+++ /dev/null
-(* Copyright (C) 2002, 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/.
- *)
-
-module T = MQGTypes
-module U = MQGUtil
-module G = MQueryGenerator
-module C = MQIConn
-
-open Http_types ;;
-
-let debug = true;;
-let debug_print s = if debug then prerr_endline s;;
-Http_common.debug := true;;
-(* Http_common.debug := true;; *)
-
- (** accepted HTTP servers for ask_uwobo method forwarding *)
-let valid_servers =
- [ "mowgli.cs.unibo.it:58080" ; "mowgli.cs.unibo.it" ; "localhost:58080" ];;
-
-let mqi_flags = [] (* default MathQL interpreter options *)
-
-open Printf;;
-
-let daemon_name = "Search Engine";;
-let default_port = 58085;;
-let port_env_var = "SEARCH_ENGINE_PORT";;
-
-let pages_dir =
- try
- Sys.getenv "SEARCH_ENGINE_HTML_DIR"
- with Not_found -> "html" (* relative to searchEngine's document root *)
-;;
-let interactive_user_uri_choice_TPL = pages_dir ^ "/templateambigpdq1.html";;
-let interactive_interpretation_choice_TPL =
- pages_dir ^ "/templateambigpdq2.html";;
-let constraints_choice_TPL = pages_dir ^ "/constraints_choice_template.html";;
-let final_results_TPL = pages_dir ^ "/templateambigpdq3.html";;
-
-exception Chat_unfinished
-
- (* build a bool from a 1-character-string *)
-let bool_of_string' = function
- | "0" -> false
- | "1" -> true
- | s -> failwith ("Can't parse a boolean from string: " ^ s)
-;;
-
- (* build an int option from a string *)
-let int_of_string' = function
- | "_" -> None
- | s ->
- try
- Some (int_of_string s)
- with Failure "int_of_string" ->
- failwith ("Can't parse an int option from string: " ^ s)
-;;
-
- (* HTML pretty printers for mquery_generator types *)
-
-let html_of_r_obj (pos, uri) =
- sprintf
- "<tr><td><input type='checkbox' name='constr_obj' checked='on'/></td><td>%s</td><td>%s</td><td>%s</td></tr>"
- uri (U.text_of_position pos)
- (if U.is_main_position pos then
- sprintf "<input name='obj_depth' size='2' type='text' value='%s' />"
- (U.text_of_depth pos "")
- else
- "<input type=\"hidden\" name=\"obj_depth\" />")
-;;
-
-let html_of_r_rel pos =
- sprintf
- "<tr><td><input type='checkbox' name='constr_rel' checked='on'/></td><td>%s</td><td><input name='rel_depth' size='2' type='text' value='%s' /></td></tr>"
- (U.text_of_position (pos:>T.full_position)) (U.text_of_depth (pos:>T.full_position) "")
-;;
-
-let html_of_r_sort (pos, sort) =
- sprintf
- "<tr><td><input type='checkbox' name='constr_sort' checked='on'/></td><td>%s</td><td>%s</td><td><input name='sort_depth' size='2' type='text' value='%s'/></td></tr>"
- (U.text_of_sort sort) (U.text_of_position (pos:>T.full_position)) (U.text_of_depth (pos:>T.full_position) "")
-;;
-
- (** pretty print a MathQL query result to an HELM theory file *)
-let theory_of_result result =
- let results_no = List.length result in
- if results_no > 0 then
- let mode = if results_no > 10 then "linkonly" else "typeonly" in
- let results =
- let idx = ref (results_no + 1) in
- List.fold_right
- (fun (uri,attrs) i ->
- decr idx ;
- "<tr><td valign=\"top\">" ^ string_of_int !idx ^ ".</td><td><ht:OBJECT uri=\"" ^ uri ^ "\" mode=\"" ^ mode ^ "\"/></td></tr>" ^ i
- ) result ""
- in
- "<h1>Query Results:</h1><table xmlns:ht=\"http://www.cs.unibo.it/helm/namespaces/helm-theory\">" ^ results ^ "</table>"
