal server error" in
	let body = "Crash at " ^ time ^ "\n" ^
	  "Hostname is " ^ canonical_hostname ^ "\n" ^
	  "Please see the error log for details." in

	let to_addrs = ["", email] in
	let content_type =
	  "text/plain", ["charset", Mimestring.mk_param "UTF-8"] in

	let msg =
	  Netsendmail.compose ~subject ~to_addrs ~content_type body in
	Netsendmail.sendmail msg;

	true in

  template#conditional "mail_sent" mail_sent;

  q#template template

let () =
  register_script run