# 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"};
$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
-# <move_to_conf_file>
-my $cachemode = $ENV{'HTTP_GETTER_CACHE_MODE'} ||
- 'gzipped';
+# <ZACK>: TODO temporary, move this setting to configuration file
+# set the cache mode, may be "gzipped" or "normal"
+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";
+ die "Invalid HTTP_GETTER_CACHE_MODE environment variable, must be 'normal' or 'gzipped'\n";
}
+# </ZACK>
-my $helm_rdf_dir = $ENV{'HTTP_GETTER_RDF_DIR'} ||
- "/usr/local/helm/rdf_library";
-my $rdf_dbm = $ENV{'HTTP_GETTER_RDF_DBM'} ||
- "/usr/local/helm/rdf_urls_of_uris.db";
-my $xslt_dbm = $ENV{'HTTP_GETTER_XSLT_DBM'} ||
- "/usr/local/helm/xslt_urls_of_uris.db";
-my $rdf_indexname = $ENV{'HTTP_GETTER_RDF_INDEXNAME'} ||
- "rdf_index.txt";
-my $xslt_indexname = $ENV{'HTTP_GETTER_XSLT_INDEXNAME'} ||
- "xslt_index.txt";
-$servers_file = $ENV{'HTTP_GETTER_SERVERS_FILE'} || $servers_file;
-
-# </move_to_conf_file>
-
-# Let's override the configuration file
-$style_dir = $ENV{"HELM_STYLE_DIR"} if (defined ($ENV{"HELM_STYLE_DIR"}));
-$dtd_dir = $ENV{"HELM_DTD_DIR"} if (defined ($ENV{"HELM_DTD_DIR"}));
+# next require defines: $helm_dir, $html_link, $dtd_dir, $uris_dbm
+require $HELM_LIB_PATH;
use HTTP::Daemon;
use HTTP::Status;
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 => 8081
- or die "Error: port 8081 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: <URL:", $myownurl."/", ">\n";
-print "\n";
-print "servers_file: $servers_file\n";
+my $d = new HTTP::Daemon LocalPort => 8081;
+tie(%map, 'DB_File', $uris_dbm.".db", O_RDONLY, 0664);
+print "Please contact me at: <URL:", $d->url, ">\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 "urls_of_uris.db: $uris_dbm.db\n";
print "cache mode: $cachemode\n";
-print "indexname: $indexname\n";
-print "rdf_indexname: $rdf_indexname\n";
-print "xslt_indexname: $xslt_indexname\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 $inputuri = $r->url;
+ $inputuri =~ s/^[^?]*\?uri=(.*)/$1/;
+ print "\nRequest: ".$r->url."\n\n";
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 $http_path eq "/getxml") {
+ if ($http_method eq 'GET' and $http_path eq "/getciconly") {
# finds the uri, url and filename
+ my $cicuri = $inputuri;
+
+ my $cicfilename = $cicuri;
+ $cicfilename =~ s/cic:(.*)/$1/;
+ $cicfilename =~ s/theory:(.*)/$1/;
+# $cicfilename = $helm_dir.$cicfilename.".xml";
+# <gzip>
+ my $cicurl = $map{$cicuri};
+ my $extension;
+ if ($cicurl =~ /\.xml$/) { # non gzipped file
+ $extension = ".xml";
+ } elsif ($cicurl =~ /\.xml\.gz$/) { # gzipped file
+ $extension = ".xml.gz";
+ } else { # error: unknown extension
+ die "unexpected extension in url: $cicurl, might be '.xml' or '.xml.gz'";
+ }
+ $cicfilename = $helm_dir.$cicfilename.$extension;
+
+ #my $cicurl = $map{$cicuri};
+# </gzip>
+ if (!defined($cicurl)) {
+ print "\nNOT FOUND!!!!!\n";
+ $c->send_error(RC_NOT_FOUND)
+ } else {
+ print_request("cic",$cicuri,$cicurl,$cicfilename);
- 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";
- }
+ # Retrieves the file
+ my $ciccontent = download(0,"cic",$cicurl,$cicfilename);
- 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;
+ # Answering the client
+ answer($c,$ciccontent);
+ }
+ } elsif ($http_method eq 'GET' and $http_path eq "/get") {
+ # finds the uris, urls and filenames
+ my $cicuri = $inputuri,
+ $typesuri = $inputuri,
+ $annuri = $inputuri;
+ my $annsuffix;
+ if ($inputuri =~ /\.types$/) {
+ $cicuri =~ s/(.*)\.types$/$1/;
+ undef($annuri);
+ } elsif ($inputuri =~ /\.types\.ann$/) {
+ $cicuri =~ s/(.*)\.types\.ann$/$1/;
+ $typesuri =~ s/(.*)\.ann$/$1/;
+ $annsuffix = ".types.ann";
+ } elsif ($inputuri =~ /\.ann$/) {
