--- /dev/null
+(*
+ * Copyright (C) 2003-2004:
+ * 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
+ * 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/
+ *)
+
+(* $Id$ *)
+
+open Http_getter_types;;
+open Printf;;
+
+let string_of_ls_flag = function No -> "NO" | Yes -> "YES" | Ann -> "ANN"
+let string_of_encoding = function
+ | `Normal -> "Normal"
+ | `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 uri_of_string = function
+ | uri when is_rdf_uri uri ->
+ (match Pcre.split ~pat:"//" uri with
+ | [ prefix; uri ] ->
+ let rest =
+ match uri_of_string uri with
+ | Cic_uri xmluri -> xmluri
+ | _ -> raise (Invalid_URI uri)
+ in
+ Rdf_uri (prefix, rest)
+ | _ -> raise (Invalid_URI uri))
+ | uri when is_cic_obj_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 (Invalid_URI uri)
+
+let patch_xsl ?(via_http = true) () =
+ fun line ->
+ let mk_patch_fun tag line =
+ Pcre.replace
+ ~pat:(sprintf "%s\\s+href=\"" tag)
+ ~templ:(sprintf "%s href=\"%s/getxslt?uri="
+ tag (Lazy.force Http_getter_env.my_own_url))
+ line
+ in
+ let (patch_import, patch_include) =
+ (mk_patch_fun "xsl:import", mk_patch_fun "xsl:include")
+ in
+ patch_include (patch_import line)
+
+let patch_system kind ?(via_http = true) () =
+ let rex =
+ Pcre.regexp (sprintf "%s (.*) SYSTEM\\s+\"((%s)/)?" kind
+ (String.concat "|" (Lazy.force Http_getter_env.dtd_base_urls)))
+ in
+ let templ =
+ if via_http then
+ sprintf "%s $1 SYSTEM \"%s/getdtd?uri=" kind
+ (Lazy.force Http_getter_env.my_own_url)
+ else
+ sprintf "%s $1 SYSTEM \"file://%s/" kind
+ (Lazy.force Http_getter_env.dtd_dir)
+ in
+ fun line -> Pcre.replace ~rex ~templ line
+
+let patch_entity = patch_system "ENTITY"
+let patch_doctype = patch_system "DOCTYPE"
+
+let patch_xmlbase =
+ let rex = Pcre.regexp "^(\\s*<\\w[^ ]*)(\\s|>)" in
+ fun xmlbases baseurl baseuri s ->
+ let s' =
+ Pcre.replace ~rex
+ ~templ:(sprintf "$1 xml:base=\"%s\" helm:base=\"%s\"$2" baseurl baseuri)
+ s
+ in
+ if s <> s' then xmlbases := None;
+ s'
+
+let patch_dtd = patch_entity
+let patch_xml ?via_http ?xmlbases () =
+ let xmlbases = ref xmlbases in
+ fun line ->
+ match !xmlbases with
+ | None -> patch_doctype ?via_http () (patch_entity ?via_http () line)
+ | Some (xmlbaseuri, xmlbaseurl) ->
+ patch_xmlbase xmlbases xmlbaseurl xmlbaseuri
+ (patch_doctype ?via_http () (patch_entity ?via_http () line))
+
+let return_file
+ ~fname ?contype ?contenc ?patch_fun ?(gunzip = false) ?(via_http = true)
+ ~enc outchan
+=
+ if via_http then begin
+ 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:(`Code 200) outchan;
+ Http_daemon.send_headers headers outchan;
+ Http_daemon.send_CRLF outchan
+ end;
+ match gunzip, patch_fun with
+ | true, Some patch_fun ->
+ Http_getter_logger.log ~level:2
+ "Patch required, uncompress/compress cycle needed :-(";
+ (* 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
+ (try
+ Http_getter_misc.gunzip ~keep:true ~output:tmp1 fname; (* gunzip 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");
+ flush outchan)
+ 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"); flush outchan)
+ tmp1;
+ Sys.remove tmp1 (* rm tmp1 *)
+ with e ->
+ Sys.remove tmp1;
+ raise e)
+ | false, Some patch_fun ->
+ (match enc with
+ | `Normal ->
+ Http_getter_misc.iter_file
+ (fun line -> output_string outchan (patch_fun (line ^ "\n")))
+ fname
+ | `Gzipped -> assert false)
+ (* dangerous case, if this happens it needs to be investigated *)
+ | _, None -> Http_getter_misc.iter_file_data (output_string outchan) fname
+;;
+
projects / helm.git / blobdiff