X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=helm%2Fhttp_getter%2Fhttp_getter.ml;fp=helm%2Fhttp_getter%2Fhttp_getter.ml;h=0000000000000000000000000000000000000000;hp=7c5fafa114a5cc5831dc83782f174d04cfa346d6;hb=869549224eef6278a48c16ae27dd786376082b38;hpb=89262281b6e83bd2321150f81f1a0583645eb0c8 diff --git a/helm/http_getter/http_getter.ml b/helm/http_getter/http_getter.ml deleted file mode 100644 index 7c5fafa11..000000000 --- a/helm/http_getter/http_getter.ml +++ /dev/null @@ -1,422 +0,0 @@ -(* - * 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_common;; -open Http_getter_misc;; -open Http_getter_types;; -open Http_getter_debugger;; -open Printf;; - - (* constants *) - -let common_headers = [ - "Cache-Control", "no-cache"; - "Pragma", "no-cache"; - "Expires", "0" -] - - (* HTTP queries argument parsing *) - -let parse_enc (req: Http_types.request) = - try - (match req#param "format" with - | "normal" -> Enc_normal - | "gz" -> Enc_gzipped - | s -> raise (Http_getter_bad_request ("Invalid format: " ^ s))) - with Http_types.Param_not_found _ -> Enc_normal -;; -let parse_patch (req: Http_types.request) = - match req#param "patch_dtd" with - | s when String.lowercase s = "yes" -> true - | s when String.lowercase s = "no" -> false - | s -> raise (Http_getter_bad_request ("Invalid patch_dtd value: " ^ s)) -;; -let parse_output_format (req: Http_types.request) = - match req#param "format" with - | s when String.lowercase s = "txt" -> Fmt_text - | s when String.lowercase s = "xml" -> Fmt_xml - | s -> raise (Http_getter_bad_request ("Invalid /ls format: " ^ s)) -;; -let parse_ls_uri = - let parse_ls_RE = Pcre.regexp "^(\\w+):(.*)$" in - let trailing_slash_RE = Pcre.regexp "/+$" in - fun (req: Http_types.request) -> - let baseuri = req#param "baseuri" in - let subs = - Pcre.extract ~rex:parse_ls_RE - (Pcre.replace ~rex:trailing_slash_RE baseuri) - in - match (subs.(1), subs.(2)) with - | "cic", uri -> Cic uri - | "theory", uri -> Theory uri - | _ -> raise (Http_getter_bad_request ("Invalid /ls baseuri: " ^ baseuri)) -;; - - (* global maps, shared by all threads *) - -let xml_map = new Http_getter_map.map Http_getter_env.xml_dbm in -let rdf_map = new Http_getter_map.map Http_getter_env.rdf_dbm in -let xsl_map = new Http_getter_map.map Http_getter_env.xsl_dbm in - -let save_maps () = xml_map#close; rdf_map#close; xsl_map#close in -let map_of_uri = function - | uri when is_xml_uri uri -> xml_map - | uri when is_rdf_uri uri -> rdf_map - | uri when is_xsl_uri uri -> xsl_map - | uri -> raise (Http_getter_unresolvable_URI uri) -in -let resolve uri = - try - (map_of_uri uri)#resolve uri - with Http_getter_map.Key_not_found _ -> - raise (Http_getter_unresolvable_URI uri) -in -let register uri = (map_of_uri uri )#add uri in -let return_all_foo_uris map doctype filter outchan = - (** return all URIs contained in 'map' which satisfy predicate 'filter'; URIs - are written in an XMLish format ('doctype' is the XML doctype) onto 'outchan' - *) - Http_daemon.send_basic_headers ~code:200 outchan; - Http_daemon.send_header "Content-Type" "text/xml" outchan; - Http_daemon.send_headers common_headers outchan; - Http_daemon.send_CRLF outchan; - output_string - outchan - (sprintf -" - - -<%s> -" - doctype - Http_getter_env.my_own_url - doctype - doctype); - map#iter - (fun uri _ -> - if filter uri then - output_string outchan (sprintf "\t\n" uri)); - output_string outchan (sprintf "\n" doctype) -in -let return_all_xml_uris = return_all_foo_uris xml_map "alluris" in -let return_all_rdf_uris = return_all_foo_uris rdf_map "allrdfuris" in -let return_ls = - let (++) (oldann, oldtypes, oldbody) (newann, newtypes, newbody) = - ((if newann > oldann then newann else oldann), - (if newtypes > oldtypes then newtypes else oldtypes), - (if newbody > oldbody then newbody else oldbody)) - in - let basepart_RE = - Pcre.regexp "^([^.]*\\.[^.]*)((\\.body)|(\\.types))?(\\.ann)?" - in - let (types_RE, types_ann_RE, body_RE, body_ann_RE) = - (Pcre.regexp "\\.types", Pcre.regexp "\\.types.ann", - Pcre.regexp "\\.body", Pcre.regexp "\\.body.ann") - in - let (slash_RE, til_slash_RE, no_slashes_RE) = - (Pcre.regexp "/", Pcre.regexp "^.*/", Pcre.regexp "^[^/]*$") - in - fun lsuri fmt outchan -> - let pat = - "^" ^ - (match lsuri with Cic p -> ("cic:" ^ p) | Theory p -> ("theory:" ^ p)) - in - let (dir_RE, obj_RE) = - (Pcre.regexp (pat ^ "/"), Pcre.regexp (pat ^ "(\\.|$)")) - in - let dirs = ref StringSet.empty in - let objs = Hashtbl.create 17 in - let store_dir d = - dirs := StringSet.add (List.hd (Pcre.split ~rex:slash_RE d)) !dirs - in - let store_obj o = - let basepart = Pcre.replace ~rex:basepart_RE ~templ:"$1" o in - let oldflags = - try - Hashtbl.find objs basepart - with Not_found -> (false, No, No) (* no ann, no types no body *) - in - let newflags = - match o with - | s when Pcre.pmatch ~rex:types_RE s -> (false, Yes, No) - | s when Pcre.pmatch ~rex:types_ann_RE s -> (true, Ann, No) - | s when Pcre.pmatch ~rex:body_RE s -> (false, No, Yes) - | s when Pcre.pmatch ~rex:body_ann_RE s -> (true, No, Ann) - | s -> (false, No, No) - in - Hashtbl.replace objs basepart (oldflags ++ newflags) - in - xml_map#iter (* BLEARGH Dbm module lacks support for fold-like functions *) - (fun key _ -> - match key with - | uri when Pcre.pmatch ~rex:dir_RE uri -> (* directory hit *) - let localpart = Pcre.replace ~rex:dir_RE uri in - if Pcre.pmatch ~rex:no_slashes_RE localpart then - store_obj localpart - else - store_dir localpart - | uri when Pcre.pmatch ~rex:obj_RE uri -> (* file hit *) - store_obj (Pcre.replace ~rex:til_slash_RE uri) - | uri -> () (* miss *)); - match fmt with - | Fmt_text -> - let body = - (List.fold_left - (fun s d -> sprintf "%sdir, %s\n" s d) "" - (StringSet.elements !dirs)) ^ - (Http_getter_misc.hashtbl_sorted_fold - (fun uri (annflag, typesflag, bodyflag) cont -> - sprintf "%sobject, %s, <%s,%s,%s>\n" - cont uri (if annflag then "YES" else "NO") - (string_of_ls_flag typesflag) (string_of_ls_flag bodyflag)) - objs "") - in - Http_daemon.respond - ~headers:(("Content-Type", "text/plain") :: common_headers) - ~body outchan - | Fmt_xml -> - let body = - sprintf -" - - - -%s - -" - Http_getter_env.my_own_url - ("\n" ^ - (String.concat - "\n" - (List.map - (fun d -> "
" ^ d ^ "