+ $cicuri =~ s/(.*)\.ann$/$1/;
+ undef($typesuri);
+ $annsuffix = ".ann";
+ } else {
+ undef($typesuri);
+ undef($annuri);
}
- 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";
+ my $cicfilename = $cicuri;
+ $cicfilename =~ s/cic:(.*)/$1/;
+ $cicfilename =~ s/theory:(.*)/$1/;
+ $cicfilename = $helm_dir.$cicfilename;
+
+# my $typesfilename = $cicfilename.".types.xml" if $typesuri;
+# my $annfilename = $cicfilename.$annsuffix.".xml" if $annuri;
+# $cicfilename .= ".xml";
+
+# <gzip>
+ my $cicurl = $map{$cicuri};
+ my $typesurl = $map{$typesuri} if (defined($typesuri));
+ my $annurl = $map{$annuri} if (defined($annuri));
+ my ($cicext, $typesext, $annext);
+ if ($cicurl =~ /\.xml$/) { # normal file
+ $cicext = ".xml";
+ } elsif ($cicurl =~ /\.xml\.gz$/) { # gzipped file
+ $cicext = ".xml.gz";
+ } else {
+ die "unexpected extension in url: $cicurl; might be '.xml' or '.xml.gz'";
+ }
+ if (defined($typesuri)) { # extension selection for types file
+ if ($typesurl =~ /\.xml$/) { # normal file
+ $typesext = ".types.xml";
+ } elsif ($typesurl =~ /\.xml\.gz$/) { # gzipped file
+ $typesext = ".types.xml.gz";
+ } else {
+ die "unexpected extension in url: $typesurl; might be '.xml' or '.xml.gz'";
+ }
+ }
+ if (defined($annuri)) { # extension selection for annotation file
+ if ($annurl =~ /\.xml$/) { # normal file
+ $annext = ".xml";
+ } elsif ($annurl =~ /\.xml\.gz$/) { # gzipped file
+ $annext = ".xml.gz";
+ } else {
+ die "unexpected extension in url: $annurl might be '.xml' or '.xml.gz'";
+ }
+ }
+ my $typesfilename = $cicfilename.$typesext if $typesuri;
+ my $annfilename = $cicfilename.$annsuffix.$annext if $annuri;
+ $cicfilename .= $cicext;
+# </gzip>
+
+
+ if (!defined($cicurl) ||
+ (!defined($typesurl) && $typesuri) ||
+ (!defined($annuri) && $annuri))
+ {
+ print "\nNOT FOUND!!!!!\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));
- $cont = "<?xml version=\"1.0\" ?>\n\n";
- if ($outputurl eq "") {
- $cont .= "<unresolved />\n";
- } else {
- $cont .= "<url value=\"$outputurl\" />\n";
- }
- answer($c,$cont,"text/xml","");
-
- } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") {
+ } else {
+ print_request("cic",$cicuri,$cicurl,$cicfilename);
+ print_request("types",$typesuri,$typesurl,$typesfilename)
+ if ($typesuri);
+ print_request("ann",$annuri,$annurl,$annfilename)
+ if ($annuri);
+
+ # Retrieves the files
+ my $ciccontent = download(1,"cic",$cicurl,$cicfilename);
+ my $typescontent =
+ download(1,"types",$typesurl,$typesfilename) if ($typesuri);
+ my $anncontent =
+ download(1,"ann",$annurl,$annfilename) if ($annuri);
+
+ # Merging the files together
+
+ my $merged = <<EOT;
+<?xml version="1.0" encoding="UTF-8"?>
+<cicxml uri="$cicuri">
+$ciccontent
+$typescontent
+$anncontent
+</cicxml>
+EOT
+
+ # Answering the client
+ answer($c,$merged);
+ }
+ } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") {
my $filename = $inputuri;
$filename = $dtd_dir."/".$filename;
print "DTD: $inputuri ==> ($filename)\n";
print "Using local copy\n";
open(FD, $filename) or die "Cannot open $filename\n";
$cont = "";
- while(<FD>) {
- # Vary bad heuristic for substituion of absolute URLs
- # for relative ones
- s/ENTITY (.*) SYSTEM\s+"/ENTITY $1 SYSTEM "$myownurl\/getdtd?uri=/g;
- $cont .= $_;
- }
+ while(<FD>) { $cont .= $_; }
close(FD);
- answer($c,$cont,"text/xml","");
+ answer($c,$cont);
} else {
die "Could not find DTD!";
}
-
- } elsif ($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(<FD>) {
- 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'";
-
-# <old_version>
-# 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";
-# $cont = "";
-# while(<FD>) {
-# # Vary bad heuristic for substituion of absolute URLs
-# # for relative ones
