(* COCANWIKI scripts.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: file.ml,v 1.3 2004/09/07 14:58:34 rich Exp $
 *)

open Apache
open Registry
open Cgi
open Printf

open Cocanwiki

let run r (q : cgi) (dbh : Dbi.connection) (hostid, _, _) _ =
  let name = q#param "name" in
  let version =
    try Some (int_of_string (q#param "version")) with Not_found -> None in

  (* Get the file and its MIME type. *)
  let where, args =
    match version with
	None -> "hostid = ? and name = ?", [`Int hostid; `String name]
      | Some version ->
	  "hostid = ? and (name = ? or name_deleted = ?) and id = ?",
	  [`Int hostid; `String name; `String name; `Int version] in

  let sth =
    dbh#prepare_cached ("select content, mime_type from files
                          where " ^ where) in
  sth#execute args;

  let data, mime_type =
    match sth#fetch1 () with
	[ `Binary data; `String mime_type ] ->
	  data, mime_type
      | _ -> assert false in

  if version <> None then
    (* Set a medium-length expiry time on this resource. *)
    Table.set (Request.headers_out r) "Expires" (Cgi_expires.expires_medium());

  q#header ~content_type:mime_type ();
  print_string r data

let () =
  register_script run