From: Stefano Zacchiroli Date: Wed, 8 Jan 2003 10:25:16 +0000 (+0000) Subject: new http_getter sources layout: X-Git-Tag: v0_3_99~71 X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=commitdiff_plain;h=43ddb7c4879cec9c9d69ca92aefb6677bcc5cfa2 new http_getter sources layout: - updated some README files - removed old perl stuff --- diff --git a/helm/http_getter/AUTHORS b/helm/http_getter/AUTHORS index 72c65aaa0..5eab6c071 100644 --- a/helm/http_getter/AUTHORS +++ b/helm/http_getter/AUTHORS @@ -1,2 +1,11 @@ -Claudio Sacerdoti Coen -Stefano Zacchiroli + +- current version (the OCaml one!): + + Stefano Zacchiroli + +- for the old Perl version: + + Claudio Sacerdoti Coen + Stefano Zacchiroli + Luca Padovani + diff --git a/helm/http_getter/ChangeLog b/helm/http_getter/ChangeLog index 20c36b475..6de4c521b 100644 --- a/helm/http_getter/ChangeLog +++ b/helm/http_getter/ChangeLog @@ -1 +1,2 @@ +08/01/2003: OCaml reimplementation available! 28/12/2000: First alpha release diff --git a/helm/http_getter/NEWS b/helm/http_getter/NEWS index 20c36b475..cbb967e21 100644 --- a/helm/http_getter/NEWS +++ b/helm/http_getter/NEWS @@ -1 +1,6 @@ -28/12/2000: First alpha release + +08/01/2003 + + Fully OCaml HTTP Getter is now available: go and burn the Perl implementation! + -- Zack + diff --git a/helm/http_getter/configure.in b/helm/http_getter/configure.in deleted file mode 100644 index 2412b1009..000000000 --- a/helm/http_getter/configure.in +++ /dev/null @@ -1,100 +0,0 @@ -AC_INIT(http_getter.pl.in) - -PACKAGE=helm_http_getter -MAJOR_VERSION=0 -MINOR_VERSION=1 -MICRO_VERSION=54 -VERSION=$MAJOR_VERSION.$MINOR_VERSION.$MICRO_VERSION - -DEFAULT_HELM_LIB_DIR=/usr/local/lib/helm - -AC_ARG_ENABLE( - defaults, - [ --enable-defaults[=ARG] if yes then use defaults (don't ask user) [default=auto]], - USE_DEFAULTS=$enableval, - USE_DEFAULTS=auto -) - -if test "x$prefix" != xNONE; then - RESOLVED_PREFIX=$prefix -else - RESOLVED_PREFIX=$ac_default_prefix -fi - -if test "x$exec_prefix" != xNONE; then - RESOLVED_EXEC_PREFIX=$exec_prefix -else - RESOLVED_EXEC_PREFIX=$RESOLVED_PREFIX -fi - -HELM_CGI_DIR=$RESOLVED_PREFIX/bin - -if test $USE_DEFAULTS = auto; then - AC_CHECK_PROG(HAVE_HELM_CONFIG, helm-config, yes, no) - if test $HAVE_HELM_CONFIG = yes; then - HELM_LIB_DIR=`helm-config --lib-dir` - else - USE_DEFAULTS=no - fi -fi - -if test $USE_DEFAULTS = no; then - echo - echo "\`helm-config' is not installed (or I can't find it in your path)." - echo "Please, insert the lib directory HELM..." - echo - echo -n "[[$DEFAULT_HELM_LIB_DIR]] ? " - read HELM_LIB_DIR - if test "x$HELM_LIB_DIR" = "x"; then - HELM_LIB_DIR=$DEFAULT_HELM_LIB_DIR - fi -elif test $USE_DEFAULTS = yes; then - HELM_LIB_DIR=$DEFAULT_HELM_LIB_DIR -fi - -AC_MSG_CHECKING(for $HELM_LIB_DIR/configuration.pl) -if test -f $HELM_LIB_DIR/configuration.pl; then - AC_MSG_RESULT(ok) -else - AC_MSG_RESULT(no) - AC_MSG_ERROR(please check your installation) -fi - -AC_PATH_PROG(PERL_BINARY,perl,no) -if test $PERL_BINARY = no ; then - AC_MSG_ERROR(Could not find perl) -fi - -dnl Perl modules checks -PERL_MODS="HTTP::Daemon HTTP::Status HTTP::Request LWP::UserAgent DB_File Compress::Zlib CGI" -PERL_INC=`perl -e 'print(join(" ",@INC))'` -for perl_mod in $PERL_MODS; do - AC_MSG_CHECKING("for perl module: $perl_mod") - perl_mod_file=`echo $perl_mod | sed -e 's/::/\//' -e 's/$/\.pm/'` - module_found="false" - for perl_lib_dir in $PERL_INC; do - if test -f "$perl_lib_dir/$perl_mod_file"; then - module_found="true" - AC_MSG_RESULT("found in $perl_lib_dir") - break - fi - done - if test "$module_found" != "true"; then - AC_MSG_ERROR("not found") - fi -done - -AC_SUBST(PACKAGE) -AC_SUBST(VERSION) -AC_SUBST(RESOLVED_PREFIX) -AC_SUBST(RESOLVED_EXEC_PREFIX) -AC_SUBST(HELM_LIB_DIR) -AC_SUBST(PERL_BINARY) -AC_SUBST(HELM_CGI_DIR) - -AC_OUTPUT([ - Makefile - http_getter.pl - helm_http_getter.spec -], chmod +x http_getter.pl) - diff --git a/helm/http_getter/helm-http-getter b/helm/http_getter/helm-http-getter deleted file mode 100755 index 2e8488838..000000000 --- a/helm/http_getter/helm-http-getter +++ /dev/null @@ -1,53 +0,0 @@ -#!