-# s/xsl:import\s+href="/xsl:import href="$myownurl\/getxslt?uri=/g ;
-# s/xsl:include\s+href="/xsl:include href="$myownurl\/getxslt?uri=/g ;
-# $cont .= $_;
-# }
-# close(FD);
-# answer($c,$cont,"text/xml","");
-# } else {
-# die "Could not find XSLT!";
-# }
-# </old_version>
-
- # "/update" works with rdf uri
+ } elsif ($http_method eq 'GET' and $http_path eq "/conf") {
+ my $quoted_html_link = $html_link;
+ $quoted_html_link =~ s/&/&/g;
+ $quoted_html_link =~ s/</</g;
+ $quoted_html_link =~ s/>/>/g;
+ $quoted_html_link =~ s/'/'/g;
+ $quoted_html_link =~ s/"/"/g;
+ print "\nConfiguration requested, returned #$quoted_html_link#\n";
+ $cont = "<?xml version=\"1.0\"?><html_link>$quoted_html_link</html_link>";
+ answer($c,$cont);
} elsif ($http_method eq 'GET' and $http_path eq "/update") {
- # rebuild urls_of_uris db and rdf uris db
- print "Update requested...\n";
- update_dbs();
- kill(USR1,getppid()); # signal changes to parent
+ print "Update requested...";
+ update();
+ kill(USR1,getppid());
print " done\n";
- html_nice_answer($c,"Update done");
-
- # "/ls" does not work with rdf uris
- } 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 $emptyxml = <<EOXML;
-<?xml version="1.0"?>
-<!DOCTYPE empty [
- <!ELEMENT empty EMPTY>
-]>
-<empty />
-EOXML
- answer($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";
+ answer($c,"<html><body><h1>Update done</h1></body></html>");
+ } else {
+ print "\nINVALID REQUEST!!!!!\n";
$c->send_error(RC_FORBIDDEN)
}
-
print "\nRequest solved: ".$r->url."\n\n";
}
-
$c->close;
undef($c);
print "\nCONNECTION CLOSED\n\n";
#================================
-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/<metadata_tree>:<metadata_scheme>//<xml_file_uri>"
-#
- 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{$uri});
- }
-}
-
-sub finduris { # find uris for cic and theory trees generation
- my ($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/^([^.]*\.[^.]*)(\.types)?(\.ann)?/$1/;
- # remove exts .types or
- # .types.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);
- }
- $objects{$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 .= '<?xml version="1.0" encoding="ISO-8859-1"?>' . "\n";
- $content .= "<!DOCTYPE ls SYSTEM ";
- $content .= "\"$myownurl/getdtd?uri=ls.dtd\">" . "\n\n";
- $content .= "<ls>\n";
- foreach $key (sort(keys %dirs)) {
- $content .= "\t<section>$key</section>\n";
- }
- foreach $key (sort(keys %objects)) {
- $content .= "\t<object name=\"$key\">\n";
- $flags = $objects{$key};
- $flags =~ s/^<(.*)>$/$1/;
- my ($annflag,$typesflag) = split /,/,$flags;
- $content .= "\t\t<ann value=\"$annflag\" />\n";
- $content .= "\t\t<types value=\"$typesflag\" />\n";
- $content .= "\t</object>\n";
- }
- $content .= "</ls>\n";
- } else { # may not enter this branch
- die "Getter internal error: invalid format received by finduris sub";
- }
- return $content;
-}
-
-sub add_flag {
-# manage string like: "<ann_flag,type_flag>"
-# "ann_flag" may be one of "ann_YES", "ann_NO"
-# "type_flag" may be one of "types_NO", "types_YES", "types_ANN"
-# when adding a flag the max between the current flag and the new flag
-# is taken, the orders are ann_NO < ann_YES and types_NO < types_YES <
-# types_ANN
- my ($flagtype,$newflag,$str) = @_;
- $str = "<,>" if ($str eq "");
- ($str =~ s/^<(.*,.*)>$/$1/) or die "Internal error: ".
- "wrong string format for flag adding in $str";
- my ($annflag,$typeflag) = split /,/,$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 ($typeflag eq "YES"));
- } else {
- die "Internal error: typeflag must be \"YES\", \"NO\" or \"ANN\"";
- }
- } else {
- die "Internal error: unsupported flagtype \"$flagtype\"";
- }
- $str = "<$annflag,$typeflag>";
-}
#CSC: Too much powerful: creates even /home, /home/users/, ...
