(*
- * 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
* 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 trailing_dot_gz_RE = Pcre.regexp "\\.gz$" (* for g{,un}zip *)
+let url_RE = Pcre.regexp "^([\\w.]+)(:(\\d+))?(/.*)?$"
+let http_scheme_RE = Pcre.regexp ~flags:[`CASELESS] "^http://"
+let file_scheme_RE = Pcre.regexp ~flags:[`CASELESS] "^file://"
+let dir_sep_RE = Pcre.regexp "/"
+let heading_slash_RE = Pcre.regexp "^/"
+
+let bufsiz = 16384 (* for file system I/O *)
+let tcp_bufsiz = 4096 (* for TCP I/O *)
+
let fold_file f init fname =
let inchan = open_in fname in
let rec fold_lines' value =
in
List.fold_left (fun acc k -> f k (Hashtbl.find tbl k) acc) init sorted_keys
+let cp src dst =
+ let (ic, oc) = (open_in src, open_out dst) 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 output oc buf 0 bytes
+ done
+ with End_of_file -> ());
+ close_in ic; close_out oc
+
+let parse_url url =
+ try
+ let subs =
+ Pcre.extract ~rex:url_RE (Pcre.replace ~rex:http_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 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 http_get_iter_buf ~callback url =
+ let (address, port, path) = parse_url url in
+ let buf = String.create tcp_bufsiz in
+ let (inchan, outchan) = init_socket address port in
+ output_string outchan (sprintf "GET %s\r\n" path);
+ flush outchan;
+ (try
+ while true do
+ match input inchan buf 0 tcp_bufsiz with
+ | 0 -> raise End_of_file
+ | bytes when bytes = tcp_bufsiz -> (* buffer full, no need to slice it *)
+ callback buf
+ | bytes when bytes < tcp_bufsiz -> (* buffer not full, slice it *)
+ callback (String.sub buf 0 bytes)
+ | _ -> (* ( bytes < 0 ) || ( bytes > tcp_bufsiz ) *)
+ assert false
+ done
+ with End_of_file -> ());
+ close_in inchan (* close also outchan, same fd *)
+
let wget ?output url =
- 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]
+ debug_print
+ (sprintf "wgetting %s (output: %s)" url
+ (match output with None -> "default" | Some f -> f));
+ match url with
+ | url when Pcre.pmatch ~rex:file_scheme_RE url -> (* file:// *)
+ (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 *)
+ ())
+ | url when Pcre.pmatch ~rex:http_scheme_RE url -> (* http:// *)
+ (let oc =
+ open_out (match output with Some f -> f | None -> Filename.basename url)
+ in
+ http_get_iter_buf ~callback:(fun data -> output_string oc data) url;
+ close_out oc)
+ | scheme -> (* unsupported scheme *)
+ failwith ("Http_getter_misc.wget: unsupported scheme: " ^ scheme)
- (* stderr shown as usual *)
let gzip ?(keep = false) fname =
- if keep then begin (* keep original file *)
- debug_print ("gzip -f -c " ^ fname);
- Shell.call
- ~stdout:(Shell.to_file (fname ^ ".gz"))
- [Shell.cmd "gzip" ["-f"; "-c"; fname]]
- end else begin (* don't keep original file *)
- debug_print ("gzip -f " ^ fname);
- Shell.call [Shell.cmd "gzip" ["-f"; fname]]
- end
-
- (* stderr shown as usual *)
+ 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 =
- if not (Pcre.pmatch ~pat:"\\.gz$" fname) then
- failwith "gunzip: source file doesn't end with '.gz'";
- let basename = Pcre.replace ~pat:"\\.gz$" fname in
- if keep then begin (* keep original file *)
- debug_print ("gunzip -f -c " ^ fname);
- Shell.call
- ~stdout:(Shell.to_file basename)
- [Shell.cmd "gunzip" ["-f"; "-c"; fname]]
- end else begin (* don't keep original file *)
- debug_print ("gunzip -f " ^ fname);
- Shell.call [Shell.cmd "gunzip" ["-f"; fname]]
- end
-
-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)
+ 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 () = Filename.temp_file "http_getter_" ""
+
+exception Mkdir_failure of string * string;; (* dirname, failure reason *)
+let dir_perm = 0o755
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 mkdirhier () =
+ let (pieces, hd) =
+ let split = Pcre.split ~rex:dir_sep_RE dirname in
+ if Pcre.pmatch ~rex:heading_slash_RE dirname then
+ (List.tl split, "/")
+ else
+ (split, "")
+ in
+ ignore
+ (List.fold_left
+ (fun pre dir ->
+ let next_dir =
+ sprintf "%s%s%s" pre (match pre with "/" | "" -> "" | _ -> "/") dir
+ in
+ (try
+ (match (Unix.stat next_dir).Unix.st_kind with
+ | Unix.S_DIR -> () (* dir component already exists, go on! *)
+ | _ -> (* dir component already exists but isn't a dir, abort! *)
+ raise
+ (Mkdir_failure (dirname,
+ sprintf "'%s' already exists but is not a dir" next_dir)))
+ with Unix.Unix_error (Unix.ENOENT, "stat", _) ->
+ (* dir component doesn't exists, create it and go on! *)
+ Unix.mkdir next_dir dir_perm);
+ next_dir)
+ hd pieces)
+ in
+ if parents then mkdirhier () else Unix.mkdir dirname dir_perm
let string_of_proc_status = function
| Unix.WEXITED code -> sprintf "[Exited: %d]" code
| Unix.WSTOPPED sg -> sprintf "[Stopped: %d]" sg
let http_get url =
- try
- Some (Http_client.Convenience.http_get url)
- with Http_client.Http_error (code, _) -> None
+ 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
projects / helm.git / blobdiff