/bin/sh -# -# http-getter: Starts the http-getter for project HELM -# -# Version: /home/lpadovan/http_getter/http_getter.pl 0.1 -# -# Author: Claudio Sacerdoti Coen -# -# chkconfig: - 16 84 -# description: this is an implementation of an HELM getter as a \ -# light http daemon. It allows URIs to be mapped to URLs \ -# and documents to be retrieved. -# processname: http_getter.pl -# config: /local/etc/helm/configuration.xml - -# Source function library. -. /etc/rc.d/init.d/functions - -RETVAL=0 - -# See how we were called. -case "$1" in - start) - echo -n "Starting HELM http-getter: " - export HELM_LIB_DIR=/projects/helm/on-line/local/lib/helm - daemon /projects/helm/http_getter/http_getter.pl & - RETVAL=$? - echo - [ $RETVAL -eq 0 ] && touch /var/lock/subsys/http_getter.pl - ;; - stop) - echo -n "Stopping HELM http-getter: " - killproc http_getter.pl - RETVAL=$? - [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/http_getter.pl - echo - ;; - status) - status http_getter.pl - RETVAL=$? - ;; - restart) - $0 stop - $0 start - RETVAL=$? - ;; - *) - echo "Usage: $0 {start|stop|status|restart}" - exit 1 -esac - -exit $RETVAL - diff --git a/helm/http_getter/helm_http_getter.spec.in b/helm/http_getter/helm_http_getter.spec.in deleted file mode 100644 index dda2b975d..000000000 --- a/helm/http_getter/helm_http_getter.spec.in +++ /dev/null @@ -1,31 +0,0 @@ -Summary: The HELM http getter -Name: @PACKAGE@ -Version: @VERSION@ -Release: 1 -Copyright: GPL -URL: http://www.cs.unibo.it/helm -Packager: Claudio Sacerdoti Coen -Requires: helm_configuration >= 0.0.2, helm_data >= 0.0.2, perl-libwww-perl, perl-URI, MIME-Base64, perl-HTML-Parser, perl-XML-Parser -Group: Applications/Publishing -Source: www.cs.unibo.it:/helm/@PACKAGE@-@VERSION@.tar.gz -%description -HELM (Hypertextual Electronic Library of Mathematics) is a project aimed -at the creation of tools for the development and exploitation of a huge -distributed library of formal mathematical knowledge. This package holds -the getter used to map logical names into phisical names and download -the required files. -For more information see http://www.cs.unibo.it/helm - -%prep -%setup - -%build -./configure --enable-defaults -make - -%install -make install - -%files -%doc AUTHORS COPYING ChangeLog NEWS README -%attr(755,root,root) /usr/local/bin/http_getter.pl diff --git a/helm/http_getter/http_getter.pl.in b/helm/http_getter/http_getter.pl.in deleted file mode 100755 index e9d1f4a3e..000000000 --- a/helm/http_getter/http_getter.pl.in +++ /dev/null @@ -1,964 +0,0 @@ -#!@PERL_BINARY@ - -# Copyright (C) 2000, 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/. - -#use strict; - -my $VERSION = "@VERSION@"; - -# various variables -my ($HELM_LIB_PATH); -my $cgi_dir = "@HELM_CGI_DIR@"; -my (%xml_map, %rdf_map, %xslt_map); - -# First of all, let's load HELM configuration -use Env; -my $HELM_LIB_DIR = $ENV{"HELM_LIB_DIR"}; -# this should be the only fixed constant -my $DEFAULT_HELM_LIB_DIR = "@HELM_LIB_DIR@"; -if (defined ($HELM_LIB_DIR)) { - $HELM_LIB_PATH = $HELM_LIB_DIR."/configuration.pl"; -} else { - $HELM_LIB_PATH = $DEFAULT_HELM_LIB_DIR."/configuration.pl"; -} - -# next require defines: $helm_dir, $html_link, $dtd_dir, $uris_dbm, $indexname -require $HELM_LIB_PATH; - -# TEMP: TODO put these vars in configuration file configuration.xml -# -my $cachemode = $ENV{'HTTP_GETTER_CACHE_MODE'} || - 'gzipped'; -if (($cachemode ne 'gzipped') and ($cachemode ne 'normal')) { - die "Invalid HTTP_GETTER_CACHE_MODE environment variable, must be". - "'normal' or 'gzipped'\n"; -} - -$helm_rdf_dir = $ENV{'HTTP_GETTER_RDF_DIR'} || $helm_rdf_dir; -$rdf_dbm = $ENV{'HTTP_GETTER_RDF_DBM'} || $rdf_dbm; -$xslt_dbm = $ENV{'HTTP_GETTER_XSLT_DBM'} || $xslt_dbm; -$rdf_indexname = $ENV{'HTTP_GETTER_RDF_INDEXNAME'} || $rdf_indexname; -$xslt_indexname = $ENV{'HTTP_GETTER_XSLT_INDEXNAME'} || $xslt_indexname; -$servers_file = $ENV{'HTTP_GETTER_SERVERS_FILE'} || $servers_file; -$uris_dbm = $ENV{'HTTP_GETTER_URIS_DBM'} || $uris_dbm; -$dtdbaseurl = $ENV{'HTTP_GETTER_DTD_BASE_URL'} || $dtdbaseurl; -$getterport = $ENV{'HTTP_GETTER_PORT'} || $getterport; - -# - -# Let's override the configuration file -$style_dir = $ENV{"HELM_STYLE_DIR"} if (defined ($ENV{"HELM_STYLE_DIR"})); -$dtd_dir = $ENV{"HELM_DTD_DIR"} if (defined ($ENV{"HELM_DTD_DIR"})); - -use HTTP::Daemon; -use HTTP::Status; -use HTTP::Request; -use LWP::UserAgent; -use DB_File; -use Compress::Zlib; -use CGI; -use URI; -use URI::Escape; - -#CSC: mancano i controlli sulle condizioni di errore di molte funzioni -#CSC: ==> non e' robusto -#CSC: altra roba da sistemare segnata con CSC - -my $d = new HTTP::Daemon LocalPort => $getterport - or die "Error: port $getterport not available."; -my $myownurl = $d->url; - -# Let's patch the returned URL -$myownurl =~ s/\/$//; # chop the final slash -my $myownport = $myownurl; -$myownport =~ s/http:\/\/(.