X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fhttp_getter%2Fhttp_getter_misc.ml;h=0bc701685242d7c009c685587dfcef9ca2168687;hb=b3bd459aeedce3ae8b21e25c3f8cab730bd544f9;hp=d40fbf4f6f0dea5b358f2c572daa65a0c7e80014;hpb=86e80bc65186bf4c2824dc94f5f4dd5966843f14;p=helm.git

diff --git a/helm/http_getter/http_getter_misc.ml b/helm/http_getter/http_getter_misc.ml
index d40fbf4f6..0bc701685 100644
--- a/helm/http_getter/http_getter_misc.ml
+++ b/helm/http_getter/http_getter_misc.ml
@@ -1,5 +1,7 @@
 (*
- *  Copyright (C) 2000, HELM Team.
+ * Copyright (C) 2003:
+ *    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
@@ -21,9 +23,12 @@
  *  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_debugger;;
+open Printf;;
+
 let fold_file f init fname =
   let inchan = open_in fname in
   let rec fold_lines' value =
@@ -43,3 +48,101 @@ let hashtbl_sorted_fold f tbl init =
   in
   List.fold_left (fun acc k -> f k (Hashtbl.find tbl k) acc) init sorted_keys
 
+let cp src dst =
+  Shell.call
+    ~stdout:Shell.to_dev_null ~stderr:Shell.to_dev_null
+    [Shell.cmd "cp" [src; dst]]
+
+let file_scheme_RE = Pcre.regexp "^file://"
+let wget ?output url =
+  let use_wget () =
+    let flags =
+      (match output with Some file -> ["-O"; file] | None -> []) @ [url]
+    in
+    debug_print ("wget " ^ String.concat " " flags);
+    Shell.call
+      ~stdout:Shell.to_dev_null ~stderr:Shell.to_dev_null
+      [Shell.cmd "wget" flags]
+  in
+  if Pcre.pmatch ~rex:file_scheme_RE url then begin (* file:// URL *)
+    let src_fname = Pcre.replace ~rex:file_scheme_RE url in
+    match output with
+    | Some dst_fname -> cp src_fname dst_fname
+    | None ->
+        let dst_fname = Filename.basename src_fname in
+        if src_fname <> dst_fname then
+          cp src_fname dst_fname
+        else  (* src and dst are the same: do nothing *)
+          ()
+  end else  (* other URL, pass it to wget *)
+    use_wget ()
+
+let bufsiz = 16384                              (* for g{,un}zip *)
+let trailing_dot_gz_RE = Pcre.regexp "\\.gz$"   (* for g{,un}zip *)
+
+let gzip ?(keep = false) fname =
+  debug_print (sprintf "gzipping %s (keep: %b)" fname keep);
+  let (ic, oc) = (open_in fname, Gzip.open_out (fname ^ ".gz")) in
+  let buf = String.create bufsiz in
+  (try
+    while true do
+      let bytes = input ic buf 0 bufsiz in
+      if bytes = 0 then raise End_of_file else Gzip.output oc buf 0 bytes
+    done
+  with End_of_file -> ());
+  close_in ic;
+  Gzip.close_out oc;
+  if not keep then Sys.remove fname
+
+let gunzip ?(keep = false) fname =
+  debug_print (sprintf "gunzipping %s (keep: %b)" fname keep);
+  let basename = Pcre.replace ~rex:trailing_dot_gz_RE fname in
+  assert (basename <> fname);
+  let (ic, oc) = (Gzip.open_in fname, open_out basename) in
+  let buf = String.create bufsiz in
+  (try
+    while true do
+      let bytes = Gzip.input ic buf 0 bufsiz in
+      if bytes = 0 then raise End_of_file else output oc buf 0 bytes
+    done
+  with End_of_file -> ());
+  Gzip.close_in ic;
+  close_out oc;
+  if not keep then Sys.remove fname
+
+let tempfile () =
+  let buf = Buffer.create 28 in (* strlen("/tmp/fileSzb3Mw_http_getter") *)
+  Shell.call
+    ~stdout:(Shell.to_buffer buf)
+    [Shell.cmd "tempfile" ["--suffix=_http_getter"]];
+  Pcre.replace ~pat:"\n" (Buffer.contents buf)
+
+let mkdir ?(parents = false) dirname =
+  if not (Sys.file_exists dirname) then begin
+    let flags = if parents then ["-p"; dirname] else [dirname] in
+    debug_print ("mkdir " ^ String.concat " " flags);
+    Shell.call [Shell.cmd "mkdir" flags]
+  end
+
+let string_of_proc_status = function
+  | Unix.WEXITED code -> sprintf "[Exited: %d]" code
+  | Unix.WSIGNALED sg -> sprintf "[Killed: %d]" sg
+  | Unix.WSTOPPED sg -> sprintf "[Stopped: %d]" sg
+
+let http_get url =
+  if Pcre.pmatch ~rex:file_scheme_RE url then begin
+      (* file:// URL. Read data from file system *)
+    let fname = Pcre.replace ~rex:file_scheme_RE url in
+    try
+      let size = (Unix.stat fname).Unix.st_size in
+      let buf = String.create size in
+      let ic = open_in fname in
+      really_input ic buf 0 size;
+      close_in ic;
+      Some buf
+    with Unix.Unix_error (Unix.ENOENT, "stat", _) -> None
+  end else  (* other URL, pass it to netclient *)
+    try
+      Some (Http_client.Convenience.http_get url)
+    with Http_client.Http_error (code, _) -> None
+