1 (* Copyright (C) 2002, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
29 let debug_print s = if debug then prerr_endline s;;
30 Http_common.debug := true;;
31 (* Http_common.debug := true;; *)
33 (** accepted HTTP servers for ask_uwobo method forwarding *)
34 let valid_servers = [ "mowgli.cs.unibo.it:58080" ; "mowgli.cs.unibo.it" ; "localhost:58080" ] ;;
36 let mqi_flags = [] (* default MathQL interpreter options *)
40 let daemon_name = "Search Engine";;
41 let default_port = 58085;;
42 let port_env_var = "SEARCH_ENGINE_PORT";;
46 Sys.getenv "SEARCH_ENGINE_HTML_DIR"
47 with Not_found -> "html" (* relative to searchEngine's document root *)
49 let interactive_user_uri_choice_TPL = pages_dir ^ "/templateambigpdq1.html";;
50 let interactive_interpretation_choice_TPL = pages_dir ^ "/templateambigpdq2.html";;
51 let final_results_TPL = pages_dir ^ "/templateambigpdq3.html";;
53 exception Chat_unfinished
55 (** pretty print a MathQL query result to an HELM theory file *)
56 let theory_of_result result =
57 let results_no = List.length result in
58 if results_no > 0 then
59 let mode = if results_no > 10 then "linkonly" else "typeonly" in
61 let idx = ref (results_no + 1) in
65 "<tr><td valign=\"top\">" ^ string_of_int !idx ^ ".</td><td><ht:OBJECT uri=\"" ^ uri ^ "\" mode=\"" ^ mode ^ "\"/></td></tr>" ^ i
68 "<h1>Query Results:</h1><table xmlns:ht=\"http://www.cs.unibo.it/helm/namespaces/helm-theory\">" ^ results ^ "</table>"
70 "<h1>Query Results:</h1><p>No results found!</p>"
73 let pp_result result =
74 "<html xmlns:ht=\"http://www.cs.unibo.it/helm/namespaces/helm-theory\">\n<head><title>Query Results</title><style> A { text-decoration: none } </style></head>\n<body>" ^ theory_of_result result ^ "</body></html>"
77 (** chain application of Pcre substitutions *)
78 let rec apply_substs substs line =
81 | (rex, templ) :: rest -> apply_substs rest (Pcre.replace ~rex ~templ line)
82 (** fold like function on files *)
83 let fold_file f init fname =
84 let inchan = open_in fname in
85 let rec fold_lines' value =
87 let line = input_line inchan in
88 fold_lines' (f value line)
89 with End_of_file -> value
91 let res = (try fold_lines' init with e -> (close_in inchan; raise e)) in
94 (** iter like function on files *)
95 let iter_file f = fold_file (fun _ line -> f line) ()
97 let (title_tag_RE, choices_tag_RE, msg_tag_RE, id_to_uris_RE, id_RE,
98 interpretations_RE, interpretations_labels_RE, results_RE, new_aliases_RE)
100 (Pcre.regexp "@TITLE@", Pcre.regexp "@CHOICES@", Pcre.regexp "@MSG@",
101 Pcre.regexp "@ID_TO_URIS@", Pcre.regexp "@ID@",
102 Pcre.regexp "@INTERPRETATIONS@", Pcre.regexp "@INTERPRETATIONS_LABELS@",
103 Pcre.regexp "@RESULTS@", Pcre.regexp "@NEW_ALIASES@")
104 let server_and_port_url_RE = Pcre.regexp "^http://([^/]+)/.*$"
106 exception NotAnInductiveDefinition
110 int_of_string (Sys.getenv port_env_var)
112 | Not_found -> default_port
113 | Failure "int_of_string" ->
114 prerr_endline "Warning: invalid port, reverting to default";
117 let pp_error = sprintf "<html><body><h1>Error: %s</h1></body></html>" in
118 let bad_request body outchan =
119 Http_daemon.respond_error ~status:(`Client_error `Bad_request) ~body outchan
121 let contype = "Content-Type", "text/html" in
123 (* SEARCH ENGINE functions *)
125 let refine_constraints (constr_obj, constr_rel, constr_sort) =
128 (constr_obj, constr_rel, constr_sort),
129 (Some constr_obj, Some constr_rel, Some constr_sort)
130 | "/matchConclusion" ->
133 (function (uri,pos,_) -> (uri,pos,None))
135 (function (uri,pos,depth) as constr ->
136 pos="http://www.cs.unibo.it/helm/schemas/schema-helm#MainConclusion"
138 pos="http://www.cs.unibo.it/helm/schemas/schema-helm#InConclusion"
141 (*CSC: we must select the must constraints here!!! *)