*):(.*)/$2/; -$myownurl =~ s/http:\/\/(.*):(.*)/$1/; -($myownurl) = gethostbyname($myownurl); -$myownurl = "http://".$myownurl.":".$myownport; - -tie(%xml_map, 'DB_File', $uris_dbm, O_RDWR, 0664); # open dbs -tie(%rdf_map, 'DB_File', $rdf_dbm, O_RDWR, 0664); -tie(%xslt_map, 'DB_File', $xslt_dbm, O_RDWR, 0664); - -print "\n"; -print "HTTP Getter $VERSION\n"; # print hello information -print "Please contact me at: \n"; -print "\n"; -print "servers_file: $servers_file\n"; -print "helm_dir: $helm_dir\n"; -print "helm_rdf_dir: $helm_rdf_dir\n"; -print "style_dir: $style_dir\n"; -print "dtd_dir: $dtd_dir\n"; -print "urls_of_uris db: $uris_dbm\n"; -print "rdf db: $rdf_dbm\n"; -print "xslt db: $xslt_dbm\n"; -print "cache mode: $cachemode\n"; -print "indexname: $indexname\n"; -print "rdf_indexname: $rdf_indexname\n"; -print "xslt_indexname: $xslt_indexname\n"; -print "dtdbaseurl: $dtdbaseurl\n"; -print "getterport: $getterport\n"; -print "\n"; - -$SIG{CHLD} = "IGNORE"; # do not accumulate defunct processes -$SIG{USR1} = \&update; # sent by the child to make the parent update - -while (my $c = $d->accept) { - if (fork() == 0) { - while (my $r = $c->get_request) { - #CSC: mancano i controlli di sicurezza - - my $http_method = $r->method; - my $http_path = $r->url->path; - my $http_query = uri_unescape($r->url->query); - my $cgi = new CGI("$http_query"); - my $inputuri = $cgi->param('uri'); - print "\nRequest: ".$r->url."\n\n"; - - print "\nUnescaped query: ".$http_query."\n"; - - # "getxml" works with rdf uris - if ($http_method eq 'GET' and $http_path eq "/getxml") { - # finds the uri, url and filename - - my $answerformat = $cgi->param('format'); - my $patch_dtd = $cgi->param('patch_dtd'); - $answerformat = "" if (not defined($answerformat)); - $patch_dtd = "yes" if (not defined($patch_dtd)); - if (($answerformat ne "gz") and ($answerformat ne "normal") - and ($answerformat ne "")) { - die "Wrong output format: $answerformat, must be 'normal' ". - "or 'gz'\n"; - } - if (($patch_dtd ne "yes") and ($patch_dtd ne "no") - and ($patch_dtd ne "")) { - die "Wrong param, patch_dtd must be 'yes' or 'no'\n"; - } - - my $filename = $inputuri; - my $prefix; - if (not isRdfUri($inputuri)) { # standad cic: or theory: uri - $filename =~ s/^cic:(.*)/$1/; - $filename =~ s/^theory:(.*)/$1/; - } else { # rdf uri - # The "helm:rdf/<<...>>//cic:" prefix is kept, but quoted - # (so that a "helm:rdf/<<...>>//cic:" dir is created - $prefix = $filename; - $filename =~ s/^(.*)\/\/cic:(.*)/$2/; - $filename =~ s/^(.*)\/\/theory:(.*)/$2/; - $prefix =~ s/\Q$filename\E//; - $prefix =~ s/_/__/g; - $prefix =~ s/\//_/g; - $filename = $prefix.$filename; - } - - my $url = resolve ($inputuri); # resolve uri in url - if (not defined($url)) { # uri not found in uri2url map - die "NOT FOUND: uri \"$inputuri\" can't be resolved\n"; - $c->send_error(RC_NOT_FOUND) - } else { # uri found and mapped to url - my $extension; # file extension - if ($url =~ /\.xml$/) { # non gzipped file - $extension = ".xml"; - } elsif ($url =~ /\.xml\.gz$/) { # gzipped file - $extension = ".xml.gz"; - } else { # error: unknown extension - die "unexpected extension in url: $url, might be '.xml'". - "or '.xml.gz'"; - } - - if (not isRdfUri ($inputuri)) { # save in uri std cache dir - $filename = $helm_dir.$filename.$extension; - } else { # save in rdf metadata cache dir - $filename = $helm_rdf_dir."/".$filename.$extension; - } - - print_request($inputuri,$url,$filename); - - # Retrieves the file - my $ciccontent = download($patch_dtd,$url,$filename,$answerformat); - - if ($answerformat eq "normal") { # answer the client in text/xml - answer($c,$ciccontent,"text/xml",""); - } else { # answer the client in text/xml, gzip encoding - answer($c,$ciccontent,"text/xml","x-gzip"); - } - } - - # "/register" does not work with rdf uris - } elsif ($http_method eq 'GET' and $http_path eq "/register") { - my $inputurl = $cgi->param('url'); - print "Register requested...\n"; - $xml_map{$inputuri}=$inputurl; - - # Now let's clean the cache - my $cicfilename = $inputuri; - $cicfilename =~ s/cic:(.*)/$1/; - $cicfilename =~ s/theory:(.*)/$1/; - - print "Unlinking ".$helm_dir.$cicfilename.".xml[.gz]\n"; - unlink ($helm_dir.$cicfilename.".xml"); - unlink ($helm_dir.$cicfilename.".xml.gz"); - - kill(USR1,getppid()); # signal changes to parent - untie %xml_map; - print "done.