# 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 (%map);
+
# First of all, let's load HELM configuration
use Env;
my $HELM_LIB_DIR = $ENV{"HELM_LIB_DIR"};
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 $http_path eq "/getciconly") {
+ if ($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));
+ $patch_dtd = "" if (not defined($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
$extension = ".xml";
print_request("cic",$cicuri,$cicurl,$cicfilename);
# Retrieves the file
- my $ciccontent = download(0,"cic",$cicurl,$cicfilename);
+ my $ciccontent = download($patch_dtd,"cic",$cicurl,$cicfilename,$answerformat);
# Answering the client
- answer($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 $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))
- {
- 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
-
- 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,$merged);
+ if ($answerformat eq "normal") {
+ answer($c,$ciccontent,"text/xml","");
+ } else {
+ answer($c,$ciccontent,"text/xml","x-gzip");
+ }
}
- } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") {
+ } elsif ($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";
$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 $http_path eq "/update") {
# rebuild urls_of_uris.db
print "Update requested...\n";
mk_urls_of_uris();
kill(USR1,getppid()); # signal changes to parent
print " done\n";
- answer($c,"<html><body><h1>Update done</h1></body></html>");
+ html_nice_answer($c,"Update done");
} elsif ($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 ".
- $VERSION."</h1></body></html>");
+ print "Help requested!\n";
+ html_nice_answer($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";
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";
sub gzip { # gzip the content argument and save it to filename argument
my ($cont, $filename) = @_;
+ #my $debug=1; # debug only
- my ($gz, $cont);
-
- $gz = gzopen($filename, "w")
+ print "gzopening $filename ...\n" if (defined($debug));
+ my $gz = gzopen($filename, "w")
or die "Cannot gzopen for writing file $filename: $gzerrno";
- $gz->gzwrite($cont) or die "error writing: $gzerrno\n" ;
+ print "gzwriting ...\n" if (defined($debug));
+ $gz->gzwrite($cont) or die "error writing: $gzerrno, exiting!\n";
+ print "gzclosing ...\n" if (defined($debug));
$gz->gzclose();
}
-sub download
-{
- my ($remove_headers,$str,$url,$filename) = @_;
+sub download {
+ my ($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";
."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 $str file\n";
- mkdirs($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
+ 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