(*
  OCaml HTTP - do it yourself (fully OCaml) HTTP daemon

  Copyright (C) <2002> Stefano Zacchiroli <zack@cs.unibo.it>

  This program 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.

  This program 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 this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*)

open Http_types;;

let date_822 () =
  Netdate.mk_mail_date ~zone:Netdate.localzone (Unix.time ())

let is_directory name =
  match Unix.lstat name with
  | { Unix.st_kind = Unix.S_DIR } -> true
  | _ -> false

let filesize fname = (Unix.stat fname).Unix.st_size

let strip_trailing_slash =
  let rex = Pcre.regexp "/$" in
  fun s -> Pcre.replace ~rex ~templ:"" s

let strip_heading_slash =
  let rex = Pcre.regexp "^/" in
  fun s -> Pcre.replace ~rex ~templ:"" s

let ls dir =
  let rec ls' entries =
    try ls' ((Unix.readdir dir)::entries) with End_of_file -> entries
  in
  ls' []

let string_explode s =
  let rec string_explode' acc = function
    | "" -> acc
    | s -> string_explode' (s.[0] :: acc) (String.sub s 1 (String.length s - 1))
  in
  List.rev (string_explode' [] s)

let string_implode = List.fold_left (fun s c -> s ^ (String.make 1 c)) ""

let reason_phrase_of_code = function
  | 100 -> "Continue"
  | 101 -> "Switching protocols"
  | 200 -> "OK"
  | 201 -> "Created"
  | 202 -> "Accepted"
  | 203 -> "Non authoritative information"
  | 204 -> "No content"
  | 205 -> "Reset content"
  | 206 -> "Partial content"
  | 300 -> "Multiple choices"
  | 301 -> "Moved permanently"
  | 302 -> "Found"
  | 303 -> "See other"
  | 304 -> "Not modified"
  | 305 -> "Use proxy"
  | 307 -> "Temporary redirect"
  | 400 -> "Bad request"
  | 401 -> "Unauthorized"
  | 402 -> "Payment required"
  | 403 -> "Forbidden"
  | 404 -> "Not found"
  | 405 -> "Method not allowed"
  | 406 -> "Not acceptable"
  | 407 -> "Proxy authentication required"
  | 408 -> "Request time out"
  | 409 -> "Conflict"
  | 410 -> "Gone"
  | 411 -> "Length required"
  | 412 -> "Precondition failed"
  | 413 -> "Request entity too large"
  | 414 -> "Request URI too large"
  | 415 -> "Unsupported media type"
  | 416 -> "Requested range not satisfiable"
  | 417 -> "Expectation failed"
  | 500 -> "Internal server error"
  | 501 -> "Not implemented"
  | 502 -> "Bad gateway"
  | 503 -> "Service unavailable"
  | 504 -> "Gateway time out"
  | 505 -> "HTTP version not supported"
  | invalid_code -> raise (Invalid_code invalid_code)