\n"; - html_nice_answer($c,"Register done"); - - # "/resolve" works with rdf uri - } elsif ($http_method eq 'GET' and $http_path eq "/resolve") { - #my $outputurl = $xml_map{$inputuri}; - my $outputurl = resolve($inputuri); - $outputurl = "" if (not defined($outputurl)); - $cont = "\n\n"; - if ($outputurl eq "") { - $cont .= "\n"; - } else { - $cont .= "\n"; - } - answer($c,$cont,"text/xml",""); - - } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") { - - my $filename = $inputuri; - $filename = $dtd_dir."/".$filename; - print "DTD: $inputuri ==> ($filename)\n"; - if (stat($filename)) { - print "Using local copy\n"; - open(FD, $filename) or die "Cannot open $filename\n"; - $cont = ""; - while() { - # Vary bad heuristic for substituion of absolute URLs - # for relative ones - s/ENTITY (.*) SYSTEM\s+"/ENTITY $1 SYSTEM "$myownurl\/getdtd?uri=/g; - $cont .= $_; - } - close(FD); - answer($c,$cont,"text/xml",""); - } else { - die "Could not find DTD!"; - } - - } elsif ($http_method eq 'GET' and $http_path eq "/getxslt") { - - $url = $xslt_map{$inputuri}; - print "Downloading XSLT ...\n"; - helm_wget($tmp_dir, $url); - print "XSLT downloaded!\n"; - $inputuri =~ s/.*\///; - my $filename = $tmp_dir . "/" . $inputuri; - my $cont; - die "Could not find XSLT!\n" unless stat($filename); - open(FD, $filename) or die "Can't open xslt local copy: '$filename'\n"; - while() { - s/xsl:import\s+href="/xsl:import href="$myownurl\/getxslt?uri=/g; - s/xsl:include\s+href="/xsl:include href="$myownurl\/getxslt?uri=/g; - $cont .= $_; - } - close(FD); - answer($c, $cont, "text/xml", ""); - unlink $filename or - print "Can't unlink XSLT temp file '$filename'"; - -# -# my $filename = $inputuri; -# $filename = $style_dir."/".$filename; -# print "XSLT: $inputuri ==> ($filename)\n"; -# if (stat($filename)) { -# print "Using local copy\n"; -# open(FD, $filename) or die "Cannot open $filename\n"; -# $cont = ""; -# while() { -# # Vary bad heuristic for substituion of absolute URLs -# # for relative ones -# s/xsl:import\s+href="/xsl:import href="$myownurl\/getxslt?uri=/g ; -# s/xsl:include\s+href="/xsl:include href="$myownurl\/getxslt?uri=/g ; -# $cont .= $_; -# } -# close(FD); -# answer($c,$cont,"text/xml",""); -# } else { -# die "Could not find XSLT!"; -# } -# - - # "/update" works with rdf uri - } elsif ($http_method eq 'GET' and $http_path eq "/update") { - # rebuild urls_of_uris db and rdf uris db - print "Update requested...\n"; - update_dbs(); - kill(USR1,getppid()); # signal changes to parent - print " done\n"; - html_nice_answer($c,"Update done"); - - # "/getalluris" does not work with rdf uris - } elsif ($http_method eq 'GET' and $http_path eq "/getalluris") { - # send back all the keys in xml - print "BASEURI $baseuri, FORMAT $outype\n"; - $cont = getalluris(); - answer($c,$cont,"text/xml",""); - - # "/getallrdfuris" - } elsif ($http_method eq 'GET' and $http_path eq "/getallrdfuris") { - # send back all the keys in xml - my $class = $cgi->param('class'); - print "BASEURI $baseuri, FORMAT $outype, CLASS $class\n"; - $cont = getallrdfuris($class); - answer($c,$cont,"text/xml",""); - - } elsif ($http_method eq 'GET' and $http_path eq "/ls") { - # send back keys that begin with a given uri - my ($uritype,$uripattern,$uriprefix); - my $baseuri = $cgi->param('baseuri'); - chop $baseuri if ($baseuri =~ /.*\/$/); # remove trailing "/" - # output type, might be 'txt' or 'xml': - my $outype = $cgi->param('format'); - $uripattern = $baseuri; - $uripattern =~ s/^.*:(.*)/$1/; - if ($baseuri =~ /^cic:/) { - $uritype = "cic"; - } elsif ($baseuri =~ /^theory:/) { - $uritype = "theory"; - } else { - $uritype = "invalid"; - } - if ($uritype ne "invalid") { # uri is valid - if (($outype ne 'txt') and ($outype ne 'xml')) { # invalid out type - print "Invalid output type specified: $outype\n"; - html_nice_answer($c,"Invalid output type, must be ". - "'txt' or 'xml'"); - } else { # valid output - print "BASEURI $baseuri, FORMAT $outype\n"; - $cont = finduris($uritype,$uripattern,$outype); - if ($outype eq 'txt') { - answer($c,$cont,"text/plain",""); - } elsif ($outype eq 'xml') { - answer($c,$cont,"text/xml",""); - } else { - die "Internal error, exiting!"; - } - } - } else { # invalid uri - print "Invalid uri: $baseuri, may begin with 'cic:', ". - "'theory:' or '*:'\n"; - html_nice_answer($c,"Invalid uri , must begin with ". - "'cic:' or 'theory:'"); - } - - } elsif ($http_method eq 'GET' and $http_path eq "/help") { - # help request - print "Help requested!