(*
  OCaml HTTP - do it yourself (fully OCaml) HTTP daemon

  Copyright (C) <2002> Stefano Zacchiroli <zack@cs.unibo.it>

  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; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*)

open Http_types;;
open Printf;;

let wget addr port path =
  let rec wget' inchan buf =
    Buffer.add_string buf (input_line inchan ^ "\n");
    wget' inchan buf
  in
  prerr_endline (sprintf "DEBUG: wgetting url '%s:%d%s'" addr port path);
  let sockaddr = Unix.ADDR_INET (Unix.inet_addr_of_string addr, port) in
  let suck = Unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
  Unix.connect suck sockaddr;
  let outchan = Unix.out_channel_of_descr suck in
  output_string outchan (sprintf "GET %s HTTP/1.0\r\n\r\n" path);
  flush outchan;
  let inchan = Unix.in_channel_of_descr suck in
  let buf = Buffer.create 1023 in
  try
    wget' inchan buf
  with End_of_file -> Buffer.contents buf
in
let callback (req: request) outchan =
  let i = int_of_string (req#param "x") in
  prerr_endline (string_of_int i);
  match i with
  | 0 -> output_string outchan "0"
  | x when x>0 ->
      let data =
        wget "127.0.0.1" 9999 (sprintf "/foo?x=%d" (x-1))
(*         wget "127.0.0.1" 80 "/index.html" *)
      in
      output_string outchan (sprintf "%s %d" data x)
  | _ -> assert false
in
let mode = `Thread in
Http_daemon.start' ~port:9999 ~mode callback