- else
- "<h1>Query Results:</h1><p>No results found!</p>"
-;;
-
-let pp_result result =
- "<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>"
-;;
-
- (** chain application of Pcre substitutions *)
-let rec apply_substs substs line =
- match substs with
- | [] -> line
- | (rex, templ) :: rest -> apply_substs rest (Pcre.replace ~rex ~templ line)
- (** fold like function on files *)
-let fold_file f init fname =
- let inchan = open_in fname in
- let rec fold_lines' value =
- try
- let line = input_line inchan in
- fold_lines' (f value line)
- with End_of_file -> value
- in
- let res = (try fold_lines' init with e -> (close_in inchan; raise e)) in
- close_in inchan;
- res
- (** iter like function on files *)
-let iter_file f = fold_file (fun _ line -> f line) ()
-
-let (title_tag_RE, choices_tag_RE, msg_tag_RE, id_to_uris_RE, id_RE,
- interpretations_RE, interpretations_labels_RE, results_RE, new_aliases_RE,
- form_RE, variables_initialization_RE)
- =
- (Pcre.regexp "@TITLE@", Pcre.regexp "@CHOICES@", Pcre.regexp "@MSG@",
- Pcre.regexp "@ID_TO_URIS@", Pcre.regexp "@ID@",
- Pcre.regexp "@INTERPRETATIONS@", Pcre.regexp "@INTERPRETATIONS_LABELS@",
- Pcre.regexp "@RESULTS@", Pcre.regexp "@NEW_ALIASES@", Pcre.regexp "@FORM@",
- Pcre.regexp "@VARIABLES_INITIALIZATION@")
-let server_and_port_url_RE = Pcre.regexp "^http://([^/]+)/.*$"
-
-exception NotAnInductiveDefinition
-
-let port =
- try
- int_of_string (Sys.getenv port_env_var)
- with
- | Not_found -> default_port
- | Failure "int_of_string" ->
- prerr_endline "Warning: invalid port, reverting to default";
- default_port
-;;
-
-let pp_error = sprintf "<html><body><h1>Error: %s</h1></body></html>";;
-
-let bad_request body outchan =
- Http_daemon.respond_error ~status:(`Client_error `Bad_request) ~body outchan
-;;
-
-let contype = "Content-Type", "text/html";;
-
-(* SEARCH ENGINE functions *)
-
-let get_constraints term =
- function
- | "/locateInductivePrinciple" ->
- let uri =
- match term with
- Cic.MutInd (uri,t,_) -> MQueryUtil.string_of_uriref (uri,[t])
- | _ -> raise NotAnInductiveDefinition
- in
- let constr_obj =
- [(`InHypothesis, uri); (`MainHypothesis (Some 0), uri)]
- in
- let constr_rel = [`MainConclusion None] in
- let constr_sort = [(`MainHypothesis (Some 1), T.Prop)] in
- U.universe_for_search_pattern,
- (constr_obj, constr_rel, constr_sort), (None,None,None)
- | "/searchPattern" ->
- let constr_obj, constr_rel, constr_sort =
- CGSearchPattern.get_constraints term in
- U.universe_for_search_pattern,
- (constr_obj, constr_rel, constr_sort),
- (Some constr_obj, Some constr_rel, Some constr_sort)
- | "/matchConclusion" ->
- let list_of_must, only = CGMatchConclusion.get_constraints [] [] term in
-(* FG: there is no way to choose the block number ***************************)
- let block = pred (List.length list_of_must) in
- U.universe_for_match_conclusion,
- (List.nth list_of_must block, [], []), (Some only, None, None)
- | _ -> assert false
-;;
-
-(*
- format:
- <must_obj> ':' <must_rel> ':' <must_sort> ':' <only_obj> ':' <only_rel> ':' <only_sort>
-
- <must_*> ::= ('0'|'1') ('_'|<int>) (',' ('0'|'1') ('_'|<int>))*
- <only> ::= '0'|'1'
-*)
-let add_user_constraints ~constraints
- ((obj, rel, sort), (only_obj, only_rel, only_sort))