\n"; - html_nice_answer($c,"HTTP Getter Version: $VERSION"); - - } elsif ($http_method eq 'GET' and $http_path eq "/getempty") { - # return an empty, but valid, xml document - my $emptyxml = < - -]> - -EOXML - answer($c, $emptyxml, "", ""); - - } elsif ($http_method eq 'GET' and $http_path =~ /\.cgi$/) { - # cgi handling - print "CGI requested!\n"; - if ($http_path !~ /^\/[^\/]*\.cgi$/) { - html_nice_answer($c,"Invalid CGI name: $http_path, ". - "you can't request CGI that contain a slash in the name\n"); - } elsif (stat "$cgi_dir"."$http_path") { - if (not -x "$cgi_dir/$http_path") { - html_nice_answer($c,"CGI $http_path found but not ". - "executable\n"); - } else { # exec CGI and anser back its output - my %old_ENV = %ENV; - %ENV = (); - $ENV{'QUERY_STRING'} = $http_query; - my $cgi_output = `$cgi_dir/$http_path`; - answer($c,$cgi_output,"",""); - %ENV = %old_ENV; - } - } else { - html_nice_answer($c,"CGI '$http_path' not found ". - "in CGI dir '$cgi_dir'"); - } - - } else { # unsupported request - print "\n"; - print "INVALID REQUEST!!!!!\n"; - print "(PATH: ",$http_path,", "; - print "QUERY: ",$http_query,")\n"; - $c->send_error(RC_FORBIDDEN) - } - - print "\nRequest solved: ".$r->url."\n\n"; - } - - $c->close; - undef($c); - print "\nCONNECTION CLOSED\n\n"; - exit; - } # fork -} - -#================================ - -sub isRdfUri { # return true if the uri is an rdf uri, false otherwise -# typycal rdf uri: -# helm:rdf/cic:www.cs.unibo.it/helm/rdf/foo_schema//cic:\ -# /Coq/Init/Logic/True_rec.con.types -# -# the format is "helm:rdf/://" -# - my ($uri) = @_; - if ($uri =~ /^helm:rdf(.*):(.*)\/\/(.*)/) { - return 1; - } else { - return 0; - } -} - -sub resolve { # resolve an uri in a url, work both with standard cic: or theory: - # uris and rdf uris - print "RESOLVE subroutine\n"; - my ($uri) = @_; - print "GIVEN URI: \"$uri\"\n"; - if (isRdfUri ($uri)) { # rdf uri, resolve using rdf db - print "IS A RDF URI\n"; - print "I WILL RETURN '$rdf_map{$uri}'\n"; - return ($rdf_map{$uri}); - } else { # standard cic: or theory: uri, resolve using std uri db - print "IS NOT A RDF URI\n"; - print "I WILL RETURN '$xml_map{$uri}'\n"; - return ($xml_map{$uri}); - } -} - -sub getalluris { # get all the keys whose prefix is cic - my $content = ""; - my ($uri); - my $debug=1; # for debug - - $content .= '' . "\n"; - $content .= "" . "\n\n"; - $content .= "\n"; - foreach $uri (sort (keys(%xml_map))) { # select matching uris - if ($uri =~ /^cic:/ && not $uri =~ /.types$/) { - print "GETALLURI: $uri\n" if defined($debug); - $content .= "\t\n"; - } - } - $content .= "\n"; - return $content; -} - -sub getallrdfuris { - my $class = $_[0]; - my $content = ""; - my ($uri); - my $debug=1; # for debug - - $content .= '' . "\n"; - $content .= "" . "\n\n"; - $content .= "\n"; - foreach $uri (sort (keys(%rdf_map))) { - if ($class eq "forward" && - $uri =~ /^helm:rdf:www.cs.unibo.it\/helm\/rdf\/forward/ - || - $class eq "backward" && - $uri =~ /^helm:rdf:www.cs.unibo.it\/helm\/rdf\/backward/) { - print "GETALLRDFURI: $uri\n" if defined($debug); - $content .= "\t\n"; - } - } - $content .= "\n"; - return $content; -} - -sub finduris { # find uris for cic and theory trees generation - my ($uritype,$uripattern,$format) = @_; - my $content = ""; - my ($uri,$localpart,$basepart,$dirname,$suffix,$flags,$key); - my (@itemz,@already_pushed_dir); - my (%objects,%dirs); # map uris to suffixes' flags - my $debug=1; # for debug - - print "FINDURIS, uritype: $uritype, uripattern: $uripattern, ". - "format: $format\n\n" if defined($debug); - - if (($uritype eq "cic") or ($uritype eq "theory")) { - # get info only of one type: cic or theory - foreach (keys(%xml_map)) { # select matching uris - $uri = $_; - if ($uri =~ /^$uritype:$uripattern(\/|$|\.)/) { - if ($uri =~ /^$uritype:$uripattern\//) { # directory match - $localpart = $uri; - $localpart =~ s/^$uritype:$uripattern\/(.*)/$1/; - } elsif ($uri =~ /^$uritype:$uripattern($|\.)/) { # file match - $localpart = $uri; - $localpart =~ s/^.*\/([^\/]*)/$1/; - } else { - die "Internal error, seems that requested match is none of ". - "directory match or file match"; - } - print "LOCALPART: $localpart\n" if defined($debug); - - if ($localpart =~ /^[^\/]*$/) { # no slash, an OBJECT - $basepart = $localpart; - $basepart =~ s/^([^.]*\.[^.]*)((\.body)|(\.types))?(\.ann)?