# various variables
my ($HELM_LIB_PATH);
-my (%map);
+my $cgi_dir = "@HELM_CGI_DIR@";
+my (%map, %rdf_map);
# First of all, let's load HELM configuration
use Env;
}
# </ZACK>
-# next require defines: $helm_dir, $html_link, $dtd_dir, $uris_dbm
+# next require defines: $helm_dir, $html_link, $dtd_dir, $uris_dbm, $indexname
require $HELM_LIB_PATH;
+# TEMP: TODO put these vars in configuration file configuration.xml
+# <move_to_conf_file>
+$helm_rdf_dir = "/projects/helm/shared/V7/rdf_library";
+$rdf_dbm = "/projects/helm/shared/V7/rdf_urls_of_uris";
+$rdf_indexname = "rdf_index.txt";
+# </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"}));
($myownurl) = gethostbyname($myownurl);
$myownurl = "http://".$myownurl.":".$myownport;
-tie(%map, 'DB_File', $uris_dbm.".db", O_RDONLY, 0664);
+tie(%map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664); # open dbs
+tie(%rdf_map, 'DB_File', $rdf_dbm.".db", O_RDWR, 0664);
+
+print "\n";
+print "HTTP Getter $VERSION\n"; # print hello information
print "Please contact me at: <URL:", $myownurl."/", ">\n";
+print "\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.db\n";
print "cache mode: $cachemode\n";
+print "indexname: $indexname\n";
+print "rdf_indexname: $rdf_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 $r = $c->get_request) {
#CSC: mancano i controlli di sicurezza
- my $inputuri = uri_unescape($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: ".$http_query."\n";
- if ($http_method eq 'GET' and $http_path eq "/getciconly") {
+ # "getxml" works with rdf uris
+ if ($http_method eq 'GET' and $http_path eq "/getxml") {
# finds the uri, url and filename
- my $cicuri = $inputuri;
- my $cicfilename = $cicuri;
- $cicfilename =~ s/cic:(.*)/$1/;
- $cicfilename =~ s/theory:(.*)/$1/;
+ 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 = $inputuri;
+ if (not isRdfUri($inputuri)) { # standad cic: or theory: uri
+ $filename =~ s/^cic:(.*)/$1/;
+ $filename =~ s/^theory:(.*)/$1/;
+ } else { # rdf uri
+ $filename =~ s/^(.*)\/\/cic:(.*)/$2/;
+ $filename =~ s/^(.*)\/\/theory:(.*)/$2/;
+ }
- my $cicurl = $map{$cicuri};
- my $extension;
- if ($cicurl =~ /\.xml$/) { # non gzipped file
+ my $url = resolve ($inputuri); # resolve uri in url
+ if (not defined($url)) {
+ die "uri \"$inputuri\" can't be resolved\n";
+ }
+
+ my $extension; # file extension
+ if ($url =~ /\.xml$/) { # non gzipped file
$extension = ".xml";
- } elsif ($cicurl =~ /\.xml\.gz$/) { # gzipped file
+ } elsif ($url =~ /\.xml\.gz$/) { # gzipped file
$extension = ".xml.gz";
} else { # error: unknown extension
- die "unexpected extension in url: $cicurl, might be '.xml'".
