+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 =
+ 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)
+
+let gzip ?(keep = false) ?output fname =
+ let output = match output with None -> fname ^ ".gz" | Some fname -> fname in
+ debug_print (sprintf "gzipping %s (keep: %b, output: %s)" fname keep output);
+ let (ic, oc) = (open_in fname, Gzip.open_out output) 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) ?output fname =
+ (* assumption: given file name ends with ".gz" or output is set *)
+ let output =
+ match output with
+ | None ->
+ if (Pcre.pmatch ~rex:trailing_dot_gz_RE fname) then
+ Pcre.replace ~rex:trailing_dot_gz_RE fname
+ else
+ failwith
+ "Http_getter_misc.gunzip: unable to determine output file name"
+ | Some fname -> fname
+ in
+ debug_print (sprintf "gunzipping %s (keep: %b, output: %s)"
+ fname keep output);
+ let (ic, oc) = (Gzip.open_in fname, open_out output) 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 Pervasives.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 =
+ 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.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
+
+ (** apply a transformation "string list -> string list" to file lines *)
+let mangle_file ~fname f =
+ let ic = open_in fname in
+ let lines = Zack.input_lines ic in
+ close_in ic;
+ let oc = open_out fname in
+ Zack.output_lines (f lines) oc;
+ close_out oc
+;;
+
+let add_line ~fname ?position line =
+ mangle_file ~fname
+ (fun lines ->
+ match position with
+ | None -> lines @ [line]
+ | Some i ->
+ assert (i >= 0);
+ let rec add_after i = function
+ | (acc, []) -> acc @ [line] (* eof *)
+ | (acc, ((hd::tl) as l)) ->
+ if i = 0 then
+ acc @ [line] @ l
+ else
+ add_after (i-1) (acc @ [hd], tl)
+ in
+ add_after i ([], lines))
+;;
+
+let remove_line ~fname position =
+ mangle_file ~fname
+ (fun lines ->
+ assert (position >= 0);
+ let rec remove i = function
+ | (acc, []) -> acc (* eof *)
+ | (acc, ((hd::tl) as l)) ->
+ if i = 0 then
+ acc @ tl
+ else
+ remove (i-1) (acc @ [hd], tl)
+ in
+ remove position ([], lines))
+;;
+
+let is_blank_line =
+ let blank_line_RE = Pcre.regexp "(^#)|(^\\s*$)" in
+ fun line ->
+ Pcre.pmatch ~rex:blank_line_RE line
+;;
+