/$1/; - # remove exts .types, .body, - # .types.ann or .body.ann - $flags = $objects{$basepart}; # get old flags - if ($localpart =~ /\.ann$/) { - $flags = add_flag("ann","YES",$flags); - } else { - $flags = add_flag("ann","NO",$flags); - } - if ($localpart =~ /\.types$/) { - $flags = add_flag("types","YES",$flags); - } elsif ($localpart =~ /\.types\.ann$/) { - $flags = add_flag("types","ANN",$flags); - } else { - $flags = add_flag("types","NO",$flags); - } - if ($localpart =~ /\.body$/) { - $flags = add_flag("body","YES",$flags); - } elsif ($localpart =~ /\.body\.ann$/) { - $flags = add_flag("body","ANN",$flags); - } else { - $flags = add_flag("body","NO",$flags); - } - $objects{$basepart} = $flags; # save new flags - } else { # exists at least one slash, a DIR - ($dirname) = split (/\//, $localpart); - $dirs{$dirname} = ""; # no flags requirement for dir - } - } - } - } else { - die "getter internal error: unsupported uritype: \"$uritype\""; - } - # now generate OUTPUT: - # output will be saved in $content - if ($format eq "txt") { # TXT output - foreach $key (sort(keys %dirs)) { - $content .= "dir, " . $key . "\n"; - } - foreach $key (sort(keys %objects)) { - $content .= "object, $key, " . $objects{$key} . "\n"; - } - } elsif ($format eq "xml") { # XML output - $content .= '' . "\n"; - $content .= "" . "\n\n"; - $content .= "\n"; - foreach $key (sort(keys %dirs)) { - $content .= "\t
$key
\n"; - } - foreach $key (sort(keys %objects)) { - $content .= "\t\n"; - $flags = $objects{$key}; - $flags =~ s/^<(.*)>$/$1/; - my ($annflag,$typesflag,$bodyflag) = split /,/,$flags; - $content .= "\t\t\n"; - $content .= "\t\t\n"; - $content .= "\t\t\n"; - $content .= "\t\n"; - } - $content .= "\n"; - } else { # may not enter this branch - die "Getter internal error: invalid format received by finduris sub"; - } - return $content; -} - -sub add_flag { -# manage string like: "" -# "ann_flag" may be one of "ann_YES", "ann_NO" -# "type_flag" may be one of "types_NO", "types_YES", "types_ANN" -# "body_flag" may be one of "body_NO", "body_YES", "body_ANN" -# when adding a flag the max between the current flag and the new flag -# is taken, the orders are ann_NO < ann_YES, types_NO < types_YES < -# types_ANN and body_NO < body_YES < body_ANN - my ($flagtype,$newflag,$str) = @_; - $str = "<,,>" if ($str eq ""); - ($str =~ s/^<(.*,.*,.*)>$/$1/) or die "Internal error: ". - "wrong string format for flag adding in $str"; - my ($annflag,$typeflag,$bodyflag) = split /,/,$str; - if ($flagtype eq "ann") { # ANN flag handling - if ($newflag eq "YES") { - $annflag = "YES"; - } elsif ($newflag eq "NO") { - $annflag = "NO" unless ($annflag eq "YES"); - } else { - die "Internal error: annflag must be \"YES\" or \"NO\""; - } - } elsif ($flagtype eq "types") { # TYPES flag handling - if ($newflag eq "ANN") { - $typeflag = "ANN"; - } elsif ($newflag eq "YES") { - $typeflag = "YES" unless ($typeflag eq "ANN"); - } elsif ($newflag eq "NO") { - $typeflag = "NO" - unless (($typeflag eq "ANN") or ($typeflag eq "YES")); - } else { - die "Internal error: typeflag must be \"YES\", \"NO\" or \"ANN\""; - } - } elsif ($flagtype eq "body") { # BODY flag handling - if ($newflag eq "ANN") { - $bodyflag = "ANN"; - } elsif ($newflag eq "YES") { - $bodyflag = "YES" unless ($bodyflag eq "ANN"); - } elsif ($newflag eq "NO") { - $bodyflag = "NO" - unless (($bodyflag eq "ANN") or ($bodyflag eq "YES")); - } else { - die "Internal error: typeflag must be \"YES\", \"NO\" or \"ANN\""; - } - } else { - die "Internal error: unsupported flagtype \"$flagtype\""; - } - $str = "<$annflag,$typeflag,$bodyflag>"; -} - -#CSC: Too much powerful: creates even /home, /home/users/, ... -#CSC: Does not raise errors if could not create dirs/files -sub mkdirs -{ - my ($pathname) = @_; - my @dirs = split /\//,$pathname; - my $tmp; - foreach $dir (@dirs) { - $tmp = ((defined($tmp)) ? $tmp."\/".$dir : ""); - mkdir($tmp,0777); - } - rmdir($tmp); -} - -sub print_request -{ - my ($uri,$url,$filename) = @_; - print "\n"; - print "uri: $uri\n"; - print "url: $url\n"; - print "filename: $filename\n\n"; - print "\n"; -} - -sub gunzip { # gunzip a file and return the deflated content - my ($filename) = @_; - - my ($gz, $buffer, $cont); - - print "deflating $filename ...\n"; - $gz = gzopen($filename, "r") - or die "Cannot open gzip'ed file $filename: $gzerrno"; - $cont = ""; - while ( $gz->gzread($buffer) > 0 ) { - $cont .