(* COCANWIKI - a wiki written in Objective CAML.
 * Written by Richard W.M. Jones <rich@merjis.com>.
 * Copyright (C) 2004 Merjis Ltd.
 * $Id: cocanwiki_cgi_args.ml,v 1.1 2004/09/24 10:44:55 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 badly needs to become a standard part of the Cgi library.
 *)

let split1_re = Pcre.regexp "\\?"
let split2_re = Pcre.regexp "&"
let split3_re = Pcre.regexp "="

let parse full_url =
  let url, qs = match Pcre.split ~rex:split1_re ~max:2 full_url with
    | [url] | [url;""] -> url, None
    | [url;qs] -> url, Some qs
    | _ -> assert false in
  let args = match qs with
      None -> []
    | Some qs ->
	let args = Pcre.split ~rex:split2_re qs in
	let f arg =
	  match Pcre.split ~rex:split3_re ~max:2 arg with
	    | [] -> ("", "")
	    | [key] -> (key, "")
	    | [key;value] -> (key, value)
	    | _ -> assert false
	in
	List.map f args in
  url, qs, args