--- /dev/null
+#!/usr/bin/perl
+
+# 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;
+
+use HTTP::Daemon;
+use HTTP::Status;
+use HTTP::Request;
+use LWP::UserAgent;
+use DB_File;
+use Compress::Zlib;
+use URI::Escape;
+
+foreach $i (@ARGV) {
+ my $filename = $i;
+ $filename =~ s/\//./g;
+ open(FD,">output/$filename");
+
+# my $url = "http://phd.cs.unibo.it:8080/helm/servlet/uwobo/apply?keys=pfi%2Creorder&xmluri=http%3A//phd.cs.unibo.it%3A8081/ls%3Fformat%3Dxml%26baseuri%3D$i¶m.uri=$i¶m.getterURL=http://phd.cs.unibo.it:8081/";
+
+my $url = "http://dotto.cs.unibo.it:8080/helm/servlet/uwobo/apply?keys=pfi%2Creorder&xmluri=http%3A//dotto.cs.unibo.it%3A8081/ls%3Fformat%3Dxml%26baseuri%3D$i¶m.uri=$i¶m.getterURL=http://dotto.cs.unibo.it:8081/";
+
+
+ print "Now processing $i...\n";
+ print "$url\n";
+
+ my $time = time();
+ my $ua = LWP::UserAgent->new;
+ my $request = HTTP::Request->new(GET => "$url");
+ my $response = $ua->request($request, \&callback2);
+ $time = time() - $time;
+ print "Finished. Time elapsed: $time\n\n";
+
+ close(FD);
+}
+
+exit;
+
+sub callback2
+{
+ my ($data) = @_;
+ print FD $data;
+}
+
+#################
+
+
+#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;
+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(%map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664);
+print "Please contact me at: <URL:", $myownurl."/", ">\n";
+print "helm_dir: $helm_dir\n";
+print "style_dir: $style_dir\n";
+print "dtd_dir: $dtd_dir\n";
+print "urls_of_uris.db: $uris_dbm.db\n";
+print "cache mode: $cachemode\n";
+
+$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: ".$http_query."\n";
+
+ if ($http_method eq 'GET' and $http_path eq "/getxml") {
+ # finds the uri, url and filename
+ my $cicuri = $inputuri;
+ 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 $cicfilename = $cicuri;
+ $cicfilename =~ s/cic:(.*)/$1/;
+ $cicfilename =~ s/theory:(.*)/$1/;
+
+ my $cicurl = $map{$cicuri};
+ if (not defined($cicurl)) {
+ die "uri \"$cicuri\" can't be resolved\n";
+ }
+ 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.$extension;
+
+ if (!defined($cicurl)) {
+ print "\nNOT FOUND!!!!!\n";
+ $c->send_error(RC_NOT_FOUND)
+ } else {
+ print_request("cic",$cicuri,$cicurl,$cicfilename);
+
+ # Retrieves the file
+ my $ciccontent = download($patch_dtd,"cic",$cicurl,$cicfilename,$answerformat);
+
+ # Answering the client
+ if ($answerformat eq "normal") {
+ answer($c,$ciccontent,"text/xml","");
+ } else {
+ answer($c,$ciccontent,"text/xml","x-gzip");
+ }
+ }
+ } elsif ($http_method eq 'GET' and $http_path eq "/register") {
+ my $inputurl = $cgi->param('url');
+ print "Register requested...\n";
+ $map{$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.$cicfilename.".xml.gz");
+
+ kill(USR1,getppid()); # signal changes to parent
+ untie %map;
+ print "done\n";
+ html_nice_answer($c,"Register done");
+ } elsif ($http_method eq 'GET' and $http_path eq "/resolve") {
+ my $outputurl = $map{$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") {
+ 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(<FD>) {
+ # 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 "/getstyleconf") {
+ my $filename = $inputuri;
+ $filename = $style_dir."/config/".$filename;
+ if (stat($filename)) {
+ open(FD, $filename) or die "Cannot open $filename\n";
+ $cont = "";
+ while(<FD>) {
+ s/DOCTYPE (.*) SYSTEM\s+"/DOCTYPE $1 SYSTEM "$myownurl\/getstyleconf?uri=/g;
+ $cont .= $_;
+ }
+ close(FD);
+ answer($c,$cont,"text/plain","");
+ } else {
+ die "Could not find Style Configuration File!";
+ }
+ } elsif ($http_method eq 'GET' and $http_path eq "/getxslt") {
+ 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,$cont,"text/xml","");
+ } else {
+ die "Could not find XSLT!";
+ }
+ } elsif ($http_method eq 'GET' and $http_path eq "/update") {
+ # rebuild urls_of_uris.db
+ print "Update requested...\n";
+ mk_urls_of_uris();
+ kill(USR1,getppid()); # signal changes to parent
+ print " done\n";
+ html_nice_answer($c,"Update done");
+ } 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 "/"
+ my $outype = $cgi->param('format'); # output type, might be 'txt' or 'xml'
+ $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 $http_path eq "/help") {
+ print "Help requested!\n";
+ html_nice_answer($c,"HTTP Getter Version: $VERSION");
+ } elsif ($http_method eq 'GET' and $http_path =~ /\.cgi$/) {
+ 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 {
+ 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 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(%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,$typeflag>";
+}
+
+#CSC: Too much powerful: creates even /home, /home/users/, ...