= $buffer; - } - die "Error while reading : $gzerrno\n" if $gzerrno != Z_STREAM_END ; - $gz->gzclose(); - - return $cont; -} - -sub gzip { # gzip the content argument and save it to filename argument - my ($cont, $filename) = @_; - #my $debug=1; # debug only - - print "gzopening $filename ...\n" if (defined($debug)); - my $gz = gzopen($filename, "w") - or die "Cannot gzopen for writing file $filename: $gzerrno"; - print "gzwriting ...\n" if (defined($debug)); - $gz->gzwrite($cont) or die "error writing: $gzerrno, exiting!\n"; - print "gzclosing ...\n" if (defined($debug)); - $gz->gzclose(); -} - -sub download { - my ($patch_dtd,$url,$filename,$format) = @_; - my ($gz, $buffer); - -# print "DOWNLOAD subs receives url: \"$url\"\n"; -# print "DOWNLOAD subs receives filename: \"$filename\"\n"; - - my $resourcetype; # retrieve mode: "normal" (.xml) or "gzipped" (.xml.gz) - if ($filename =~ /\.xml$/) { # set retrieve mode - $resourcetype = "normal"; - } elsif ($filename =~ /\.xml\.gz$/) { - $resourcetype = "gzipped"; - } else { - die "Unsupported download extension, might be '.gz' or '.xml'\n"; - } - my $basefname = $filename; - $basefname =~ s/\.gz$//; # get base resource name removing trailing .gz - $cont = ""; # modified by side-effect by the callback function - - my $localfname=""; - if (stat($basefname)) { - $localfname=$basefname; - } elsif (stat($basefname.".gz")) { - $localfname=$basefname.".gz"; - } - if ($localfname ne "") { # we already have local copy of requested file - # check both possible cache entry: gzipped or normal - print "Using local copy.\n"; - if ($localfname =~ /\.xml\.gz$/) { # deflating cached file and return it - $cont = gunzip($localfname); - } elsif ($localfname =~ /\.xml$/) { # just return cached file - open(FD, $localfname) or die "Cannot open $localfname"; - while() { $cont .= $_; } - close(FD); - } else { # error - die "Internal error: unexpected file name $localfname," - ."must end with '.gz' or '.xml.gz'\n"; - } - } else { # download file from net - print "Downloading file ...\n"; # download file - my $ua = LWP::UserAgent->new; - my $request = HTTP::Request->new(GET => "$url"); - my $response = $ua->request($request, \&callback); - - # cache retrieved file to disk - # TODO: inefficent, I haven't yet undestood how to deflate - # in memory gzipped file, without call "gzopen" - print "Storing file ...\n"; -# print "Making dirs ...\n"; - mkdirs($filename); -# print "Opening tmp file for writing ...\n"; - open(FD, ">".$filename.".tmp") or die "Cannot open $filename.tmp\n"; -# print "Writing on tmp file ...\n"; - print FD $cont; -# print "Closing tmp file ...\n"; - close(FD); - - # handle cache conversion normal->gzipped or gzipped->normal as user choice - print "cachemode:$cachemode, resourcetype:$resourcetype\n" - if (defined($debug)); - if (($cachemode eq 'normal') and ($resourcetype eq 'normal')) { - # cache the file as is - rename "$filename.tmp", $filename; - } elsif (($cachemode eq 'gzipped') and ($resourcetype eq 'gzipped')) { - # cache the file as is - # and update the $cont variabile with deflated content - rename "$filename.tmp", $filename; - $cont = gunzip($filename); - } elsif (($cachemode eq 'normal') and ($resourcetype eq 'gzipped')) { - # deflate cache entry - # and update $cont - open(FD, "> $basefname") or die "cannot open $basefname\n"; - $cont = gunzip($filename.".tmp"); - print FD $cont; - close(FD); - unlink "$filename.tmp"; # delete old gzipped file - } elsif (($cachemode eq 'gzipped') and ($resourcetype eq 'normal')) { - # compress cache entry - print "gzipping ...\n" if (defined($debug)); - gzip($cont, $basefname.".gz"); - unlink "$filename.tmp"; # delete old uncompressed file - } else { - die "Internal error, unsopported cachemode, resourcetype couple\n"; - } - # $cont now contained uncompressed data - } - if ($patch_dtd eq "yes") { - $cont =~ s/DOCTYPE (.*) SYSTEM\s+"$dtdbaseurl\//DOCTYPE $1 SYSTEM "$myownurl\/getdtd?uri=/g; - } - if ($format eq "gz") { - gzip($cont,"$basefname.tmp"); - open (TMP, "< $basefname.tmp") - or die "Can't open tempfile: $filename.tmp, exiting!\n"; - $cont = ""; - while() { - $cont .= $_; - } - close TMP; - unlink ($basefname . ".tmp") or - die "cannot unlink temporary file: $basefname.tmp\n"; - } - - return $cont; -} - -sub answer { -# answer the client setting content, Content-Type and Content-Enconding -# of the answer - my ($c,$cont,$contype,$contenc) = @_; - my $res = new HTTP::Response; - $res->content($cont); - $res->push_header("Content-Type" => $contype) - unless ($contype eq ""); - $res->push_header("Content-Encoding" => $contenc) - unless ($contenc eq ""); - $res->push_header("Cache-Control" => "no-cache"); - $res->push_header("Pragma" => "no-cache"); - $res->push_header("Expires" => "0"); - $c->send_response($res); - $c->force_last_request(); -} - -sub html_nice_answer { -# answer the client whith a nice html document - my ($c,$content) = @_; - $content = "