-=
- let parse_must s =
- let l = Pcre.split ~pat:"," s in
- (try
- List.map
- (fun s ->
- let subs = Pcre.extract ~pat:"^(.)(\\d+|_)$" s in
- (bool_of_string' subs.(1), int_of_string' subs.(2)))
- l
- with
- Not_found -> failwith ("Can't parse constraint string: " ^ constraints)
- )
- in
- (* to be used on "obj" *)
- let add_user_must33 user_must must =
- List.map2
- (fun (b, i) (p, u) ->
- if b then Some (U.set_full_position p i, u) else None)
- user_must must
- in
- (* to be used on "rel" *)
- let add_user_must22 user_must must =
- List.map2
- (fun (b, i) p -> if b then Some (U.set_main_position p i) else None)
- user_must must
- in
- (* to be used on "sort" *)
- let add_user_must32 user_must must =
- List.map2
- (fun (b, i) (p, s)-> if b then Some (U.set_main_position p i, s) else None)
- user_must must
- in
- match Pcre.split ~pat:":" constraints with
- | [user_obj;user_rel;user_sort;user_only_obj;user_only_rel;user_only_sort] ->
- let
- (user_obj,user_rel,user_sort,user_only_obj,user_only_rel,user_only_sort)
- =
- (parse_must user_obj,
- parse_must user_rel,
- parse_must user_sort,
- bool_of_string' user_only_obj,
- bool_of_string' user_only_rel,
- bool_of_string' user_only_sort)
- in
- let only' =
- (if user_only_obj then only_obj else None),
- (if user_only_rel then only_rel else None),
- (if user_only_sort then only_sort else None)
- in
- let must' =
- let rec filter_some =
- function
- [] -> []
- | None::tl -> filter_some tl
- | (Some x)::tl -> x::(filter_some tl)
- in
- filter_some (add_user_must33 user_obj obj),
- filter_some (add_user_must22 user_rel rel),
- filter_some (add_user_must32 user_sort sort)
- in
- (must', only')
- | _ -> failwith ("Can't parse constraint string: " ^ constraints)
-in
-
-(* HTTP DAEMON CALLBACK *)
-
-let callback (req: Http_types.request) outchan =
- try
- debug_print (sprintf "Received request: %s" req#path);
- (match req#path with
- | "/execute" ->
- let mqi_handle = C.init mqi_flags debug_print in
- let query_string = req#param "query" in
- let lexbuf = Lexing.from_string query_string in
- let query = MQueryUtil.query_of_text lexbuf in
- let result = MQueryInterpreter.execute mqi_handle query in
- let result_string = pp_result result in
- C.close mqi_handle;
- Http_daemon.respond ~body:result_string ~headers:[contype] outchan
- | "/locate" ->
- let mqi_handle = C.init mqi_flags debug_print in
- let id = req#param "id" in
- let query = G.locate id in
- let result = MQueryInterpreter.execute mqi_handle query in
- C.close mqi_handle;
- Http_daemon.respond ~headers:[contype] ~body:(pp_result result) outchan
- | "/unreferred" ->
- let mqi_handle = C.init mqi_flags debug_print in
- let target = req#param "target" in
- let source = req#param "source" in
- let query = G.unreferred target source in
- let result = MQueryInterpreter.execute mqi_handle query in
- C.close mqi_handle;
- Http_daemon.respond ~headers:[contype] ~body:(pp_result result) outchan
- | "/getpage" ->
- (* TODO implement "is_permitted" *)
- (let is_permitted _ = true in
- let remove_fragment uri = Pcre.replace ~pat:"#.*" uri in
- let page = remove_fragment (req#param "url") in
- let preprocess =
- (try
- bool_of_string (req#param "preprocess")
- with Invalid_argument _ | Http_types.Param_not_found _ -> false)
