(*
* Copyright (C) 2003, HELM Team.
*
* This file is part of HELM, an Hypertextual, Electronic
* Library of Mathematics, developed at the Computer Science
* Department, University of Bologna, Italy.
*
* HELM 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.
*
* HELM 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 HELM; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
* For details, see the HELM World-Wide-Web page,
* http://cs.unibo.it/helm/.
*)
open Http_getter_types;;
open Printf;;
let string_of_ls_flag = function No -> "NO" | Yes -> "YES" | Ann -> "ANN"
let string_of_encoding = function
| Enc_normal -> "Normal"
| Enc_gzipped -> "GZipped"
let is_cic_uri uri = Pcre.pmatch ~pat:"^cic:" uri
let is_theory_uri uri = Pcre.pmatch ~pat:"^theory:" uri
let is_xml_uri uri = is_cic_uri uri || is_theory_uri uri
let is_rdf_uri uri = Pcre.pmatch ~pat:"^helm:rdf(.*):(.*)//(.*)" uri
let is_xsl_uri uri = Pcre.pmatch ~pat:"^\\w+\\.xsl" uri
let rec http_getter_uri_of_string = function
| uri when is_rdf_uri uri ->
(match Pcre.split ~pat:"//" uri with
| [ prefix; uri ] ->
let rest =
match http_getter_uri_of_string uri with
| Xml_uri xmluri -> xmluri
| _ -> raise (Http_getter_invalid_URI uri)
in
Rdf_uri (prefix, rest)
| _ -> raise (Http_getter_invalid_URI uri))
| uri when is_cic_uri uri -> Xml_uri (Cic (Pcre.replace ~pat:"^cic:" uri))
| uri when is_theory_uri uri ->
Xml_uri (Theory (Pcre.replace ~pat:"^theory:" uri))
| uri -> raise (Http_getter_invalid_URI uri)
let patch_xml line =
Pcre.replace
~pat:(sprintf "DOCTYPE (.*) SYSTEM\\s+\"%s/" Http_getter_env.dtd_base_url)
~templ:(
sprintf "DOCTYPE $1 SYSTEM \"%s/getdtd?uri=" Http_getter_env.my_own_url)
line
let patch_xsl =
let mk_patch_fun tag line =
Pcre.replace
~pat:(sprintf "%s\\s+href=\"" tag)
~templ:(
sprintf "%s href=\"%s/getxslt?uri=" tag Http_getter_env.my_own_url)
line
in
let (patch_import, patch_include) =
(mk_patch_fun "xsl:import", mk_patch_fun "xsl:include")
in
fun line -> patch_include (patch_import line)
let patch_dtd line =
Pcre.replace
~pat:"ENTITY (.*) SYSTEM\\s+\""
~templ:(
sprintf "ENTITY $1 SYSTEM \"%s/getdtd?uri=" Http_getter_env.my_own_url)
line
let pp_error s =
sprintf "Http Getter error: %s
" s
let pp_internal_error s =
sprintf "Http Getter Internal error: %s
" s
let pp_msg s = sprintf "%s
" s
let null_pp s = s
let mk_return_fun pp_fun contype msg outchan =
Http_daemon.respond
~body:(pp_fun msg) ~headers:["Content-Type", contype] outchan
let return_html_error = mk_return_fun pp_error "text/html"
let return_html_internal_error = mk_return_fun pp_internal_error "text/html"
let return_html_msg = mk_return_fun pp_msg "text/html"
let return_xml_msg = mk_return_fun null_pp "text/xml"
let return_file ~fname ?contype ?contenc ?(patch_fun = fun x -> x) outchan =
let headers =
match (contype, contenc) with
| (Some t, Some e) -> ["Content-Encoding", e; "Content-Type", t]
| (Some t, None) -> ["Content-Type" , t]
| (None, Some e) -> ["Content-Encoding", e]
| (None, None) -> []
in
Http_daemon.send_basic_headers ~code:200 outchan;
Http_daemon.send_headers headers outchan;
Http_daemon.send_CRLF outchan;
Http_getter_misc.iter_file
(fun line -> output_string outchan (patch_fun line ^ "\n"))
fname
let return_400 body outchan = Http_daemon.respond_error ~code:400 ~body outchan