+#CSC: Does not raise errors if could not create dirs/files
+sub mkdirs
+{
+ my ($pathname) = @_;
+ my @dirs = split /\//,$pathname;
+ my $tmp;
+ foreach $dir (@dirs) {
+ $tmp = ((defined($tmp)) ? $tmp."\/".$dir : "");
+ mkdir($tmp,0777);
+ }
+ rmdir($tmp);
+}
+
+sub print_request
+{
+ my ($str,$uri,$url,$filename) = @_;
+ print $str."uri: $uri\n";
+ print $str."url: $url\n";
+ print $str."filename: $filename\n\n";
+}
+
+sub callback
+{
+ my ($data) = @_;
+ $cont .= $data;
+}
+
+sub gunzip { # gunzip a file and return the deflated content
+ my ($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,$str,$url,$filename,$format) = @_;
+ my ($gz, $buffer);
+
+ #my $debug=1; # for DEBUG only
+
+ 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 for the $str file\n";
+ if ($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 the $str 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 the $str file\n";
+ print "Making dirs ...\n" if (defined($debug));
+ mkdirs($filename);
+ print "Opening tmp file for writing ...\n" if (defined($debug));
+ open(FD, ">".$filename.".tmp") or die "Cannot open $filename.tmp\n";
+ print "Writing on tmp file ...\n" if (defined($debug));
+ print FD $cont;
+ print "Closing tmp file ...\n" if (defined($debug));
+ 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 ($format eq "gz") {
+ gzip($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";
+ }
+
+ 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);
+}
+
+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 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 {
+ untie %map;
+ tie(%map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664);
+}
+
+sub mk_urls_of_uris {
+#rebuild $uris_dbm.db fetching resource indexes from servers
+ my (
+ $server, $idxfile, $uri, $url, $comp, $line,
+ @servers,
+ %urls_of_uris
+ );
+
+ untie %map;
+ if (stat $uris_dbm.".db") { # remove old db file
+ unlink($uris_dbm.".db") or
+ die "cannot unlink old db file: $uris_dbm.db\n";
+ }
+ tie(%urls_of_uris, 'DB_File', $uris_dbm.".db", O_RDWR|O_CREAT, 0664);
+
+ open (SRVS, "< $servers_file") or
+ die "cannot open servers file: $servers_file\n";
+ @servers = <SRVS>;
+ close (SRVS);
+ while ($server = pop @servers) { #cicle on servers in reverse order
+ print "processing server: $server ...\n";
+ chomp $server;
+ helm_wget($tmp_dir, $server."/".$indexname); #get index
+ $idxfile = $tmp_dir."/".$indexname;
+ open (INDEX, "< $idxfile") or
+ die "cannot open temporary index file: $idxfile\n";
+ while ($line = <INDEX>) { #parse index and add entry to urls_of_uris
+ 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;
+ }
+ close INDEX;
+ die "cannot unlink temporary file: $idxfile\n"
+ if (unlink $idxfile) != 1;
+ }
+
+ untie(%urls_of_uris);
+ tie(%map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664);
+}
+
projects / helm.git / commitdiff