#CSC: Does not raise errors if could not create dirs/files
sub print_request
{
- my ($uri,$url,$filename) = @_;
- print "<download_request>\n";
- print "uri: $uri\n";
- print "url: $url\n";
- print "filename: $filename\n\n";
- print "</download_request>\n";
+ my ($str,$uri,$url,$filename) = @_;
+ print $str."uri: $uri\n";
+ print $str."url: $url\n";
+ print $str."filename: $filename\n\n";
+}
+
+sub callback
+{
+ my ($data) = @_;
+ $cont .= $data;
}
sub gunzip { # gunzip a file and return the deflated content
my ($gz, $buffer, $cont);
print "deflating $filename ...\n";
- $gz = gzopen($filename, "r")
- or die "Cannot open gzip'ed file $filename: $gzerrno";
+ $gz = gzopen($filename, "r") or die "Cannot open gzip'ed file $filename: $gzerrno";
$cont = "";
while ( $gz->gzread($buffer) > 0 ) {
$cont .= $buffer;
sub gzip { # gzip the content argument and save it to filename argument
my ($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));
+
+ my ($gz, $cont);
+
+ $gz = gzopen($filename, "w") or die "Cannot gzopen for writing file $filename: $gzerrno";
+ $gz->gzwrite($cont) or die "error writing: $gzerrno\n" ;
$gz->gzclose();
}
-sub download {
- my ($patch_dtd,$url,$filename,$format) = @_;
+sub download
+{
+ my ($remove_headers,$str,$url,$filename) = @_;
+# <gzip>
my ($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";
die "Unsupported download extension, might be '.gz' or '.xml'\n";
}
my $basefname = $filename;
- $basefname =~ s/\.gz$//; # get base resource name removing trailing .gz
+ $basefname =~ s/\.gz$//; # get base resource name removing trailing .gz
+# </gzip>
$cont = ""; # modified by side-effect by the callback function
my $localfname="";
} elsif (stat($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(<FD>) { $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
- # <ZACK/> 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+"http:\/\/www.cs.unibo.it\/helm\/dtd\//DOCTYPE $1 SYSTEM "$myownurl\/getdtd?uri=/g;
+ if ($localfname ne "") { # we already have local copy of requested file
+ # check both possible cache entry: gzipped or normal
+ print "Using local copy for the $str file\n";
+# <gzip>
+ if ($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(<FD>) { $cont .= $_; }
+ close(FD);
+ } else { # error
+ die "Internal error: unexpected file name $localfname, must end with '.gz' or '.xml.gz'\n";
+ }
+# </gzip>
+ } else { # download file from net
+ print "Downloading the $str file\n"; # download file
+ $ua = LWP::UserAgent->new;
+ $request = HTTP::Request->new(GET => "$url");
+ $response = $ua->request($request, \&callback);
+
+ # cache retrieved file to disk
+# <ZACK/> TODO: inefficent, I haven't yet undestood how to deflate in memory gzipped file,
+# without call "gzopen"
+# <gzip>
+ print "Storing the $str file\n";
+ mkdirs($filename);
+ open(FD, ">".$filename.".tmp") or die "Cannot open $filename.tmp\n";
+ print FD $cont;
+ close(FD);
+
+ # handle cache conversion normal->gzipped or gzipped->normal as user choice
+ if (($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
+ gzip($cont, $basefname.".gz");
+ unlink "$filename.tmp"; # delete old uncompressed file
+ } else {
+ die "Internal error, unsopported cachemode, resourcetype couple\n";
+ }
+ # $cont now contained uncompressed data
+
+# </gzip>
}
- if ($format eq "gz") {
- gzip($cont,"$basefname.tmp");
- open (TMP, "< $basefname.tmp")
- or die "Can't open tempfile: $filename.tmp, exiting!\n";
- $cont = "";
- while(<TMP>) {
- $cont .= $_;
- }
- close TMP;
- unlink ($basefname . ".tmp") or
- die "cannot unlink temporary file: $basefname.tmp\n";
+ if ($remove_headers) {
+ $cont =~ s/<\?xml [^?]*\?>//sg;
+ $cont =~ s/<!DOCTYPE [^>]*>//sg;
}
-
return $cont;
}
-sub answer {
-# answer the client setting content, Content-Type and Content-Enconding
-# of the answer
- my ($c,$cont,$contype,$contenc) = @_;
+sub answer
+{
+ my ($c,$cont) = @_;
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);
}
-sub html_nice_answer {
-# answer the client whith a nice html document
- my ($c,$content) = @_;
- $content = "<html><body><h1>$content</h1></body></html>";
- 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);
+ untie %map;
+ tie(%map, 'DB_File', $uris_dbm.".db", O_RDONLY, 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: $servers_file\n";
- @servers = <SRVS>; # read all servers
- close (SRVS);
-
- while ($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 = <INDEX>) { # 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 = <RDF_INDEX>) { # 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 = <XSLT_INDEX>) { # 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:
-
projects / helm.git / blobdiff