- in
- (match page with
- | page when is_permitted page ->
- (let fname = sprintf "%s/%s" pages_dir (remove_fragment page) in
- Http_daemon.send_basic_headers ~code:200 outchan;
- Http_daemon.send_header "Content-Type" "text/html" outchan;
- Http_daemon.send_CRLF outchan;
- if preprocess then begin
- iter_file
- (fun line ->
- output_string outchan
- ((apply_substs
- (List.map
- (function (key,value) ->
- let key' =
- (Pcre.extract ~pat:"param\\.(.*)" key).(1)
- in
- Pcre.regexp ("@" ^ key' ^ "@"), value
- )
- (List.filter
- (fun (key,_) as p-> Pcre.pmatch ~pat:"^param\\." key)
- req#params)
- )
- line) ^
- "\n"))
- fname
- end else
- Http_daemon.send_file ~src:(FileSrc fname) outchan)
- | page -> Http_daemon.respond_forbidden ~url:page outchan))
- | "/ask_uwobo" ->
- let url = req#param "url" in
- let server_and_port =
- (Pcre.extract ~rex:server_and_port_url_RE url).(1)
- in
- if List.mem server_and_port valid_servers then
- Http_daemon.respond
- ~headers:["Content-Type", "text/html"]
- ~body:(Http_client.Convenience.http_get url)
- outchan
- else
- Http_daemon.respond
- ~body:(pp_error ("Untrusted UWOBO server: " ^ server_and_port))
- outchan
- | "/searchPattern"
- | "/matchConclusion"
- | "/locateInductivePrinciple" ->
- let mqi_handle = C.init mqi_flags debug_print in
- let term_string = req#param "term" in
- let lexbuf = Lexing.from_string term_string in
- let (context, metasenv) = ([], []) in
- let (dom, mk_metasenv_and_expr) =
- CicTextualParserContext.main
- ~context ~metasenv CicTextualLexer.token lexbuf
- in
- let id_to_uris_raw = req#param "aliases" in
- let tokens = Pcre.split ~pat:"\\s" id_to_uris_raw in
- let rec parse_tokens keys lookup = function (* TODO spostarla fuori *)
- | [] -> keys, lookup
- | "alias" :: key :: value :: rest ->
- let key' = CicTextualParser0.Id key in
- parse_tokens
- (key'::keys)
- (fun id ->
- if id = key' then
- Some
- (CicTextualParser0.Uri (MQueryMisc.cic_textual_parser_uri_of_string value))
- else lookup id)
- rest
- | _ -> failwith "Can't parse aliases"
- in
- let parse_choices choices_raw =
- let choices = Pcre.split ~pat:";" choices_raw in
- List.fold_left
- (fun f x ->
- match Pcre.split ~pat:"\\s" x with
- | ""::id::tail
- | id::tail when id<>"" ->
- (fun id' ->
-prerr_endline ("#### " ^ id ^ " :=");
-List.iter (fun u -> prerr_endline ("<" ^ Netencoding.Url.decode u ^ ">")) tail;
- if id = id' then
- Some (List.map (fun u -> Netencoding.Url.decode u) tail)
- else
- f id')
- | _ -> failwith "Can't parse choices")
- (fun _ -> None)
- choices
- in
- let (id_to_uris : Disambiguate.domain_and_interpretation) =
- parse_tokens [] (fun _ -> None) tokens in
- let id_to_choices =
- try
- let choices_raw = req#param "choices" in
- parse_choices choices_raw
- with Http_types.Param_not_found _ -> (fun _ -> None)
- in
- let module Chat: Disambiguate.Callbacks =
- struct
-
- let get_metasenv () =
- !CicTextualParser0.metasenv
-
- let set_metasenv metasenv =
- CicTextualParser0.metasenv := metasenv
-
- let output_html = prerr_endline
-
- let interactive_user_uri_choice
- ~selection_mode ?ok
- ?enable_button_for_non_vars ~(title: string) ~(msg: string)
- ~(id: string) (choices: string list)
- =
- (match id_to_choices id with
