2 * Copyright (C) 2003-2004:
3 * Stefano Zacchiroli <zack@cs.unibo.it>
4 * for the HELM Team http://helm.cs.unibo.it/
6 * This file is part of HELM, an Hypertextual, Electronic
7 * Library of Mathematics, developed at the Computer Science
8 * Department, University of Bologna, Italy.
10 * HELM is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * HELM is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with HELM; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
25 * For details, see the HELM World-Wide-Web page,
26 * http://helm.cs.unibo.it/
29 open Http_getter_types;;
32 let string_of_ls_flag = function No -> "NO" | Yes -> "YES" | Ann -> "ANN"
33 let string_of_encoding = function
34 | Enc_normal -> "Normal"
35 | Enc_gzipped -> "GZipped"
37 let is_cic_obj_uri uri = Pcre.pmatch ~pat:"^cic:" uri
38 let is_theory_uri uri = Pcre.pmatch ~pat:"^theory:" uri
39 let is_cic_uri uri = is_cic_obj_uri uri || is_theory_uri uri
40 let is_nuprl_uri uri = Pcre.pmatch ~pat:"^nuprl:" uri
41 let is_rdf_uri uri = Pcre.pmatch ~pat:"^helm:rdf(.*):(.*)//(.*)" uri
42 let is_xsl_uri uri = Pcre.pmatch ~pat:"^\\w+\\.xsl" uri
44 let rec uri_of_string = function
45 | uri when is_rdf_uri uri ->
46 (match Pcre.split ~pat:"//" uri with
49 match uri_of_string uri with
50 | Cic_uri xmluri -> xmluri
51 | _ -> raise (Invalid_URI uri)
53 Rdf_uri (prefix, rest)
54 | _ -> raise (Invalid_URI uri))
55 | uri when is_cic_uri uri -> Cic_uri (Cic (Pcre.replace ~pat:"^cic:" uri))
56 | uri when is_nuprl_uri uri -> Nuprl_uri (Pcre.replace ~pat:"^nuprl:" uri)
57 | uri when is_theory_uri uri ->
58 Cic_uri (Theory (Pcre.replace ~pat:"^theory:" uri))
59 | uri -> raise (Invalid_URI uri)
63 ~pat:(sprintf "DOCTYPE (.*) SYSTEM\\s+\"%s/"
64 (Lazy.force Http_getter_env.dtd_base_url))
65 ~templ:(sprintf "DOCTYPE $1 SYSTEM \"%s/getdtd?uri="
66 (Lazy.force Http_getter_env.my_own_url))
69 let mk_patch_fun tag line =
71 ~pat:(sprintf "%s\\s+href=\"" tag)
72 ~templ:(sprintf "%s href=\"%s/getxslt?uri="
73 tag (Lazy.force Http_getter_env.my_own_url))
76 let (patch_import, patch_include) =
77 (mk_patch_fun "xsl:import", mk_patch_fun "xsl:include")
79 patch_include (patch_import line)
82 ~pat:(sprintf "ENTITY (.*) SYSTEM\\s+\"(%s/)?"
83 (Lazy.force Http_getter_env.dtd_base_url))
84 ~templ:(sprintf "ENTITY $1 SYSTEM \"%s/getdtd?uri="
85 (Lazy.force Http_getter_env.my_own_url))
89 ~fname ?contype ?contenc ?(patch_fun = fun x -> x) ?(gunzip = false) outchan
92 match (contype, contenc) with
93 | (Some t, Some e) -> ["Content-Encoding", e; "Content-Type", t]
94 | (Some t, None) -> ["Content-Type" , t]
95 | (None, Some e) -> ["Content-Encoding", e]
98 Http_daemon.send_basic_headers ~code:200 outchan;
99 Http_daemon.send_headers headers outchan;
100 Http_daemon.send_CRLF outchan;
101 if gunzip then begin (* gunzip needed, uncompress file, apply patch_fun to
102 it, compress the result and sent it to client *)
104 (Http_getter_misc.tempfile (), Http_getter_misc.tempfile ())
107 Http_getter_misc.gunzip ~keep:true ~output:tmp1 fname;(* gunzip to tmp1 *)
108 let new_file = open_out tmp2 in
109 Http_getter_misc.iter_file (* tmp2 = patch(tmp1) *)
110 (fun line -> output_string new_file (patch_fun line ^ "\n"))
113 Http_getter_misc.gzip ~output:tmp1 tmp2; (* tmp1 = gzip(tmp2); rm tmp2 *)
114 Http_getter_misc.iter_file (* send tmp1 to client as is*)
115 (fun line -> output_string outchan (line ^ "\n"))
117 Sys.remove tmp1 (* rm tmp1 *)
121 end else (* no need to gunzip, apply patch_fun directly to file *)
122 Http_getter_misc.iter_file
123 (fun line -> output_string outchan (patch_fun line ^ "\n"))