$content

"; - answer($c,$content,"text/html",""); -} - -sub callback { - my ($data) = @_; - $cont .= $data; -} - -sub helm_wget { -# retrieve a file from an url and write it to a temp dir -# used for retrieve resource index from servers - $cont = ""; - my ($prefix, $URL) = @_; - my $ua = LWP::UserAgent->new; - my $request = HTTP::Request->new(GET => "$URL"); - my $response = $ua->request($request, \&callback); - my ($filename) = reverse (split "/", $URL); # get filename part of the URL - open (TEMP, "> $prefix/$filename") - || die "Cannot open temporary file: $prefix/$filename\n"; - print TEMP $cont; - close TEMP; -} - -sub update { -# retie dbs - untie %xml_map; - tie(%xml_map, 'DB_File', $uris_dbm, O_RDWR, 0664); - untie %rdf_map; - tie(%rdf_map, 'DB_File', $rdf_dbm, O_RDWR, 0664); - untie %xslt_map; - tie(%xslt_map, 'DB_File', $xslt_dbm, O_RDWR, 0664); -} - -sub update_dbs { -# rebuild dbs fetching resource indexes from servers. -# Rebuild urls_of_uris db (1), rdf db (2) and xslt db (3) - my ( - $server, $idxfile, $rdf_idxfile, $uri, $url, $comp, $line, - @servers, - %urls_of_uris, %rdf, %xslt # local proxy of dbs - ); - - untie %xml_map; - untie %rdf_map; - untie %xslt_map; - foreach my $file ($uris_dbm, $rdf_dbm, $xslt_dbm) { # remove old db file - if (stat $file) { # remove if exists - unlink ($file) or die "can't unlink old db file: $file\n"; - } - } - tie(%urls_of_uris, 'DB_File', $uris_dbm, O_RDWR|O_CREAT, 0664); - tie(%rdf, 'DB_File', $rdf_dbm, O_RDWR|O_CREAT, 0664); - tie(%xslt, 'DB_File', $xslt_dbm, O_RDWR|O_CREAT, 0664); - - open (SRVS, "< $servers_file") or - die "cannot open servers file: $servers_file\n"; - @servers = ; # read all servers - close (SRVS); - - while ($server = pop @servers) { # cicle on servers in _reverse_ order - print "processing server: $server ...\n"; - chomp $server; - helm_wget($tmp_dir, $server."/".$indexname); # get index - helm_wget($tmp_dir, $server."/".$rdf_indexname); # get rdf index - helm_wget($tmp_dir, $server."/".$xslt_indexname); # get xslt index - $idxfile = $tmp_dir."/".$indexname; - $rdf_idxfile = $tmp_dir."/".$rdf_indexname; - $xslt_idxfile = $tmp_dir . "/" . $xslt_indexname; - - # (1) REBUILD URLS_OF_URIS DB - open (INDEX, "< $idxfile") or - die "cannot open temporary index file: $idxfile\n"; - while (my $line = ) { # parse index and add entry to urls_of_uris db - chomp $line; - ($uri,$comp) = split /[ \t]+/, $line; - # build url: - if ($comp =~ /gz/) { - $url = $uri . ".xml" . ".gz"; - } else { - $url = $uri . ".xml"; - } - $url =~ s/cic:/$server/; - $url =~ s/theory:/$server/; - $urls_of_uris{$uri} = $url; - } - - # (2) REBUILD RDF DB - open (RDF_INDEX, "< $rdf_idxfile") or - die "cannot open temporary RDF index file: $rdf_idxfile\n"; - while (my $line = ) { # parse index and add entry to rdf db - chomp $line; - ($uri,$comp) = split /[ \t]+/, $line; # comp is "gz" or nothing - # build url: - if ($comp =~ /gz/) { - $url = $uri . ".xml" . ".gz"; - } else { - $url = $uri . ".xml"; - } - $url =~ s/^helm:rdf(.*)\/\/cic:/$server/; - $url =~ s/^helm:rdf(.*)\/\/theory:/$server/; - $rdf{$uri} = $url; - } - - # (3) REBUILD XSLT DB - open (XSLT_INDEX, "< $xslt_idxfile") or - die "cannot open temporary XSLT index file: $xslt_idxfile\n"; - while (my $line = ) { # parse index and add entry to xslt db - chomp $line; - my $stylesheet = $line; - my $url = $server . "/" . $stylesheet; - $xslt{$stylesheet} = $url; - } - - close INDEX; # close indexes - close RDF_INDEX; - close XSLT_INDEX; - - # remove temp files - foreach my $file ($idxfile, $rdf_idxfile, $xslt_idxfile) { - print "cannot unlink temporary file: $file\n" if (unlink $file) != 1; - } - - } - - untie(%urls_of_uris); # untie local proxies - untie(%rdf); - untie(%xslt); - tie(%xml_map, 'DB_File', $uris_dbm, O_RDWR, 0664); # retie global ones - tie(%rdf_map, 'DB_File', $rdf_dbm, O_RDWR, 0664); - tie(%xslt_map, 'DB_File', $xslt_dbm, O_RDWR, 0664); - -} # update_dbs - -# vim modline: do not remove! -# vim: set ft=perl: -