- | Some choices -> choices
- | None ->
- let msg = Pcre.replace ~pat:"\'" ~templ:"\\\'" msg in
- (match selection_mode with
- | `SINGLE -> assert false
- | `EXTENDED ->
- Http_daemon.send_basic_headers ~code:200 outchan ;
- Http_daemon.send_CRLF outchan ;
- iter_file
- (fun line ->
- let formatted_choices =
- String.concat ","
- (List.map (fun uri -> sprintf "\'%s\'" uri) choices)
- in
- let processed_line =
- apply_substs
- [title_tag_RE, title;
- choices_tag_RE, formatted_choices;
- msg_tag_RE, msg;
- id_to_uris_RE, id_to_uris_raw;
- id_RE, id]
- line
- in
- output_string outchan (processed_line ^ "\n"))
- interactive_user_uri_choice_TPL;
- raise Chat_unfinished))
-
- let interactive_interpretation_choice interpretations =
- let html_interpretations_labels =
- String.concat ", "
- (List.map
- (fun l ->
- "\'" ^
- (String.concat "<br />"
- (List.map
- (fun (id, value) ->
- (sprintf "alias %s %s" id value))
- l)) ^
- "\'")
- interpretations)
- in
- let html_interpretations =
- String.concat ", "
- (List.map
- (fun l ->
- "\'" ^
- (String.concat " "
- (List.map
- (fun (id, value) ->
- (sprintf "alias %s %s"
- id
- (MQueryMisc.wrong_xpointer_format_from_wrong_xpointer_format'
- value)))
- l)) ^
- "\'")
- interpretations)
- in
- Http_daemon.send_basic_headers ~code:200 outchan ;
- Http_daemon.send_CRLF outchan ;
- iter_file
- (fun line ->
- let processed_line =
- apply_substs
- [interpretations_RE, html_interpretations;
- interpretations_labels_RE, html_interpretations_labels]
- line
- in
- output_string outchan (processed_line ^ "\n"))
- interactive_interpretation_choice_TPL;
- raise Chat_unfinished
-
- let input_or_locate_uri ~title =
- UriManager.uri_of_string "cic:/Coq/Init/DataTypes/nat_ind.con"
-
- end
- in
- let module Disambiguate' = Disambiguate.Make (Chat) in
- let (id_to_uris', metasenv', term') =
- Disambiguate'.disambiguate_input mqi_handle
- context metasenv dom mk_metasenv_and_expr id_to_uris
- in
- (match metasenv' with
- | [] ->
- let universe,
- ((must_obj, must_rel, must_sort) as must'),
- ((only_obj, only_rel, only_sort) as only) =
- get_constraints term' req#path
- in
- let must'', only' =
- (try
- add_user_constraints
- ~constraints:(req#param "constraints")
- (must', only)
- with Http_types.Param_not_found _ ->
- let variables =
- "var aliases = '" ^ id_to_uris_raw ^ "';\n" ^
- "var constr_obj_len = " ^
- string_of_int (List.length must_obj) ^ ";\n" ^
- "var constr_rel_len = " ^
- string_of_int (List.length must_rel) ^ ";\n" ^
- "var constr_sort_len = " ^
- string_of_int (List.length must_sort) ^ ";\n" in
- let form =
- (if must_obj = [] then "" else
- "<h4>Obj constraints</h4>" ^
- "<table>" ^
- (String.concat "\n" (List.map html_of_r_obj must_obj)) ^
- "</table>" ^
- (* The following three lines to make Javascript create *)
- (* the constr_obj[] and obj_depth[] arrays even if we *)
- (* have only one real entry. *)
- "<input type=\"hidden\" name=\"constr_obj\" />" ^
- "<input type=\"hidden\" name=\"obj_depth\" />") ^
- (if must_rel = [] then "" else
- "<h4>Rel constraints</h4>" ^
- "<table>" ^
- (String.concat "\n" (List.map html_of_r_rel must_rel)) ^
- "</table>" ^
- (* The following two lines to make Javascript create *)
- (* the constr_rel[] and rel_depth[] arrays even if *)