+ die "unexpected extension in url: $url, 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 $ciccontent = download(0,"cic",$cicurl,$cicfilename);
-
- # Answering the client
- answer($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);
- $annsuffix = ".ann";
+ if (not isRdfUri ($inputuri)) {
+ $filename = $helm_dir.$filename.$extension;
} else {
- undef($typesuri);
- undef($annuri);
+ $filename = $helm_rdf_dir.$filename.$extension;
}
- my $cicfilename = $cicuri;
- $cicfilename =~ s/cic:(.*)/$1/;
- $cicfilename =~ s/theory:(.*)/$1/;
- $cicfilename = $helm_dir.$cicfilename;
-
- 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 .= $cicext;
-
- if (!defined($cicurl) ||
- (!defined($typesurl) && $typesuri) ||
- (!defined($annuri) && $annuri))
- {
+ if (!defined($url)) {
print "\nNOT FOUND!!!!!\n";
$c->send_error(RC_NOT_FOUND)
} else {
- print_request("cic",$cicuri,$cicurl,$cicfilename);
- print_request("types",$typesuri,$typesurl,$typesfilename)
- if ($typesuri);
- print_request("ann",$annuri,$annurl,$annfilename)
- if ($annuri);
-
- # Retrieves the files
+ print_request("cic",$inputuri,$url,$filename);
- 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
+ # Retrieves the file
+ my $ciccontent = download($patch_dtd,"cic",$url,$filename,$answerformat);
# Answering the client
- answer($c,$merged);
+ if ($answerformat eq "normal") {
+ answer($c,$ciccontent,"text/xml","");
+ } else {
+ answer($c,$ciccontent,"text/xml","x-gzip");
+ }
}
- } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") {
+ # "/register" does not work with rdf uris
+ } elsif ($http_method eq 'GET' and $http_path eq "/register") {
+ my $inputurl = $cgi->param('url');
+ print "Register requested...\n";
+ $map{$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");
+ # "/resolve" works with rdf uri
+ } elsif ($http_method eq 'GET' and $http_path eq "/resolve") {
+ #my $outputurl = $map{$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") {
my $filename = $inputuri;
$filename = $dtd_dir."/".$filename;
print "DTD: $inputuri ==> ($filename)\n";
$cont .= $_;
}
close(FD);
- answer($c,$cont);
+ answer($c,$cont,"text/xml","");
} else {
die "Could not find DTD!";
}
$cont .= $_;
}
close(FD);
- answer($c,$cont);
+ answer($c,$cont,"text/plain","");
} else {
die "Could not find Style Configuration File!";
}
$cont .= $_;
}
close(FD);
- answer($c,$cont);
+ answer($c,$cont,"text/xml","");
} else {
die "Could not find XSLT!";
}
- } elsif ($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 $http_path eq "/update") {
- # rebuild urls_of_uris.db
+ # rebuild urls_of_uris db and rdf uris db
print "Update requested...\n";
- mk_urls_of_uris();
+ update_dbs();
kill(USR1,getppid()); # signal changes to parent
print " done\n";
- answer($c,"<html><body><h1>Update done</h1></body></html>");
+ 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);
if ($uritype ne "invalid") { # uri is valid
if (($outype ne 'txt') and ($outype ne 'xml')) { # invalid out type
print "Invalid output type specified: $outype\n";
- answer($c,"<html><body><h1>Invalid output type, may be ".
- "\"txt\" or \"xml\"</h1></body></html>");
+ 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);
- answer($c,$cont);
+ 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: $baseuri, may begin with 'cic:', ".
"'theory:' or '*:'\n";
- answer($c,"<html><body><h1>Invalid uri , may begin with ".
- "\"cic:\", \"theory:\" or \"*:\"</h1></body></html>");
+ html_nice_answer($c,"Invalid uri , must begin with ".
+ "'cic:' or 'theory:'");
}
} elsif ($http_method eq 'GET' and $http_path eq "/help") {
- print "Help requested!";
- answer($c,"<html><body><h1>HTTP Getter Version ".
- $VERSION."</h1></body></html>");
- } else {
+ # help request
+ print "Help requested!\n";
+ html_nice_answer($c,"HTTP Getter Version: $VERSION");
+ } elsif ($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: ",$http_path,", ";
#================================
+sub isRdfUri { # return true if the uri is an rdf uri, false otherwise
+# typycal rdf uri:
+# helm:rdf/cic:www.cs.unibo.it/helm/rdf/foo_schema//cic:\
+# /Coq/Init/Logic/True_rec.con.types
+#
+# the format is "helm:rdf/<metadata_tree>:<metadata_scheme>//<xml_file_uri>"
+#
+ my ($uri) = @_;
+ if ($uri =~ /^helm:rdf(.*):(.*)\/\/(.*)/) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+sub resolve { # resolve an uri in a url, work both with standard cic: or theory:
