Ported to Helm_registry.

[helm.git] / helm / http_getter / http_getter_env.ml

diff --git a/helm/http_getter/http_getter_env.ml b/helm/http_getter/http_getter_env.ml
index e97c89cbfb1b36be4fe3b678da31cc88234f77ef..a7ab80f24ef81c14a1dc01cd88ebd17d628caeba 100644 (file)
--- a/helm/http_getter/http_getter_env.ml
+++ b/helm/http_getter/http_getter_env.ml
@@ -1,5 +1,7 @@
 (*
- *  Copyright (C) 2003, HELM Team.
+ * Copyright (C) 2003-2004:
+ *    Stefano Zacchiroli <zack@cs.unibo.it>
+ *    for the HELM Team http://helm.cs.unibo.it/
  *
  *  This file is part of HELM, an Hypertextual, Electronic
  *  Library of Mathematics, developed at the Computer Science
@@ -21,14 +23,17 @@
  *  MA  02111-1307, USA.
  *
  *  For details, see the HELM World-Wide-Web page,
- *  http://cs.unibo.it/helm/.
+ *  http://helm.cs.unibo.it/
  *)
 
-open Http_getter_types;;
-open Printf;;
-open Pxp_document;;
-open Pxp_types;;
-open Pxp_yacc;;
+open Printf
+open Pxp_document
+open Pxp_types
+open Pxp_yacc
+
+open Http_getter_types
+
+let version = Http_getter_const.version
 
 type setting_src =
   | Environment (* read setting from environment variables *)
@@ -42,7 +47,7 @@ let (conf_file, conf_dir) =
     let conf_dir =
       Pcre.replace ~pat:"/$" (Sys.getenv "HELM_CONFIGURATION_DIR")
     in
-    (conf_dir ^ "/configuration.xml", conf_dir)
+    (conf_dir ^ "/" ^ Http_getter_const.conffile, conf_dir)
   with Not_found -> failwith "HELM_CONFIGURATION_DIR undefined"
 
 let safe_getenv ?(from = Both) var =
@@ -73,19 +78,36 @@ let safe_getenv ?(from = Both) var =
       | v -> return_value var v)))
 
 let servers_file = safe_getenv "HTTP_GETTER_SERVERS_FILE"
-let parse_servers () =
-  (let cons hd tl = hd @ [ tl ] in
-  Http_getter_misc.fold_file cons [] servers_file)
-let servers = ref (parse_servers ())
-let reload_servers () = servers := parse_servers ()
 
-let xml_dbm = safe_getenv "HTTP_GETTER_XML_DBM"
+let load_servers () =
+  let pos = ref (-1) in
+  List.rev (Http_getter_misc.fold_file
+    (fun line servers ->
+      if Http_getter_misc.is_blank_line line then
+        servers
+      else
+        (incr pos; (!pos, line) :: servers))
+    []
+    servers_file)
+
+let _servers = ref (load_servers ())
+let servers () = !_servers
+
+let save_servers () =
+  let oc = open_out servers_file in
+  List.iter (fun (_,server) -> output_string oc (server ^ "\n")) (servers ());
+  close_out oc
+let reload_servers () = _servers := load_servers ()
+
+let cic_dbm = safe_getenv "HTTP_GETTER_CIC_DBM"
+let nuprl_dbm = safe_getenv "HTTP_GETTER_NUPRL_DBM"
 let rdf_dbm = safe_getenv "HTTP_GETTER_RDF_DBM"
 let xsl_dbm = safe_getenv "HTTP_GETTER_XSL_DBM"
 let xml_index = safe_getenv "HTTP_GETTER_XML_INDEXNAME"
 let rdf_index = safe_getenv "HTTP_GETTER_RDF_INDEXNAME"
 let xsl_index = safe_getenv "HTTP_GETTER_XSL_INDEXNAME"
-let xml_dir = safe_getenv "HTTP_GETTER_XML_DIR"
+let cic_dir = safe_getenv "HTTP_GETTER_CIC_DIR"
+let nuprl_dir = safe_getenv "HTTP_GETTER_NUPRL_DIR"
 let rdf_dir = safe_getenv "HTTP_GETTER_RDF_DIR"
 let dtd_dir = safe_getenv "HTTP_GETTER_DTD_DIR"
 
@@ -112,18 +134,21 @@ let cache_mode =
   | "gz" -> Enc_gzipped
   | mode -> failwith ("Invalid cache mode: " ^ mode)
 
-let reload () =
-  reload_servers ()
+let reload () = reload_servers ()
 
-let dump_env () =
-  printf
-"xml_dbm:\t%s
+let env_to_string () =
+  sprintf
+"HTTP Getter %s (the OCaml one!)
+
+cic_dbm:\t%s
+nuprl_dbm:\t%s
 rdf_dbm:\t%s
 xsl_dbm:\t%s
 xml_index:\t%s
 rdf_index:\t%s
 xsl_index:\t%s
-xml_dir:\t%s
+cic_dir:\t%s
+nuprl_dir:\t%s
 rdf_dir:\t%s
 dtd_dir:\t%s
 servers_file:\t%s
@@ -137,10 +162,32 @@ conf_dir:\t%s
 servers:
 \t%s
 "
-    xml_dbm rdf_dbm xsl_dbm xml_index rdf_index xsl_index
-    xml_dir rdf_dir dtd_dir servers_file host port
-    my_own_url dtd_base_url
+    version cic_dbm nuprl_dbm rdf_dbm xsl_dbm xml_index rdf_index xsl_index
+    cic_dir nuprl_dir rdf_dir dtd_dir servers_file host port my_own_url
+    dtd_base_url
     (match cache_mode with Enc_normal -> "Normal" | Enc_gzipped -> "GZipped")
-    conf_file conf_dir (String.concat "\n\t" !servers);
-  flush stdout
+    conf_file conf_dir
+    (String.concat "\n\t" (* (position * server) list *)
+      (List.map (fun (pos, server) -> sprintf "%3d: %s" pos server)
+        (servers ())))
+
+let add_server ?position url =
+  (match position with
+  | None ->
+      _servers := !_servers @ [-1, url];
+  | Some p when p > 0 ->
+      let rec add_after pos = function
+        | [] -> [-1, url]
+        | hd :: tl when p = 1 -> hd :: (-1, url) :: tl
+        | hd :: tl (* when p > 1 *) -> hd :: (add_after (pos - 1) tl)
+      in
+      _servers := add_after p !_servers
+  | Some _ -> assert false);
+  save_servers ();
+  reload_servers ()
+
+let remove_server position =
+  _servers := List.remove_assoc position !_servers;
+  save_servers ();
+  reload_servers ()