") - (StringSet.elements !dirs))) ^ "\n" ^ - (Http_getter_misc.hashtbl_sorted_fold - (fun uri (annflag, typesflag, bodyflag) cont -> - sprintf -"%s -\t -\t -\t - -" - cont uri (if annflag then "YES" else "NO") - (string_of_ls_flag typesflag) - (string_of_ls_flag bodyflag)) - objs "")) - in - Http_daemon.respond - ~headers:(("Content-Type", "text/xml") :: common_headers) - ~body outchan -in -let (index_line_sep_RE, index_sep_RE, trailing_types_RE, - heading_cic_RE, heading_theory_RE, - heading_rdf_cic_RE, heading_rdf_theory_RE) = - (Pcre.regexp "[ \t]+", Pcre.regexp "\n+", Pcre.regexp "\\.types$", - Pcre.regexp "^cic:", Pcre.regexp "^theory:", - Pcre.regexp "^helm:rdf.*//cic:", Pcre.regexp "^helm:rdf.*//theory:") -in -let update_from_server logmsg server_url = (* use global maps *) - debug_print ("Updating information from " ^ server_url); - let xml_url_of_uri = function - (* TODO missing sanity checks on server_url, e.g. it can contains $1 *) - | uri when (Pcre.pmatch ~rex:heading_cic_RE uri) -> - Pcre.replace ~rex:heading_cic_RE ~templ:server_url uri - | uri when (Pcre.pmatch ~rex:heading_theory_RE uri) -> - Pcre.replace ~rex:heading_theory_RE ~templ:server_url uri - | uri -> raise (Http_getter_invalid_URI uri) - in - let rdf_url_of_uri = function (* TODO as above *) - | uri when (Pcre.pmatch ~rex:heading_rdf_cic_RE uri) -> - Pcre.replace ~rex:heading_rdf_cic_RE ~templ:server_url uri - | uri when (Pcre.pmatch ~rex:heading_rdf_theory_RE uri) -> - Pcre.replace ~rex:heading_rdf_theory_RE ~templ:server_url uri - | uri -> raise (Http_getter_invalid_URI uri) - in - let log = ref (logmsg ^ "Processing server: " ^ server_url ^ "
\n") in - let (xml_index, rdf_index, xsl_index) = - (* TODO keeps index in memory, is better to keep them on temp files? *) - (http_get (server_url ^ "/" ^ Http_getter_env.xml_index), - http_get (server_url ^ "/" ^ Http_getter_env.rdf_index), - http_get (server_url ^ "/" ^ Http_getter_env.xsl_index)) - in - if (xml_index = None && rdf_index = None && xsl_index = None) then - debug_print (sprintf "Warning: useless server %s" server_url); - (match xml_index with - | Some xml_index -> - (log := !log ^ "Updating XML db ...
\n"; - List.iter - (fun l -> - try - (match Pcre.split ~rex:index_line_sep_RE l with - | [uri; "gz"] -> xml_map#add uri ((xml_url_of_uri uri) ^ ".xml.gz") - | [uri] -> xml_map#add uri ((xml_url_of_uri uri) ^ ".xml") - | _ -> log := !log ^ "Ignoring invalid line: " ^ l ^ "
\n") - with Http_getter_invalid_URI uri -> - log := !log ^ "Ignoring invalid XML URI: " ^ uri ^ "
\n") - (Pcre.split ~rex:index_sep_RE xml_index)) (* xml_index lines *) - | None -> ()); - (match rdf_index with - | Some rdf_index -> - (log := !log ^ "Updating RDF db ...
\n"; - List.iter - (fun l -> - try - (match Pcre.split ~rex:index_line_sep_RE l with - | [uri; "gz"] -> rdf_map#add uri ((rdf_url_of_uri uri) ^ ".xml.gz") - | [uri] -> rdf_map#add uri ((rdf_url_of_uri uri) ^ ".xml") - | _ -> log := !log ^ "Ignoring invalid line: " ^ l ^ "
\n") - with Http_getter_invalid_URI uri -> - log := !log ^ "Ignoring invalid RDF URI: " ^ uri ^ "
\n") - (Pcre.split ~rex:index_sep_RE rdf_index)) (* rdf_index lines *) - | None -> ()); - (match xsl_index with - | Some xsl_index -> - (log := !log ^ "Updating XSLT db ...
\n"; - List.iter - (fun l -> xsl_map#add l (server_url ^ "/" ^ l)) - (Pcre.split ~rex:index_sep_RE xsl_index); - log := !log ^ "All done!