+ # uris and rdf uris
+ my ($uri) = @_;
+ if (isRdfUri ($uri)) { # rdf uri, resolve using rdf db
+ return ($rdf_map{$uri});
+ } else { # standard cic: or theory: uri, resolve using std uri db
+ return ($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";
+ "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\//) {
- $localpart = $uri;
- $localpart =~ s/^$uritype:$uripattern\/(.*)/$1/;
+ if ($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
+ $basepart =~ s/^([^.]*\.[^.]*)(\.types)?(\.ann)?/$1/;
+ # remove exts .types or
# .types.ann
$flags = $objects{$basepart}; # get old flags
if ($localpart =~ /\.ann$/) {
}
} elsif ($format eq "xml") { # XML output
$content .= '<?xml version="1.0" encoding="ISO-8859-1"?>' . "\n";
- $content .= '<!DOCTYPE ls SYSTEM ';
- $content .= '"http://localhost:8081/getdtd?uri=ls.dtd">' . "\n\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";
$gz->gzclose();
}
-sub download
-{
- my ($remove_headers,$str,$url,$filename) = @_;
+sub download {
+ my ($patch_dtd,$str,$url,$filename,$format) = @_;
my ($gz, $buffer);
#my $debug=1; # for DEBUG only
."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
+ 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";
+ }
+ # $cont now contained uncompressed data
}
- if ($remove_headers) {
- $cont =~ s/<\?xml [^?]*\?>//sg;
- $cont =~ s/<!DOCTYPE [^>]*>//sg;
- } else {
+ if ($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 $cont;
}
-sub answer
-{
- my ($c,$cont) = @_;
+sub answer {
+# answer the client setting content, Content-Type and Content-Enconding
+# of the answer
+ my ($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
sub update {
untie %map;
- tie(%map, 'DB_File', $uris_dbm.".db", O_RDONLY, 0664);
+ tie(%map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664);
+ untie %rdf_map;
+ tie(%rdf_map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664);
}
-sub mk_urls_of_uris {
-#rebuild $uris_dbm.db fetching resource indexes from servers
+sub update_dbs {
+# rebuild dbs fetching resource indexes from servers.
+# Rebuild urls_of_uris db (1) and rdf db (2)
my (
- $server, $idxfile, $uri, $url, $comp, $line,
+ $server, $idxfile, $rdf_idxfile, $uri, $url, $comp, $line,
@servers,
- %urls_of_uris
+ %urls_of_uris, %rdf # local proxy of $map and $rdf_map
);
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";
+ untie %rdf_map;
+ foreach my $file ($uris_dbm, $rdf_dbm) { # remove old db file
+ if (stat $file.".db") { # remove if exists
+ unlink ($file.".db") or die "can't unlink old db file: $file.db\n";
+ }
}
tie(%urls_of_uris, 'DB_File', $uris_dbm.".db", O_RDWR|O_CREAT, 0664);
+ tie(%rdf, 'DB_File', $rdf_dbm.".db", O_RDWR|O_CREAT, 0664);
open (SRVS, "< $servers_file") or
die "cannot open servers file: $servers_file\n";
- @servers = <SRVS>;
+ @servers = <SRVS>; # read all servers
close (SRVS);
- while ($server = pop @servers) { #cicle on servers in reverse order
+
+ 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, $server."/".$indexname); # get index
+ helm_wget($tmp_dir, $server."/".$rdf_indexname); # get rdf index
$idxfile = $tmp_dir."/".$indexname;
- open (INDEX, "< $idxfile") or
+ $rdf_idxfile = $tmp_dir."/".$rdf_indexname;
+
+ open (INDEX, "< $idxfile") or # (1) REBUILD URLS_OF_URIS DB
die "cannot open temporary index file: $idxfile\n";
- while ($line = <INDEX>) { #parse index and add entry to urls_of_uris
+ while ($line = <INDEX>) { # parse index and add entry to urls_of_uris db
chomp $line;
($uri,$comp) = split /[ \t]+/, $line;
# build url:
$url =~ s/theory:/$server/;
$urls_of_uris{$uri} = $url;
}
- close INDEX;
- die "cannot unlink temporary file: $idxfile\n"
+
+ open (RDF_INDEX, "< $rdf_idxfile") or # (2) REBUILD RDF DB
+ die "cannot open temporary rdf index file: $rdf_idxfile\n";
+ while ($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;
+ }
+
+ close INDEX; # close indexes
+ close RDF_INDEX;
+ die "cannot unlink temporary file: $idxfile\n" # remove temp files
if (unlink $idxfile) != 1;
+ die "cannot unlink temporary file: $rdf_idxfile\n"
+ if (unlink $rdf_idxfile) != 1;
+
}
- untie(%urls_of_uris);
- tie(%map, 'DB_File', $uris_dbm.".db", O_RDONLY, 0664);
-}
+ untie(%urls_of_uris); # untie local proxies
+ untie(%rdf);
+ tie(%map, 'DB_File', $uris_dbm.".db", O_RDWR, 0664); # retie global ones
+ tie(%rdf_map, 'DB_File', $rdf_dbm.".db", O_RDWR, 0664);
+} # update_dbs
projects / helm.git / blobdiff