+
+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;
+ $debugserver = "http://dalamar.krynn.it/helm"; # FOR DEBUG ONLY: REMOVE ME !!
+ helm_wget($tmpdir, $debugserver."/".$indexname); #get index
+ $idxfile = $tmpdir."/".$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_RDONLY, 0664);
+}
+