142 (constr_obj',[],[]),(Some constr_obj', None, None)
146 let get_constraints term =
148 "/locateInductivePrinciple" ->
151 Cic.MutInd (uri,t,_) -> MQueryUtil.string_of_uriref (uri,[t])
152 | _ -> raise NotAnInductiveDefinition
155 [uri,"http://www.cs.unibo.it/helm/schemas/schema-helm#InHypothesis",
157 uri,"http://www.cs.unibo.it/helm/schemas/schema-helm#MainHypothesis",
162 ["http://www.cs.unibo.it/helm/schemas/schema-helm#MainConclusion",
165 ["http://www.cs.unibo.it/helm/schemas/schema-helm#MainHypothesis",
166 Some 1, "http://www.cs.unibo.it/helm/schemas/schema-helm#Prop"]
168 (constr_obj, constr_rel, constr_sort), (None,None,None)
170 let must = MQueryLevels2.get_constraints term in
171 refine_constraints must req_path
174 (* HTTP DAEMON CALLBACK *)
176 let callback (req: Http_types.request) outchan =
178 debug_print (sprintf "Received request: %s" req#path);
181 let mqi_handle = MQIConn.init mqi_flags debug_print in
182 let query_string = req#param "query" in
183 let lexbuf = Lexing.from_string query_string in
184 let query = MQueryUtil.query_of_text lexbuf in
185 let result = MQueryGenerator.execute_query mqi_handle query in
186 let result_string = pp_result result in
187 MQIConn.close mqi_handle;
188 Http_daemon.respond ~body:result_string ~headers:[contype] outchan
190 let mqi_handle = MQIConn.init mqi_flags debug_print in
191 let id = req#param "id" in
192 let result = MQueryGenerator.locate mqi_handle id in
193 MQIConn.close mqi_handle;
194 Http_daemon.respond ~headers:[contype] ~body:(pp_result result) outchan
196 (* TODO implement "is_permitted" *)
197 (let is_permitted _ = true in
198 let remove_fragment uri = Pcre.replace ~pat:"#.*" uri in
199 let page = remove_fragment (req#param "url") in
202 bool_of_string (req#param "preprocess")
203 with Invalid_argument _ | Http_types.Param_not_found _ -> false)
206 | page when is_permitted page ->
207 (let fname = sprintf "%s/%s" pages_dir (remove_fragment page) in
208 Http_daemon.send_basic_headers ~code:200 outchan;
209 Http_daemon.send_header "Content-Type" "text/html" outchan;
210 Http_daemon.send_CRLF outchan;
211 if preprocess then begin
214 output_string outchan
217 (function (key,value) ->
219 (Pcre.extract ~pat:"param\\.(.*)" key).(1)
221 Pcre.regexp ("@" ^ key' ^ "@"), value
224 (fun (key,_) as p-> Pcre.pmatch ~pat:"^param\\." key)
231 Http_daemon.send_file ~src:(FileSrc fname) outchan)
232 | page -> Http_daemon.respond_forbidden ~url:page outchan))
234 let url = req#param "url" in
235 let server_and_port =
236 (Pcre.extract ~rex:server_and_port_url_RE url).(1)
238 if List.mem server_and_port valid_servers then
240 ~headers:["Content-Type", "text/html"]
241 ~body:(Http_client.Convenience.http_get url)
245 ~body:(pp_error ("Untrusted UWOBO server: " ^ server_and_port))
249 | "/locateInductivePrinciple" ->
250 let mqi_handle = MQIConn.init mqi_flags debug_print in
251 let term_string = req#param "term" in
252 let lexbuf = Lexing.from_string term_string in
253 let (context, metasenv) = ([], []) in
254 let (dom, mk_metasenv_and_expr) =
255 CicTextualParserContext.main
256 ~context ~metasenv CicTextualLexer.token lexbuf
258 let id_to_uris_raw = req#param "aliases" in
259 let tokens = Pcre.split ~pat:"\\s" id_to_uris_raw in
260 let rec parse_tokens keys lookup = function (* TODO spostarla fuori *)
262 | "alias" :: key :: value :: rest ->
263 let key' = CicTextualParser0.Id key in
269 (CicTextualParser0.Uri (MQueryMisc.cic_textual_parser_uri_of_string value))
272 | _ -> failwith "Can't parse aliases"
274 let parse_choices choices_raw =
275 let choices = Pcre.split ~pat:";" choices_raw in
278 match Pcre.split ~pat:"\\s" x with
280 | id::tail when id<>"" ->
282 prerr_endline ("#### " ^ id ^ " :=");