\n") - | None -> ()); - debug_print "done with this server"; - !log -in - - (* thread action *) - -let callback (req: Http_types.request) outchan = - try - debug_print ("Connection from " ^ req#clientAddr); - debug_print ("Received request: " ^ req#path); - (match req#path with - | "/help" -> return_html_raw Http_getter_const.usage_string outchan - | "/getxml" | "/getxslt" | "/getdtd" | "/resolve" | "/register" -> - (let uri = req#param "uri" in (* common parameter *) - match req#path with - | "/getxml" -> - let enc = parse_enc req in - let patch = - try parse_patch req with Http_types.Param_not_found _ -> true - in - Http_getter_cache.respond_xml - ~url:(resolve uri) ~uri ~enc ~patch outchan - | "/getxslt" -> - let patch = - try parse_patch req with Http_types.Param_not_found _ -> true - in - Http_getter_cache.respond_xsl ~url:(resolve uri) ~patch outchan - | "/getdtd" -> - let patch = - try parse_patch req with Http_types.Param_not_found _ -> true - in - Http_getter_cache.respond_dtd - ~patch ~url:(Http_getter_env.dtd_dir ^ "/" ^ uri) outchan - | "/resolve" -> - (try - return_xml_raw - (sprintf "\n" (resolve uri)) - outchan - with Http_getter_unresolvable_URI uri -> - return_xml_raw "\n" outchan) - | "/register" -> - let url = req#param "url" in - register uri url; - return_html_msg "Register done" outchan - | _ -> assert false) - | "/update" -> - (Http_getter_env.reload (); (* reload servers list from servers file *) - xml_map#clear; rdf_map#clear; xsl_map#clear; - let log = - List.fold_left - update_from_server - "" (* initial logmsg: empty *) - (* reverse order: 1st server is the most important one *) - (List.rev !Http_getter_env.servers) - in - xml_map#sync; rdf_map#sync; xsl_map#sync; - return_html_msg log outchan) - | "/getalluris" -> - return_all_xml_uris - (fun uri -> - (Pcre.pmatch ~rex:heading_cic_RE uri) && - not (Pcre.pmatch ~rex:trailing_types_RE uri)) - outchan - | "/getallrdfuris" -> - (let classs = req#param "class" in - try - let filter = - let base = "^helm:rdf:www\\.cs\\.unibo\\.it/helm/rdf/" in - match classs with - | ("forward" as c) | ("backward" as c) -> - (fun uri -> Pcre.pmatch ~pat:(base ^ c) uri) - | c -> raise (Http_getter_invalid_RDF_class c) - in - return_all_rdf_uris filter outchan - with Http_getter_invalid_RDF_class c -> - raise (Http_getter_bad_request ("Invalid RDF class: " ^ c))) - | "/ls" -> return_ls (parse_ls_uri req) (parse_output_format req) outchan - | "/getempty" -> - Http_daemon.respond ~body:Http_getter_const.empty_xml outchan - | invalid_request -> - Http_daemon.respond_error ~status:(`Client_error `Bad_request) outchan); - debug_print "Done!\n" - with - | Http_types.Param_not_found attr_name -> - return_400 (sprintf "Parameter '%s' is missing" attr_name) outchan - | Http_getter_bad_request msg -> return_html_error msg outchan - | Http_getter_internal_error msg -> return_html_internal_error msg outchan - | Shell.Subprocess_error l -> - return_html_internal_error - (String.concat "
\n" - (List.map - (fun (cmd, code) -> - sprintf "Command '%s' returned %s" - cmd (string_of_proc_status code)) - l)) - outchan - | exc -> - return_html_error - ("Uncaught exception: " ^ (Printexc.to_string exc)) - outchan -in - - (* daemon initialization *) - -let main () = - Http_getter_env.dump_env (); - Unix.putenv "http_proxy" ""; - at_exit save_maps; - Sys.catch_break true; - try - Http_daemon.start' - ~timeout:(Some 600) ~port:Http_getter_env.port ~mode:`Thread callback - with Sys.Break -> () (* 'save_maps' already registered with 'at_exit' *) -in - -main () -