- hbugs first draft release, not yet tested

[helm.git] / helm / hbugs / common / hbugs_misc.ml

diff --git a/helm/hbugs/common/hbugs_misc.ml b/helm/hbugs/common/hbugs_misc.ml
new file mode 100644 (file)
index 0000000..30f4608
--- /dev/null
+++ b/helm/hbugs/common/hbugs_misc.ml
@@ -0,0 +1,95 @@
+(*
+ *  Copyright (C) 2003, HELM Team.
+ *
+ *  This file is part of HELM, an Hypertextual, Electronic
+ *  Library of Mathematics, developed at the Computer Science
+ *  Department, University of Bologna, Italy.
+ *
+ *  HELM 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.
+ *
+ *  HELM 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 HELM; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ *  MA  02111-1307, USA.
+ *
+ *  For details, see the HELM World-Wide-Web page,
+ *  http://cs.unibo.it/helm/.
+ *)
+
+open Printf;;
+
+let body_sep_RE = Pcre.regexp "\r\n\r\n";;
+let url_scheme_RE = Pcre.regexp ~flags:[`CASELESS] "http://";;
+let url_RE = Pcre.regexp "^([\\w.]+)(:(\\d+))?(/.*)?$";;
+let parse_url url =
+  try
+    let subs = Pcre.extract ~rex:url_RE (Pcre.replace ~rex:url_scheme_RE url) in
+    (subs.(1),
+    (if subs.(2) = "" then 80 else int_of_string subs.(3)),
+    (if subs.(4) = "" then "/" else subs.(4)))
+  with exc ->
+    failwith
+      (sprintf "Can't parse url: %s (exception: %s)"
+        url (Printexc.to_string exc))
+;;
+let get_body answer =
+  match Pcre.split ~rex:body_sep_RE answer with
+  | [_; body] -> body
+  | _ -> failwith "Invalid response received: can't parse response's body"
+;;
+
+let init_socket addr port =
+  let inet_addr = (Unix.gethostbyname addr).Unix.h_addr_list.(0) in
+  let sockaddr = Unix.ADDR_INET (inet_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
+  let inchan = Unix.in_channel_of_descr suck in
+  (inchan, outchan)
+;;
+let rec retrieve inchan buf =
+  Buffer.add_string buf (input_line inchan ^ "\n");
+  retrieve inchan buf
+;;
+
+let http_get url =
+  let (address, port, path) = parse_url url in
+  let (inchan, outchan) = init_socket address port in
+  output_string outchan (sprintf "GET %s HTTP/1.0\r\n\r\n" path);
+  flush outchan;
+  let buf = Buffer.create 1023 in
+  try
+    retrieve inchan buf
+  with End_of_file -> get_body (Buffer.contents buf)
+;;
+
+let http_post ?(body = "") url =
+  let (address, port, path) = parse_url url in
+  let (inchan, outchan) = init_socket address port in
+  output_string outchan (sprintf "POST %s HTTP/1.0\r\n" path);
+  output_string outchan (sprintf "Content-Length: %d\r\n" (String.length body));
+  output_string outchan "\r\n";
+  output_string outchan body;
+  flush outchan;
+  let buf = Buffer.create 1023 in
+  try
+    retrieve inchan buf
+  with End_of_file -> get_body (Buffer.contents buf)
+;;
+
+let rec hashtbl_remove_all tbl key =
+  if Hashtbl.mem tbl key then begin
+    Hashtbl.remove tbl key;
+    hashtbl_remove_all tbl key
+  end else
+    ()
+;;
+