283 List.iter (fun u -> prerr_endline ("<" ^ Netencoding.Url.decode u ^ ">")) tail;
285 Some (List.map (fun u -> Netencoding.Url.decode u) tail)
288 | _ -> failwith "Can't parse choices")
292 let (id_to_uris : Disambiguate.domain_and_interpretation) =
293 parse_tokens [] (fun _ -> None) tokens in
296 let choices_raw = req#param "choices" in
297 parse_choices choices_raw
298 with Http_types.Param_not_found _ -> (fun _ -> None)
300 let module Chat: Disambiguate.Callbacks =
303 let get_metasenv () =
304 !CicTextualParser0.metasenv
306 let set_metasenv metasenv =
307 CicTextualParser0.metasenv := metasenv
309 let output_html = prerr_endline
311 let interactive_user_uri_choice
313 ?enable_button_for_non_vars ~(title: string) ~(msg: string)
314 ~(id: string) (choices: string list)
316 (match id_to_choices id with
317 | Some choices -> choices
319 let msg = Pcre.replace ~pat:"\"" ~templ:"\\\"" msg in
320 (match selection_mode with
321 | `SINGLE -> assert false
323 Http_daemon.send_basic_headers ~code:200 outchan ;
324 Http_daemon.send_CRLF outchan ;
327 let formatted_choices =
329 (List.map (fun uri -> sprintf "\"%s\"" uri) choices)
333 [title_tag_RE, title;
334 choices_tag_RE, formatted_choices;
336 id_to_uris_RE, id_to_uris_raw;
340 output_string outchan (processed_line ^ "\n"))
341 interactive_user_uri_choice_TPL;
342 raise Chat_unfinished))
344 let interactive_interpretation_choice interpretations =
345 let html_interpretations_labels =
350 (String.concat "<br />"
353 (sprintf "alias %s %s" id value))
358 let html_interpretations =
366 (sprintf "alias %s %s"
368 (MQueryMisc.wrong_xpointer_format_from_wrong_xpointer_format'
374 Http_daemon.send_basic_headers ~code:200 outchan ;
375 Http_daemon.send_CRLF outchan ;
380 [interpretations_RE, html_interpretations;
381 interpretations_labels_RE, html_interpretations_labels]
384 output_string outchan (processed_line ^ "\n"))
385 interactive_interpretation_choice_TPL;
386 raise Chat_unfinished
388 let input_or_locate_uri ~title =
389 UriManager.uri_of_string "cic:/Coq/Init/DataTypes/nat_ind.con"
393 let module Disambiguate' = Disambiguate.Make (Chat) in
394 let (id_to_uris', metasenv', term') =
395 Disambiguate'.disambiguate_input mqi_handle
396 context metasenv dom mk_metasenv_and_expr id_to_uris
398 (match metasenv' with
400 let must',only = get_constraints term' req#path in
401 let results = MQueryGenerator.searchPattern mqi_handle must' only in
402 Http_daemon.send_basic_headers ~code:200 outchan ;
403 Http_daemon.send_CRLF outchan ;
407 match id_to_uris' with
412 sprintf "\"alias %s cic:%s\""
414 CicTextualParser0.Id name -> name
415 | _ -> assert false (*CSC: completare *))
417 | None -> assert false
418 | Some (CicTextualParser0.Uri t) ->
419 MQueryMisc.string_of_cic_textual_parser_uri
421 | _ -> assert false (*CSC: completare *)))
426 [results_RE, theory_of_result results ;
427 new_aliases_RE, new_aliases]
430 output_string outchan (processed_line ^ "\n"))
432 | _ -> (* unable to instantiate some implicit variable *)
435 ~body:"some implicit variables are still unistantiated :-("
437 MQIConn.close mqi_handle
439 Http_daemon.respond_error ~status:(`Client_error `Bad_request) outchan);
440 debug_print (sprintf "%s done!" req#path)
442 | Chat_unfinished -> prerr_endline "Chat unfinished, Try again!"
443 | Http_types.Param_not_found attr_name ->
444 bad_request (sprintf "Parameter '%s' is missing" attr_name) outchan
447 ~body:(pp_error ("Uncaught exception: " ^ (Printexc.to_string exc)))
450 printf "%s started and listening on port %d\n" daemon_name port;
451 printf "Current directory is %s\n" (Sys.getcwd ());
452 printf "HTML directory is %s\n" pages_dir;
454 Unix.putenv "http_proxy" "";
455 Http_daemon.start' ~port callback;
456 printf "%s is terminating, bye!\n" daemon_name