- (* we have only one real entry. *)
- "<input type=\"hidden\" name=\"constr_rel\" />" ^
- "<input type=\"hidden\" name=\"rel_depth\" />") ^
- (if must_sort = [] then "" else
- "<h4>Sort constraints</h4>" ^
- "<table>" ^
- (String.concat "\n" (List.map html_of_r_sort must_sort)) ^
- "</table>" ^
- (* The following two lines to make Javascript create *)
- (* the constr_sort[] and sort_depth[] arrays even if *)
- (* we have only one real entry. *)
- "<input type=\"hidden\" name=\"constr_sort\" />" ^
- "<input type=\"hidden\" name=\"sort_depth\" />") ^
- "<h4>Only constraints</h4>" ^
- "Enforce Only constraints for objects: " ^
- "<input type='checkbox' name='only_obj'" ^
- (if only_obj = None then "" else " checked='yes'") ^ " /><br />" ^
- "Enforce Rel constraints for objects: " ^
- "<input type='checkbox' name='only_rel'" ^
- (if only_rel = None then "" else " checked='yes'") ^ " /><br />" ^
- "Enforce Sort constraints for objects: " ^
- "<input type='checkbox' name='only_sort'" ^
- (if only_sort = None then "" else " checked='yes'") ^ " /><br />"
- in
- Http_daemon.send_basic_headers ~code:200 outchan ;
- Http_daemon.send_CRLF outchan ;
- iter_file
- (fun line ->
- let processed_line =
- apply_substs
- [form_RE, form ;
- variables_initialization_RE, variables] line
- in
- output_string outchan (processed_line ^ "\n"))
- constraints_choice_TPL;
- raise Chat_unfinished)
- in
- let query =
- G.query_of_constraints (Some universe) must'' only'
- in
- let results = MQueryInterpreter.execute mqi_handle query in
- Http_daemon.send_basic_headers ~code:200 outchan ;
- Http_daemon.send_CRLF outchan ;
- iter_file
- (fun line ->
- let new_aliases =
- match id_to_uris' with
- | (domain, f) ->
- String.concat ", "
- (List.map
- (fun name ->
- sprintf "\'alias %s cic:%s\'"
- (match name with
- CicTextualParser0.Id name -> name
- | _ -> assert false (*CSC: completare *))
- (match f name with
- | None -> assert false
- | Some (CicTextualParser0.Uri t) ->
- MQueryMisc.string_of_cic_textual_parser_uri
- t
- | _ -> assert false (*CSC: completare *)))
- domain)
- in
- let processed_line =
- apply_substs
- [results_RE, theory_of_result results ;
- new_aliases_RE, new_aliases]
- line
- in
- output_string outchan (processed_line ^ "\n"))
- final_results_TPL
- | _ -> (* unable to instantiate some implicit variable *)
- Http_daemon.respond
- ~headers:[contype]
- ~body:"some implicit variables are still unistantiated :-("
- outchan);
- C.close mqi_handle
- | invalid_request ->
- Http_daemon.respond_error ~status:(`Client_error `Bad_request) outchan);
- debug_print (sprintf "%s done!" req#path)
- with
- | Chat_unfinished -> prerr_endline "Chat unfinished, Try again!"
- | Http_types.Param_not_found attr_name ->
- bad_request (sprintf "Parameter '%s' is missing" attr_name) outchan
- | exc ->
- Http_daemon.respond
- ~body:(pp_error ("Uncaught exception: " ^ (Printexc.to_string exc)))
- outchan
-in
-printf "%s started and listening on port %d\n" daemon_name port;
-printf "Current directory is %s\n" (Sys.getcwd ());
-printf "HTML directory is %s\n" pages_dir;
-flush stdout;
-Unix.putenv "http_proxy" "";
-Http_daemon.start' ~port callback;
-printf "%s is terminating, bye!\n" daemon_name
-
projects / helm.git / blobdiff