(* * Copyright (C) 2003: * Stefano Zacchiroli * 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 * 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://helm.cs.unibo.it/ *) 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_obj_uri uri = Pcre.pmatch ~pat:"^cic:" uri let is_theory_uri uri = Pcre.pmatch ~pat:"^theory:" uri let is_cic_uri uri = is_cic_obj_uri uri || is_theory_uri uri let is_nuprl_uri uri = Pcre.pmatch ~pat:"^nuprl:" 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 | Cic_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 -> Cic_uri (Cic (Pcre.replace ~pat:"^cic:" uri)) | uri when is_nuprl_uri uri -> Nuprl_uri (Pcre.replace ~pat:"^nuprl:" uri) | uri when is_theory_uri uri -> Cic_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_html_raw = mk_return_fun null_pp "text/html" let return_xml_raw = mk_return_fun null_pp "text/xml" let return_file ~fname ?contype ?contenc ?(patch_fun = fun x -> x) ?(gunzip = false) 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; if gunzip then begin (* gunzip needed, uncompress file, apply patch_fun to it, compress the result and sent it to client *) let (tmp1, tmp2) = (Http_getter_misc.tempfile (), Http_getter_misc.tempfile ()) in Http_getter_misc.gunzip ~keep:true ~output:tmp1 fname; (* gunzip to tmp1 *) let new_file = open_out tmp2 in Http_getter_misc.iter_file (* tmp2 = patch(tmp1) *) (fun line -> output_string new_file (patch_fun line ^ "\n")) tmp1; close_out new_file; Http_getter_misc.gzip ~output:tmp1 tmp2; (* tmp1 = gzip(tmp2); rm tmp2 *) Http_getter_misc.iter_file (* send tmp1 to client as is*) (fun line -> output_string outchan (line ^ "\n")) tmp1; Sys.remove tmp1 (* rm tmp1 *) end else (* no need to gunzip, apply patch_fun directly to file *) 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