# 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 (%map);
+
# First of all, let's load HELM configuration
use Env;
my $HELM_LIB_DIR = $ENV{"HELM_LIB_DIR"};
use LWP::UserAgent;
use DB_File;
use Compress::Zlib;
+use CGI;
+use URI::Escape;
#CSC: mancano i controlli sulle condizioni di errore di molte funzioni
#CSC: ==> non e' robusto
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 = $r->url->query;
+ 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") {
# finds the uri, url and filename
my $cicuri = $inputuri;
+ my $answerformat = $cgi->param('format');
+ $answerformat = "" if (not defined($answerformat));
+
+ if (($answerformat ne "gz") and ($answerformat ne "normal")
+ and ($answerformat ne "")) {
+ die "Wrong output format: $answerformat, must be 'normal' ".
+ "or 'gz'\n";
+ }
my $cicfilename = $cicuri;
$cicfilename =~ s/cic:(.*)/$1/;
print_request("cic",$cicuri,$cicurl,$cicfilename);
# Retrieves the file
- my $ciccontent = download(0,"cic",$cicurl,$cicfilename);
+ my $ciccontent = download(0,"cic",$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,$merged);
- }
- } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") {
+ } elsif ($http_method eq 'GET' and $http_path eq "/getdtd") {
my $filename = $inputuri;
$filename = $dtd_dir."/".$filename;
print "DTD: $inputuri ==> ($filename)\n";
answer($c,"<html><body><h1>Update done</h1></body></html>");
} elsif ($http_method eq 'GET' and $http_path eq "/ls") {
# send back keys that begin with a given uri
- my $baseuri = $http_query;
- $baseuri =~ s/^.*baseuri=(.*)&.*$/$1/;
+ my ($uritype,$uripattern,$uriprefix);
+ my $baseuri = $cgi->param('baseuri');
chop $baseuri if ($baseuri =~ /.*\/$/); # remove trailing "/"
- my $outype = $http_query; # output type, might be 'txt' or 'xml'
- $outype =~ s/^.*&type=(.*)$/$1/;
- if (($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>");
- } else { # valid output type
- print "BASEURI $baseuri, TYPE $outype\n";
- my $key;
- $cont = "";
- $cont .= "<urilist>\n" if ($outype eq "xml");
- foreach (keys(%map)) { # search for uri that begin with $baseuri
- if ($_ =~ /^$baseuri\//) {
- $cont .= "<uri>" if ($outype eq "xml");
- $cont .= $_;
- $cont .= "\n" if ($outype eq "txt");
- $cont .= "</uri>\n" if ($outype eq "xml");
- }
+ 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: $outype\n";
+ answer($c,"<html><body><h1>Invalid output type, may be ".
+ "\"txt\" or \"xml\"</h1></body></html>");
+ } else { # valid output
+ print "BASEURI $baseuri, FORMAT $outype\n";
+ $cont = finduris($uritype,$uripattern,$outype);
+ answer($c,$cont);
}
- $cont .= "</urilist>" if ($outype eq "xml");
- answer($c,$cont);
+ } 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>");
}
- } elsif ($http_method eq 'GET' and $http_path eq "/version") {
- print "Version requested!";
+ } elsif ($http_method eq 'GET' and $http_path eq "/help") {
+ print "Help requested!";
answer($c,"<html><body><h1>HTTP Getter Version ".
$VERSION."</h1></body></html>");
} else {
#================================
+sub finduris { # find uris for cic and theory trees generation
+ my ($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
+
+ print "FINDURIS, uritype: $uritype, uripattern: $uripattern, ".
+ "format: $format\n\n";
+
+ if (($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\/(.*)/$1/;
+
+ if ($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 .= '"http://localhost:8081/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,$typeflag>";
+}
#CSC: Too much powerful: creates even /home, /home/users/, ...
#CSC: Does not raise errors if could not create dirs/files
sub gzip { # gzip the content argument and save it to filename argument
my ($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,$filename) = @_;
+ my ($remove_headers,$str,$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 {
+ $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;
}
projects / helm.git / blobdiff