- added damned_recursion example

[helm.git] / helm / DEVEL / ocaml-http / examples / damned_recursion.ml

diff --git a/helm/DEVEL/ocaml-http/examples/damned_recursion.ml b/helm/DEVEL/ocaml-http/examples/damned_recursion.ml
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+
+(*
+  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 Printf;;
+
+(*
+let wget url =
+  prerr_endline (sprintf "DEBUG: wgetting url '%s'" url);
+  Http_client.Convenience.http_get url
+in
+*)
+let wget addr port path =
+  let rec wget' inchan data =
+    try
+      wget' inchan (data ^ input_line inchan)
+    with End_of_file ->
+      data
+  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" path);
+  flush outchan;
+  let inchan = Unix.in_channel_of_descr suck in
+  wget' inchan ""
+in
+let callback req 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 (sprintf "http://localhost:9999/foo?x=%d" (x-1)) *)
+(*         wget "http://localhost:80/index.html" *)
+      in
+      output_string outchan (sprintf "%s %d" data x)
+  | _ -> assert false
+in
+Http_client.Convenience.http_trials := 1;
+(* Http_daemon.start' ~port:9999 ~mode:`Thread callback *)
+Http_daemon.start' ~port:9999 ~mode:`Fork callback